摘要
直流电网技术对设备提出了新的要求,具有快速开断能力的高压直流断路器是直流电网的核心设备,现有试验技术在功率方面不能满足直流断路器短时电流耐受试验的要求。为解决该问题,该文分析了在直流电网中直流断路器耐受的短时电流应力,提出了基于损耗及结温等效的试验方法及试验电路拓扑,搭建了PSCAD/EMTDC电磁暂态仿真模型。并以张北工程康宝站为例,对直流断路器短时电流耐受试验进行了仿真验证。仿真结果表明:该试验电路能够有效地实现短时电流对直流断路器的应力考核,为试验平台的设计提供指导作用。
DC power grid technology puts forward new requirements for equipment.High-voltage DC circuit breakers with fast breaking capability are the core equipment of DC power grids.However,the existing test technology fails to meet the short-term current tolerance requirements of DC circuit breakers in terms of power.To this end,this paper analyzes the shortterm current stress tolerated by the DC circuit breaker in the DC grid,proposes a test method and test circuit topology based on the loss and junction temperature equivalence and builds a PSCAD/EMTDC electromagnetic transient simulation model.Taking the Kangbao Station of Zhangbei Project as an example,the short-term current withstand test of the DC circuit breaker was simulated and verified.The simulation results show that the test circuit can effectively implement the short-term current stress assessment of the DC circuit breaker,providing guidance for the design of the test platform.
作者
王秀环
周军川
靳祖磊
孙立波
陈二松
WANG Xiuhuan;ZHOU Junchuan;JIN Zulei;SUN Libo;CHEN Ersong(State Key Laboratory of Advance Power Transmission Technology(Global Energy Interconnection Research Institute Co.,Ltd.),Beijing 102200,China;Beijing Key Laboratory of High Power Electronic(Global Energy Interconnection Research Institute Co.,Ltd.),Beijing 102200,China;State Grid Hebei Electric Power Research Institute,Shijiazhuang 050021,Hebei,China)
出处
《电网与清洁能源》
北大核心
2022年第3期8-15,共8页
Power System and Clean Energy
基金
国家电网公司总部科技项目(5500-201958133A-0-0-00)。
关键词
直流断路器
结温等效
试验方法
应力考核
DC circuit breaker
junction temperature equivalence
test method
stress assessment
