Grid codes are becoming more demanding on power generating units due to the factthat the complexity of the power grid is increasing. The penetration of wind powerhas grown over the last years and it is clear that wind farms need to be addressedwith the same type of grid codes as conventional generation units. There is howeveran undeniable difference between the technology in conventional synchronousgeneration units, and the asynchronous generation units in wind farms.This thesis has reviewed the current grid code in Sweden and compared it to the newcode proposed by ENTSO-E, ?the Requirements for Generators?, in the aspect ofwind farms with an installed power of 30 MW or more. The comparison has beencomplemented by an analysis of how wind farms of two different technologies(Doubly fed induction generators and full power converters) can meet therequirements and technical proposals have been given on how to be able to meetcompliance with the new grid codes.The Requirements for Generators contains many non-exhaustive and optionalrequirements, because of this it has been difficult to, at this stage, exactly point outthe technical impact on the grid connection of future wind farms in Sweden.

Jämtkraft AB which is a power production company in Sweden has bought two newhydro power units to their station in Hissmofors. The two new generators are using aconcept with sliding stator feet to handle the thermal expansion.The concept with sliding stator feet on hydro electric generators has not beenworking satisfactory on many hydro power stations in Sweden and has caused a lot ofcosts due to long downtimes.The new station in Hissmofors is very important for Jämtkraft AB, and therefore theywant to know how to make sure that the sliding stator feet are working as theyshould. According to theories and a simplified model of the generator the stator feetdisplacement should be around 1 -1,6 mm.The generators are delivered with a surveillance system that will measure thedisplacement of the sliding stator feet. The signal from the system isn?t accessible forJämtkraft AB but it will alarm when the sliding stator feet are malfunctioning.To secure the function of the sliding feet a logger for the surveillance system or adifferent measurement system must be used; if both systems are used Jämtkraft cansecure the function of the surveillance system..

At the Division of Electricity at UppsalaUniversitythere are ongoing researches, including a research concerning turbo generators.Turbo generators produce a large share of electricity in the world; however they are costly mainly due to the fact that the cooling and ventilation that are needed to eliminate the excess heat from the generators are expensive. Turbo generators work with high efficiency and in this project, the main task is to simulate a generator while taking into account that the generator must be designed against self-oscillation, centrifugal force, exhaustion and heat. The turbo generator must be simulated without being too expensive and complicated.In this project, the dimensions of the turbo generator depend on the efficiency of it, and where the losses are in the generator. Furthermore, the optimum values need to be chosen with the help of the ACE simulation program. The report begins with an introduction describing the project followed by a task description that is dealing with the project.

SammanfattningDatum: 18 januari 2013Nivå: Kandidatuppsats i företagsekonomi, 15 hpInstitution: Akademin för hållbar samhälls- och teknikutvecklingFörfattare: Simon Brodahl Pontus Eliasson David WahlbergTitel: Jag är organisationenHandledare: Johan GrinbergsNyckelord:Delaktighet, engagemang, delaktighet i beslutsfattande frågor, psykologiskt ägandeskap, anställdas välbefinnande och kunskapsspridning.Frågeställning:- Finns det ett gemensamt synsätt på delaktighet och engagemang inom ABB Motors & Generators?- Vad kan göras för att öka delaktigheten och engagemanget inom produktionsdelen och vad kommer detta leda till?- Vad bör ABB: Motors & Generators ha i åtanke vid applicerandet av delaktighet inom produktionsdelen i framtiden?Syfte: Syftet är att utifrån teoretiska referenspunkter analysera ABB:s verksamhet ur ett engagemangs- och delaktighetsperspektiv som ligger till grund för en analytisk diskussion vilken utmynnar i förbättringsförslag.Metod: Den teoretiska referensramen är konstruerad med hjälp av vetenskapliga artiklar och litteratur som behandlar ämnet engagemang och delaktighet. Det empiriska materialet består av en kvalitativ studie bestående av tre djupintervjuer.Slutsats: ABB Motors & Generators innehar ett tankesätt som behövs för att främja ökad delaktighet och engagemang hos de anställda. För att öka medarbetarnas engagemang till organisationen, krävs det att kommunikationen är bra mellan de olika funktionerna. Det är även viktigt att produktionsdelen känner förtroende för ledningen samtidigt som ledningen ger medarbetarna bekräftelse.

Jämtkraft AB has recently modernized its hydropower station at Hissmofors by replacing four older worn out units with two new units. The generators uses a concept with sliding stator feet to deal with the thermal movements that occur in the stator during operation when the unit is operating intermittently. At other sites, this method revealed shortcomings in the reliability. This has made Jämtkraft AB feel uncertainty about its function and therefore want to investigate it during an early stage. The generators have a built-in monitoring system for the sliding stator feet and by using data from there the function of the sliding stator feet has been investigated. The study focused on how the different stator feet move relative to each other and how the eccentricity and deviation from roundness changed during operation. The results show that there are several indications that the function of the sliding stator feet is not satisfactory.

