Abstract: This paper expounds the problems existing in Guangdong power grid at the receiving end of West to East power transmission. Combined with the function of dynamic reactive power compensation device, this paper studies the impact of dynamic reactive power compensation device on the voltage, peak cutting and valley filling of reactive power, loss of active power and reactive power, and transient voltage stability of power grid at the receiving end, It provides a theoretical basis for the design and application of dynamic reactive power compensation device in power grid at the receiving end.