Energy storage optimization control method considering wind power dispatching and frequency modulation limit

Abstract

The invention relates to an energy storage optimization control method considering wind power dispatching and frequency modulation limit, which is characterized by comprising the following steps of: establishing a wind storage operation model taking the maximum profit of a wind storage power station as a target in an electricity market environment by utilizing a strategy that an energy storage auxiliary wind power plant tracks a day-ahead dispatching plan and participates in frequency modulation, wherein the wind storage operation model is used for calculating the optimal output for tracking the day-ahead scheduling plan and participating in frequency modulation of the energy storage auxiliary wind power plant. When an energy storage SOE state is normal, the capability of tracking the scheduling plan of the wind power plant can be improved, so that the tracking scheduling plan index is obviously reduced compared with that when no energy storage exists; frequency safety constraint formed by the power grid frequency modulation limit can forcibly store energy to provide frequency modulation power, so that the power grid frequency safety is effectively maintained; and under the condition of considering income of operation cost, energy, frequency modulation and the like, one-day profit of the wind storage power station can reach 188677 yuan, which shows that good economic benefits are achieved by simultaneously using the energy storage for assisting the wind power plant in tracking the scheduling plan and participating in frequency modulation in the electricity market environment.

Description

technical field [0001] The invention relates to the technical field of power grid frequency regulation, takes day-ahead dispatching as the research background, and proposes an energy storage optimization control method considering wind power dispatching and frequency regulation limits under the environment of an electric power market. Background technique [0002] In recent years, the installed capacity of new energy represented by wind power has increased rapidly, but the randomness of wind power output makes it impossible for wind farms to accurately track power generation plans, resulting in increased power fluctuations on the power supply side, which seriously threatens the frequency security of the grid. Energy storage is a solution to the problem of wind power grid integration. Effective means, supported by national policies, have outstanding performance in assisting wind farms to track power generation plans and improving grid frequency fluctuations. However, on the o...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the installed capacity of new energy represented by wind power has increased rapidly, but the randomness of wind power output makes it impossible for wind farms to accurately track power generation plans, resulting in increased power fluctuations on the power supply side, which seriously threatens the frequency security of the grid. Energy storage is a solution to the problem of wind power grid integration. Effective means, supported by national policies, have outstanding performance in assisting wind farms to track power generation plans and improving power grid frequency fluctuations

However, on the one hand, the existing research only considers the energy storage-assisted wind farm to track the power generation plan or participate in frequency regulation, and the working mode is relatively single; Therefore, it is of great significance for the application of energy storage in the field of frequency regulation to study the optimal control method of energy storage considering the limit of wind power dispatching and frequency regulation.

Images