母线差动保护区外转区内故障再动作判据

HUANG Jidong

您当前的位置：

首页 >

文章列表页 >

母线差动保护区外转区内故障再动作判据

更新时间：2025-08-13

- 母线差动保护区外转区内故障再动作判据
- Automation of Electric Power Systems Vol. 38, Issue 18, Pages: 120-124(2014)
- 作者机构：
  
  许继集团有限公司,河南省,许昌市,461000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2014
- 稿件说明：
移动端阅览
HUANG Jidong. [J]. Automation of electric power systems, 2014, 38(18): 120-124.
DOI：

HUANG Jidong. [J]. Automation of electric power systems, 2014, 38(18): 120-124. DOI：

摘要

文中根据故障时母线差动保护制动电流突变大的特点提出了保护启动判别方案，在启动之后保护连续判断3个差流采样点的幅值是否变化的特征，确定故障是区内故障或区外故障。判为区内故障时，开放差动保护，判为区外故障时，闭锁差动保护。考虑到由区外故障转换为区内故障时差动保护能够可靠动作，保护判为区外故障后需要投入差动保护的再动作判别；提出了2种基于差动电流采样值的差动保护区外转区内故障再动作方案。一种是基于差动电流采样值的再动作方案；另一种是将差动电流采样值差分处理后的差分再动作方案。

Abstract

A protection start discrimination is proposed according to the variation of bus differential protection braking current during fault. After start

the protection relay analyzes the amplitudes variation characteristics of three differential current sampling points continuously

based on which the internal fault and external fault can be discriminated. When the fault is judged to be internal

differential protection is opened; when external

the differential protection is blocked. In order to guarantee reliable operation of differential protection when external fault transforms to internal fault

the re-tripping discrimination of differential protection needs to be switched in. Two differential protection re-tripping schemes for external fault transforming to internal fault based on the differential current sampling value is proposed. One is based on differential sampling value

the other is based on the differentiated differential sampling value.

关键词

Keywords

references

Views

2372

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

含逆变型分布式电源的配电网正序阻抗纵联保护

基于母线差动保护的电子式与电磁式互感器同步应用

Related Author

CHENG Fei

GUO Chunlin

GAO Zeyang

ZHAO Bingzhuo

HAI Xiaotao

CAO Xi

HUANG Qing

XU Meng

Related Institution

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

State Grid Commercial Electric Vehicle Investment Co., Ltd.

State Grid Jiangsu Electric Power Co., Ltd.

Key Laboratory of Power System Intelligent Dispatch and Control(Shandong University)

Zhongshan Power Supply Bureau， Guangdong Power Grid Co. Ltd.

⁰