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TO THE PROBLEM OF DIAGNOSTICS OF THE TECHNICAL STATE OF THE DISTRIBUTION NETWORKS LINES ACCORDING TO AIMS EMA DATA

The problem of organization of monitoring and diagnosing of the technical state of a four-wire distribution electric network (DEN) by means of an automated information-measuring system of monitoring and accounting of electricity (AIMS EMA) consumed by subscribers is considered. As parameters characterizing the technical state of the DEN, the values of the active resistances of the lines (wires) in the network are taken. The indicated parameters can change significantly over time depending on the values of flowing currents, climatic factors of the external environment, as well as due to wear out of the wires. A technique of the operational identification of resistances of inter-subscriber DEN sections, which uses the data of the distribution network operating modes is proposed. Its implementation in AIMS EMA allows to monitor changes in values of their active resistances. A procedure of diagnosing lines in DEN is presented, it consists in analyzing the dynamics of active resistances values changes obtained at different points in time, and identifying the increase of the wear level of individual wires against the background of flowing currents and climatic factors. It is believed, that external influences lead to the same relative changes of parameters of all wires for the same interpersonal site. The wear diagnostic criterion is an increase of the active resistance values for individual wires with their unequal change relatively to the baseline values, which are determined during observations of the distribution network condition.