To measure losses in a transformer with today?s methods is either slow or insecure. There s a new method developed by Alstom that hasn't been actualize in to a test-system and that has been the assignment in this project. The idea is built on a switched system and a CLR- circuit in the resonant frequency. The test-system has a calculated power-loss that make the efficiency to be as high as 99,8% and in reality over 95%.

Background: It has been shown that EDI can yield positive effects within companies. Which effects are possible for a company to direct assign to the introduction of EDI and is it possible to estimate the total effect.Purpose: The purpose of this study is to estimate and analyze the effects of using EDI in electronic business. We also want to contribute with a model for measure and estimate the effects of EDI.Accomplishment: We have studied literature concering EDI and realized a preliminary studie in form of interviews with experts to establish deeper knowledge of EDI. We have also tried to estimate the effects obtained in companies in three different businesses, power, government and transport industry.Result: To obtain as good effects as possible it is important that the co- oporation is built on trust and engagement. Before implementing the EDI-system a thorough overhaul of the processes in the company should be done, involving both the top managers and the staff.

The purpose of the study is that based on focus groups with personal assistants understand how self-determination and participation, expresses itself in work with the users. The study has a focus on the concepts of power and help and social citizenship in the context of self-determination and participation. We are interested to explore how personal assistants reason and argue about different design cases and situations related to self-determination and participation in the relationship with the users. For this study we have used a qualitative method and to collect our data we have used focus groups and different design cases (vignettes). To analyze our data we used the theory about power and help and the theory about social citizenship.

We are heading towards a huge switch of how energy is produced with fossil fuels being replaced by renewable energy sources. It is not difficult to replace the energy you use in the house and there is no need for futuristic technology. There are already many established products on the market such as high efficiency vacuum solar collectors, heat pumps & small wind power stations that can supply the energy being used in a house. The company Sol & Energiteknik SE AB in Huskvarna has many different products which can reduce the need for an outside energy distributor. An average house in Sweden uses 15 000 kWh for heating, 5000 kWh for tap water and 5000 kWh for electricity.

Användandet av betong som ersättare för stål vid produktionen av vindkraftverkstorn har ökat den senaste tiden. Betongtorn är betydligt billigare än ståltorn men problem som sprickbildningar, frostsprängningar och följaktligen armeringskorrosion har uppstått bl a på grund av vibrationer från rotorn. I fundamentet i vindkraftverk kan ovan nämnda problem också uppstå och det uppfyller således inte alltid funktionskraven. Det här examensarbetet undersöker möjligheten att eliminera dessa problem genom att använda en sorts högpresterande betong kallad UHPC 2.2 med syntetfiberarmeringen, STRUX. Jämförelser mellan tidigare empiri om högpresterande betong och laborativa tester på UHPC 2.2 visar att den senare är beständigare och ger möjligheter till en större sprickfrihet.

In Sweden there are 1894 small-scale hydropower plants in operation, which together generate 4.3 TWh of electricity per year according to Swedish hydropower compound (SVKF, 2011). This corresponds to the annual consumption of about 860,000 Swedish households (based on an annual consumption of 5000 kWh). In the mid-1950s there were around 4000 small-scale hydropower plants in operation in Sweden before cheap fossil fuels and uranium competed with them, in the current situation only 1,894 of these are in use. If slumbering small hydropower plants once again would be taken into use and some new ones are built, we would be able to extract about 7 TWh of renewable electricity from these annually in Sweden, representing about 1.4 million households.The thesis intends to calculate and construct a hydroelectric power plant at the existing dam in Olofsfors and give suggestions on how the power station should run during the time that fish migration is greatest in Leduån.The turbine and generator to the station in Leduån at Olofsfors is designed by the height of the fall and the water flow through the dam. The turbine selected for the station is a CK-1000RM turbine with a 4-pole 250 kW generator from Cargo & power turbine Sweden AB, which is expected to deliver 1.2 GWh per year.

As break downs of production transformers are costly and often result in long outages it is essential for reliability of operation that the transformers are manufactured to be robust. The aim of this M.Sc. thesis 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 developed in consultation with the client Vattenfall Vattenkraft.

