VSG Balanced Current Control Method for Electric-Hydrogen Multi-Energy Complementary Integrated Station

Current VSG balanced current control methods for electric-hydrogen multi-energy complementary integrated stations exhibit deficiencies, such as poor suppression of inrush currents in practical applications, difficulty in rapidly mitigating active and reactive power fluctuations, and failure to achieve desired control effects. To address these issues, this study proposes a VSG balanced current control method for electric-hydrogen multi-energy complementary integrated stations. A mathematical model of the VSG is established to describe its operational state. The balance of grid-connected currents is determined based on VSG output power fluctuations, and balanced current control is achieved by suppressing negative-sequence currents, thereby realizing effective VSG balanced current control. Experimental results demonstrate that the proposed method maintains VSG output currents within normal operating ranges, reduces active and reactive power fluctuations within 1 second, and restores them to normal levels, confirming its superior control performance.