13 uppsatser
Identifiering av för- och nackdelar med nätstationsmätning, Mälarenergi Elnät AB
… grid network. One way to gain better knowledge and information about the low voltage network is to install measuring equipment on the substation transformer´s secondary low voltage side that measures the low voltage network losses for that specific substation. By doing so, grid …
… Also, the power quality parameters flicker, harmonics, unbalance and voltage variations are compared to regulated limits. Long term voltage variations and flicker emission levels have been calculated from simulation results obtained in PowerGrid and PSS®E at seven different …
… of the currenttransformers. The measurements in this study involve current, voltage, power, power factor,temperature, energy and power quality.Measuring instruments that are relevant to implement are intended to measure current,voltage, power, power factor, energy and, possibly …
… force the steel could withstand was calculated and the stability of the output voltage to the same weight was tested. A polynomial regression calculation was used to convert the voltage output received from the ridden tests into rein tension in kilograms. The results show that …
… the prototype against external disturbances such as inappropriate supply voltages and transients on the input stages.Software has been written for the microcontroller to perform the various measurements required by the prototype. These include RMS, integration and filtering …
To be able to measure high-surge voltages and transients with short rise times youneed measuring instruments with a high sampling frequency and large Bandwidth.These surges and transients occur primarily at lightning but can also occur at forexample at connecting errors at an …
To be able to measure high-surge voltages and transients with short rise times youneed measuring instruments with a high sampling frequency and large Bandwidth.These surges and transients occur primarily at lightning but can also occur at forexample at connecting errors at an …
To be able to measure high-surge voltages and transients with short rise times youneed measuring instruments with a high sampling frequency and large Bandwidth.These surges and transients occur primarily at lightning but can also occur at forexample at connecting errors at an …
… values with a one hour time resolution of the following parameters: voltage (per phase), current (per phase) andactive power and active and reactive energy. In order to analyze the collected data an analysis tool is required. During this thesis two customized tools in Microsoft …
Energimätning och övervakning kan bidra till minskad energiförbrukning genom att hjälpa en användare att ta beslut över energianvändandet. Valet av examensarbete gjordes p.g.a. behovet att ge användarna möjlighet att påverka sin energiförbrukning och övervaka sina elprodukter …
… and organize activities in the industry.In this study the measurements of voltage, current, power and PF performance on injection molding machines (K-TEC 275 form Ferromatik Milacron in Germany) with a focus to locate, within a machine, various measures that could improve energy …
I samband med att mellanspänningsnätet kablifieras ökar också kraven vad gäller fellokalisering. För att hålla avbrottstiderna i nätet korta är effektiv felsökning erforderlig. Detta arbete syftar till att kartlägga och redogöra för begränsande faktorer som finns vid …
Josi Periferi strömmeter
… cable, the magnetic field asymmetric flux density can be used and induce voltage proportional to the current in the cable. The result is an instrument that with a computer calculates current, phase angle and power. Measurements of the current rms value showed that the maximum …
