An improved grid voltage observation method for grid-connected inverter

被引：0

作者：

Song, Shuping ^{[1
]}

Sun, Xiaobo ^{[2
]}

Zhang, Zhihao ^{[3
]}

Bao, Huping ^{[3
]}

机构：

[1] Changshu Inst Technol, Sch Elect & Automat Engn, Changshu, Jiangsu, Peoples R China

[2] Yangtze Power Co Ltd, Yichang, Hubei, Peoples R China

[3] Jiangsu Equat Elect Power Technol Co Ltd, Wuxi, Jiangsu, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODELLING IDENTIFICATION AND CONTROL | 2024年 / 44卷 / 01期

关键词：

grid voltage observation; predictive control; grid-connected inverter; GCI; sliding mode observer; SMO; phase-locked loop; PLL;

D O I：

10.1504/IJMIC.2024.135555

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The voltage observation method via sliding mode observer (SMO) is widely used in the predictive control of grid-connected inverter (GCI) without AC voltage sensor. However, conventional methods not only need complex phase and amplitude compensation, but also are greatly affected by low-order harmonics of grid voltage. Therefore, a simple method of voltage phase and amplitude compensation is proposed, which is based on the conventional SMO. Besides, an improved phase-locked loop (PLL) is also adopted to reduce the interference of low-order harmonics in power grid. The improved PLL eliminates the interference of 5th and 7th harmonics and realises the accurate observation of power grid frequency and angle. The effectiveness of the proposed method is verified by MATLAB/Simulink simulation.

引用

页码：88 / 96

页数：10

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