Role of power electronics in renewable and non renewable sources
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The document discusses the role of power electronics in renewable and non-renewable energy sources. It describes several renewable energy systems that use power electronics including wind turbines, photovoltaic solar panels, and wave energy converters. It also discusses some non-renewable systems like internal combustion engines, microturbines, and fuel cells. Power electronics provide flexibility to integrate energy storage, maximize output of renewable sources, and improve the overall efficiency of energy generation and delivery to the electric grid.
Role of power electronics in renewable and non renewable sources
- 1. THE ROLE OF POWER ELECTRONICS IN RENEWABLE AND NON RENEWABLE SOURCES Presented by R.MAHESH KUMAR B.tech,E.E.E swarnandhra college seetharampuram
- 2. According to International Energy Agency (IEA) data from 1990 to 2008, the average energy use per person increased 10% while world population increased 27%. And as of 2010, about 16% of global final energy consumption comes from renewable but at the same time the fossil fuels (liquid, coal and natural gas) have been the primary energy source for the present day world which is of non-renewable energy system. So the renewable as well as non-renewable energy system both is important for human development. INTRODUCTION
- 3. RENEWABLE SYSTEMS Renewable generation units are, 1. Wind energy system 2. Photovoltaic system 3. Wave energy system
- 4. NON RENEWABLE SYSTEMS Non-renewable generation units, 1 . Internal combustion engine systems 2 . Micro turbine systems 3 . Fuel cell systems
- 6. 1.Wind energy system Wind power is the conversion of wind energy in to useful form of energy i.e electrical energy. the diagram shows conversion wind energy in to electrical energy . Between the grid and the generator a power converter can be inserted. The electrical output can either be AC or DC. In the last case a power converter will be used as interface to the grid. High frequency direct AC-AC conversion has also been proposed as coupling of wind energy conversion systems to the grid.
- 7. 2.Photovoltaic system Photovoltaic energy systems consist of arrays of solar cells. By the figure, PV modules are connected in series and/or in parallel and then connected to a centralized DC/AC converter.
- 8. 3.WAVE ENERGY • Wave energy is the transport of energy by ocean surface waves, and the capture of that energy to do useful work – for example, electricity generation, water desalination, or the pumping of water (into reservoirs) • The primary advantage of most power electronic coupling is the possibility to integrate energy storage units such as super capacitors, or superconducting
- 9. 4.INTERNAL COMBUSTION SYSTEM • The internal combustion engine system firstly converts chemical energy into mechanical energy which in turn spins a shaft to convert the mechanical energy into electrical energy. • The energy can be converted in DC as well as AC With power electronics as interface, the combined efficiency of engine- generator can be optimized and provide the flexibility of adding energy storage systems
- 10. 5.MICRO TURBINE • Micro turbine system has shafts spinning at up to120.000 rpm driving a high speed generator. The high frequency output from the generator is first rectified and then converted to grid frequency AC power. • Then a DC-AC inverter is used to build up three phase voltages at the frequency of the grid. Typical power electronic coupling for a micro turbine system
- 11. The microturbine generator feeds three phase power into a rectifier and the DC is then fed into a high frequency single phase inverter so that a compact high frequency transformer can be used. The secondary of the transformer feeds an AC- AC converter that takes the single phase high frequency voltage to produce a three phase voltage For High frequency AC link coupling for a microturbine system
- 12. 6.FUEL CELLS • These are electrochemical devices that produce electricity without any intermediate power conversion stage. The advantage is the energy density that is nearly 10 times that of a battery. Fuel cells like PV systems produce DC power
- 13. POWER ELECTRONICS COSTS AND OTHER COSTS FOR DER’s SYSTEMS Fig: Power electronics costs compared to total capital costs for distributed energy systems
- 14. CONCULSION; The unique advantages of using power electronic couplings have been discussed throughout the paper and can be summerised in the following features: - Flexibility to integrate energy storage units in the - Maximum power point tracking for PV and wind energy systems, - Dispatching capabilities with energy storage units, - Improved efficiency, - Variable speed operation ability allowing for fuel usage optimisation. In order to make possible all the potentialities mentioned in the paper, intensive research and development in the power electronics technology is strongly needed.