A remote test method for power grid security and stability control system and its engineering application

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.

Research and application of power communication network terminal based on 5G technology

“…In the distribution network differential protection scenario based on 5G technology, the communication between protection devices has strict requirements on delay and packet loss rate. Tests to verify the performance of the 5G network to the differential protection requirements of the distribution network are various, such as using testing tools such as network analyzers, or network testing software such as IxChariot [10] . However, the scheme using the network analyzer and other test tools needs to increase the test instruments, build a complex test environment, and require additional expenses for the purchase of test instruments.…”

Remote closed-loop simulation method for stability control system based on 5G network

“…(5) Stability control strategy action signal, 4 bytes in total (6) Spare 14 bytes (7) Data checksum: The inverse of the sum of items ( 4), (5), and ( 6), 2 bytes.…”

“…Therefore, this study proposes a remote closed-loop simulation method and system for stability control systems based on the 5G network. By using commercial 5G networks to carry closed-loop simulation test data and action signals of stability control systems, the laboratory Closed-loop simulation system can achieve closed-loop testing of stability control devices distributed on site, The communication implementation method is simple, the investment cost is low, the process is simple, and the current stability control on-site joint debugging method has been optimized and improved [6][7][8][9][10].…”

Remote closed-loop test method of safety and stability control system based on step-by-step implementation

“…Literature [5][6][7][8] firstly proposed a simulation platform based on real-time digital simulation system and used real-time simulation modeling technology of large power grids for functional testing of safety and stability control systems to realize closed-loop testing of action reliability and strategy execution effectiveness of safety and stability control devices, but laboratory testing is difficult to effectively guide field testing. On this basis, literature [9][10] proposed a remote testing method based on real-time simulation, which mainly focuses on the verification of the correctness of the stability control strategy, but the method requires hardware and software modification of the safety and stability control device; meanwhile, in order to realize real-time closed-loop control, a supporting signal conversion device needs to be added in the laboratory and a dedicated communication network with high real-time capability needs to be deployed. In the literature [11], based on the recording and playback technology, multiple testers are proposed to realize the overall testing of the safety and stability control system after time-to-time networking, but the network conditions are limited to the operation and action information collection of the stability control device itself, which can only realize off-line open-loop testing, and the application scenarios are laboratory or small-scale safety and stability control system testing, which is difficult to be applied in cross-regional multi-plant station joint commissioning projects.…”