Research on DFT Compound Current Control Strategy for SAPF

MA Yidan; ZHENG Lijun; GAO Yunguang; WU Xinghua; SONG Jiancheng; TIAN Muqin

doi:10.14044/j.1674-1757.pcrpc.2021.05.007

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Research on DFT Compound Current Control Strategy for SAPF

更新时间：2024-09-14

- Research on DFT Compound Current Control Strategy for SAPF
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 42, Issue 5, Pages: 41-47(2021)
- 作者机构：
  
  1. 太原理工大学煤矿电气设备与智能控制山西省重点实验室
  2. 太原科技大学电子信息工程学院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2021.05.007
  CLC： TM761
- Published：2021，
- 稿件说明：
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MA YIDAN, ZHENG LIJUN, GAO YUNGUANG, et al. Research on DFT Compound Current Control Strategy for SAPF. [J]. Power capacitor & reactive power compensation, 2021, 42(5): 41-47.
DOI：

MA YIDAN, ZHENG LIJUN, GAO YUNGUANG, et al. Research on DFT Compound Current Control Strategy for SAPF. [J]. Power capacitor & reactive power compensation, 2021, 42(5): 41-47. DOI： 10.14044/j.1674-1757.pcrpc.2021.05.007.

摘要

文章将三相并联型有源电力滤波器(SAPF)作为研究对象

先分析了PI与重复控制(RC)相结合的传统复合电流控制策略

该策略中的重复控制器在对周期性正弦信号实现高精度追踪的同时会放大高频谐波

对补偿效果产生影响。为此

提出了基于离散傅里叶变换(DFT)的改进重复控制器

改进结构不仅能针对特定谐波进行补偿

还具有更快的响应速度

与PI结合后的复合控制器则具有更为优异的稳态性能和动态特性。最后通过Matlab仿真结果验证了所提策略的有效性。

Abstract

The three-phase shunt active power filter（SAPF）is taken as the research objective in this paper and the traditional compound current control strategy combining PI and repetitive control（RC）is analyzed firstly. The repetitive controller in this strategy will amplify high-frequency harmonics while achieving high-precision tracking of periodic sinusoidal signals

which has effect on the compensation result.Therefore

an improved repetitive controller based on discrete Fourier transform（DFT）is proposed. The improvement of structure can not only compensate specific harmonics

but also have a faster response speed.Therefore

the compound controller cascaded with PI has superior steady-state performance and dynamic characteristics. Finally

the effectiveness of the proposed strategy is verified by Matlab simulation results.

关键词

并联型有源电力滤波器谐波补偿复合控制DFT选频滤波器

Keywords

shunt active power filterharmonic compensationcompound controlDFTfrequency selective filter

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