POWER SYSTEMS II
2° Year of course - Second semester
Frequency Not mandatory
- 6 CFU
- 48 hours
- Lessons are given in Italian. Part of the material provided to the students during the course, as well as one of the reference books indicated, are in English.
- Trieste
- Opzionale
- Standard teaching
- Oral Exam
- SSD ING-IND/33
- Advanced concepts and skills
Knowledge and understanding: to 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 necessary prerequisite for this course is to have passed the previous course Sistemi elettrici per l'energia I.
More generally, 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 regulation: Primary and secondary voltage regulation; reactive power control; tap staggering of autotransformers; static var compensators; power quality; European standard 50160; incentive regulation of power quality. 2. Analysis of power systems stability: Steady-state stability of synchronous generators; dynamic stability of synchronous generators; transient stability of synchronous generators; means to improve stability of synchronous generators; voltage instability. 3. Frequency regulation Study of the system turbine-generator in isolated operation; analysis of speed controllers; speed droop; primary control and load sharing between several generators; secondary control in one control area; power-frequency control in interconnected power systems; autonomy criterion; load shedding. 4. Blackout and system restoration: Analysis of large events including the Italian blackout of the year 2003; restoration plan; restoration paths; black startup units; load rejection. 5. Energy storage systems Applications of energy storage in power systems; energy storage systems performances and classification; main storage technologies. 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. The course includes a technical visits to Padriciano 220 kV electrical substation (Terna SpA, Italian TSO).
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:
“Impianti elettrici” – F. Iliceto – 2. ed. - Bologna : Patron, ©1984.
“Trasmissione e generazione dell’energia elettrica” - N. Faletti, P. Chizzolini – Patron.
“Power system analysis” - J. J. Grainger, W. D. Stevenson – McGraw-Hill.
“Sistemi elettrici per l'energia – analisi e controllo” - Fabio Saccomanno – UTET, collezione di elettrotecnica ed elettronica.
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 regulation: primary regulation, secondary regulation; reactive power control; reactive power compensators; active and passive reactive power compensators; static var compensators. Power quality and European Standard EN 50160. 2. Analysis of power systems stability (steady-state stability of synchronous generators; dynamic stability of synchronous generators (hints); transient stability of synchronous generators; means to improve stability of synchronous generators; voltage instability). 3. Frequency regulation (study of the system turbine-generator in isolated operation; analysis of speed controllers and synthesis of the speed controller; speed droop; primary control and load sharing between several generators; secondary control in one control area; power-frequency control in interconnected power systems; autonomy criterion). 4. Blackout and system restoration (analysis of large events including tha large Italian blackout of the year 2003; restoration plan; restoration paths; black startup units; load rejection). 5. Energy storage systems (applications of energy storage in power systems; energy storage systems performances and classification; main storage technologies). The course is completed by a seminar on subject to be agreed, hold by professional electrical engineers. Examples and applications concerning all the main subjects are included and provided throughout the course. The course includes a technical visit to Padriciano 220 kV substation owned by Terna SpA, the Italian TSO (220 kV and 132 kV AIS; 220 kV interconnector Italy-Slovenia; Phase Shifter Transformer; 132 kV insulated cable; 132 kV capacitors bank).
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 files 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.