Research on Resonance Suppression Strategy of Photovoltaic Inverters in Low Voltage Active Distribution Networks

The grid connection of renewable energy generation represented by photovoltaic is an effective way to alleviate energy crisis and reduce consumption and haze. With the widespread use of photovoltaic inverters in low-voltage distribution networks, additional resonance risks inevitably arise. To address the resonance problem of low-voltage active distribution networks containing photovoltaic inverters, an equivalent circuit model of low-voltage distribution networks containing photovoltaic inverters is constructed, and a resonant suppression strategy for photovoltaic inverters in low-voltage active distribution networks based on dual current closed-loop active damping is proposed. The experimental results show that this method can suppress the resonance of photovoltaic inverters in low-voltage active distribution networks.