Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Maximum Power Point Tracking Technique of PV System for the Tracking of Open Voltage according to Solar Module of Temperature Influence
Authors Jung-Min Seo ; Woo-Cheol Lee
DOI 10.6113/TKPE.2021.26.1.38
Page pp.38-45
ISSN 1229-2214
Keywords MPPT (Maximum Power Point Tracking); Solar system; Photovoltaic arrays; Module temperature
Abstract The photovoltaic module has the characteristic of changing its output characteristics depending on the amount of radiation and temperature, where the arrays that connect them in series and parallel also have the same characteristics. These characteristics require the MPPT technique to find the maximum power point. Existing P&O and IncCond cannot find the global maximum power point (GMPP) for partial shading. Moreover, in the case of Improved-GMPPT and Enhanced Search-Skip-Judge-GMPPT, GMPP due to partial shading can be found, but the variation in the open voltage during temperature fluctuations will affect the operation of the Skip and will not be able to perform accurate MPPT operation. In this study, we analyzed the correlation between voltage, current, and power under solar module and array conditions. We also proposed a technique to find the maximum power point even for temperature fluctuations using not only the amount of radiation but also the temperature coefficient. The proposed control technique was verified through simulations and experiments by constructing a 2.5 kW single-phase solar power generation system.