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Dual-loop Cooperative Control Strategy for Power Conversion System

In view of the application requirements of power conversion system (PCS) under different working conditions, a control strategy of PCS with DC voltage loop and constant power loop synergizing outer loop and current inner loop is designed. It solves the problem of voltage and current dynamic oscillation caused by traditional methods in mode switching (constant voltage mode, constant power mode). This strategy prevents the over-voltage or under-voltage of the PCS bus voltage during the switching process from causing battery over-current damage and improves the stability of the system. By building a Matlab/Simulink simulation platform, the stable operation of the PCS during power scheduling and mode switching is verified.