半月刊

ISSN 1000-1026

CN 32-1180/TP

+高级检索 English
多逆变器并网下的超高次谐振特性分析
作者:
作者单位:

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

通讯作者:

基金项目:

国家自然科学基金资助项目(51807126)。


Analysis on Supraharmonic Resonance Characteristics with Integration of Multiple Inverters
Author:
Affiliation:

College of Electrical Engineering, Sichuan University, Chengdu 610065, China

Fund Project:

This work is supported by National Natural Science Foundation of China (No. 51807126).

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    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.

    图1 单相LCL型并网逆变器拓扑Fig.1 Topology of single-phase LCL-type grid-connected inverter
    图2 h次谐波下逆变器并网等效电路模型Fig.2 Equivalent circuit model of grid-connected inverters with h-order harmonic
    图3 不同L1和L2下PCC处的电压频谱Fig.3 Voltage spectrum at PCC with different L1 and L2
    图4 不同并网逆变器数量下PCC处的电压波形及频谱Fig.4 Waveform and spectrum of voltage at PCC with different numbers of grid-connected inverter
    图5 不同Lg下PCC处的电压频谱Fig.5 Voltage spectrum at PCC with different Lg
    图6 不同类型滤波器下PCC处的电压频谱Fig.6 Voltage spectrum at PCC with different types of filters
    表 1 不同滤波器参数下谐振放大系数Kr的值Table 1 Value of resonance amplification factor Kr with different filter parameters
    参考文献
    相似文献
    引证文献
引用本文

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(1):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(1):192-199. DOI:10.7500/AEPS20190430019.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-04-30
  • 最后修改日期:2019-07-15
  • 录用日期:
  • 在线发布日期: 2020-01-04
  • 出版日期: