基于支路功率估计的配电网拓扑识别  

Identification of Distribution Network Topology Based on Branch Power Estimation

作　　者：郭少飞 李铁成 陈天英 张卫明 李泽 吴巨豪 GUO Shaofei;LI Tiecheng;CHEN Tianying;ZHANG Weiming;LI Ze;WU Juhao(Electric Power Research Institute,State Grid Hebei Electric Power Co.,Ltd,Shijiazhuang 050020,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710115,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,石家庄050020 [2]西安交通大学电气工程学院,西安710115

出　　处：《电力系统及其自动化学报》2022年第8期8-17,共10页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(52007143);国网河北电科院2020年校企合作科技项目(SGHEDK00DYJS2000232)。

摘　　要：快速准确的拓扑识别是保障电网安全、稳定和经济运行的重要基础。针对现有拓扑识别方法所需量测冗余、设备成本高、难以适应网络结构的快速变化、耗时长等问题,提出一种基于支路功率估计的配电网拓扑识别方法。首先,基于回路分析法和叠加定理,利用独立回路附加功率完成对支路功率的初步估计。然后,引入功率损耗构建支路功率修正方程,根据精确的修正支路功率列举较优匹配拓扑及其邻拓扑。最后,通过与有限的量测数据比较选出最佳匹配网络拓扑。所提方法所需量测较少,其功率修正与合理枚举同时兼顾了识别精度与计算效率。通过环网和辐射网的算例验证表明,该算法在不同量测误差下均具有与现有算法相当的识别准确度和更高的时效性,实用性强。The fast and accurate topology identification is an important basis for ensuring the safety,stability and economic operation of power grid. Aimed at problems such as measurement redundancy,high cost of measurement equipment,difficulty in adapting to the rapid change in network structure and long time-consumption when using the existing topology identification methods,an identification method for distribution network topology based on branch power estimation is proposed. First,based on the loop analysis method and the superposition theorem,the additional power of independent loops is used to complete the preliminary estimation of branch power. Then,the branch power correction equation is constructed by introducing the power loss,and a better matching topology and its adjacent topology are enumerated according to the accurate corrected value of branch power. Finally,the best matching network topology is selected by comparing with the limited measurement data. The proposed method requires less measurement,and its power correction and reasonable enumeration take into account both the identification accuracy and calculation efficiency. The results of examples of a ring network and a radial network show that the proposed method has the same identification accuracy as the existing algorithms under different measurement errors and an even higher timeliness,indicating its strong practicability.

关 键 词：支路功率估计 配电网拓扑识别 附加功率 功率损耗 功率修正 

分 类 号：TM73[电气工程—电力系统及自动化]