Novel Control Algorithm of Tracking Harmonic Current with Little Static Misadjustment for Active Power Filter with Three-Level NPC Inverter

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Novel Control Algorithm of Tracking Harmonic Current with Little Static Misadjustment for Active Power Filter with Three-Level NPC Inverter

更新时间：2025-07-09

- Novel Control Algorithm of Tracking Harmonic Current with Little Static Misadjustment for Active Power Filter with Three-Level NPC Inverter
- Vol. 43, Issue 8, Pages: 90-94(2009)
- 作者机构：
  
  西安交通大学电气工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM761
- Online First：10 August 2009，
  
  Published：2009
- 稿件说明：
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Novel Control Algorithm of Tracking Harmonic Current with Little Static Misadjustment for Active Power Filter with Three-Level NPC Inverter[J]. 2009, 43(8): 90-94.
DOI：

Novel Control Algorithm of Tracking Harmonic Current with Little Static Misadjustment for Active Power Filter with Three-Level NPC Inverter[J]. 2009, 43(8): 90-94. DOI：

摘要

为了提高三电平有源电力滤波器(APF)的谐波抑制能力

对其闭环控制系统进行研究发现

跟踪参考谐波电流的控制方法是决定三电平APF补偿质量的关键.分析了传统电流状态反馈解耦PI调节器的局限性

提出一种新型PI控制方法.在该方法中

采用状态观测器

对APF下一拍输出电流进行估计

弥补了数字控制系统一个载波周期的延时.采用重复预测型观测器

对指令谐波电流进行预测

具有动态响应快、且稳定后无静差的特性

因而改善了整个系统的控制效果.基于该控制方法进行了实验研究

从实验结果可以看出

加入该PI控制器后

系统电流的正弦性大大提高

突加负载和突减负载时

滤波系统能瞬时跟踪负载变化

有很好的动态响应速度.

Abstract

To improve the overall performance of the three-level active power filter(APF)

the closed-loop control system of this APF is investigated

and it is found that tracking command harmonic current is one of the keys to designing this APF. The current state feedback decoupling PI control is analyzed in detail and the limitation of the conventional PI conditioner in the traditional strategies

a novel PI control method is proposed

where the predictive output current value is obtained by the state predictor

and the delay of one sampling period is remedied in this digital control system by the state predictor. The predictive command harmonic current value is obtained by the repetitive predictor synchronously with higher dynamic convergence rate and little static misadjustment. The experiment results demonstrate the steady filtering capability.

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references

王兆安,杨君,刘进军. 谐波抑制和无功功率补偿[M]. 北京:机械工业出版社,1998.

王群,姚为正,王兆安. 低通滤波器对谐波检测电路的影响[J]. 西安交通大学学报,2002,33(4):5-8.

WANG Qun, YAO Weizheng, WANG Zhao'an. Effect of low pass filter on harmonics detection circuit[J].Journal of Xi'an Jiaotong University,1999,30(4):5-8.

AKIRA N, TAKAHASHI I, AKAGI H. A new neutral-point-clamped PWM inverter [J]. IEEE Trans on Industry Applications, 1981, 17(3): 518-523.

ABURTO V, SCHNEDER M, MORAN L, et al. An active power filter implemented with a three-level NPC voltage-source inverter[C]∥Proceedings of the 1997 IEEE PESC. Piscataway, NJ, USA: IEEE, 1997: 1121-1126.

詹长江.用户电力统一调节器的研究[D].北京:清华大学电气工程学院,1999.

何英杰,邹云屏,林磊,等. 三电平有源滤波器直流侧电压控制方法[J]. 高电压技术,2006,32(6): 79-83.

HE Yingjie, ZOU Yunping, LIN Lei, et al. Research on the control algorithm of DC voltage for an active filter with three-level NPC inverter[J]. High Voltage Engineering, 2006, 32(6): 79-83.

张凯.基于重复控制原理的CVCF-PWM逆变器波形控制技术研究[D]. 武汉:华中理工大学电气工程学院, 2000.

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