单相光伏并网逆变器瞬时电流检测与补偿控制

ZHANG Qiang; LIU Jianzheng; LI Guojie

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单相光伏并网逆变器瞬时电流检测与补偿控制

更新时间：2025-08-13

- 单相光伏并网逆变器瞬时电流检测与补偿控制
- Automation of Electric Power Systems Vol. 31, Issue 10, Pages: 50-54(2007)
- 作者机构：
  
  清华大学电机系电力系统国家重点实验室,北京市,100084
- 作者简介：
- 基金信息：
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- Published：2007
- 稿件说明：
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ZHANG Qiang, LIU Jianzheng, LI Guojie. [J]. Automation of electric power systems, 2007, 31(10): 50-54.
DOI：

ZHANG Qiang, LIU Jianzheng, LI Guojie. [J]. Automation of electric power systems, 2007, 31(10): 50-54. DOI：

摘要

为拓展单相光伏并网无功补偿功能，实现单相并网系统无功和谐波电流的精确检测和补偿，提出一种改进的新型瞬时无功与谐波电流检测及补偿方法。该方法以瞬时无功理论为基础，推导出单相并网逆变器瞬时无功控制规律，可以简便、快速地分离所需电流分量;并结合无差拍理论，给出基于无差拍控制的单相并网逆变器的脉宽调制（PWM）算法，可以对瞬时谐波及无功电流进行补偿。将该控制策略应用于单相光伏并网系统，使光伏并网系统除提供有功功率外，同时兼备无功与谐波补偿功能，增强了光伏并网功能。

Abstract

In order to enhance the function of reactive power compensation of a single-phase photovoltaic system in grid connection and realize precise detection and compensation of reactive and harmonic current of the single-phase grid-connected inverter， an improved method of detecting instantaneous reactive and harmonic current in the single-phase grid-connected photovoltaic system is presented. Based on instantaneous reactive power theory， algorithms of current decoupling in the single-phase system are derived for performing the reactive power control of single-phase photovoltaic grid-connected inverter. The method proposed effectively solves the difficulties of the current detection in single-phase connection. The paper proposes to adopt a deadbeat control strategy and derives the algorithm of deadbeat PWM. With this system used in the photovoltaic grid-connected inverter， not only the system has the function of supplying active power， but also can effectively perform reactive power compensation and harmonic suppression.

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