Compensation of Voltage Sags Due to Short Circuits on Distribution Lines (Feeders) with Dynamic Voltage Restorer (DVR)

Rakhmad Syafutra Lubis (Universitas Syiah Kuala)
Muhammad Iqbal Nasir Gade (Universitas Syiah Kuala)
Ramdhan Halid Siregar
Mahdi Syukri (Universitas Syiah Kuala)
Saifuddin Muhammad Jalil (Universitas Malikussaleh)

jes
Vol. 5 No. 1 (2026): June

Short circuit faults occur frequently on distribution lines. Such faults generate a fault current within a short interval and result in a momentary voltage drop, commonly known as a voltage sag. On a feeder, the short circuits that occur most often are single-phase-to-ground, two-phase, and three-phase faults. To determine the voltage sag on the line caused by a short circuit, it is necessary to analyze the short circuit fault current and voltage sag by assuming the fault point at 25%, 50%, 75%, and 100% of the total length of the BA 15 feeder. The voltage sag when a single-phase-to-ground short circuit occurs at 25%, 50%, 75%, and 100%, respectively, is 8663.68∠0° V, 5773.4∠0° V, 2886.87∠0° V, and 525.48∠0° V. When a two-phase short circuit occurs, the voltage sag is 19022.602∠0° V, 16637.035∠0° V, 12106.47∠0° V, and 11826.98∠0° V, while during a three-phase short circuit it is 5000∠-76.05° V, 10000∠-70.21° V, 15000∠67.05° V, and 18231.99∠24.29° V. This voltage sag disturbance can be corrected using a DVR, which injects the voltage required to restore normal conditions.