Electric Energy Processing and Storage
Code
11688
Academic unit
Faculdade de Ciências e Tecnologia
Department
Departamento de Engenharia Electrotécnica
Credits
6.0
Teacher in charge
Stanimir Stoyanov Valtchev
Weekly hours
4
Total hours
52
Teaching language
Português
Objectives
The goal of this course is to provide students with knowledge and tools to understand and intervene in the new paradigm of electrical generation, based on the integration of renewable energy sources and distributed generation.
Understanding the issues and techniques regarding the reliable operation of the electrical energy system, and the impacts of integration of renewable energy sources on the grid, is also foreseen in the course.
On the end of the course, students will be provided with advanced competences on the following subjects:
- Design of photovoltaic plants, with main focus on the paradigm of self-consumption.
- Technical issues and challenges concerning integration of dispersed generation, namely from renewable sources.
- Energy estimation of photovoltaic and wind power systems.
- Organisation of Portuguese electrical system.
- Impact of wind integration in the reliability of electrical power systems.
- Smartgrids and microgrids.
Prerequisites
N/A
Subject matter
Contents (basic and general course):
- Power electronics for renewable energy systems.
- Organisation of the Portuguese electric energy system.
- Distributed generation.
- Interconnection technical requisites.
- Renewable systems based in photovoltaic energy: design of stand-alone and grid connected systems.
- Production regimes: direct self-consumption, net-metering, small production.
- Renewable systems based in wind energy: types of turbines, power control, energy estimation.
- Impact of wind generation in the reliability of the energy system: statistical approach.
Contents (advanced topics):
Efficient energy conversion: soft switching, resonant converters; resonant switches, efficient magnetic elements. Power management and matching of complementary energy sources.
Efficient management of stored energy: electric vehicle battery management, state-of-charge and state-of-health of the battery.
Energy Harvesting: from the environmental energy (not used up to now), to supply power to equipment. Sources of harvested energy: thermal, hydraulic, pressure, mechanic vibrations, photovoltaic, electromagnetic, etc. Transducers of energy: electrical, mechanical, electronic, mixed. The human body and its activity as a source of energy: walking, working, breathing, etc. Specialized power converters: highest efficiency, lowest consumption, impedance matched, etc.
Wireless (contactless) energy transmission: transferring energy across the vacuum, water or air, making use of fields and not wires: at higher and lower power level (inductive and capacitive power transfer, electric busses, medical devices). Large distance transfer (near and far field): strong resonance, space energy projects, rectennas and directed beam transfer. Efficiency and on-line charging infrastructure for EV. Direct harvesting of solar light electromagnetic oscillations.
Bibliography
Ned Mohan, Power Electronics and Drives, MNPERE, 2003
Power Electronics, Converters, Applications and Design, N. Mohan, T. Undeland, W. Robbins, Ed.: John Wiley & Sons Inc., 2002
Power Electronics, Circuits, Devices and Applications, M. Rashid, Editora: Prentice Hall, 1993
Power Electronics, C. Lander, McGraw-Hill, 1999
Gilbert M. Masters, Renewable and Efficient Electric Power Systems, John Wiley & Sons, 2004.
Castro, R., Uma Introdução às Energias Renováveis: Eólica, Fotovoltaica e Mini-Hídrica, IST Press, 2011.
Teaching method
Theoretical-practical classes; seminar classes and laboratory.
Evaluation method
1st Way: test No.1 (30%, but with a minimum note of 8, being this test eliminatory, i.e. not permitting continuing this way), test No.2 (45%), 4 reports on laboratory exercises (25 % of the final note, being the reports compulsory for the permission= frequency);
2nd Way: 4 reports on laboratory exercises (25 % of the final note, being the reports compulsory for the permission= frequency), exam of retrying (75%).