模块化混合式高压直流断路器研究与应用  

Research and Application of Modular Hybrid High Voltage DC Circuit Breaker

作　　者：魏晓光 周万迪 张升 汤广福 贺之渊 高冲 WEI Xiaoguang;ZHOU Wandi;ZHANG Sheng;TANG Guangfu;HE Zhiyuan;GAO Chong(State Key Laboratory of Advanced Power Transmission Technology(Global Energy Interconnection Research Institute Co.,Ltd.),Changping District,Beijing 102209,China)

机构地区：[1]先进输电技术国家重点实验室(全球能源互联网研究院有限公司),北京市昌平区102209

出　　处：《中国电机工程学报》2020年第6期2038-2046,共9页Proceedings of the CSEE

基　　金：国家电网公司科技项目(张家口可再生能源示范区重大科技示范工程运维关键技术研究)(52018K 170028)。

摘　　要：多端柔性直流与直流电网为提升大规模可再生能源并网与消纳提供了灵活高效的解决途径,高压直流断路器可实现直流电网故障区域快速隔离,是构建直流电网的核心设备。混合式直流断路器兼顾传统机械式和固态式优点,低损与快速开断特征满足高压大容量直流系统需求。该文针对模块化混合式直流断路器拓扑,详细阐述了其构成、基本原理与技术特点,完成了设计参数数学解析。结合舟山五端直流和张北直流电网应用需求,开发200kV和500kV等级直流断路器,开展部件功能与整机型式试验。建立PSCAD仿真模型,分析直流断路器应用于舟山工程开断性能,实现了200kV直流断路器工程运行,完成系统故障电流和人工短路试验电流开断。试验和运行结果验证设计正确性及样机性能,为灵活可靠的多端及直流电网建设提供了技术支撑。The multi-terminal high voltage direct current(HVDC)and DC grid provide an efficient solution for improving the integration and consumption of large-scale renewable energy.The DC circuit breaker(DCB)is the core equipment for DC grid construction which can achieve fast isolation of DC faults in grid.Hybrid DCB takes advantage of both traditional mechanical and solid-state breakers,the low-loss and fast-breaking characteristics are suitable for high-voltage and large-capacity DC transmission system.The paper proposed a modular hybrid DCB topology,the operation principles as well as technical features were elaborated in detail.The mathematical analysis of DCB parameter design was given.Combined with the application requirements of Zhoushan five-terminal DC and Zhangbei DC grid,200 kV and 500 k V DCB was developed,then the DCB component and prototype test were carried out.The PSCAD simulation model was established to analyze the performance of DCB in Zhoushan project,and 200 k V DCB was put into operation which successfully interrupting the system short-circuit fault current and the short-circuit test current.The test and operation results verify the design correctness and prototype performance.The technology presented in the paper provides strong support for flexible and reliable multi-terminal DC and DC grid construction.

关 键 词：多端柔性直流 直流电网 混合式直流断路器 样机开发 短路试验 

分 类 号：TM561[电气工程—电器]