The second harmonic voltage is existed in the voltage of DC side in case of operation of single phase SVG

the second harmonic voltage can generate the third harmonic voltage after modulation

thus keeping the output current of SVG contain the third harmonic

the third harmonic current will cause the pollution to the power grid and increase the capacity of the inverter.In this paper the measures of adding band-rejection filter in the voltage controlling loops to suppress the third harmonic current are proposed on the basis of analyzing the generating cause in the single phase SVG output current

simulation model is established

the simulation results are compared

the influence of band rejection filter on voltage control of DC side is analyzed.It is shown that the scheme has stronger suppression function to the output third harmonic current.