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Investigating the transformer operating conditions for evaluating the dielectric response.
| Content Provider | CiteSeerX |
|---|---|
| Author | Abdallah, Jalal M. |
| Abstract | Abstract—This paper presents an experimental investigation of transformer dielectric response and solid insulation water content. The dielectric response was carried out on the base of Hybrid Frequency Dielectric Spectroscopy and Polarization Current measurements method (FDS &PC). The calculation of the water content in paper is based on the water content in oil and the obtained equilibrium curves. A reference measurements were performed at equilibrium conditions for water content in oil and paper of transformer at different stable temperatures (25, 50, 60 and 70°C) to prepare references to evaluate the insulation behavior at the not equilibrium conditions. Some measurements performed at the different simulated normal working modes of transformer operation at the same temperature where the equilibrium conditions. The obtained results show that when transformer temperature is mach more than the its ambient temperature, the transformer temperature decreases immediately after disconnecting the transformer from the network and this temperature reduction influences the transformer insulation condition in the measuring process. In addition to the oil temperature at the near places to the sensors, the temperature uniformity in transformer which can be changed by a big change in the load of transformer before the measuring time will influence the result. The investigations have shown that the extremely influence of the time between disconnecting the transformer and beginning the measurements on the results. And the online monitoring for water content in paper measurements, on the basis of the oil water content on line monitoring and the obtained equilibrium curves. The measurements where performed continuously and for about 50 days without any disconnection in the prepared the adiabatic room. |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Water Content Dielectric Response Equilibrium Condition Transformer Operating Condition Transformer Temperature Obtained Equilibrium Curve Solid Insulation Water Content Temperature Reduction Oil Temperature Polarization Current Measurement Method Ambient Temperature Measuring Process Big Change Adiabatic Room Online Monitoring Transformer Dielectric Response Transformer Insulation Condition Temperature Uniformity Insulation Behavior Experimental Investigation Paper Measurement Obtained Result Line Monitoring Fds Pc Transformer Operation Near Place Hybrid Frequency Dielectric Spectroscopy Measuring Time Reference Measurement Different Stable Temperature Oil Water Content |
| Content Type | Text |
