Configuration of Last Breaker Trip Function for Chongqing-Hubei Back-to-Back HVDC Project

doi:10.11930/j.issn.1004-9649.201607042

Abstract

Abstract: The removal of all AC lines and load shedding of inverter station in flexible HVDC system will cause overvoltage at the DC side and other parts in inverter station, which may endanger the safety of primary equipment. Therefore, the configuration of last breaker trip function in inverter station is very necessary. In this paper, based on the Chongqing-Hubei back-to-back HVDC project, a configuration scheme of last breaker trip function for flexible HVDC system is proposed, and is verified by RT-LAB real-time simulation platform which is integrated to the control and protection system and operators monitoring system. The results show that the configuration of last breaker trip function can ensure the locking of converter valves before tripping of the AC circuit breaker or before the DC voltage increasing to the protective setting value so as to avoid serious overvoltage at both AC and DC sides.

Key words: flexible HVDC, last breaker, overvoltage and protection, RT-LAB, real-time simulation

CLC Number:

TM72

ZHANG Qun, ZHAO Qian, HAO Junfang, YAN Bing, CHEN Peng, KONG Lingkai. Configuration of Last Breaker Trip Function for Chongqing-Hubei Back-to-Back HVDC Project[J]. Electric Power, 2017, 50(9): 72-76.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201607042

https://www.electricpower.com.cn/EN/Y2017/V50/I9/72

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