RESIDUAL VOLTAGE AS POSSIBLE CAUSE OF EQUIPMENT DAMAGE AND RISK FOR PERSONNEL UNDER OVERHEAD POWER TRANSMISSION LINES OUTAGE. PART 2
Rubrics: METHODS AND MEANS OF SAFETY
Authors:
1.
Izmerov Research Institute of Occupational Health
(glavnyy nauchnyy sotrudnik)
RNK SIGRE (chlen)
Moskva, Moscow, Russian Federation
RNK SIGRE (chlen)
Moskva, Moscow, Russian Federation
2.
Research and Development Center of Federal Grid Company of Unified Energy System
(Senior Expert)
3.
Research and Development Center of Federal Grid Company of Unified Energy System
(Chief Technologist of Automatic Control System)
4.
ublic Joint-Stock Company “United Energy System Federal Grid Company
(Substation Department First Deputy Head)
Moskva, Moscow, Russian Federation
Moskva, Moscow, Russian Federation
Type:
Article
Pages:
from 24
to 33
Status:
Published
Received:
04.06.2017
Accepted:
25.06.2017
Published:
25.06.2017
Subject area:
UDK 50 Общие вопросы математических и естественных наук
Language:
Russian, English
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
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.
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
overhead power transmission line, non periodic residual voltage, electric network’s periodic voltage, voltage between switches, breakdown between switches, damage of switches, personnel risk
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).
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).
