DC Grid Fault Recovery Strategy Based on Cascaded Full-bridge Hybrid DC Circuit Breaker

YAO Weizheng; ZHANG Hao; WU Jinlong; WANG Xianwei; LIU Xinhe; XING Dengjiang; HAO Junfang

doi:10.13296/j.1001-1609.hva.2018.12.015

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DC Grid Fault Recovery Strategy Based on Cascaded Full-bridge Hybrid DC Circuit Breaker

更新时间：2025-04-26

- DC Grid Fault Recovery Strategy Based on Cascaded Full-bridge Hybrid DC Circuit Breaker
- High VoltageApparatus Vol. 54, Issue 12, Pages: 96-103(2018)
- 作者机构：
  
  1. 许继集团有限公司
  2. 西安许继电力电子技术有限公司
  3. 许继电气直流输电系统公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.12.015
  CLC： TM561
- Published：2018
- 稿件说明：
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[1]姚为正,张浩,吴金龙,王先为,刘欣和,行登江,郝俊芳.基于级联全桥型混合直流断路器的直流电网故障恢复策略研究[J].高压电器,2018,54(12):96-103.

YAO Weizheng, ZHANG Hao, WU Jinlong, et al. DC Grid Fault Recovery Strategy Based on Cascaded Full-bridge Hybrid DC Circuit Breaker[J]. High voltageapparatus, 2018, 54(12): 96-103.
[1]姚为正,张浩,吴金龙,王先为,刘欣和,行登江,郝俊芳.基于级联全桥型混合直流断路器的直流电网故障恢复策略研究[J].高压电器,2018,54(12):96-103. DOI： 10.13296/j.1001-1609.hva.2018.12.015.

YAO Weizheng, ZHANG Hao, WU Jinlong, et al. DC Grid Fault Recovery Strategy Based on Cascaded Full-bridge Hybrid DC Circuit Breaker[J]. High voltageapparatus, 2018, 54(12): 96-103. DOI： 10.13296/j.1001-1609.hva.2018.12.015.

摘要

直流电网技术是解决可再生能源并网消纳的有效手段

而直流电网的故障恢复是目前亟待解决的关键问题。文中基于对级联全桥型混合直流断路器的可控重合闸策略分析

提出了直流线路短路故障永久性或瞬时性故障特性判别方法;基于对直流电网故障恢复的需求分析

提出了基于级联全桥型混合直流断路器的直流电网故障恢复策略

在满足直流电网故障恢复的快速性及设备安全性的同时

有效避免了在永久性故障下重合闸引起的二次故障。最后通过PSCAD/EMTDC仿真验证了文中所提直流故障特性判别方法有效可靠

所提故障恢复策略能够满足直流电网故障恢复需求。

Abstract

DC grid technology is one of the most effective means for the interconnection of renewable energy generation

and it is a key problem how to recover from faults of the DC grid.Firstly

this paper proposes the fault identification method which can distinguish the transient faults and permanent faults on DC transmission lines.Secondly

with regard to the DC grid fault recovery demand

this paper proposes the scheme of fault recovery by the cascaded fullbridge hybrid DC circuit breaker（CFB-Hybrid-DCCB）.It can avoid the second fault during restarting the DC circuit breaker.Finally

based on PSCAD/EMTDC

a DC grid system is constructed

and simulation results show that conclusion of above-mentioned fault analysis is correct.

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