Improved Control of Grid-connected Converter with LCL Filter Based on Phase Compensation and Virtual Impedance Optimization

Yinghan GAO; Fen TANG; Jingdou LIU; Qi XIAO; Xuezhi WU; Xiangjun LI

doi:10.7500/AEPS20190330002

您当前的位置：

首页 >

文章列表页 >

Improved Control of Grid-connected Converter with LCL Filter Based on Phase Compensation and Virtual Impedance Optimization

Application Research | 更新时间：2025-06-16

- Improved Control of Grid-connected Converter with LCL Filter Based on Phase Compensation and Virtual Impedance Optimization
- Automation of Electric Power Systems Vol. 44, Issue 3, Pages: 167-175(2020)
- 作者机构：
  
  1. 北京交通大学国家能源主动配电网技术研发中心，北京市 100044
  2. 北京电动车辆协同创新中心，北京市 100044
  3. 新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司)，北京市 100192
- 作者简介：
- 基金信息：
  
  National Key R&D Program of China
- DOI：10.7500/AEPS20190330002
  CLC：
- Received：30 March 2019，
  
  Revised：2019-07-17，
  
  Published Online：13 November 2019，
  
  Published：25 March 2020
- 稿件说明：
移动端阅览
高英瀚,唐芬,刘京斗等.基于相位补偿和虚拟阻抗优化的LCL型并网变流器改进控制[J].电力系统自动化,2020,44(03):167-175.

GAO Yinghan,TANG Fen,LIU Jingdou,et al.Improved Control of Grid-connected Converter with LCL Filter Based on Phase Compensation and Virtual Impedance Optimization[J].Automation of Electric Power Systems,2020,44(03):167-175.
高英瀚,唐芬,刘京斗等.基于相位补偿和虚拟阻抗优化的LCL型并网变流器改进控制[J].电力系统自动化,2020,44(03):167-175. DOI： 10.7500/AEPS20190330002.

GAO Yinghan,TANG Fen,LIU Jingdou,et al.Improved Control of Grid-connected Converter with LCL Filter Based on Phase Compensation and Virtual Impedance Optimization[J].Automation of Electric Power Systems,2020,44(03):167-175. DOI： 10.7500/AEPS20190330002.

摘要

LCL型并网变流器常采用同步旋转坐标系下基于变流器侧电感电流的并网控制，但LCL型滤波器和数字延迟的

轴模型均存在轴间耦合，制约了并网性能，且随着开关频率降低，性能恶化更为明显。针对该问题，文中在建立LCL型并网变流器复矢量模型的基础上，对并网变流器耦合特性和传统解耦方案进行分析。针对现有方案的不足，提出了一种基于相位补偿和虚拟阻抗优化的LCL型并网变流器改进控制策略，通过零极点图详细分析了虚拟阻抗对系统耦合程度及系统阻尼特性的影响，进而给出了确定3个参数优化值的方法。最后，仿真和实验结果表明，与现有方案相比，所提策略能够实现对系统耦合程度及阻尼特性的独立控制，有效实现解耦并改善系统动态性能。

Abstract

The grid-connected control based on inductor current on the side of converter in synchronous rotating coordinate system is widely applied in the grid-connected converter with LCL-filter. However

the axe-cross-coupling exist in the

models of LCL filter and digital delay

which constrains the grid-connected performance and becomes worse as the switching frequency decreases. To address this issue

based on the complex vector modeling of grid-connected converter with LCL-filter

this paper analyzes the coupling characteristics of the grid-connected converter and the conventional decoupling scheme. Aiming at the shortcomings of the existing control strategies

this paper proposes an improved control strategy of the grid-connected converter with LCL-filter based on phase compensation and virtual impedance optimization. Then

the effect of virtual impedance on system coupling and system damping characteristics is analyzed in detail through the zero-pole plots. And the method for determining optimization values of three parameters are given. Finally

the simulation and experimental results show that the proposed strategy can achieve independent control of system coupling degree and damping characteristics

while effectively realize decoupling and improve system dynamic performance.

关键词

Keywords

references

刘芳 , 张兴 , 石荣亮 , 等 . 大功率微网逆变器输出阻抗解耦控制策略 [J]. 电力系统自动化 , 2015 , 39 ( 15 ): 117 - 125 .

LIU Fang , ZHANG Xing , SHI Rongliang , et al . An output impedance decoupled control strategy for high power microgrid inverter [J]. Automation of Electric Power Systems , 2015 , 39 ( 15 ): 117 - 125 .

张学广 , 付志超 , 陈文佳 , 等 . 弱电网下考虑锁相环影响的并网逆变器改进控制方法 [J]. 电力系统自动化 , 2018 , 42 ( 7 ): 139 - 145 . DOI: 10.7500/AEPS20170623002 http://dx.doi.org/10.7500/AEPS20170623002 .

