1 Introduction The 21st century is an era of digitalization and information. After years of development and application research, digital power plant construction has become more and more abundant and complete. In recent years, power companies have invested heavily in the digitalization of power plants. The realization of the digitization of power plant production and operation and the informationization of management, and the construction of a truly comprehensive digital power plant have become the targets for the construction of power plants.
At present, from the design of the power plant, to the construction and commissioning of the power plant, corresponding digitized and informationized products have been used at all stages. The design institutes of the power plant have adopted two-dimensional and three-dimensional design software to design the project; During the construction period of the power plant, the construction party and the construction party use the infrastructure information management system and P3 software to manage the project information and schedule control; after the plant is put into operation, the power plant operation and maintenance department uses DCS, S1S, EAM, ERP, and power plants. Automatic control and information management systems such as information portals provide reliable and accurate control and management of power plants. Based on the design stage of the power plant, this paper plans a unified plan for the information and digital construction of the power plant, and provides corresponding information construction plans for each phase of power plant construction. It also proposes how to achieve data succession and sharing between informatized products at each stage. .
2 Overview of digital power plant implementation planning In order to realize the goal of building a digital power plant, it is necessary to comprehensively plan the digitized and informatized products at each stage from the design of the power plant.
Digital design includes two-dimensional and three-dimensional design and design process management of power plants and power plant identification systems; digital construction includes digital procurement, information management during construction period, and progress management during construction period; digitized transfer includes files, models, and data related to power plant engineering; digitization The construction of the operation platform includes field bus technology, intelligent boost station, break point APS control technology, intelligent security, operation optimization, etc. The construction of the digital management platform includes management and control integration, all-round duty concept and information management.
3 Digital design Adopt three-dimensional digital design technology in the design process of power plants to provide high-quality design finished products for the construction of power plants.
The two-dimensional design in digital design mainly refers to the use of traditional tools such as Autocad, Office, and professional calculation software to realize the two-dimensional design of engineering projects. The design finished products include two-dimensional drawings, calculation books, inventory, and manuals.
In digital design, there is also an important information platform for design institutes to manage the design process, that is, design collaborative management platform and digital transfer platform. It realizes two-dimensional and three-dimensional collaborative design, multi-disciplinary collaborative design, and offsite within the design institute. Collaborative design, and provide a complete means for the design of finished products.
3.1 Three-dimensional digital design Using three-dimensional visual layout design technology, multi-professional collaborative design can realize the real grading, support and hanger design, cable bridge laying and other elaborate design of large gradient pipelines, and conduct collision check on three-dimensional digital models. Data consistency check and other means to solve the common and frequently-occurring diseases in the design process, eliminate problems such as “wrong, missing, touch, and missing†in the design process and the resulting design rework, and the quality of the plot can be greatly improved. .
Through the three-dimensional digital design platform to provide customers with complete construction drawings for power plant construction, the pipeline construction drawings provided can be directly extracted from the three-dimensional design software, not only accurate, clear expression, but also can contain thermal control points The basic information of the equipment components and other contents provide great convenience for the construction and debugging of the power plant.
The use of three-dimensional digital design tools can create a complete three-dimensional digital site model, which is an accurate three-dimensional virtual space model of virtual reality, through the design of the transfer platform can be realized vivid, intuitive visual three-dimensional digital simulation power plant digital transfer. The software view function enables real-time roaming of the entire main plant or area, which not only helps the installer understand the drawings and the process system, but also facilitates the operation and management of the power plant.
3.2 Power plant identification system An important basic work of the digital power plant is the coding of the identification system. In the construction of the power plant, the KKS coding work must be synchronized from the initial stage of design. In the digital transfer of the engineering design, the complete KKS of the professional design process needs to be provided. coding.
4 Digital construction The power plant engineering construction management information system (referred to as infrastructure MIS) and P3 project project management software are used to realize the comprehensive information management of contract, budget, equipment, schedule, and engineering of the power plant infrastructure.
4.1 Management Information System Construction in the Power Plant Construction Phase The management information system in the power plant construction phase is usually referred to as power plant infrastructure MIS. It is based on the relevant laws and regulations of project management, and adopts advanced computer network technology and database technology to establish an information integration system. Resource-sharing, powerful engineering project management work platform to realize the comprehensive management of contract, budget, equipment, schedule, and engineering information during the infrastructure construction phase of the power plant. Through the power plant construction phase information management system can coordinate the completion of business operations of the owners, construction units, supervision units, design units, to improve the quality of project construction, save investment and shorten the duration of the project, so as to obtain higher economic benefits.
During the construction and construction of power plants, a large amount of digital information on equipment, materials, quality, construction, drawings, information, finance, manufacturers, and personnel will be generated. These information will be used for power plant operations, equipment maintenance and maintenance, and material procurement. is very useful. Therefore, these digital information needs to be further categorized and finally submitted to the database of the production and operation information system to complete the digital transfer of management information during the construction phase.
