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Politecnico di Torino
Academic Year 2015/16
01NKVNC
Power systems
Master of science-level of the Bologna process in Electrical Engineering - Torino
Teacher Status SSD Les Ex Lab Tut Years teaching
Carpaneto Enrico ORARIO RICEVIMENTO AC ING-IND/33 80 0 20 0 13
SSD CFU Activities Area context
ING-IND/33 10 B - Caratterizzanti Ingegneria elettrica
Subject fundamentals
The course belongs to the learning area of Electroenergetic systems and is aimed at providing the fundamental notions for the understanding and analysis of the steady-state and dynamic phenomena in power systems, in particular in high voltage transmission systems. The contents refer to the structure and model of transmission systems, numerical techniques for load-flow calculations in steady-state conditions, frequency and voltage control systems, and behaviour in fault conditions. The topics are developed with an application focus, orientated towards the issues referred to the Italian and European power systems.
Expected learning outcomes
The course contents aim at providing knowledge and understanding skills referred to the physical phenomena, to the models and to the numerical techniques for the power systems in normal and fault conditions, as well as power system dynamics and control.
On the application side, knowledge and understanding aspects refer to the ones indicated for the Electroenergetic systems learning area. The minimum objectives of the course include:
- ability to solve simple circuits representative of the problems characterising the power systems in normal and fault conditions;
- ability to correctly formulate and handle power system models and equations;
- knowledge of the numerical techniques for the solution of the power system equations;
- knowledge of the principles and architecture of frequency and voltage control systems;
- understanding of the physical meaning of the major phenomena occurring in power systems.
Prerequisites / Assumed knowledge
Knowledge and skills required as prerequisites for attending the course refer to:
- basic notions of matrix calculations, electrical circuit analysis, automatic control systems;
- structure of the electrical systems for electrical energy production, transmission and utilization;
- behaviour of electrical machines in normal and fault conditions;
- basic programming (e.g., Matlab)
Contents
1. Power systems components (22 hours)
Per unit method. Electrical lines: equations, parameters, equivalent circuits. Fundamental problems of the power transmission, line with: no load, surge impedance load, assigned voltage at both ends. Two and three windings transformers. Generators. Loads.

2. Normal operation (18 hours)
Network structures, nodes and branches. Admittance and impedance matrices. Load-flow equations. Load-flow solution methods. Approximate models and methods. Active / reactive decoupling. Elementary two-node system: angle and voltage stability. Active and reactive flow control. Control transformers. Operating constraints. Power system states. N-1 security.

3. Fault analysis (18 hours)
Short circuit current components. Short circuit sources. Rotating machine behaviour. Network and component models. Three-phase faults. Symmetrical components. Asymmetrical faults. Earth fault and earthing systems.

4. Frequency and active power control (18 hours)
Generator speed control. Frequency primary control. Frequency secondary control. Frequency and power control with interconnected areas. Emergency control.
Delivery modes
In addition to lectures (76 hours), the course programme includes computer laboratory activities (24 hours) with the development of simple Matlab programs for transmission line analysis, load-flow solution of a 2-node system, symmetrical and asymmetrical fault analysis of a 3-node system.
Texts, readings, handouts and other learning resources
There is no text covering the whole course topics.

Reference textbooks:
F.Iliceto, "Impianti elettrici", vol. 1, Patron, Bologna, ISBN 978-8855517256 (in Italian).
J.J.Grainger, W.D.Stevenson, Power system analysis, McGraw Hill, ISBN 978-0070612938.
P.Kundur, Power system stability and control, Tata McGraw Hill, ISBN 978-0070635159.

Other books:
R.Marconato, Electric power systems. Vol.1 - Background and basic components. CEI - Comitato Elettrotecnico Italiano, Milano, ISBN 88-432-0014-3.
R.Marconato, Electric power systems. Vol. 2 - Steady-state behaviour controls, short circuits and protection systems. CEI - Comitato Elettrotecnico Italiano, Milano, ISBN 88-432-0025-9.
R.Marconato, Electric power systems. Vol. 3 - Dynamic behaviour, stability and emergency controls. CEI - Comitato Elettrotecnico Italiano, Milano, ISBN 978-8843200610.
Assessment and grading criteria
The exam consists of a written test with theory questions (maximum score 27/30) and the evaluation of one of the computer programs developed during computer laboratory activities (maximum score 3/30). The total score is the sum of the scores of the written test and of the computer program. The computer program submission is not mandatory, but it requires the attendance of the computer laboratory activities.

Programma definitivo per l'A.A.2017/18
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