【摘要】 提出了一种LCL型滤波器的新型设计方法,利用电流的纹波限制,求出了滤波器的总电感值。滤波电容使电感分为两个不对称的电感,利用电容吸收的无功功率得到了滤波电容器的值。以谐振频率这个重要参数作为中间变量,得出了关于两个不对称电感比例的二次方程,通过对方程的求解,可很容易得到滤波器的电感参数。对样例滤波器的设计过程进行了详细介绍,系统的仿真结果也证明了文中提出的设计方法是可行的。更多还原

【Abstract】 It is very effective for LCL type filter to attenuate high order harmonics of PWM rectifier, which makes it suitable for higher power applications. Hower, LCL filter design is complex and needs to consider many constraints. This paper proposes a novel method for LCL filter design, which makes the task very convenient. The total inductance should be determined according to current ripple constraint. Total inductance is split into two unsymmetrical parts with filter capacitor insertion. Filter capacitor can be obtained with reactive power constraints. A second order equation on ratio of two inductance is deduced with resonance frequency as a middle variable. Parameters of two inductance will be gotten with second order equation.A step by step design procedure is described as a design example,which is verified by result of simulation.更多还原