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The Application of Runpower PLC Controller in Metro Power Supply System
The construction and operation of a large number of subways and trams have brought convenience for citizens to travel. At the same time, the safe, stable, and reliable operation of subways has become the focus of attention.
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The power supply control system in metro railways often utilizes Programmable Logic Controllers (PLCs) for efficient and reliable operation. PLC control systems play a vital role in managing the power supply infrastructure of metro networks. They are responsible for monitoring and controlling various components, including the traction power system and station power supply. Runpower PLC programmable logic controllers are used on many occasions, among which the subway DC power supply traction system is an important part of the subway operation, providing a guarantee for the safe and reliable operation of the subway.
Project Background
PLC SYSTEM APPLICATION PROJECTS OVERVIEW
Runpower plc system successfully applied in the Metro power supply control system for Beijing city in China, which is the subway DC power supply traction system. Metro power supply system is generally divided into external power supply, main substation, traction power supply system, power monitoring system, and other parts.​
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External power supply
The external power supply of the metro power supply system is the external urban power supply supplied by the main substation of the metro power supply system. Usually, two circuit power supply is introduced separately from the 110 kV side of the urban power grid.
Main substation
The main substation receives the high-voltage power supply (usually 110kV) from the urban network and provides the traction substation and step-down substation with medium voltage power supply (usually 35kV or 10kV) through step-down.
Traction power supply system
The function of the traction power supply system is to convert AC medium voltage (usually 35kV or 10kV) into DC 1500V or DC 750V through step-down rectification to provide traction power for metro trains. The system includes a traction substation and traction network, and the traction network includes a catenary and return network. The catenary is suspended by overhead catenary (DC 1500V) and conductor rail (DC 1500V or 750V).
The applications of Runpower plc programmable logic controller meet the requirements of 750V/1500V subway and tram DC traction power supply systems, as well as other special DC traction power supply systems. PLC controllers are used to monitor the operation status of equipment, upload in time in case of failure, and alarm or trip according to the fault level to ensure normal power supply of track. For example, Runpower PLC control panel is applied to the rectifier cabinet device. The PLC systems monitor the diode status, collect the internal temperature, overtemperature tripping, fault, and other input signals of the rectifier cabinet, protect the rectifier cabinet of the track power supply device, display the equipment operation status through the touch screen, and uploads it to the central control system through the RS485 interface.
Power Monitoring System
The function of the power monitoring system is to collect and monitor remote data of subway substations and contact network equipment in real-time. In the control center of urban rail transit, carries out four-remote controls of the main electrical equipment through the dispatching terminal, communication channel, and comprehensive automation system of a substation, to realize the operation scheduling and management of the whole power supply system.
The main body of Runpower plc controller is equipped with a multi-channel serial port, which can communicate with the power monitoring system through the serial port or network port. The internal serial port of the plc control boards is isolated, and the network port is equipped with network protection, which has a strong anti-interference ability to ensure stable and reliable communication.
PLC Control Panel Setting for a Rectifier Device
The Metro power supply system total I/O account: DI 46, DO 10, AI 4, and communicate with 3rd party equipment through 1-way RS232, and 1-way RS485. RPC2000 PLC modules setting for rectifier device as following:
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PLC System Architecture
PLC System Characteristics
Runpower PLC controller is applied to the DC traction system of subway and tram, with the following characteristics:
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(1) to adapt to the harsh environment; subway construction, operation, the site environment is relatively harsh, such as the subway construction phase of dusty, humid environment, etc
(2) High reliability and fast response; When metro is used, PLC automation system shall be reliable and fast in response, and slow response to failure, no response to failure, false alarm, etc. are not allowed;
(3) Large number of application sites; Runpower PLC programmable logic controller is currently widely used in the metro traction power supply system, which can operate stably and reliably for a long time;
Site Pictures of Runpower PLC programmable Logic Controllers
PLC projects -Typical PLC Applications for Metro Automation industry
(1) Beijing Subway.
(2) Beijing Trams.
(3) Qingdao Metro.
(4) Qingdao Tramway.
(5) Wuhan Metro.
(6) Mengzi light rail, etc.
Runpower PLC RPC2000
Runpower PLC RPC2000 is a micro PLC, which is an all-in-one compact programmable logic controller, which is developed based on many years of PLC industry applications, It is a marketing proved PLC system of high-performance, premium-quality, and high compatibilities, it is the best choice of equipment supporting and small automation engineering control products. With faster running speed, larger storage space, and significantly improved performance, the RPC2000 micro PLC can meet the diverse needs of end users in various industries. With multiple PLC communication protocols MODBUS TCP, MODBUS RTU, and Profibus DP, Runpower PLC programmable logic controller can interface the most of the equipment and instruments in the market.
RUNPOWER PLC system is a Codesys plc, which can be programmed with Codesys version 3, which compliance with industrial standard IEC 61131-3 support programming languages ST, IL, LD, FBD, SFC, and CFC, allows programmers all over the world work with it easily and comfortably.
OUR PRODUCTS
CHITIC RPC2000 PLC tools for programming and configuration is the CODESYS, Codesys is an industry-standard software solution for control and automation systems, it offers a powerful and efficient Windows-based integrated development environment for engineering tasks such as hardware configuration, programming, and system diagnosis. With a range of programming languages compliant with the IEC61131-3 standard, including LD, FBD, IL, ST, SFC, and CFC, it provides a flexible and versatile solution for automation tasks.
Codesys Soft PLC
Industries Served
RUNPOWER PLC has been applied in a wide range of industries and automation processes, including those mentioned above such as coal mining, public railway automation, metal processing, water treatment, Heating, ventilation and air conditioning (HVAC) industry, heating industry, transformer substations, smart factories, and so on.
ABOUT US
Runpower is a high-tech enterprise in automation industries, specializes in a multitude of core technologies including computing, communication, signal processing, embedded software, system monitoring software, industrial internet, and automatic control. Renowned for our RPC3000 series PLC, RPC2000 series PLC, and various specialized automation products, our solutions find widespread applications across industries such as coal, metallurgy, power, petrochemicals, municipal services, transportation, environmental protection, construction, water conservancy, and agriculture. Emphasizing independently developed automation products and an in-depth understanding of industry applications, Runpower offers comprehensive automation solutions encompassing system planning, design, product development, and technical services. Leveraging our technological strengths, we foster deep collaboration with clients and partners, collectively enhancing competitive advantages within the industry chain. Committed to delivering high-quality products and efficient services, we strive for sustainable and healthy company growth, continuously elevating core competitiveness and brand value. Awarded the title of "Top Ten Emerging Companies in China's Automation Field" by the China Automation Society in 2016 and listed in the Ministry of Industry and Information Technology's comprehensive application program for Programmable Logic Controllers (PLC) in the Industrial Foundation Strengthening Project in 2018, Runpower possesses a rich technical background and extensive work experience in product development, production management, quality control, market promotion, industry application, and technical services. Learn more