Harmonic Mixed Damping Control Strategy for LLCL Grid-Connected Inverter in Weak Power Grid

LI Shengqing; TANG Xinyun; ZHU Hui; PENG Xiaowei; HUANG Xinyan

doi:10.3969/j.issn.1008-0198.2022.06.009

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Harmonic Mixed Damping Control Strategy for LLCL Grid-Connected Inverter in Weak Power Grid

更新时间：2025-06-11

- Harmonic Mixed Damping Control Strategy for LLCL Grid-Connected Inverter in Weak Power Grid
- Vol. 42, Issue 6, Pages: 54-58(2022)
- 作者机构：
  
  1. 湖南工业大学电气与信息工程学院,湖南,株洲,412007
  2. 湖南红太阳光电科技有限公司,湖南,长沙,410221
  3. 湖南科瑞变流股份有限公司,湖南,株洲,412007
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.1008-0198.2022.06.009
  CLC： TM464
- Published：2022
- 稿件说明：
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李圣清, 唐昕昀, 朱辉, 彭晓玮, 黄心沿. 弱电网中LLCL型并网逆变器的谐波混合阻尼控制策略[J]. 湖南电力, 2022, 42(6): 54-58.

LI Shengqing, TANG Xinyun, ZHU Hui, et al. Harmonic Mixed Damping Control Strategy for LLCL Grid-Connected Inverter in Weak Power Grid[J]. 2022, 42(6): 54-58.
李圣清, 唐昕昀, 朱辉, 彭晓玮, 黄心沿. 弱电网中LLCL型并网逆变器的谐波混合阻尼控制策略[J]. 湖南电力, 2022, 42(6): 54-58. DOI： 10.3969/j.issn.1008-0198.2022.06.009.

LI Shengqing, TANG Xinyun, ZHU Hui, et al. Harmonic Mixed Damping Control Strategy for LLCL Grid-Connected Inverter in Weak Power Grid[J]. 2022, 42(6): 54-58. DOI： 10.3969/j.issn.1008-0198.2022.06.009.

摘要

为了能在弱电网中更好地抑制开关频率和系统谐振峰处谐波

提出一种弱电网中LLCL型并网逆变器的谐波混合阻尼控制策略。首先对比分析了LLCL型与LCL型滤波器的幅频特性

然后在有源阻尼法基础上添加无源阻尼法

通过对有源阻尼中k值和无源阻尼中R值的设定

在不过多增加损耗的情况下

减少有源阻尼法受控制延迟的影响

将两种方法的优势相结合。最后仿真实验表明

该控制策略对谐波具有较好的抑制效果

比有源阻尼法电网谐波总畸变率下降了1.18%

并且在不同弱电网情况下

具有良好的稳定性和适应能力。

Abstract

In order to suppress the harmonics of switching frequency and system resonant peak in weak power grid

a harmonic mixed damping control strategy for LLCL grid-connected inverter in weak power grid is proposed.First the LLCL type and LCL type amplitude frequency characteristics of the filter are analyzed

and then based on the active damping method to add the passive damping method

through the active damping of k value and R value set in the passive damping

under the condition of no more loss

the effect of active damping method by control delay is reduced

combining the advantages of two methods.Finally

the simulation results show that the proposed control strategy has good harmonic suppression effect

and the total harmonic distortion rate is reduced by 1.18% compared with the active damping method

and it has good stability and adaptability under different weak power networks.

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references

边志维,何远彬,吴圆圆,等.一种提高LCL型并网逆变器无源性及抗扰性的网侧电流控制策略[J].中国电机工程学报: 2022,42(6):2175-2186.

李圣清,姚鑫,冯浩田,等.基于复合预测的LCL型光伏逆变器无差拍控制[J].湖南电力,2022,42(4):40-45.

胡祺,付立军,马凡,等.弱电网下基于锁相控制并网变换器小扰动同步稳定分析[J].中国电机工程学报,2021,41(1):98-108.

吴丽珍,刘腾飞,陈伟,等.弱电网中LLCL型并网逆变器的谐振分析与抑制策略研究[J].太阳能学报,2021,42(3):276-282.

华铤,林桦,肖建杰,等.L型并网逆变器不同分析方法的比较研究[J].电力电子技术,2020,54(3):20-23.

孔令霞,王维庆,王海云.光伏并网逆变器LCL滤波器参数设计方法[J].计算机仿真,2021,38(8):75-80.

刘丛伟,林跻云.三相PWM整流器模型预测控制的研究[J].电气工程学报,2017,12(3):16-23.

彭崇文,曹太强,郭筱瑛,等.单相LLCL并网逆变器的研究[J].电气传动,2018,48 (12):35-38.

许德志,汪飞,阮毅.LCL、LLCL和LLCCL滤波器无源阻尼分析[J].中国电机工程学报,2015,35(18):4725-4735.

杨凯,王继忠,刘德君.LLCL滤波器无源阻尼对比分析[J].华北大学学报(自然科学版),2020,21(1):134-140.

Han Y, Li Z, Yang P, et al. Analysis and design ofimproved weighted average current control strategy for LCL-type grid-connected inverters[J]. IEEE Transactions on Energy Conversion, 2017, 32(3): 941-952.

Zhu Jiaxiong, Xiao Zhigang, Feng Chang. Simulation of LLCL filter based on active damping weighted current control strategy[J]. MATEC Web of Conferences, 2021, 336(01011):1-6.

刘海涛,唐龙.基于LLCL型滤波器的三相并网逆变器控制策略仿真分析[J].大功率变流技术,2015(3):15-18.

吴丽珍,安利锋,陈伟,等.考虑电网阻抗变化的LLCL并网逆变器谐振抑制策略[J].兰州理工大学学报,2021,47(4):76-82.

李强. 弱电网下基于混合阻尼的LCL并网逆变器控制研究[D].兰州:兰州交通大学,2021.

黄亮,杨雪梅,张锐明,等.基于LLCL滤波器混合阻尼策略设计方法[J].电力系统保护与控制,2020,48(9):150-156.

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