Study on Mechanical Vibration Characteristics of GIS Equipment under Variable Frequency Currents

Li, Xu; Hao, Jianmin; Liu, Qingsong; Gong, Ruilei; Jiang, Xiping; Ding, Yilin

doi:10.1109/ichve53725.2022.9961456

Cited by 1 publication

(1 citation statement)

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“…The disconnect switch is the most frequently operated unit in GIS, which is used to create obvious breakpoints and does not have arc extinguishing function. During repeated operation, the contacts of the disconnect switch will be impacted by mechanical closing force and the stress between the contacts, causing continuous wear and tear, leading to deterioration of the contact state of the disconnect switch [5]. The change in contact state causes an increase in contact resistance, and due to the contraction effect of current, the temperature of the contacts abnormally increases [6].…”

Section: Introductionmentioning

confidence: 99%

Inversion Method for Contact Temperature of GIS Disconnect Switch

Zhang,

Li,

et al. 2024

IEEE Access

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With the continuous development of China's power industry in recent years, the construction of China's power grid has developed rapidly in the context of modern society. In the process of building modern transformer substation in China, Gas Insulated Switchgear (GIS) has been widely used. The faults caused by poor contact in GIS account for 29% of all faults, making it the highest occurrence rate among all faults. Poor contact leads to abnormal temperature rise of the contacts, so it is necessary to conduct research of temperature rise. This article takes the 110kV three-phase co-box type GIS disconnect switch as the research object, establishes a simplified model, conducts simulation calculation of multi-field coupling, and achieves the goal of inverting the contact temperature with the temperature of monitoring points on the shell. In order to achieve this goal, this article further conduct temperature research. Selecting monitoring points on the surface of the shell and optimizing the selection of monitoring points using genetic algorithm, then analyzing the relationship between the temperature of the monitoring points and the contact temperature, a contact temperature inversion model based on the temperature of the monitoring points is established. The results show that the inversion model of contact temperature of GIS disconnect switch has high accuracy, with an error of less than 3%, and can be used for non-invasive monitoring of contact temperature.INDEX TERMS GIS disconnect switch; Multi physical field coupling; Monitoring points on the shell; Contact temperature

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Section: Introductionmentioning

confidence: 99%