Power Transmission Lines With a Reduced Number of Wires in Mountain Territories

Buryanina, Nadezhda; KOROLYUK, Jurij; Maleeva, Evdokiia; Lesnykh, Elena

doi:10.21177/1998-4502-2018-10-3-404-410

Cited by 9 publications

(1 citation statement)

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“…-short circuit on the buses of workshop substations. At the same time, the power supply interruption time is the sum of the short circuit disconnection time on the supply line and the ASR operation time at the substation [4][5][6][7][8][9];…”

Section: Methodsmentioning

confidence: 99%

Sustainable operation analysis of the mining industry power supply system

et al. 2021

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The paper presents an analysis of operating currents and torques during self-starting of motors with a voltage of 6 kV for cases of short circuit in the head feeders from the main step-down substation and in the feeders to the most distant substations of mining enterprises. For the network under consideration, the characteristic modes are: short circuit on the buses of shop substations. For the mining industry when selfstarting asynchronous motors with a squirrel-cage rotor and synchronous motors with asynchronous startup, the current multiplicity will be determined by the duration of the power failure (run-down duration). It has been established that the acceleration of motors during self-start will be somewhat slower than the usual start, since self-start begins at a speed of 0.89–0.94 of the synchronous speed and a resistance torque is equal to 0.65–0.75 of the maximum motor torque. The self-starting time of the motors is from 9 s to 42 s. To ensure self-starting conditions in the most severe modes in mountain conditions, it is necessary to make changes to the protection settings presented in the work.

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Section: Methodsmentioning

confidence: 99%