A novel adaptive inertia control of virtual synchronous generator for enhancing the response performance of wind-solar-storage combined power generation system

The damage of extreme disasters to power grid is becoming more serious, and energy storage control technology is developing into a measure to improve the resilience of power grid. In this study, a novel adaptive inertia control of virtual synchronous generator is proposed for the control of wind-solar-storage combined power generation system, so as to form the ability of long-term power supply for load. This technology can not only provide inertia for the system, but also dynamically adjust the inertia according to the frequency variation caused by power disturbance, avoiding the rapid rise and drop of frequency in the transient process and increasing the damping of wind-solar-storage combined power generation system when the main network fails. Through the low-pass filtering of the sampled signal and the design of the inertia control law, the frequent inertia adjustment caused by the measurement noise and the random small fluctuation of wind speed can be avoided, and the inertia adjustment amount would not exceed the limit under any large power disturbance. The inertial boundary of the system is discussed according to the primary energy storage capacity and the tolerant power of the inverter. The convergence of the novel adaptive control algorithm is proved. Finally, the simulation model is built on PSCAD / EMTDC platform, and the effectiveness of the proposed control strategy is verified on it.