In Situ Photoacoustic Detection System for SO<sub>2</sub> in High-Pressure SF<sub>6</sub> Buffer Gas Using UV LED
Sulfur dioxide (SO<sub>2</sub>) is a key indicator for fault diagnosis in sulfur hexafluoride (SF<sub>6</sub>) gas-insulated equipment. In this work, an in situ photoacoustic detection system using an ultraviolet (UV) LED light as the excitation source was established to dete...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-12-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/22/24/9846 |
| _version_ | 1797455310617575424 |
|---|---|
| author | Wei Hu Kang Li Tunan Chen Zongjia Qiu Guoqiang Zhang |
| author_facet | Wei Hu Kang Li Tunan Chen Zongjia Qiu Guoqiang Zhang |
| author_sort | Wei Hu |
| collection | DOAJ |
| description | Sulfur dioxide (SO<sub>2</sub>) is a key indicator for fault diagnosis in sulfur hexafluoride (SF<sub>6</sub>) gas-insulated equipment. In this work, an in situ photoacoustic detection system using an ultraviolet (UV) LED light as the excitation source was established to detect SO<sub>2</sub> in high-pressure SF<sub>6</sub> buffer gas. The selection of the SO<sub>2</sub> absorption band is discussed in detail in the UV spectral regions. Based on the result of the spectrum selection, a UV LED with a nominal wavelength of 285 nm and a bandwidth of 13 nm was selected. A photoacoustic cell, as well as a high-pressure sealed gas vessel containing it, were designed to match the output optical beam and to generate a PA signal in the high-pressure SF6 buffer gas. The performance of the proposed system was assessed in terms of linearity and detection limit. An SO<sub>2</sub> detection limit (1σ) of 0.17 ppm was achieved. Additionally, a correction method was supplied to solve PA signal derivation induced by pressure fluctuation. The method can reduce the derivation from about 5% to 1% in the confirmation experiment. |
| first_indexed | 2024-03-09T15:52:36Z |
| format | Article |
| id | doaj.art-70b49178b3f64e6dad2f2018d3270e73 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T15:52:36Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-70b49178b3f64e6dad2f2018d3270e732023-11-24T17:56:18ZengMDPI AGSensors1424-82202022-12-012224984610.3390/s22249846In Situ Photoacoustic Detection System for SO<sub>2</sub> in High-Pressure SF<sub>6</sub> Buffer Gas Using UV LEDWei Hu0Kang Li1Tunan Chen2Zongjia Qiu3Guoqiang Zhang4State Key Laboratory of Power Grid Environmental Protection, China Electric Power Research Institute, Wuhan 430074, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaSulfur dioxide (SO<sub>2</sub>) is a key indicator for fault diagnosis in sulfur hexafluoride (SF<sub>6</sub>) gas-insulated equipment. In this work, an in situ photoacoustic detection system using an ultraviolet (UV) LED light as the excitation source was established to detect SO<sub>2</sub> in high-pressure SF<sub>6</sub> buffer gas. The selection of the SO<sub>2</sub> absorption band is discussed in detail in the UV spectral regions. Based on the result of the spectrum selection, a UV LED with a nominal wavelength of 285 nm and a bandwidth of 13 nm was selected. A photoacoustic cell, as well as a high-pressure sealed gas vessel containing it, were designed to match the output optical beam and to generate a PA signal in the high-pressure SF6 buffer gas. The performance of the proposed system was assessed in terms of linearity and detection limit. An SO<sub>2</sub> detection limit (1σ) of 0.17 ppm was achieved. Additionally, a correction method was supplied to solve PA signal derivation induced by pressure fluctuation. The method can reduce the derivation from about 5% to 1% in the confirmation experiment.https://www.mdpi.com/1424-8220/22/24/9846SO<sub>2</sub> gas detectionUV LEDphotoacoustic spectroscopyhigh-pressure buffer gaspressure correction |
| spellingShingle | Wei Hu Kang Li Tunan Chen Zongjia Qiu Guoqiang Zhang In Situ Photoacoustic Detection System for SO<sub>2</sub> in High-Pressure SF<sub>6</sub> Buffer Gas Using UV LED Sensors SO<sub>2</sub> gas detection UV LED photoacoustic spectroscopy high-pressure buffer gas pressure correction |
| title | In Situ Photoacoustic Detection System for SO<sub>2</sub> in High-Pressure SF<sub>6</sub> Buffer Gas Using UV LED |
| title_full | In Situ Photoacoustic Detection System for SO<sub>2</sub> in High-Pressure SF<sub>6</sub> Buffer Gas Using UV LED |
| title_fullStr | In Situ Photoacoustic Detection System for SO<sub>2</sub> in High-Pressure SF<sub>6</sub> Buffer Gas Using UV LED |
| title_full_unstemmed | In Situ Photoacoustic Detection System for SO<sub>2</sub> in High-Pressure SF<sub>6</sub> Buffer Gas Using UV LED |
| title_short | In Situ Photoacoustic Detection System for SO<sub>2</sub> in High-Pressure SF<sub>6</sub> Buffer Gas Using UV LED |
| title_sort | in situ photoacoustic detection system for so sub 2 sub in high pressure sf sub 6 sub buffer gas using uv led |
| topic | SO<sub>2</sub> gas detection UV LED photoacoustic spectroscopy high-pressure buffer gas pressure correction |
| url | https://www.mdpi.com/1424-8220/22/24/9846 |
| work_keys_str_mv | AT weihu insituphotoacousticdetectionsystemforsosub2subinhighpressuresfsub6subbuffergasusinguvled AT kangli insituphotoacousticdetectionsystemforsosub2subinhighpressuresfsub6subbuffergasusinguvled AT tunanchen insituphotoacousticdetectionsystemforsosub2subinhighpressuresfsub6subbuffergasusinguvled AT zongjiaqiu insituphotoacousticdetectionsystemforsosub2subinhighpressuresfsub6subbuffergasusinguvled AT guoqiangzhang insituphotoacousticdetectionsystemforsosub2subinhighpressuresfsub6subbuffergasusinguvled |