I. System Overview With the accelerating process of urbanization, there is great potential for the future development of urban rail transit construction in China. (The State Council has approved the construction of subways with three indicators - the urban population is over 3 million, the GDP is over 100 billion yuan, and the local fiscal general budget revenue is over 10 billion yuan. At present, nearly 50 cities across the country are up to standard). With the increase of investment quotas, urban rail transit construction is expected to become a new investment hotspot after large-scale investment in railways. Urban rail transit will become the upstart of infrastructure investment during the “Twelfth Five-Year Plan†period, and China’s urban rail transit construction is expected to usher in Golden development period.
The ground construction of current urban rail transit includes AFC (automatic ticketing system), PIS (passenger information system), BAS (environmental monitoring system), FAS (fire and fire monitoring system), PSD (station screen gate system), PSCADA (power monitoring) And the data acquisition), MCS (main control system), SIG (signal system), NCS (network communication system) nine major systems, this article mainly discusses PSCADA system's demand, the structure and the application.
Second, the system requirements PSCADA (power monitoring and data acquisition) system: including the entire line from a number of integrated automation systems substation; SCADA (SupervisoryControlAndDataAcquisition) system, that is, data acquisition and monitoring and control systems. SCADA system is based on computer-based DCS and power automation monitoring system; it has a wide range of applications, can be applied to power, metallurgy, petroleum, chemical and other fields of data acquisition and monitoring control and process control and many other fields;
The subway power monitoring subsystem is tightly integrated with the integrated monitoring system (ISCS) of the metro industry to realize the functions of the PSCADA sub-system and to jointly complete the hierarchical real-time monitoring of the operation of the power supply equipment and the catenary (or rail) of the substation. Control and deal with various abnormal accidents and alarm events of the power supply system to ensure the normal operation of the system. At the same time, the degree of automation of dispatching, management and maintenance of the power supply system is greatly improved, the quality of power supply is improved, and the system is operated safely and reliably.
12kV Switchgear, 750V Switchgear, 0.4kV Switchgear, Traction Transformer, Silicon Rectifier, Distribution Transformer, Drainage Cabinet, Stray Current Monitoring Device, Traction Network Electric Isolation Switch, Subway Substation Integrated Automation System and Power Supply System The integrated monitoring and control protection device and intelligent acquisition device equipped with a regenerative energy utilization device, a rail potential limiting device, etc. are connected through a communication interface to realize centralized monitoring.
According to the requirements of the smart grid system, the requirements for controlling industrial computers are as follows:
u Passed four levels of certification by the State Power Research Institute of China, and complied with IEC61850-3 and IEEE1613 certification;
u power supply and interface to meet the requirements of surge 4-level immunity, electrostatic 4-level immunity;
u The power input supports DC 110V/220V, AC 220V/50Hz power supply, to meet the redundant power supply, to support the continuous replacement of the whole machine, and to maintain the power supply of the module; it is required to support the power failure alarm function;
u Supports multiple communication interfaces and flexible expansion (10 serial ports: Opto-isolated circuit design is used to achieve stable operation in harsh, complex and changeable electromagnetic environments; 6 network ports; 6 USB ports; 1 VGA port; 1 expansion slot);
u standard 19-inch shelves fanless, low power consumption, fully sealed products;
Third, the system description PSCADA system includes a number of substation integrated automation system across the line, the system can be divided into two categories:
u Traction and decompression mixed substation (hereinafter referred to as the mixing station)
u step-down substation (hereinafter referred to as step-down station)
The comprehensive automation system of the traction and decompression hybrid substation at the station and depot achieves data exchange between the power dispatch center and the integrated automation system of the substation through the interface with the integrated monitoring system of the station and the depot.
The substation automation system adopts a hierarchical and distributed system structure. The system consists of substation station level management, network communication layer, and spacing device layer. The system uses the power supply equipment as the monitoring object. The 10kV and 0.4kV AC protection and monitoring unit, the DC750V DC protection monitoring and control unit, the AC and DC system monitoring unit, the transformer and rectifier monitoring unit, the draining cabinet and the stray current monitoring unit, and the rails are located in the network. Potential-limiting devices, electrical isolation switches, and other distributed floor-level devices are connected and managed centrally through industrial computers.
The following figure shows the typical structure of the PSCADA system:
The station-level management consists of industrial control computers, communication processors, switches, and intelligent measurement and control units installed in the control signal panel. This layer mainly completes the functions of data communication processing, man-machine interface, and database of the entire station, and is the interface between the system and the operation and maintenance personnel.
u Data communication station station control level network Interval level network u Space equipment layer Space layer intelligent equipment mainly includes 10kV comprehensive protection monitoring and control unit, 750V DC switchgear protection and monitoring unit, 0.4kV low voltage switchgear monitoring unit, braking energy consumption monitoring unit , stray current monitoring unit, rectifier monitoring unit, AC and DC power system monitoring unit, rectifier transformer thermostat, power transformer thermostat, all smart devices by communication access integrated automation system.
