摘要
交直流系统受端与送端通过直流控制相互耦合。文章详细分析了换相失败及直流闭锁对送端交流母线电压的影响,揭示了换相失败与直流闭锁导致送端过电压的机理,分析结果表明送端交流系统功率因数降低以及无功补偿装置不能实时适应电网的运行是造成过电压的主要原因,并进一步提出了解决送端过电压可能造成大规模风电脱网的措施,最后基于PSCAD/EMTDC仿真验证了结论的正确性。
The sending and receiving end of AC and DC system are coupled each other through DC control.In this paper,the influence of commutation failure and DC block on the sending end voltage is analyzed in detail.The mechanism of the sending end over voltage due to communication failure and DC block is revealed.It is shown by the analysis result that the main reason of over voltage is due to the reduction of power factor of AC system at the sending end and no real time adaption of the reactive power device to the operation of grid.The measures on solving such problem as large scale wind power offline due to the sending overvoltage is proposed further and,finally,the correctness of the conclusion is verified by PSACD/EMTDC simulation.
作者
申洪明
宋璇坤
肖智宏
刘颖
陈炜
张祥龙
曹靖
SHEN Hongming;SONG Xuankun;XIAO Zhihong;LIU Ying;CHEN Wei;ZHANG Xianglong;CAO Jing(State Grid Economic and Technologicl Research Institute Co.,Ltd.,Beijing 102209,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《电力电容器与无功补偿》
北大核心
2018年第5期81-86,共6页
Power Capacitor & Reactive Power Compensation
关键词
高压直流输电
换相失败
直流送端
电压稳定
风机脱网
high-voltage direct current transmission(HVDC)
commutation failure
DC sending end
voltage stability
wind power offline
作者简介
申洪明(1988—),男,博士研究生,主要研究方向为电力系统控制及保护护技术;宋璇坤(1959—),女,教授级高级工程师,从事电力系统控制与保护技术;肖智宏(1977—),男,高级工程师,主要研究方向为电力系统设计、电子式互感器设计技术等。
