| Title |
Design and Verification of an Energy Trigger-based LoRa Node System for Post-fault Section Detection |
| Authors |
반기종(Ban Gi Jong) ; 김병준(Kim Byung Jun) |
| Keywords |
Ground fault; Energy trigger; LoRa; Ringing energy; Ground fault detection; Distribution monitoring |
| Abstract |
This study proposes an energy-trigger-based node system that utilizes the high-frequency ringing energy induced in the line when an earth fault occurs in a distribution line or underground line. This system transmits only the information of nodes located in the post-fault section to the main server via a LoRa network. Since it is difficult to implement an actual line, an experimental setup was implemented to enable small-scale simulation. Through the experiment, a trigger pulse of 5?12 V was stably formed through a ferrite-rectifier circuit in the post-fault section node, but a voltage of less than 2 V was induced in the pre-fault section node, failing to reach the trigger condition. Furthermore, experiments based on a surge checker circuit confirmed that sufficient output energy is generated only after a ground fault in the ferrite-bridge-solenoid/LED circuit. The signal value generated by the sensor is amplified by an amplifier circuit to a level that can be processed by a microcontroller (MCU). The microcontroller detects this trigger signal and transmits it to the main server using LoRa communication. The receiver automatically identifies the section after the ground fault by lighting up the corresponding node ID, thereby supporting rapid and efficient accident recovery. |