SF_6气体过热性分解模拟实验装置的研制

Design and Establishment of Experimental Simulation System Concerning SF_6 Thermal Decomposition

为系统研究SF6过热性分解机理及其分解特性,从而完善SF6分解理论和气体绝缘设备过热性故障的诊断方法,建立了过热性故障模拟实验系统。介绍了该实验系统的结构、功能、主要部件的设计参数和实验方法,并通过仿真与实验验证了该实验系统及实验方法的合理性。结果表明:建立的实验系统能够有效控制模拟过热性故障缺陷模型的温度,提出的实验方法能有效产生局部高温效应并使SF6发生分解,生成CO2、SOF2、SO2F2、H2S和SO2等主要分解物质,并初步获取了4个不同故障温度下主要分解物质的生成规律,为最终建立气体绝缘设备热性故障的诊断理论和方法奠定了实验基础。

In order to study the thermal decomposition characteristic and mechanism of SF6 systematically, so as to solidify the method by using SF6 decomposition theory to diagnose thermal fault of SF6 insulated equipment, we established an experimental simulation system of SF6 thermal decomposition. Focusing on the design parameters of system structure, function, main components and testing method, we conducted software simulation and experimental verification to prove the system＇s reliability. Results indicate that the experimental system can effectively control the temperature of simulated over-thermal fault, while the proposed testing method can availably produce local high temperature effect to cause SF6 decomposition and generate the main by-products of CO2, SOF2, SO2F2, H2 S, SO2, etc, so that the formation rules of main components under four different fault temperatures can be obtained initially. The results can provide solid experimental basis for final establishment of thermal fault diagnosis theory and method of gas-insulated devices.