RMS Modeling and Control of a Grid-Forming E-STATCOM for Power System Stability in Isolated Grids
Source abstract
Abstract
This paper presents a comprehensive RMS-based phasorial model of an E-STATCOM with grid-forming (GFM) control, designed to improve power system stability in isolated grids. Unlike previous approaches, this model integrates a governor with an internal power system stabilizer (PSS) and an active current limiter (ACL) to enhance frequency regulation and mitigate oscillations. Additionally, an exciter with a nonlinear modulation function is introduced to optimize voltage regulation and reactive power support. A detailed conventional supercapacitor (SC) model is also incorporated, enabling dynamic DC-voltage control based on active power variations, improving frequency stability. The proposed E-STATCOM RMS model includes algebraic equations, dynamic governor and exciter models, supercapacitor-based energy storage control, and an advanced current-limiting strategy. Simulations are conducted on the Fuerteventura–Lanzarote (Canary Islands, Spain) power system, comparing the E-STATCOM with a synchronous condenser (SynCon) in frequency response, voltage regulation, and fault performance. The results show that the E-STATCOM improves frequency stabilization and energy efficiency while complying with grid codes. This study introduces a novel RMS-based modeling approach for GFM E-STATCOMs, bridging the gap between theoretical phasorial analysis and real-world applications. The findings confirm that E-STATCOMs are a viable alternative to SynCons, enhancing grid stability in high-renewable-penetration systems.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Power System Optimization and Stability · Microgrid Control and Optimization · HVDC Systems and Fault Protection
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Electrical Engineering Department, Universidad Carlos III de Madrid, 28005 Madrid, Spain
Funding
Spanish Research Agency (AEI) · NextGenerationEU/PRTR · European Union “NextGenerationEU/PRTR”
References (39)
Show source-provided references
1. IRENA (2023). Renewable Energy Statistics 2023, International Renewable Energy Agency.
2. The relevance of inertia in power systems10.1016/j.rser.2015.11.016 ↗
3. A Future with Inverter-Based Resources: Finding Strength from Traditional Weakness
4. Virtual synchronous generator versus synchronous condensers: An electromagnetic transient simulation-based comparison
5. STATCOM Technology Evolution for Tomorrow’s Grid: E-STATCOM, STATCOM with Supercapacitor-Based Active Power Capability10.1109/MPE.2022.3230969 ↗
6. Meng, L., Heydari, R., Bai, H., Hasler, J., Ingestrom, G., Kheir, J., Owens, A., and Svensson, J. (September, January 28). Energy storage enhanced STATCOM for secure and stable power grids. Proceedings of the CIGRE Proceeding, Paris, France.
7. Hitachi-Energy (2023). SVC Light Enhanced, Hitachi Energy Agency.
8. Netztransparenz-News (2025, March 07). Notwendigkeit der Entwicklung Netzbildender STATCOM-Anlagen. Available online: https://www.netztransparenz.de/de-de/%C3%9Cber-uns/Studien-und-Positionspapiere/Positionspapier-Notwendigkeit-der-Entwicklung-netzbildender-STATCOM-Anlagen-08122020.
9. S2-Grupo (2023). ViSync Project, S2-Grupo. Available online: https://s2grupo.es/proyectos/visync/.
10. Jalali, A. (2023). Voluntary Specification for Grid-Forming Inverters-May 2023-A Statement of Voluntary Threshold, Australian Energy Market Operator-AEMO.
11. Energy-Storage-Resources-LLC (2024). Kapolei Energy Storage Project, Energy-Storage-Resources-LLC.
12. Energy-Storage Enhanced STATCOMs for Wind Power Plants10.1109/MPEL.2023.3273893 ↗
13. NERC (2023). White Paper: Grid Forming Functional Specifications for BPS-Connected Battery Energy Storage Systems, North American Electric Reliability Corporation.
