Examination arrangement

Course content

Calculations of design criterias for highvoltage insulation

Calculations of the electric field strength in various configurations
Calculations of Lightning overvoltages and Switching Overvoltages and knowledge about protection against these overvoltages.
Knowledge of the structure of the components of:
-Distribution networks with distribution network station
-Regional grid with transformer station
-Main Grid with switchgear

Modeling of overhead lines

Calculations of:
-Inductors for overhead lines
- Capacitances of overhead lines and cables
- Voltage and power loss in the wires
- Phase Compensation
- radial networks using per.unit calculations
Be able to establish node-matrixes for calculating currents and voltages in a meshed network

Learning outcome

After completing the course the student is meant to have:
- the theoretical basis for calculating voltage stresses in electrical high voltage grid.
- the theoretical basis for calculating voltage drop and losses in power grids.
- the theoretical basis for designing measures to reduce voltage drop and network losses.
After the course the students should have knowledge about:
- infrastructure, voltage levels and use of components and equipment for high voltage transmission and distribution in Norway and Sweden
- material properties that are important for electrical stress of high voltage insulation and the most widely used insulation materials
- simplified theoretical models for calculating estimates of stresses of electrical equipment during normal operation, temporary overvoltages, atmospheric surges and switching surges in the grid.
- simplified calculation of circuit parameters like resistance, inductance and capacitance for use in single-phase line models.
- application of different line models due to the length of power lines.
- application of models for transformers voltage fall and loss calculations.
- the principles of load flow calculations in meshed networks.
- what is meant by Norton_Raphson iteration and the priciples of how this is used in load flow calculations
Skills:
- be able to learn and comply with the safety instructions in a simple high-voltage laboratory.
- be able to perform simple flashover tests on highvoltage isolation.
- communicate laboratory work in a technical report on a verifiable manner.
- calculate the voltage drop and losses in radial networks.
- calculate phase compensation to improve voltage drop and network losses.
- apply per unit model when calculating voltage drop and network losses.
- establish node-matrixes of meshed grids and apply Thevenin and Norton models
General competence:
be able to discuss society issues due to electric power delivery.

Learning methods and activities

Lab.øvelser|Nettbasert Læring|Nettstøttet læring|Obligatoriske oppgaver|Prosjektarbeid|Samling(er)/seminar(er)

Utfyllende informasjon:

Lectures

Laboratory work

E-learning

Net Supported Learning
Obligatoric exercisesProject work.Gatherings/seminarsProject workGatheringsThe course is taught simultaneously to students at HiG, HiØ and KaU and students attending the flexible program at HiG. Most lectures will therefore be online.

Obligatoriske arbeidskrav:

At least 3 laboratory assignments shall be done, and there is a requirement that a report shall be written based on one of these assignments.The students must submit at least 3 compulsory sets of exercises in the high-voltage section and perform a project work in the electrical power system section.

Compulsory assignments

• Oligatoriske arbeidskrav

Further on evaluation

Utfyllende om kontinuasjon:

Ordinary

Vurderingsformer:

Writeen exam, 5 hours

Specific conditions

Recommended previous knowledge

The course builds on "Basis, three phase / machines and transformer" taught at Karlstad University

Required previous knowledge

From autumn 2017:It is required that ELE 1071 Elektriske kretser is passed in order for NTNU students to start on the course.An equivalent/similar course at other universities/colleges than NTNU must be passed in order to start in the course.

Course materials

Information about the teaching materials is given at the start of the course.