Mathematical model of isolation parameters continuous monitoring of the network with isolated neutral under 1kV

Abstract EN

The present work develops a mathematical model for calculating the real values of phase voltage with respect to the ground when the parameters of the equivalent circuit and the line voltage of the network’s insulation are known.

This model conducts a direct approach and classical calculation of phase voltages with respect to the ground in a three-phase electrical circuit with isolated neutral.

It consists of determination of real voltages with respect to the ground, namely by the given isolation parameters and the network’s voltage, calculates the phase voltages with respect to the ground.

In this model first we determine the neutral point displacement voltage without the connection of additional conductance’s and determine the voltage of separate phases, then connect to one of the phases an additional conductance and phase voltages is determined again.