电力系统保护与控制2024，Vol.52Issue(14)：103-110,8.DOI:10.19783/j.cnki.pspc.231515
含多分布式电源的小电阻接地系统单相接地故障特征分析
Analysis of single-phase grounding fault characteristics of low resistance grounding system with multi-distributed power supply
摘要
Abstract
The single-phase grounding fault characteristics of the distribution network system via low resistance grounding mode will be affected by the grounding mode adopted by different types of grid-connected DGs.Aiming at the problem,combined with the symmetrical component method,a single-phase grounding fault analysis model of distribution network with multiple grid-connected DGs having different types and grounding modes is established first.The single-phase grounding fault point current of the system and the three-sequence current of the line are analyzed afterwards.Finally,the simulation model of single-phase ground fault is built by Matlab/Simulink,which verifies the correctness of the analysis of fault current characteristics.The results show that the grid-connected DG being ungrounded has the least impact on the system fault characteristics.This provides a theoretical basis for the selection of the type of grid-connected DG and the grounding mode of the grid-connected transformer.关键词
分布式电源/单相接地故障/经小电阻接地方式配电网/故障电流/变压器接地方式Key words
distributed power system/single-phase grounding fault/distribution network through low resistance grounding mode/fault current/transformer grounding mode引用本文复制引用
田君杨,李海勇,蒋连钿,沈梓正,任浩林,郭丽伟..含多分布式电源的小电阻接地系统单相接地故障特征分析[J].电力系统保护与控制,2024,52(14):103-110,8.基金项目
This work is supported by the National Natural Science Foundation of China(No.52077221). 国家自然科学基金项目资助(52077221) （No.52077221）
南方电网公司科技项目资助(046000KK52220008) （046000KK52220008）
