Study on PV Grid-connected Inverter Control Based on Virtual Resistance Harmonic Suppression

OUYANG Sen; KE Qingpai; MA Wenjie; ZHANG Huaying

doi:10.14044/j.1674-1757.pcrpc.2018.04.031

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Study on PV Grid-connected Inverter Control Based on Virtual Resistance Harmonic Suppression

更新时间：2024-09-14

- Study on PV Grid-connected Inverter Control Based on Virtual Resistance Harmonic Suppression
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 39, Issue 4, Pages: 184-189(2018)
- 作者机构：
  
  1. 华南理工大学电力学院
  2. 深圳供电局有限公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2018.04.031
  CLC： TM464
- Published：2018，
- 稿件说明：
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[1]欧阳森,柯清派,马文杰,张华赢.基于虚拟电阻谐波抑制的光伏逆变器控制研究[J].电力电容器与无功补偿,2018,39(04):184-189.

OUYANG SEN, KE QINGPAI, MA WENJIE, et al. Study on PV Grid-connected Inverter Control Based on Virtual Resistance Harmonic Suppression. [J]. Power capacitor & reactive power compensation, 2018, 39(4): 184-189.
[1]欧阳森,柯清派,马文杰,张华赢.基于虚拟电阻谐波抑制的光伏逆变器控制研究[J].电力电容器与无功补偿,2018,39(04):184-189. DOI： 10.14044/j.1674-1757.pcrpc.2018.04.031.

OUYANG SEN, KE QINGPAI, MA WENJIE, et al. Study on PV Grid-connected Inverter Control Based on Virtual Resistance Harmonic Suppression. [J]. Power capacitor & reactive power compensation, 2018, 39(4): 184-189. DOI： 10.14044/j.1674-1757.pcrpc.2018.04.031.

摘要

随着大量主动型负荷接入低压配电网

其带来的电能质量问题愈发严重而引起了广泛关注。针对低压配电网大量分布式电源接入带来的严重的谐波问题

本文提出一种基于虚拟电阻谐波抑制的光伏逆变器控制策略

使得光伏逆变器在除发电功能外还具备主动抑制谐波的功能。首先

提出基于虚拟电阻的谐波提取方法

通过检测并网点电压谐波值除以虚拟电阻值得到谐波电流补偿信号用于电流内环控制;然后根据诺顿等效定理分析最佳阻值的存在并分析了搜索方法

通过调整虚拟电阻值使得吸收谐波功率最大、电压总畸变率最小;最后

仿真和实验验证了该方法的有效性。

Abstract

With a large number of active loads connected to the low voltage distribution network（LVDN）

the problem of power quality has become more and more serious and attracted wide concerns. As for the issue of the serious harmonics due to connection of a large number of distribution power supply in the low voltage distribution grid

in this paper a kind of PV inverter control strategy based on virtual resistance harmonic suppression is proposed so to keep the PV inverter

in addition to power generation function possess the function of actively suppressing harmonics. Firstly

the harmonic extraction method based on virtual resistance is proposed. The harmonic current compensation signal is obtained by detecting the voltage harmonic value at the grid-connected point divided by the virtual resistance value for current inner loop control. Then

the existence of best resistance and the search method are analyzed by the Norton’s equivalent theorem so to keep the absorption harmonic power maximum and total distortion of voltage minimum by way of adjusting virtual resistance. Finally

the effectiveness of the method is simulated and experimentally verified.

关键词

并网逆变器谐波抑制虚拟电阻最大谐波功率点

Keywords

grid-connected inverterharmonic suppressionvirtual resistancemaximum harmonic power point

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