{"title":"Breakdown Voltage Measurement of High Voltage Transformers Oils Using an Active Microwave Resonator Sensor","authors":"Ahmed A. Al-Mudhafar, Ali A. Abduljabar, Hayder Jawad Albattat","volume":195,"journal":"International Journal of Electronics and Communication Engineering","pagesStart":84,"pagesEnd":89,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10013026","abstract":"<p>This work suggests a microwave resonator sensor (MRS) device for measuring the oil\u2019s breakdown voltage of high voltage transformers. A precise high-sensitivity sensor is designed and manufactured based on a microstrip split ring resonator (SRR). To improve the sensor sensitivity, a radio frequency (RF) amplifier of 30 dB gain is linked through a transmission line of 50\u03a9. The sensor operates at a microwave band (L) with a quality factor of 1.35 \u00d7 105 when it is loaded with an empty tube. In this work, the sensor has been tested with three samples of high voltage transformer oil of different ages (new, middle, and damaged) where the quality factor differs with each sample. A mathematical model was built to calculate the breakdown voltage of the transformer oils and the accuracy of the results was higher than 90%.<\/p>","references":"[1]\tY. Du et al., \u201cEffect of semiconductive nanoparticles on insulating performances of transformer oil,\u201d IEEE Trans. Dielectr. Electr. Insul., vol. 19, no. 3, pp. 770\u2013776, 2012.\r\n[2]\tJ. Hao, M. Dan, R. Liao, and J. Li, \u201cEffect of moisture on particles accumulation and oil breakdown characteristics in mineral oil and natural ester under non-uniform DC electrical field,\u201d IEEE Access, vol. 7, pp. 101785\u2013101794, 2019.\r\n[3]\tD. H. Fontes, G. Ribatski, and E. P. 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