Model Predictive Control of Virtual Synchronous Generator Under Grid Voltage Imbalance
Virtual synchronous generator(VSG)control algorithm can provide inertia for the grid and assistance for volt-age and frequency regulation.However,when the grid encounters voltage imbalance,it will lead to the inequilibrium of grid-connected current and the fluctuation of active and reactive power,which seriously affects the quality of grid-connect-ed power.To solve this problem,this paper proposes a model predictive control method for virtual synchronous generator under grid voltage imbalance.The proposed control method uses a strategy based on fast voltage vector selection to control the reconstructed positive and negative sequence current components,so as to achieve the control objectives of constant ac-tive power,constant reactive power and current equilibrium.In addition,the regulation coefficient of negative sequence current is introduced,thereby realizing coordinated control of these three objectives.
VSGgrid voltage imbalancemodel predictive controlpower fluctuation suppressionnegative sequence current
万方数据
维普
