光声－超声双模态GIS气体层析成像技术研究

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中图分类号：TP751 文献标志码：A 文章编号：1007-2683（2025）04-0134-09

Research on Photoacoustic-Ultrasound Dual-Modal GIS Gas Tomography Technology

TANG Bingnan'， ZHOU Yao’， WANG Anjing² （1. Lijiang Electric Power Supply Bureau，Yunnan Power Grid Co.，Ltd.，Lijiang 6741OO，China; 2.Anhui Institute of Optics and Precision Mechanics，Chinese Academy of Sciences，Hefei 23O031，China）

Abstract： Recently， environmentally friendly insulating gases represented by （ CF3 ） 2 CFCN have been widely used in high-voltage insulatedswitchgear（GIS）invariouscoutrisduetotheirlowglobalwarmingpotentialandozonefreecharacteristics.Duetothe colorlessandodorlessnatureofnvironmentallyfriendlyinsulatinggases，inordertosolvetheproblemofleakagedetectinand accuratelylocatetheleakagepointsof insulatinggases，aphotoacoustic-ultrasonicdual-modalGISgastomographytechnologyis proposed.BasedonphotoacoustictomographyandS-codingultrasonictomographytechnology，theadvantagesof thetwotomography methodsareintegrated，efectivelyimprovingthesignal-tonoiseratioofimagingresultshileensuringresolution，whichprovides technical support for the reliable detection of （CF3）2CFCN gas leakage. Compared with traditional methods，the optimized design methodimprovesthesigal-tonoieatioofthemagingesultsbymorethanOdB，andthsignal-toiseratiocanectivelyreflect the gas concentration，ultimately providing a new technical means for GIS insulation gas leakage detection.

Keywords：GIS insulation gas； photoacoustic tomography；circular array； S-coding；gas leakage

0 引言

六氟化硫（ SF6 ）是20世纪初开发的一种合成气体，由于其优越的技术性能，几十年来，一直是高中压（HV和MV）气体绝缘开关设备（GIS）、气体断路器（GCB）和气体绝缘输电线路（GIL）的主要绝缘介质[1-4]。（剩余16795字）