The energy storage doubly-fed condenser can not only serve as a reactive power compensation device to enhance the voltage stability of the system

but also increase the system inertia and improve the system frequency response by utilizing the rotor energy storage. Due to the current inertia support methods' weak anti-interference ability and the difficulty in balancing the high inertia characteristic and the fast response characteristic

an inertia support method for the energy storage type doubly fed condenser based on linear active disturbance rejection control is proposed. Based on the analysis of the condenser model and the system frequency response

an inertia support control model is established according to the principle of active disturbance rejection control. Through small-signal analysis

the equivalent inertia of the energy storage doubly-fed condenser under this control method is obtained. Then

by analyzing the Bode diagram of the equivalent inertia transfer function under different parameters

the control parameters are optimized. Finally

the feasibility and effectiveness of the proposed method are verified through simulation examples.