Active and Reactive Power Distribution in the Parallel Operation of Synchronous Generators in A Medium-Voltage System at PT. PLTMGU Peaker Lombok
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This study analyzes the performance of a multi-generator power system operating in parallel, focusing on active power, reactive power, power factor, and load sharing. Data collected over three days were evaluated using statistical methods and three-phase power analysis. Results indicate that total active power remained stable on the first and second days (94.41 MW and 93.69 MW) but decreased to 63.39 MW on the third day due to fewer operating generators. Reactive power shifted from capacitive (-11.36 MVAr) on the first day to inductive conditions on the second and third days (15.55 MVAr and 14.16 MVAr). The power factor improved from 0.99 leading to approximately 0.98 lagging, indicating more optimal operation. Load sharing analysis shows the third day had the most balanced distribution (σ ≈ 90 kW), compared to the first (σ ≈ 480 kW) and second days (σ ≈ 740 kW). Voltage and frequency remained stable within 14.93–15.13 kV and 49.99–50.13 Hz. These findings highlight the importance of reactive power control and coordinated load sharing to enhance system efficiency and stability.
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