Harmonic oscillation source identification-based stability improving method: Application to grid-connected inverters multi-infeed system

Jiayuan Gao; Shuai Huang; Binyan Li; X J Wang; Dikui Zhu; Fei Jiang; Chunming Tu

doi:10.1016/j.ijepes.2026.111952

May 1, 2026International Journal of Electrical Power & Energy SystemsOpen Access

Harmonic oscillation source identification-based stability improving method: Application to grid-connected inverters multi-infeed system

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Key Points

This research aims to identify harmonic oscillation sources in grid-connected inverter systems and improve their stability.
Constructed a current oscillation modal gain model for grid-connected inverter multi-infeed systems.
Developed an equivalent source-load model to analyze harmonic oscillation sources.
Analyzed system stability under varying grid impedances and proposed a method for stability improvement.
Successfully identified key harmonic oscillation sources affecting system stability.
Demonstrated that the proposed asymmetric impedance remodeling methods can effectively enhance stability.
Showed improved performance in stability at different grid impedance configurations.

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Implication

Identifies harmonic sources and improves stability in multi-infeed systems, suggesting new modeling approaches.

Abstract

• Construct the current oscillation modal gain model of GCI multi-infeed system. • Identify the harmonic oscillation source of GCI multi-infeed system. • Construct an equivalent ‘source-load’ model for harmonic oscillation sources. • Analyze the stability of GCI multi-infeed system under different grid impedances. • Propose the stability improvement method of asymmetric impedance remodeling.

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Gao et al. (2026) studied this question.

synapsesocial.com/papers/6a1bd2f35783ba022b6fe355 https://doi.org/10.1016/j.ijepes.2026.111952

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Harmonic oscillation source identification-based stability improving method: Application to grid-connected inverters multi-infeed system

Key Points

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Abstract

Discussion

Cite This Study

Harmonic oscillation source identification-based stability improving method: Application to grid-connected inverters multi-infeed system

Key Points

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Implication

Abstract

Discussion

Cite This Study

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