Winding Temperature Measurement in a 154 kV Transformer Filled with Natural Ester Fluid

作者：Kweon Dongjin^*; Koo Kyosun

来源：Journal of Electrical Engineering and Technology, 2013, 8(1): 156-162.

DOI：10.5370/JEET.2013.8.1.156

• Power transformer
• Hot spot temperature
• Temperature measurement
• Optical fiber
• Heat run test

This paper measures the hot spot temperatures in a single-phase, 154 kV, 15/20 MVA power transformer filled with natural ester fluid using optical fiber sensors and compares them with those calculated by conventional heat run tests. A total of 14 optical fiber sensors were installed on the high-voltage and low-voltage windings to measure the hot spot temperatures. In addition, three thermocouples were installed in the transformer to measure the temperature distribution during the heat run tests. In the low-voltage winding, the hot spot temperature was 108.4 degrees C, calculated by the conventional heat run test. However, the hot spot temperature measured using the optical fiber sensor was 129.4 degrees C between turns 2 and 3 on the upper side of the low-voltage winding. Therefore, the hot spot temperature of the low-voltage winding measured using the optical fiber sensor was 21.0 degrees C higher than that calculated by the conventional heat run test.

• 出版日期2013-1