含无功补偿装置的风电并网系统暂态电压稳定性研究

摘要

ABSTRACT:To deal with the problem of transient voltage stability in the power system integrated with large-scale wind farms,this paper discusses the mechanism of transient voltage instability and the analysis method of transient voltage stability. Meanwhile,it introduces two important reactive power compen-sation devices that are SVC and STATCOM. The BPA software is used for the simulation analysis of an actual national power grid. The results show that wind speed variation and system short-circuit fault can affect transient voltage stability of power system,resulting in a reduction of the system voltage level. Both SVC and STATCOM can give support to the system voltage, and the support effect of STATCOM is more obvious.%针对大规模风电并网后系统的暂态电压稳定性问题，阐述了暂态电压失稳的机理以及暂态电压稳定性的分析计算方法，介绍了2种重要的无功补偿装置SVC和STATCOM。采用BPA软件对国内某一实际电网进行了仿真分析，结果表明，风速变化和系统发生短路故障均会对系统的暂态电压稳定性造成影响，导致系统的电压水平降低。装设SVC或STATCOM对系统电压均有支撑作用，且STATCOM对电压的支撑作用更加明显。