| 摘要 |
A system (100) for different electric loads (102,103,104) includes sensors (106) structured to sense voltage and current signals (107) for each of the different electric loads; a hierarchical load feature database (108) having a plurality of layers (110), with one (112) of the layers including a plurality of different load categories; and a processor (114). 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. |
