Fast Method of Fault Detection and Location of Low Voltage Direct Current Distribution Network

GUAN Weiya; LI Guowen; ZHOU Xiang

doi:10.14044/j.1674-1757.pcrpc.2020.02.024

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Fast Method of Fault Detection and Location of Low Voltage Direct Current Distribution Network

更新时间：2024-09-14

- Fast Method of Fault Detection and Location of Low Voltage Direct Current Distribution Network
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 41, Issue 2, Pages: 133-139(2020)
- 作者机构：
  
  1. 1. 国网江苏电力设计咨询有限公司
  2. 国网江苏省电力有限公司经济技术研究院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2020.02.024
  CLC： TM721.1
- Published：2020，
- 稿件说明：
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[1]管维亚,李国文,周翔.低压直流配网故障在线快速检测和定位方法研究[J].电力电容器与无功补偿,2020,41(02):133-139.

GUAN WEIYA, LI GUOWEN, ZHOU XIANG. Fast Method of Fault Detection and Location of Low Voltage Direct Current Distribution Network. [J]. Power capacitor & reactive power compensation, 2020, 41(2): 133-139.
[1]管维亚,李国文,周翔.低压直流配网故障在线快速检测和定位方法研究[J].电力电容器与无功补偿,2020,41(02):133-139. DOI： 10.14044/j.1674-1757.pcrpc.2020.02.024.

GUAN WEIYA, LI GUOWEN, ZHOU XIANG. Fast Method of Fault Detection and Location of Low Voltage Direct Current Distribution Network. [J]. Power capacitor & reactive power compensation, 2020, 41(2): 133-139. DOI： 10.14044/j.1674-1757.pcrpc.2020.02.024.

摘要

低压直流配网在负荷侧对保障负荷需求具有重要意义

但是直流配网线路一旦发生故障则对系统构成严重威胁

直流配网故障定位和检测显得尤为重要。本文提出了一种在线快速检测和定位的方法。首先对直流配网分类进行说明

从逆变器种类、电压等级、接地方式和网络拓扑说明了其特点。接着提出了本文的保护机制

抽取不同类型故障特点之后

提出了零阶方根、二阶方根和四阶方根联合故障检测方法

并分析了故障阈值以及故障定位原理

给出判断故障极的方法。最后本文在IEEE13节点系统进行仿真

分析了不同故障阻抗、故障距离以及故障极下本文方法的适用性。

Abstract

The low-voltage DC distribution network is important to ensure the load demand on the load side

but once the fault appears in the low voltage network lines

it will pose great challenge to the entire system

therefore the fast and secure fault detection is important to it.This paper proposes a method for online rapid detection and location.Firstly

the DC distribution network classification is explained

and its characteristics are explained according to the inverter type

voltage level

grounding mode and network topology.Then the protection mechanism of this paper is proposed.After extracting the characteristics of different types of faults

the joint detection methods of zero-order square root

second-order square root and fourth-order square root are proposed.The fault threshold

fault location principle and fault pole detection are analyzed.Finally

the simulation is carried out in the IEEE 13 node system

and the applicability of the proposed method is analyzed under different fault impedances

fault distances and faults.

关键词

低压直流配网故障检测故障极故障阻抗

Keywords

LVDC distributed generationfault detectionfault polefault impedance

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