4.2 Application of project management software P3 Project management software P3 shares the network platform with the power plant infrastructure MIS to realize the progress management of the power plant construction project. P3 can integrate resources, schedules, resource limits, and resource balance well, and then based on the materials, machinery, manpower, and other resources and costs of the construction contractor, based on the physical quantity and project volume to be completed. Quantitative, feasible, scientific, and reasonable schedules are dynamically managed to make adjustments to the plans through negotiation and determination as necessary, so that the construction quality and the orderly safety can be ensured while reducing costs. Construction and promotion of project management.
4.3 Digital procurement The design unit provides digital procurement support to the owner through a digital transfer platform.
Through the digital transfer platform, during the product inquiry stage, the owner can obtain the technical specifications of the equipment and components required by the construction unit for the construction of the power plant, and guide the owner to inquire the manufacturers according to the design requirements; the owner can obtain the contract during the contract signing stage. The exact model and quantity of equipment and parts provided by the design unit facilitate the signing of contracts and reduce waste.
5 Digitized transfer of engineering information and data formed during the design, procurement, and construction phases, digitally, with the help of a digital transfer platform to transfer in phases to meet each other's business needs.
5.1 Digital handover methods (1) Digital transfer of design to procurement: This is a digital document that is submitted to the procurement process at the design stage to ensure the technical and economical performance of equipment and materials procurement and guarantee the advanced performance of equipment.
(2) Digital transfer of design to construction: This is the way that the design unit submits various documents such as construction drawings and construction technical specifications to the construction unit to ensure the construction technical requirements and construction progress requirements;
(3) Digital transfer of procurement to construction: This is a detailed digital file for equipment, materials, and technical documentation submitted by each unit responsible for construction, installation, commissioning, and operation of equipment and materials procurement.
(4) Digital transfer of construction to operation: This is the final digital transfer. It is a standardized and standardized transfer, and it is also a full digital transfer.
5.2 Digital Transfer of Content The content of the digital power plant handover mainly consists of engineering documents, engineering models, and engineering data.
5.2.1 Project Files The project files include a total of five types of electronic documents:
(1) Design documents refer to the textual materials prepared in each design stage of the engineering design, including various technical reports, technical specifications, instructions and drawings. Coverage process and machinery, instrumentation, electrical, civil engineering and other professional (2) Equipment documentation refers to the textual materials and drawings provided by the supplier related to the supply content, including calculation books, data sheets, material tables, specifications, drawings and Operating manuals and maintenance manuals, spare parts list, quality guarantees, etc. Can be divided into equipment factory data, equipment import data, equipment ledger and spare parts, spare parts information.
(3) Procurement documents Procurement documents include equipment requisitions, equipment tenders, equipment tenders, equipment evaluation documents, equipment procurement contracts, equipment transportation and acceptance inspection records, as well as equipment procurement related code and other information.
(4) Installation and commissioning documents Installation and commissioning documents record the installation and commissioning process of major power plant equipment and related data, generally including the start-up commissioning program, test plan measures, start-up of commissioning headquarters documents, orders, minutes, records, etc., test run shift records and operation records , Test operation stage defects, failure analysis records and accident handling advice.
(5) Project Completion Documentation The project completion document includes the 12 classification documents and project completion settlement documents listed in the “Evaluation Criteria for the Upgrading of Thermal Power Generation Unitsâ€.
5.2.2 Engineering model The engineering model is an engineering three-dimensional model created using special three-dimensional digital design software. It mainly includes: the main building's three-dimensional model and the underground pipeline model of the plant, including the pipeline model, smoke duct model, valve model, equipment model, Main building structure model, main building model, closed bus model, total box bus model, cable bridge model, etc.
5.2.3 Engineering data (1) Design data pipeline: name, diameter, material, insulation and other data;
Equipment: name, KKS code, equipment specification, manufacturing plant, etc.;
Important valves (electric door, pneumatic door, regulating valve, etc.): name, KKS code, pressure rating, nominal diameter, and other data.
(2) Identification and coding data Power plant identification system (KKS): Process expertise to equipment and important parts level, electrical specialty and thermal control professional to control panel level, civil engineering to main structures, information equipment to panel and main equipment level.
Key material coding system: coding of all equipment supplies, including major equipment and spare parts such as valves, pipes, cables, and design content forms with KKS codes and material codes.
Other standard coding systems: Various types of information codes used by power plant digital operation management and conforming to relevant national standards.
Self-use coding system: information codes such as production technology, production management, safety supervision and environmental protection, financial funds, information codes of fixed assets classification, fuels, etc., labor and capital personnel, scientific and technological files, office services, and other types of information codes, employees, departmental groups, Administrative logistics and other types of information code.
