EXPECTED REDUCTION OF ENERGY NOT SUPPLIED TO CONSUMERS AFTER INSTALLATION THE IDENTIFIERS OF SINGLE-PHASE-TO-EARTH FAULT IN POWER NETWORKS WITH ISOLATED NEUTRAL
Keywords:
identifier of single-phase-to-earth fault, reliability indicators, EENS indicator, electrical power networks of medium voltageAbstract
Statistical researches of failures in medium voltage electrical power networks, which are constructed as overhead
power lines with ACSR wire, show that most failures are due to single-phase-to-earth faults, which under certain
conditions can transit into interphase faults. To reduce the energy not supplied to consumers proposed to install the
special device in the power network. The name of this device is the identifier of single-phase-to-earth fault. It is
shown that if the device is installed on supports of the overhead line of the power network, this can reduce the
expected energy not supplied to consumers (EENS) by up to 32%. Moreover, the shorter the time it takes to locate
the single-phase-to-earth fault in the power network, the greater will be the reduction in the EENS.
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