Method and system for monitoring electrical load of electric devices

A method for monitoring an electric device coupled to a power circuit, the power circuit being coupled to a power supply, the power supply being configured for supplying power to the electric device, the method comprising:

• obtaining a power feature of the power circuit through a power feature meter;
• determining a type of the power feature meter;
• determining a type of the power supply according to a location of the power supply;
• adjusting the power feature according to the type of the power feature meter, the type of the power supply, and a reference voltage to generate a normalized power feature;
• and
• recognizing the electric device according to the normalized power feature.

A system for monitoring a plurality of electric devices, the system being coupled to a power circuit, the electric devices being coupled to the power circuit, the system comprising:

• a power feature extraction module configured to obtain a first power feature of the power circuit at a first time and obtain a second power feature of the power circuit at a second time, wherein the first time is different from the second time;
• an event detection module coupled to the power feature extraction module and configured to determine whether a power feature variation occurs according to the first power feature and the second power feature;
• a power feature normalization module coupled to the event detection module, wherein if the power feature variation occurs, the power feature normalization module is configured to adjust the first power feature to a first normalized power feature according to a reference voltage and adjust the second power feature to a second normalized power feature according to the reference voltage;
• and
• an electric device status recognition module coupled to the power feature normalization module and configured to recognize that a status of a first electric device of the electric devices is changed from a first status to a second status according to the first normalized power feature and the second normalized power feature.

A system for monitoring an electric device coupled to a power circuit, the power circuit being coupled to a power supply, the power supply being configured for supplying power to the electric device, the system comprising:

• a power feature extraction module configured to obtain a power feature of the power circuit through a power feature meter and determine a type of the power feature meter;
• a power feature normalization module coupled to the power feature extraction module and configured to determine a type of the power supply according to a location of the power supply and adjust the power feature according to the type of the power feature meter, the type of the power supply, and a reference voltage to generate a normalized power feature;
• and
• an electric device status recognition module coupled to the power feature normalization module and configured to recognize the electric device according to the normalized power feature.