Residual Voltage as Possible Cause of Equipment Damage and Risk for Personnel under Overhead Power Transmission Lines Outage. Part 2

N. Rubcova; A. Tokarskiy; V. Ryabchenko; A. Konovalov

doi:doi:10.12737/article_59d4941fca5086.09341675

UDC 50

Residual Voltage as Possible Cause of Equipment Damage and Risk for Personnel under Overhead Power Transmission Lines Outage. Part 2

Published в Safety in Technosphere · Volume 6, Issue 3, 2017 · Pages 24–33 · Rubrics: Methods and means of safety

DOI 10.12737/article_59d4941fca5086.09341675

Received: 04.06.2017 Accepted: 25.06.2017 Published: 25.06.2017 Language of publication: RUS

Authors

N. Rubcova ¹ · A. Tokarskiy ² · V. Ryabchenko ³ · A. Konovalov ⁴

1 Izmerov Research Institute of Occupational Health (glavnyy nauchnyy sotrudnik)
, 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

ABSTRACT

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

Information Text References

Authors:

1. Izmerov Research Institute of Occupational Health (glavnyy nauchnyy sotrudnik)

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

Type:

Article

Pages:

from 24 to 33

Status:

Published

Subject area:

UDC 50

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

Text

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).

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