Intelligent comprehensive control method for participation of BESS in primary frequency modulation of power grid

Abstract

The invention discloses an intelligent comprehensive control method for participation of BESS in primary frequency modulation of a power grid. The method comprises the following steps: on the basis ofanalyzing a power grid frequency modulation demand and a BESS charged state SOC, proposing a BESS adaptive control strategy, and converting a power grid frequency deviation [delta]f into a referenceabsorption or output power [delta]P of the BESS through the control strategy; in order to improve the frequency response speed and precision of the BESS and enable the BESS to provide rapid and stablepower support for a power grid, providing a double-layer structure power regulation controller based on biological network regulation to control output [delta]P; and in order to improve the dynamic response capability of the double-layer structure power regulation controller, introducing a multi-parameter self-tuning controller based on a discretization prediction algorithm, and providing a dynamic tuning method of control parameters of the double-layer structure power regulation controller. According to the method, active power support can be effectively provided for the power grid, the problem of overcharge and overdischarge of the energy storage battery is solved, the circulation efficiency of the BESS is improved, and the maintenance cost of the energy storage system is reduced.

Description

technical field [0001] The invention relates to the technical field of BESS, in particular to an intelligent comprehensive control method for BESS participating in primary frequency regulation of a power grid. Background technique [0002] With the depletion of fossil energy and the increasingly serious environmental pollution, large-scale development and utilization of renewable energy such as wind energy and solar energy is an effective way to achieve sustainable energy development, meet energy consumption needs, and improve environmental quality. However, the output of clean energy represented by wind energy and solar energy has randomness and volatility. When connected to the grid on a large scale, problems such as power fluctuations will occur, which will make the dynamic imbalance between the active output and load of the power system, resulting in system frequency deviation. , which poses a severe challenge to the security and stability of the power system. The batte...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an intelligent comprehensive control method in which BESS participates in primary frequency regulation of the power grid, which can effectively provide active power support to the power grid and meet the needs of the power grid Frequency modulation requirements, while solving the problem of overcharging and overdischarging of energy storage batteries, improving the cycle efficiency of BESS and reducing the maintenance cost of energy storage systems

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