Calculation method for equivalent virtual inertia time constant of energy storage device

The invention discloses a method for calculating an equivalent virtual inertia time constant of an energy storage device, and the method comprises the steps: defining an energy storage virtual inertia time constant under the control of energy storage additional differential inertia, and quantitatively representing the value of the energy storage virtual inertia time constant through analysis. And in combination with an energy storage inverter control model, discussing a ratio relation between an energy storage charge state change rate and a system synchronization angular velocity variation in an inertia response process, substituting the ratio relation into an energy storage virtual inertia time constant definition formula to obtain a complex frequency domain expression of an inertia time constant, and then obtaining a time domain value through Laplace inverse change. The equivalent virtual inertia time constant of the energy storage device has an obvious dynamic time-varying characteristic which is obviously