新型注入式混合有源滤波器的数学模型及电流控制方法

有源滤波器的数学模型是进行稳态、动态及电流控制方法等方面研究的基础,本文以新型注入式混合有源滤波器为例,详尽分析了建立其数学模型的方法,结合双滞环电流控制方法响应速度快、开关损耗低的优点和递推积分PI控制方法无稳态误差的特点,提出了一种新的复合型电流控制方法.通过仿真,从跟踪速度、控制精度和开关次数三个方面,将新的控制方法与双滞环电流控制方法以及单一的递推积分PI控制方法进行了对比研究.实验结果也证明了该数学模型的正确性和复合型电流控制方法的有效性.

Study on Mathematic Modeling and Current Control Method of New Injection Type Hybrid Active Power Filter

The mathematical model of active power filter is the studying foundation of steady state,dynamic state and current control method. This paper takes a new injection type hybrid active power filter as an example,and expatiates on how to constitute the mathematical model. The recommended modeling approach maybe offers some reference for modeling of other active power filters. Whether or not active power filter can eliminate harmonic current of the power network according to anticipation,the performance of current control method mostly determines the effect. This paper combines the double hysteresis control with recursive integral control. With this new control method,this paper simulates its effect,and compares with traditional double hysteresis control and single recursive integral control. Experiment results verify the validity of this new control algorithm.