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Current differential principle is a well-known principle used for protection of transformers, motors, generators, buses, and any other type of power equipment with input and output current measurements. Further, the principle is used in developing percent differential protection, which can be programmed to the desired sensitivity for detecting in-zone faults and security during external faults. This...
Ground distance protection philosophies will affect how ground distance is applied to protect transmission lines. This paper will explore some of the common philosophies and demonstrate under which conditions each philosophy should be used. Some of the philosophies to be explored are resistive ground fault coverage, the use of Quadrilateral verses Mho characteristics, supervision and polarization...
The current differential protection is the most popular protection for transformers, providing good fault sensitivity, selectivity and security. Depending on the application, the transformer size, shape, winding connections vary. Some common power system applications require installation of two- or three-winding conventional power transformers or autotransformers, while others require phase shifting...
This paper presents new multi-ended method for locating faults on the transmission lines and incorporated into line current differential relay. Single-ended methods are impacted by too many factors, which makes them unreliable for operating personal. It was demonstrated in this paper that new fault location method based on the synchronized line current differential measurements gives significant advantage...
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