具备潮流控制功能的多端口混合式直流断路器  

Multi-port Hybrid DC Circuit Breaker With Power Flow Control

作　　者：史雪亚 王鹤[1] 边竞[1] 关佳欣 SHI Xueya;WANG He;BIAN Jing;GUAN Jiaxin(School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,Jilin Province,China)

机构地区：[1]东北电力大学电气工程学院,吉林省吉林市132012

出　　处：《现代电力》2020年第6期598-604,共7页Modern Electric Power

基　　金：国家自然科学基金项目(51677023)。

摘　　要：针对多端柔性直流电网的故障保护和潮流控制问题,该文提出一种具备潮流控制功能的多端口混合式直流断路器,由通流支路、主断路器支路两部分构成。当系统正常稳态运行时,该断路器具有潮流控制功能,可用于调节支路潮流;系统发生故障后,相当于混合式直流断路器,用于切断故障电流。建立了具备潮流控制功能的多端口混合式直流断路器拓扑,阐述了稳态和暂态运行机理,并进行经济性分析。最后,在PSCAD仿真平台搭建了四端直流输电系统,验证了所提拓扑在潮流控制和故障切除方面具有良好的性能。Aiming at the fault protection and power flow control problems of the multi-terminal flexible DC grid,this paper proposed a multi-port hybrid DC circuit breaker with power flow control function.The proposed breaker consists of two parts:the through-flow branch and the main breaker branch.When the system is in the steady state operation,it has a power flow control function,which can adjust the branch power flow;when the system fails,the structure is equivalent to a hybrid DC circuit breaker for cutting off the fault current.A multi-port hybrid DC circuit breaker topology with power flow control function was established;the steady-state and transient operation mechanism were elaborated;and the economic characteristicswere analyzed.Finally,a four-terminal DC transmission system was built on the PSCAD simulation platform to verify the proposed topology,which has good performance in power flow control and fault removal.

关 键 词：直流电网 潮流控制 故障保护 多端口 直流断路器 

分 类 号：TM56[电气工程—电器]