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8597 Uppsatser om Power quality problems - Sida 47 av 574
Anläggningsmätning med moderna metoder. Från projektering till färdig anläggning
On a request from the water sewage plant Gryaab in Gothenburg a power quality survey was performed. The voltages and currents have continuously been sampled in the incoming 10 kV substation HSP01 from April-August 2008. Power quality measurements were also performed in Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of the induction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps to the plant. The reason for the latter measurement was due to registered negative transients each time the motor was connected to the grid. The cause of the transients could be explained by the coupling in the substation, the ageing of the motor which could result in damage of the bearings or resonance in the motor circuit which amplifies high frequency harmonics.
Den kollektiva missuppfattningen. En studie om missuppfattningar om färdmedelsalternativen bil och kollektivtrafik, för boende i Hjuvik
On a request from the water sewage plant Gryaab in Gothenburg a power quality survey was performed. The voltages and currents have continuously been sampled in the incoming 10 kV substation HSP01 from April-August 2008. Power quality measurements were also performed in Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of the induction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps to the plant. The reason for the latter measurement was due to registered negative transients each time the motor was connected to the grid. The cause of the transients could be explained by the coupling in the substation, the ageing of the motor which could result in damage of the bearings or resonance in the motor circuit which amplifies high frequency harmonics.
Passivhusteknik i ett svenskt klimat - en byggnadsfysikalisk riskinventering och erfarenhetssammanställning av befintliga passivhusprojekt
On a request from the water sewage plant Gryaab in Gothenburg a power quality survey was performed. The voltages and currents have continuously been sampled in the incoming 10 kV substation HSP01 from April-August 2008. Power quality measurements were also performed in Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of the induction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps to the plant. The reason for the latter measurement was due to registered negative transients each time the motor was connected to the grid. The cause of the transients could be explained by the coupling in the substation, the ageing of the motor which could result in damage of the bearings or resonance in the motor circuit which amplifies high frequency harmonics.
Kartering av föroreningskällor i urbana avrinningsområden
On a request from the water sewage plant Gryaab in Gothenburg a power quality survey wasperformed. The voltages and currents have continuously been sampled in the incoming 10 kVsubstation HSP01 from April-August 2008. Power quality measurements were also performedin Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of theinduction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps tothe plant. The reason for the latter measurement was due to registered negative transients eachtime the motor was connected to the grid. The cause of the transients could be explained by thecoupling in the substation, the ageing of the motor which could result in damage of thebearings or resonance in the motor circuit which amplifies high frequency harmonics.
Timmerkvalitet hos björk i blandskog med gran
Birch is the dominant deciduous tree species in Sweden but only 16 % is found in pure birch stands. The majority of the birch (51 %) is to be found in conifer dominated stands. Swedish forest land comprises approximately of 23 % mixed stands and one problem is that for mixed stands there are few management recommendations. The underlying aim of this thesis was to study the management of mixed forest stands of spruce and birch to achieve good timber quality of birch. The study was based on a literature study and measurement in a field experiment launched in 1998 by the Swedish University of Agricultural Sciences (SLU).
Det handlar om tur: en kvalitativ studie av rättsprocessen vid kvinnofridsbrott
The purpose of this essay was to examine the experience of the judicial process concerning domestic violence from the perspectives of abused females and from some of the authorities and organisations which meet these women. The essay investigated several views of the judicial process in order to obtain a wide perspective. It responded to the following questions:- How are abused women treated by the authorities and organisations?- Are there enough resources and knowledge among the authorities and organisations?- Is there any collaboration between the authorities and organisations which the female meets in the judicial process and if so, how does it look like?- What does the aspect of security of person look like for the women which have been exposed to domestic violence?- What in the judicial process is important for the women's ability to move on in her life after experiences of violence in a relationship?This study was based on a qualitative method, where the interviews constituted of empirical material. The essay was based on interviews with two females who have experiences of violence in a relationship, two social workers from Kvinnojouren in Lund, two social workers from Kriscentrum in Lund, one lawyer, one prosecutor, one policeman and one social worker from Kvinnoforum in Lund.
Risk eller Resurs: En studie av hur riskbegreppet konstrueras i den svenska kärnkraftsdebatten
Looking at the debate on nuclear power in Sweden, the issue of risk is central to understanding the difficulties in resolving differences between proponents and opponents. I sought to answer the research question: "how is the concept of risk constructed in the nuclear power debate in Sweden?" Four main aspects of risk construction were defined and investigated to identify differences between sides in the debate. Through a qualitative study of the debate and its actors I found clear differences in respect to all four aspects of risk construction. First, the perception of nuclear power as a "normal risk" is common among nuclear opponents in contrast to a largely probabilistic view among proponents.
Universitetsstudenters kostvanor : En tvärsnittsstudie om en grupp universitetstudenters upplevda kostvanor och kunskap i ämnet samt hur de upplever hälsotrenden.
Background:Studies show that when nurses are experiencing problems in the care of non-Swedish speaking patients, it is often due to obstacles in the communication. Studies also show that a prerequisite for adequate care is that there is a basis for a direct communication. Nurses perceive interpreters as an important link to the patient when they do not share a mutual language, the nurses perceive interpreters as a bridge in the conversation.Aim:The purpose of the study is to describe nurses' experiences of the quality of assessments done with the help of an interpreter.Method:The study was conducted through interviews with ten nurses, working at psychiatric clinics. Qualitative content analysis was used for the analysis, which resulted in five categories.Results:The analysis resulted in one theme: "it´s the interpreter who tells me and have not the feeling that the patient has" and five categories: "shades of the language", "conversation structure", "the interpreter's competence", "interpreting implementing" and "the interpreter's gender and origin". The nurses experience working with interpreters as a challenge.
Den Segrörliga Utbildningen : Lärarutbildningens kvalitet vid Växjö Universitet
This work is a quick look at the overall quality of the teaching program at Växjö University and how the program is viewed by the students, future teachers, who attend it. This work aims to deduce how Växjö University uses it's resources to improve the overall quality of the teaching program..
Sjuksköterskors och läkares delaktighet i kvalitetsutveckling : En fallstudie vid Karlskoga lasarett
The purpose of this master's degree thesis was to develop an understanding of how hospital management, in the case studied, worked to achieve changes in an organization influenced by differing professional cultures. To gain insight into the conditions that may have contributed to nurses and physicians developing appropriate attitudes and behaviours, which may have affected the organization's ability to achieve the Swedish Quality Award 2012. A qualitative single case study was conducted at Karlskoga Hospital, with focus groups as well as individual depth interviews. The results of the case study showed the following conditions provided nurses and physicians the potential to develop appropriate attitudes and behaviours, which may have influenced the hospitals ability to achieve the Swedish Quality Award: Responsibility and influence over the development processes.Participation in management teams and quality development groups as well as individual fields of responsibility.Training programs that have given insights and skills in quality management related to clinical practice.Nurses and physicians as key individuals gave legitimacy to development process, and served as management advisors.Collaboration between all kind of employees and responsibilities.Committed management. .
Effektivisering i byggproduktionen - Studier av arbete från ställningar, liftar och arbetsplattformar
The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.
Kundnytta vid grusvägsunderhåll ? Trafikantens syn på drift och underhåll av grusvägar i driftområde Trollhättan
The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.
Energieffektivisering av flerbostadshus från rekordåren. Analys av åtgärder med fokus på ytterväggar
The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.
Projektledning inom affärsutveckling för fastigheter: En studie om idé- och identifieringsfasen bland fastighetsföretag
The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.
Förslag till ny multihall i Mölndal. Användning av BIM vid projektering i tidiga skeden
The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.