ZHANG Xueguang , FU Zhichao , CHEN Wenjia , et al . An improved control method for grid-connected inverters considering impact of phase-locked loop under weak grid condition [J]. Automation of Electric Power Systems , 2018 , 42 ( 7 ): 139 - 145 . DOI: 10.7500/AEPS20170623002 http://dx.doi.org/10.7500/AEPS20170623002 .

贾利虎 , 朱永强 , 杜少飞 , 等 . 交直流微电网互联变流器控制策略 [J]. 电力系统自动化 , 2016 , 40 ( 24 ): 98 - 104 .

JIA Lihu , ZHU Yongqiang , DU Shaofei , et al . Control strategy of interlinked converter for AC/DC microgrid [J]. Automation of Electric Power Systems , 2016 , 40 ( 24 ): 98 - 104 .

邹小明 , 杜雄 , 王国宁 , 等 . 三相并网逆变器频率耦合机理分析及稳定性判定 [J]. 电力系统自动化 , 2018 , 42 ( 18 ): 57 - 70 . DOI: 10.7500/AEPS20170823005 http://dx.doi.org/10.7500/AEPS20170823005 .

ZOU Xiaoming , DU Xiong , WANG Guoning , et al . Frequency coupling mechanism analysis and stability judgement for three-phase grid-connected inverter [J]. Automation of Electric Power Systems , 2018 , 42 ( 18 ): 57 - 70 . DOI: 10.7500/AEPS 20170823005 http://dx.doi.org/10.7500/AEPS 20170823005 .

阚加荣 , 谢少军 , 吴云亚 , 等 . 逆变器侧电流反馈的LCL滤波并网逆变器参数设计 [J]. 电力系统自动化 , 2013 , 37 ( 17 ): 119 - 124 .

KAN Jiarong , XIE Shaojun , WU Yunya , et al . Parameter design for LCL filter grid-connected inverter using inverter-side current feedback strategy [J]. Automation of Electric Power Systems , 2013 , 37 ( 17 ): 119 - 124 .

尹靖元 , 金新民 , 吴学智 , 等 . 基于带通滤波器的LCL型滤波器有源阻尼控制 [J]. 电网技术 , 2013 , 37 ( 8 ): 2376 - 2382 .

YIN Jingyuan , JIN Xinmin , WU Xuezhi , et al . Active damping control strategy for LCL filter based on band pass filter [J]. Power System Technology , 2013 , 37 ( 8 ): 2376 - 2382 .

张兴 , 陈鹏 , 余畅舟 , 等 . LCL滤波并网逆变器逆变侧电流多次采样的单闭环控制策略 [J]. 电力系统自动化 , 2016 , 40 ( 11 ): 87 - 92 .

ZHANG Xing , CHEN Peng , YU Changzhou , et al . Single closed-loop control strategy based on multi-sampled inverter side currents for grid-connected inverters with LCL filters [J]. Automation of Electric Power Systems , 2016 , 40 ( 11 ): 87 - 92 .

赵强松 , 叶永强 , 徐国峰 . 分布式发电系统中并网逆变器的新型有源阻尼策略 [J]. 电力系统自动化 , 2015 , 39 ( 14 ): 140 - 144 .

ZHAO Qiangsong , YE Yongqiang , XU Guofeng . A novel active damping control scheme for grid-connected inverter in distributed power generation systems [J]. Automation of Electric Power Systems , 2015 , 39 ( 14 ): 140 - 144 .

许津铭 , 谢少军 , 黄如海 . LCL滤波并网逆变器的鲁棒电流控制 [J]. 电力系统自动化 , 2012 , 36 ( 19 ): 99 - 104 .

XU Jinming , XIE Shaojun , HUANG Ruhai . A robust current control strategy for grid-connected inverters with LCL filters [J]. Automation of Electric Power Systems , 2012 , 36 ( 19 ): 99 - 104 .

王堃 , 游小杰 , 王琛琛 , 等 . 低开关频率下SVPWM同步调制策略比较研究 [J]. 中国电机工程学报 , 2015 , 35 ( 16 ): 4175 - 4183 .

WANG Kun , YOU Xiaojie , WANG Chenchen , et al . Research on synchronized SVPWM strategies under low switching frequency [J]. Proceedings of the CSEE , 2015 , 35 ( 16 ): 4175 - 4183 .

吴为 , 丁信忠 , 严彩忠 . 基于复矢量的电流环解耦控制方法研究 [J]. 中国电机工程学报 , 2017 , 37 ( 14 ): 4184 - 4191 .

WU Wei , DING Xinzhong , YAN Caizhong . Research on control method of current loop decoupling based on complex vector [J]. Proceedings of the CSEE , 2017 , 37 ( 14 ): 4184 - 4191 .

WU Xinbao , ZUO Lin , YI Jianbo , et al . A double Closed-Loop control strategy for LCL-type grid-connected inverter based on combination state feedback [C]// International Conference on Smart Grid and Clean Energy Technologies (ICSGCE) , October 19 - 22 , 2016 , Chengdu, China: 359 - 363 .

