考虑两个短路点的配电网不对称短路分析与通用计算方法  

General Analysis and Calculation Method of Asymmetric Short-circuit in Distribution Network Considering Two Short-circuit Points

作　　者：杨杉 喻希 张晓彤 罗朝旭 YANG Shan;YU Xi;ZHANG Xiaotong;LUO Zhaoxu(College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,Hunan Province,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,Shaanxi Province,China)

机构地区：[1]湖南工业大学电气与信息工程学院,湖南省株洲市412007 [2]西安交通大学电力设备电气绝缘国家重点实验室,陕西省西安市710049

出　　处：《电网技术》2025年第2期807-814,共8页Power System Technology

基　　金：国家自然科学基金项目(52207205);湖南省教育厅科学研究项目(22C0308)。

摘　　要：针对换流器型分布式电源(inverter based distributed generation,IBDG)广泛应用的新型配电网,解决目前不对称短路电流计算方法主要以计算单个短路点为主,且新增短路点后将面临计算通用性问题,该文研究一种新颖的配电网不对称短路电流计算方法。该方法将2个短路点的情况考虑在内,进一步对不对称短路进行分类,并形成结合IBDG短路等效电路的配电网不对称短路通用等效电路。接着分别建立1个和2个短路点情况下的计算方程和边界方程,提出一种能计及2个不对称短路点的,对配电网普遍适用的不对称短路电流通用计算方法。最后,在一个配电网算例中对所提计算方法进行验证,结果验证了所提方法的正确性和有效性。In the new type of distribution networks,in which inverter-based distributed generation(IBDG)is widely used,the main methods to calculate asymmetric short-circuit current always focus on a single short-circuit point and have low universality to process a newly added short-circuit point.A novel asymmetric short-circuit current calculation method for distribution networks is studied.This method further classifies asymmetrical short circuits by taking two short-circuit points into account,and the universal equivalent circuit of asymmetric short circuits combined with the equivalent circuit of IBDG is formed.Then,the calculation and boundary equations of 1 and 2 short-circuit points are established,respectively,and a general asymmetric short-circuit current calculation method is proposed,which can account for 2 short-circuit points for the distribution network universally.Finally,the proposed method is verified in a distribution network example,and the results show that the proposed method is correct and effective.

关 键 词：新型配电网 不对称短路电流 换流器型分布式电源 通用计算 2个短路点 

分 类 号：TM721[电气工程—电力系统及自动化]