(3) Construction management data During the project construction management process, a large amount of construction management data has been accumulated in the system, which is a rich data resource for understanding and mastering the entire process of power plant construction.
6 Digital Operation Platform Construction 6.1 Fieldbus Technology Fieldbus Technology (FCS) is a fully open, all-digital, fully decentralized new control technology. It realizes the digitization and networking of field-level equipment. Its fundamental starting point is the power plant technology. The field equipment information of the process is digitized, especially the information from the grass-roots control level can be timely and accurately transmitted to the production management system. It is the cornerstone of the digital power plant in the true sense. A large number of field-level equipment digital status signals are transmitted to the digital control system. This can not only change the “device troubleshooting†to “maintenance of equipment status,†but more importantly, a large amount of on-site real-time information provides the basis and basis for management decisions.
The promotion and application of fieldbus in the whole plant can promote the overall intelligence and digitization of the basic unit of the power plant, greatly improve the equipment state management level and the safety and reliability of the operation equipment, reduce the operation and maintenance workload, and reduce the operating cost. Effectively speed up the progress of the project and reduce the total investment in the project.
6.2 Intelligent protection and intelligent security 6.2.1 Intelligent protection Thermal relay control system relay contacts, logic switches, transmitters, actuators, primary components, etc., due to product quality, environmental impact, operating time, management and maintenance and other factors, objectively It is prone to failure. The protection system redundancy is introduced to introduce redundant signals and avoid single point of failure caused by tripping. For the single-point signal protection logic, the signal three-by-two selection logic is used as much as possible. For the analog signal entering the protection interlock system, reasonably set the rate of change protection, delay time, and reduce the range to improve the function of fault diagnosis such as the removal of the bad signal, set the protection interlock signal bad value removal and alarm logic, reduce or Eliminating system failures caused by faulty signal changes.
Based on the digitalization of field devices, the company improved the state management function of the equipment, introduced relevant fault diagnosis, on-line monitoring and management of boiler life, and adopted intelligent systems such as Vibration Analysis System (VMS) on turbines and large rotating auxiliary machines to realize intelligent accident prediction. Pre-control, effectively improve the reliability of the unit operation and ensure safe operation.
6.2.2 Smart Security Intelligent perimeter security systems using the Internet of Things technology and digital video surveillance systems are used to achieve intelligent digital protection of power plants.
The security system of the power plant includes four major parts: the video surveillance system, the perimeter protection system, the patrol system, and the access control system. The security system adopts digital and intelligent front-end monitoring and detection equipment to transmit images and data through the network, ensuring the quality of the monitoring screen, improving the timeliness and accuracy of the signal, and transmitting security information to the monitoring system through network interconnection. The production management system realizes the linkage of various subsystems and provides better protection for the safe operation of the running equipment and the security protection of the power plant.
6.3 APS technology The APS system is essentially the proceduralization of the operational procedures of the power plant, which enables the unit to start and stop the operation of the equipment in accordance with the prescribed procedures. Its application ensures that the start-stop process of the main and auxiliary equipment of the unit strictly follows the operating procedures. It simplifies the work of the operator, reduces the possibility of misoperation, improves the safety and reliability of the unit operation, and also shortens the unit startup time, raises the economic benefits of the unit, and provides powerful technical support for reducing the operating personnel.
The application of the APS system is not only the optimization of the main equipment operation specification, but also the optimization of the control system. It not only requires the automatic control strategy to be more perfect and mature, the unit operating parameters and processes are accurate and detailed, but also puts forward higher requirements on the management level of the equipment. The quick and accurate start-up of the unit can shorten the start-up and stop-time of the unit. The optimized control strategy can reduce the coal consumption and fuel consumption during the start-stop process and improve the economic benefits of the unit operation.
6.4 Digital boost station control system The digital boost station control system is based on the digitalization of primary equipment information, the networking of secondary equipment and a unified information platform, and adopts advanced sensors, electronics, information, communications, control, artificial intelligence and other technologies. , Realize remote monitoring of boost station equipment, programmatic automatic operation control, equipment status overhaul, operation state adaptation, intelligent analysis and decision making, automatic reconstruction after network failure, and flexible interaction with dispatch center information. The digitization and operation management of the secondary equipment are digitized.
The digital boost station control system communicates with other systems through the station control layer to achieve data sharing. In addition, a communication interface with the power plant production management system is also provided so that the booster station control system can seamlessly connect with the entire digital power plant information system. Helping power plant owners and group companies to understand and count the operating conditions of the power plants, better setting the power plant's production plans, better regulating the production of the power plants, and increasing the digitization level of the power plants.
7 Construction of digital management platform Establish a unified plant-wide 10-Gigabit Ethernet power plant LAN, a real-time database for process data and a relational database for management data, and construct data-oriented power plants through data mining on the basis of real-time database and relational database data. Managed data warehouses, build a complete plant digital management platform on a unified network and data platform, and achieve comprehensive digital management of the power plant (integration of management and control).
