Method for solving protection maloperation caused by abnormal large number based on floating threshold
An abnormal and large number technology, applied in the field of power system, can solve the problems of long data window, indistinguishable, poor real-time performance, etc.
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[0026] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0027] The method provided by the present invention based on the floating threshold to solve the protection maloperation caused by abnormally large numbers, its flow is as follows figure 1 shown, including the following steps:
[0028] Step 1. Under normal circumstances, the device always saves the current sampling value with a certain data window width and a certain sampling frequency. In this step, the original real-time sampling value without any processing is taken
[0029] Step 2, and calculate the variation of the current sampling value, namely . In the formula, n is the current point, N is the sampling period, i is the current value, and Δi is the cha...
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