中国电机工程学报2016，Vol.36Issue(19)：5122-5133,12.DOI:10.13334/j.0258-8013.pcsee.151236
多端VSC-HVDC直流线路故障限流及限流特性分析
Fault Current Limitation and Analysis of Current Limiting Characteristic for Multi-terminal VSC-HVDC DC Lines
摘要
Abstract
The fault current of DC line in multi-terminal HVDC system based on voltage source converters (VSC) increases quickly with large peak, while the DC circuit breaker with large capacity and fast breaking speed is still under development. Combined with the capacity level of DC circuit breaker breaking, a current limiting circuit was proposed to limit the peak and rising rate of fault current by connecting it to DC line ends. Theoretical calculation method for the circuit parameters was also given. The analysis results about the circuit and the comparison with other methods show that the proposed circuit is able to limit the fault current effectively and reduce the requirement for DC breaker capacity and speed. Based on the circuit, a fault-handling scheme for DC lines in multi-terminal VSC-HVDC was proposed. The simulation results show that the proposed scheme is capable of limiting fault current of DC lines and parallel diodes effectively, and non-fault system can maintain normal operation after fault clearance, indicating that the handling ability of multi-terminal VSC-HVDC system for DC fault is enhanced effectively.关键词
多端高压直流系统/故障限流/故障处理/故障恢复/电容放电Key words
multi-terminal high voltage direct current system/fault current limiting/fault handling/fault recovery/capacitor discharge分类
信息技术与安全科学引用本文复制引用
刘剑,邰能灵,范春菊,郑晓冬,唐跃中..多端VSC-HVDC直流线路故障限流及限流特性分析[J].中国电机工程学报,2016,36(19):5122-5133,12.基金项目
国家自然科学基金项目(51377104，51407115)。 Project Supported by National Natural Science Foundation of China (51377104,51407115) （51377104，51407115）
