SHEN HONGMING, SONG XUANKUN, XIAO ZHIHONG, et al. Analysis on the Influence of Commutation Failure on Voltage Disturbance in AC and DC System and Countermeasures. [J]. Power capacitor & reactive power compensation, 2018, 39(5): 81-86.
SHEN HONGMING, SONG XUANKUN, XIAO ZHIHONG, et al. Analysis on the Influence of Commutation Failure on Voltage Disturbance in AC and DC System and Countermeasures. [J]. Power capacitor & reactive power compensation, 2018, 39(5): 81-86. DOI: 10.14044/j.1674-1757.pcrpc.2018.05.015.
交直流系统受端故障对送端电压扰动影响及对策研究
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。
Abstract
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 indetail. The mechanism of the sending end over voltage due to communication failure and DC block is re-vealed. It is shown by the analysis result that the main reason of over voltage is due to the reduction of pow-er factor of AC system at the sending end and no real time adaption of the reactive power device to the opera-tion of grid. The measures on solving such problem as large scale wind power offline due to the sending over-voltage is proposed further and
finally
the correctness of the conclusion is verified by PSACD/EMTDCsimulation.
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
Keywords
high-voltage direct current transmission(HVDC)commutation failureDC sending endvoltage stabilitywind power offline