For analyzing the impact mechanism about the power systems of additional controllers added in static var compensator (SVC) and obtaining the modern control methods that can be used from the perspective of the engineering application, the operational characteristics of static var compensator (SVC) and the impact mechanism about the power systems of additional controllers added in SVC are introduced. The operational characteristics of static var compensator (SVC) and the impact mechanism about the power systems of additional controllers added in SVC are introduced. On the basis of researching the theory and application status of nine control methods used in the SVC, the comparisons of control effects between the control methods used in SVC for different control targets are completed. Eventually, from the angle of engineering application and development prospect, several feasible advanced SVC control methods are raised.