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针对超高压气体绝缘金属封闭开关设备(GIS)气室微水超标,严重影响GIS设备内部的绝缘性能和电力系统的正常运行的问题,对科学有效的微水超标处理方法进行了研究.基于750 kV GIS气室内各部件材料表面微水析出特性,提出了一种GIS设备微水超标加热氮洗干燥处理工艺,利用局部加热的方法提升了GIS气室内气体和设备的整体温度,加速GIS气室内附着于各类固体材料微水的析出.建立了GIS设备微水加热处理的热流固耦合数学模型,基于气密分布在Fluent中进行模型的解耦和计算,得到了设备气室温升和微水析出量的提升,验证了加热氮洗干燥处理工艺的高效性;根据计算结果对加热模块的加热功率进行温升控制优化设计,寻求了加热模块的最优效率.研究结果表明:该微水超标加热氮洗干燥处理工艺能有效提高GIS气室内部温度,有利于微水的析出和设备的干燥,能够减少循环氮洗干燥次数,提升GIS设备现场检修效率.“,”Aiming at the problem of the micro water in the extra high voltage GIS gas chamber exceeding the standard, which seriously affecting the internal insulation of the equipment and the normal operation of the power system, the scientific and effective treatment for the GIS micro water exceeding problem in the gas chamber was studied. A new drying-treatment of heating and nitrogen washing for 750 kV GIS equipment was researched based on the characteristics of the micro water precipitation of the GIS indoor equipment materials. The drying-treatment was to raise the temperature of gas in the GIS chamber and the precipitation of the micro water. Estab-lishing the heat-fluid-solid coupling model of the drying treatment and calculating the temperature rise of the chamber, which will help the precipitation of the micro water, the feasibility of the drying-treatment is verified based on the Fluent decoupling results. The opti-mal heating power is designed based on the calculation to control the temperature rise under the allowable value. The results indicate that the drying-treatment of heating and nitrogen washing for GIS micro water exceeding can effectively improve the internal tempera-ture of GIS gas chamber and the precipitation of the micro water. The reoperation times of nitrogen washing is reduced, enhancing the GIS site maintenance efficiency.