Implementation Analysis of Automation System of Nanyang 500kV Baihe Substation

Abstract: The implementation and analysis information of the automation system of Nanyang 500kV Baihe Substation is provided by the excellent manufacturers of flowmeters and flowmeters. 0 Introduction Nanyang 500kV Baihe Substation is the first ultra-high voltage substation to realize comprehensive automation in Henan Province. Based on the engineering design and on-site debugging, this paper expounds the design characteristics of the substation automation system, and finds out in the debugging process. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the implementation analysis article of the automation system of Nanyang 500kV Baihe Substation. 0 Introduction Nanyang 500kV Baihe Substation is the first ultra-high voltage substation to realize comprehensive automation in Henan Province. Based on the engineering design and on-site debugging, this paper expounds the design characteristics of the substation automation system, and puts forward some useful suggestions for the problems found in the debugging process. 1 Project Overview Nanyang 500kV Baihe Substation is located in Hongniwan Town, Nanyang City, Henan Province. The completion of the substation can improve the structure of the 500kV main network and improve the reliability of power supply. It is the hub for power exchange in the Central China Power Grid. The final scale of the station is the main transformer 2×750MVA, 8 circuits of 500kV outlet, 12 circuits of 220kV outlet, high voltage shunt reactor 3X50Mvar, 35kV side connected to the power and reactive power compensation device. 500kV adopts 3/2 connection, 220kV is double bus section, 35kV is single bus connection. 2 Design features Nanyang 500kV Baihe Substation is an ultra-high voltage hub substation and will be built in phases. In order to ensure the safety and reliability of its automation system operation, reduce the difficulty, complexity and system downtime during expansion, and ensure the reliable operation of the system during expansion, the automation system engineering design has the following characteristics. 2.1 Double configuration of network structure and operator workstation The ultra-high voltage substation has strict requirements on the monitoring and control operation of the running equipment in the station [1]. The status, parameters and station-level control operation commands of the operating equipment in the station are all transmitted by means of the network. Therefore, the station control layer of the Baihe Substation Automation System adopts a redundant design, which is configured according to dual Ethernet, and is a hot standby for each other. Mode operation, dual operator workstations are set up at the station level, and each operator workstation is equipped with dual monitors. The two operator workstations work simultaneously in master-slave mode, but only the master can issue control output commands. The manual switching time between master and slave is less than 1s, and the automatic switching time in case of failure is less than 10s. In addition, the station management machine and the engineer station are also configured to strengthen the management of the equipment in the station. 2.2 Dualization of telecontrol information transmission The automation system of Baihe substation has two main and standby telecontrol information channels. The two telecontrol master stations operate in the master-standby mode, and the telecontrol information is respectively transmitted to the two telecontrol master stations through the network and direct mining and direct transmission. In the direct mining and direct delivery mode, the telecontrol information is directly transmitted from the bay layer to the telecontrol master station through the optical fiber, which ensures that even if the station control layer fails, the telecontrol information of the substation can still be transmitted to the dispatcher. 2.3 Powerful measurement and control unit Ultra-high voltage substation has many voltage levels, large scale, and a large number of primary equipment and secondary equipment. The DC system and control system are also much more complicated than medium and low voltage substations. Huge number. The position of the information acquisition unit and the I/O measurement and control device of the control operation command is particularly important in the ultra-high voltage substation. This site selects the latest 6MB524 series measurement and control unit of German Siemens provided by Sino-German Company of Nanjing Electric Power Automation Research Institute. Its operation is very stable, and its event recording resolution can reach 1ms, the remote measurement accuracy can reach 0.2%, and the frequency accuracy can reach 0.001Hz. Different models need to be reasonably selected for specific projects, and advanced functions such as synchronous closing of circuit breakers, anti-misoperation interlocking of isolating knife switches and grounding switches, and automatic switching of backup power supply can be realized, and the primary wiring diagram of the unit can be displayed in real time, so that at intervals It is more convenient and intuitive to control the layer. 6MB524 has complete and reliable synchronous closing detection and control operation functions. The synchronous closing of all 500kV and 220kV circuit breakers is completed by the corresponding interval 6MB524 measurement and control units, which not only reduces equipment investment, but also avoids the repeated configuration of hardware devices. , but also simplifies the secondary circuit. The stand-by power supply self-switching logic is realized by the 6MB5515 main unit of the bay layer. The logic of the backup self-switching function is perfect, which ensures that the backup power supply is correctly switched on after the working power supply is disconnected.

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