中国电力

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基于可达矩阵和贝叶斯定理的含分布式电源的配电网故障区段定位

王巍璋1,王淳2,尹发根3   

  1. 1. 南昌大学
    2. 江西省南昌市南昌大学前湖校区电气与自动化系
    3. 江西省南昌市宜春学院理工学院
  • 收稿日期:2019-06-06 修回日期:2019-10-15 出版日期:2019-11-17 发布日期:2019-11-17
  • 通讯作者: 王巍璋
  • 基金资助:
    基于IP的智能电网信息接入与传输理论和技术

Fault Section Location of Power Distribution Network with Distributed Generation Based on Reachability Matrix and Bayes’Theorem

  • Received:2019-06-06 Revised:2019-10-15 Online:2019-11-17 Published:2019-11-17

摘要: 随着分布式电源接入配电网,电流变为双向流动,导致传统的故障区段定位方法不再适用。为解决含分布式电源的配电网故障区段定位问题,提出了一种基于可达矩阵和贝叶斯定理的故障区段定位方法。不同于传统矩阵算法中使用邻接矩阵描述网络拓扑的思路,使用蕴含信息量更大、全局可观性更强的可达矩阵进行拓扑描述和矩阵运算。为应对信息畸变,利用贝叶斯定理进行容错处理,从而找出故障区段。算例结果表明,该方法具有良好的通用性,对于电机型和逆变型分布式电源,可以统一处理。对于含分布式电源的配电网中的单个故障和多重故障,该方法能够准确定位故障区段并且具有一定的容错性。

Abstract: With the access of distributed generation to the power distribution network, the current becomes bidirectional flow, which makes traditional fault section location methods no longer applicable. To solve the problem of fault section location of power distribution network with distributed generation, a method based on reachability matrix and Bayes’ theorem was put forward. Different from the idea of using adjacency matrix to describe the network topology in traditional matrix algorithm, the reachability matrix which contained more information and had stronger global observability was used for topology description and matrix operation in this paper. To deal with information distortion, Bayes’ theorem was utilized in fault tolerance processing to find out the fault section(s). The results of test cases show that the proposed method has good generality as it can handle both generator-based and inverter-based distributed generation in a uniform way. For single fault and multiple faults in the power distribution network with distributed generation, the proposed method can locate fault section(s) accurately and has certain fault tolerance.