Essays about: "reläskydd"
Showing result 1 - 5 of 8 essays containing the word reläskydd.
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1. Fault current injection from Inverter Based Generation in the distribution grid : A case study of distribution grid on the Swedish island of Gotland
University essay from Uppsala universitet/Institutionen för elektroteknikAbstract : This work proposes recommendations for new guidelines for fault current injection on a distribution grid. These guidelines will help improve the transition towards renewable electrical energy generation. READ MORE
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2. Fault energy implications of distributed converter interfaced generation : A case study of an underground mine grid
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : Adding Power Electronic Interfaced Devices (PEID) generation to grids is an increasing trend because of the concurrent development of better power electronic converters and a greater interest in a better utilisation of energy resources. Small and dispersed energy sources that would previously not be worth introducing into the grid is becoming more and more viable and other potential benefits such as better control of voltage levels and smoothing out load changes also spur this development. READ MORE
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3. Cross-Country Faults in Resonant-Earthed Networks
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : Reliability requirements for power systems have been constantly increasing, as customers of electric power desire high power availability. In order to improve continuity of supply in medium voltage (MV) networks, utilities in many countries in Europe, North/South America and Oceania use resonant earthing and allow the operation of the network during a single phasetoearth fault for periods from several seconds up to several hours, since the earthfault current at the fault point in such systems is considerably reduced and is unlikely to damage equipment or create hazardous voltages for people or livestock. READ MORE
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4. Automatic post-fault analysis based on disturbance data stored in substation devices : Approach towards the preventive maintenance
University essay from KTH/Hälsoinformatik och logistikAbstract : This report studies the possibilities of minimizing unplanned maintenance work and improving the availability of power supply by enabling preventive maintenance in power systems, without having to make additional investments in the existing systems. This was done using information from COMTRADE files (disturbance recording files) that are created in the event of a fault in the power system. READ MORE
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5. A novel approach to detect CT saturation using standalone CT measurements
University essay from KTH/ElkraftteknikAbstract : The requirement for reliability and security in power system is increasing every passingday with the increase in complexity of the power system. To ensure highest level ofreliability, protection relays have to receive correct measurements. One of the most importantmeasurement that is needed by a relay as an input is current. READ MORE
