1. System overview

With the gradual acceleration of the urbanization process, my country’s urban rail transit construction has great potential for future development. (The State Council has approved three indicators for subway construction—the urban population exceeds 3 million, the GDP exceeds 100 billion yuan, and the general budget revenue of local finance exceeds 10 billion yuan. At present, nearly 50 cities across the country meet the standards.) With the increase of investment quota, urban rail transit construction is expected to become a new investment hotspot following the large-scale investment in railways. Urban rail transit will become the upstart investment in infrastructure during the “Twelfth Five-Year Plan” period. my country’s urban rail transit construction is expected to usher in golden period of development.

At present, the ground construction of urban rail transit includes AFC (Automatic Fare Collection System), PIS (Passenger Information System), BAS (Environmental Monitoring System), FAS (Fire Monitoring System), PSD (Station Screen Door System), PSCADA (Power Monitoring System) and data acquisition), MCS (main control system), SIG (signal system), NCS (network communication system) nine systems, this paper mainly discusses the requirements, architecture and application of PSCADA system.

2. System Requirements

PSCADA (Power Supply Supervisory Control and Data Acquisition) system: including the integrated automation system of several substations on the whole line; SCADA (Supervisory Control And Data Acquisition) system, namely data acquisition and monitoring control system. SCADA system is a computer-based DCS and power automation monitoring system; it has a wide range of applications, and can be used in data acquisition and monitoring control and process control in electric power, metallurgy, petroleum, chemical and other fields;

The power monitoring subsystem of the subway industry is closely integrated with the integrated monitoring system (ISCS) of the subway industry to realize the functions of the PSCADA subsystem, and jointly complete the hierarchical distribution of the main power supply equipment of the substation and the operation of the catenary (rail) and other power equipment. Remote real-time monitoring and monitoring. Control, deal with various abnormal accidents and alarm events of the power supply system, ensure the normal operation of the system, and greatly improve the automation of power supply system scheduling, management and maintenance, improve the quality of power supply, and ensure the safe and reliable operation of the system.

12kV switchgear, 750V switchgear, 0.4kV switchgear, traction transformer, silicon rectifier, distribution transformer, drain cabinet, stray current monitoring device, traction network electric isolation switch, The integrated monitoring and control protection device and the intelligent acquisition device configured with the regenerative energy utilization device, the rail potential limiting device, etc. are connected through the communication interface to realize centralized monitoring.

According to the requirements of the smart grid system, the requirements for the control IPC are as follows:

u Passed the four-level electric power certification of the State Electric Power Research Institute, in line with IEC 61850-3 and IEEE 1613 certification;

u The power supply and interface meet the requirements of surge immunity level 4 and static immunity level 4;

u Power input supports DC 110V/220V, AC 220V/50Hz power supply, to meet the redundant power supply, support the whole machine to replace and maintain the module power supply without power; it is required to support the power loss alarm function;

u Support a variety of communication interfaces and flexible expansion (10 serial ports: using optoelectronic isolation circuit design, the whole machine can work stably in harsh, complex and changeable electromagnetic environment; 6 network ports; 6 USB; 1 VGA; 1 expansion slot);

u Standard 19-inch shelf-free, low-power, fully-sealed products;

3. System description

The PSCADA system includes a comprehensive automation system consisting of several substations on the whole line. The system can be divided into two categories:

u Traction step-down hybrid substation (hereinafter referred to as hybrid station)

u Step-down substation (hereinafter referred to as the step-down station)

The integrated automation system of the traction step-down hybrid substation in the station and depot realizes the 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 depot.

The substation automation system adopts a layered and distributed system structure. The system consists of substation station-level management layer, network communication layer, and interval equipment layer. The system takes the power supply equipment as the monitoring object, and connects the 10kV, 0.4kV AC protection measurement and control unit, DC750V DC protection measurement and control unit, AC/DC system monitoring unit, transformer and rectifier monitoring unit, drain cabinet and stray current monitoring unit, rail monitoring unit through the internal network. Potential limit devices, electric isolation switches and other discretely arranged spacer layer equipment are connected, and centralized management is carried out through the industrial computer.

