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US 12,455,311 B2Granted
Method for partial discharge recognition in high voltage applications and unit using the method
AssigneeHSP Hochspannungsgeräte GmbH
InventorFabrizio Negri
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Abstract
A method for partial discharge recognition in high voltage applications and a high voltage unit using the method, includes the steps of detecting a signal, transforming the signal from time to frequency domain, cutting frequencies above a defined threshold, and retransform the truncated signal from frequency to time domain. The information content of detected and truncated signals is determined and compared.
Claims18
A method for partial discharge recognition in high voltage applications, comprising:
- detecting, at a high voltage unit, a signal associated with a partial discharge event;
- transforming, at a computing unit, the detected signal from time domain to frequency domain;
- cutting off frequencies of the detected signal above a defined threshold resulting in a truncated signal;
- retransforming the truncated signal from frequency domain to time domain;
- determining, at a computing unit, an information content of the detected signal and an information content of the truncated signal;
- and
- comparing the information content of the detected signal and the information content of the truncated signal to determine whether the detected signal includes partial discharge information, wherein the information content of the detected signal and the information content of the truncated signal are determined by a calculation of Shannon entropy.
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Dependencies are inferred from the claim text.