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Fully Parallel Embedded Z-Source Inverters Applied to Grid-Connected Photovoltaic Systems | ||
| Modeling and Simulation in Electrical and Electronics Engineering | ||
| دوره 5، شماره 1 - شماره پیاپی 19، تیر 2025، صفحه 33-41 اصل مقاله (764.77 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22075/mseee.2025.38183.1216 | ||
| نویسندگان | ||
| Leila Mohammadian* 1؛ Saeid Khani2 | ||
| 1Department of Electrical Engineering, Shab.C., Islamic Azad University, Shabestar, Iran. | ||
| 2East Azarbaijan Electric Power Distribution Company, Tabriz, Iran. | ||
| تاریخ دریافت: 10 تیر 1404، تاریخ بازنگری: 12 شهریور 1404، تاریخ پذیرش: 02 مهر 1404 | ||
| چکیده | ||
| This paper presents a performance-enhanced control strategy for Fully Parallel Embedded Z-Source (FPEZ) inverters in grid-connected photovoltaic (PV) systems. Unlike traditional Z-source inverters, the FPEZ topology embeds two isolated DC sources in series with each inductor of the X-shaped network, enabling the use of two PV panels and resulting in a smoother DC input current, reduced capacitor voltage stress, and an improved dynamic response under irradiance variations. The proposed control system consists of two parts: a slope-based (dp/dv) Maximum Power Point Tracking (MPPT) algorithm to regulate the shoot-through time, and a p–q current control method to generate the reference current. This dual approach ensures the injection of high-quality power into the grid while maintaining the DC-link capacitor voltage at its reference value. Simulation results in PSCAD/EMTDC validate the robust performance of the proposed structure and control strategy under partial shading and grid disturbances. The outcomes demonstrate a total harmonic distortion (THD) of less than 0.5%, a unity power factor, and stable DC-link voltage regulation at approximately 550 V, confirming the system's viability for high-efficiency, grid-compliant PV applications. | ||
| کلیدواژه‌ها | ||
| FPEZ-source؛ grid-connected inverter؛ grid-connected photovoltaic system؛ MPPT؛ PSCAD/EMTDC | ||
| مراجع | ||
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