Abstract
The schematic diagram of optical cavity design has been introduced in detail; meanwhile, the principle of measuring the gas concentration with optical resonator is also introduced. The pressure distribution and the velocity distribution of the optical cavity have been simulated by finite element method. Finally, the field performance of the optical cavity has been tested. Using the optical cavity spectroscopy technology, the gas component detection system is set up to realize high precision online monitoring of gas components such as CO, H2S and HF. The detection system uses narrow line-width semiconductor laser to select the characteristic gas spectrum and output the absorption peak wavelength. Three kinds of gas concentration are measured by time division multiplexing, and the online sampling device of closed loop gas is integrated to complete the monitoring platform of high precision. The paper has developed the SF6 composition monitoring device based on optical attenuation technology, which provides the new research method for the online monitoring of gas components such as CO, H2S and HF with the high accuracy of 3 ppm.
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Acknowledgements
The paper is supported by the technology project if Chongqing Research Program of fundamental science and Advanced Technology (cstc2018jcyjAX0486) ; Science and Technology Project of Chongqing Power Company (2018 Science and Technology Project of Chongqing Power Company 4#).
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Zhang, S., Yao, Q., Jiang, M. (2020). Online Monitoring Study for SF6 Composition by Optical Cavity Sensing Technology in High-Voltage GIS. In: Peng, Y., Dong, X. (eds) Proceedings of 2018 International Conference on Optoelectronics and Measurement. Lecture Notes in Electrical Engineering, vol 567. Springer, Singapore. https://doi.org/10.1007/978-981-13-8595-7_40
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DOI: https://doi.org/10.1007/978-981-13-8595-7_40
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