Power monitoring and analysis system for identifying individual electrical devices

A device comprising:

• sensors to produce signals representative of conditions of a common alternating current service for variously powering each of the plurality of electrical devices;
• an analog-to-digital conversion circuit to sample and to measure said signals;
• a digital processing circuit to process the sampled signals to produce a plurality of electrical parameter values;
• a preprocessing circuit to generate based on the plurality of electrical parameter values a set of transition reports, each transition report of the set of transition reports corresponding to a different respective transition each of a respective electrical device of a plurality of electrical devices between an off state and an on state, each transition report including a plurality of transition parameters characterizing a respective condition of a common alternating current service for variously powering each of the plurality of electrical devices, wherein each of the plurality of transition parameters of the set of transition reports includes a change in active power value;
• a data memory to store said set of transition reports;
• and
• a processing circuit to:
• identify from the set of transition reports a cluster of on-transition reports, each on-transition report of the cluster describing a transition of a respective one of the plurality of electrical devices to an on state, the processing circuit to identify the cluster including:
• for each active power value of a plurality of active power values, the processing circuit to determine a respective count of a number of the change in active power parameter values of the set of transition reports which are within an active power range for the active power value;
• and
• the processing circuit to identify a local maximum of the respective counts as being associated with the cluster;
• create, based on the identified cluster, a data structure characterizing a first device of the plurality of electrical devices, said data structure comprising a plurality of on-transition characterization parameters, wherein values of said on-transition characterization parameters are determined based on transition parameters of the cluster of on-transition reports;
• identify one of the set of transition reports as being an off-transition report associated with the first device;
• determine, based on the identified off-transition report, one or more values for a plurality of off-transition characterization parameters of the data structure;
• and
• provide the data structure for an automatic determining of whether a first transition report subsequent to the set of transition reports corresponds to the first device.