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METHOD AND DEVICE FOR DETERMINING THE ERROR LOCATION OF AN EARTH FAULT RELATING TO A LINE OF A THREE PHASE ELECTRICAL ENERGY SUPPLY NETWORK WITH NON-GROUNDED STAR POINT
METHOD AND DEVICE FOR DETERMINING THE ERROR LOCATION OF AN EARTH FAULT RELATING TO A LINE OF A THREE PHASE ELECTRICAL ENERGY SUPPLY NETWORK WITH NON-GROUNDED STAR POINT
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机译:确定与非接地星点的三相电能供应线有关的地球故障的误差定位的方法和装置
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摘要
A method for determining the fault location of a ground fault relating to a line of a three-phase electrical energy supply network with an ungrounded neutral point, in which current and voltage values are measured at one line end of the line. Following the occurrence of a ground fault on the line, the location of the fault is defined using the measured current and voltage values. The measured current and voltage values are converted into α-components and 0-components of a Clarke transformation, a location-dependent characteristic function of α-component and 0-component fault voltage values is defined in each case using the converted components and a propagation model for travelling waves on the line. The fault location is determined to be the location at which the two characteristic functions exhibit the closest match.
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