Adaptive virtual inertia control of energy storage doublyfed condenser considering the gradual recovery of rotational speed

Abstract Under virtual inertia control, energy storage doubly-fed condenser can actively provide frequency support using rotor kinetic energy when the system is disturbed. However, due to the fixed coefficient of traditional virtual inertia control, it is difficult to balance the speed recovery of the condenser with system frequency stability and dynamic characteristics. Therefore, this article proposes an adaptive virtual inertia control method that considers the gradual recovery of condenser rotation speed. Firstly, the basic principles and virtual inertia control of energy storage doubly-fed condenser are analysed; Then, based on the real-time status of the camera speed, system frequency, and their rate of change in response to different types of load fluctuations, the condenser is adaptively controlled. This strategy allows the condenser to balance speed recovery during frequency periods; Finally, the effectiveness and superiority of the control strategy proposed in this paper were demonstrated through simulation verification. The simulation results show that the proposed control strategy improves the frequency response characteristics of the system and achieves gradual recovery of rotor speed.