摘要
SF_6或SF_6/N2混合绝缘气体的密度直接决定着气体的绝缘性能,因此对气体密度的监测尤为重要。SF_6混合绝缘气体被认为是短期内最具发展前景的SF_6替代介质,国家电网公司目前正大力推广GIS母线用SF_6/N_2混合绝缘气体的应用。由于SF_6混合绝缘气体具有新的特性,原有的SF_6气体密度继电器无法反映设备内SF_6混合绝缘气体密度,为此,亟需开发SF_6混合绝缘气体的密度监测装置。文章对比分析了两种不同原理的SF_6/N_2混合绝缘气体密度监测技术,并探讨了具备混合比监测功能的SF_6/N_2混合绝缘气体密度监测技术。
The density of SF_6 gas or SF_6/N_2 mixture gases directly determines the insulating properties of the insulating gases, so it is especially important to monitor the gas density. SF_6 mixture gases are regarded as the most promising insulating gases, and the State Grid Corporation of China is vigorously promoting SF_6/N_2 mixture gas in GIS bus duct. Because of the entirely different properties of SF_6 mixture gas, SF_6 gas density controller can not reflect the density of SF_6 mixture gas. So it is urgent to develop SF_6 mixture gas density monitor. This paper introduces two kinds of SF_6 gas density controller with different mechanism, and discusses the mixture gas monitoring technology with the mixing ratio detecting function.
引文
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