Abstract
The transformer online monitoring system based on macromolecule membrane extraction acquires the concentration of gas dissolved in transformer oil only when the permeation equilibrium state is realized. Based on the analysis of gas permeation process, an algorithm is proposed to predict the gas concentration in permeation equilibrium state with the data of gas concentration in permeation nonequilibrium state. With Teflon membrane and electrochemical gas detection module, an online gas monitoring system is constructed and field tests are carried out. When the effect of fluctuant temperature is depressed, the biggest relative error between the predicted and the measured concentrations is 26.8%(H2, 26 μ L/L), better than the mean error of lab offline measurements surveyed by IEC, which demonstrates the feasibility of the proposed prediction algorithm.
| Original language | English |
|---|---|
| Pages (from-to) | 36-41 |
| Number of pages | 6 |
| Journal | Dianli Zidonghua Shebei/Electric Power Automation Equipment |
| Volume | 30 |
| Issue number | 12 |
| State | Published - Dec 2010 |
Keywords
- Gas extraction
- Nonequilibrium state
- Online monitoring
- Power transformer
- Prediction algorithm
- Teflon membrane
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