| Non-intrusive load monitoring only need to install a device on the user's entrance line,by collecting the total voltage and current of user's total input line,and then through the advanced algorithm to achieve the depth perception of user behavior.Because there is no need to invade the user inside to construct and it is easy to promote large-scale application,it has been widely concerned by domestic and foreign scholars and power companies.This paper introduces the application of non-invasive load monitoring technology in electrical operation identification and short circuit fault location.The specific contents and conclusions include:(1)This paper summarizes the non-invasive load identification and monitoring technology,and analyzes in detail the research status of load acquisition and processing,non-invasive load identification algorithm and non-invasive short-circuit fault identification technology.(2)This paper studies the characteristics of the identification of typical household appliances,designs the test platform to simulate the actual working conditions,and completes the setting of typical household appliances identification feature quantity.(3)An algorithm based on hierarchical classification is proposed,which uses the online training method to obtain the algorithm criterion.Specifically,the similarity is realized by running time,running time long,intermittent operation and so on.(4)This paper presents a non-invasive short-circuit accident detection method,builds a short-circuit fault test platform to extract the short-circuit current characteristic under the protection action of the circuit breaker,puts forward the setting procedure of the non-invasive short-circuit accident criterion,and analyzes two kinds of short-circuit accident location algorithms under non-invasive structures.(5)The design of non-invasive low-voltage circuit fault monitoring device is completed,and the detailed selection of each module is completed. |
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