Study of Performance Evaluation Method of PCS for Solar Power Generation by Digital Analysis

Abstract

An installation of solar power generation system was limited to places with good sunshine conditions, but it tends to be built in various places and areas. Generated electric power is influenced by various factors such as weather condition and installation environment, and it depends greatly on performance of power conditioners (PCSs) cooperating with a grid. For the PCS conversion efficiency, measurement of static conversion efficiency and MPPT efficiency under certain conditions is specified by IEC and UL. However, the factors such as change of weather conditions and installation environment, the methods of performance evaluation corresponding to dynamic change which changes with every moment are not clear, and comprehensive evaluation including static evaluation is difficult. For this reason, we proposed a method to obtain step response of solar irradiance as a performance evaluation by analysis which can be comprehensively evaluated as a power generation amount of photovoltaic power generation systems.