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基于LC滤波的光伏逆变器电感电流反馈控制策略研究

  • 戴志威 ,
  • 舒 杰 ,
  • 吴昌宏 ,
  • 王 浩 ,
  • 宋香荣 ,
  • 张 伟
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  • 1. 中国科学院广州能源研究所,广州 510640;
    2. 江苏省光伏科学与工程协同创新中心,江苏 常州 213164;                     
    3. 中国科学院大学,北京 100049
戴志威(1991-),男,硕士研究生,从事新能源发电中的电力电子与控制技术研究。

收稿日期: 2014-08-08

  修回日期: 2014-11-05

  网络出版日期: 2014-12-30

基金资助

国家自然科学基金(51206170);
广东省自然科学基金(S201204007277);
广州市重大科技专项(2010U1-D00231);
院市合作项目(2012HY1006551)

Study on Inductor Current Feedback Control Strategy of Photovoltaic Grid-connected Inverter Based on LC Filter

  • DAI Zhi-wei ,
  • SHU Jie ,
  • WU Chang-hong ,
  • WANG Hao ,
  • SONG Xiang-rong ,
  • ZHANG Wei
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  • 1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;                         
    2. Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Changzhou 213164, China;                   
    3. University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2014-08-08

  Revised date: 2014-11-05

  Online published: 2014-12-30

摘要

针对光伏并网逆变器的特点,基于电感电流反馈控制的光伏并网逆变器,提出了参考电流相位超前的电流内环控制策略。通过分析单相并网逆变器结构,推导了LC滤波器上电压电流矢量关系。加入电网电压瞬时值前馈解耦控制,研究了比例调节和准比例谐振调节两种策略下参考电流与输出电流的关联。基于一台3 kW逆变器为实验平台的理论分析和实验结果表明,采用该策略的逆变器并网电流时刻跟踪电网电压频率和相位,功率因数为1,并网电流谐波失真度低于3%。

本文引用格式

戴志威 , 舒 杰 , 吴昌宏 , 王 浩 , 宋香荣 , 张 伟 . 基于LC滤波的光伏逆变器电感电流反馈控制策略研究[J]. 新能源进展, 2014 , 2(6) : 449 -453 . DOI: 10.3969/j.issn.2095-560X.2014.06.007

Abstract

According to the features of grid-connected photovoltaic (PV) inverter, an advancing reference current loop control strategy based on the inverter with inductor current feedback was proposed. By analyzing the structure of single-phase grid connected inverter, the vector relationship between voltage and current on LC filter was presented. Proportional regulation and proportional-resonant regulation with the gird voltage feed-forward decoupling controlling was adopted to study the relevance between reference current and output current. Theoretical analysis and experimental results based on a 3 kW inverter experimental platform show that the output current of the inverter can track the frequency and the phase of the grid voltage well, the power factor is unity, and the total harmonic distortion of output current is below 3%.

参考文献

[1] Hassaine L, Olias E, Quintero J, et al. Overview of power inverter topologies and control structures for grid-connected photovoltaic system[J]. Renewable and Sustainable Energy Reviews, 2014, 30: 796-807.

[2] Ho C N M, Cheung V S P, Chung H S H. Constant-Frequency Hysteresis Current Control of Grid-Connected VSI Without Bandwidth Control[J]. IEEE Transactions on Power Electronics, 2009, 24(11): 2484-2495.

[3] 蔡磊, 钱照明, 彭方正. Z源单相并网逆变器控制的实现[J]. 电力电子技术, 2008, 42(7): 14-16.

[4] 李毅拓, 陆海峰, 瞿文龙, 等. 用于逆变器电流谐波抑制的改进的重复控制[J]. 清华大学学报, 2013, 53(7): 1030-1035.

[5] Almer S, Mariethoz S, Morari M. Sampled Data Model Predictive Control of a Voltage Source Inverter for Reduced Harmonic Distortion[J]. IEEE Transactions on Control Systems Technology, 2013, 21(5): 1907-1915.

[6] 黄伟煌, 付勋波, 林资旭. LC滤波电压源型逆变器闭环控制策略综合对比与设计[J]. 电力系统自动化, 2013, 37(19): 110-115.

[7] 马琳, 金新民, 唐芬, 等. 小功率单相并网逆变器并网电流的比例谐振控制[J]. 北京交通大学学报, 2010, 34(2): 128-132.

[8] Loh P C, Holmes D G. Analysis of multiloop control strategies for LC/CL/LCL-filtered voltage-source and current-source inverters[C]//38th Annual Meeting of the Industry-Applications-Society, Salt Lake City, UT, 12-16 Oct, 2003, 644-654.

[9] 俞杨威, 金天均, 谢文涛, 等. 基于PWM逆变器的LC滤波器[J]. 机电工程, 2007, 24(5): 50-52.

[10] 谢少军, 许津铭. LCL滤波并网逆变器的电流控制技术研究综述[J]. 电源学报, 2012, 42: 1-6.

[11] 胡文平, 周云飞. 基于准比例谐振控制器的高性能逆变器研究[J]. 武汉理工大学学报, 2010, 32(23): 85-88.

[12] 赵清林, 郭小强, 邬伟扬. 单相逆变器并网控制技术研究[J]. 中国电机工程学报, 2007, 27(16): 60-64.

[13] 黄如海, 谢少军. 基于比例谐振调节器的逆变器双环控制策略研究[J]. 电工技术学报, 2012, 27(2): 77-81.

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