Method and apparatus for the analysis and monitoring of the partial discharge behavior of an electrical operating device

US7076404B2 · kind B2 · utility

Assignee

• ALSTOM Technology Ltd · CH

Inventors

• Bernd Freisleben · Bad Staffelstein, DE
• Martin Hoof · Kaiserslautern, DE
• Alban Kulla · Marburg, DE
• Eniana Mustafaraj · Marburg, DE
• Michael Peters · Waldshut-Tiengen, DE
• Christoph Wendel · Laufenbürg, DE

Key dates

• Filing date: Jan 15, 2004
• Grant date: Jul 11, 2006
• Expiry date: Jan 16, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/1272
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A description is given of a method for the analysis and/or monitoring of the partial discharge behavior of an electrical operating means, in particular in terms of its development over time. Here, appropriate partial discharge data is recorded in process state matrices (2, 3), in which, in each case in a matrix element (5) of the process state matrix (1), the amplitude (7) of a partial discharge, its phase angle (6) and its frequency of occurrence is depicted (in particular what is known as a PRPD representation). A simplified analysis is made possible by the fact that, at a first time, a partial discharge process state is registered in a first process state matrix (2) and, at a later time, a further partial discharge process state is registered in a further process state matrix (3). Then, for the purpose of analysis and/or monitoring, the first (2) and the second (3) process state matrix are compared with the aid of comparison and scaling methods.