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Small-signal Equivalent Modelling Method of a Multi-type Renewable Energy Collecting System Based on Matrix Partitioned Similarity Transformation
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Xiao WANG1, Wenkai DONG2, Linlin WU1, Yamin SUN1, Tianyu SU1, Xiaorong XIE2
Journal of Power Supply | 2026, 24(5) : 189 - 197
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Journal of Power Supply | 2026, 24(5): 189-197
• Power Electronic Dominated Power Systems •
Small-signal Equivalent Modelling Method of a Multi-type Renewable Energy Collecting System Based on Matrix Partitioned Similarity Transformation
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Xiao WANG1, Wenkai DONG2, Linlin WU1, Yamin SUN1, Tianyu SU1, Xiaorong XIE2
Affiliations
  • 1.North China Electric Power Research Institute Co., Ltd., Beijing 100045, China
  • 2.State Key Laboratory of Power System Operation and Control (Tsinghua University), Beijing 100084, China
Published: 2026-05-30 doi: 10.13234/j.issn.2095-2805.2026.5.189
Outline
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In a renewable power collecting system, the number of generators is large, the network topology is complex, and the combination of operating conditions is various, which makes the small-signal stability analysis of the system inefficient and the equivalent modelling difficult. Thus, a small-signal equivalent modelling method of the multi-type renewable energy collecting system is proposed based on partitioned similarity transformation of the transfer function matrix of the generators and the network. First, by combining the models of generators and the network equation of the system, a detailed model of the renewable power collecting system is obtained. Second, considering that the system can be divided into several groups in which dynamics of the generators are approximately the same, via the partitioned equivalent decoupling and order reduction, a single-machine equivalent model is established for each group and hence a multi-machine equivalent model for the system is obtained. Finally, the effectiveness of the proposed method is verified via case studies. The method proposed can deal with the differences of dynamics of the generators and the complex network topology and also effectively reduce the computational burden of the small-signal stability analysis.

Renewable power collecting system  /  equivalent model  /  small-signal stability
王潇, 董文凯, 吴林林, 孙雅旻, 苏田宇, 谢小荣. 基于矩阵相似变换的多类型新能源汇集系统小信号等值建模方法. 电源学报, 2026 , 24 (5) : 189 -197 . DOI: 10.13234/j.issn.2095-2805.2026.5.189
Xiao WANG, Wenkai DONG, Linlin WU, Yamin SUN, Tianyu SU, Xiaorong XIE. Small-signal Equivalent Modelling Method of a Multi-type Renewable Energy Collecting System Based on Matrix Partitioned Similarity Transformation[J]. Journal of Power Supply, 2026 , 24 (5) : 189 -197 . DOI: 10.13234/j.issn.2095-2805.2026.5.189
Funding
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  • North China Electric Power Research Institute Co. Ltd.(KJZ2022056)
  • National Natural Science Foundation of China(51925701)
Appendix
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Year 2026 volume 24 Issue 5
50
13
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.5.189
  • Receive Date：2024-04-02
  • Online Date：2026-10-29
  • Published：2026-05-30
Article Data
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History
  • Received：2024-04-02
  • Revised：2024-05-29
  • Accepted：2024-06-18
Funding
North China Electric Power Research Institute Co. Ltd.(KJZ2022056)
National Natural Science Foundation of China(51925701)
Affiliations
    1.North China Electric Power Research Institute Co., Ltd., Beijing 100045, China
    2.State Key Laboratory of Power System Operation and Control (Tsinghua University), Beijing 100084, China
References
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https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2026.5.189
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