Direct current sending end transient overvoltage suppression method and related device

The invention discloses a DC sending end transient overvoltage suppression method and a related device, and the method comprises the steps: calculating reactive power which needs to be provided by a wind power plant for controlling the voltage of a grid-connected point of the wind power plant within a reasonable range after commutation failure, and distributing the reactive power which needs to be provided by the wind power plant, the working mode of the fan is changed according to the current wind speed of the fan and the distributed reactive power, reactive power output of the fan is controlled through active power reduction, the power adjusting effect of wind power in the wind-thermal bundled direct current delivery system is achieved, and transient overvoltage of the direct current delivery end is restrained. 本发明公开了一种直流送端暂态过电压抑制方法及相关装置，本发明在换相失败后，计算将风电场并网点电压控制在合理范围内的风电场需提供的无功，并对风电场需提供无功进行分配，根据风机当前风速和分配到的无功更改风机的工作模式，通过有功削减控制风机无功输出，发挥风电在风火打捆直流外送系统中的功率调节作用，抑制直流送端暂态过电压。