Integration of Distributed Solar Energy into Saudi Smart Distribution Grids: Voltage Regulation, Hosting Capacity and Protection Challenges

References

[1] Alfaris FE, Al-Ammar EA, Ghazi GA, Al-Katheri AA. Design enhancement of grid-connected residential PV systems to meet the Saudi electricity regulations. Sustainability. 2024;16:5235. https://doi.org/10.3390/su16125235

[2] Al-Hanoot AK, Mokhlis H, Mekhilef S, Alghoul M, Shareef H, Samatar AM. Distributed PV systems in Saudi Arabia: Current status, challenges, and prospects. Energy Strategy Reviews. 2024;55:101535. https://doi.org/10.1016/j.esr.2024.101535

[3] Hassan A, El-Amin I. Formulation of billing policy for residential scale solar PV systems and its impact in the Kingdom of Saudi Arabia. Renewable Energy Focus. 2024;49:100568. https://doi.org/10.1016/j.ref.2024.100568

[4] Lopez-Ruiz HG, Blazquez J, Vittorio M. Assessing residential solar rooftop potential in Saudi Arabia using nighttime satellite images: A study for the city of Riyadh. Energy Policy. 2020;140:111399. https://doi.org/10.1016/j.enpol.2020.111399

[5] Elshurafa AM, Hasanov FJ, Hunt LC. Macroeconomic, energy, and emission effects of solar PV deployment at utility and distributed scales in Saudi Arabia. Energy Strategy Reviews. 2024;53:101423. https://doi.org/10.1016/j.esr.2024.101423

[6] Islam MT, Ali A. Sustainable green energy transition in Saudi Arabia: Characterizing policy framework, interrelations and future research directions. Next Energy. 2024;5:100161. https://doi.org/10.1016/j.nxener.2024.100161

[7] Al-Sharafi EA, Alhussein M, Ali A, Aurangzeb K. Rooftop solar PV policy assessment of global best practices and lessons learned for the Kingdom of Saudi Arabia. Sustainability. 2023;15:9630. https://doi.org/10.3390/su15129630

[8] Sanfilippo A, Vermeersch M, Bermudez Benito V. Energy transition strategies in the Gulf Cooperation Council countries. Energy Strategy Reviews. 2024;55:101512. https://doi.org/10.1016/j.esr.2024.101512

[9] Shi J, Ma L, Li C, Liu N, Zhang J. A comprehensive review of standards for distributed energy resource grid-integration and microgrid. Renewable and Sustainable Energy Reviews. 2022;170:112957. https://doi.org/10.1016/j.rser.2022.112957

[10] Balogun OA, Sun Y, Gbadega PA. Coordination of smart inverter-enabled distributed energy resources for optimal PV-BESS integration and voltage stability in modern power distribution networks: A systematic review and bibliometric analysis. e-Prime - Advances in Electrical Engineering, Electronics and Energy. 2024;10:100800. https://doi.org/10.1016/j.prime.2024.100800

[11] Qamar N, Arshad A, Mahmoud K, Lehtonen M. Hosting capacity in distribution grids: A review of definitions, performance indices, determination methodologies, and enhancement techniques. Energy Science & Engineering. 2023;11(4):1536–1559. https://doi.org/10.1002/ese3.1389

[12] Zain Ul Abideen M, Ellabban O, Al-Fagih L. A review of the tools and methods for distribution networks' hosting capacity calculation. Energies. 2020;13:2758. https://doi.org/10.3390/en13112758

[13] Benzerga A, Bahmanyar A, Derval G, Ernst D. A unified definition of hosting capacity, applications, and review. IEEE Access. 2025;13:7819–7836. https://doi.org/10.1109/ACCESS.2024.3521223

[14] Mousa HHH, Mahmoud K, Lehtonen M. A comprehensive review on recent developments of hosting capacity estimation and optimization for active distribution networks. IEEE Access. 2024;12:18545–18593. https://doi.org/10.1109/ACCESS.2024.3359431

[15] Mulenga E, Bollen MHJ, Etherden N. A review of hosting capacity quantification methods for photovoltaics in low-voltage distribution grids. International Journal of Electrical Power & Energy Systems. 2020;115:105445. https://doi.org/10.1016/j.ijepes.2019.105445

[16] Son YJ, Lim SH, Yoon SG, Khargonekar PP. Residential demand response-based load-shifting scheme to increase hosting capacity in distribution system. IEEE Access. 2022;10:18544–18556. https://doi.org/10.1109/ACCESS.2022.3151172

[17] Khan HA, Zuhaib M, Rihan M. Voltage fluctuation mitigation with coordinated OLTC and energy storage control in high PV penetrating distribution network. Electric Power Systems Research. 2022;208:107924. https://doi.org/10.1016/j.epsr.2022.107924

[18] Queiroz H, Amaral Lopes R, Martins J. Automated energy storage and curtailment system to mitigate distribution transformer aging due to high renewable energy penetration. Electric Power Systems Research. 2020;182:106199. https://doi.org/10.1016/j.epsr.2020.106199

