中国电机工程学报2017，Vol.37Issue(12)：3391-3399,9.DOI:10.13334/j.0258-8013.pcsee.161156
张北柔直电网工程直流线路短路过程中直流过电压分析
Analysis of DC Overvoltage Caused by DC Short-circuit Fault in Zhangbei VSC-Based DC Grid
摘要
Abstract
To resolve the problems of large-scale and long-distance renewable energy integration in China,State Grid Corporation of China intends to build a 500kV four-terminal VSC-based DC grid demonstration project in Zhangbei.This is the first DC grid in the world and is also the first application of the DC circuit breaker.When a short circuit fault occurs in a DC line,the station near the fault will be locked in several microseconds.Then,the DC circuit breakers trip the fault line.Overvoltage will occur at DC port of the locked station caused by charging of another DC line for its submodules.The DC overvoltage is specific in VSC-based DC grid with DC circuit breakers.This paper analyzed the DC overvoltage caused by DC short-circuit fault at sending end and receiving end in Zhangbei VSC-based DC Grid and presented its mechanism and dynamic process in detail.At the end appropriate measures were given to reduce the overvoltage.关键词
柔性直流电网/直流断路器/直流过电压/能源互联网Key words
VSC-based DC grid/DC circuit breakers/DC overvoltage/energy internet分类
信息技术与安全科学引用本文复制引用
李英彪,卜广全,王姗姗,云雷,赵兵,王铁柱,杨大业..张北柔直电网工程直流线路短路过程中直流过电压分析[J].中国电机工程学报,2017,37(12):3391-3399,9.基金项目
国家电网公司科技项目《±500kV柔性直流电网运行特性与控制技术研究》 （）
国家重点研发计划智能电网技术与装备重点专项(2016YFB0900600).Supported by Technology Projects of State Grid Corporation of China （2016YFB0900600）
Key Project of Smart Grid Technology and Equipment of National Key Research and Development Plan of China(2026YFB0900600). （2026YFB0900600）
