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Energy storage systems can reduce output fluctuations of distributed power sources and improve their absorption capacity. A modified virtual synchronous control method for energy storage inverters is proposed to improve distributed photovoltaic absorption. In response to the active power oscillation problem in traditional control, the external characteristic reactance is increased to increase the system damping coefficient and achieve rapid compensation after power disturbance. Aiming at the problem of reactive power allocation in traditional control, it is proposed to use AC bus voltage as the reference value for excitation control, provide an estimation method for bus voltage, and achieve power decoupling and accurate allocation of reactive power in various parallel inverters. The effectiveness of the proposed control strategy was verified through MATLAB/Simulink simulation.
Feng et al. (Thu,) studied this question.