The integrated management and control solution is a set of systems that provide information support for the power plant's management business and operational processes starting from the production and operation objectives of the power plant. It integrates the data of the power plant's process control, plant level monitoring, and management information. The organic, financial, and organic organization is organized into an orderly and interactive whole, and the generalized closed-loop thinking of planning, implementation, inspection, and adjustment enables the entire organization to have self-optimizing capabilities, to achieve the maximization of organizational goals, and to provide an all-round duty. Advanced concept technology platform.
The integrated management and control solution manages plant-wide process control level data, plant-level monitoring layer data and management information layer data. From the source and characteristics of the data, the three-level data can be clearly decomposed into three categories: control system (DCS), plant-level monitoring information system, and management information system. What DCS completes is the real-time monitoring of the production process. The plant-level monitoring information system completes the real-time management and optimization at the plant level. The management information system completes the information flow and process optimization of the management business.
The conventional management and control integration is the integration of various real-time data and management information at the production site, which lays the data foundation for the full realization of the informationization of the power plant. However, just having a data foundation is not a fully integrated management and control system. The integrated management and control system not only requires the integration of real-time data and management information, but also requires the integration of management optimization process and control optimization process. The three-tier data structure and related information products only constitute the horizontal architecture of the integrated system of management and control. In order to play a greater role, on the basis of the horizontal architecture, there is also a need for a vertical architecture in which data and functions are integrated. In the vertical architecture, the interconnection of three layers of data is a basic function, and the optimization of the management process and production control with the production and business goals as the core is the backbone of the vertical architecture of the management and control integration system.
Therefore, there are few investments in capital construction, high production efficiency, low failure losses, low management and maintenance costs, and as many on-grid power as possible. The management processes and production control optimization solutions that target as much as possible on-grid tariffs become Thermal power plant management and control integration solution is different from the main features of general information products. As for DCS, plant-level monitoring information systems, and management information systems, they are information modules used in solving these problems, and computer networks, data security and isolation technologies, model simulation technologies, real-time databases, workflow technologies, and management services. Technologies such as development platforms are the technical support for these informatization software products in integrated control and control solutions. According to this principle, the power plant management and control integration system is vertically divided into four aspects: production management, asset management, operation management, and administrative management.
Production management is characterized by low production and operating efficiency, low failure losses, and low operation and maintenance costs. Production management includes functions such as operation management, operation optimization, operation evaluation, safety management, and training management, covering the scope of production-related functions of plant-level monitoring information systems and management information systems, and arranging data and functions at all levels according to production management requirements. Summarize and connect to form a comprehensive dynamic management system.
Asset management is an asset-intensive enterprise that encompasses the entire life cycle of assets from design procurement, installation and commissioning, operation management, and transfer retirement. It uses modern information technology (IT) to improve the operational reliability and value of assets, and to reduce maintenance and repairs. Cost, a set of systems that enhance the level of corporate management and personnel literacy, and strengthen the core competitiveness of asset-intensive companies. Asset management includes the functions of equipment management, maintenance management and material management in the management information system, and is connected with the equipment-related real-time data in the plant-level monitoring information system. Under the current equipment and technology conditions, it can greatly improve the thermal power plant equipment. Use value.
The operation management takes the comprehensive plan management as the main line, the overall budget and the cost management as the core, improves the real-time cost calculation speed, and satisfies the commercialized operation management requirements. Through the calculation of real-time production costs, the quotation is more accurate and timely, so as to achieve the purpose of reducing costs and increasing revenue. Business management includes planning management, fuel management, cost management, etc., and is closely related to the optimization of operations in production management and material management in asset management.
Administrative management is mainly the concept of office automation. Through effective resource sharing and information exchange and publication, the purpose of improving personal work efficiency, reducing labor intensity, and reducing duplication of work is achieved. It emphasizes collaborative work and knowledge sharing, unified management of the human-computer interaction of the entire information process, and supports the power plant management and management objectives.
This four-part function is also not a parallel parallel relationship. Production management and asset management are the two business backbones of the power plant; operation management is the main line of all work of the power plant; production management and asset management obtain objectives and requirements from the operation and management, and provide performance management parameters to the operation management; and the administrative management is All of the information functions provide a collaborative and knowledge platform, which is the interaction interface of all personnel and information systems.
It can be seen that the integrated management and control solution is based on the technical integration product of the whole plant digital management platform. On the interoperable and interconnected plant-wide data platform, the data and functions at all levels are reorganized to meet the all-round duty and production management. Needs.
8 Concluding remarks With the development of computer network technology, automatic control technology and information technology, the three-dimensional design technology of digital power plants, fieldbus technology (FCS), APS control technology, field equipment intelligence technology and information integration technology are becoming increasingly mature. The construction of a digital power plant with less investment, safer operation, and lower maintenance costs has become the main goal pursued by major power generation groups.
