Synchronization of Photo-voltaic system with a Grid

The study addresses the architecture of a hybrid PLL circuit technique for synchronizing a PV system with single phase grid. For determination of synchronization, the PV system is based on a reference system .The reference system is controlled by a microcontroller and pulse width modulation technique is used within the microcontroller to trigger the inverter in order to achieve efficient synchronization. Optocoupler is used to detect the real-time zero crossing detection and the digital phase lock loop system is used to control the phase angle and frequency of the system. The architecture of system is designed in Proteus simulator. The proposed architecture has performed well in reducing the harmonics produced because of inverter switching. Also if there are any abrupt changes in frequency or phase angle, the system can effectively manage changes.