Power Quality Improvement for Voltage Sag Issue in Industrial Customers
DOI:
https://doi.org/10.62146/ijecbe.v3i2.131Keywords:
Voltage Sag, Power Quality, Short-Circuit Current, ITIC Curve, ETAPAbstract
Customer demand today is no longer limited to ensuring the reliability of electricity supply, but also includes the continuity and delivery of high-quality electrical power. One of the main challenges affecting power quality is voltage sag, a condition frequently experienced by industrial customers, particularly at PT. Samator Gas Industri Palembang. This study aims to analyze the causes of voltage sag problems and evaluate the effectiveness of technical solutions. The methodology involves analyzing field observation data, recordings from a Fluke Power Quality Meter (PQM), and simulations of Line-to-Line (LL) and Three-Phase (L-3P) short-circuit faults using ETAP software. The simulation results are evaluated using the ITIC Curve to determine whether the observed voltage levels fall within acceptable operational boundaries or enter the prohibited zone. Simulations were conducted under normal operating conditions by integrating three technical solutions: Static VAR Compensator (SVC), IS-Limiter, and Diesel Rotary UPS (DRUPS). The findings indicate that although SVC can accelerate voltage recovery after a disturbance, its effectiveness is lower compared to the others. The IS-Limiter provides a rapid response to limit fault current and prevent the propagation of disturbances throughout the system. Meanwhile, DRUPS offers the fastest and most reliable voltage recovery, restoring voltage to 100% in less than 20 milliseconds.
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