Abstract: A method of recognizing partial discharges emitted inside or outside electrical equipment after at least one partial discharge activity has been detected Partial discharge patterns are recorded beforehand in a data base, each pattern being associated with the type of fault that generated it. A new partial discharge (Pd) pattern is acquired. The new partial discharge pattern is compared with discharge patterns that are already recorded in the data base The matching fault in the equipment is obtained by deduction, and the result is recorded in the data base.

Abstract: The invention provides an intelligent assessment method of main insulation condition of transformer oil paper insulation, comprising: establishing at least one standard states; for each standard state, performing accelerated thermal aging tests on a plurality of samples to place the samples in the standard state, wherein each of the plurality of samples undergoes the accelerated thermal aging tests for different time periods; extracting time and frequency domain characteristic parameters of each of the plurality of samples; forming a feature vector using the time and frequency domain characteristic parameters of each sample, and forming a knowledge base from feature vectors of all samples; training a classifier by using the feature vectors of the knowledge base; and assessing the main insulation condition by using the trained classifier.

Abstract: A method of locating a partial discharge emission zone and to the associated device. The method is characterized in that it comprises a step of measuring partial discharge signals by means of four identical measurement channels each including a VHF and/or UHF detector, the four VHF and/or UHF detectors being positioned at the four vertices of a square or rectangle in such a manner that the partial discharge emission zone is determined inside the square or rectangle.

Abstract: A method of recognizing partial discharges emitted inside or outside electrical equipment after at least one partial discharge activity has been detected Partial discharge patterns are recorded beforehand in a data base, each pattern being associated with the type of fault that generated it. A new partial discharge (Pd) pattern is acquired. The new partial discharge pattern is compared with discharge patterns that are already recorded in the data base The matching fault in the equipment is obtained by deduction, and the result is recorded in the data base.

Abstract: The invention relates to detection apparatus for detecting a partial discharge from live electrical apparatus, the detection apparatus comprising detection means (Pc) mounted on the live electrical apparatus (T) for the purpose of detecting the occurrence of at least one partial discharge, wherein said detection apparatus further comprises additional means (D1, D2, S) suitable for determining whether a detected partial discharge is internal or external relative to the live apparatus.

Abstract: A method of locating a partial discharge emission zone and to the associated device. The method is characterized in that it comprises a step of measuring partial discharge signals by means of four identical measurement channels each including a VHF and/or UHF detector, the four VHF and/or UHF detectors being positioned at the four vertices of a square or rectangle in such a manner that the partial discharge emission zone is determined inside the square or rectangle.

Abstract: The invention relates to detection apparatus for detecting a partial discharge from live electrical apparatus, the detection apparatus comprising detection means (Pc) mounted on the live electrical apparatus (T) for the purpose of detecting the occurrence of at least one partial discharge, wherein said detection apparatus further comprises additional means (D1, D2, S) suitable for determining whether a detected partial discharge is internal or external relative to the live apparatus.