DAY-AHEAD AND INTRA-DAY OPTIMAL SCHEDULING OF MULTI-ENERGY POWER SYSTEMS CONSIDERING DYNAMIC FREQUENCY CONSTRAINTS

Li Yang; Sun Bin; Wu Feng; Hong Feilong; Shi Linjun; Lin Keman

doi:10.19912/j.0254-0096.tynxb.2023-0681

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (2) : 406-415. DOI: 10.19912/j.0254-0096.tynxb.2023-0681

DAY-AHEAD AND INTRA-DAY OPTIMAL SCHEDULING OF MULTI-ENERGY POWER SYSTEMS CONSIDERING DYNAMIC FREQUENCY CONSTRAINTS

Li Yang¹, Sun Bin², Wu Feng¹, Hong Feilong¹, Shi Linjun¹, Lin Keman¹

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Abstract

A coordinated optimal dispatch strategy for power system with wind power-pumped storage-battery storage is proposed considering dynamic frequency constraints. Firstly, the frequency response model of the power system including wind turbine, pumped storage units, and battery energy storage is established, the frequency regulation response process is approximated with piecewise linearization method to reduce the computational complexity. Secondly, considering ramping rates, start-stop constraints, power tracking ability of different regulation sources, a multi-time scale coordinated optimization framework including day-ahead stage and intra-day stage is established. The start-up and shutdown and output plans of thermal power units and pumped storage units considering dynamic frequency constraints are formulated in the day-ahead stage. In the intra-day dispatching stage, the charge and discharge state plan of battery energy storage is formulated, and the output plan of all units is adjusted to balance the power deviation to promote the consumption of wind power. Finally, a case study is conducted in a modified IEEE-39 node system to demonstrate the feasibility and effectiveness of the proposed model. The results show that the proposed method can improve the frequency stability of the system, promote the wind power accommodation, and give consideration to both power system economics and frequency stability.

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multi-energy power system / dynamic frequency constraint / multi-time scale / optimal dispatch

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Li Yang, Sun Bin, Wu Feng, Hong Feilong, Shi Linjun, Lin Keman. DAY-AHEAD AND INTRA-DAY OPTIMAL SCHEDULING OF MULTI-ENERGY POWER SYSTEMS CONSIDERING DYNAMIC FREQUENCY CONSTRAINTS[J]. Acta Energiae Solaris Sinica. 2024, 45(2): 406-415 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0681

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