一种适用于机车PWM整流器的比例积分-谐振电流控制器设计  

A Tuning Method for Proportional Integral-Resonant Current Controller in Locomotive PWM Rectifiers

作　　者：游小杰[1] 杨才伟 王剑[1] 王琛琛[1] 原志强 You Xiaojie;Yang Caiwei;Wang Jian;Wang Chenchen;Yuan Zhiqiang(School of Electrical Engineering Beijing Jiaotong University,Beijing 100044 China;CRRC Datong Co.Ltd,Datong 037038 China)

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]大同电力机车有限公司,大同037038

出　　处：《电工技术学报》2021年第23期4926-4936,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51977006)。

摘　　要：随着宽禁带开关器件的发展,机车中PWM整流器的开关频率逐渐提高,并网滤波器的电感和体积可随之减小,此时PWM整流器的电流控制不仅要对基波电流快速响应,也需要快速抑制直流偏置和由牵引网谐波电压造成的谐波电流。该文选用比例积分(PI)和多个矢量比例积分(VPI)控制器分别控制直流信号和基波、各次谐波交流信号。但是由于各控制器的增益相互耦合,共同影响系统的动态性能,传统增益设计方法很难应用。因此基于Nichols图提出一种增益设计方法,将增益设计转变成最小幅值裕度和相位穿越频率设计,实现增益的解耦;通过优化调整时间和超调选取最终参数,优化动态响应,并通过实验验证,使用该设计方法调优后的系统拥有良好的稳定性、动态性和鲁棒性。With the development of wide-bandgap semiconductors, the switching frequency of locomotive or EMU PWM rectifiers is increasing, and the gird-tied filter is reduced correspondingly.Therefore, the current control in PWM rectifier must not only respond fast to the fundamental current reference, but also quickly suppress the DC bias and harmonics generated by the grid voltage. Hence,proportional integral(PI) plus multiple vector proportional integral(VPI) controllers are used in this paper to control these signals. However, because the gains of PI and multiple VPI are coupled with each other and affect the system performance together, it is difficult to use traditional gain tuning methods.Therefore, a gain tuning method based on Nichols chart is proposed to achieve the gain decoupling, and the gain design is transformed into the tuning of minimum gain margin and phase crossover frequency.The settling time and overshoot are considered for the optimal gain tuning. The experimental results show that the designed system has good stability, transient performance and robustness.

关 键 词：电流控制 谐振控制器 PWM整流器 增益设计 

分 类 号：TM461[电气工程—电器]