OPTIMAL DISPATCH OF WIND/THERMAL/PUMPED STORAGE SYSTEM CONSIDERING IMPACT OF WIND POWER UNCERTAINTY ON PUMPING/GENERATION STATES

Li Shenghu; Ding Zhen; Xia Weijian; Liu Chaoyue

doi:10.19912/j.0254-0096.tynxb.2024-2022

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 194-202. DOI: 10.19912/j.0254-0096.tynxb.2024-2022

OPTIMAL DISPATCH OF WIND/THERMAL/PUMPED STORAGE SYSTEM CONSIDERING IMPACT OF WIND POWER UNCERTAINTY ON PUMPING/GENERATION STATES

Li Shenghu, Ding Zhen, Xia Weijian, Liu Chaoyue

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Abstract

To regulate PSU output in response to wind power output fluctuations, an optimization model for wind-thermal-pumped storage systems is proposed based on the sensitivity of equivalent pump-generation duration （PGD） of pumped storage units （PSU） with respect to wind power uncertainty. Firstly, a polyhedral uncertainty set is used to describe wind power uncertainty, and an optimal dispatch model for wind/thermal/pumped storage systems is established. Secondly, an analytical expression of the sensitivity of PGD with respect to wind power uncertainty is proposed to obtain PGD adjustments. Finally, using upper reservoir capacity change as an intermediate variable, the relationship between PGD and power adjustment is newly derived to adjust PSU according to wind power prediction deviation. Case study results verify that the proposed model improves system flexibility capacity and PSU utilization while ensuring system economics.

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wind power / optimal scheduling / sensitivity analysis / wind/thermal/pumped storage system / pumped storage unit / pump-generation duration

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Li Shenghu, Ding Zhen, Xia Weijian, Liu Chaoyue. OPTIMAL DISPATCH OF WIND/THERMAL/PUMPED STORAGE SYSTEM CONSIDERING IMPACT OF WIND POWER UNCERTAINTY ON PUMPING/GENERATION STATES[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 194-202 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2022

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