EFFECT OF TEMPERATURE AND SOLAR IRRADIANCE ON THE PERFORMANCE OF 50 HZ PHOTOVOLTAIC WIRELESS POWER TRANSFER SYSTEM

Abstract

The previous researchers on wireless power transfer (WPT) systems were able to transmit the AC power, although their AC frequencies were high in some kilohertz or megahertz. They were unable to be applied directly on the AC loads or only administered to the DC energy after rectification through a rectifier circuit. In the receiver phase, the AC power was also very low, due to the minimum voltage and current on the receiver coil (RC). Therefore, this study aims to determine the effects of temperature and solar irradiance on the performance of the 50 Hz photovoltaic wireless power transfer (PVWPT) system. It is constructed by some PV modules in series connection, to achieve a required DC voltage level on the DC-DC converter and receiver phase. It also converts DC to AC voltages on the transmitter coil (TC) of an H-bridge inverter, with a receiver circuit and a magnetic relay coil positioned between the TC and RC. The results showed that solar irradiance and temperature affected the performances of the PV module and PVWPT system. This indicated that higher solar irradiance increased the performance of the PVWPT system, whose maximum efficiency was achieved by positioning the magnetic relay coil between the TC and RC. At the solar irradiance and temperature of 100 W/m2 and 26°C, the lowest value of PVWPT efficiency was 47.92%. Meanwhile, the highest value was 48.1% at 1000 W/m2 and 29°C. This proved that the efficiency of the PVWPT system ranged from 47.92-48.1%, with its average value being 48%.