Method and system employing graphical electric load categorization to identify one of a plurality of different electric load types

摘要

A system for different electric loads includes sensors structured to sense voltage and current signals for each of the different electric loads; a hierarchical load feature database having a plurality of layers, with one of the layers including a plurality of different load categories; and a processor. The processor acquires voltage and current waveforms from the sensors for a corresponding one of the different electric loads; maps a voltage-current trajectory to a grid including a plurality of cells, each of which is assigned a binary value of zero or one; extracts a plurality of different features from the mapped grid of cells as a graphical signature of the corresponding one of the different electric loads; derives a category of the corresponding one of the different electric loads from the database; and identifies one of a plurality of different electric load types for the corresponding one of the different electric loads.

主权项

1. A system for a plurality of different electric loads, the system comprising:
a plurality of sensors structured to sense a voltage signal and a current signal for each of the different electric loads; a hierarchical load feature database comprising a plurality of layers, with one of said layers including a plurality of different load categories; and a processor structured to:
acquire a voltage waveform and a current waveform from the sensors for a corresponding one of the different electric loads;map a voltage-current trajectory to a grid including a plurality of cells, each of said cells being assigned a binary value of zero or one based on whether the voltage-current trajectory passes through each of said cells;extract a plurality of different features from the mapped grid of cells as a graphical signature of the corresponding one of the different electric loads;derive a category of the corresponding one of the different electric loads from the hierarchical load feature database; andidentify one of a plurality of different electric load types for the corresponding one of the different electric loads.