四种典型直流故障处理方案下柔性直流输电系统的故障穿越特性对比研究

陈凌云; 程改红; 王琼芳; 严铭; 张哲任; 徐政

doi:10.14044/j.1674-1757.pcrpc.2020.05.019

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四种典型直流故障处理方案下柔性直流输电系统的故障穿越特性对比研究

系统应用研究 | 更新时间：2024-09-14

- 四种典型直流故障处理方案下柔性直流输电系统的故障穿越特性对比研究
- Comparative Study on DC Fault Ride-through Performances of Flexible HVDC Systems Under Four Typical DC Fault Clearance Schemes
- 电力电容器与无功补偿 2020年41卷第5期页码：110-117
- 作者机构：
  
  1. 中国电力工程顾问集团中南电力设计院有限公司
  2. 浙江大学电气工程学院
- 作者简介：
- 基金信息：
  
  中国电力工程顾问集团中南电力设计院有限公司科技项目《直流输电系统机电暂态建模及仿真验证研究》
- DOI：10.14044/j.1674-1757.pcrpc.2020.05.019
  中图分类号： TM721.1
- 纸质出版日期：2020，
- 稿件说明：
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[1]陈凌云,程改红,王琼芳,严铭,张哲任,徐政.四种典型直流故障处理方案下柔性直流输电系统的故障穿越特性对比研究[J].电力电容器与无功补偿,2020,41(05):110-117.

CHEN LINGYUN, CHENG GAIHONG, WANG QIONGFANG, et al. Comparative Study on DC Fault Ride-through Performances of Flexible HVDC Systems Under Four Typical DC Fault Clearance Schemes. [J]. Power capacitor & reactive power compensation, 2020, 41(5): 110-117.
[1]陈凌云,程改红,王琼芳,严铭,张哲任,徐政.四种典型直流故障处理方案下柔性直流输电系统的故障穿越特性对比研究[J].电力电容器与无功补偿,2020,41(05):110-117. DOI： 10.14044/j.1674-1757.pcrpc.2020.05.019.

CHEN LINGYUN, CHENG GAIHONG, WANG QIONGFANG, et al. Comparative Study on DC Fault Ride-through Performances of Flexible HVDC Systems Under Four Typical DC Fault Clearance Schemes. [J]. Power capacitor & reactive power compensation, 2020, 41(5): 110-117. DOI： 10.14044/j.1674-1757.pcrpc.2020.05.019.

摘要

与电网换相换流器（line commutated converter

LCC）相比

基于模块化多电平换流器（modular multilevel converter

MMC）的柔性直流输电系统最主要问题在于直流故障的处理

目前学术界和工业界已提出多种具备直流故障自清除能力的柔性直流输电系统。为了更好地了解这些柔性直流输电系统的优劣

很有必要对其直流故障特性进行分析。本文针对4种典型的具备直流故障自清除能力的柔性直流输电系统

分析比较了他们的直流故障穿越特性。首先

本文总结了4种典型直流故障处理方案

包括:采用直流断路器、采用全桥子模块与半桥子模块构成的混合子模块换流器（FHMMC）、采用基于LCC和MMC并在MMC直流出口处安装大功率二极管阀组构成的混合直流输电系统（LCC-D-MMC）、采用LCC和MMC混合级联的换流站结构。然后

本文分析了这4种直流故障处理方案的基本原理、其对应柔性直流输电系统的控制方式以及故障清除机理。最后

在PSCAD/EMTDC中搭建了三端高压直流输电系统仿真模型

对比了4种直流故障处理方案下柔性直流输电系统的故障穿越特性。仿真结果表明

直流断路器能快速并且有选择地隔离直流故障

其对应柔性直流输电系统的故障穿越特性最好。考虑直流系统运行的经济性以及灵活性

LCC-MMC混合级联的拓扑结构在工程上具有一定的实用价值。

Abstract

Compared with line commutated converter（LCC）

the main problem of flexible high voltage direct current（HVDC） system based on modular multilevel converter（MMC） is the DC fault clearance schemes.At present

academic and industrial circles have proposed a variety of flexible HVDC systems with DC fault clearance capability.In order to better understand the advantages and disadvantages of these flexible HVDC systems

it is necessary to analyze their DC fault clearance characteristics.For the four typical flexible HVDC systems with DC fault clearance capability

the paper analyzes and compares their DC fault ride-through performances.Firstly

this paper summarizes four typical DC fault clearance configurations including the DC circuit breaker（DCCB）

the hybrid MMC with full bridge submodules and half bridge submodules（FHMMC）

the LCC-MMC hybrid configuration with diode groups installed in the DC line close to the converters（LCC-D-MMC） and the hybrid topology with an LCC and an MMC in series-connection.Then

the basic structure

control mode and fault clearance schemes of the four configurations based flexible HVDC systems are discussed.Finally

a three-terminal simulation model is built to compare the DC fault clearance characteristics of the four flexible HVDC systems.The simulation result shows that the DCCB can isolate DC faults quickly and selectively

and the DCCB based flexible HVDC system performs the best DC fault clearance characteristics.Considering the cost efficiency and operation flexibility

the LCC-MMC hybrid topology has certain value of practic al applic ation in engineering.

关键词

直流故障处理方案直流故障穿越特性对比DCCBFHMMCLCC-D-MMCLCC-MMC混合级联

Keywords

DC fault clearance schemescomparison of DC fault ride-through performancesDC circuit breakerFHMMCLCC-D-MMCLCC-MMC hybrid topology

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