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多逆变器并网下的超高次谐振特性分析
Analysis on Supraharmonic Resonance Characteristics with Integration of Multiple Inverters
- 电力系统自动化 2020年44卷第1期 页码：192-199
- 作者机构：
四川大学电气工程学院，四川省成都市 610065
- 作者简介：
汪颖(1981—)，女，博士，副教授，硕士生导师，主要研究方向：电能质量与优质供电。E-mail：20312028@qq.com
罗代军(1994—)，男，硕士研究生，主要研究方向：电能质量与超高次谐波。E-mail：330869522@qq.com
肖先勇(1968—)，男，通信作者，博士，教授，博士生导师，主要研究方向：电能质量与优质供电。E-mail：xiaoxianyong @163.com
- 基金信息：国家自然科学基金资助项目(51807126)
DOI：10.7500/AEPS20190430019
中图分类号：收稿日期：2019-04-30，
修回日期：2019-07-15，
网络出版日期：2019-11-01，
纸质出版日期：2020-01-10
- 稿件说明：
移动端阅览
汪颖,罗代军,肖先勇等.多逆变器并网下的超高次谐振特性分析[J].电力系统自动化,2020,44(01):192-199.
WANG Ying,LUO Daijun,XIAO Xianyong,et al.Analysis on Supraharmonic Resonance Characteristics with Integration of Multiple Inverters[J].Automation of Electric Power Systems,2020,44(01):192-199.
汪颖,罗代军,肖先勇等.多逆变器并网下的超高次谐振特性分析[J].电力系统自动化,2020,44(01):192-199. DOI： 10.7500/AEPS20190430019.
WANG Ying,LUO Daijun,XIAO Xianyong,et al.Analysis on Supraharmonic Resonance Characteristics with Integration of Multiple Inverters[J].Automation of Electric Power Systems,2020,44(01):192-199. DOI： 10.7500/AEPS20190430019.
摘要
超高次谐波是电力电子技术快速发展过程中不可避免的电能质量问题，受到了越来越多的关注。为揭示多个逆变器并网下的超高次谐振特性，文中提出了一种多逆变器并网下的超高次谐振特性分析方法。首先，以单相并网逆变器为例，分析其在单极倍频正弦脉宽调制（SPWM）下的谐波分布特性，以此来揭示基于单极倍频SPWM控制下的电力电子装置的超高次谐波发射机理。然后，建立了逆变器并网等效电路模型，并在此基础上，得到了多逆变器并网系统超高次谐波下的等效电路模型。其次，根据所建的等效电路模型求得了公共连接点的等效阻抗，并提出了超高次谐振放大系数的概念，在此基础上采用控制变量法分析了滤波器参数、并网逆变器数量和电网阻抗变化下系统的超高次谐振特性。最后，通过仿真验证了所建模型和理论分析的正确性。
Abstract
Supraharmonic is an inevitable power quality problem in the rapid development of power electronic technologies
which attracts more and more attention. In order to reveal the supraharmonic resonance characteristics with integration of multiple inverters
this paper proposes an analysis method of supraharmonic resonance characteristic. Firstly
taking the single-phase grid-connected inverter as an example
the supraharmonic distribution characteristics with the control of unipolar and frequency multiplication sinusoidal pulse width modulation (SPWM) are analyzed to reveal the supraharmonic emission mechanism of power electronic devices based on unipolar and frequency multiplication SPWM control. Secondly
an equivalent circuit model of grid-connected inverter is established. On this basis
the supraharmonic equivalent circuit model of multi-inverter grid-connected system is obtained. Thirdly
according to the equivalent circuit model
the equivalent impedance at the point of common coupling (PCC) is given
and the concept of supraharmonic resonance amplification factor is proposed. Then the control variable method is used to analyze the supraharmonic resonance characteristics of the grid-connected system when the filter parameters
the number of grid-connected inverters and the grid impedance change. Finally
the correctness of the model and theoretical analysis is verified by simulation.
关键词
Keywords
references
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