Knowledge and understanding: to know and understand the fundamental principles of planning, construction, operation and control of electric power systems. To know the analysis techniques of electric power systems, both in steady state and with regard to the main dynamic phenomena.
Applying knowledge and understanding: to be able to carry out calculations/evaluations/checks/predictions relevant to electric power systems, both referring to specific transmission lines and to extended and complex transmission networks.
Making judgements: to be able to apply the acquired knowledge in order to solve/analyze problems in the field of electric power systems.
Communication skills: to be able to explain/describe using the proper technical terminology the various problems and possible solutions concerning the different operative aspects of electric power systems.
Learning skills: to be able to extract correct information from text books and other sources to be used for the study, the analysis and the autonomous solution of problems connected with the transmission of the electric energy.

The subjects treated in this course are based/connected mainly to those treated in the courses Impianti Elettrici and Electrical Machines. A suitable knowledge of the main mathematical tools, of electrotechnics, and some of the base-concepts of systems theory is required as well.

1. Voltage and current propagation on power lines (propagation constant, surge impedance) 2. Analysis of power transmission lines (overhead lines, cables, gas insulated lines, HVDC lines; conductor types, static and dynamic thermal rating, conductors cross section choice; EM field of transmission lines) 3. Load flow analysis (schemes of electrical substations; admittance model of the network; impedance model of the network; load-flow equations and Newton-Raphson solution; phase shifter transformers) 4. Calculation of three-phase power systems in case of unsymmetrical faults and steady-state conditions (Fortesque theorem, symmetrical components method) 5. Neutral grounding (analysis of the different solutions). Ground protections. Distance protections and differential line protections. Examples and applications concerning all the main subjects are developed and commented throughout the course. The course is completed by a seminar on subject to be agreed, hold by professional electrical engineers.

For attending students, the main study material are lessons notes and the wide amount of explanation, deepening and integration documents provided by the teacher in a shared dropbox folder.

Recommended text-books:
“Trasmissione e generazione dell’energia elettrica” - N. Faletti, P. Chizzolini – Patron.
“Impianti elettrici” – F. Iliceto – 2. ed. - Bologna : Patron, ©1984.
“Power system analysis” - J. J. Grainger, W. D. Stevenson – McGraw-Hill.

Other useful text-books:
“Lezioni di trasmissione dell'energia elettrica” - A. Paolucci - 4. ed. - Padova: Cleup, 1998.
“Lezioni di impianti elettrici” 1 – Antonio Paolucci - Ed. aggiornata. - Padova: Cleup, 1997.
“Lezioni di impianti elettrici” 2 – A. Paolucci - Padova: Cleup, 1997.
“Impianti elettrici” – R. Benato, L. Fellin – UTET Scienze Tecniche, 2011.

1. Voltage and current propagation on power lines; surge impedance; surge impedance loading; propagation constant.

2. Analysis of power transmission lines; overhead lines, cables, gas insulated lines, HVDC lines.

3. Load flow analysis; description of the net through the admittance matrix; load-flow equations; Newton-Raphson method; phase shift transformers. Contingency analysis. N-1 criterion.

4. Calculation of three-phase power systems in case of unsymmetrical faults and steady-state conditions; single-phase fault, two-phase fault, two-phase to ground fault; calculation of short circuit currents and overvoltages.

5. Neutral grounding; high voltage, medium voltage and low voltage power systems; neutral directly connected to earth, insulated neutral, neutral with resistance to earth, neutral with reactance to earth, compensated neutral. Ground protections. Distance protections and
differential line protections.

Examples and applications concerning all the main subjects are included and provided throughout the course.

Lessons and exercises will be in frontal modality. Students are invited to an active participation asking questions, exposing doubts and so on. Integrations and deepenings are stimulated/enabled by the several and very different files (more than 120) provided by the teacher in a dropbox folder shared with all students.

Learning will be verified through oral examination in the form of a conversation with an average duration of about 45 minutes.
The oral examination includes several questions. Some of them deal with a general overview of individual subjects with the aim of verifying the overall vision and the exposition skills of the student. Other questions deal with more specific aspects and require the discussion of individual points.
Generally speaking, questions have the goal to evaluate the understanding of the subjects, problems and solutions studied, and request just a minimum mnemonic effort/study.

The score of the examination consists in a vote expressed in thirties. In order to pass the exam (18/30), the student must prove to have acquired a sufficient knowledge of all the subjects treated during the course. In order to get the maximum score (30/30 and praise), the student must prove to have acquired an excellent knowledge of all the subjects treated during the course.