4象限变频器网侧滤波器的设计与探讨

Design and Discussion on Grid Side Filter of Four Quadrant Converter

网侧滤波器是4象限变频器能量双向流动的关键,该滤波器的设计要考虑性能和成本的因素,在满足性能要求的基础上必须选择合适的参数将网侧滤波器性价比做到更优。使用谐波分析法设计L和LCL两种网侧滤波器,并比较2个滤波器在参数上的差异,得出LCL滤波器的成本优势所在;再通过实验验证LCL滤波器性能上满足要求,而且比L滤波器更优。从理论和实验两方面分析验证了LCL滤波器设计的正确性和实用性。

The grid side filter is the key to a double-direction flow of energy in a four-quadrant converter,and twokinds of factors including performance and cost must be considered. Based on meeting the performance requirementswe have to achieve the suitable parameters selection so as to make more value. Two grid side filters including L andLCL were designed through harmonic analysis,and compared the differences on the two filter parameters,the costadvantages of LCL filter was derived. Then the experiments show that performance of LCL filter meets the requirementand better than L filter. The correctness and practicability of the LCL filter design are verified through theory andexperiments in this article.