నైరూప్య

Improved Grid Tie Inverter for Connecting Solar Power Generation Unit to the Main Power Supply

Unni M.R, Akhilesh K, Arjun R, Arjun P, Adharsh V

Micro solar power systems are designed for the generation of electrical power. They are generally independent of large centralized electric grids and are used in remote areas. By building grid tie inverter the house hold solar power generation systems are connected to the centralized grid system. There is a need to design a low cost single phase power inverter that can be used with small amount of power generation capacity, possibly capable by using small scale solar power generation systems who wish to supply the excess power generated to the electric grid. Operating a renewable energy system in parallel with an electric grid requires special grid interactive or Grid Tie inverter. The power processing circuits of a GTI are similar to that of a conventional portable DC-AC Converter that operates as a stand-alone device. The main differences are in their control algorithm and safety features. A GTI basically takes a variable voltage from a DC source, such as solar panel inverts it to AC synchronized with the mains. It can provide power to our loads and feed an excess of the electricity into the grid. Depending on power and voltage levels, GTIs circuits normally have from one to three stages. The project is designed to construct a 200W normal AC Output power and a 250W maximum AC Output power Grid Tie Inverter. The proposed GTI has Over Current Protection, anti islanding and Reverse Polarity Protection.