A Real and Accurate Grid Control System with Photovoltaic Power and Frequency Variation

Abstract

The power grids are major constrains in the power controlling system, in this photovoltaic concept is playing key role. The grid codes can be deciding the harmonicsto network connected cells. The earlier method incorporated through frequency depended resonance controller. These are controlling the current loops and voltage shorts. The phase locked-loop can control the phase angle and performance accuracy. The resonance controllers are working based on FSPLL methodology but these method cannot control the harmonics at frequency variations. The FSPLL (Filtered sequence phase locked loop) is facing the above limitations therefore an advanced harmonics controlled methodology is compulsory. In this research work adaptive network based fuzzy interface system(ANFIS) controller is proposed in place of FSPLL. It is an advanced controller and solves above limitations. At frequency F=50Hz the threshold value is 6.27%, At F=51.5Hz THD= 6.42%, At F=51.5Hz unbalanced condition THD= 7.52%.