FIELD

The present disclosure relates generally to detection of corona using audio data.

BACKGROUND

Corona is a type of electric discharge occurring in electrical systems in areas of very high electric field strength. Corona can be characterized by a glow, electromagnetic emanation, and/or a sound often described as sizzling bacon. For instance, when corona is visible, it can have a blue glow and can have significant brightness in ultraviolet wavelengths. Corona can cause damage to, for instance, wires, insulators, and/or other components of an electrical system.

Techniques for detecting corona can include ultraviolet detection, ultrasonic detection, and/or RF emission detection. However, such techniques can suffer disadvantages. For example, power lines can generate corona that can be detected using images captured by cameras operating in the ultraviolet spectrum. Such cameras, however, can be large and expensive. In some cases, the detection methods can require a user to manually operate a device and aim at an area suspected to contain corona. As such the detection methods can be cumbersome and non-autonomous.

SUMMARY

Aspects and advantages of embodiments of the present disclosure will be set forth in part in the following description, or may be learned from the description, or may be learned through practice of the embodiments.

One example aspect of the present disclosure is directed to a method for detecting corona in an electrical system. The method can include obtaining, by one or more computing devices, audio data indicative of audio associated with the electrical system for at least one time interval. The method can include partitioning, by the one or more computing devices, the audio data for the time interval into a plurality of time windows. The method can include determining, by the one or more computing devices, a signal indicative of a presence of corona based at least in part on audio data collected within an identified time window of the plurality of time windows relative to audio data collected for a remainder of the time interval.

Other examples aspects of the present disclosure are directed to apparatus, electronic devices, non-transitory computer-readable media, smart clamps, power devices, and other devices configured to detect corona in electrical systems based at least in part on audio data.

These and other features, aspects and advantages of various embodiments will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the related principles.

