Research on Control Strategies for Smooth Transition of Microgrid Operation Modes
Based on the master-slave control mode,when a microgrid experiences an unplanned islanding,traditional PQ-V/F control strategies can lead to difficulties in maintaining the stability of the system.By analyzing the causes of electrical quantity shocks within the system during microgrid operation mode switching,an improved Power Conversion System control strategy is proposed.This strategy adds a voltage holding loop in the voltage loop and coordinates with an additional current loop regulator to ensure power balance within the system during islanding detection periods.This effectively addresses the voltage and current shock issues within the system during microgrid operation mode transitions,facilitating smooth mode transitions.A simulation model is constructed using MATLAB/Simulink to compare and analyze the control effects of traditional and improved control strategies,validating the feasibility and effectiveness of the improved control strategy.
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