System studies
In preparing new projects in the field of electric power systems, the basic procedure is to begin by setting up a computer model of the project to analyse load stress during maximal strain on the system as a whole or separate parts of it. The same applies when systems that are already in operation are analysed, e.g. if there is an operational problem in the present systems or if they are to be changed or extended. The function of the system can be simulated both in normal conditions and under strain in the worst case scenario. Verkís has a long experience in applying such system analysis and providing the associated consulting. Verkís possesses advanced software to use in these studies and has the knowledge and experience to apply them. The results have been used as presuppositions for designing devices in large and small projects and have proved successful. The calculations that Verkís expertise covers are e.g.:
- Load flow and strain on separate parts of the system
- Short circuit power
- Harmonics and other disturbances
- Earthing systems
- Protection systems
- Dynamics
Calculations have been applied in analysing various systems, including:
- Power plants – earth electrodes, generators, transformers, cables, large devices (pumps, fans etc.)
- Power plants – transient characteristics and the influence of changing water flow, frequency, voltage etc., taking into account the characteristics of waterways, gate equipment, generators, overhead transmission lines and users, governors and voltage regulators
- Substations and transmission systems – overhead lines and cables, switchgear, transformers and reactive compensation systems
- Industry – feeding from transmission systems, transformers, furnaces, large devices, harmonics, reactive compensation systems
- Municipal distribution systems – feeding from transmission systems, overhead lines, cables, transformers, large consumers
- Distribution systems in large buildings
Key projects:
- Kárahnjúkar HEP
- Krafla geothermal project
- Nesjavellir geothermal project
- Hellisheiði geothermal project
- Quorlotorsuaq HEP, Greenland
- Sisimiut HEP, Greenland
- Local distribution system in Fljótsdalsheiði
- Transmission system for Kárahnjúkar HEP
- Transmission system for Hellisheiði geothermal project
- Elkem Iceland FeSi smelter
- Distribution system in Hveragerði
- Distribution system in Selfoss
- Distribution system in Húsavík
- Distribution system in LSH Fossvogur, Landspítali university hospital