阻容型混合式直流断路器优化设计及全工况开断性能分析  

Optimized Design and Full Operation Breaking Performance Analysis of Resistance Capacity Hybrid DC Circuit Breakers

作　　者：刘晓明 于新超 陈海 史红菲 姜文涛[2] LIU Xiaoming;YU Xinchao;CHEN Hai;SHI Hongfei;JIANG Wentao(State Key Lab of Reliability and Intelligence of Electrical Equipment(Hebei University of Technology),Beichen District,Tianjin 300401,China;School of Control Science and Engineering,Tiangong University,Xiqing District,Tianjin 300387,China)

机构地区：[1]省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学),天津市北辰区300401 [2]天津工业大学控制科学与工程学院,天津市西青区300387

出　　处：《电网技术》2024年第12期5149-5158,I0069-I0072,I0068,共15页Power System Technology

基　　金：国家自然科学基金面上项目(No.52177139);河北省省级科技计划项目(No.E2021202186)。

摘　　要：为解决柔性直流电网中故障电流快速开断难题,在比对分析典型混合式直流断路器方案控制保护策略与经济性的基础上,该文提出一种基于晶闸管的阻容型混合式直流断路器拓扑结构与参数化设计方法。利用阻性电路抑制电流电压上升,同时具备钳位开断、弱电流开断、电容自充电和自适应重合闸功能,实现整机无全控型器件。首先提出该拓扑不同模式下的控制保护策略和参数化建模方法。其次,给出器件参数设计准则,并采用多目标水母优化算法对参数组合方案进行可靠性寻优。此外,基于PSCAD/EMTDC,建立四端直流输电网模型,比对分析了所提混合式直流断路器参数化设计方案在不同工况下的开断性能、经济性和适用性。To solve the problem of fast-breaking of fault current in flexible DC power grids,a topology structure and parameterized design method of resistance capacitance hybrid DC circuit breakers based on thyristors are proposed based on the comparison and analysis of control and protection strategies and economy of typical hybrid DC circuit breaker schemes.By introducing a resistive circuit to suppress the current-voltage rise of the circuit breaker,the functions of phase-selective opening,weak current opening,capacitor self-charging,and adaptive reclosing can be obtained,and there is no fully controlled device in the whole machine.Firstly,the control strategies and mathematical models for different modes of the proposed topology are described.Then,the device parameter design guidelines are given out,and a multi-objective jellyfish search algorithm(MOJS)is applied to find the optimum parameter combinations.Finally,by employing the PSCAD/EMTDC four-terminal DC transmission network model,the breaking performance of the proposed topology is simulated and evaluated under diverse operational conditions,and its economics and applicability have been analyzed.

关 键 词：直流输电网 混合式直流断路器 钳位开断 自适应重合闸 

分 类 号：TM721[电气工程—电力系统及自动化]