Aiming at the voltage rise due to the photovoltaic generation system(PVGS)at the point of common coupling(PCC),the cause is analyzed with power transmission theory.The principle and strategies of voltage regulation based on active and reactive power in PVGS are analysed,then a dynamic voltage regulation strategy based on transient voltage and current control is proposed.Particularly,a 3 kW PVGS experimental platform is developed for the IQ(U)voltage regulation strategy based on transient voltage and reactive current.The experimental results validate the effectiveness of the proposed IQ(U)control scheme for voltage regulation.