Study on Resonance Feature Analysis and Suppression Strategy of Multi-parallel LCL APF System

CHEN Jikai; GUO Hongjian; CHENG Yiping; WANG Peng; GENG Yufeng; LI Guisen

doi:10.14044/j.1674-1757.pcrpc.2019.04.007

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Study on Resonance Feature Analysis and Suppression Strategy of Multi-parallel LCL APF System

更新时间：2024-09-14

- Study on Resonance Feature Analysis and Suppression Strategy of Multi-parallel LCL APF System
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 40, Issue 4, Pages: 34-39(2019)
- 作者机构：
  
  1. 东北电力大学电气工程学院
  2. 国家新源控股有限公司丰满发电厂
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2019.04.007
  CLC： TM761
- Published：2019，
- 稿件说明：
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[1]陈继开,郭鸿健,成毅平,王鹏,耿宇锋,李贵森.多机并联LCL型APF谐振特性分析及抑制策略研究[J].电力电容器与无功补偿,2019,40(04):34-39+44.

CHEN JIKAI, GUO HONGJIAN, CHENG YIPING, et al. Study on Resonance Feature Analysis and Suppression Strategy of Multi-parallel LCL APF System. [J]. Power capacitor & reactive power compensation, 2019, 40(4): 34-39.
[1]陈继开,郭鸿健,成毅平,王鹏,耿宇锋,李贵森.多机并联LCL型APF谐振特性分析及抑制策略研究[J].电力电容器与无功补偿,2019,40(04):34-39+44. DOI： 10.14044/j.1674-1757.pcrpc.2019.04.007.

CHEN JIKAI, GUO HONGJIAN, CHENG YIPING, et al. Study on Resonance Feature Analysis and Suppression Strategy of Multi-parallel LCL APF System. [J]. Power capacitor & reactive power compensation, 2019, 40(4): 34-39. DOI： 10.14044/j.1674-1757.pcrpc.2019.04.007.

摘要

由于LCL型有源电力滤波器（APF）作为一个三阶系统

不仅能够保证滤除高频开关分量

同时在相同的容量下

可大大降低电感取值

因此在配电网被大量采用。然而

随着LCL型APF大量并网

其自身产生的谐振问题开始凸显。本文针对配电网内并联LCL型APF与电网之间交互影响问题

建立了并联LCL型APF系统等效电路模型

并对多机并联LCL型APF系统进行了并联谐振特性分析

得出了并联谐振的表达式;提出一种基于电容支路电流反馈的有源阻尼策略来替代无源阻尼

对APF并联系统机网谐振进行抑制

进而分析了不同有源阻尼参数对并联谐振抑制效果的影响。最后通过RT-LAB仿真验证了上述理论分析的正确性与抑制策略有效性。

Abstract

LCL active power filter（APF）

as a three order system

is adopted widely in the distribution grid because

it can not only ensure to eliminate high frequency switching components

but also

reduce greatly the value of inductance at the same capacity. However

with the large number of LCL APF parallel access to the distribution network

the problem of its resonance will not be ignored. In view of the interaction problem between the parallel LCL APF and thepower grid in this paper

the equivalent circuit model of the parallel LCL APF system is set up and parallel resonance characteristics analysis of the parallel LCL APF system is performed so to obtain the expression of the parallel resonance. A kind of capacitive damping current feedback active damping strategy instead of the passive damping is proposed to suppress grid resonance in APF parallel system.The effects of different active damping parameters on the suppression of parallel resonance is analyzed further.Finally

the correctness of above theoretical analysis and the effectiveness of the control strategy are verified by the RT-LAB simulation.

关键词

多机并联APF系统并联谐振有源阻尼谐波补偿

Keywords

multi-parallel APF systemparallel resonanceactive damping strategyharmonic compensation

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