The professional sealed industrial computer SPC-8231 in the Yanxiang Power Industry Co., Ltd. is mainly responsible for the statistical processing of operating data and status records in the subway PSCADA system; data information layering and diversion exchange automation control; and the fault alarm function can be provided immediately when the substation operation fails. Fault problems and so on.
The new SPC-8231 product of EVOC meets the important indexes of metro PSCADA equipment application:
(Figure 3: SPC-8231)
u Through the State Electric Power Institute's four-level power certification, in line with IEC61850-3 and IEEE1613 certification IEC61850-3 certification to ensure the anti-electromagnetic interference capability of network equipment used in substations, IEEE1613 standard clarifies the standard environment and test of communication interconnection equipment. Claim. With IEC61850-3 and IEEE1613 professional certification, it can communicate with different devices in the substation.
u Meet the EMC index of the power industry. The power supply and interface have high EMC performance such as 4-level surge immunity and 4-level static immunity, meet the insulation performance requirements in the industry, and the serial port adopts electronic isolation design to realize the whole machine is in poor condition. , stable and flexible work in the electromagnetic environment.
u Support AC and DC voltage input, power supply Redundant power input supports DC 110V/220V, AC 220V/50Hz power supply, and uses hot-swappable redundant module power supply to support the continuous replacement of the whole machine and maintenance of module power supply.
u Multiple communication interfaces and flexible expansion of 6 USB2.0 interfaces, 6 Gigabit Ethernet ports, 10 isolated RS-232/422/485 serial ports, 1 VGA port, 1 MiniPCIE slot (USB not supported Device), 1 CFast card slot, 1 2.5-inch HDD interface (compatible with 1.8-inch SSD HDD), 1 user-defined function interface, configuration of each interface status indicator, accurate monitoring of the network, serial port, power supply and the entire Machine working status; At the same time, a user-oriented open I/O expansion slot facilitates users to select I/O modules according to their needs.
u Modular design The customer can configure the serial port function module according to the actual use situation, realize the flexible switch between RS-232/RS-422/RS-485 mode; reserve PCI-104 expansion card slot and bracket, the customer can configure industry functions Expansion card, function expansion through custom interfaces. (*Note: Expansion cards must be floating design); core board, serial module, and module power supply can be ordered separately.
u Power failure alarm function When power supply equipment fails to supply power or the power supply is interrupted due to various reasons, it can promptly and voluntarily issue an alarm signal to avoid the loss caused by the power failure of the equipment.
IV. Conclusion Subway PSCADA application professional grade product recommendation: EVOC SPC-8231
This article discusses the characteristics, structure and application of the integrated automation system for subway PSCADA integrated substation. The integrated substation integrated automation system is a systematic project. To realize the functions of all automated substation automation, there are many technical problems that need to be tackled and tackled. EVOC will combine the national development plan and the application requirements of the metro industry, and continuously introduce more professional products to meet the future. Smart grid automation system.
The ground construction of current urban rail transit includes AFC (automatic ticketing system), PIS (passenger information system), BAS (environmental monitoring system), FAS (fire and fire monitoring system), PSD (station screen gate system), PSCADA (power monitoring) And the data acquisition), MCS (main control system), SIG (signal system), NCS (network communication system) nine major systems, this article mainly discusses PSCADA system's demand, the structure and the application.
Second, the system requirements PSCADA (power monitoring and data acquisition) system: including the entire line from a number of integrated automation systems substation; SCADA (SupervisoryControlAndDataAcquisition) system, that is, data acquisition and monitoring and control systems. SCADA system is based on computer-based DCS and power automation monitoring system; it has a wide range of applications, can be applied to power, metallurgy, petroleum, chemical and other fields of data acquisition and monitoring control and process control and many other fields;
The subway power monitoring subsystem is tightly integrated with the integrated monitoring system (ISCS) of the metro industry to realize the functions of the PSCADA sub-system and to jointly complete the hierarchical real-time monitoring of the operation of the power supply equipment and the catenary (or rail) of the substation. Control and deal with various abnormal accidents and alarm events of the power supply system to ensure the normal operation of the system. At the same time, the degree of automation of dispatching, management and maintenance of the power supply system is greatly improved, the quality of power supply is improved, and the system is operated safely and reliably.
12kV Switchgear, 750V Switchgear, 0.4kV Switchgear, Traction Transformer, Silicon Rectifier, Distribution Transformer, Drainage Cabinet, Stray Current Monitoring Device, Traction Network Electric Isolation Switch, Subway Substation Integrated Automation System and Power Supply System The integrated monitoring and control protection device and intelligent acquisition device equipped with a regenerative energy utilization device, a rail potential limiting device, etc. are connected through a communication interface to realize centralized monitoring.
