Model of semiconductor gas sensor for monitoring dissolved gases in insulation oil

作者：Zhou Li Jun^*; Wu Guang Ning; Tang Ping; Wang Hong Liang; Su Chong

来源：Automation of Electric Power Systems, 2006, 30(10): 75-79.

• On line monitoring
• Power transformer
• Semiconductor gas sensor
• Stage model
• Steady state response
• Tangent function
• Transient response

Three hypotheses about steady-state response, transient response and resuming behavior of the semiconductor gas sensor are proposed, according to which, the logarithm of the steady-state resistance value and the logarithm of the gases concentration obey the tangent function, the transient response is determined by the current resistance of the sensor and the gases concentration, while the resuming behavior is determined by the current resistance of the sensor and gas concentration at the next interval. In order to validate the hypotheses, gases separating function is then modeled based ob the stage model. Relative coefficients are obtained by experiment and mathematical methods. The gas separating model and the three hypotheses are validated by comparing the simulating results with the experimental ones, which shows that the hypotheses are rational as seen in their application in the semiconductor of the monitoring system for dissolved gases in insulation oil.

• 出版日期2006
• 单位西南交通大学