At present, from the design of the power plant, to the construction and commissioning of the power plant, corresponding digitized and informationized products have been used at all stages. The design institutes of the power plant have adopted two-dimensional and three-dimensional design software to design the project; During the construction period of the power plant, the construction party and the construction party use the infrastructure information management system and P3 software to manage the project information and schedule control; after the plant is put into operation, the power plant operation and maintenance department uses DCS, S1S, EAM, ERP, and power plants. Automatic control and information management systems such as information portals provide reliable and accurate control and management of power plants. Based on the design stage of the power plant, this paper plans a unified plan for the information and digital construction of the power plant, and provides corresponding information construction plans for each phase of power plant construction. It also proposes how to achieve data succession and sharing between informatized products at each stage. .
2 Overview of digital power plant implementation planning In order to realize the goal of building a digital power plant, it is necessary to comprehensively plan the digitized and informatized products at each stage from the design of the power plant.
Digital design includes two-dimensional and three-dimensional design and design process management of power plants and power plant identification systems; digital construction includes digital procurement, information management during construction period, and progress management during construction period; digitized transfer includes files, models, and data related to power plant engineering; digitization The construction of the operation platform includes field bus technology, intelligent boost station, break point APS control technology, intelligent security, operation optimization, etc. The construction of the digital management platform includes management and control integration, all-round duty concept and information management.
3 Digital design Adopt three-dimensional digital design technology in the design process of power plants to provide high-quality design finished products for the construction of power plants.
The two-dimensional design in digital design mainly refers to the use of traditional tools such as Autocad, Office, and professional calculation software to realize the two-dimensional design of engineering projects. The design finished products include two-dimensional drawings, calculation books, inventory, and manuals.
In digital design, there is also an important information platform for design institutes to manage the design process, that is, design collaborative management platform and digital transfer platform. It realizes two-dimensional and three-dimensional collaborative design, multi-disciplinary collaborative design, and offsite within the design institute. Collaborative design, and provide a complete means for the design of finished products.
3.1 Three-dimensional digital design Using three-dimensional visual layout design technology, multi-professional collaborative design can realize the real grading, support and hanger design, cable bridge laying and other elaborate design of large gradient pipelines, and conduct collision check on three-dimensional digital models. Data consistency check and other means to solve the common and frequently-occurring diseases in the design process, eliminate problems such as “wrong, missing, touch, and missing†in the design process and the resulting design rework, and the quality of the plot can be greatly improved. .
Through the three-dimensional digital design platform to provide customers with complete construction drawings for power plant construction, the pipeline construction drawings provided can be directly extracted from the three-dimensional design software, not only accurate, clear expression, but also can contain thermal control points The basic information of the equipment components and other contents provide great convenience for the construction and debugging of the power plant.
The use of three-dimensional digital design tools can create a complete three-dimensional digital site model, which is an accurate three-dimensional virtual space model of virtual reality, through the design of the transfer platform can be realized vivid, intuitive visual three-dimensional digital simulation power plant digital transfer. The software view function enables real-time roaming of the entire main plant or area, which not only helps the installer understand the drawings and the process system, but also facilitates the operation and management of the power plant.
3.2 Power plant identification system An important basic work of the digital power plant is the coding of the identification system. In the construction of the power plant, the KKS coding work must be synchronized from the initial stage of design. In the digital transfer of the engineering design, the complete KKS of the professional design process needs to be provided. coding.
4 Digital construction The power plant engineering construction management information system (referred to as infrastructure MIS) and P3 project project management software are used to realize the comprehensive information management of contract, budget, equipment, schedule, and engineering of the power plant infrastructure.
4.1 Management Information System Construction in the Power Plant Construction Phase The management information system in the power plant construction phase is usually referred to as power plant infrastructure MIS. It is based on the relevant laws and regulations of project management, and adopts advanced computer network technology and database technology to establish an information integration system. Resource-sharing, powerful engineering project management work platform to realize the comprehensive management of contract, budget, equipment, schedule, and engineering information during the infrastructure construction phase of the power plant. Through the power plant construction phase information management system can coordinate the completion of business operations of the owners, construction units, supervision units, design units, to improve the quality of project construction, save investment and shorten the duration of the project, so as to obtain higher economic benefits.
During the construction and construction of power plants, a large amount of digital information on equipment, materials, quality, construction, drawings, information, finance, manufacturers, and personnel will be generated. These information will be used for power plant operations, equipment maintenance and maintenance, and material procurement. is very useful. Therefore, these digital information needs to be further categorized and finally submitted to the database of the production and operation information system to complete the digital transfer of management information during the construction phase.
