| Title |
Study on a Partial Discharge Sensing Probe with BALUN-RLC Feeding Structure |
| Authors |
노태영(Taeyeong Noh) ; 김경호(Kyungho Kim) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.12.2281 |
| Keywords |
Partial Discharge; Balun; Spiral Sensing Probe; RLC Network; Feeding Structure |
| Abstract |
Arcing and partial discharge (PD) in power distribution panels pose fire hazards, requiring rapid detection. Conventional microstrip-fed sensing probes suffer from excessive volume and high return loss, limiting detection sensitivity. A BALUN-fed design reduced PCB volume by 57% and improved return loss by 2 dB but exhibited low-frequency resonance shift and degraded high-frequency detection above 600 MHz. To address this, an RLC-integrated BALUN feeding structure was proposed to enhance impedance matching and minimize return loss. Experimental results showed a 3 ? 5 dB return loss improvement, 8 dB signal strength increase, and 2× more detected signals across 100 MHz ? 1.5 GHz. The proposed method optimizes spatial efficiency and ensures stable signal reception, proving effective for PD detection in power distribution systems. |