Features of collecting and processing of statistics data for calculating reliability indicators of relay protection
Introduction. To solve problems related to determining the reliability of the operation of relay protection devices, initial data on the values of reliability indicators of circuit elements are required. The deficit of initial data is one of the features of relay protection. Materials and Methods. The issue of determining the most rational methods of collecting and processing statistical damage data to relay protection equipment is considered. These approaches are necessary for further calculation of reliability, including to modern relay protection. The calculation of the minimum number of observations on damage to relay protection devices was made, taking into account the test plans. The question of the possibility of combining data on the reliability of relay protection obtained in different operating conditions, in different time periods, for different devices, etc. is being considered. To check the homogeneity of statistical information, the Wilcoxon's criterion was used. Results. The results of calculating the average failure rate for three types of relay protection cabinets are presented. Discussion. The analysis of the existing methods of processing the initial data on the damage of the relay protection with the prospect of their further revision is carried out. Conclusion. Despite the relevance of reliability calculations of modern relay protection devices, insufficient elaboration of existing methods and regulatory documents has been revealed. The necessity of careful collection of data on the operation of relay protection, as well as publication by operating organizations of statistical data on operating modes and malfunctions of relay protection devices is noted.