HUANG Hua,XUE Feng,WU Xuelian,et al.Robust optimal scheduling strategy for DC microgrids based on fictitious nodal demand equivalence[J].ZHEJIANG ELECTRIC POWER,2026,45(07):113-123.
HUANG Hua,XUE Feng,WU Xuelian,et al.Robust optimal scheduling strategy for DC microgrids based on fictitious nodal demand equivalence[J].ZHEJIANG ELECTRIC POWER,2026,45(07):113-123.DOI: 10.19585/j.zjdl.202607011.
Robust optimal scheduling strategy for DC microgrids based on fictitious nodal demand equivalence
To improve the energy efficiency and operational reliability of DC microgrids (MGs), it is essential to fully account for the impact of renewable energy output uncertainty on system operation. To address limitations of existing scheduling methods, which often neglect network constraints or suffer from excessive model complexity, this paper proposes a robust optimal scheduling strategy for DC MGs that incorporates both node voltage and branch power flow constraints. First, an optimal power flow model for DC MGs incorporating network losses and node voltages is established and efficiently solved by transforming it into a linear model using fictitious nodal demand (FND) iteration method. To handle photovoltaic output uncertainty, a robust optimization framework is further developed that coordinating the baseline output of units with real-time participation factors, ensuring voltage security under worst-case power fluctuation scenarios. Finally, simulations on a 33-node DC MG system demonstrate that the FND-based robust optimization model effectively prevents voltage limit violations while maintaining both economic performance and robustness, thereby validating the effectiveness of the proposed strategy.
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