4.2 Application of project management software P3 Project management software P3 shares the network platform with the power plant infrastructure MIS to realize the progress management of the power plant construction project. P3 can integrate resources, schedules, resource limits, and resource balance well, and then based on the materials, machinery, manpower, and other resources and costs of the construction contractor, based on the physical quantity and project volume to be completed. Quantitative, feasible, scientific, and reasonable schedules are dynamically managed to make adjustments to the plans through negotiation and determination as necessary, so that the construction quality and the orderly safety can be ensured while reducing costs. Construction and promotion of project management.
4.3 Digital procurement The design unit provides digital procurement support to the owner through a digital transfer platform.
Through the digital transfer platform, during the product inquiry stage, the owner can obtain the technical specifications of the equipment and components required by the construction unit for the construction of the power plant, and guide the owner to inquire the manufacturers according to the design requirements; the owner can obtain the contract during the contract signing stage. The exact model and quantity of equipment and parts provided by the design unit facilitate the signing of contracts and reduce waste.
5 Digitized transfer of engineering information and data formed during the design, procurement, and construction phases, digitally, with the help of a digital transfer platform to transfer in phases to meet each other's business needs.
5.1 Digital handover methods (1) Digital transfer of design to procurement: This is a digital document that is submitted to the procurement process at the design stage to ensure the technical and economical performance of equipment and materials procurement and guarantee the advanced performance of equipment.
(2) Digital transfer of design to construction: This is the way that the design unit submits various documents such as construction drawings and construction technical specifications to the construction unit to ensure the construction technical requirements and construction progress requirements;
(3) Digital transfer of procurement to construction: This is a detailed digital file for equipment, materials, and technical documentation submitted by each unit responsible for construction, installation, commissioning, and operation of equipment and materials procurement.
(4) Digital transfer of construction to operation: This is the final digital transfer. It is a standardized and standardized transfer, and it is also a full digital transfer.
5.2 Digital Transfer of Content The content of the digital power plant handover mainly consists of engineering documents, engineering models, and engineering data.
5.2.1 Project Files The project files include a total of five types of electronic documents:
(1) Design documents refer to the textual materials prepared in each design stage of the engineering design, including various technical reports, technical specifications, instructions and drawings. Coverage process and machinery, instrumentation, electrical, civil engineering and other professional (2) Equipment documentation refers to the textual materials and drawings provided by the supplier related to the supply content, including calculation books, data sheets, material tables, specifications, drawings and Operating manuals and maintenance manuals, spare parts list, quality guarantees, etc. Can be divided into equipment factory data, equipment import data, equipment ledger and spare parts, spare parts information.
(3) Procurement documents Procurement documents include equipment requisitions, equipment tenders, equipment tenders, equipment evaluation documents, equipment procurement contracts, equipment transportation and acceptance inspection records, as well as equipment procurement related code and other information.
(4) Installation and commissioning documents Installation and commissioning documents record the installation and commissioning process of major power plant equipment and related data, generally including the start-up commissioning program, test plan measures, start-up of commissioning headquarters documents, orders, minutes, records, etc., test run shift records and operation records , Test operation stage defects, failure analysis records and accident handling advice.
(5) Project Completion Documentation The project completion document includes the 12 classification documents and project completion settlement documents listed in the “Evaluation Criteria for the Upgrading of Thermal Power Generation Unitsâ€.
5.2.2 Engineering model The engineering model is an engineering three-dimensional model created using special three-dimensional digital design software. It mainly includes: the main building's three-dimensional model and the underground pipeline model of the plant, including the pipeline model, smoke duct model, valve model, equipment model, Main building structure model, main building model, closed bus model, total box bus model, cable bridge model, etc.
5.2.3 Engineering data (1) Design data pipeline: name, diameter, material, insulation and other data;
Equipment: name, KKS code, equipment specification, manufacturing plant, etc.;
Important valves (electric door, pneumatic door, regulating valve, etc.): name, KKS code, pressure rating, nominal diameter, and other data.
(2) Identification and coding data Power plant identification system (KKS): Process expertise to equipment and important parts level, electrical specialty and thermal control professional to control panel level, civil engineering to main structures, information equipment to panel and main equipment level.
Key material coding system: coding of all equipment supplies, including major equipment and spare parts such as valves, pipes, cables, and design content forms with KKS codes and material codes.
Other standard coding systems: Various types of information codes used by power plant digital operation management and conforming to relevant national standards.
Self-use coding system: information codes such as production technology, production management, safety supervision and environmental protection, financial funds, information codes of fixed assets classification, fuels, etc., labor and capital personnel, scientific and technological files, office services, and other types of information codes, employees, departmental groups, Administrative logistics and other types of information code.
(3) Construction management data During the project construction management process, a large amount of construction management data has been accumulated in the system, which is a rich data resource for understanding and mastering the entire process of power plant construction.
