| 引用本文: | 许勇,牛永会,郭宁明,等.新型输电线路故障测距系统的研制[J].电力系统保护与控制,2014,42(12):119-125.[点击复制] |
| XU Yong,NIU Yong-hui,GUO Ning-ming,et al.Development of the new fault location system based on Qnet[J].Power System Protection and Control,2014,42(12):119-125[点击复制] |
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| 摘要: |
| 针对传统行波故障测距装置存在的一些问题，如采样率低造成直流线路故障不启动、不同厂家设备间数据无法共享、不能满足智能变电站接入等，提出并实现了一种设备间基于Qnet协议的新型行波故障测距系统。相对于传统行波故障测距系统，该系统采用超高采样频率、支持分布式接入，显著提高了测距装置接入的灵活度；对外通信协议全面满足IEC61850要求，数据存储格式采用comtrade标准格式，便于数据共享；用多尺度分析替代了传统的主导频带分析。模拟试验证明，该算法可深度优化测距结果，有效提高测距精度。 |
| 关键词: 行波 故障测距 超高速采样 Qnet 测距算法 智能变电站 |
| DOI：10.7667/j.issn.1674-3415.2014.12.019 |
| 投稿时间：2013-09-02修订日期：2013-10-31 |
| 基金项目: |
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| Development of the new fault location system based on Qnet |
| XU Yong,NIU Yong-hui,GUO Ning-ming,SUN Ai-chun,Lü Da-wei,FENG Zhi-chang,ZHENG Guo-tai |
| (State Grid Electric Power Research Institue, Nanjing 210061, China) |
| Abstract: |
| The traditional fault location system has some problems, for example, insufficient sampling rate result in not trigging on DC line when fault happens, can’t support distributed installation and communication protocol conform to IEC61850 standard in smart substation, and the data can’t be shared between different manufacturers. A new type of fault location system based on Qnet protocol is introduced. The new fault location system has extreme high sampling rate, saves the fault data using comtrade style and accords with the IEC61850 standard, so the data can be easily shared. It is proved through test that the fault location precision is improved largely by using the multi-scale analysis algorithm. |
| Key words: wave fault location extreme high sampling Qnet fault location algorithm smart substation |
