Factors affecting PD detection in GIS using a carbon nanotube gas sensor
Factors affecting PD detection in GIS using a carbon nanotube gas sensor
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DOI：
10.1109/tdei.2007.369536
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发表时间：
2007-06
影响因子：
3.1
通讯作者：
W. Ding;K. Ochi;J. Suehiro;K. Imasaka;R. Hayashi;M. Hara
中科院分区：
文献类型：
--
作者：
W. Ding;K. Ochi;J. Suehiro;K. Imasaka;R. Hayashi;M. Hara
作者先前已经证明了碳纳米管（CNT）气体传感器可以检测部分放电（pd）产生的SF6分解副产物。然而，在将碳纳米管气体传感器应用于气体绝缘开关设备（GIS）的实际诊断之前，有几个因素需要考虑。本文研究了碳纳米管气体传感器的工作温度、安装位置和SF6/N2混合气三个主要因素的影响。通过控制传感器工作温度，提高了传感器电导的稳定性和对PD的响应。传感器的最大响应在70℃左右得到。CNT气体传感器安装在与GIS储罐相连的外部管道中，可以检测储罐中产生的PD，但由于传感器距离PD源较远，传感器响应变慢。结果表明，传感器对PD的响应明显依赖于SF6/N2混合气体的混合比例。传感器对SF6/N2（20%/80%）混合气体的响应最大。利用傅里叶变换红外（FTIR）对碳纳米管表面吸附的PD分解副产物进行了分析。
The authors have previously demonstrated that a carbon nanotube (CNT) gas sensor can detect SF6 decomposition byproducts generated by partial discharges (PDs). There are several factors to be considered, however, before applying the CNT gas sensor to practical diagnosis of a gas-insulated switchgear (GIS). In this paper, three major factors, namely, the effects of operating temperature and installation location of the CNT gas sensor and SF6/N2 gas mixture, were investigated. The stability of sensor conductance and the sensor response to PD were improved by controlling the sensor operating temperature. The maximum sensor response was obtained at about 70 degC. The CNT gas sensor, which was installed in an external pipe connected to the GIS tank, could detect PD generated in the tank, although the sensor response became lower and slower as the sensor was located further away from the PD source. It was found that the sensor response to PD showed a clear dependence on the mixing ratio of the SF6/N2 gas mixture. The maximum sensor response was achieved for SF6/N2 (20%/80%) gas mixture. This result was discussed based on Fourier transformation infrared (FTIR) analysis of PD decomposition byproducts adsorbed on the CNT surface.