The invention relates to the technical field of state monitoring, in particular to a state monitoring method and
system based on a
power grid intelligent
Internet of Things gateway device, and the method comprises the following steps: based on
the Internet of Things gateway device, collecting and analyzing multiple types of sensor signals, carrying out the unified arrangement to form a multi-parameter cooperative monitoring sequence, and comparing the changes of current and
voltage signals; and extracting a synchronous response ratio feature group, calculating a thermoelectric trend
consistency index in combination with the temperature change trend and the
current amplitude, screening an interference level section, and judging abnormal linkage. According to the method, cross-parameter
trend extraction, collaborative response, difference comparison and section identification are realized, correlation characteristics of multi-source signals in a continuous time period can be converted into identification basis, an abnormal forming process, a response link and
state evolution are discriminated by combined characteristics, and abnormal section, sequence attributes and synchronization factors are jointly applied, so that the accuracy of the multi-source
signal identification is improved, and the reliability of the multi-source
signal identification is improved. And the
identifiability and the classification capability of abnormal events under complex working conditions are improved.