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Seamless mode switching control strategy for SOP interconnected microgrids with EVs cluster
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  • Jie Wang,
  • Wentao Huang,
  • Nengling Tai,
  • Canbing Li,
  • Mengyuan Wang,
  • Liangxiu Wang
Jie Wang
Shanghai Jiao Tong University
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Wentao Huang
Shanghai Jiao Tong University

Corresponding Author:hwt8989@sjtu.edu.cn

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Nengling Tai
Shanghai Jiao Tong University
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Canbing Li
Shanghai Jiao Tong University
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Mengyuan Wang
Shanghai Jiao Tong University
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Liangxiu Wang
Shanghai Engineering Research Center of Intelligent Ship Integrated Power System
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Abstract

In interconnected microgrids, the control method for Soft Open Point (SOP) dynamically switches from PQ to Uf control after fault incidents to preserve system stability. However, this mode switching induces frequency and voltage fluctuations, jeopardizing the operational stability of distributed generations (DGs). This paper presents a seamless mode switching control strategy specifically tailored for SOP-based interconnected microgrids incorporating Electric Vehicle (EV) clusters. We investigate the fluctuations and transient impacts associated with emergency control switching and propose a decentralized Virtual Synchronous Generator (VSG) control strategy for energy storage systems. This strategy factors in the State of Charge (SOC) of batteries to mitigate imbalances between source and load during switching delays. Additionally, we introduce a seamless switching method encompassing collaborative phase angle compensation, control mode transition, and pre-synchronization techniques to minimize transient disturbances. Validation through PSCAD/EMTDC simulations and RT-LAB experiments shows effective suppression of fluctuations and transient impacts, thus enabling seamless mode switching in interconnected microgrids.
19 Oct 2023Submitted to IET Generation, Transmission & Distribution
30 Oct 2023Submission Checks Completed
30 Oct 2023Assigned to Editor
01 Nov 2023Review(s) Completed, Editorial Evaluation Pending
06 Nov 2023Reviewer(s) Assigned