Spectral approach to the estimation of the time series of the power change in the substation metering units and its application in the control modes of substation electricity metering systems

Abstract

The wide possibilities of modern interval metering devices installed at substations of distribution grid companies are not fully used today. In the process of measuring the electrical parameters of the network meters, there may be abnormal modes of electricity metering substations, resulting from intentional or negligent actions of staff, failure of existing equipment or parts thereof. The considered circumstances lead to large economic losses of electric power enterprises, expressed in the underestimation of electricity. One of the effective ways to solve this problem is the use of intelligent techniques to identify incorrectly operating metering stations of the substation network, as well as the development of an optimal model of an automated multifunctional information and measuring system for industrial use and software implementation. The purpose of the study – the development of methods of control and diagnosis of normal operation of the substation electricity metering system, determined by compliance with the reliability of electricity metering substation information and measurement systems. On the basis of the offered method the algorithm of control and diagnostics of modes of operation of the information-measuring equipment of system of the account of the electric power of substations is offered. The software for a two-level multifunctional measurement system combining the functionality of an automated electricity metering system, a system for monitoring and diagnosing the modes of operation of the information and measuring complex of substations, and a system for monitoring the quality of electricity has been developed. The results of the research were used in the development of recommendations for the construction of automated information and measurement systems based on existing power metering systems of substations for distribution grid companies. The developed technique and the corresponding algorithm of control and diagnostics of abnormal operating modes of information-measuring complex of substations allow to quickly determine the technical condition of the metering system of substations, to plan corrective measures to eliminate violations.