ANALISIS SETTING ULANG AUTORECLOSE RELAY PADA JARINGAN TRANSMISI 150KV LINE TELLO-PANAKUKANG
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Mangatta Guntur Pakendek, Donri
Pasra, Nurmiati
Pasra, Nurmiati
Subject
Teknik Elektro
Datestamp
2022-10-10 04:52:18
Abstract :
To reduce the occurrence of disturbances in the distribution of electrical energy, a reliable protection system is needed as a safety. In the case at the Tello-Panakkukang Substation, a protection system failure occurred which resulted in a Trip on the Line. Resetting the autoreclose relay is needed, so that the system returns to normal. It can be seen from the reset that the LLDB is interrupted by a bus of 5 Ampere in the IL1 phase, a disturbance will occur for 1 second and will be normal for 1 second after that. Whereas in DLLB where VL1 is injected with a nominal value of 57.74V for 25 seconds and is given a fault current of 0.5 seconds of 5 Ampere at VL1, VL2 and IL1, IL2 then the system will turn off for 1 second (dead time) and will return normal in the next 1 second, this is a 1 phase to ground fault. In the transmission there are two types of interference, namely temporary and permanent interference. About 100% of what happens is a temporary disorder. There are power losses that can hinder the distribution of electrical energy at the substation, it is known that the Tello-panakukang substation is not in interconnection, the duration of the temporary disturbance without autoreclose is 1 hour for the temporary disturbance of autoreclose for 5 seconds based on the longest time setting and in the calculation, the loss is obtained - power loss based on existing fault current and calculation of total energy lost during temporary disturbance without autoreclose 185,714 kWh is greater than with autoreclose 258,60853982 kWh.
To reduce the occurrence of disturbances in the distribution of electrical energy, a reliable protection system is needed as a safety. In the case at the Tello-Panakkukang Substation, a protection system failure occurred which resulted in a Trip on the Line. Resetting the autoreclose relay is needed, so that the system returns to normal. It can be seen from the reset that the LLDB is interrupted by a bus of 5 Ampere in the IL1 phase, a disturbance will occur for 1 second and will be normal for 1 second after that. Whereas in DLLB where VL1 is injected with a nominal value of 57.74V for 25 seconds and is given a fault current of 0.5 seconds of 5 Ampere at VL1, VL2 and IL1, IL2 then the system will turn off for 1 second (dead time) and will return normal in the next 1 second, this is a 1 phase to ground fault. In the transmission there are two types of interference, namely temporary and permanent interference. About 100% of what happens is a temporary disorder. There are power losses that can hinder the distribution of electrical energy at the substation, it is known that the Tello-panakukang substation is not in interconnection, the duration of the temporary disturbance without autoreclose is 1 hour for the temporary disturbance of autoreclose for 5 seconds based on the longest time setting and in the calculation, the loss is obtained - power loss based on existing fault current and calculation of total energy lost during temporary disturbance without autoreclose 185,714 kWh is greater than with autoreclose 258,60853982 kWh.
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