Abstract
Security and stability control (SSC) system or special protection system (SPS) is an important means to ensure the safe operation of power grid. In view of the insufficiency that the current open-loop testing method cannot fully test the SSC system on-site, a remote real-time closed-loop test method is proposed. The solutions of key techniques such as information interaction, remote communication and signal conversion in remote test system are studied. Then the platform architecture and standard interface of the remote test system are designed. A remote test platform for SSC system is developed, and there application modes of the platform is deeply analysed. Finally, taking SSC system of Yunnan AC power outgoing grid as pilot application, experiment of two substations on-site is carried out. The results in practical project further prove the effectiveness of the method presented in this paper.
Highlights
With the construction of UHV(Ultra-High Voltage) power grid and the large application of new energy power, HVDC(High Voltage Direct Current Transmission) and power electronic devices[1], the scale and complexity of power system are increasing day by day, which brings more and more severe challenges to the security and stability of power system[2]
In view of the above shortcomings, this paper proposes a remote test method for power grid security and stability control system, which uses the field Security and stability control (SSC) and the existing electric power communication network, carries out large-scale joint simulation test of the field SSC in the laboratory environment
Transmission rate: compatible with the channel receiving and transmitting rate of the existing SSC, the data with high real-time requirements is designed as 600 frames/s; the data with relatively low realtime requirements are designed with time-sharing multiplexing, which can be designed as 150 frames/s, and the frame protocol adopts strict mechanism to ensure the reliability of the data transmission; the communication frame length is 28bytes, which can ensure that network storm will not occur and affect other services of transmission network
Summary
With the construction of UHV(Ultra-High Voltage) power grid and the large application of new energy power, HVDC(High Voltage Direct Current Transmission) and power electronic devices[1], the scale and complexity of power system are increasing day by day, which brings more and more severe challenges to the security and stability of power system[2]. As open-loop test, the test environment of the traditional method has a large gap with the real power grid[5], which cannot investigate the operation characteristics of the SSC strategy after the fault and the response characteristics of the power grid. In view of the above shortcomings[6], the reference [7,8] proposed a test system based on real-time digital simulation technology in closed-loop, and carried out field debugging. In view of the above shortcomings, this paper proposes a remote test method for power grid security and stability control system, which uses the field SSC and the existing electric power communication network, carries out large-scale joint simulation test of the field SSC in the laboratory environment. The feasibility and availability of the remote test method has been proved via carrying out the test of an existing field SSC by real time simulation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
