摘要
建立了±500 kV架空线柔性直流电网的电磁暂态仿真模型,较为详细地计算、分析、比较了极间短路等严重故障下的短路电流与换流站闭锁时间。研究结果表明,合理地配置限流电抗器是限制短路电流、防止多个换流站闭锁的有效手段。研究了限流电抗器的配置方案以及改进的限流措施,使得站外直流线路故障不会造成任何换流站闭锁,满足设计与运行的要求。
An electromagnetic transient simulation model of flexible DC grid with ± 500 k V overhead lines is built and the short circuit current and blocking time of converter station are calculated,analyzed and compared in detail for serious pole-to-pole short circuit faults. Results show that the rational configuration of current-limiting inductors is an effective method to restrain the short circuit currents and prevent the blocking of multiple converter stations. The current-limiting inductor configuration schemes and the improved current-limiting measurements are studied to avoid the converter station blocking due to out-station DC line faults,meeting the requirements of design and operation.
出处
《电力自动化设备》
EI
CSCD
北大核心
2017年第2期219-223,共5页
Electric Power Automation Equipment
关键词
架空线
柔性直流电网
短路电流
限流电抗器
换流站
闭锁
overhead line
flexible DC grid
short circuit currents
current-limiting inductor
converter station
blocking
