Spatially continuous transformer online temperature monitoring based on distributed optical fibre sensing technology  

作　　者：Yunpeng Liu Xinye Li Huan Li Junyi Yin Jiaxue Wang Xiaozhou Fan 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Baoding,China [2]Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defence,North China Electric Power University,Baoding,China

出　　处：《High Voltage》2022年第2期336-345,共10页高电压（英文）

基　　金：funded by the Key Research and Development Program of Hebei Province(No.19212D);the Science and Technology Project of State Grid Corporation of China(No.SGHEDK00DYJS1900063).

摘　　要：Transformer internal thermal monitoring exists huge blind areas,and it is difficult for traditional methods to get fully distributed temperature in real time.In this contri-bution,the distributed optical fibre sensor was creatively applied inside an operating 35 kV oil‐immersed transformer which is also qualified for actual power grid oper-ation through the ex‐factory tests.Furthermore,the full‐region temperature along the windings and iron limbs were firstly monitored in a spatiotemporally continuous manner and the hotspots were also closely traced,fluctuating at 90%of the high‐voltage winding height(80%for low‐voltage winding)during the whole process of the heat‐run test.Corresponding Finite Element Method(FEM)for thermo‐fluid field calculation was then utilized for deeper analysis.On the former basis,the actual detected temperature distributions(both spatial and temporal)were compared with the International Electrotechnical Commission traditional model and some modifi-cations were suggested based on the real time measured data.This novel online monitoring application and the detailed internal thermal information may provide a solid reference for the delicate management of power transformers,which also offers a new horizon for the online monitoring in electrical apparatus industry.

关 键 词：WINDING FIBRE SPATIAL 

分 类 号：TM41[电气工程—电器]