GIS本体与表计环境温差对SF₆密度测量影响的实验研究

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关键词： SF6 密度；气体绝缘开关设备；自诊断；环境温度；温差；继电器DOI：10.15938/j. emc. 2025.09.005中图分类号：TM21 文献标志码：A 文章编号：1007-449X（2025）09-0051-10

Abstract ：To accurately assess the error in sulfur hexafluoride （ SF6 ） gas density measurement caused by the temperature difference between the environment and the equipment，an experimental analysis method was employed. A detection platform for SF 6 gas density capable of simulating various temperature differences was designed.By using a precise temperature control device to adjust the temperature of the meter and the environment，the influence mechanism of temperature diference on density measurement was systematically studied.Through experimental data analysis，it was found that when the meter temperature is lower than the equipment temperature，the measured density value shows an increasing trend. Within a temperature difference range of 0-10∘C ， the maximum error proportion reaches 3.23% . Conversely， when the meter temperature is higher than the equipment temperature，the density measurement value decreases，with an error proportion of up to 3.26% within the same temperature difference range. Under constant pressure conditions，the density measurement value is significantly negatively correlated with changes in ambient temperature，and the deviation from the standard value exhibits a highly linear relationship with the environmental temperature diffrence. Based on the above analysis，a self-diagnosis method for SF 6 density meters using time-series data was proposed，which can be used to identify abnormal density readings caused by environmental temperature differences. This method helps improve the ability to assess the true state of GIS equipment and provides technical support for the safe and stable operation of power equipment.

Keywords ： SF 6 density； gas insulated switchgear； self diagnosis；environmental temperature； tempera-ture difference ; relay

0引言

在现代电力设备中，六氟化硫（ SF6 ）因其卓越的绝缘性能和良好的电气特性而被广泛应用，尤其是在高压电力开关设备中[1-2]。（剩余15881字）