power electronics in new and renewable energy systems mohammad a. abusara lecturer in control and...
Post on 19-Dec-2015
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- Slide 1
- Power Electronics in New and Renewable Energy Systems Mohammad A. Abusara Lecturer in control and Power Electronics Renewable Energy Research Group College of Engineering, Mathematics, and Physical Sciences
- Slide 2
- Outline Microgrid Grid Connected Interleaved Inverter Exhaust Heat Energy Recovery Systems Marine Renewable Energy
- Slide 3
- Microgrid System
- Slide 4
- 35kWHr lithium-ion batteries (60kVA Inverter) 100kW micro Gas Turbine
- Slide 5
- MicroGrid: Controller Structure
- Slide 6
- Microgrid Challenges and Features Challenges Maintain stability during connection, disconnection, load application/shedding Good Load sharing in island mode Good current quality in grid-connected mode Features Seamless transfer from grid-connected mode to island mode and vice versa Improved current quality Improved transient response
- Slide 7
- Microgrid-Practical Test
- Slide 8
- Microgrid-Practical Results
- Slide 9
- The effect of virtual impedance on improving current THD
- Slide 10
- Grid Connected Interleaved Inverter
- Slide 11
- Interleaved Concept One channel is replaced by a number of channels connected in parallel Switching instants are phase shifted equally over a switching period Introduced for telecommunication power supplies (low voltage high current)
- Slide 12
- Interleaved Inverter- Advantages Smaller Power Switches Smaller capacitors Smaller Inductor
- Slide 13
- Novel DC/AC Grid Connected Interleaved Inverter Advantages over 2-level topology Smaller C and hence so high output impedance to voltage harmonics (better current THD) No need for a second L Smaller in size
- Slide 14
- Controller Structure
- Slide 15
- System Modelling
- Slide 16
- Passive Damping For active damping Sampling frequency (35kHz) is only 1.47 to 3.2 times the natural resonance frequency Passive damping is possible (small capacitor current thanks to interleaved topology)
- Slide 17
- Passive Damping R Root locus, R = 0 ohmRoot locus, R = 0.5 ohm The varying parameter in the Root Locus is the grid impedance
- Slide 18
- Controller Design Phase Lag Controller Proportional Controller K(z) =10
- Slide 19
- Robust Digital Controller Immunity to Grid Impedance Variations Excellent Current Quality (THD=2.3%)
- Slide 20
- Interleaved Grid Connected Inverter
- Slide 21
- Exhaust Heat Energy Recovery Systems
- Slide 22
- Energy Recovery System Although it is a dominant prime mover and one of the most efficient power sources, a typical modern turbocharged Diesel engine still wastes significant amounts of fuel energy. The exhaust waste heat energy can be recovered and converted into useful electrical power
- Slide 23
- Components of Exhaust Recovery System Fuel Saving 5-7% Power Boost 10-15% Turbine + High speed alternatorPower Electronics
- Slide 24
- Exhaust Energy Recovery
- Slide 25
- Organic Rankin Cycle (ORC) System
- Slide 26
- ORC System Diagram
- Slide 27
- ORC Optimisation
- Slide 28
- Customers On road trucks Off road vehicleStationary power plants
- Slide 29
- Hybrid Turbocharger
- Slide 30
- Marine Renewable Energy
- Slide 31
- Marine Renewable Energy Systems Wave Tide
- Slide 32
- Thank You
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