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Politecnico di Torino
Academic Year 2016/17
01PQCND
Power generation from renewable sources
Master of science-level of the Bologna process in Energy And Nuclear Engineering - Torino
Teacher Status SSD Les Ex Lab Tut Years teaching
Spertino Filippo ORARIO RICEVIMENTO A2 ING-IND/33 40 20 0 0 6
SSD CFU Activities Area context
ING-IND/33 6 D - A scelta dello studente A scelta dello studente
Subject fundamentals
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NEWS: IN 2016/17 LECTURES WILL BE ALSO AVAILABLE IN VIDEO
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The course is devoted to present both the Photovoltaic and Wind power systems, within the electric Renewable Energy sources, and the methods to correctly design the main components, to evaluate the energy production with the economic analysis of investment.
Expected learning outcomes
At the end of the course students should know the main technologies about the photovoltaic plants and wind turbines, and should be able to correctly design the main components of these power systems.
Prerequisites / Assumed knowledge
Basic knowledge about Physics, Electric circuits and Mechanics.
Contents
PHOTOVOLTAIC POWER SYSTEMS
Solar energy characterization: background. Structure of the semiconductors: energy bands; doping; p-n junction and electric field; electron hole pairs; losses in the energy conversion. Spectral response and efficiency of the main technologies: single, multi-crystalline and amorphous silicon, Cadmium Telluride, Copper-Indium- Diselenide. Surface covering per installed kilowatt. Equivalent circuit of the solar cell, I-V and P-V characteristics at variable irradiance. Focus on an application problem: series/parallel connection of cells; I-V curve mismatch and shading effect; hot spots and breakdown; bypass and blocking diodes. Datasheets of the commercial PV modules, thermal coefficients of the electrical quantities. DC-AC converters for the grid connection: Maximum Power Point Tracking (MPPT); active/reactive power control; interface protections; protections against over-current and direct/indirect contacts. Optimal coupling PV array/inverter: checking of power/voltage/current. Plant schemes; costs of installed power and produced energy. Conventional calculation of energy production: loss sources in the productivity, technical/economic analysis by the Net Present Value (NPV). Automatic Data Acquisition System, experimental results on operating PV plants, typical testing procedure. Pros and cons of Photovoltaics.

WIND ENERGY INSTALLATIONS
Characterization of the wind: speed and direction; power density; surface roughness; statistic distributions. Structure of a wind turbine: blades, hub, gearbox, electric generator, tower. Operating Principle of a wind turbine: lift and drag in a blade; pitch and yaw regulations; adjustment toward stall/feather. Equivalent circuits of induction and synchronous machines and power curve vs. wind speed. A solution for variable speed wind turbines: the doubly-fed induction generator.
Wind farms: interference among wind turbines, wind park effect. Environmental impact of wind turbines: noise. Power size, diffusion of wind installations in the world. Schemes, cost of installation and energy. Advantages and drawbacks.
Delivery modes
Models of the radiation at real and clear sky: use of "ad hoc" software. Calculation of the electrical parameters of the PV modules in ambient conditions different from the STC by datasheet of the manufacturers. Sizing of the components in a PV plant. Calculation of the energy production in a PV system. Energy balance on yearly basis in grid connected PV systems. Calculation of energy production for a wind turbine. Wind park effect in a wind farm.
Texts, readings, handouts and other learning resources
Documents provided in the web portal,
M. Patel, Wind and Solar Power Systems, 2006, CRC Press, USA.
Assessment and grading criteria
Written exam with theoretical question and numerical exercise. Oral exam only above 25/30.

Programma definitivo per l'A.A.2016/17
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