Course code FYS377

FYS377 Electrical Power Systems

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Norsk emneinformasjon

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Showing course contents for the educational year 2015 - 2016 .

Course responsible: Petter Hieronymus Heyerdahl, Petter Hieronymus Heyerdahl
Teachers: Kjetil Ryen, Sonja Monica Berlijn
ECTS credits: 10
Faculty: Department of Mathematical Sciences and Technology
Teaching language: NO
(NO=norsk, EN=Engelsk)
Teaching exam periods:
Autumn parallell
Course frequency: Annually
First time: 2014H
Preferential right:
Course contents:

The International Energy Agency, IEA, expects a doubling in use of electrical energy by 2035. During this century, we will need to reduce the use of fossile carbon as our most important energy bearer. Electricity will take over most of that role. We shall go from carbon to electron. A larger part of electricity will be generated in distributed local systems such as solar cells, wind turbines, small hydropower stations, fuel cells, Stirling motors, wave power, etc. These sources shall be operated independently in small micronetworks or in conjunction with the centralized power grids. 

Well-working electric power and energy transmission will be key to ensure reliable transmission of electric energy and power with high quality in the transition to a sustainable society. The course will give you a deeper understanding of power grids with respect to the choice of voltage levels, transformers, measuring systems, transmission lines and cables, AC vs DC, safety and protection. The course will also touch upon automatic metering systems (AMS), the beginning of the integration of energy and IT.

Learning outcome:
Basic understanding of the flow of active and  reactive power in power transmission systems. Safety systems.
Learning activities:

Lectures 13 weeks, 2 x 2 hours per week. Exercise sessions by agreement with the teacher.

1-2 excursions to e.g. transformer stations, operating centrals for energy supply.

Teaching support:
Fronter, lecture notes, papers and chapter from textbooks. Literature will be announced at the beginning of the course.

Introduction to power transmision lines and systems. Basics on power markets. 

Voltage levels, tranmsmission and distribution grids. 

Radial, meshed and ring grids.

Power lines and cables and their properties. Design.

Earthing and grounding. Personel safety.

Over head (OH) lines, pylons, fundaments, insulators (Planning, design, construction).

Insulation and insulation coordination. Voltage upgrading.

Kraftledninger og miljø (kamuflasje, elektrisk felt, magnetfelt og støy)

Overhead lines and the environment. Electromagnetic fields and noise.

Underground cables.

Maintenance and diagnostics.

Quality systems, certification and quality audits.

Transformers and low frequency models.

Failure analysis.

N-1 criteria, N-0, N-2, islanding and protection against islanding.

Protection relaying, types and zones, transformers and power lines. Differential and impedance, current-time curves.

Symmetrical components, theory and examples. 

Simpified shor circuit calculations with symmetrical components, modelling. One, two and three phase short circuits with and withouth earth connection. 

Grid components: Circuit breaker, disconnecter, load switch, insrtrument transformers.

Braking of curents in circuit breakers, ionization, transient recovery voltage.

System earthing techinices. Earht extinguishing coils ("Petersen coils"), isolated  and solidly grounded. Consequenses for design and operation.

Basic physics, FYS102, FYS230
Recommended prerequisites:
3,5 h written
Nominal workload:
300 hours
Entrance requirements:
Type of course:
Lectures: 13 weeks à 2x2 hours = 52 hours + exercises with the teacher by appointment
The external and internal examiner jointly prepare the exam questions and the correction manual. The external examiner reviews the internal examiner's examination results by correcting a random sample of candidate¿s exams as a calibration according to the Department's guidelines for examination markings.
Allowed examination aids: Calculator handed out, other aids as specified
Examination details: One written exam: A - E / Ikke bestått