AERONAUTICAL ELECTRICAL SYSTEMS

Course objectives

- Be able to manage the problems of electrical systems in the aeronautical fields. In particular, being able to communicate with electrical system specialists both highlighting the particular needs in the use of electrical energy in the aeronautical field and being able to adequately evaluate the solutions proposed by the specialists themselves; - Know the main problems of the correct sizing of an electrical system, with understanding: of the correct method of analysis of the useful effects that can be produced with appliances that use electricity, of the physical laws underlying the sizing calculations, of all the constraints for an electrical system that must be simultaneously satisfied; - Extrapolate from the sizing procedure studied a general methodology of analysis of new problems, with identification of the final objectives and of all the system constraints that can be found; - Be able to verify the correct schematization of the problem and critically analyze the sizing results of the system to have evidence of compliance: with the functional needs of electrical utilities and power sources, and with the requirements of correct behavior in the event of a fault; - Acquire adequate knowledge: of the terminology used in the electrical plant engineering sector, and of the best way of representing the specialized needs of electrical systems for the aeronautical sector; - Be able to transfer the learned procedures of analysis and subsequent sizing, based more on the understanding of basic physical phenomena than on the knowledge of standardized solutions, in case of updating of both system and component technologies.

Channel 1
MARCO MACCIONI Lecturers' profile

Program - Frequency - Exams

Course program
Introduction, objectives and organization of the course Load analysis Power analysis Sizing of power sources (AC generators and transformers) Emergency power supply UPS and Generator Sets Short circuit impedance representation in P.U. Calculation of short circuit current with P.U. method Line cross section calculation for voltage drop Thermal cross section calculation Cross section calculation for short circuit withstand Fault protection system requirements Magnetic relay, thermal relay, magneto-thermic combination Voltage relay, directional, line differential - CT and VT Selectivity Electric arc interruption in alternating and direct current Fuses and extreme breaking capacity breakers Special features of protection systems in the presence of UPS and Generator Sets MV line protection with radial connection between MV/LV substations MV line ring protection Logic selectivity protection of MV switchgear busbar Functional schemes MV ring logic selectivity protection Selective protection of parallel transformers Electrocution Protection from direct contact Grounding Systems Protection from indirect contacts Lightning Lightning protection Examples of faults and protection trip Summary exercise, load analysis, circuit sizing and protection coordination Airside and groundside airport systems Special systems in intermodal area Possible architectures of airport systems distribution networks Navigational aids systems Installations for radio-electric navigational aid equipment supply Aeronautical ground lighting Normalized geometries of ground lighting aids Ground lighting aids management - SMGCS and ASMGCS Ground lighting aids for TW and Apron Series circuits for lighting aids Calculation of series circuits Examples of airport facilities Lighting aids with LED sources Luggage system Introduction of electrical system for commercial aircraft Electricity generation on board Special features frequency at 400Hz - Synchronous generator - CSD and IDG Example: IDG 767 - Brushless structure Power source management: main generator, APU, TRU and battery On-board electrical systems example diagrams Electric system components: switches, relays, contactors, cables and junctions (laboratory) Components for airport lighting aid systems (laboratory)
Prerequisites
Knowing the basic laws of electrical engineering; Knowing the methods of analysis and representation of direct current circuits; Knowing the methods of analysis in alternating current of both single-phase and three-phase circuits; Knowing the basic characteristics of electrical machines, motors and generators, both in direct and alternating current.
Books
Power-point documents , articles , data sheets , airport regulations , provided by the teacher in the first lessons as PDF documents on a CD.
Frequency
Face-to-face classroom lessons according to the faculty calendar
Exam mode
The valuation is based on an oral exam typically divided into three questions. The student's answers must show the following learning outcomes: - Knowledge of the topic with correct framework with respect to the aspects most linked by system constraints. - Full understanding of the physical laws that are applicable in the particular case.
Lesson mode
The lessons are based on an iterative process that develops in the following phases. We present the topic that will be treated by highlighting the system's links with the other topics already analysed or that will follow. The physical bases are highlighted by highlighting the difference in schematization three a purely electrotechnical analysis and power system sizing. The typical formulations of literature are presented, and when possible the presented formulations are used by carrying out simple example calculations to show their operations. At this point, students are invited to ask questions, possibly stimulating attention on aspects known for their greater difficulty of full immediate understanding. With the next topic, the system problems are presented, returning to the concept that the individual problems analysed will then have to be managed together by optimizing the choices and sizing. With this process the individual topics are analysed and at the same time a critical evaluation approach is provided that helps the full understanding of the main problems encountered in the design of an electrical system. The aeronautical area is therefore used not only as an objective of knowledge of its particularities but also as an example of the highest quality and performance requirement for an electrical system. In this teaching process, the calculation process develops in two ways. A tool to help understand the particular problems with individual applications of the formulas just analysed. Summary exercises where not only all possible formulations are applied but also above all the systemic aspect intrinsic to the sizing process is highlighted.
TOMMASO BRAGATTO Lecturers' profile

