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| The Temperature Characteristics of Photoacoustic Spectroscopy Detection for Dissolved Gases in Transformer Oil |
| Chen Weigen1, Liu Bingjie1, Zhou Hengyi2, Wang Youyuan1 |
| 1. State Key Laboratory of Power Transmission Equipment &System Security and New Technology, Chongqing University Chongqing 400030 China; 2. Hunan Electric Power Company Testing Research Institute Changsha 410007 China |
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Abstract Gas photoacoustic spectroscopy (PAS) can be well applied in transformer oil-dissolved gas detection online monitoring. The effect of temperature on the photoacoustic spectroscopy detection is significant. A portable and tunable experimental setup with a distributed feedback diode laser is developed based on the fundamental of PAS in the paper. The influences of temperature on photoacoustic cell constant, resonant frequency and gas absorption coefficients with the experiments are discussed. Based on the experimental analysis of the acetylene dissolved in transformer oil, the relationships between acetylene photoacoustic signal and temperature are given. The theoretical and experimental results laid an important foundation, for the further improvement in oil gas photoacoustic spectroscopy of on-line monitoring system.
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Received: 29 October 2009
Published: 04 March 2014
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2010, Vol. 25 
