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浙江大学学报(工学版)
电气工程     
LCL型并网逆变器自适应谐振抑制
张奔奔,胥芳,吴乐彬,艾青林
浙江工业大学 机械工程学院,浙江 杭州 310014
Adaptive resonance damping of LCL filtered grid connected inverter
ZHANG Ben ben,XU Fang,WU Le bin,AI Qing ling
College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310014,China
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摘要:

针对弱电网时在电流控制器前向通路串联陷波器的电感 电容 电感(LCL)型并网逆变器谐振抑制方法可能失效的问题,提出采用自适应陷波器的新方法.通过对基于陷波器的有源阻尼方法机理研究,得到该方法的实质是实现传递函数的零极点对消,提出采用在线检测系统谐振频率的方法实时修正陷波器的陷波频率.为了简化数字运算,将陷波器改进为可独立配置零极点的双二阶滤波器,根据所测系统的谐振频率修正PI控制器的比例系数,以保证系统的带宽及稳定性.实验证明,采用所提方案可以有效地提高LCL滤波并网逆变器的弱网适应性.

Abstract:

When grid is weak,inductance capacitor inductance (LCL) filtered inverter's resonance damped method by cascading notch filter in forward channel of current controller may be failed. A method was proposed to correct the notch frequency of notch filter by detecting the system resonance frequency on line in order to solve the problem.  Then a biquad filter was proposed instead of notch filter as the correct object. Then notch frequency and the proportion factor of PI controller were corrected. Experiments validate that the proposed method can efficiently improve the weak grid adaption of LCL filtered inverters.

出版日期: 2016-03-31
:  TM 464  
基金资助:

国家“863”高技术研究发展计划资助项目(2013AA050405);高等学校博士学科点专项科研基金资助项目(20123317110004);省科技厅创新团队基金资助项目(2011R50011 12);国家自然科学基金资助项目(51275470);浙江省自然科学基金资助项目(LY12E07004).

通讯作者: 胥芳,女,教授,博导. ORCID:0000 0002 9739 6851.     E-mail: fangx@zjut.edu.cn
作者简介: 张奔奔(1988-),男,博士生,从事光伏发电及并网技术的研究.ORCID:0000 0002 6742 8971.E-mail:ben0107@qq.com
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引用本文:

张奔奔,胥芳,吴乐彬,艾青林. LCL型并网逆变器自适应谐振抑制[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.01.026.

ZHANG Ben ben,XU Fang,WU Le bin,AI Qing ling. Adaptive resonance damping of LCL filtered grid connected inverter. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.01.026.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.01.026        http://www.zjujournals.com/eng/CN/Y2016/V50/I1/180

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