The Influence of Solar Irradiance and Temperature on The Pll-Synchronized Inverter Within Grid-Connected PV Systems

This study assesses the influence of solar irradiance and temperature on αβPLL synchronized inverters by investigating their intricate  relationship within grid-connected PV systems. The intermittent nature of the DC side of these systems can significantly impact their  performance. However, the extent of this impact remains uncertain when employing the stationary reference frame PLL (αβPLL)  algorithm for synchronization with the utility grid. Employing simulation in MATLAB 2020a and a Model Based Design approach in the  Simscape toolbox of SIMULINK, we conducted this investigation through two test scenarios: one with constant solar irradiance and  varying temperature, and the other with varying solar irradiance and constant temperature. Our results indicate that fluctuations in solar  irradiance and temperature have minimal effects on the output parameters of grid-connected PV systems when synchronized with the  stationary reference frame PLL (αβPLL) algorithm. This conclusion is supported by the total harmonic distortion values, which all fall  within the specified limits of IEEE Standard 929- 2000. These findings underscore the potential of αßPLL synchronization as a promising  technique, capable of effectively synchronizing grid inverters even in the presence of DC input distortion. This proficiency in grid  integration holds promise for enhancing the integration of renewable energy sources into the grid, thereby bolstering power availability  for household distribution.