Parameters Influence on MPPT Efficiency for Single-Phase Grid-Connected Photovoltaic System

2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON) Pub Date : 2023-05-09 DOI:10.1109/ECTI-CON58255.2023.10153203

U. Prasatsap, N. Nernchad, S. Srita, T. Kaewchum, C. Termritthikun, S. Somkun

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Abstract

The single-phase grid-connected photovoltaic (PV) system was studied by simulating in MATLAB-Simulink program. This research aimed to study the influence of two parameters on the maximum power point tracking (MPPT) efficiency, e.g., a PV capacitor (CPV) and voltage step size. The maximum power point was tracked by using the perturbation and observation (P&O) algorithm with the PV voltage-loop and current-loop controller of the converter. The system was able to simulate a sudden increase or decline in irradiance. The result showed that the reducing voltage step size can track for better maximum power point of the PV array. The ripple voltage and ripple power have reduced values. The increased CPV value affects the overshoot, which has a reduced value and a faster response time for returning to a steady state. Therefore, the suitable CPV of 200 μF obtains the MPPT efficiency of 99.969% with a reduced overshoot and faster time response.

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参数对单相并网光伏系统MPPT效率的影响

采用MATLAB-Simulink软件对单相光伏并网系统进行了仿真研究。本研究旨在研究两个参数对最大功率点跟踪(MPPT)效率的影响，即PV电容器(CPV)和电压步长。采用微扰观测(P&O)算法，结合变换器的PV电压环和电流环控制器，对最大功率点进行跟踪。该系统能够模拟辐照度的突然增加或下降。结果表明，减小电压步长可以跟踪光伏阵列较好的最大功率点。纹波电压和纹波功率降低。CPV值的增加会影响超调，它的值会降低，并且返回稳定状态的响应时间会更快。因此，适宜的CPV为200 μF时，MPPT效率可达99.969%，超调量减小，时间响应加快。

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2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)

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