混合式高压直流断路器开断过程整机应力特性研究  

Research on Stress Characteristics of Hybrid HVDC Circuit Breaker During Breaking Process

作　　者：辛业春[1] 孙浩然 王威儒 王拓 杨勇 XIN Yechun;SUN Haoran;WANG Weiru;WANG Tuo;YANG Yong(School of Electrical Engineering,Northeast Electric and Power University,Jilin Jilin 132012,China)

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《高压电器》2023年第6期40-47,共8页High Voltage Apparatus

基　　金：国家自然科学基金项目(U2066208)。

摘　　要：混合式高压直流断路器开断短路电流过程复杂,导致开断过程中设备所承受的应力同样较为复杂。为明确其在开断过程中所承受的分断应力,有效指导混合式直流断路器的设计和试验,有必要对断路器整机应力特性进行研究。依据断路器动作时序将其开断过程细分为3个阶段,提出计及交流侧影响的整机分断应力计算方法。通过PSCAD仿真系统构建了混合式高压直流断路器及柔直电网模型,对电流应力、电压应力和耗散能量等进行了仿真分析,结果表明,所提计算方法可较为准确的获得各支路分断应力。研究结果可为混合式直流断路器及直流电网参数设计提供参考。The process of breaking short circuit current by hybrid HVDC circuit breaker is complicated,which leads to the stress of equipment in the process of breaking being also complicated.It is necessary to study the stress characteristics of the circuit breaker in order to clarify the breaking stress of the circuit breaker and to guide the design and test of the hybrid DC circuit breaker effectively.According to the operation time sequence of the circuit breaker,the breaking process is divided into three stages,and the calculation method of breaking stress considering the influence of AC side is proposed.The hybrid DC circuit breaker and flexible power grid model are constructed through PSCAD simulation system,and the simulation analysis for the current stress,voltage stress and dissipated energy are performed.The results show that the proposed method can obtain more accurately the breaking stress of each branch.The research results can provide reference for the design of hybrid DC circuit breaker and DC network parameters.

关 键 词：柔性直流输电 混合式直流断路器 开断操作 应力特性 

分 类 号：TM561[电气工程—电器] TM721.1