一种基于DQ变换的解耦滞环控制  

A Decoupling Hysteresis Control Based on DQ Transformation

作　　者：庞滨洋 刘宜成[1] 陈展坤 刘欣燚[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《测控技术》2015年第10期85-88,共4页Measurement & Control Technology

摘　　要：针对传统滞环控制方法无法对有功与无功功率进行解耦的缺点进行了研究。提出了一种基于DQ变换的解耦滞环控制方法,并将其应用于单相并网逆变器中。该方法对采样的电流信号进行DQ变换后,分别对DQ轴的信号进行控制。最后将这两个控制量进行DQ反变换后送入滞环比较器中,由此获得开关信号。系统整体结构上采用电压外环电流内环的双闭环控制,内环在完成功率解耦的同时还加入了对电网的无功功率补偿。在保持了滞环控制的快速性与抗干扰性的同时还完成了对有功与无功功率的解耦控制。Matlab的仿真和实验结果验证了所提出控制方法的有效性。The disadvantage of the conventional hysteresis control that can not decoupling of active power and reactive power has been studied. A decoupling hysteresis control based on DQ transformation is proposed and applied to single-phase grid-connected inverter. With the DQ transformation for the sampling current signal, the signals of the DQ axes are controlled respectively. After DQ inverse transformation of two control variables, they are sent into the hysteresis comparator, thereby obtaining the switch signals. In the whole structure, the dualloop which contains outer voltage loop and current inner loop is adopted. Besides accomplishing the power decoupling, the inner loop is able to compensate the reactive power of the grid. The inverter system not only keeps the rapidity and anti-jamming of hysteresis controller, but also decouples the active and reactive of the output power. Simulation and experimental result validated the proposed controlling method.

关 键 词：单相并网逆变器 DQ坐标变换 滞环控制 解耦控制 无功补偿 

分 类 号：TM615[电气工程—电力系统及自动化] TM464