In this paper

the development and research status of reactive power compensators both at home and abroad are introduced. Two traditional control methods for H bridge STATCOM are analyzed and the coordination algorithm based on phase shift control and capacitive voltage control is particularly studied.The reactive operation curve for type H STATCOM is obtained throughout the coordination control of traditional phase shift and minimum capacitive voltage and in the premise of reaching the reactive power needed by the grid. The most optimal operation point is obtained by way of multi-objective optimization evaluation of the operation points on the curve. Finally

the effectiveness of the evaluation method is verified by the calculation example and simulation.