动车组网侧变流器改进型dq解耦控制方法研究  

Research of Line-side Converter in Motor Train Based on Modified dq Decoupling Control

作　　者：阮白水[1] 张钢[1] 蒋李晨昕 刘志刚[1] 

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《铁道学报》2015年第12期25-30,共6页Journal of the China Railway Society

基　　金：国家科技支撑计划(2013BAG21QB00);国家自然科学基金(U1134204);中央高校基本科研费专项资金(2013YJS088)

摘　　要：dq解耦控制方法可以实现四象限变流器有功和无功分量的分别控制,将其应用于动车组网侧变流器的控制中可以使列车发出所需的无功功率,从而减小列车运行过程中网压波动对其造成的影响。传统网侧变流器dq解耦控制中由于延时分量的引入,使其动态过程减慢,并且会带来较大的波动。针对这种情况,本文提出两种改进的旋转坐标系下的解耦控制方法:第一种为旋转坐标系下的瞬时电流控制,该方法结合瞬时电流控制的思想以及网侧变流器在旋转坐标系下的数学模型,与传统dq解耦控制相比有更快的响应速度,但却难以实现网侧电流的无静差控制。第二种为短延时的dq解耦控制方法,即在传统dq解耦控制方法的基础上增加一个虚拟电流快速计算单元,用该单元替换原来的延时单元来获取虚拟电流,从而加快其动态性能。通过大功率试验验证了两种控制方式的有效性。The individual control of active and reactive power in four-quadrant converter can be achieved by the adoption of dq decoupling control method. The application of this control method in the control of the line-side converter enables the train to generate reactive power required, thereby reducing the impact of voltage fluctua- tions of the traction line on the train during its operation. However, the introduction of delay component in tra- ditional dq decoupling control method deteriorates the dynamic response, which becomes slower and oscilla- tory. To address the situation, two modified decoupling control strategies under the rotating coordinate system were proposed in this paper： The first one is the instantaneous current control based on the rotating coordinate system, which combines the idea of instantaneous current control and the mathematical model of the network- side converter in the rotating coordinate system, and has the advantage of faster dynamic response, compared with traditional dq decoupling control. But this control method can hardly achieve zero steady state error con- trol. The second one is the short delay dq decoupling control method. By replacing the original delay unit with a virtual current fast calculation unit, added to the traditional dq decoupling control method, to obtain virtual zurrent, the dynamic performance of the line-side converter was greatly improved. At last, high power test re- sults verified the validity of the two control methods.

关 键 词：网侧变流器 dq解耦控制 瞬时电流控制 虚拟电流快速检测 

分 类 号：TM46[电气工程—电器]