计及直流故障特性的典型拓扑直流配电网互联装置配置  

Configuration of Interconnecting Devices in DC Distribution Network with Typical Topologies Considering DC Fault Characteristics

作　　者：李国武[1] 祁晓敏 周毅[1] 刘德坤[1] LI Guo-wu;QI Xiao-min;ZHOU Yi;LIU De-kun(State Grid Zhangjiakou Electric Power Co.,Ltd.,Zhangjiakou 075000,China;China Electric Power Planning&Engineering Institute,Beijing 100120,China)

机构地区：[1]国网张家口供电公司,河北张家口075000 [2]电力规划设计总院,北京100120

出　　处：《电力勘测设计》2020年第8期5-10,共6页Electric Power Survey & Design

基　　金：国家电网公司科技项目(520107170004)。

摘　　要：直流配电网是未来配电网的重要组成部分,合理配置直流配电网的互联装置是未来电网规划和构建的基本要求,本文针对多端直流配电网不同拓扑结构的故障特性开展全面研究。首先介绍了直流配电网的典型拓扑和互联装置,在此基础上,分析了各类拓扑发生直流故障后线路故障电流的特性,明确了各拓扑对直流断路器、DC/DC变换器等互联装置的要求。最后,对各拓扑结构进行对比分析,明确各配置方案的优缺点,为直流配电网互联装置的配置提供进一步的参考依据和理论基础。DC distribution network is one of the most important forms of the distribution networks in the future.It is the basic requirement for future power grid planning and construction to configure interconnecting devices of the DC distribution network reasonably.This paper focuses on the fault characteristics of DC distribution network with different topologies.Firstly,the basic topology and interconnection devices of the DC distribution network are introduced in detail.Then the fault current characteristics after DC faults of various topologies are analyzed comprehensively.The requirements of interconnection devices including DC circuit breaker and DC/DC converters are clarified in each topology.Finally,all the topologies are compared thoroughly,which makes the advantages and disadvantages of configuration scheme more clearly.The further reference and theoretical basis of the configuration of interconnecting devices of DC distribution network are provided by this paper.

关 键 词：直流配电网 故障特性 互联装置 拓扑结构 

分 类 号：TM721[电气工程—电力系统及自动化]