摘要
提出了一种LCL型滤波器的设计方法，利用电流的纹波限制，求出滤波器的总电感值。由于滤波电容将电感分为电网侧和变换器侧两部分，首先利用电容吸收的无功功率得到滤波电容器的值；然后以谐振频率作为中间变量，得出关于电感比例的二次方程，通过方程的求解，得出滤波器的电感参数。通过对1．5MW风电系统样例滤波器的设计过程进行的详细介绍、参数计算和系统仿真，结果证明了文中提出的设计方法是可行的。
It is very effective for LCL type filter to attenuate high order harmonics of PWM rectifier, which makes it statable for higher power applications. However, 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 divided 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 inductances is deduced with resonance frequency as a middle variable. Parameters of two inductances 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 in 1.5MW system.
出处
《上海电器技术》
2008年第3期51-55,共5页
Shanghai Electric Appliance Technology
