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Application of Power Electronics in Renewable Energy Systems

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sid Shetty

on 21 September 2014

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Transcript of Application of Power Electronics in Renewable Energy Systems

Application of Power Electronics in Renewable Energy Systems
What is Renewable Energy

Why should we adapt Renewable energy Systems?
Application of Power Electronics in Renewable Energy System
Renewable energy sources are sources of energy that are naturally replenished

This includes Sunlight, Wind, Rain, Tides, Geothermal heat

Renewable energy sources does not effect or pollute the environment
Global consumption of energy has grown up by 44%

Primary sources of energy are non renewable sources of energy

Depletion of this source of energy is irreversible
Why Power Electronics?
Over the last few years there has been a lot of development in the power semiconductors devices.

Many innovative equipment have been developed.
HVDC Transmission
FACTS Devices
Hence semiconductor-based power conversion represents a
key enabling technology
to meet the challenges of tomorrow’s electricity supply

Power electronics technologies have been widely used in renewable energy systems like
hydro power, municipal solid wastes, biomass, geothermal, solar thermal, solar photovoltaic, wind power and tidal waves
Wind Energy
Micro Turbine
Solar Photovoltaic
Fuel Cell
Wind energy is the most common Renewable source of energy

Wind power, is an alternative to electricity generation methods using fossil fuels like coal

Energy generation using wind does not have ill effects on the environment
Also non-renewable sources are not eco-friendly.

This leads to greenhouse gas emissions which in turn leads to Global Warming.

Hence more and more efforts are made to adapt Renewable Energy systems.

Solar photovoltaic are completely based on the solar energy conversion principles

There are many types of single and polycrystalline crystals are used in it

These crystals provides 14% to 20% efficiency
The recent developments are discovered of the crystals having 7% to 9% power efficiency
Structure of Photovoltaic System
Future Developments
There should be more use of this energy system in countries where there is ample sunlight

Increasing the working efficiency

Decrease in cost

The energy conversion efficiency is highest compared to the other energy sources

Hence this is considered as the future energy source

It can be used for variety of applications like transportation, stationery and portable power
It converts chemical energy from a fuel into electricity through a chemical reaction with an oxidizing agent
The components used in a fuel cells are hydrogen, steam methane, hydrocarbons and alcohols like Methanol
Use of Power Electronics in Fuel cells
The output voltage is low dc and in many cases line frequency ac is required, this requires voltage step up and dc-ac inversion

To meet the dynamic load changes, energy back up is required

This is where Power electronics is used
Fuel Cell based energy Conversion System
Energy conversion System using Dc-dc Converter
Energy Power Conservation
Process of Renewable and Distributed Energy System
Types Of Rectifiers
Basic Inverter Circuit
Full transcript