TWI456209B - Power abnormality detecting device and power abnormality detecting method thereof - Google Patents

Claims (10)

A power abnormality detecting device includes: a storage device for storing a plurality of reference power information of a plurality of reference electrical appliances; and a power information extracting device for capturing a power information to be tested of the electrical device to be tested, the test is to be tested The electrical appliance is of the same type as the reference electrical appliances; and a processor electrically coupled to the power information extractor and the storage device for performing the following operations: defining a plurality of power parameter types; and according to the power parameter types, The reference power information establishes a plurality of reference power events and establishes a power event to be tested from the power information to be tested; defines a plurality of power parameter variation ranges according to the power parameter types, and classifies the reference powers according to the power parameter variation ranges The event is to establish a plurality of reference power samples; calculate a first power parameter distribution of each of the reference power samples; combine the power events to be tested to each of the reference power samples, and calculate a second power parameter distribution of each of the reference power samples; Calculating a difference between each of the first power parameter distribution and the second power parameter distribution; and root Such differences, it is determined that abnormality occurs test appliance. The power abnormality detecting device of claim 1, wherein the processor further defines at least one of the power parameter types as an interval type power parameter type, the at least one interval type power parameter type having a tolerance interval, and reducing The difference between each of the first power parameter distribution and the second power parameter distribution. The power abnormality detecting device according to claim 1, wherein the processor is configured according to each The difference is calculated by an offset between the first principal component direction of the first power parameter distribution and the second principal component direction of the second power parameter distribution. The power abnormality detecting device of claim 1, wherein the processor further defines a difference threshold value, and determines that the electrical appliance to be tested is abnormal when the difference exceeds the difference threshold value. The power abnormality detecting device of claim 1, wherein the power parameter types include power consumption, appliance opening time, appliance closing time, and power consumption duration. A power abnormality detecting method for a power abnormality detecting device, the power abnormality detecting device comprising a memory, a power information extractor, and an electrical connection to the storage device and the power information extractor The power abnormality detecting method includes the following steps: (a) causing the memory to store a plurality of reference power information of the plurality of reference appliances; (b) causing the power information extractor to take one of the devices to be tested to be tested Power information, the electrical device to be tested is of the same type as the reference electrical appliances; (c) causing the processor to define a plurality of power parameter types; (d) causing the processor to establish from the reference power information based on the power parameter types The plurality of reference power events and the power information to be tested establish a power event to be tested; (e) causing the processor to define a range of variation of the plurality of power parameters according to the types of the power parameters, and classifying the reference according to the range of fluctuations of the power parameters a power event to establish a plurality of reference power samples; (f) causing the processor to calculate one of the first power parameters of each of the reference power samples (g) causing the processor to combine the power event to be tested to each of the reference power samples, and calculate a second power parameter distribution of each of the reference power samples; (h) causing the processor to calculate each of the first a difference between the power parameter distribution and the second power parameter distribution; and (i) causing the processor to determine that the electrical device under test is abnormal according to the difference. The power abnormality detecting method according to claim 6, wherein the step (c) further comprises the following steps: (c1) causing the processor to define at least one of the power parameter types as an interval type power parameter type, the at least An interval type power parameter type has a tolerance interval, and the difference between each of the first power parameter distribution and the second power parameter distribution is reduced. The power abnormality detecting method according to claim 6, wherein the step (h) further comprises the following steps: (h1) causing the processor to select one of the first principal component directions and the second according to each of the first power parameter distributions The difference between the second principal component directions of the power parameter distribution is calculated. The power abnormality detecting method according to claim 6, wherein the step (i) further comprises the following steps: (i1) causing the processor to define a difference threshold value, and determining that the difference is when the difference exceeds the difference threshold value; An abnormality occurred in the measuring instrument. The power abnormality detecting method according to claim 6, wherein the power parameter type It includes electricity consumption, appliance opening time, appliance shutdown time, and power consumption duration.