Energy storage load multi-stage frequency modulation method and system based on soc dynamic partitioning

Abstract

The application belongs to the technical field of frequency modulation management, and specifically discloses a multi-stage frequency modulation method and system for energy storage load based on SOC dynamic partitioning. The method divides historical power grid frequency data according to hourly granularity, merges time periods according to the similarity of statistical characteristics of adjacent hours, and differentially configures the SOC sub-domain boundary for different time periods, thereby realizing dynamic matching of energy storage control and power grid frequency modulation demand, enabling the SOC partition to dynamically perceive the fluctuation intensity of the power grid frequency, solving the adaptability problem of insufficient adjustment capacity or excessive response of the fixed partition strategy. At the same time, the current battery state of charge value is obtained in real time, and the stability of the change trajectory thereof within a unit time is monitored. When the state of charge is unstable, the current state of charge value is filtered, and the high-confidence state of charge after filtering is used to determine the sub-domain, thereby ensuring the robustness of the sub-domain determination logic and making the issued frequency modulation instruction smoother and more continuous.

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