Device and method for testing tripping characteristics of high-voltage transmission line in smoldering atmosphere

A technology of high-voltage transmission lines and experimental devices, which is applied to measuring devices, using optical methods for testing, measuring electricity, etc., can solve problems such as the success rate of line tripping and reclosing, the reduction of insulation strength, and the difficulty of recovery

Active Publication Date: 2021-06-11
NANJING TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a wildfire occurs, the temperature of the hot smoke can exceed 800°C. In addition, the smoldering combustion of biomass fuels in primitive and artificial forests often produces a large amount of dense smoke and ash. The insulation strength will be significantly reduced, which can easily cause line tripping and the success rate of reclosing is low. Therefore, such accidents often have the characteristics of high-frequency, long-lasting and large-scale outbreaks, and it is difficult to recover

Method used

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  • Device and method for testing tripping characteristics of high-voltage transmission line in smoldering atmosphere
  • Device and method for testing tripping characteristics of high-voltage transmission line in smoldering atmosphere
  • Device and method for testing tripping characteristics of high-voltage transmission line in smoldering atmosphere

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Experimental program
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Effect test

Embodiment 1

[0053] The uniform boost method measures the breakdown voltage of different flue gas atmospheres at a fixed distance. The operation steps are as follows:

[0054] 1) Smoldering: Connect each device well, add the prepared smoldering fuel into the smoldering container 11, the electric heating plate 8 starts to heat, and the temperature gradually rises to the point where the smoldering raw material inside produces smoldering smoke 32. Control the airtightness of the smoldering container 11 throughout the whole process, keep the internal temperature of the container constant, and make it transmit heat stably.

[0055] 2) Power on: After the entire discharge electrode combination is surrounded by smoldering smoke 32, start the booster to gradually increase the voltage, and use the transformer to control the boosting rate, and slowly increase the voltage until breakdown occurs. If breakdown does not occur Then continue to increase the voltage, and so on until the breakdown occurs, a...

Embodiment 2

[0063] The voltage equalization withstand method measures the breakdown distance of different flue gas ranges under a fixed voltage. The operation steps are as follows:

[0064] 1) Smoldering: Connect each device well, add the prepared smoldering fuel into the smoldering container 11, the electric heating plate 8 starts to heat, and the temperature gradually rises to the point where the smoldering raw material inside produces smoldering smoke 32. Control the airtightness of the smoldering container 11 throughout the whole process, keep the internal temperature of the container constant, and make it transmit heat stably.

[0065] 2) Power on: When the electric heating plate 8 is continuously heated so that the atmosphere of the smoldering smoke 32 fully surrounds the wires and cables 5, an appropriate voltage value (30kv) is selected and the voltage is applied, and the voltage remains unchanged throughout the experiment.

[0066] 3) Adjust the position of the two electrodes: ra...

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Abstract

The invention discloses an experimental device for tripping characteristics of a high-voltage transmission line in a smoldering atmosphere. The experimental device comprises a central information processor, a biomass fuel characteristic characterization module, a smoldering generation module, a smoldering smoke field characteristic test module, a power frequency power supply module and a tripping characteristic test module. According to the experimental device and method for the tripping characteristics of the high-voltage transmission line in the smoldering atmosphere, disclosed by the invention, the conditions, the process, the mode, the characteristics and the mechanism of discharge development in the smoldering atmosphere are explored, and multi-aspect characteristics of biomass fuels such as forest vegetation and the like can be fully represented; the forest vegetation characteristics of the high-voltage transmission line corridor area under various working conditions are restored, and the influence of the vegetation characteristics above the forest ground on the tripping characteristics of the high-voltage transmission line is reflected; performance characteristics of flue gas produced after smoldering of biomass fuels such as forest vegetation and the like are comprehensively and fully represented, and influence mechanisms and weight effects of single flue gas factors except a comprehensive fire source on tripping characteristics of a high-voltage transmission line under various working conditions are clearly detected.

Description

technical field [0001] The invention relates to the field of simulation and characteristic testing of the tripping process of high-voltage transmission lines induced by mountain fires, in particular to an experimental device and method for tripping characteristics of high-voltage transmission lines in a smoldering atmosphere. Background technique [0002] According to the "Standard Version of Electric Safety Management Regulations" (RHD-QB-K3433), under normal circumstances, air has good insulation performance, and a sufficient gas gap distance is maintained between high-voltage transmission lines and the ground and between different phase conductors to meet the high-voltage transmission line electrical requirements. security requirements. However, when a wildfire occurs, the temperature of the hot smoke can exceed 800°C. In addition, the smoldering combustion of biomass fuels in primitive and artificial forests often produces a large amount of dense smoke and ash. The insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/12
CPCG01R31/003G01R31/1272G01R31/1209G01R31/1218G01R31/08G05B19/042
Inventor 尤飞许志亮王胜王振华水凯赵耀鹏陈思怡
Owner NANJING TECH UNIV
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