【摘要】 提出一套三相电压型PWM整流器网侧LCL滤波器的设计方法。与传统的L滤波器相比,该设计可以降低电感量,提高系统动态性能,降低成本。在中大功率应用场合,其优势更为明显。在详细阐述各元件的取值原则与计算步骤的基础上,给出了设计实例,并对所设计的LCL滤波器进行了仿真和实验验证。实验结果表明,经过LCL滤波,系统在保证网侧高功率因数的同时电流谐波成分大为削弱,从而验证了该设计方案的优越性。更多还原

【Abstract】 A design method for the grid-side LCL-filter of three-phase voltage source PWM rectifier is presented,which allows to use reduced values of inductance,improve system dynamic performance and reduce cost compared to traditional L-filter. These advantages are even more attractive in middle and high power applications. In this paper,the design criterion and calculation procedures are introduced in detail. A design example is reported,and the obtained LCL-filter is realized and tested by simulation and experiments. Experimental results show that the obtained LCL-filter can provide sufficient attenuation of current harmonics and meanwhile ensure a high grid-side power factor. The advantages of this design method are demonstrated.更多还原