高电压技术2018，Vol.44Issue(2)：337-346,10.DOI:10.13336/j.1003-6520.hve.20180131001
中高压直流开断技术
Medium and High Voltage DC Breaking Technology
摘要
Abstract
DC power grid has wide application prospects in the high-voltage flexible transmission as well as in the access to new energy,track traction,and the future urban distribution networks.As the crucial equipment for the control and protection,DC circuit breaker is an important guarantee for the DC grids security.Compared with AC interruption,DC interruption has higher requirements and its implementation is more difficult.According to the differences of breaking principles and methods,there are mainly three types of DC circuit breaker (DCCB),i.e.,air DCCB,current injection DCCB,and hybrid DCCB.These DCCBs are reviewed in detail,including the introduction of principles and operations of breaking concepts and the analyses on the latest technological achievements in the breaking of medium-voltage (MV) and high-voltage (HV) DC current.The air DCCB realizes the current breaking by producing a sufficiently high arc voltage,which has been widely used in the low-voltage applications for its simple structure and high reliability.The current injection DCCB achieves the current breaking by injecting a counter current from the energy-storage components,and it has relatively short breaking time and is suitable for MV and HV DC system.The hybrid DCCB utilizes the full-controlled power electronic switches to forcedly cut off the current,which has the favorable properties in the rapid breaking process and is adaptable for various voltage classes.However,the relative high cost of hybrid DC breaker restricts its application.关键词
直流电网/直流开断/直流系统/直流断路器/电流转移/人工过零Key words
DC power grid/DC breaking/DC system/DC circuit breaker/current commutation/artificial current zero引用本文复制引用
吴翊,荣命哲,钟建英,杨飞,吴益飞,韩桂全..中高压直流开断技术[J].高电压技术,2018,44(2):337-346,10.基金项目
国家重点基础研究发展计划(973计划)(2015CB251001) （973计划）
国家重点研发计划(2017YFB092402) （2017YFB092402）
国家自然科学基金(51521065) （51521065）
国家电网公司科技项目(PDB17201700161).Project supported by National Basic Research Program of China (973 Program) (2015CB251001),National Key Research and Development Plan of China (2017YFB092402),National Natural Science Foundation of China (51521065),Science and Technology Project of SGCC (PDB17201700161). （PDB17201700161）
