Pattern matching based security protection method for relay protection information of electric system in network environment
A relay protection and pattern matching technology, applied in information technology support systems, emergency protection circuit devices, electrical components, etc., can solve encryption and decryption behavior failures, unfavorable relay protection rapidity, and inability to guarantee current and voltage sampling data Integrity and correctness and other issues to achieve the effect of preventing misoperation
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[0019] Such as figure 1 Schematic diagram of the probabilistic neural network structure of the input node, where the input data of the input node is each line, transformer current and bus voltage; the sample layer nodes are divided into real fault nodes and false fault nodes; the two nodes of the summation layer are respectively responsible for the real fault and false fault samples The output of the node is summed, and the output layer is The form of gives the output of the probabilistic neural network.
[0020] figure 2 It is a schematic diagram of substation current and voltage data collection. In the figure: CT 1~CT 6 are the current transformers installed in the lines in the substation; PT 1~PT 2 are the voltage transformers installed at the busbars in the substation; Feeder 1~Feeder 3 are the three feeders of the substation; PT and CT collect three-phase voltage and three-phase current respectively.
[0021] The following is figure 1 Take the shown substation as an examp...
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