基于矢量谐振控制的负荷补偿装置研究

Research of Load Compensator Based on Vector Resonance Control

通过对某地区居民、工业两类典型负荷数据的采集,利用电压不平衡和电压偏差两项指标分析了该地区在不同时间段内的负荷数据。针对分析结果所体现的电能质量问题,提出了一种基于矢量谐振控制的三相四线制有源电力滤波器控制策略,同时对比分析了矢量谐振控制器与传统比例谐振控制器的幅频特性和相频特性,仿真结果表明,所提的矢量控制器能在较大范围内保持较高的增益,有良好的频率选择性和较大的稳定裕度。最后,采用提出的控制策略完成了一台实验样机,经现场实测验证了该策略的可行性,电能质量有所改善,实验结果达到预期效果。

The residential and industrial load data were collected from a region, and the load data during different period are analyzed by referring voltage deviation and voltage unbalance degree. According to the power quality problem reflected from the results of the analysis above, this article puts forward a vector-resonance-control-based control strategy for three-phase four-wire APF. Meanwhile, the amplitude-frequency characteristic and phase frequency characteristics of vector resonance controller and proportional resonant controller were compared. The simulation results showed that the proposed vector controller can keep high gain on a wider range and better frequency selectivity and stability margin. Finally, an experimental prototype was made through the proposed control strategy. Through field test, the feasibility of the strategy was verified and power quality was then improved, so that the experimental results had achieved the desired effect.