Maximized Autonomous Economic Operation and Aggregated Equivalence for Microgrids with PVs and ESSs

Zhiwei Wang, Shumin Sun (), Yan Cheng, Peng Yu, Jiawei Xing, Wanting Shen and Jinquan Zhao
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Zhiwei Wang: State Grid Shandong Electric Power Research Institute, Jinan 250003, China
Shumin Sun: State Grid Shandong Electric Power Research Institute, Jinan 250003, China
Yan Cheng: State Grid Shandong Electric Power Research Institute, Jinan 250003, China
Peng Yu: State Grid Shandong Electric Power Research Institute, Jinan 250003, China
Jiawei Xing: State Grid Shandong Electric Power Research Institute, Jinan 250003, China
Wanting Shen: College of Electrical Engineering, Shanghai University of Electric Power, Yangpu District, Shanghai 200090, China
Jinquan Zhao: College of Electrical Engineering, Shanghai University of Electric Power, Yangpu District, Shanghai 200090, China

Energies, 2025, vol. 18, issue 21, 1-21

Abstract: With the rapid development of renewable energy, more microgrids integrating photovoltaics and energy storage systems (MGPEs) have been deployed. Frequent grid faults have consequently increased the likelihood of MGPEs operating in off-grid mode, highlighting the need to maximize their autonomous operation. This paper proposes an optimal day-ahead scheduling method, which aims to maximize autonomous economic operation and minimize dependence on the main grid. Based on the autonomous results, the internal resources of MGPEs are aggregated into an equivalent power unit (EPU) and an aggregated energy storage system (AESS). The aggregated demands and residual capabilities of these aggregated models are then quantified, thereby facilitating coordinated scheduling by the main grid. Compared with traditional cost-optimization approaches, this case study shows that the proposed method reduces the daily outage probability of MGPEs by at least 24.9%.

Keywords: microgrid with photovoltaic and energy storage systems (MGPE); autonomous economic operation (AEO); aggregated equivalence (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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