Fortifying Renewable-Dominant Hybrid Microgrids: A Bi-Directional Converter Based Interconnection Planning Approach

Zipeng Liang , C.Y. Chung , Qin Wang , Haoyong Chen , Haosen Yang , Chenye Wu

Engineering ›› 2025, Vol. 51 ›› Issue (8) : 130 -143.

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Engineering ›› 2025, Vol. 51 ›› Issue (8) : 130 -143. DOI: 10.1016/j.eng.2025.02.020
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Fortifying Renewable-Dominant Hybrid Microgrids: A Bi-Directional Converter Based Interconnection Planning Approach

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Abstract

Interconnection planning involving bi-directional converters (BdCs) is crucial for enhancing the reliability and robustness of hybrid alternating current (AC)/direct current (DC) microgrid clusters with high penetrations of renewable energy resources (RESs). However, challenges such as the non-convex nature of BdC efficiency and renewable energy uncertainty complicate the planning process. To address these issues, this paper proposes a tri-level BdC-based planning framework that incorporates dynamic BdC efficiency and a data-correlated uncertainty set (DcUS) derived from historical data patterns. The proposed framework employs a least-squares approximation to linearize BdC efficiency and constructs the DcUS to balance computational efficiency and solution robustness. Additionally, a fully parallel column and constraint generation algorithm is developed to solve the model efficiently. Numerical simulations on a practical hybrid AC/DC microgrid system demonstrate that the proposed method reduces interconnection costs by up to 21.8% compared to conventional uncertainty sets while ensuring robust operation under all considered scenarios. These results highlight the computational efficiency, robustness, and practicality of the proposed approach, making it a promising solution for modern power systems.

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Hybrid alternating current/direct current microgrid / Interconnection planning / Bi-directional converter / Solar power uncertainty

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Zipeng Liang, C.Y. Chung, Qin Wang, Haoyong Chen, Haosen Yang, Chenye Wu. Fortifying Renewable-Dominant Hybrid Microgrids: A Bi-Directional Converter Based Interconnection Planning Approach. Engineering, 2025, 51(8): 130-143 DOI:10.1016/j.eng.2025.02.020

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