【摘要】 为改善船舶轴带发电机的性能,基于LCL滤波器的PWM整流器被应用到船舶轴带发电机系统中.为抑制LCL滤波器的谐振峰值,在不额外增加传感器的情况下,设计一种新颖的电流控制器.通过Luenberger观测器来预测电容电流,然后通过虚拟电阻反馈此电流引入有源阻尼,进而抑制LCL滤波器谐振峰值;在此基础上设计整流电压和变流器侧电流双闭环控制策略,提高整流侧直流电压和变流器侧交流电流的动态响应速度和抗干扰能力;最后通过仿真和实验验证了理论分析的正确性和控制策略的可行性.更多还原

【Abstract】 In order to improve the performance of ship shaft generators,a PWM rectifier based on an LCL filter is applied to the ship shaft generator system. To suppress the resonance peak of the LCL filter,a novel current controller without additional transducers is proposed. The capacitive current is predicted by a Luenberger observer. Through the virtual resistor feedback,the predicted current creates active damping to suppress the resonance peak of the LCL filter. Based on this,the dual-loop control strategy of the rectified voltage and the inverter-side current is proposed to improve the dynamic responding time and the anti-interference ability of DC voltage in the rectifier side and AC current in the converter side. Finally,the correctness of the theoretical analysis and the feasibility of the control strategy are verified by the simulation and experiments.更多还原