并网型风电场电压稳定研究

Study of voltage stability for grid-connected wind farms

为解决风电场并网运行存在的电压稳定问题,通过对风电机组无功电压特性的研究,提出了无功补偿电容器容量的不同计算方法和投切方式。结合风电无功需求的特点,确定并分析了带有FC的TCR型无功补偿器(SVC)的原理及特性。对某实际风电场应用SVC无功补偿优化结果的分析表明:它可提供动态的电压支撑,能够稳定风电场节点电压,降低风电功率波动对电网电压的影响,很好地改善系统的运行性能。

To solve the voltage stability problem of the grid-connected wind farm, various calculation methods for the capacity of the reactive compensation capacitor as well as its switching modes are proposed based on the var-voltage characteristics of the wind turbine generator. According to the reactive power demand features of the wind power, the working principle and characteristics of the TCR with FC （ SVC ） are identified and analyzed. The reactive compensation results of a wind farm by using SVC show that the SVC can provide dynamic voltage support, stabilize the node voltage of the wind farm, and reduce the impact of wind power fluctuation on the grid voltage.