64 uppsatser · sida 1 av 5
Bidraget till minskade förluster
… from the early electrification of the Swedish railroads has resulted in a power grid with a lower grid frequency than the national power grid from which it is fed. Energy transfer between these power grids with different frequencies requires substations, adapting the grid …
Wind power is expanding rapidly in Sweden. Increasing amounts of wind power sets higher requirements on balancing power and grid expansions and would affect the whole Swedish electricity system. The aim of this report is to examine the factors affecting the wind power expansion …
En förstudie och konsekvensutredning över förutsättningarna för ökade vandringsmöjligheter med nya fiskvägar.
The hydropower from Nissan River is of national interest and produces annually 230 GWh from the twelve power stations in the main flow. For modified waters a consideration between the power production and the biological values has to be made. This reports serves as a pre-study …
Identifiering av för- och nackdelar med nätstationsmätning, Mälarenergi Elnät AB
… of the low voltage network losses, identify and address issues such as illegal power dissipation, unmeasured power outtakes, and unsatisfied technical documentation for the substations low voltage network. During 2012, Mälarenergi Elnät AB had a total electrical network loss …
… detailed description of how the frequency regulation isperformed in the Nordic power system.The simulations are performed using the analysis program Power System Simulator forEngineering (PSS/E). The Nordic32 power system is used for the simulations, this is asystem with 32 …
… but the diesel motor has been replaced with two electrical hub-motors with a power of 145 kW each that are powered by batteries. The batteries are charged at the end station after each route. In case the batteries should run low on capacity during driving, they can be recharged …
Concept Study of a Combined Emergency Generator-Garden tool
… Magnuson, associate professor, had when a heavy storm caused a widespread power failure of long duration. With a basic power-producing unit one should be able to get through a power loss. The product could also be useful for other tasks if different modules are connected, e g …
Rekommenderade avsteg från IEC 60076 för att vid upphandling beskriva en robust enhet
… is to investigate if deviations should be made from the standard IEC 60076 ? Power Transformers in order to describe a robust large power transformer for procurement. The investigation has been conducted in three stages. In the first stage a definition of the term robust was …
passage fates at a reservoir, a power house and a bypass structure
A large number of rivers in northern Sweden have hydropower developments that cause negative effects on both up- and downstream migrations of anadromous species like Atlantic salmon. So far, most attention has focused on the hindrances of adult fish during their upstream …
… of today is dependent of secure transports and deliveries of electrical power. Interruptions in different activities because of fallen trees cost a great deal of money in form of reparations and claimed damages for transport companies and electrical suppliers. Fallen trees along …
En studie av två verkliga byggnader
… in a higher energy use for more of the year. The energy loss, in fact a power, is proportional to the difference in temperature between indoor and outdoor climate. The bigger building gets rid of the energy loss between the balance temperatures of the buildings when comparing a …
… in the PEN conductor between the origin of the electrical installation and the power transformer. Based on the theoretical analyzes of possible faults, it is considered that the requirement for supplementary equipotential bonding systems for bathrooms in most cases can be …
… signs to communicate. Things can be a link to what has been lost. They have a power to visualize emotions and communicate to yourself and others when words are hard to find. In a situation of loss new rituals can be formed and be of help in accepting of what has happened. Thus …
… was analyzed using radio telemetry. The salmon were caught at Forshaga power plant, radio-tagged and returned to Klarälven at Ekshärad, 107 km from the river’s mouth. Permanent stations with antennas were deployed at seven different locations along the river, to register all …
… to enhance earnings in a short term but also in a longer perspective. Volvo Powertrain Production Köping has an overall goal; to reduce costs by nine percentages in three years. To achieve the goal, Volvo Powertrain Production Köping works with World Class Manufacturing where …
