Static Voltage Stability Analysis of Renewable Energy Multi-Infeed Systems Based on Margin Index

Substituting a high proportion of renewable energy sources for traditional synchronous generators can lead to a deterioration in the system's static voltage stability. This paper proposes extending margin-based voltage stability indices based on the load side Thevenin equivalent, to the renewab...

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Bibliographic Details
Published in2024 IEEE 7th International Electrical and Energy Conference (CIEEC) pp. 787 - 794
Main Authors Tang, Hao, Xu, Ying, YI, Zhongkai, Li, Zhanfei, Li, Zhimin, Xu, Jianing, Zheng, Kaize
Format Conference Proceeding
LanguageEnglish
Published IEEE 10.05.2024
Subjects
Accuracy
Closed box
margin index
renewable energy multi-infeed system
Renewable energy sources
Sensitivity
Stability criteria
static voltage stability
Synchronous generators
Thevenin equivalent
Voltage
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Summary:Substituting a high proportion of renewable energy sources for traditional synchronous generators can lead to a deterioration in the system's static voltage stability. This paper proposes extending margin-based voltage stability indices based on the load side Thevenin equivalent, to the renewable energy source side for assessing the static voltage stability of renewable energy multi-infeed systems. Firstly, a comprehensive analysis of both the load and renewable energy sources is conducted, and normalized expressions for three margin indices are derived based on a single-machine black-box system. Secondly, the characteristics of the margin indices are analyzed, validating their applicability in a single-infeed system. Thirdly, a method is introduced for conducting static stability analysis on the renewable energy source side of multi-infeed systems using Thevenin equivalent. Finally, the effectiveness of the indices under different growth scenarios is verified in a modified IEEE 39-node system, expanding the application scenarios of these indices.
DOI:10.1109/CIEEC60922.2024.10583313