Fault Detection Scheme for DC Distribution Network Based on Voltage Transient Characteristics of Reactor

GUO Lishuang; MA Hongtao; LI Fengting

doi:10.14044/j.1674-1757.pcrpc.2021.02.013

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Fault Detection Scheme for DC Distribution Network Based on Voltage Transient Characteristics of Reactor

更新时间：2024-09-14

- Fault Detection Scheme for DC Distribution Network Based on Voltage Transient Characteristics of Reactor
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 42, Issue 2, Pages: 72-78(2021)
- 作者机构：
  
  1. 新疆大学电气工程学院
  2. 国网新疆电力公司昌吉供电公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2021.02.013
  CLC： TM47;TM721.1
- Published：2021，
- 稿件说明：
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[1]郭利爽,马宏涛,李凤婷.基于电抗器电压暂态特性的直流配电网故障检测方案[J].电力电容器与无功补偿,2021,42(02):72-78.

GUO LISHUANG, MA HONGTAO, LI FENGTING. Fault Detection Scheme for DC Distribution Network Based on Voltage Transient Characteristics of Reactor. [J]. Power capacitor & reactive power compensation, 2021, 42(2): 72-78.
[1]郭利爽,马宏涛,李凤婷.基于电抗器电压暂态特性的直流配电网故障检测方案[J].电力电容器与无功补偿,2021,42(02):72-78. DOI： 10.14044/j.1674-1757.pcrpc.2021.02.013.

GUO LISHUANG, MA HONGTAO, LI FENGTING. Fault Detection Scheme for DC Distribution Network Based on Voltage Transient Characteristics of Reactor. [J]. Power capacitor & reactive power compensation, 2021, 42(2): 72-78. DOI： 10.14044/j.1674-1757.pcrpc.2021.02.013.

摘要

直流配电网故障快速可靠检测是柔性直流配电网亟待解决的关键问题之一。基于柔性直流配电网的数学模型

详细分析了辐射状直流配电网的故障特性;区内故障时

安装于线路首端的直流电抗器两端的电压微分小于零;区外故障时

故障特性与之相反。在此基础上

提出了一种基于直流电抗器电压暂态特性的故障检测方案。利用直流电抗器电压微分实现区内、外故障的快速可靠检测;利用正、负极直流电抗器暂态电压幅值实现故障类型的准确判别。所提方案仅利用直流电抗器两端的电压及电压微分即可实现故障的准确快速检测

方案原理简单

硬件要求低

易于实现。最后

在PSCAD/EMTDC平台上搭建辐射状直流配电网模型

仿真结果验证了所提方案的有效性与可行性。

Abstract

Fast and reliable fault detection of DC distribution network is one of the key problems to be solved urgently for flexible DC distribution network. Based on the mathematical model of flexible DC distribution network

the fault characteristics of radial DC distribution network are analyzed in detail. In case of internal fault

the voltage differential on both sides of DC reactor which is installed at the head of line is less than zero

while the fault characteristics is opposite in case of external fault. On this basis

a kind of fault detection scheme based on voltage transient characteristic of DC reactor is proposed. The fast and reliable detection of internal and external fault is achieved by the use of voltage differential of DC reactor.The fault type can be distinguished accurately by using the transient voltage amplitude of positive and negative pole DC reactor. The proposed scheme can detect faults accurately and quickly only by using voltage and voltage differential on both sides of DC reactor. The scheme has simple principle

low hardware requirements and is easy to implement. Finally

a radial DC distribution network model is set up on PSCAD/EMTDC platform. The effectiveness and feasibility of the proposed scheme are verified by the simulation.

关键词

直流配电网电抗器电压电压微分故障检测

Keywords

DC distribution networkreactor voltagevoltage differentialfault detection

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