The Analysis of the Opto-Couplers Relay Malfunctions in HVDC Control and Protection and the Improvements of the Trip Circuits

Abstract:

Due to the voltage surge and transient disturbances can cause malfunctions of the opto-couplers relay (OCR) easily, which will lead the HVDC to stop working, an optimized project to the trip circuits of HVDC control and protection is proposed. Firstly, the problems of current trip circuits are analyzed. Secondly, the trip circuits of the AC filters and DC filters are improved, as well as the DC protective trip circuits. Finally, choose other relays with better performance and more reliable to instead of the current ones, and improve the stripping link circuits of the DC filter group. The optimized project was used in the Zhaoqing converter station successfully, which is under good operating condition now.

• Periodical: Advanced Materials Research (Volumes 354-355)
• Pages: 1216-1219
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.354-355.1216
• Online since: October 2011
• Authors: Wei Ming Guo, Gan Qing Zuo, Rui Lin
• Keywords: HVDC, Malfunction, Opto-Couplers Relay (OCR), Protection, Trip Circuits, Tripping Link

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