Optimal Scheduling of Power Systems with High Proportions of Renewable Energy Accounting for Operational Flexibility

Yi Lin, Wei Lin (), Wei Wu and Zhenshan Zhu
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Yi Lin: State Grid Fujian Economic Research Institute, Fuzhou 350011, China
Wei Lin: State Grid Fujian Economic Research Institute, Fuzhou 350011, China
Wei Wu: State Grid Fujian Economic Research Institute, Fuzhou 350011, China
Zhenshan Zhu: College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China

Energies, 2023, vol. 16, issue 14, 1-18

Abstract: The volatility and uncertainty of high-penetration renewable energy pose significant challenges to the stability of the power system. Current research often fails to consider the insufficient system flexibility during real-time scheduling. To address this issue, this paper proposes a flexibility scheduling method for high-penetration renewable energy power systems that considers flexibility index constraints. Firstly, a quantification method for flexibility resources and demands is introduced. Then, considering the constraint of the flexibility margin index, optimization scheduling strategies for different time scales, including day-ahead scheduling and intra-day scheduling, are developed with the objective of minimizing total operational costs. The intra-day optimization is divided into 15 min and 1 min time scales, to meet the flexibility requirements of different time scales in the power system. Finally, through simulation studies, the proposed strategy is validated to enhance the system’s flexibility and economic performance. The daily operating costs are reduced by 3.1%, and the wind curtailment rate is reduced by 4.7%. The proposed strategy not only considers the economic efficiency of day-ahead scheduling but also ensures a sufficient margin to cope with the uncertainty of intra-day renewable energy fluctuations.

Keywords: hydrogen energy storage; battery energy storage; renewable energy; flexibility index; optimal scheduling (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: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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