Analysis of the influence of single-phase grounding fault on the power characteristics of grounding transformer

被引：0

作者：

Xian R.-C. ^{[1
]}

Chen L. ^{[1
]}

Zheng C.-X. ^{[2
]}

Zhang B.-Q. ^{[1
]}

Gao H.-P. ^{[1
]}

Fan H.-F. ^{[1
]}

机构：

[1] School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo

[2] State Grid Shandong Electric Power Company Zibo Power Supply Company, Zibo

来源：

Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2022年 / 26卷 / 06期

关键词：

active power; detuning; grounding transformer; power factor; reactive power; single-phase grounding; transition resistance;

D O I：

10.15938/j.emc.2022.06.014

中图分类号：

学科分类号：

摘要：

Aiming at the problem that the single-phase grounding fault of the system has a great influence on the on-line detection of the operation state of the grounding transformer, this paper calculates and analyzes the influencing factors and variation rules of the input active power, reactive power and high-voltage side power factor of the grounding transformer, and establishes the distribution network model with reference to the actual distribution network structure for simulation analysis. The simulation results and the actual fault record data verify the correctness of the conclusions obtained from the calculation and analysis. The results show that when the system has single-phase grounding fault and operates with fault for a long time, the input reactive power and active power of the grounding transformer increase and remain constant, the change of active power is smaller than that of reactive power, and the power factor angle decreases. The input reactive and active power of the grounding transformer has a positive correlation with the degree of detuning, and a negative correlation with the transition resistance of the grounding point. Among them, the reactive power is more obviously affected by the transition resistance and detuning degree. The conclusion can lay a foundation for the research on the online detection technology of its operating state. © 2022 Editorial Department of Electric Machines and Control. All rights reserved.

引用

页码：134 / 141

页数：7

共 20 条

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