Voltage sag analysis of a transmission and distribution network based on a compensation method under a distribution network fault

被引：0

作者：

Li H. ^{[1
]}

Zeng J. ^{[2
]}

Zhang H. ^{[1
]}

Ai J. ^{[1
]}

Li Y. ^{[1
]}

Yu T. ^{[2
]}

Qiu G. ^{[2
]}

机构：

[1] Electric Power Research Institute, Shenzhen Power Supply Bureau Co., Ltd., Shenzhen

[2] School of Electric Power, South China University of Technology, Guangzhou

来源：

Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2020年 / 48卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Compensation method; Equivalence of distribution network; Short circuit calculation; Superposition; Voltage sag analysis of transmission and distribution network;

D O I：

10.19783/j.cnki.pspc.191123

中图分类号：

学科分类号：

摘要：

There is a problem that the calculation of short-circuit faults in a distribution network only considers the distribution network, and neglects the influence of the transformer and the coupling relationship of transmission and the distribution network. This paper proposes a solution based on compensation. Based on the topology and operational data of a distribution network, a normal model is established. According to the type and location of a distribution network short circuit fault, the equivalence of a distribution network under short circuit fault is established. A three-sequence model of a transformer is used to establish the equivalence of the distribution network at the bus bar of the high voltage side of the transformer. Incorporating the equivalence of the distribution network's normal form into a node admittance matrix and combining with the variation of equivalence of distribution network before and after the fault occurs, the variation on the state of the transmission network is calculated using the compensation method. After the variation is superposed with the network state before the fault, the state of transmission and distribution network is determined successively, and finally voltage sag analysis of transmission and distribution network is completed. The feasibility and accuracy of the proposed algorithm are verified by simulating certain urban power systems. © 2020, Power System Protection and Control Press. All right reserved.

引用

页码：45 / 53

页数：8

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