Study on the Control Strategy of Photovoltaic Inverter in Unbalanced Grid

GAO Zhengzhong; WANG Lizhi; ZHAO Liancheng; LIU Longji; ZHANG Daosheng; WANG Deyang; SONG Wei

doi:10.14044/j.1674-1757.pcrpc.2016.01.015

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Study on the Control Strategy of Photovoltaic Inverter in Unbalanced Grid

更新时间：2024-09-14

- Study on the Control Strategy of Photovoltaic Inverter in Unbalanced Grid
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 37, Issue 1, Pages: 71-75(2016)
- 作者机构：
  
  1. 山东科技大学
  2. 山东能源枣矿集团供电工程处
  3. 青岛港湾职业技术学院
  4. 国网山东省蓬莱市供电公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2016.01.015
  CLC： TM464;TM615
- Published：2016，
- 稿件说明：
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[1]高正中,王立志,赵连成,刘隆吉,张道升,汪德洋,宋伟.电网不平衡条件下光伏逆变器控制策略研究[J].电力电容器与无功补偿,2016,37(01):71-75+85.

GAO ZHENGZHONG, WANG LIZHI, ZHAO LIANCHENG, et al. Study on the Control Strategy of Photovoltaic Inverter in Unbalanced Grid. [J]. Power capacitor & reactive power compensation, 2016, 37(1): 71-75.
[1]高正中,王立志,赵连成,刘隆吉,张道升,汪德洋,宋伟.电网不平衡条件下光伏逆变器控制策略研究[J].电力电容器与无功补偿,2016,37(01):71-75+85. DOI： 10.14044/j.1674-1757.pcrpc.2016.01.015.

GAO ZHENGZHONG, WANG LIZHI, ZHAO LIANCHENG, et al. Study on the Control Strategy of Photovoltaic Inverter in Unbalanced Grid. [J]. Power capacitor & reactive power compensation, 2016, 37(1): 71-75. DOI： 10.14044/j.1674-1757.pcrpc.2016.01.015.

摘要

某些条件下电网会发生不平衡故障

三相并网逆变器将受到影响

使得输出并网电流谐波含量大

对电网造成污染

严重时会导致并网逆变器无法正常工作

甚至损坏元器件。因此对三相并网逆变器在电网发生不平衡故障时控制策略的研究十分必要。本文论述了基于抑制逆变器交流侧负序电流的控制策略和基于抑制逆变器直流侧电压二次谐波的控制策略

并分别对2种控制策略的控制结果进行理论分析比较

同时利用PSCAD仿真软件

对2种控制策略进行了仿真分析。

Abstract

The fault of unbalance in the power grid is sometimes happened under certain conditions

and the three-phase grid connected inverter will be affected

leading to high harmonic contents of the output grid current and pollution to the grid and

in case of serious cases

the grid inverter cannot operate properly and even damaged components. Therefore

it is necessary to study the control strategy of the three-phase grid inverter at the unbalance fault of grid. In this paper

the control strategy based on suppressing the negative sequence current on the AC side of inverter and the control strategy based on the secondary harmonics of voltage on the DC side of the inverter are described. The control results of two control strategies are analyzed and compared theoretically

meanwhile

the two control strategies are simulated and analyzed by PSCAD simulation software.

关键词

光伏发电并网逆变器三相不平衡

Keywords

photovoltaic power generationgrid inverterthree-phase unbalance

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