Robust H∞ Based Virtual Synchronous Generators for Low Inertial Microgrids Considering High Penetration of Renewable Energy

Fossil-based generators are phasing out in favor of Renewable-Based Sources (RESs), impacting the generation mix and causing low inertia levels. In this regard, this paper presents a static output feedback H ∞ based virtual synchronous generator to regulate the frequency of low inertial microgrids d...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2024-09, p.1-12
Main Authors: Alotaibi, Ibrahim, Abido, Mohammad
Format: Article
Language:English
Subjects:
Affordable and Clean Energy
Battery Energy Storage Syste
Control design
Low Inertial Microgrids
Microgrids
Power system dynamics
Power system stability
Renewable energy sources
Robust H<sub xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">∞ Virtual Synchronous Generators
Sustainable Cities and Communities
Uncertainty
Voltage control
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Summary:Fossil-based generators are phasing out in favor of Renewable-Based Sources (RESs), impacting the generation mix and causing low inertia levels. In this regard, this paper presents a static output feedback H ∞ based virtual synchronous generator to regulate the frequency of low inertial microgrids dominated by inertia-less (RESs). The control strategy addresses the uncertainty of power system inertia, stochasticity of RESs, and demand volatility. Also, the proposed static H∞ replaces the dynamic H ∞ control that normally entails complexity and impracticality. Previous development on dynamic H ∞ control, which entails complexity and impracticality, is replaced by a simple and static H ∞ counterpart that achieves the same control objectives, offering seamless implementation and minimal computational burden. Using Lyapunov theories and Linear Matrix Inequalities, the dynamics of the microgrids are transformed into a set of uncertain polytopic systems. A convex optimization model is developed to tune the controller that optimizes microgrid operation over the entire uncertain region. A multi-step verification method on a realistic testbed comprising conventional and RES-based units showcases the robustness of the control design against extreme grid disruptions and multiple RES injections. Conducting a Real-time simulation with RTDS technologies to validate the control design concludes the paper.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2024.3457947