METHOD FOR DETERMINING THE ZERO-SEQUENCE VOLTAGE IN A THREE-PHASE ELECTRICAL NETWORK WITH ISOLATED NEUTRAL

Abstract

At this work a method for determining the zero-sequence voltage in a threephase electrical network with isolated neutral is proposed. It lies in measuring the values of phase-to-phase voltage modules, voltage of phase B and voltage of phase A when additional capacitive conductance connected between phase A and earth. Also in article error analysis of developed method was conducted. The error analysis has shown that the developed method provides satisfactory accuracy when determining the zero-sequence voltage as well as simplicity and safety at production of works in existing electrical installations with voltages up to and
above 1000 V.