According to the requirements of the smart grid system, the requirements for controlling industrial computers are as follows:
u Passed four levels of certification by the State Power Research Institute of China, and complied with IEC61850-3 and IEEE1613 certification;
u power supply and interface to meet the requirements of surge 4-level immunity, electrostatic 4-level immunity;
u The power input supports DC 110V/220V, AC 220V/50Hz power supply, to meet the redundant power supply, to support the continuous replacement of the whole machine, and to maintain the power supply of the module; it is required to support the power failure alarm function;
u Supports multiple communication interfaces and flexible expansion (10 serial ports: Opto-isolated circuit design is used to achieve stable operation in harsh, complex and changeable electromagnetic environments; 6 network ports; 6 USB ports; 1 VGA port; 1 expansion slot);
u standard 19-inch shelves fanless, low power consumption, fully sealed products;
Third, the system description PSCADA system includes a number of substation integrated automation system across the line, the system can be divided into two categories:
u Traction and decompression mixed substation (hereinafter referred to as the mixing station)
u step-down substation (hereinafter referred to as step-down station)
The comprehensive automation system of the traction and decompression hybrid substation at the station and depot achieves data exchange between the power dispatch center and the integrated automation system of the substation through the interface with the integrated monitoring system of the station and the depot.
The substation automation system adopts a hierarchical and distributed system structure. The system consists of substation station level management, network communication layer, and spacing device layer. The system uses the power supply equipment as the monitoring object. The 10kV and 0.4kV AC protection and monitoring unit, the DC750V DC protection monitoring and control unit, the AC and DC system monitoring unit, the transformer and rectifier monitoring unit, the draining cabinet and the stray current monitoring unit, and the rails are located in the network. Potential-limiting devices, electrical isolation switches, and other distributed floor-level devices are connected and managed centrally through industrial computers.
The following figure shows the typical structure of the PSCADA system:
The station-level management consists of industrial control computers, communication processors, switches, and intelligent measurement and control units installed in the control signal panel. This layer mainly completes the functions of data communication processing, man-machine interface, and database of the entire station, and is the interface between the system and the operation and maintenance personnel.
u Data communication station station control level network Interval level network u Space equipment layer Space layer intelligent equipment mainly includes 10kV comprehensive protection monitoring and control unit, 750V DC switchgear protection and monitoring unit, 0.4kV low voltage switchgear monitoring unit, braking energy consumption monitoring unit , stray current monitoring unit, rectifier monitoring unit, AC and DC power system monitoring unit, rectifier transformer thermostat, power transformer thermostat, all smart devices by communication access integrated automation system.
The professional sealed industrial computer SPC-8231 in the Yanxiang Power Industry Co., Ltd. is mainly responsible for the statistical processing of operating data and status records in the subway PSCADA system; data information layering and diversion exchange automation control; and the fault alarm function can be provided immediately when the substation operation fails. Fault problems and so on.
The new SPC-8231 product of EVOC meets the important indexes of metro PSCADA equipment application:
(Figure 3: SPC-8231)
u Through the State Electric Power Institute's four-level power certification, in line with IEC61850-3 and IEEE1613 certification IEC61850-3 certification to ensure the anti-electromagnetic interference capability of network equipment used in substations, IEEE1613 standard clarifies the standard environment and test of communication interconnection equipment. Claim. With IEC61850-3 and IEEE1613 professional certification, it can communicate with different devices in the substation.
u Meet the EMC index of the power industry. The power supply and interface have high EMC performance such as 4-level surge immunity and 4-level static immunity, meet the insulation performance requirements in the industry, and the serial port adopts electronic isolation design to realize the whole machine is in poor condition. , stable and flexible work in the electromagnetic environment.
u Support AC and DC voltage input, power supply Redundant power input supports DC 110V/220V, AC 220V/50Hz power supply, and uses hot-swappable redundant module power supply to support the continuous replacement of the whole machine and maintenance of module power supply.
u Multiple communication interfaces and flexible expansion of 6 USB2.0 interfaces, 6 Gigabit Ethernet ports, 10 isolated RS-232/422/485 serial ports, 1 VGA port, 1 MiniPCIE slot (USB not supported Device), 1 CFast card slot, 1 2.5-inch HDD interface (compatible with 1.8-inch SSD HDD), 1 user-defined function interface, configuration of each interface status indicator, accurate monitoring of the network, serial port, power supply and the entire Machine working status; At the same time, a user-oriented open I/O expansion slot facilitates users to select I/O modules according to their needs.
u Modular design The customer can configure the serial port function module according to the actual use situation, realize the flexible switch between RS-232/RS-422/RS-485 mode; reserve PCI-104 expansion card slot and bracket, the customer can configure industry functions Expansion card, function expansion through custom interfaces. (*Note: Expansion cards must be floating design); core board, serial module, and module power supply can be ordered separately.
u Power failure alarm function When power supply equipment fails to supply power or the power supply is interrupted due to various reasons, it can promptly and voluntarily issue an alarm signal to avoid the loss caused by the power failure of the equipment.
IV. Conclusion Subway PSCADA application professional grade product recommendation: EVOC SPC-8231
This article discusses the characteristics, structure and application of the integrated automation system for subway PSCADA integrated substation. The integrated substation integrated automation system is a systematic project. To realize the functions of all automated substation automation, there are many technical problems that need to be tackled and tackled. EVOC will combine the national development plan and the application requirements of the metro industry, and continuously introduce more professional products to meet the future. Smart grid automation system.
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