14. Grid Forming Inverter Modeling, Control, and Applications10.1109/ACCESS.2021.3104617 ↗
15. Grid Forming Converters in Renewable Energy Sources Dominated Power Grid: Control Strategy, Stability, Application, and Challenges10.35833/MPCE.2021.000257 ↗
16. Unified Virtual Oscillator Control for Grid-Forming and Grid-Following Converters10.1109/JESTPE.2020.3025748 ↗
17. Grid-Forming Control of Voltage Source Converters Based on the Virtual-Flux Orientation10.1109/ACCESS.2023.3240516 ↗
18. Dolado Fernández, J., Eloy-Garcia, J., Arnaltes, S., and Rodríguez-Amenedo, J.L. (2023). Sequence Control Strategy for Grid-Forming Voltage Source Converters Based on the Virtual-Flux Orientation under Balanced and Unbalanced Faults. Energies, 16.10.3390/en16073056 ↗
19. Reactive Power Synchronization Method for Voltage-Sourced Converters10.1109/TSTE.2019.2911453 ↗
20. Grid-Forming Converters Control Based on the Reactive Power Synchronization Method for Renewable Power Plants10.1109/ACCESS.2021.3078078 ↗
21. Critical Clearing Time Determination and Enhancement of Grid-Forming Converters Embedding Virtual Impedance as Current Limitation Algorithm10.1109/JESTPE.2019.2959085 ↗
22. A DQ-Frame Asymmetrical Virtual Impedance Control for Enhancing Transient Stability of Grid-Forming Inverters10.1109/TPEL.2021.3124286 ↗
23. Grid-Forming Controller Based on Virtual Admittance for Power Converters Working in Weak Grids10.1109/JESTIE.2023.3244744 ↗
24. Qoria, T., Gruson, F., Colas, F., Guillaud, X., Debry, M.S., and Prevost, T. (2018, January 11–15). Tuning of Cascaded Controllers for Robust Grid-Forming Voltage Source Converter. Proceedings of the 2018 Power Systems Computation Conference (PSCC), Dublin, Ireland.10.23919/PSCC.2018.8443018 ↗
25. ENTSO-News (2025, March 07). Stability Management in Power Electronics Dominated Systems: A Prerequisite to the Success of the Energy Transition. Available online: https://eepublicdownloads.azureedge.net/clean-documents/Publications/Position%20papers%20and%20reports/220616_entso-e_pp_stability_management.pdf.
26. National-Grid-ESO-Code (2025, March 07). GC0137: Minimum Specification Required for Provision of GB Grid Forming (GBGF) Capability (Formerly Virtual Synchronous Machine/VSM Capability). Available online: https://www.neso.energy/industry-information/codes/gc/modifications/gc0137-minimum-specification-required-provision-gb-grid-forming-gbgf-capability-formerly-virtual-synchronous-machinevsm-capability.
27. VDE-FNN (2021). FNN Guideline-Grid-Forming & System-Supporting Behaviour of Power-Generating Modules, VDE-FNN.
28. CENELEC (2022). CLC/TC 8X/WG 03-Requirements for Connection of Generators to Distribution Networks, CENELEC.
29. NERC (2021). White Paper:Grid Forming Technology Bulk Power System Reliability Considerations, NERC.
30. ESIG-ENERGY (2022). Grid-Forming Technology in Energy Systems Integration, ESIG-ENERGY.
31. Netztransparenz-Standar (2025, March 07). Standard Design of E-STATCOM of the German TSO. Available online: https://www.netztransparenz.de/xspproxy/api/staticfiles/ntp-relaunch/dokumente/systemdienstleistungen/spannungshaltung/blindleistung/einheitliche%20auslegung%20von%20e-statcom/e-statcom-kennzahlennetztransparenz_freigegeben_en.pdf.
32. Comparative Modelling and Analysis of EMT and Phasor RMS Grid-Forming Converters Under Different Power System Dynamics10.1109/TIA.2023.3339108 ↗
33. Grid-forming converters: Sufficient conditions for RMS modeling10.1016/j.epsr.2021.107324 ↗
34. Kundur, P., Balu, N., and Lauby, M. (1994). Power System Stability and Control, McGraw-Hill Education.
35. Mohan, N., Undeland, T., and Robbins, W. (1989). Power Electronics: Converters, Applications and Design, Wiley.
36. Ministerio para la Transición Ecológica y el Reto Demográfico (2022). Plan de Desarrollo de la Red de Transporte de Energía Eléctrica 2021–2026.
37. Modeling of synchronous generators in power system studies
38. Anderson, P., and Fouad, A. (2008). Power System Control and Stability, Wiley India Pvt. Limited. [2nd ed.].
39. D’Arco, S., Suul, J.A., and Fosso, O.B. (2013, January 15–19). Control system tuning and stability analysis of Virtual Synchronous Machines. Proceedings of the 2013 IEEE Energy Conversion Congress and Exposition, Denver, CO, USA.10.1109/ECCE.2013.6647045 ↗