Control strategy of photovoltaic grid-connected inverter based on virtual synchronous generator
ZHU Geng-hui
CHEN Guo-zhen
HAN Yao-fei
Abstract：Aiming at the problem that the photovoltaic grid-connected inverter in conventional constant power control mode lacks the dynamic adjustment ability of voltage and frequency, a control strategy of photovoltaic grid-connected inverter based on virtual synchronous generator (VSG) was proposed.According to the principle of synchronous generator, the grid-connected equivalent circuit and vector relation expression of synchronous generator were established, the active frequency control algorithm and reactive voltage control algorithm were designed, and the photovoltaic power generation system based on the control strategy of VSG was established.The 10kW photovoltaic grid-connected system was established in Matlab/simulink environment.The simulated results show that the photovoltaic grid-connected inverter based on VSG has the similar frequency and voltage regulation characteristics with the synchronous generator, and can well adapt the requirements of grid operation.
Keywords：photovoltaic invertervirtual synchronous generatorequivalent circuitvector relationactive frequencyreactive voltagefrequency regulationvoltage regulation
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 366-370 )