6 Digital Operation Platform Construction 6.1 Fieldbus Technology Fieldbus Technology (FCS) is a fully open, all-digital, fully decentralized new control technology. It realizes the digitization and networking of field-level equipment. Its fundamental starting point is the power plant technology. The field equipment information of the process is digitized, especially the information from the grass-roots control level can be timely and accurately transmitted to the production management system. It is the cornerstone of the digital power plant in the true sense. A large number of field-level equipment digital status signals are transmitted to the digital control system. This can not only change the “device troubleshooting†to “maintenance of equipment status,†but more importantly, a large amount of on-site real-time information provides the basis and basis for management decisions.
The promotion and application of fieldbus in the whole plant can promote the overall intelligence and digitization of the basic unit of the power plant, greatly improve the equipment state management level and the safety and reliability of the operation equipment, reduce the operation and maintenance workload, and reduce the operating cost. Effectively speed up the progress of the project and reduce the total investment in the project.
6.2 Intelligent protection and intelligent security 6.2.1 Intelligent protection Thermal relay control system relay contacts, logic switches, transmitters, actuators, primary components, etc., due to product quality, environmental impact, operating time, management and maintenance and other factors, objectively It is prone to failure. The protection system redundancy is introduced to introduce redundant signals and avoid single point of failure caused by tripping. For the single-point signal protection logic, the signal three-by-two selection logic is used as much as possible. For the analog signal entering the protection interlock system, reasonably set the rate of change protection, delay time, and reduce the range to improve the function of fault diagnosis such as the removal of the bad signal, set the protection interlock signal bad value removal and alarm logic, reduce or Eliminating system failures caused by faulty signal changes.
Based on the digitalization of field devices, the company improved the state management function of the equipment, introduced relevant fault diagnosis, on-line monitoring and management of boiler life, and adopted intelligent systems such as Vibration Analysis System (VMS) on turbines and large rotating auxiliary machines to realize intelligent accident prediction. Pre-control, effectively improve the reliability of the unit operation and ensure safe operation.
6.2.2 Smart Security Intelligent perimeter security systems using the Internet of Things technology and digital video surveillance systems are used to achieve intelligent digital protection of power plants.
The security system of the power plant includes four major parts: the video surveillance system, the perimeter protection system, the patrol system, and the access control system. The security system adopts digital and intelligent front-end monitoring and detection equipment to transmit images and data through the network, ensuring the quality of the monitoring screen, improving the timeliness and accuracy of the signal, and transmitting security information to the monitoring system through network interconnection. The production management system realizes the linkage of various subsystems and provides better protection for the safe operation of the running equipment and the security protection of the power plant.
6.3 APS technology The APS system is essentially the proceduralization of the operational procedures of the power plant, which enables the unit to start and stop the operation of the equipment in accordance with the prescribed procedures. Its application ensures that the start-stop process of the main and auxiliary equipment of the unit strictly follows the operating procedures. It simplifies the work of the operator, reduces the possibility of misoperation, improves the safety and reliability of the unit operation, and also shortens the unit startup time, raises the economic benefits of the unit, and provides powerful technical support for reducing the operating personnel.
The application of the APS system is not only the optimization of the main equipment operation specification, but also the optimization of the control system. It not only requires the automatic control strategy to be more perfect and mature, the unit operating parameters and processes are accurate and detailed, but also puts forward higher requirements on the management level of the equipment. The quick and accurate start-up of the unit can shorten the start-up and stop-time of the unit. The optimized control strategy can reduce the coal consumption and fuel consumption during the start-stop process and improve the economic benefits of the unit operation.
6.4 Digital boost station control system The digital boost station control system is based on the digitalization of primary equipment information, the networking of secondary equipment and a unified information platform, and adopts advanced sensors, electronics, information, communications, control, artificial intelligence and other technologies. , Realize remote monitoring of boost station equipment, programmatic automatic operation control, equipment status overhaul, operation state adaptation, intelligent analysis and decision making, automatic reconstruction after network failure, and flexible interaction with dispatch center information. The digitization and operation management of the secondary equipment are digitized.
The digital boost station control system communicates with other systems through the station control layer to achieve data sharing. In addition, a communication interface with the power plant production management system is also provided so that the booster station control system can seamlessly connect with the entire digital power plant information system. Helping power plant owners and group companies to understand and count the operating conditions of the power plants, better setting the power plant's production plans, better regulating the production of the power plants, and increasing the digitization level of the power plants.
7 Construction of digital management platform Establish a unified plant-wide 10-Gigabit Ethernet power plant LAN, a real-time database for process data and a relational database for management data, and construct data-oriented power plants through data mining on the basis of real-time database and relational database data. Managed data warehouses, build a complete plant digital management platform on a unified network and data platform, and achieve comprehensive digital management of the power plant (integration of management and control).
