Transmission line fault detection method based on spearman correlation coefficient
A technology of correlation coefficient and fault detection, which is applied in the direction of fault location, fault detection according to conductor type, and electrical measurement, can solve the problems of insufficient sensitivity and achieve the effects of low synchronization requirements, insensitive abnormal data, and fast action speed
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[0060] Using the electromagnetic transient simulation software PSCAD / EMTDC to build the IEEE39 node system, the system structure is as follows figure 2 shown. figure 2 The circled G in the middle represents the generator, and the serial numbers 1 to 39 are the numbers of each busbar. The system voltage level is 345kV, the frequency is 60Hz, and the sampling frequency is 3kHz. Set the fault in the IEEE39 node system, take out the fault data, and program in MATLAB to realize the fault line detection algorithm.
[0061] In the following calculation example, AG represents a phase-to-ground fault, ABG represents a two-phase-to-ground short-circuit fault of A and B, AB represents a short-circuit fault between phases A and B, and ABC represents a three-phase short-circuit fault of A, B, and C.
[0062] Example 1
[0063] In the IEEE39 node system, the line L17-18 is set to fail at 5%, 50%, and 95% of the distance from the bus 17, respectively. The fault types are AG, ABG, AB, an...
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