On the basis of
The course builds on "Basis, three phase / machines and transformer" taught at Karlstad University
Expected learning outcomes
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
- 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
be able to discuss society issues due to electric power delivery.
Calculations of design criterias for highvoltage insulation
Calculations of the electric field strength in various configurations
Calculations of Lightning overvoltages and Switching 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
-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
Net Support Learning
Teaching Methods (additional text)
The 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.
Form(s) of Assessment
Written exam, 5 hours
Alphabetical Scale, A(best) – F (fail)
Graded by internal examiner. External examiner is used periodically every four years. Next time in the academic year 2016/2017.
Re-sit August 2016
C: Specified printed and hand-written support material is allowed. A specific basic calculator is allowed.
Approved formula sheets will be attached to the exam
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 7 compulsory exercises of which 4 are in the high-voltage section and 3 are in the electrical installation section.
Information about the teaching materials is given at the start of the course.
The course is part of a collaboration between the the three institutions HiG, HiØ and Karlstad University (KU) in the field of high voltage engineering. HiG is responsible for this topic for all three institutions.