A Novel Voltage-Sensorless Grid Voltage Full Feedforward Estimator-Based Current Control Strategy for a Grid-Connected Inverter

IF 4.9 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems II: Express Briefs Pub Date : 2025-07-21 DOI:10.1109/TCSII.2025.3590699

Qifan Wang;Qiangsong Zhao;Yuanqing Xia

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引用次数: 0

Abstract

This brief presents a novel voltage-sensorless grid voltage full feedforward estimator (GVFFE)-based current control strategy for a grid-connected inverter with an LCL filter. The grid voltage full feedforward (GVFF) signal can be directly estimated by the GVFFE using a closed-loop structure based on a repetitive controller. Furthermore, the grid voltage can be reconstructed from the estimated GVFF signal without relying on a voltage sensor. Compared with traditional GVFF methods, the GVFFE eliminates the noise amplification caused by derivative operations and compensates for computational delay. As a result, the disturbance rejection performance for grid voltage is significantly improved. The stability and harmonic suppression capabilities of the proposed strategy are comprehensively analyzed. Experimental results validate the effectiveness of the proposed control strategy, demonstrating its potential for practical applications in grid-connected inverter systems.

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一种新的无电压传感器并网逆变器电压全前馈估计电流控制策略

本文提出了一种新的基于无电压传感器电网电压全前馈估计器（GVFFE）的LCL滤波器并网逆变器电流控制策略。电网电压全前馈（GVFF）信号可以通过基于重复控制器的闭环结构直接估计。此外，在不依赖电压传感器的情况下，可以从估计的GVFF信号重建电网电压。与传统的GVFF方法相比，GVFFE消除了导数运算带来的噪声放大，补偿了计算延迟。结果表明，该系统对电网电压的抗干扰性能得到了显著提高。综合分析了该策略的稳定性和谐波抑制能力。实验结果验证了所提控制策略的有效性，显示了其在并网逆变器系统中的实际应用潜力。

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来源期刊

IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程：电子与电气

CiteScore

7.90

自引率

20.50%

发文量

883

审稿时长

3.0 months

期刊介绍： TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.