LCL滤波并网逆变器逆变侧电流多次采样的单闭环控制策略

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LCL滤波并网逆变器逆变侧电流多次采样的单闭环控制策略

更新时间：2025-08-13

- LCL滤波并网逆变器逆变侧电流多次采样的单闭环控制策略
- Automation of Electric Power Systems Vol. 40, Issue 11, Pages: 87-92(2016)
- 作者机构：
  
  合肥工业大学电气与自动化工程学院,安徽省,合肥市,230009
- 作者简介：
- 基金信息：
- DOI：
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- Published：2016
- 稿件说明：
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ZHANG Xing. [J]. Automation of electric power systems, 2016, 40(11): 87-92.
DOI：

ZHANG Xing. [J]. Automation of electric power systems, 2016, 40(11): 87-92. DOI：

摘要

针对LCL滤波并网逆变器

研究了基于多次采样的电流单闭环控制方案。在不改变开关频率的条件下

一个开关周期内进行多次采样并更新调制信号

有效减小数字控制延时

提高了系统控制带宽和稳定裕度。定量分析了多次采样数字控制延时特性

并分析了多次采样条件下LCL滤波并网逆变器的控制性能。与常规有源阻尼多环结构相比

该方案采用电流单环控制即可实现系统稳定

无需增加传感器

从而简化了控制结构。最后通过实验验证了该方案的有效性。

Abstract

In connection with the grid-connected inverter with an LCL filter

a multi-sampling-based single closed-loop current control strategy is researched. In a switching period

data is sampled many times and the modulation signal is updated at the same time. As a result

the delay caused by digital control is greatly reduced without changing switching frequency

achieving high control bandwidth and large stability margin. The control delay based on multi-sampling is quantitatively analyzed

and the control performance of the grid-connected inverter with an LCL filter by multi-sampling is analyzed. Compared with the regular active damping method with multiple loops

the scheme adopting single current loop is seen to realize system stability without increasing sensors. Finally

experimental results show that the control scheme is effective. This work is supported by National Natural Science Foundation of China (No. 51277051).

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