A STUDY ON THE IMPLEMENTATION OF SINGLE POLE AUTO-RECLOSE (SPAR) AND THREE POLE AUTO-RECLOSE (TPAR) ON SYSTEM STABILITY IN COALFIRED POWER PLANT OUTLETS

• Main Author: Edi Santoso, Setyawan
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/87690
• Institution: Institut Teknologi Bandung

High-voltage overhead lines are highly susceptible to faults, especially temporary ones that can disrupt power supply. To occurrence of faults will lead the circuit breakers at the lines to open to protect the lines. The implementation of an autoreclose (AR) scheme is essential, as it allows the line to automatically reclose after a temporary fault. However, for large turbine generators, such as those in coalfired power plants (CFPPs), improper reclose operations carry serious risks. Two-phase or three-phase faults are more dangerous than single-phase faults because they generate stronger transients that are more difficult to manage. Incorrect reclose operations under these conditions can worsen the situation. This study analyzes and implements Single Pole Auto-reclose (SPAR) and Three Pole Auto-reclose (TPAR) schemes on high-voltage transmission lines connected to the Labuan Power Plant outlet. Simulation results indicate that the generator can maintain synchronization during normal operations and when one line is out of service for maintenance. Even when faults occur on another line during maintenance, the generator remains synchronized after the fault is cleared. These schemes have been implemented and tested on the Labuan-Saketi and Labuan- Menes transmission lines. The test results demonstrate that the designed autoreclose scheme can operate reliably, support automatic system recovery, and enhance the reliability of the Labuan Power Plant's transmission system.