Open AccessEffect of distance relay settings on interference zone reading on 70 kV transmission lines Bolok - Maulafa using Digsilnet 15.1.7
Author(s) -
Agusthinus S. Sampeallo,
Nursalim Nursalim,
J F Mandala,
M A S Sagho
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2017/1/012014
Subject(s) - relay , transmission line , fault (geology) , ohm , electrical impedance , electrical engineering , conductor , transmission (telecommunications) , digital protective relay , line (geometry) , electric power transmission , protective relay , acoustics , telecommunications , engineering , physics , mathematics , geometry , geology , power (physics) , quantum mechanics , seismology
Distance relay is the main protection relay on the 70 kV Bolok - Maulafa transmission line. Distance Relay works by comparing the impedance on the line when in normal or abnormal conditions with the impedance attached to the relay. If the relay detects an abnormal condition in the line, namely when there is a short circuit or other disturbance, the relay will work according to the settings. The relay setting itself is divided into several areas of the relay work zone to work selectively in reading the disturbances that occur. This study aims to see how distance relay adjustment (Impedance Adjustment) affects the reading of the fault zone when there is a short circuit fault on the line. The Bolok - Maulafa 70 kV transmission line is divided into two protection zones. By using DigSILENT 15.1.7, the impedance is obtained according to the type of conductor used. By using the setup guidelines found on Doc: PDM / SGI15: 2014, the new tuning value for the distance relay on the 70 kV Bolok - Maulafa transmission line is obtained as follows: the new adjustment value for zone 1 and zone 2 carrying bay Bolok - Maulafa amounting to 4,698˂70.18⁰ sec. Ohm and 13,658˂70.18⁰ sec. Ohm. As for the delivery of Maulafa - Bolok, it was 4,264 ˂70.18 ⁰ sec. Ohm and 6,076˂70.18⁰ sec. Ohm. This new adjustment is compared with the adjustment of PT PLN in reading the fault zone by the characteristic curve of each relay using DigSilent 15.1.7. There is a 3-phase short circuit at the 10% point in the direction of Bolok to Maulafa relay with PT. PLN at Bolok Substation and Maulafa Main Substation reads disturbances in zone 1. While the relay with new settings at the Bolok substation reads disturbances in zone 1, and the relay at Maulafa Substation reads disturbances in zone 2.