Modular Model Order Reduction for Inverter-Based Power Systems with Stability and Accuracy Guarantees

Hanqing Zhang; Pudong Ge; Mohammad Fahim Shakib; Adrià Junyent-Ferré; Balarko Chaudhuri; Luuk Poort; Lars A. L. Janssen; Giordano Scarciotti

arXiv · 2610.02477

Modular Model Order Reduction for Inverter-Based Power Systems with Stability and Accuracy Guarantees

Hanqing Zhang·Pudong Ge·Mohammad Fahim Shakib·Adrià Junyent-Ferré·Balarko Chaudhuri·Luuk Poort·Lars A. L. Janssen·Giordano Scarciotti

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Abstract

This paper proposes a modular model order reduction framework for large-scale power grids integrated with renewable energy sources. The proposed framework has the advantage of reducing individual sub-areas independently while retaining the power grid interconnection structure. Moreover, given a user-defined accuracy specification on the overall reduced-order interconnected power grid, corresponding target specifications for the individual reduced sub-areas are determined: satisfaction of such individual specifications guarantees the overall user-defined accuracy specification, while also preserving the stability of the overall reduced-order interconnected power grid. The proposed framework is validated on a modified IEEE 118-bus system (where synchronous generators have been replaced by inverter-based resources) by assessing the accuracy specification satisfaction of the overall reduced-order interconnected power grid, in terms of frequency response, stability, active power, and sub-synchronous behaviour when injected with disturbances.

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Hanqing Zhang, Pudong Ge, Mohammad Fahim Shakib, Adrià Junyent-Ferré, Balarko Chaudhuri, Luuk Poort, Lars A. L. Janssen, Giordano Scarciotti. 2026-10-01. Modular Model Order Reduction for Inverter-Based Power Systems with Stability and Accuracy Guarantees. https://arxiv.org/abs/2610.02477

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