摘要
直流潮流控制器是解决环网式直流配电网的线路潮流不完全可控的有效技术手段。然而,现有方法未能充分发掘其在故障限流中的潜力。该文建立了三有源桥串并联潮流控制器(triple active bridge power flow controller,TAB-PFC)的故障模量分析模型,提出一种基于TAB-PFC的双极直流配电网主动限流策略。首先阐述了TAB-PFC的限流原理,提出基于TAB-PFC的主动限流控制策略。然后对TAB-PFC不同故障阶段进行建模,并计及极间互感构建含TAB-PFC的双极直流配电网故障模量等效模型。在此基础上,分析不同参数对TAB-PFC的限流能力的影响,为其参数选取提供依据。在MATLAB/Simulink搭建了含TAB-PFC的双极直流配电网模型,验证了所提主动限流策略的有效性及故障等效电路模型和参数分析的正确性。
A DC power flow controller is an effective technical means to solve the problem of incomplete controllability of power flow in a ring DC distribution network.However,existing methods fail to exploit its potential in fault current limiting fully.This paper establishes a fault modulus analysis model for a triple active bridge power flow controller(TAB-PFC).It proposes an active current limiting strategy for bipolar DC distribution networks based on TAB-PFC.Firstly,the current limiting principle of TAB-PFC is explained,and an active current limiting control strategy based on TAB-PFC is proposed.Then,this paper models the different fault stages of TAB-PFC and constructs an equivalent fault modulus model for bipolar DC distribution networks with TAB-PFC considering mutual inductance.On this basis,analyze the impact of different parameters on the current limiting ability of TAB-PFC,and provide a basis for its parameter selection.A simulation model of a bipolar DC distribution network with TAB-PFC was established in MATLAB/Simulink to verify the effectiveness of the proposed active current limiting strategy and the correctness of the fault equivalent circuit model and parameter analysis.
作者
刘洋涛
廖建权
郭春生
谭子鹏
王渝红
王强钢
LIU Yangtao;LIAO Jianquan;GUO Chunsheng;TAN Zipeng;WANG Yuhong;WANG Qianggang(College of Electrical Engineering,Sichuan University,Chengdu 610065,Sichuan Province,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology(Chongqing University),Shapingba District,Chongqing 400044,China)
出处
《电网技术》
北大核心
2025年第1期343-352,I0105-I0111,共17页
Power System Technology
基金
国家自然科学基金项目(52207126)。
关键词
双极直流配电网
串并联潮流控制器
短路电流计算
故障电流抑制
极间互感
low voltage bipolar DC distribution network
series parallel power flow controller
short circuit current calculation
fault current suppression
mutual inductance
