The expected reduction of energy not supplied to consumers after installation the identifiers of single-phase-to-earth fault in power networks with isolated neutral

Abstract

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-phaseto-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-toearth fault in the power network, the greater will be the reduction in the EENS