GIS PD内置声-磁多模态单体传感器基底与SF6相容性实验OA

The built-in acoustic-magnetic multimodal single sensor shows great potentials in highly sensitive perception of partial discharge(PD)ultrasonic signals and simultaneously integrating the differential sensing advantages of ultrasonic and ultra-high-frequency sensors for different PD defects.However,the compatibility between its substrate,SF6,and fault decomposition gases is critical for its integration into gas-insulated switchgear(GIS).Based on this,the paper constructed an experimental platform for the compatibility of SF6 and its fault decomposition gases with the substrate of the GIS PD built-in acoustic-magnetic multimodal single sensor.The platform was used to conduct thermal accelerated experiments on the compatibility of the acoustic-magnetic multimodal sensor substrate with SF6 and its fault decomposition gases un-der different experimental temperatures.Using Fourier transform infrared spectroscopy(FTIR),gas chromatography-mass spectrometry(GC-MS),scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS),and piezoelectric coefficient(d33)detector,we analyze SF6 gas composition changes and surface morphology,elemental variations,and pi-ezoelectric property degradation of the sensor substrate.The experimental findings indicate that polyvinylidene fluoride(PVDF),piezoelectric ceramic transducer(PZT),and poly(vinylidene fluoride-co-trifluoroethylene)(P(VDF-TrFE))do not have impacts on the composition of SF6 gas.However,PZT and PVDF can react with SOF2,a decomposition product of SF6,resulting in a reduction of its concentration.Moreover,the sensor substrates of PZT and PVDF are susceptible to corrosion by the fault decomposition gases.Both PZT and PVDF substrates suffer corrosion from fault gases,the F ele-ment on the substrate surface of PZT and PVDF sensors increases,and the piezoelectric properties of PZT deteriorate.These findings provide essential references for the design and application of built-in acoustic-magnetic multimodal sen-sors in GIS.