Method for predicting virtual inertia voltage stabilization by battery test energy-saving DC micro-grid model

The invention relates to a method for predicting virtual inertia voltage stabilization by a battery test energy-saving DC micro-grid model. The method is mainly applied to a DC micro-grid composed of a power battery pack test system, and the problem that the DC bus voltage fluctuation is too large due to frequent charging and discharging in the battery test process is solved. The method comprises the following steps: introducing virtual inertia control by adding a virtual capacitor, predicting and calculating an optimal reference current compensation amount through a model prediction controller in combination with model prediction control, and then superposing the optimal reference current compensation amount to virtual reference current in the virtual inertia control so as to further suppress DC bus voltage fluctuation; finally, putting into an L-type bidirectional AC-DC grid-connected converter using double closed-loop control of voltage and current, and in a transient process causing the voltage fluctuatio