Denna rapport beskriver arbetet med utvecklingen av en ny modell för kaplanturbiner. Utvecklingen bygger på två kopplade differentialekvationer som under arbetets gång anpassats och implementerats i turbinmodellen.Modellen beskriver hur vattenflöde och turbinmoment påverkas av avvikelsen från den optimala kombineringskurvan för vinklarna på turbinens ledskena och löphjul, och är anpassad för ett referensaggregat med tillgängliga provdata. Även övriga enheter i vattenkraftaggregatet modelleras och sätts samman med frekvensregulator och elnät för att simulera aggregatets reglerstabilitet i önätsdrift.Verifieringen av turbinmodellen sker genom försök att återskapa de befintliga verkningsgradskurvorna med hjälp av modellen. Resultatet visar en god följning av de verkliga kurvformerna, dock med något lägre maximal verkningsgrad.Verifieringen av önätmodellen sker genom att prova stabiliteten i nätfrekvens och turbineffekt vid stegpålastningar. Resultatet ger en stabilare reglerstabilitet än i verkligheten, men uppfyller ändå förväntningarna på en fungerande modell.This report describes the development of a new kaplan turbine model.

During the last two years Gothenburg has become a central point in Sweden foractivists in the area of disability. The essay explores which strategies that activist usesin purpose to pay attention to and criticize the Normate. By doing so, five cripactivists have been interviewed about their experiences and feelings about how theymanage to stand up against different types of power relations. The activists describehow they develop different strategies to change their identity positions and takecontrol over themselves.The essay intends to contribute with a crip theoretic view in combination withmaterial feminisms and resistance theory. The conclusions of the essay shows that thenormate is incorporated in both social and material matter and how the activist?s usesthe strategy Critical Disability to negotiate their identity position.

One step towards a more sustainable energy system is to create a more flexible electrical grid, where increased demand response among electricity consumers can play an important role. A distribution grid owner can encourage their customers to use electricity more evenly distributed during the day by introducing different types of grid fees such as time-differentiated power tariffs. In this master thesis, the theoretical economic impact of a flattened load profile for a distribution grid owner is investigated. Different factors that impact the distribution grid owner?s economy are identified and two are chosen to be quantified; losses in the grid and the fee to the feeding grid.

Makt kan utspela sig på många olika sätt, i varje sammanhang inom varje rum finns någon form av makt. I min studie har jag valt att undersöka makten i mötet mellan ungdomar och polis, utifrån ungdomars berättelser. Ungdomar är vår framtid, det är våra framtida ledare och politiker, det är de som kommer att ta över världen efter oss, därför är det viktigt att vi tar hand om våra ungdomar och att vi skapar en ljus framtid för dem. För att våra ungdomar ska bli välartade måste vi undersöka förhållanden som påverkar dem och deras utveckling av jaget. Därför har jag valt att undersöka makten i mötet mellan dem och polisen då jag anser att mötet påverkar dem och deras framtid.

Purpose of this thesis is to study the impact of wind turbines on their surroundings. It also aims to analyze how the communication looks between the authorities, the planner and local residents prior to the establishment of wind turbines in Lännäs/Odensbacken in Örebro, where three wind turbines set up in a group.The results of this survey show that the participants experience themselves not as especially disturbed of the turbines in the form of large noise, shadows, and sleep disturbance indoors and outdoors. Participants felt that no change had taken place on the natural environment (52%) since the turbines became operational. It was 49% of participants had got no information about the establishment of Örebro Municipality, Örebro County Administrative Board or Wind Power Company. Scientists/­experts had the highest confidence of 86%, politicians and the media/journalists had least confidence.

The purpose of this study is the reports of Peak Oil in Swedish newspapers. In otherwords, how do the news portray or describe the concept and what sources are usedwhen writing articles. With this in mind, I have studied eight published articles in threeSwedish newspapers, Dagens Nyheter, Dagens Industri and Svenska Dagbladet. To studythese articles I've used a qualitative content analysis, as a method, or more specific aCritical Discourse Analysis (CDA). This method was chosen due to it's tools to examinethe text itself and to reveal the structures, unconscious meaning and power of words.Further more I have used theories as agenda-setting (including framing and priming),ideology and newsworthiness to complement the study.The result from the content analysis shows two evident ideologies, one with aneconomic perspective and the other with an environment perspective ? with resourcelimitation in mind.

The electrical grid needs to be changed in the future in order to manage more distributed and renewable generation and also to make it possible for electricity consumers to be more active and aware of their electricity consumption. This future grid is usually referred to as a smart grid. With the transition to a smart grid, new challenges occur. One method to determine those challenges is to perform risk and vulnerability analyses. InStockholm, the new urban district Stockholm Royal Seaport is built.

The purpose of this paper has been to examine the heavy metal band Sabatons use of history and to relate it to societal trends in today?s Sweden. I have examined Sabatons music, album covers and music videos in order to define a certain use of history. To do this I have used a use of history theory and a heavy metal theory. My results showed that some of Sabatons use of history could be defined as commercial and that the societal trends in today`s Sweden have in some cases affected the selection and presentation of events and characters that`s been portrayed by Sabaton.