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Partial Discharge Measurement of OCP-Tapes in Rotating Electrical Machines

Journal of Energy and Power Engineering 2014年第8期8卷 1443-1448页

作者： Philipp Pretis Jurgen Fabian Christof Sumereder Michael Muhr Helmut Heinle Christoph Richter Bernhard Brandstatter Magna Steyr AG & Co KG Fuel and Battery Systems Graz 8041 Austria Institute of Automotive Engineering Graz University of Technology Graz 8010 Austria Institute of High Voltage Engineering and System Management Graz University of Technology Graz 8010 Austria High Voltage Test Facility ELIN Motoren GmbH Preding/Weiz 8160 Austria

Nowadays, pd （partial discharge） measurements are a crucial part of the preventive maintenance of electrical equipment within high voltage engineering. Especially for electrical machines, both the supplier and the user are interested in the results of pd measurements. However, pds hardly represent the cause of the failure, more likely they are claimed as the outcome of a failure. This paper deals with the insulation of a 6 kV electrical machine, whereas pd measurements were carried out at a single stator from wound coils. During manufacturing, these coils were equipped with different materials for the OCP （outer corona protection）. Using different pd measurement systems and different bandwidths, investigations of the pd behavior of the coils were carried out. Additionally, the surface resistivity of the corona protection was determined. As a result, conclusions for the correlations between the resistance of the OCP as well as the pd behavior are stated. Furthermore, the influence of using different measurement systems, different measuring circuits, and different bandwidths is shown.

关键词： pd behavior rotating electrical machine OCP-tapes pd measurement systems pd bandwidths

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