LC-Type Energy Storage Converter and State Feedback Control Strategy Adapted to New Energy Power Station

In order to meet the power compensation requirements of new energy power stations, an LC series filter based converter is proposed, which is connected to the grid through an LC series filter branch. The LC series filter can reduce the operating voltage of the system while maintaining the output power of the converter, and improve the active capacity and efficiency of the system. the working principle of the LC-type converter is analyzed, and then the relevant mathematical model is established. Due to the consideration of the output filter, the order of the system and the complexity of the control system increase. Aiming at this problem, the discrete state model of LC-type converter is established. At the same time, a state control method for LC series filter converter is proposed, which effectively improves the system damping of LC series filter at resonant frequency, thereby improving the control performance of the system. Finally, the simulation model of LC converter is built in PSIM, which verifies the advantages of LC filter converter and the feasibility of state feedback control strategy.