The Frequency Stability Analysis Due to the Integration of 100 MW Solar Power Plant in the 150 kV Power System
A Case Study on the Impact of Large-Scale Solar PV Penetration on Grid Frequency Stability
Keywords:
PLTS, Frequency stability, DIgSILENT PowerFactory, Power System, RoCoFAbstract
This study analyzes the impact of integrating a 100 MW Solar Power Plant (PLTS) (4×25 MW) on the frequency stability of the power system in the 150 kV transmission network in Bali. Simulations were conducted using DIgSILENT PowerFactory software employing Load Flow and RMS Simulation methods, covering disturbance scenarios such as load increases up to 60%, generator outages (Gilimanuk and Pemaron), and the effect of system protection settings. Results show that without proper protection settings, the integration of PLTS leads to a frequency drop below the minimum threshold (47.76 Hz) and a high Rate of Change of Frequency (ROCOF) (-1.21 Hz/s), which poses a risk of system disconnection. After configuring protective relays (underfrequency, undervoltage, and df/dt), the system stability improved; frequency was maintained within the 48–52 Hz range, and ROCOF decreased below -0.5 Hz/s. Therefore, large-scale PLTS integration can be safely implemented without compromising system stability, provided that appropriate protection configurations are in place. This research supports the implementation of clean energy in Bali and serves as a reference for integrating renewable energy sources into existing power systems.
References
E. M. Wazeer, R. El-Azab, M. Daowd, and A. M. A. Ghany, “Short-Term Frequency Stability Regulation for Power System with Large-Scale Wind Energy Penetration Using PID Controller,” 2018 20th International Middle East Power Systems Conference, MEPCON 2018 - Proceedings, pp. 1059–1063, 2018, doi: 10.1109/MEPCON.2018.8635188.
V. Pavlovsky, A. Steliuk, O. Lenga, V. Zaychenko, and M. Vyshnevskyi, “Frequency stability simulation considering underfrequency load shedding relays, special protection automatics and AGC software models,” 2017 IEEE Manchester PowerTech, Powertech 2017, pp. 5–9, 2017, doi: 10.1109/PTC.2017.7981043.
H. H. Happ, Power system control and stability, vol. 67, no. 8. 2008. doi: 10.1109/proc.1979.11425.
V. Muzik and V. Vajnar, “Frequency and voltage stability assessment of a power system during emergency service states,” Proceedings of the 2018 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering, ElConRus 2018, vol. 2018-Janua, pp. 708–711, 2018, doi: 10.1109/EIConRus.2018.83171942.
K. Maslo, “Impact of Photovoltaics on Frequency Stability of Power System during Solar Eclipse,” IEEE Transactions on Power Systems, vol. 31, no. 5, pp. 3648–3655, 2016, doi: 10.1109/TPWRS.2015.2490245.
M. Yadav, N. Pal, and D. K. Saini, “Low voltage ride through capability for resilient electrical distribution system integrated with renewable energy resources,” Energy Reports, vol. 9, pp. 833–858, 2023, doi: 10.1016/j.egyr.2022.12.023.
Republik Indonesia, “Presidential Regulation Number 112 of 2022 (The Acceleration of Renewable Energy Development for Electricity),” The Government of Indonesia, no. 135413, pp. 1–37, 2022.
A. E. Saputra, A. U. Krismanto, and A. Lomi, “Baru Terbarukan Terhadap Kestabilan Frekuensi Pada Salu-ran Transmisi 150Kv Bali,” Magnetika, vol. 07, pp. 206–213, 2023.
I. Tf, “Inertia and ROCOF - Entsoe,” 2020.
F. Milano, “Frequency Stability in Future Power Systems with High Renewable Penetration,” IEEE Trans-actions on Power Systems, vol. 36, no. 3, pp. 2130–2141, 2021, doi: 10.1109/TPWRS.2020.3041456.
A. Ulbig, T. S. Borsche, and G. Andersson, “Impact of Low Rotational Inertia on Power System Stability and Operation,” IFAC Proceedings Volumes, vol. 47, no. 3, pp. 7290–7297, 2014.
PT PLN (Persero), Grid Code Indonesia Edisi 2019, Jakarta: PLN, 2019.
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Copyright (c) 2025 Vincentius Davis, Abraham Lomi, Irrine Budi Sulistiawati
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