METHOD FOR DYNAMICALLY PROCESSING ABNORMAL SAMPLING VALUE OF DIGITAL PROTECTION, MEASUREMENT AND MONITORING DEVICE

摘要

A method for dynamically processing the abnormal sampling value of a digital protection, measurement and monitoring device, the method comprising the following processes: (1) parameter initializing process; (2) sampling data receiving process; and (3) abnormal data processing process. The abnormal data processing process comprises: (a) detecting the quality of the sampling data; (b) comparing the two paths of digital sampling values of the same sampling channel; (c) calculating the amplitudes of the sampling data and the dynamic thresholds at the moment; (d) determining a sampling data and calculating the value of the dynamic thresholds at the moment; (e) determining whether the amount of numerical mutation is abnormal; and (f) conducting trigonometric interpolation on the sampling data. By detecting the quality of the sampling data, comparing the two paths of data and comparing the dynamic thresholds, the present method verifies the correctness of the sampling data, and conducts interpolation on the abnormal data, thus greatly improving the reliability of the protection device, and powerfully ensuring the safe operation of primary equipment and power grid.