Grid Synchronization in a 3-Phase Inverter using Double Integration Method

Q3 Engineering

WSEAS Transactions on Power Systems Pub Date : 2024-05-14 DOI:10.37394/232016.2024.19.19

Faheem Farooq, Kamran Hafeez, B. Sabbar, M. Mnati

引用次数: 0

Abstract

Distributed renewable energy sources (DRESs) have additional benefits compared with conventional fossil fuel-based energy sources. These sources are connected to the utility grid using a suitable synchronization method. It requires accurate information on grid voltage magnitude and phase angle. But the presence of harmonics, DC Offset, and voltage unbalances makes the synchronization process more challenging. Conventionally synchronous reference frame (SRF)- PLL is implemented for this purpose, however, it has a problem with 100Hz ripple during distorted grid conditions. A double integration method (DIM) is administered for the synchronization of a 3-phase inverter under non-ideal grid conditions. It is important for DIM implementation to remove the DC offset or integrating constants of pure integrators without involving any phase shift. This method is also compared with conventional SRF-PLL based on mathematical modelling and simulations using a MATLAB/Simulink toolbox. The results are verified based on ideal and non–ideal grid conditions and also tested on grid-connected 3-phase Inverter.

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使用双重积分法在三相逆变器中实现电网同步

与传统的化石燃料能源相比，分布式可再生能源（DRES）具有额外的优势。这些能源通过合适的同步方法与公用电网相连。这需要电网电压幅值和相位角的准确信息。但谐波、直流偏移和电压不平衡的存在使同步过程更具挑战性。传统的同步参考框架（SRF）- PLL 可用于此目的，但在电网畸变条件下会产生 100Hz 的纹波。为了在非理想电网条件下实现三相逆变器的同步，采用了双积分法（DIM）。对于 DIM 的实施而言，重要的是消除纯积分器的直流偏移或积分常数，而不涉及任何相移。在数学建模和使用 MATLAB/Simulink 工具箱模拟的基础上，该方法还与传统的 SRF-PLL 进行了比较。结果根据理想和非理想电网条件进行了验证，并在并网三相逆变器上进行了测试。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

WSEAS Transactions on Power Systems Engineering-Industrial and Manufacturing Engineering

CiteScore

1.10

自引率

0.00%

发文量

期刊介绍： WSEAS Transactions on Power Systems publishes original research papers relating to electric power and energy. We aim to bring important work to a wide international audience and therefore only publish papers of exceptional scientific value that advance our understanding of these particular areas. The research presented must transcend the limits of case studies, while both experimental and theoretical studies are accepted. It is a multi-disciplinary journal and therefore its content mirrors the diverse interests and approaches of scholars involved with generation, transmission & distribution planning, alternative energy systems, power market, switching and related areas. We also welcome scholarly contributions from officials with government agencies, international agencies, and non-governmental organizations.