基于零序电流的风电场单相接地故障区段定位

doi:10.16182/j.issn1004731x.joss.17-0227

系统仿真学报 ›› 2019, Vol. 31 ›› Issue (7): 1408-1415.doi: 10.16182/j.issn1004731x.joss.17-0227

基于零序电流的风电场单相接地故障区段定位

郑艳艳, 朱永利, 刘童童, 苏珊珊

华北电力大学（保定）电气与电子工程学院,河北保定 071003

收稿日期:2017-05-16 修回日期:2017-08-23 发布日期:2019-12-12
作者简介:郑艳艳(1987-),女,山东聊城,博士生,研究方向为线路故障检测与诊断;朱永利(1963-),男,河北冀州,博士,教授,博导,研究方向为网络化监控与智能信息处理。
基金资助:
国家自然科学基金(51677072), 中央高校基本科研业务费专项资金(2017XS118)

Single-Phase Grounding Fault Location in Wind Farm Based on Zero-Sequence Current

Zheng Yanyan, Zhu Yongli, Liu Tongtong, Su Shanshan

School of Electrical and Electronic Engineering, North China Electric Power University Baoding, Baoding 071003, China

Received:2017-05-16 Revised:2017-08-23 Published:2019-12-12

摘要/Abstract

摘要： 风电系统不同于常规输电系统,其集电线包含多段电缆,采用架空线—电缆混合输电形式,且距离大约为3~20 km。风电场35 kV中性点接地方式不同于常规配电网,其中性点采用曲折接线接地变压器。在混合线路中,由于各段线路行波速度不一致,用于均匀传输线的传统测距算法无法适用。提出基于零序电流的单相接地故障定位方法。研究了风电系统中性点接地方式,针对单相接地故障,提出采用比较暂态零序电流相似性的定位方法。通过仿真表明所提方法对于风电场适应性更强。

关键词: 风电场, 接地变压器, 混合线路, 零序电流, 故障定位

Abstract: The wind power system is different from the conventional transmission system, and its collecting line contains multi sections of cable. The collecting line of wind farm adopts overhead line-power cable hybrid transmission form, and its distance is about 3~20km. Wind farm 35kV neutral point grounding method is different from the conventional distribution network, and its neutral point adopts the winding grounding transformer. In hybrid transmission lines, due to the different velocities of traveling wave in power cable and overhead line, the traditional location algorithm for uniform transmission line is not suitable. A new method of single-phase to grounding fault location based on zero-sequence current is put forward. The neutral point grounding method of wind power system is studied, and the method of comparing zero-sequence current similarity is put forward for the single-phase grounding fault. The simulation shows that the proposed method is more adaptable to wind farms.

Key words: wind farm, grounding transformer, hybrid transmission, zero-sequence current, fault location

中图分类号:

TM755

郑艳艳, 朱永利, 刘童童, 苏珊珊. 基于零序电流的风电场单相接地故障区段定位[J]. 系统仿真学报, 2019, 31(7): 1408-1415.

Zheng Yanyan, Zhu Yongli, Liu Tongtong, Su Shanshan. Single-Phase Grounding Fault Location in Wind Farm Based on Zero-Sequence Current[J]. Journal of System Simulation, 2019, 31(7): 1408-1415.

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基于零序电流的风电场单相接地故障区段定位

Single-Phase Grounding Fault Location in Wind Farm Based on Zero-Sequence Current

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