SHORT-TERM BALANCE MARGIN ENHANCEMENT METHOD OF POWER SYSTEM BASED ON VARIABLE TIME SCALES AND TWO-STAGE ROBUST OPTIMIZATION

Ren Qiangyu; Wang Jianxue; Yang Qian; Guo Jincheng; Qi Jie; Zhang Yao

doi:10.19912/j.0254-0096.tynxb.2025-0034

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (5) : 156-166. DOI: 10.19912/j.0254-0096.tynxb.2025-0034

SHORT-TERM BALANCE MARGIN ENHANCEMENT METHOD OF POWER SYSTEM BASED ON VARIABLE TIME SCALES AND TWO-STAGE ROBUST OPTIMIZATION

Ren Qiangyu, Wang Jianxue, Yang Qian, Guo Jincheng, Qi Jie, Zhang Yao

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Abstract

To address the issue of inadequate short-term power balance sufficiency in high-proportion renewable energy power system, a method for enhancing power system balance margin based on variable time scales and two-stage robust optimization is proposed. Considering the uncertainties of renewable energy and load, a two-stage robust optimization model for power balance analysis is established. The model developed short-term hour-level and ultra-short-term minute-level balances at variable time scales. Taking into account the coal quality differences of thermal power units during different periods, a refined model of the operational characteristics of thermal power units is developed. A balance margin early warning and enhancement system centered on short-term balance margin is constructed. Flexible resources are utilized through hierarchical and classified allocation to enhance the short-term power balance margin. The results of case studies demonstrate that the proposed method can effectively improve system balance adequacy, enhance the robustness to renewable energy and load fluctuations and strengthen the power supply capability during peak load periods.

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renewable energy / uncertainty analysis / two-stage robust optimization / coal preparation / variable time scales / flexible resources

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Ren Qiangyu, Wang Jianxue, Yang Qian, Guo Jincheng, Qi Jie, Zhang Yao. SHORT-TERM BALANCE MARGIN ENHANCEMENT METHOD OF POWER SYSTEM BASED ON VARIABLE TIME SCALES AND TWO-STAGE ROBUST OPTIMIZATION[J]. Acta Energiae Solaris Sinica. 2026, 47(5): 156-166 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0034

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