The following figure shows the typical structure of PSCADA system:

(Figure 1: Typical structure of PSCADA system)

u Station level management

It consists of industrial computer, communication processor, switch, intelligent measurement and control unit installed in the control signal panel. This layer mainly completes the data communication processing, man-machine interface, database and other functions of the whole station, and is the interface between the system and the operation and maintenance personnel.

u data communication layer

station control network

bay level network

u spacer layer

The intelligent equipment on the bay layer mainly includes 10kV comprehensive protection measurement and control unit, 750V DC switchgear protection measurement and control unit, 0.4kV low-voltage switchgear monitoring unit, braking energy consumption device monitoring unit, stray current monitoring unit, rectifier monitoring unit, AC and DC power supply system Monitoring unit, rectifier transformer thermostat, power transformer thermostat, all intelligent devices are connected to the integrated automation system by communication.

The professional-grade fully sealed industrial computer SPC-8231 of EVOC power industry is mainly responsible for the statistical processing of operation data and status records in the PSCADA system of the subway; data information layering, automatic control of shunt exchange; it can provide fault alarm function in real time when the substation operation fails, pointed out that trouble spots, etc.

EVOC brand newSPC-8231Product compliant with MetroPSCADAImportant indicators of equipment application:

(Figure 3: SPC-8231)

u Passed the four-level certification of electric power of the State Electric Power Research Institute, in line with theIEC 61850-3andIEEE1613Certification

The IEC 61850-3 certification guarantees the immunity to electromagnetic interference of network equipment used in substations, and the IEEE 1613 standard clarifies the standard environment and testing requirements for communication interconnect equipment. Professionally certified according to IEC 61850-3 and IEEE 1613, able to communicate with different equipment in the substation.

u Meet the power industryEMCindex

The power supply and interface have high EMC performance such as surge level 4 immunity and static electricity level 4 immunity, and meet the requirements of insulation performance in the industry. Stable work in the environment.

u Support AC and DC voltage input, power supply redundancy

The power input supports DC 110V/220V, AC 220V/50Hz power supply, and adopts hot-swappable redundant module power supply, which supports the replacement and maintenance of the module power supply without interruption of the whole machine.

u Various communication interfaces and flexible expansion

6 USB 2.0 ports, 6 Gigabit Ethernet ports, 10 isolated RS-232/422/485 serial ports; 1 VGA port, 1 MiniPCIE slot (does not support USB devices), 1 CFast card slot, 1 2.5-inch hard disk interface (compatible with 1.8-inch SSD hard disk), 1 customer-defined function interface; configure each interface status indicator, which can accurately monitor the network, serial port, power supply and the working status of the whole machine; at the same time, 1 is open to users The industrial I/O expansion slot is convenient for users to choose 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 to realize the flexible switching of RS-232/RS-422/RS-485 mode; reserve the PCI-104 expansion card slot and bracket, the customer can configure the industry function expansion card, Define the interface to realize the function extension. (*Note: The expansion card must be of floating design); the core board, serial port module, and module power supply can be ordered separately.

u Power failure alarm function

When the power supply of the electrical equipment fails or is interrupted due to various reasons, it can timely and actively issue an alarm signal to avoid the loss of the equipment due to power failure.

4. Conclusion

subwayPSCADAApplication professional product recommendation: EVOCSPC-8231

This paper discusses the characteristics, structure and application of the integrated automation system of the subway PSCADA integrated substation. The integrated substation automation system is a systematic project. To realize the automation functions of all automated substations, there are still many technical problems that need to be solved. EVOC will combine the national development plan and the application needs of the subway industry to continuously introduce more professional products to meet the future. Smart grid automation system.

Attachment 1:

Smart grid professional low power consumption fanless product SPC-8231

u product description

SPC-8231 is a dedicated product for the power industry and for future digital substations. It strictly follows the IEC61850 standard and the special requirements of digital substations. It can provide an ideal communication solution for harsh industrial application environments such as substations and power plants. It can be widely used in substation telecontrol terminal management, smart grid dispatching communication management machine and subway power monitoring system (PSCADA).

u Main features

◆Onboard [email protected] ATOM™ D525 1.8GHz processor;

◆Onboard 2.0GDDRⅢ memory, maximum support 2.0G memory;

◆Support 6 RJ45 10/100/1000 network interfaces;

◆Support 10 serial ports, RS232/485/422 modules are optional, adopt optoelectronic isolation design, with 2.5KV isolation protection;

◆Support pluggable 110/220VCDC 100W dual power redundant power supply, and support power failure alarm function;

◆It can pass the level 4 certification of China Electric Power Research Institute, which is suitable for the requirements of electric power automation for harsh environments;

u Detailed specifications

u

Product size chart

u Ordering Information