ZENG L , YIMING T , TENG L , et al . Stability enhancement of single-loop inverter-side current feedback controlled grid-connected inverters with LCL filters [C]// IEEE Energy Conversion Congress & Exposition (ECCE) , October 1 - 5 , 2017 , Cincinnati, USA: 3030 - 3037 .

SHEN J , SCHRÖDER S , STAGGE H , et al . Precise modeling and analysis of DQ -frame current controller for high power converters with low pulse ratio [C]// IEEE Energy Conversion Congress & Exposition (ECCE) , September 15 - 20 , 2012 , Raleigh, USA: 61 - 68 .

屈克庆 , 李文旗 , 叶天凯 , 等 . 基于状态反馈的LCL型逆变器解耦控制策略 [J]. 电工技术学报 , 2016 , 31 ( 20 ): 130 - 138 .

QU Keqing , LI Wenqi , YE Tiankai , et al . State feedback based decoupling control strategy for grid-connected inverter with LCL filter [J]. Transactions of China Electrotechnical Society , 2016 , 31 ( 20 ): 130 - 138 .

邱长青 , 黄声华 , 林珍君 , 等 . 基于复矢量PI调节器的四象限级联型变频器PWM整流控制策略 [J]. 中国电机工程学报 , 2015 , 35 ( 11 ): 2804 - 2812 .

QIU Changqing , HUANG Shenghua , LIN Zhenjun , et al . A PWM rectifier control strategy for four-quadrant cascade converters based on complex vector PI regulators [J]. Proceedings of the CSEE , 2015 , 35 ( 11 ): 2804 - 2812 .

盘宏斌 , 欧思程 , 魏天阳 , 等 . 基于占空比预测与零极点结合的LCL型逆变器延时补偿方法 [J]. 电力系统自动化 , 2017 , 41 ( 18 ): 89 - 94 .

PAN Hongbin , OU Sicheng , WEI Tianyang , et al . Delay compensation method of LCL-typed inverter based on combination of duty cycle prediction with zero-pole [J]. Automation of Electric Power Systems , 2017 , 41 ( 18 ): 89 - 94 .

ZHOU Sizhan , LIU Jinjun , ZHOU Linyuan , et al . DQ current control of voltage source converters with a decoupling method based on preprocessed reference current feed-forward [J]. IEEE Transactions on Power Electronics , 2017 , 32 ( 11 ): 8904 - 8921 .

YEPES A G , VIDAL A , MALVAR J , et al . Tuning method aimed at optimized settling time and overshoot for synchronous proportional-integral current control in electric machines [J]. IEEE Transactions on Power Electronics , 2014 , 29 ( 6 ): 3041 - 3054 .

肖琦 , 唐芬 , 辛振 , 等 . 低开关频率下LCL型并网变流器复矢量分析及改进解耦控制 [J]. 电网技术 , 2018 , 42 ( 9 ): 2821 - 2829 .

XIAO Qi , TANG Fen , XIN Zhen , et al . Complex vector analysis and improved decoupling control for LCL-filtered grid-connected converters with low switching frequency [J]. Power System Technology , 2018 , 42 ( 9 ): 2821 - 2829 .

陈文佳 . 三相并网变换器复矢量阻抗分析及稳定控制方法 [D]. 哈尔滨 : 哈尔滨工业大学 , 2018 .

CHEN Wenjia . Complex vector impedance analysis and stability control method for three-phase grid-tied converter [D]. Harbin : Harbin Institute of Technology , 2018 .

HARNEFORS L . Modeling of three-phase dynamic systems using complex transfer functions and transfer matrices [J]. IEEE Transactions on Industrial Electronics , 2007 , 54 ( 4 ): 2239 - 2248 .

HOLMES D G , LIPO T A , MCGRATH B P , et al . Optimized design of stationary frame three phase AC current regulators [J]. IEEE Transactions on Power Electronics , 2009 , 24 ( 11 ): 2417 - 2426 .

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Dynamic Economic Dispatch Considering Adaptive Look-ahead Time Scale

Complex Torque Coefficient Based Analysis and Suppression Strategy of Low-frequency Oscillation in Grid-forming Converter Without Inner-loop

Transient Stability Analysis and Control of Grid-forming Converter Considering Virtual Impedance Power Decoupling

Current-based Control Strategy for Grid-connected Converter with Energy Storage and Embedded Synchronous Generator Support Characteristics

Related Author

GUO Junshao

WANG Mingqiang

HAN Xueshan

YANG Ming

DING Zhaohao

CHEN Xuetao

WU Chao

WANG Jian

Related Institution

State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University)

Jiaozuo Power Supply Company of State Grid Henan Electric Power Co., Ltd.

Key Laboratory of Power System Intelligent Dispatch and Control, Ministry of Education (Shandong University)

Guangxi Electric Power Design Institute Co., Ltd., China Energy Engineering Group

School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University

⁰