Study on Miniaturized UHF Antennas for Partial Discharge Detection in High-Voltage Electrical Equipment
AbstractDetecting partial discharge (PD) is an effective way to evaluate the condition of high-voltage electrical equipment insulation. The UHF detection method has attracted attention due to its high sensitivity, strong interference resistance, and ability to locate PDs. In this paper, a miniaturized equiangular spiral antenna (ESA) for UHF detection that uses a printed circuit board is proposed. I-shaped, L-shaped, and C-shaped microstrip baluns were designed to match the impedance between the ESA and coaxial cable and were verified by a vector network analyzer. For comparison, three other types of UHF antenna were also designed: A microstrip patch antenna, a microstrip slot antenna, and a printed dipole antenna. Their antenna factors were calibrated in a uniform electric field of different frequencies modulated in a gigahertz transverse electromagnetic cell. We performed comparison experiments on PD signal detection using an artificial defect model based on the international IEC 60270 standard. We also conducted time-delay test experiments on the ESA sensor to locate a PD source. It was found that the proposed ESA sensor meets PD signal detection requirements. The sensor’s compact size makes it suitable for internal installation in high-voltage electrical equipment. View Full-Text
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Liu, J.; Zhang, G.; Dong, J.; Wang, J. Study on Miniaturized UHF Antennas for Partial Discharge Detection in High-Voltage Electrical Equipment. Sensors 2015, 15, 29434-29451.
Liu J, Zhang G, Dong J, Wang J. Study on Miniaturized UHF Antennas for Partial Discharge Detection in High-Voltage Electrical Equipment. Sensors. 2015; 15(11):29434-29451.Chicago/Turabian Style
Liu, Jingcun; Zhang, Guogang; Dong, Jinlong; Wang, Jianhua. 2015. "Study on Miniaturized UHF Antennas for Partial Discharge Detection in High-Voltage Electrical Equipment." Sensors 15, no. 11: 29434-29451.