Active Inertia Control Strategy for Variable Speed Load Participating in Ship Microgrid Frequency Regulation
To address the challenge posed by variable speed loads participating in frequency regulation,we propose a model predictive control strategy that integrates coordinated capacitor energy management and motor speed regulation.This strategy aims to achieve active responses of DC voltage and speed,thereby optimizing system dynamic frequency.A frequency-voltage-speed state space model is established to reveal the mechanism of regulating motor and capacitor energy storage.A frequency prediction model considering operation constraints is established,and a cost function is proposed considering frequency dynamic response and optimal regulation performance of motor-capacitor.Additionally,an optimized weighting factor tuning method based on frequency regulation demand is proposed,which achieves coordinated control of motors and capacitors.Finally,a ship integrated power system is established on the RT-LAB experimental platform.Experiments show that the scheme achieves adaptive coordinated control while enabling the variable speed loads to fully participate in frequency dynamic regulation.
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