Anti-current mutual-inductor saturated suddenly-changed quantity difference current dynamic recollecting discrimination method
A technology of a current transformer and a discrimination method, which is applied in the protection, electrical components, circuit devices and other directions that react to overcurrent, can solve the problems of equipment damage due to faults, limitation of sensitivity requirements of synchronous identification method, and limitation of rapidity of protection, etc. achieve high sensitivity
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[0042] The present invention will be further described below with reference to the accompanying drawings and examples.
[0043] The dynamic recall method of the busbar protection current transformer saturation mutation amount differential current of the present invention, its discrimination process is as follows:
[0044] ①According to the set time interval, collect the current transformer output terminal current of each branch of a certain busbar in the high-voltage and ultra-high-voltage equipment, and obtain the output terminal current I 1t , I 2t ... I nt , I 1(t+1) , I 2(t+1) ... I n(t+1) , I 1(t+2) , I 2(t+2) ... I n (t+2) ,..., I 1(t+m-1) , I 2(t+m-1) ... I n(t+m-1) . n is the serial number of the branch current transformer, m is the number of sampling points, the number of sampling points is the number of sampling points in one cycle, and the time interval is equal to the time of each cycle divided by the number of sampling points (T / m). t+1 represents the ...
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