Post Fault Recovery Control of Grid-connected Photovoltaic System Based on Feedforward Compensation of Grid Voltage Increment

Ke JIA; Jinfeng CHEN; Hechun WANG; Bin YANG; Guankun ZHAO; Tianshu BI

doi:10.7500/AEPS20190710006

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Post Fault Recovery Control of Grid-connected Photovoltaic System Based on Feedforward Compensation of Grid Voltage Increment

Basic Research | 更新时间：2025-06-16

- Post Fault Recovery Control of Grid-connected Photovoltaic System Based on Feedforward Compensation of Grid Voltage Increment
- Automation of Electric Power Systems Vol. 44, Issue 9, Pages: 78-85(2020)
- 作者机构：
  
  1.新能源电力系统国家重点实验室(华北电力大学)，北京市 102206
  2.国网江西省电力有限公司检修分公司，江西省南昌市 330029
- 作者简介：
- 基金信息：
  
  Abstract:
  Renewable energy sources are directly or indirectly connected to the grid through power electronic devices. Their fault currents have limited amplitudes, controlled angles, rich harmonics and strong
- DOI：10.7500/AEPS20190710006
  CLC：
- Received：10 July 2019，
  
  Revised：2019-11-18，
  
  Published Online：05 March 2020，
  
  Published：10 May 2020
- 稿件说明：
移动端阅览
贾科,陈金锋,王和春等.基于电网电压增量前馈补偿的光伏并网系统故障后恢复控制[J].电力系统自动化,2020,44(9):78-85.

JIA Ke,CHEN Jinfeng,WANG Hechun,et al.Post Fault Recovery Control of Grid-connected Photovoltaic System Based on Feedforward Compensation of Grid Voltage Increment[J].Automation of Electric Power Systems,2020,44(9):78-85.
贾科,陈金锋,王和春等.基于电网电压增量前馈补偿的光伏并网系统故障后恢复控制[J].电力系统自动化,2020,44(9):78-85. DOI： 10.7500/AEPS20190710006.

JIA Ke,CHEN Jinfeng,WANG Hechun,et al.Post Fault Recovery Control of Grid-connected Photovoltaic System Based on Feedforward Compensation of Grid Voltage Increment[J].Automation of Electric Power Systems,2020,44(9):78-85. DOI： 10.7500/AEPS20190710006.

摘要

光伏直流升压汇集系统经较大过渡电阻的故障清除后，存在直流变压器难以切换回原有控制策略的问题。针对此，在分析故障点过渡电阻和直流电压波动量之间关系的基础上，提出了一种基于电网电压增量前馈补偿的故障后恢复控制策略。在故障清除时，通过监测电网电压增量值，采用修正逆变器控制外环直流电压参考值的方式短时增大直流母线电压的波动量，从而使直流变压器实现控制策略的可靠切换。仿真结果表明，所提方法在交流电网经较大过渡电阻发生的故障被清除后，光伏侧控制策略能可靠且快速地进行切换，有效提高了光伏的利用率。

Abstract

After the fault with large transition resistance in grid-connected photovoltaic system by DC boosting circuit is cleared

the direct current transformer (DCT) is difficult to automatically switch back to its original control strategy. Based on the analysis of the relationship between transition resistance and the DC voltage fluctuation

a coordinated control strategy based on the feedforward compensation for voltage increment of power grid is proposed. By detecting the incremental value of power grid voltage

the fluctuation value of DC voltage increases by correcting the reference DC voltage of inverter outer control loop

which enables the reliable switch of DCT control strategy. The simulation results show that the control strategy on photovoltaic side can switch reliably and quickly after the fault with large transition resistance in AC grid is cleared

and the utilization of photovoltaic resources is improved effectively.

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Keywords

references

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