BY,ANUSHA K(1RG11EE006)

ARCHANA C B(1RG11EE007)SREEJA N(1RG11EE030)

SREELAKSHMI K(1RG10EE038)

Hybrid inverter is also known as smart grid inverter

Hybrid inverter is a new generation of dedicated U.P.S (unintereptedpower supply) using renewable energy for home consumption , especially for solar photovoltaic installations.

Renewable energy (solar energy , wind energy etc) sources plays an important role in electricity generation.

An inverter is an electrical device that converts direct current (DC) to alternating current (AC); the resulting AC can be at any required voltage and frequency with the use of appropriate transformers, switching, and control circuits.

Electricity from solar panels is generated only during the day , with peak

production around midday. This electricity is fluctuating and not synchronized with

the electric consumption of household . To over come this gap between what is

produced and what is required during the evening when there is no solar electricity

production , it is necessary to store energy for later use & manage energy storage

and consumption in an intelligent (smart grid).

Hybrid inverters store energy only when necessary . Entire kit is controlled by only solar power. Solar panel consists of number of silicon

cells, when sun light falls on this panel it generate the voltage signals then these voltage signals given to charging circuit. Depends on the panel board size the generated voltage amount is increased. In charging circuit the voltage signal from the board is gathered

together and stored in the battery.

This project is designed by following blocks

• Microcontroller

• Solar panel with battery.

• Relay

• Switching circuit and filter

• control circuit

• ADC/DAC

Cost efficient.

Reduce pollution.

Low maintenance.

Power management.

Automatic system.

DISADVANTAGESolar energy is only available during day time.

Freqency adjusting is difficult.

The wind & solar hybrid inverter consist of solar panel , wind turbine ,

controller , inverter & batteries , all of which can function independently

without utility power.

The wind solar hybrid system are now being used widely in different fields

, like street lighting , traffic , telecommunications base ,large scale

billboards & home power.

DC power source utilization applications include use of DC in motor vehicles and from batteries to power AC loads and use of energy from solar cells to power AC loads.

. Use of inverters in uninterruptable power supplies (UPS) allows energy to be stored as DC in batteries and used as AC when needed.

In industrial equipment such as AC motor speed controls and induction heating equipment AC is converted to DC and then converted back to AC at a different frequency or an adjustable range of frequencies.

Inverters are used in some battery powered electric vehicles and in hybrid vehicles to change DC to adjustable frequency AC to control AC motor speed.