An Interface Method for Co-simulation of EMT Model and Shifted Frequency EMT Model Based on Rotational Invariance Techniques

TL;DR

This paper introduces a new interface method that enables efficient co-simulation of electromagnetic transient models and shifted frequency models using rotational invariance techniques, improving simulation performance for ac grids.

Contribution

A novel interface for co-simulation of EMT and SFEMT models is proposed, utilizing rotational invariance techniques to enhance simulation efficiency and accuracy.

Findings

The proposed method effectively couples EMT and SFEMT models.

Test results confirm improved computational efficiency.

Theoretical analysis validates the method's effectiveness.

Abstract

The shifted frequency-based electromagnetic transient (SFEMT) simulation has greatly improved the computational efficiency of traditional electromagnetic transient (EMT) simulation for the ac grid. This letter proposes a novel interface for the co-simulation of the SFEMT model and the traditional EMT model. The general form of SFEMT modeling and the principle of analytical signal construction are first derived. Then, an interface for the co-simulation of EMT and SFEMT simulation is proposed based on rotational invariance techniques. Theoretical analyses and test results demonstrate the effectiveness of the proposed method.