Vattenfall and Svenska Kraftnät perform start-up tests, where hydropower generators are used to power up the electrical grid in case of a blackout. To monitor the electrical grid, Phasor Measurement Units (PMU) are used. Each PMU is individually equipped with a GPS-receiver to precisely timestamp the data relative to the official time UTC. During the test, it is also of interest to timestamp the measurement signals from individual hydropower generators to later compare with PMU-data, and thus study the power grids impact on the generator. The aim is to work out an appropriate method to make these measurements and to build a data acquisition system, capable of timestamp data relative to UTC, from a generator in one of Vattenfalls hydroelectric power stations. The problem is that the generator is located in an underground station which hampers the reception of GPS-signals and wiring should be avoided if possible. Time synchronization has been solved by using Vattenfalls network, which is synchronized by the network protocol NTP.

Our aim with this thesis was to closer study business intelligence to be able to present an overview of both the concept and the phenomenon. We have also developed a framework that show how business intelligence can be used effectively. We think that our framework can be of help to under-stand the areas which constitutes the core of business intelligence. We think that the framework we have developed is a good basis for the im-plementation of business intelligence in an organisation and that it also can be of help in the daily business intelligence work..

In Uppsala CHP Plant, there are six pressure reducing valves to reduce the pressure from 15 to 3 bars, before six absorption heat pumps. During the process the energy is conserved but losses occur in form of exergy. The aim of this thesis is to reduce the losses of exergy. This can be done by letting turbines replace the pressure reducing valves.In this thesis an investigation has been done of the conditions today, the conditions after the change from pressure reducing valves to turbines and a comparison of three different types of turbine solutions. The three examined solutions are one turbine, several helical screw expanders and several small turbines in parallel with asynchronous generators.The six absorption heat pumps have been divided into two groups; one group of four and one group of two absorption heat pumps.

This examination paper is an account for the author?s work to arrange and registrate the business archive and business records of court jeweller W. A. Bolin AB from 1916 until present day, and a part of the one-year Masters Programme in Archival Science at the University of Uppsala. Problems that have been encountered are treated, as well as motivations of the decisions made during the process.

E-commerce is a conception who many are taking about nowadays. E-commerce is associate with computer based business and it?s a new way to do business on. Users and system connect up to each other for effective mediate and transfer information. Within e-commerce there?s a lot of ways to do business on and it can for example be between a business and a another business (B2B) or between business and consumer (B2C).In this degree report have I reached if small business will invest on e-commerce and if they will, how.

In order to reduce the price for, and improve the performance of automatic control systems for magnetization of synchronus generators, the possibilities of using a PC based software PLC system, Programmable Logic Controller, has been investigated. The result is a system based on the CoDeSys software PLC with runtime environment from 3S-Software, communicating with external units via Modbus fieldbus. System price is reduced from ?5000 to ?2000 and system processing speed is reduced from 10 ms for a Siemens S7 PLC to 4 ms with the CoDeSys PLC system though unsolved problems with runtime seizure caused by improper settings in the PC BIOS..

The purpose with this essay is to enlighten the small business´ existence at times of expansion, identify threats and possibilities and also to try to find ways to encourage growth in the small business.To answer our purpose we carried out a literature study to later implement six interviews with small business leaders. We separated the companies into three categories; small business without employees, small business with 2-5 employees and small business with 6-10 employees.We confirm that the main reason why small business leaders think both once and twice before hireing new labour force are because of the high costs. The change in government has so far not given the small business what was promised, but there is still hope for improvement and simplification.The economic part of owning a company has been pointed out as the greatest threat in relation with expansion and the big responsibility in another persons possibilities to earn his/her living is also burdensome. The possibility to take on more work increases with the number of workers, which is positive..

I denna uppsats har vi beskrivit och analyserat befintlig traditionell ekonomistyrning hos små och medelstora svenska business-to-business tjänsteföretag och diskuterat förutsättningar för utformning och implementering av en modern verksamhetsstyrning. Undersökningen genomförts som en fallstudie av sex företag och presenteras med hjälp av en enklare modell, som återger företagets syn på strategier och ledningsfilosofi, organisationsstruktur samt ekonomistyrning.Vi har kommit till slutsats att storleken och tjänsteinriktningen är avgörande faktorer inom gruppen vid val av ekonomistyrningsmodell. Det förefaller så att företagen använder sig av den traditionella ekonomistyrningen, vilket ger ett stort utrymme för implementering av nya utvecklingslinjer. Avslutningsvis föreslår vi de moderniseringar, som skulle kunna leda till modern verksamhetsstyrning..

This thesis will guide you through the haunting Business marketing woods of snaring networks and ravel business relations in the dark landscapes of the mighty music publishing creatures. The task at hand (of this thesis) will be to present the secrets that lie beyond with the hopes that you, the daring reader, will gain knowledge and understanding of what these entities do, lurking in the shadows of the woods of business marketing (and of your unknowing mind). How they go head on with their partners in business to thrive on intangible properties and how they find their path through these woods. Explore and discover, if any, commonly found ways in the management of business marketing within the domain of the music publisher. We wish you a pleasant reading!.

Due to a globalised world business travel is flourishing. This paper examines how middle level executives, travelling a lot in their work at a multi-national company, feel about their travel. It looks for links between business travel and work satisfaction among them. A short presentation of the patterns of business travel and relevant motivational and stress theories is given. Data for the paper is collected using a survey (78 participants) and interviews.