Work

Dynamic similarity analysis for active distribution grid equivalents

Year: 2026

Type: article

Abstract: The increasing share of inverter-based resources (IBRs) has reshaped distribution–transmission dynamics. Capturing their fast control interactions via electromagnetic transient (EMT) simulations are computationally demanding, necessitating effective aggregation and reduction methods for grid equivalents. This work proposes novel network reduction techniques and a sophisticated methodology to assess the dynamic similarity of grid equivalents. The aggregation techniques involve an iterative process employing Kron reduction and an optimisation-based approach. The validation of the dynamic similarity of the aggregated models is based on time and frequency domain. The resulting reduced networks enable the incorporation of the network system dynamics into large-scale system studies in a computationally efficient way. The proposed methodologies were tested in a case study and their appropriateness was verified. This has the potential to improve study results for appropriate power system planning and operation.

Source: Electric Power Systems Research

DOI: 10.1016/j.epsr.2026.113628

Authors: Nicolas Murillo, Joel Schindler, Onur Alican, Jaume Girona-Badia, Marc Cheah Mañe, Oriol Gomis-Bellmunt

Institution: Universitat Politècnica de Catalunya

Language: English

Topic: Power System Optimization and Stability

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $2,810