Investigation of Log Periodic Dipole Array Printed Antenna for Recognizing Incipient Discharges in Power Transformer

Incipient Discharge (ID) online checking is a powerful mechanism for assessing insulation imperfections in power transformer. Nowadays, ultra high frequency (UHF) identification technique has gained more attention by researchers for online PD signals diagnosis. In this paper, a broad bandwidth log periodic dipole array (LPDA) printed antenna was designed. The antenna parameters were examined by ANSYS HFSS Software. The incipient discharge experiments were conducted on four distinctive mannered insulation fault models with the designed LPDA antenna. The results of experimental tests reveal that the designed LPDA antenna is appropriate and efficacious for real time PD signals diagnosis in transformers.