双积分控制策略研究及在单相并联APF中的应用

为了解决电压跟踪的快速实时问题,针对电压型逆变器提出了双积分控制。双积分控制在电压跟踪上只需要一个比较器及两个带重置功能积分器,其方法原理较简单有利于实际应用。为了扩展双积分控制的应用范围,设计了基于负载电流检测的前馈控制器将电压跟踪问题转换为电流跟踪问题。双积分控制可以应用于并联有源滤波器的设计,使并联滤波器的输出电流跟踪参考电流;由于积分器的作用,双积分控制亦可以抑制直流侧电压波动产生的干扰。但是双积分控制的信号输出频率不固定,延时环节的设计可使双积分控制输出信号的频率集中于一个高频范围,通过无源滤波器的设计进行滤除。双积分控制器控制精度高、动态响应迅速并且鲁棒性强。仿真实验结果验证了所提控制策略的有效性及可靠性。

Double Integration Control and Its Application in Single-Phase Shunt Active Power Filter

Double Integration Control (DIC) is proposed to realize the fast real-time voltage tracking of voltage-source inverter. This control strategy only needs one comparator and two integrators with reset in voltage tracking. The DIC strategy can be easily utilized in practical application due to its simplicity. To expand the application range of double integration control, a feed-forward controller based on current detecting is constructed to convert current tracking into voltage tracking. Thus, double integrati...