The integrated management and control solution is a set of systems that provide information support for the power plant's management business and operational processes starting from the production and operation objectives of the power plant. It integrates the data of the power plant's process control, plant level monitoring, and management information. The organic, financial, and organic organization is organized into an orderly and interactive whole, and the generalized closed-loop thinking of planning, implementation, inspection, and adjustment enables the entire organization to have self-optimizing capabilities, to achieve the maximization of organizational goals, and to provide an all-round duty. Advanced concept technology platform.
The integrated management and control solution manages plant-wide process control level data, plant-level monitoring layer data and management information layer data. From the source and characteristics of the data, the three-level data can be clearly decomposed into three categories: control system (DCS), plant-level monitoring information system, and management information system. What DCS completes is the real-time monitoring of the production process. The plant-level monitoring information system completes the real-time management and optimization at the plant level. The management information system completes the information flow and process optimization of the management business.
The conventional management and control integration is the integration of various real-time data and management information at the production site, which lays the data foundation for the full realization of the informationization of the power plant. However, just having a data foundation is not a fully integrated management and control system. The integrated management and control system not only requires the integration of real-time data and management information, but also requires the integration of management optimization process and control optimization process. The three-tier data structure and related information products only constitute the horizontal architecture of the integrated system of management and control. In order to play a greater role, on the basis of the horizontal architecture, there is also a need for a vertical architecture in which data and functions are integrated. In the vertical architecture, the interconnection of three layers of data is a basic function, and the optimization of the management process and production control with the production and business goals as the core is the backbone of the vertical architecture of the management and control integration system.
Therefore, there are few investments in capital construction, high production efficiency, low failure losses, low management and maintenance costs, and as many on-grid power as possible. The management processes and production control optimization solutions that target as much as possible on-grid tariffs become Thermal power plant management and control integration solution is different from the main features of general information products. As for DCS, plant-level monitoring information systems, and management information systems, they are information modules used in solving these problems, and computer networks, data security and isolation technologies, model simulation technologies, real-time databases, workflow technologies, and management services. Technologies such as development platforms are the technical support for these informatization software products in integrated control and control solutions. According to this principle, the power plant management and control integration system is vertically divided into four aspects: production management, asset management, operation management, and administrative management.
Production management is characterized by low production and operating efficiency, low failure losses, and low operation and maintenance costs. Production management includes functions such as operation management, operation optimization, operation evaluation, safety management, and training management, covering the scope of production-related functions of plant-level monitoring information systems and management information systems, and arranging data and functions at all levels according to production management requirements. Summarize and connect to form a comprehensive dynamic management system.
Asset management is an asset-intensive enterprise that encompasses the entire life cycle of assets from design procurement, installation and commissioning, operation management, and transfer retirement. It uses modern information technology (IT) to improve the operational reliability and value of assets, and to reduce maintenance and repairs. Cost, a set of systems that enhance the level of corporate management and personnel literacy, and strengthen the core competitiveness of asset-intensive companies. Asset management includes the functions of equipment management, maintenance management and material management in the management information system, and is connected with the equipment-related real-time data in the plant-level monitoring information system. Under the current equipment and technology conditions, it can greatly improve the thermal power plant equipment. Use value.
The operation management takes the comprehensive plan management as the main line, the overall budget and the cost management as the core, improves the real-time cost calculation speed, and satisfies the commercialized operation management requirements. Through the calculation of real-time production costs, the quotation is more accurate and timely, so as to achieve the purpose of reducing costs and increasing revenue. Business management includes planning management, fuel management, cost management, etc., and is closely related to the optimization of operations in production management and material management in asset management.
Administrative management is mainly the concept of office automation. Through effective resource sharing and information exchange and publication, the purpose of improving personal work efficiency, reducing labor intensity, and reducing duplication of work is achieved. It emphasizes collaborative work and knowledge sharing, unified management of the human-computer interaction of the entire information process, and supports the power plant management and management objectives.
This four-part function is also not a parallel parallel relationship. Production management and asset management are the two business backbones of the power plant; operation management is the main line of all work of the power plant; production management and asset management obtain objectives and requirements from the operation and management, and provide performance management parameters to the operation management; and the administrative management is All of the information functions provide a collaborative and knowledge platform, which is the interaction interface of all personnel and information systems.
It can be seen that the integrated management and control solution is based on the technical integration product of the whole plant digital management platform. On the interoperable and interconnected plant-wide data platform, the data and functions at all levels are reorganized to meet the all-round duty and production management. Needs.
8 Concluding remarks With the development of computer network technology, automatic control technology and information technology, the three-dimensional design technology of digital power plants, fieldbus technology (FCS), APS control technology, field equipment intelligence technology and information integration technology are becoming increasingly mature. The construction of a digital power plant with less investment, safer operation, and lower maintenance costs has become the main goal pursued by major power generation groups.
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