Calibration of Cross Capacitive Sensor used for Transformer Oil Testing

In this work, an effort is being made to calibrate a cross capacitive sensor when used to measure the concentration of insulation degradation parameters in transformer oil. The cross capacitive sensor offers many privileges in oil-based sensing. Moisture and 2-furfuraldehyde (2-FAL) are the two most important insulation degradation by- products. The concentration of moisture and 2-FAL with in the oil has been directly related to the condition of transformer insulation. The cross-capacitive sensor is calibrated using regression analysis for the measurement of 2-FAL, moisture and mixture of 2-FAL and moisture in the oil.