| Title |
Ubiquitous Sensors for Supervision of Power Facilities in Overhead Power Distribution Lines |
| Authors |
Gyung-Suk Kil; Dae-Won Park ; Il-Kwon Ki ; Su-Yeon Choi ; Chang-Yong Park |
| Keywords |
Ubiquitous sensor network(USN) ; Power facility management ; Transformer ; Lightning arrester ; Rogowski coil ; Zero-phase current transformer ; Wireless communication module |
| Abstract |
Recently, ubiquitous sensor network(USN) techniques have been applied to electric power facility management. This paper dealt with the designed and fabricated ubiquitous sensors which monitor transformers and lightning arresters installed in overhead distribution systems. The sensors consist of a 8-[bit] microprocessor unit, a wireless communication module specified in IEEE 802.15.4, and associated electronics. A Rogowski coil was fabricated to measure load of transformer and surge current without saturation having good linearity up to 1000[A]. A zero-phase current transformer with a high relative permeability of 10? at 180[㎐] was used to detect small leakage current of 50[㎂]~1[㎃] flowing lightning arrester, and the frequency bandwidth of the module is ranges from 12[㎐] to l.24[㎑] at -3[㏈]. |