断路器异步动作时的直流配电系统故障特性分析
摘要:随着各种可再生能源的快速发展和用户对电能质量的要求不断提高，直流配电网的理论研究和实际应用受到了国内外学者的广泛关注。在构成直流配电网的关键设备中，直流断路器在直流配电系统的安全、灵活运行中发挥着重要作用。由于直流配电系统的断路器之间存在一定的距离，当系统故障时，线路首末段及正负极的断路器可能发生异步动作。为此，设计一种三端口的直流配电网络，通过换流器和直流断路器的协调动作，实现了换流站的直流故障穿越。分析了动作时差和线路长度对直流断路器动作特性的影响，随着动作时差的增加，先动断口释能增加，后动断口释能减少；随着电缆线路长度的增加，断口释能略微增加，基本保持不变。
Abstract：With the rapid growth of various renewable energy integration and the increase of consumers' demands on power quality, special attentions are paid to the development of DC distribution network both on theory research and practical applications. Among the key equipment in DC distribution network, DC circuit breaker shows its significant role for DC distribution system's safe and flexible operation. DC circuit breakers in distribution system are deployed among power lines with a distance, so the asynchronous switching might occur in the circuit breakers at the initating and ending terminal of line and the positive and negative pole. Therefor, this paper designs a DC distribution network with three terminals, in which the DC fault ride-through of converter station is realized via the coordination of converters and DC circuit breakers. The impact of DC circuit breakers caused by operation time difference and cable length is analyzed. With the increase of operation time difference, the release energy of first action DC circuit breaker will increase, and the latter will reduce. With the increase of cable length, the release energy of DC circuit breaker will increase slightly.
标题：断路器异步动作时的直流配电系统故障特性分析
title:Fault Characteristics Analysis of DC Distribution System With Circuit Breaker Operating Asynchronously
作者：张威, 曾杰, 李海波, 张弛, 谢宁, 徐琪, 梅成林, 裴星宇, 郭宗宝
authors:ZHANG Wei, ZENG Jie, LI Haibo, ZHANG Chi , XIE Ning, XU Qi, MEI Chenglin, PEI Xingyu, GUO Zongbao
关键词：直流断路器,直流故障穿越,非同期性开关,
keywords:DC circuit breaker,DC fault ride-through,asynchronous switching,
发表日期：2018-09-27
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