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| 摘要: |
| 有源电力滤波器APF(Active Power Filter)是解决电网谐波问题的有效手段,其补偿性能取决于谐波电流检测方法和电流控制方法。介绍了一种基于功率平衡原理的新型APF,分析了低速的周期离散技术的电压环和高速的电流环控制策略,得到了具有2个反馈环的系统数学模型。研究了电流检测部分的比例、积分环节对补偿特性的影响,比例系数增大可提高APF的补偿特性,而积分系数过大可能导致系统振荡。动态模拟实验验证了理论分析的结论。 |
| 关键词: 有源电力滤波器,数学模型,谐波,补偿特性 |
| DOI： |
| 分类号:TN713.8 |
| 基金项目: |
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| Research on compensative characteristics of active power filter |
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WU Fei XIE Da ZHANG Yan-chi
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| Abstract: |
| APF(Active Power Filter) is an effective means to eliminate current harmonics.Its com-pensative performance depends on harmonic current detection and control methods.A novel active power filter based on power balance is introduced,of which the low speed voltage-loop control strategy based on period disperse technique and the high speed current-loop control strategy are analyzed to establish the system mathematical model with two feedback loops.The influence of PI regulation in current detection part on compensative characteristics is studied.Increase of the proportional coefficient may improve compensative characteristics,while excessive increase of the integral coefficient may induce oscillation.Dynamic experiments prove results of theoretical analysis. |
| Key words: active power filter,mathematical model,harmonics,compensative characteristics |
