Corona detection using audio data

A system for detecting corona in an electrical system, the system comprising:

• a microphone configured to obtain audio data associated with the electrical system;
• a network interface;
• one or more processors;
• and
• one or more memory devices, wherein the one or more memory devices store computer-readable instructions that when executed by the one or more processors cause the one or more processors to perform operations, the operations including:
• obtaining audio data from the microphone, the audio data during at least one time interval, the time interval partitioned into a plurality of time windows;
• partitioning the audio data into a plurality of window audio data each corresponding to a respective one of said time windows;
• determining, by the one or more computing devices, a scaled ratio for each one of the plurality of time windows based on the plurality of window audio data;
• and
• determining a signal indicative of a presence of corona based at least in part on at least one window audio data relative to at least one scaled ratio of the scaled ratios.