基于证据理论融合的广域后备保护新方法

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摘要为降低广域后备保护（WABP）通信流量,提高信息出错或丢失情况下保护决策的正确性,提出一种基于证据理论融合的WABP新算法。该算法在电网发生故障后,各子站首先根据启动元件动作情况和本站故障电流的分布特性,向主站上传站内少量线路的电流信息。然后,主站通过群体比幅识别候选疑似故障线路,并向相关子站索取故障疑似线路的保护信息域内的传统保护动作信息,采用改进的证据理论方法对相关信息进行融合判断,进而识别实际故障线路。仿真实例表明,该WABP算法具有采样同步要求低、广域通信流量小、在局部信息错误或丢失时仍能正确决策等良好性能。

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	陈国炎
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关键词 ：广域后备保护, 电流故障分布特性, 电流故障分量群体比幅, D-S证据理论

Abstract：In order to reduce the communication traffic of wide-area backup protection(WABP) and improve the correctness of its decision-making in the case of information wrong or missing, the paper proposes a new algorithm of WABP based on the evidence theory fusion. After power grid is fault, each substation uploads only a small amount of lines’current information according to action case of start element of line and distribution characteristics of fault component current of power grid. The current information which is compared by master substation to identify a few candidate suspiciously fault lines. Then master station obtains traditional protection information from therelevant substations of protection information domain of the suspected fault line. Master substation identifies the actual fault line by evidence theory fusion with the traditional protection information. The simulation examples show that the new WABP algorithm has the excellent performance of low sampling synchronization requirement, small wide area communication traffic, and correct decision even when some of information are wrong or missing.

Key words： Wide area backup protection distribution characteristics of fault component current a group of fault component current comparing their amplitude D-S evidence theory

收稿日期: 2012-08-31 出版日期: 2014-11-05

PACS:

TM77

基金资助:国家自然科学基金资助项目（50837002、51177058）

作者简介: 陈国炎男,1980年生,博士,主要研究方向为电力系统继电保护及智能变电站网络通信技术。张哲男,1962年生,教授,博士生导师,主要研究方向为电力系统继电保护及高压输电线路故障定位、超导电力新技术等。

引用本文:

陈国炎, 张哲, 尹项根, 姚瑶, 何志勤. 基于证据理论融合的广域后备保护新方法[J]. 电工技术学报, 2014, 29(10): 246-255. Chen Guoyan, Zhang Zhe, Yin Xianggen, Yao Yao, He Zhiqin. A New Algorithm of Wide Area Backup Protection Based on Evidence Theory Fusion. Transactions of China Electrotechnical Society, 2014, 29(10): 246-255.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I10/246

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