Electrical power systems and high voltage technic

• 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 power-flow calculations.

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.
• 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 for laboratory work.
• be able to perform laboratory work.
• 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.

Web-based learning

There is no mandatory work, only recommendations as simulations and recommended tasks and exercises.