Improving Safety of Works under Induced Voltage Taking Into Account the Asymmetric Operation Mode of the Influencing Line

Abstract

Currently, the repair and maintenance of overhead lines is necessary to ensure uninterrupted power supply. Analysis of the statistics of electrical injuries shows that accidents during this type of work make up the majority. One of the reasons is the effect of induced voltage on disconnected lines passing near active lines. When the overhead lines are grounded only at the workplace, the electrostatic component is completely removed, but accidents occur during such work.When calculating the capacitive current for three-phase lines, it is necessary to take into account the increase in the number of wires, the phase shift of currents in the influencing line and partial capacitances. The calculation of induced voltages is carried out for symmetric modes of network operation. In practice, it is necessary to take into account the asymmetry at different loads at energy enterprises. It is shown that the asymmetry increases the value of the induced voltage.