ELECTRIC POWER SYSTEMS
The course aims to provide the basic concepts for understanding the phenomena that occur in an electrical distribution system.
1.Knowledge and understanding
The student must know
- the main functions performed by an electric power system
- the basic laws and Standards on the electric power systems
- the structural and functional characteristics of the components of the electric power systems
- the basic criteria for designing electrical components
- the operating problems of an electrical power system.
2. Applying knowledge and understanding
The student must demonstrate
- to apply the criteria for the selection and sizing of the components of an electric power system
- to understand the problems linked to the operation of an electric power system.
The student must demonstrate that he has the basic knowledge for dealing and deepening in an autonomous way the issues related to the operation of an electrical distribution system.
4. Communication skills
The student must demonstrate the ability to easily explain to people the operation of the main components of the electric power system and the problems linked to the operation of an electric power system.
5. Learning skills
The student must be able to update information about electric power systems through texts and publications relating to the field of electric power systems in order to acquire the ability to undertake further courses, specialized seminars and to be able to undertake further studies on the electric power systems
The student must have acquired the following knowledge provided by the Electrical circuits and Network Analysis Course:
The circuit model: ideal circuit elements, voltage and current. Kirchhoff’s laws. Linear resistive circuits: series and parallel equivalence, superposition principle, Thevénin-Norton’s theorem. Linear circuits in DC and AC steady state. Complex power, active power, reactive power, and conservation properties. Dynamical circuits, general methods of solution. Symmetric three-phase circuits: balanced, unbalanced.
Introduction to the electric power system (1 ECTS – 8 hours):
- The subsystems of production, transmission, distribution and utilization (0.5 ECTS - 4 hours)
- Classification of the electric power systems. Topology of the structures of the MV and LV electrical distribution systems. (0.5 ECTS - 4 hours)
Technological characteristics and principles of operation of the main components of an electrical distribution system (5 ECTS – 40 hours):
- Electrical transmission and distribution lines (0.5 ECTS – 4 hours);
- Switching devices (1.5 ECTS – 12 hours);
- Relay (1 ECTS – 8 hours);
- Protection systems of the MV and LV distribution systems (1.5 ECTS – 12 hours);
- Distribution substations and switchboards (0.5 ECTS 4 hours).
Basic criteria for sizing components (3 ECTS – 10 hours of lesson + 14 hours of numerical exercise):
- Classification of electrical consumers. Evaluation of the electrical loads. (0.5 ECTS - 2 hours of lesson + 2 hours of numerical exercise)
- Sizing of a transformer, thermal and electrical criteria for designing the MV and LV power lines. (2.5 ECTS - 8 hours of lesson + 12 hours of numerical exercise)
The course is divided into two parts. The first part illustrates the technological characteristics and the principle of operation of the main components of an electrical installation. The second part refers to the basic criteria of design of the electrical distribution systems.
Lectures, classroom exercises
1) V. Mangoni, G. Carpinelli, P. Varilone: Elementi di impianti elettrici di media e bassa tensione. Edizioni Università di Cassino
2) Turan Gonen: Electric Power Distribution System Engineering, Taylor & Francis, 2007
3) Notes provided by the teacher
The exam is an oral test.
The first question is the resolution of an exercise where the student must demonstrate that he has learned the basic concepts of the sizing of the electrical lines.
Then, the exam involves two questions in which the level of knowledge of the topics addressed during the course is assessed.
One questions is on the technological characteristics and principles of operation of the components of an electrical distribution system; the second question regards the operation of the electrical power system.
A sufficient answer to the first question is a fundamental requirement to continue the exam.
The exam has a total duration of approximately 40-50 minutes.
The final grade is the average of the grades obtained by the student for the questions.
Information about the time table for student interaction are at the following link
Lectures are in Italian. The professor is fluent in English and is available to interact with students in English, also during the examination.