主动参与惯性调频的船舶变频负载电机-电容协同控制方法

Active Inertia Control Strategy for Variable Speed Load Participating in Ship Microgrid Frequency Regulation

针对船舶变频负载参与系统惯性调频的难题,该文提出变频负载电容储能-电机转速协同的模型预测控制策略,实现变频负载中不同惯量资源主动响应和协同优化综合电力系统的动态频率。建立系统频率-电机转速-电容电压状态空间方程,提出电机-电容惯量响应系统频率变化的控制机理;建立考虑负载运行约束的系统频率预测模型,提出计及频率动态响应以及电机-电容最优调控性能的代价函数,并给出基于频率偏差约束的权重参数优化方法,实现变频负载的主动响应及电机-电容的协同控制。建立船舶综合电力系统RT-LAB半实物仿真模型,试验表明所提方法有效提升了电机-电容的自适应协同能力,使变频负载充分参与频率动态调节。

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.