Method for compensating rotational inertia of fan dynamic model experiment platform based on energy flow equivalence

The invention discloses an energy flow equivalence-based rotational inertia compensation method for a fan dynamic model experiment platform. From the perspective of energy, an energy flow direction of an actual wind turbine generator is reproduced on a fan dynamic model experiment platform, a rotational inertia compensation strategy based on energy flow equivalence is provided, the rotational inertia of the fan dynamic model experiment platform is obtained, and the compensation torque is calculated by directly utilizing theoretical values of the pneumatic torque and the electromagnetic torque. The method comprises the following steps of: calculating and correcting an actually issued pneumatic torque instruction, respectively acquiring communication time lag of a dragging side control loop and a tested side control loop of a fan dynamic model experiment platform, and finally determining parameters of a time delay alignment module according to a measurement result. Compared with a traditional rotational inertia