RESIDUAL VOLTAGE AS POSSIBLE CAUSE OF EQUIPMENT DAMAGE AND RISK FOR PERSONNEL UNDER OVERHEAD POWER TRANSMISSION LINES OUTAGE. PART 2
Abstract and keywords
Abstract (English):
This is continuation of the paper “Residual Voltage as Possible Cause of Equipment Damage and Risk for Personnel under Overhead Transmission Lines Outage. Part 1” where on the example of 500 kV overhead power transmission line (OHL) have been considered residual voltages arising between switch’s open contacts for each phase under outage of 500 kV OHL operating in idle mode. In the present paper have been carried out studies of residual voltages arising between phases switches under outage of 500 kV OHL. Maximal values of these resulting voltages exceed a double amplitude value of the OHL nominal phase value, and that may be the reason for a breakdown of the air gap between the switches, damage of the switches, and the risk for the personnel during a substation walk around.

Keywords:
overhead power transmission line, non periodic residual voltage, electric network’s periodic voltage, voltage between switches, breakdown between switches, damage of switches, personnel risk
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1. Введение
В первой части статьи [1] были рассмотрены остаточные напряжения, возникающие между контактами выключателей каждой фазы при отключении от сети воздушной линии (ВЛ) электропередачи 500 кВ, работающей в режиме холостого хода (ХХ).

References

1. Rubtsova N. B., Tokarskiy A. Yu., Ryabchenko V. N., Konovalov A. A. Ostatochnye napryazheniya kak vozmozhnaya prichina povrezhdeniya oborudovaniya i riska dlya personala pri otklyuchenii vozdushnykh liniy elektroperedachi. Chast’ 1 [Residual stresses as a possible cause of equipment damage and personnel risk when disconnecting overhead power lines. Part 1]. Bezopasnost’ v tekhnosfere [Safety in the technosphere]. 2017, I. 2, pp. 36–47. (in Russian).