三相四线制有源电力滤波器双重化设计的研究

Study on the Duality of the Three-phase Four-wire System APF

文章采用载波移相的双重化技术,在保持主电路拓扑结构及不提高逆变桥开关频率的前提下,获得了较高的等效开关频率、更大的容量及其更好的谐波补偿效果。介绍了SPWM多重化原理在并联型三相四线制有源电力滤波器中的应用,以及APF的谐波提取及其控制策略的优化设计。最后采用双重化原理研制了一台容量为150kVA的有源电力滤波器工程样机。实验结果表明:整个系统稳定可靠,电气性能满足技术要求,补偿效果明显。

The dual technology of carrier wave shifting was adopted in this paper, not only the higher equivalent switching frequency was obtained under the condition of invariant main circuit topology and no improvement in the switching frequency of the inverter, but the greater capacity and the well harmonic compensation. The multi-change principle of the SPWM was introduced, which is applied in the APF of parallel three-phase four-wire system. Then the APF harmonic drawing and the optimal design of its control strategy was also given in the paper. According to the double change principle, the APF engineering prototype with 150kVA is developed in the end, the experimental results show that the entire system is steady and reliable, its electrical performance can satisfy the technical requirements and compensation effect is obvious.