Apparatus and method for non-invasively analyzing behaviors of multiple power devices in circuit and monitoring power consumed by individual devices

A method for non-invasively identifying a specific power device among a plurality of power devices in a circuit, the method comprising:

• (a) a power analyzing device analyzing power information on power fed into the circuit, to thereby acquire power pattern information generated according to ON or OFF states of individual power devices;
• (b) the power analyzing device classifying pieces of the acquired power pattern information into each group of its own similar power patterns, to thereby acquire at least one piece of motif information which is information on at least one fingerprint;
• (c) the power analyzing device analyzing the power information on power fed into the circuit during a preset state-detecting time range, to thereby count the number of occurrences per motif, and identify one or more pairs of motifs whose differences in the number of occurrences per motif are within a preset range and whose average power variations are symmetrical to each other;
• and
• (d) the power analyzing device identifying the specific power device using the one or more pairs of identified motifs as information on an operation state of the specific power device;
• wherein, at the step of (c), in response to counting the number of occurrence per motif, the power analyzing device (i) generates a motif-counting graph by sorting the number of occurrence for each motif in a descending order and plotting the average power variations of each motif against the number of occurrence per motif and thus (ii) acquires one or more pairs of the motifs, whose differences in the number of occurrences per motif are within the preset range and whose average power variations are symmetrical to each other, by referring to the motif-counting graph,
• wherein, the power analyzing device acquires (i) motif information at points of time when each motif occurs and (ii) average power information between the points of time when each motif occurs, as partly selected real-time power consumption data, to thereby record or support another device to record the real-time power consumption data, in order to record activity states of the individual power devices in the circuit, and
• wherein, the power analyzing device acquires a power pattern between a first point of time, corresponding to when a first motif occurs, and a second point of time, corresponding to when a second motif occurs, by referring to (i) a power pattern generated by the first motif at the first point of time, (ii) the average power information between the first point of time and the second point of time, and (iii) a power pattern generated by the second motif at the second point of time.