In the power quality control of power grid

such switching compensation devices as static var generators are used widely and the calculation of reference current is an important factor affecting its compensation efficiency. In this paper

a kind of new method for calculating SVG reference current is proposed with combination of currents’ physical components. In the method

weight factor related to the current component is introduced

thus those independent current component can be combined flexibly to calculate reference current of SVG at different compensation target and

at the same time

selective compensation target can be achieved as per actual condition of power grid when SVG capacity is limited and the on-line conversion of the compensation target can be achieved. The feasibility of the method is verified by the simulation and experiment.