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基于虚拟电阻的LCL型并网逆变器前馈控制策略

来源：电工电气发布时间：2023-08-28 14:28 浏览次数：172

基于虚拟电阻的LCL型并网逆变器前馈控制策略

焦龙¹，鲁西坤¹，刘万兵²，吕建光²

(1 安阳工学院电子信息与电气工程学院，河南安阳 455000；

2 河南安彩高科股份有限公司，河南安阳 455000)

摘要：为改善无源阻尼产生的损耗及低输出阻抗导致的电流畸变，设计了基于虚拟电阻的 LCL 型并网逆变器前馈控制策略。通过虚拟电阻增大等效阻尼，实现了尖峰削减；通过设计电网电压全前馈函数构成全前馈控制，提高了整体输出阻抗，实现了谐波电流抑制。仿真实验结果表明，该控制策略具有良好的稳态、动态和抗干扰能力。

关键词： LCL 型并网逆变器；虚拟电阻；准比例谐振控制；电网电压畸变；电网电压全前馈

中图分类号：TM464 文献标识码：A 文章编号：1007-3175(2023)08-0018-05

The Feed-Forward Control Strategy of LCL-Type Grid-Connected

Inverters Based on Virtual Resistance

JIAO Long¹, LU Xi-kun¹, LIU Wan-bing², LYU Jian-guang²

（1 School of Electronic Information and Electrical Engineering, Anyang Institute of Technology, Anyang 455000, China;

2 Henan An Cai Hi-Tech Co., Ltd, Anyang 455000, China）

Abstract: In order to reduce the loss produced by passive damping and to improve the current distortion caused by low output impedance,a feed-forward control strategy of LCL grid-connected inverters based on virtual resistance is designed in the paper. This strategy can raise equivalent damping to realize peak reduction by virtual resistors. The design of full feed-forward function of grid voltage constitutes the full feedback control, which increases the overall output impedance and realizes harmonic current suppression. The simulation results show that this control strategy has good steady state, dynamic and anti-interference ability.

Key words: LCL-type grid-connected inverter; virtual resistance; quasi-proportional resonance control; grid voltage distortion; full feed-forward of grid voltage

参考文献

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