[19] Nassif AB, Dong M. Characterizing the effect of conservation voltage reduction on the hosting capacity of inverter-based distributed energy resources. Electronics. 2020;9:1517. https://doi.org/10.3390/electronics9091517

[20] Wang B, Zhang C, Dong ZY, Li X. Improving hosting capacity of unbalanced distribution networks via robust allocation of battery energy storage systems. IEEE Transactions on Power Systems. 2021;36(3):2174–2185. https://doi.org/10.1109/TPWRS.2020.3029532

[21] Taheri S, Jalali M, Kekatos V, Tong L. Fast probabilistic hosting capacity analysis for active distribution systems. IEEE Transactions on Smart Grid. 2021;12:2000–2012. https://doi.org/10.1109/TSG.2020.3038651

[22] Qammar N, Arshad A, Miller RJ, Mahmoud K, Lehtonen M. Machine learning based hosting capacity determination methodology for low voltage distribution networks. IET Generation, Transmission & Distribution. 2024;18(5):911–920. https://doi.org/10.1049/gtd2.12933

[23] Valova R, Brown G. Distributed energy resource interconnection: An overview of challenges and opportunities in the United States. Solar Compass. 2022;2:100021. https://doi.org/10.1016/j.solcom.2022.100021

[24] Nahas EW, Mansour DA, Abd el-Ghany HA, Dawoud SM, Azmy AM. A novel IoT-based adaptive protection scheme for active DC distribution systems incorporating networked microgrids. Electric Power Systems Research. 2025;238:111113. https://doi.org/10.1016/j.epsr.2024.111113

[25] Aref M, Mossa MA, Abdelkarim E, Sayed K, Almalki MM, Ali AFM. Enhancement of the operating time of the overcurrent relay of the distribution network with high-level penetration of renewable energy sources. Results in Engineering. 2025;26:104859. https://doi.org/10.1016/j.rineng.2025.104859

[26] Bajaj M, Singh AK, Alowaidi M, Sharma NK, Sharma SK, Mishra S. Power quality assessment of distorted distribution networks incorporating renewable distributed generation systems based on the analytic hierarchy process. IEEE Access. 2020;8:145713–145737. https://doi.org/10.1109/ACCESS.2020.3014288

[27] Li H, Lekic A, Li S, Jiang D, Guo Q, Zhou L. Distribution network reconfiguration considering the impacts of local renewable generation and external power grid. IEEE Transactions on Industry Applications. 2023;59(6):7771–7788. https://doi.org/10.1109/TIA.2023.3307070

[28] Almalaq A, Alqunun K, Refaat MM, Farah A, Benabdallah F, Ali ZM, et al. Towards increasing hosting capacity of modern power systems through generation and transmission expansion planning. Sustainability. 2022;14:2998. https://doi.org/10.3390/su14052998

[29] Alhaider MM, Abdel Aleem SHE, Ali ZM, Zobaa AM. Harmonics management and hosting capacity enhancement: Optimal double-resistor damped double-tuned power filter with artificial hummingbird optimization. PLOS ONE. 2024;19:e0303207. https://doi.org/10.1371/journal.pone.0303207

[30] Varetsky Y, Fedorczak-Cisak M, Kushka B. Studying voltage fluctuations in the MV distribution grid with a renewable energy source. Energies. 2025;18:4217. https://doi.org/10.3390/en18164217

@article{1723954,
      author = {Salim Ullah},
      title = {Integration of Distributed Solar Energy into Saudi Smart Distribution Grids: Voltage Regulation, Hosting Capacity and Protection Challenges},
      journal = {Iconic Research And Engineering Journals},
      year = {2026},
      volume = {10},
      number = {4},
      pages = {1700-1714},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1723954.pdf},
      abstract = {The deployment of distributed solar photovoltaic generation is leading Saudi Arabia's distribution networks to move from a primarily one-way arrangement to a more actively managed system in which power, voltage and fault current can change direction at various stages of operation. This study looks at the technical integration of distributed solar energy into Saudi smart distribution grids by considering three closely related areas: voltage regulation, hosting capacity and protection. Synthetic data from 2020 to 2025 is examined with particular regard to the specific circumstances in Saudi Arabia, the latest grid-connection requirements, international research on distribution networks and advanced control techniques. The review argues that it is not feasible to control photovoltaic penetration by means of a single static capacity limit because the limiting factor varies according to the feeder impedance, the level of load coincidence, inverter behaviour, network topology, weather conditions, protection settings and the available flexibility. Even though smart inverters, on-load tap changers that are coordinated, battery storage, demand response and data-driven hosting-capacity tools can increase the amount of power that the network is able to take in, the benefits of these measures depend on interoperable settings and protection-aware operation. There are also additional design problems in Saudi Arabia due to high levels of irradiance, temperature, dust, the concentration of solar generation during the midday and the rapid growth in distributed resources. It is therefore proposed that a comprehensive planning framework be adopted in which the voltage, thermal, power quality and protection limits are jointly assessed across time-series scenarios, following which coordinated control and adaptive protection are put into place. The review also points out key areas that require further research, namely feeder-level data from Saudi Arabia, probabilistic hosting capacity, the interaction between inverters and protection systems, digital monitoring and field validation.},
      month = {October},
  }