| 引用本文: | 田培涛,黄金海,吴庆范,等.直流滤波器保护关键问题的研究[J].电力系统保护与控制,2015,43(18):144-149.[点击复制] |
| TIAN Peitao,HUANG Jinhai,WU Qingfan,et al.Study on the key problems of DC filter protection[J].Power System Protection and Control,2015,43(18):144-149[点击复制] |
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| 摘要: |
| 在分析直流滤波器的结构及测点配置、直流滤波器保护系统的配置策略和保护功能的配置策略的基础上，对目前特高压工程中直流滤波器保护存在的关键问题进行研究并提出建议和优化方案。对于直流滤波器高低侧电流CT暂态特性不一致导致保护误动的问题，建议采用新的直流滤波器差动保护判据，并在高低压侧采用光CT测量装置。针对模拟量故障导致三取二逻辑出口策略可靠性降低的问题，提出了一种新的三取二逻辑出口策略。利用RTDS对高压电容器C1内部接地故障进行了仿真分析，给出了一种新的保护功能判据和定值建议。通过对以上关键问题的研究，为后续高压直流工程中的直流滤波器保护的设计提供有益的参考。 |
| 关键词: 高压直流 配置策略 三取二 RTDS仿真 可靠性 |
| DOI：10.7667/j.issn.1674-3415.2015.18.023 |
| 投稿时间：2014-12-18修订日期：2015-01-19 |
| 基金项目: |
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| Study on the key problems of DC filter protection |
| TIAN Peitao,HUANG Jinhai,WU Qingfan,ZHANG Ailing,YUE Xiaoge,SONG Yantao |
| (XJ Electric Co., Ltd., Xuchang 461000, China) |
| Abstract: |
| Based on the analysis of the structure of DC filters, measuring point arrangement, protection system of DC filters and protection configuration strategy of protection function, the key problems in current DC filter protection of UHVDC are studied, and the corresponding suggestion and optimization scheme are given. For the protection misoperation caused by the inconsistent transient characteristics of DC filters high side and low side CT current, using the new DC filter differential protection criterion and installing optical CT measuring device in the high side and low side are suggested. Aiming at the low reliability of “selecting 2 from 3” logic export strategy caused by analog fault, a new “selecting 2 from 3” logic export strategy is proposed. The high voltage capacitor C1 internal grounding fault is simulated and analyzed by using RTDS, and a new protection function criterion and setting value suggestions are given. Study on these key problems provides a useful reference for the design of DC filter protection in the subsequent HVDC project. |
| Key words: HVDC configuration strategy selecting 2 from 3 RTDS simulation reliability |
