Coordinated Control and Delay Compensation Strategy for Grid Connected LCL Inverter

LIU Yunfei; ZHANG Jihong; XIE Bo; YU Hongyan; WU Zhenkui; LI Zhonghu

doi:10.13296/j.1001-1609.hva.2026.04.014

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Coordinated Control and Delay Compensation Strategy for Grid Connected LCL Inverter

Research & Analysis | 更新时间：2026-04-08

- Coordinated Control and Delay Compensation Strategy for Grid Connected LCL Inverter
- High Voltage Apparatus Vol. 62, Issue 4, Pages: 122-131(2026)
- 作者机构：
  
  内蒙古科技大学信息工程学院，内蒙古包头 014010
  中海油新能源二连浩特风电有限公司，内蒙古锡林郭勒盟二连浩特 012600，3.中核汇能有限公司，北京 010020
  中核汇能有限公司，北京 010020
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.04.014
  CLC：
- Received：05 July 2025，
  
  Revised：2025-10-09，
  
  Published：16 April 2026
- 稿件说明：
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LIU Yunfei, ZHANG Jihong, XIE Bo, et al. Coordinated Control and Delay Compensation Strategy for Grid Connected LCL Inverter[J]. High Voltage Apparatus, 2026, 62(4): 122-131.
DOI：

LIU Yunfei, ZHANG Jihong, XIE Bo, et al. Coordinated Control and Delay Compensation Strategy for Grid Connected LCL Inverter[J]. High Voltage Apparatus, 2026, 62(4): 122-131. DOI： 10.13296/j.1001-1609.hva.2026.04.014.

摘要

三相LCL储能元件是目前最常用的滤波设备。针对规模化分布式发电系统有源阻尼控制策略引起的逆变器输出电流波形时滞、失真、甚至影响电能质量等问题，文章建立了LCL型三相逆变器等值电路模型、分析了控制过程中时滞产生的主要因素和对系统特性的影响，设计了基于复合控制策略的延时补偿方案；引入延时补偿环节，利用超前环节计算延时，确定最优相位补偿点，同时引入低通滤波环节抑制补偿支路的谐波分量，从而拓展主动阻尼的有效作用区域，确保等效电阻始终为正的设计约束。应用预估时间控制方法补偿零阶保持器引起的延时，达到了控制预期目的。最后，采用仿真和实验手段验证所提控制策略的有效性。

Abstract

Three-phase LCL energy storage element is currently the most commonly used filtering equipment. In with of such issues as time lag and distortion of inverter output current waveform and even the influence of power quality due to the active damping control strategy of large-scale distributed power generation system

the equivalent circuit model of LCL-type three-phase inverter is set up in this paper

the main factors of time lag generated in the control process and the influence on the system characteristics are analyzed. The delay compensation scheme based on a composite control strategy is designed. A lead network is employed to calculate the time delay and determine the optimal phase compensation point.Meanwhile

a low-pass filter is incorporated to suppress the harmonic components of the compensation branch

thereby expanding the effective operating range of active damping and ensuring compliance with the design constraint that the equivalent resistance remains positive at all times. The prediction time control method is used to compensate for the delay caused by the zero-order retainer and achieve the desired purpose of control. Finally

the effectiveness of the proposed control strategy is verified by the simulations and experiments.

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references

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