摘要
SF_(6)气体因其优良的绝缘和灭弧性能而被广泛地使用在各类高压电器设备中。而当SF_(6)电气设备发生局部放电或过热等潜伏性故障时,会产生SO_(2)、H_(2)S等表征故障的特征组分气体,而特征气体组分检测技术判断设备故障的准确性与设备内部特征组分气体的扩散效应息息相关。因此本文采用CFD技术,基于FLUENT仿真模拟了SF_(6)电气设备中关键特征组分气体SO_(2)和H_(2)S在设备内的扩散情况,得到了SO_(2)和H_(2)S气体在SF_(6)电气设备内部扩散前期、中期和扩散均匀时的浓度分布和扩散均匀所需要的时间。结果表明,在封闭体系下,气体达到扩散均匀需要几十分钟到几个小时,浓度越大,扩散达到均匀的时间越长。得到气体扩散均匀浓度和时间有助于指导现场设备气体组分检测时间和周期,为判断设备内部潜伏性故障提供理论依据。
SF_(6) gas is widely used in various high voltage electrical equipment due to its excellent insulation and arc extinguishing performance.When SF_(6) electrical equipment has a latent fault such as partial discharge or overheating,it will produce SO_(2),H_(2)S and other characteristic component gases that characterize the fault.The characteristic gas component detection technology determines the accuracy of the equipment failure and the characteristic component gas inside the equipment.The proliferation effect is closely related.Therefore,this paper uses CFD technology to simulate the diffusion of SO_(2)and H_(2)S,which are the key characteristic components of SF_(6)electrical equipment,in the equipment based on FLUENT simulation.The time required for uniform concentration distribution and diffusion.The results show that in a closed system,it takes tens of minutes to several hours for the gas to reach uniform diffusion.The longer the concentration is,the longer the diffusion time is.The uniform concentration and time of gas diffusion are helpful to guide the detection time and period of gas components in field equipment,and provide theoretical basis for judging latent faults in equipment.
作者
贺毅
张靖
张英
朱春晓
王为
HE Yi;ZHANG Jing;ZHANG Ying;ZHU Chunxiao;WANG Wei(School of Electrical Engineering Guizhou University,Guiyang 550025 Guizhou,China;Electric Power Research Institute of Guizhou Power Grid Co.,Ltd.,Guiyang 550002 Guizhou,China)
出处
《电力大数据》
2021年第8期50-58,共9页
Power Systems and Big Data
