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基于虛擬電阻的LCL型并網逆變器前饋控制策略

來源：電工電氣發布時間：2023-08-28 14:28 瀏覽次數：502

基于虛擬電阻的LCL型并網逆變器前饋控制策略

焦龍¹，魯西坤¹，劉萬兵²，呂建光²

(1 安陽工學院電子信息與電氣工程學院，河南安陽 455000；

2 河南安彩高科股份有限公司，河南安陽 455000)

摘要：為改善無源阻尼產生的損耗及低輸出阻抗導致的電流畸變，設計了基于虛擬電阻的 LCL 型并網逆變器前饋控制策略。通過虛擬電阻增大等效阻尼，實現了尖峰削減；通過設計電網電壓全前饋函數構成全前饋控制，提高了整體輸出阻抗，實現了諧波電流抑制。仿真實驗結果表明，該控制策略具有良好的穩態、動態和抗干擾能力。

關鍵詞： LCL 型并網逆變器；虛擬電阻；準比例諧振控制；電網電壓畸變；電網電壓全前饋

中圖分類號：TM464 文獻標識碼：A 文章編號：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

參考文獻

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基于虛擬電阻的LCL型并網逆變器前饋控制策略