Abstract
The problem of protection of a three-phase four-wire distribution network (DEN) with a voltage of 0.4 kV from the interruption of electric power lines is considered. On the basis of the analysis of the values of complex resistances of interpersonal sections of the main line of the network, criteria are proposed that allow detecting critical situations associated with discontinuities in power transmission lines. Using these criteria makes it possible to localize the places of breaks of phase and neutral wires. Mathematical models and methods that are used to evaluate the complex resistances of interpersonal sections of a three-phase network are briefly considered. The obtained results are oriented for use in the automated system of electricity control and accounting (ASMAE).
Highlights
At present, automated systems for monitoring and accounting of electric power (ASMAE) are widely implemented in automation and informatization of power consumption processes in distribution electrical networks (DEN) with a voltage of 0.4 kV [1,2,3,4]
It is especially important to identify the problem of identification and localization of breakage places of electric lines of a three-phase distribution network
Three-phase DEN with a voltage of 0.4 kV is considered, the design scheme of which is shown in the fig
Summary
At present, automated systems for monitoring and accounting of electric power (ASMAE) are widely implemented in automation and informatization of power consumption processes in distribution electrical networks (DEN) with a voltage of 0.4 kV [1,2,3,4]. The main structural and functional elements of these systems are data concentrators (DC), a set of electricity meters (EM) installed at the subscribers of the network. The main functions of the DC: operational data collection from a group of electricity meters (EM); storage of received data; digital processing of information to solve relevant functional problems; information exchange with the upper level of management. It should be noted, that in the framework of ASMAE, the tasks of commercial metering of electricity are being solved. The paper proposes one of the possible methods for solving it as part of ASMAE using real-time data from electricity meters installed at the network subscribers
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