Monitoring device and method for telescopic displacement of GIS bus cylinder corrugated pipe of substation

Abstract

The invention provides a monitoring device for telescopic displacement of a GIS bus cylinder corrugated pipe of a substation. The monitoring device comprises a measuring meter including a high-precision DC power source. The high-precision DC power source is connected in series with a measuring resistor with the stable temperature coefficient and a high-precision sliding rheostat with a connectingrod; and the measuring resistor with the stable temperature coefficient is connected in parallel with a voltage signal acquisition and displacement calculating unit. The connecting rod made of a material with the stable temperature coefficient drives a high-precision sliding digital resistance meter screw to realize digital precise measurement of the horizontal telescopic displacement of a corrugated pipe; and a liquid crystal screen is used for realizing visualized display.ing. According to the invention, the powerful support is provided for quantitative monitoring of the temperature displacement of the GIS corrugated pipe.

Description

technical field [0001] The invention relates to the technical field of substation GIS state monitoring, in particular to a monitoring device and method for the expansion and contraction displacement of a GIS bus barrel bellows in a substation. Background technique [0002] For outdoor GIS equipment, especially in complex climate and geological environments, the busbar barrel is inevitably affected by factors such as thermal expansion and contraction caused by temperature changes during operation, uneven foundation subsidence, etc., and displacement of GIS equipment is inevitable. Therefore, in order to compensate the displacement and adjust the on-site installation size in engineering, it is necessary to install a metal bellows compensator on the bus barrel for installation adjustment, compensation for relative displacement between foundations, and displacement caused by thermal expansion and contraction during operation. [0003] Theoretically, through the correct and reaso...

AI Technical Summary

Problems solved by technology

[0003] Theoretically, through the correct and reasonable allocation of bellows and high-quality on-site installation and construction, the hazards of temperature-changing displacement stress can be effectively eliminated, but the actual engineering shows that: with the increase of operating time or due to the unreasonable or unreasonable cooperation between the bellows and the support or The failure of the displacement compensation function of the bellows due to product design or on-site installation and construction quality occurs from time to time. In the actual operation and maintenance work, it is impossible to monitor its dimensional changes through effective means. When the displacement of the expansion joint is large, it cannot be found in time, thus burying hidden dangers

Due to the lack of special measurement tools for outdoor GIS equipment to monitor the displacement changes of expansion joints in real time, it has become one of the main factors causing gas leakage of GIS equipment, which seriously threatens the reliability and safety of GIS equipment operation.

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