POWER SYSTEM DESIGN

[371MI]
a.a. 2025/2026

2° Year of course - Second semester

Frequency

  • Italian
  • Trieste
  • Opzionale
  • Oral Exam
Curricula: SISTEMI
Syllabus

Knowledge and understanding: understand the fundamental principles of the electrical power systems design, know the regulatory framework, understand how to choose the various components of a power system, know the peculiarities of various applications.
Applying knowledge and understanding: be able to apply the sizing and protection criteria, be able to coherently the acquired skills in order to design an electrical power system able to comply with the applicable regulations and to provide the required performances.
Making judgements: be able to apply the acquired knowledge to solve design problems, be able to make sizing choices balancing costs and benefits.
Communication skills: acquire the technical and scientific language required to expose and discuss technical and theoretical problems in the field of electrical power systems' design.
Learning skills: be able to collect information from text books, regulations, datasheets, databases, and conference proceedings in order to autonomously solve problems regarding the electrical power systems' design.

Electrical Power Systems

1. Introduction
Overview; Definitions and Classifications; Recall of electrical power systems course
2. The project
Introduction to the design activity; Regulatory framework; The design process; graphic symbols
3. Design data
Introduction; General data, building data, external influences data, power system data, interface data
4. Analysis, classification and grouping of loads
Load diagram, conventional power and operating current; load and contemporaneity factors; Conventional power; Thermally equivalent current; Loads balance
5. Choice and sizing of cables
Definitions; Cable technologies; Thermal behavior; Definition of ampacity; Laying methods and ampacity effect; Electrical parameters and designation codes; Fire safety requirements; Cable choice criteria; Design and verification calculation; Sizing methods; Minimum sections; Application examples
6. Protection against overcurrent
Definitions; Recall on short circuits and overloads; Short-circuit currents calculation; Minimum conventional short-circuit current; Switching and protection devices; Protection against overloads; Protection against short circuits; Combined protection; Protection of phase and neutral; Selectivity of overcurrent protections; Protection of asynchronous motors; Application examples
7. Protection against overvoltages
Surge classification; Insulation coordination; Overvoltage protection
8. Electrical safety
Safety, damage, and risk concepts; Risk factors and regulatory aspects; Protection against touch voltages; Grounding system prescriptions; Calculation of ground resistance; Global earth; Differential protection devices; Protection against indirect contacts in BT; Differential protections selectivity; Protection against direct contacts; Application Examples
9. MV / LV electrical substations
Definitions and classification; connection to the distribution grid; Typical topologies; Sizing; Protection systems; Selectivity of the protection devices; Cabin grounding system; Auxiliary services; Ventilation; Project Example
10. Distribution systems in the industrial sector
Electric center of an installation; MV distribution systems; LV distribution systems; types of distribution systems; LV switchboards; Connection of passive users to the public LV grid; Project Example
11. Electrical installations in residential environments
Introduction; Performance levels; Minimum power and equipment; Connection to the delivery point; Electrical panels; Project Example
12. Power supply and emergency lighting
Generality; Regulatory requirements; UPSs; Emergency lighting
13. Special environments and applications
Introduction; Rooms containing bathrooms or showers; Swimming pools and fountains; Building sites; Restrictive conductive locations; Camping areas; Marinas; Medical premises; Environments at increased risk of fire; Places with danger of explosion; Examples of Projects
14. Advanced applications
Grounding Analysis 3D; BIM and Integrator Software; Examples
15. Power Systems Design laboratory
Tools and software for power systems design; Integrated design tools and software
16. Electrical checks
Generality; Visual examinations; Measurements and tests; initial and periodic checks
17. Maintenance and electrical work
Maintenance obligation; Types; Documentation; Procedures; General information on electrical works; Types; Security measures; Examples
18. Dependability of electrical systems
Dependability principles; Simple reliability applications and models; Reliability analysis of complex network configurations; Standard for the study, management and application of the concepts of dependability to electrical systems.

Gaetano Conte, “Manuale di impianti elettrici. Progettazione, realizzazione e verifica delle installazioni elettriche in conformità con le norme tecniche e di legge.”, Ed. Hoepli, 2014
“Norma CEI 64-8 per impianti elettrici utilizzatori: criteri di applicabilità, prescrizioni di progettazione ed esecuzione, Decreto Ministeriale 22 gennaio 2008, n. 37 \”, Ed. CEI, Comitato elettrotecnico italiano
“Norma CEI 0-2: Guida per la definizione della documentazione di progetto degli impianti elettrici”, Ed. CEI, Comitato elettrotecnico italiano
AA.VV. “Documentazione di progetto degli impianti elettrici”, Ed. TNE, 2017
Pietro Vezzani, “Elementi di Progettazione ELettrica”, Ed. TNE, 2002
Ali A. Chowdhury, Don O. Koval, “Power Distribution System Reliability”, Ed. Wiley, 2009

Italian

Oral lessons. Workshops. Teaching labs. Technical visits.
Any changes to the methods described here, which are necessary to ensure the application of the safety protocols related to the COVID19 emergency, will be communicated on the Department, Study Program and teaching website.

Compulsory attendance of some specific educational activities (workshops, seminars, interactive exercises, etc.) is expected.

Presentation of the design of an electrical power system assigned by the lecturer and performed during the teaching labs.
Oral examination with theory questions, discussion of complex problems, and cases of study. During the examination, the knowledge about the overall course program will be evaluated through an appropriated number of questions.

icona 7 icona  9