Program - Frequency - Exams

Course program
Introduction, objectives and organization of the course Load analysis Power analysis Sizing of power sources Emergency power supply UPS and Generator Sets Short circuit impedance representation in P.U. Calculation of short circuit current with P.U. method Line cross section calculation for voltage drop Thermal cross section calculation Cross section calculation for short circuit withstand Fault protection system requirements Magnetic relay, thermal relay, magneto-thermic combination Voltage relay, directional, line differential - CT and VT Selectivity Electric arc interruption in alternating and direct current Fuses and extreme breaking capacity breakers Special features of protection systems in the presence of UPS and Generator Sets MV line protection with radial connection between MV/LV substations MV line ring protection Logic selectivity protection of MV switchgear busbar Functional schemes MV ring logic selectivity protection Selective protection of parallel transformers Electrocution Protection from direct contact Grounding Systems Protection from indirect contacts Lightning Lightning protection Examples of faults and protection trip Summary exercise, load analysis, circuit sizing and protection coordination Airside and groundside airport systems Special systems in intermodal area Possible architectures of airport systems distribution networks Navigational aids systems Installations for radio-electric navigational aid equipment supply Aeronautical ground lighting Normalized geometries of ground lighting aids Ground lighting aids management - SMGCS and ASMGCS Ground lighting aids for TW and Apron Series circuits for lighting aids Calculation of series circuits Examples of airport facilities Lighting aids with LED sources Luggage system Introduction of electrical system for commercial aircraft Electricity generation on board Special features frequency at 400Hz - Synchronous generator - CSD and IDG Example: IDG 767 - Brushless structure Power source management: main generator, APU, TRU and battery On-board electrical systems example diagrams Electric system components: switches, relays, contactors, cables and junctions (laboratory) Components for airport lighting aid systems (laboratory)
Prerequisites
Know the basic laws of electrical engineering; Know the methods of analysis and representation of direct current circuits; Know the methods of analysis in alternating current of both single-phase and three-phase circuits; Know the basic characteristics of electrical machines, motors and generators, both in direct and alternating current.
Books
Power-point documents , articles , data sheets , airport regulations , provided by the teacher in the first lessons as PDF documents on a CD .
Frequency
face-to-face classroom lessons according to the faculty calendar
Exam mode
The valuation is based on an oral exam typically divided into three questions. The student's answers must show the following learning outcomes. Knowledge of the topic with correct framework with respect to the aspects most linked by system constraints. Demonstrate full understanding of the physical laws that are applicable in the particular case.
Lesson mode
The lessons are based on an iterative process that develops in the following phases. We present the topic that will be treated by highlighting the system's links with the other topics already analysed or that will follow. The physical bases are highlighted by highlighting the difference in schematization three a purely electrotechnical analysis and power system sizing. The typical formulations of literature are presented, and when possible the presented formulations are used by carrying out simple example calculations to show their operations. At this point, students are invited to ask questions, possibly stimulating attention on aspects known for their greater difficulty of full immediate understanding. With the next topic, the system problems are presented, returning to the concept that the individual problems analysed will then have to be managed together by optimizing the choices and sizing. With this process the individual topics are analysed and at the same time a critical evaluation approach is provided that helps the full understanding of the main problems encountered in the design of an electrical system. The aeronautical area is therefore used not only as an objective of knowledge of its particularities but also as an example of the highest quality and performance requirement for an electrical system. In this teaching process, the calculation process develops in two ways. A tool to help understand the particular problems with individual applications of the formulas just analysed. Summary exercises where not only all possible formulations are applied but also above all the systemic aspect intrinsic to the sizing process is highlighted.
  • Lesson code1021806
  • Academic year2025/2026
  • CourseAeronautical engineering
  • CurriculumGestione ed operazioni nell'aviazione civile e sistemi di volo
  • Year2nd year
  • Semester1st semester
  • SSDING-IND/33
  • CFU6