Rolling control method of energy storage power station time intervals adapted to power grid peak regulation and frequency regulation

Abstract

The invention discloses a power grid peak-shaving and frequency-regulating energy storage power station time period rolling control method, which is applied to the dispatching control requirements of grid-side large-scale energy storage in grid peak-shaving and frequency-regulating multiple application scenarios. The typical time period of the energy storage power station stipulates the operation control behavior of the energy storage power station in a defined time period within a day, and the result of the rolling calculation of the period electricity is used as the base power of the active power control target of the energy storage power station, and on this basis, it participates in the regulation of unbalanced power in the grid , realize the self-adaptive correction of the base point power in the predefined period, ensure that the state of charge SOC of the energy storage power station is controlled in place before the end of each period, and can take into account the control objectives of peak regulation and frequency regulation of the power grid, and reserve enough callable power for the energy storage power station Space to improve the economic benefits and energy utilization efficiency of energy storage power stations. Compared with the plan tracking mode, after adopting this method, the SOC control accuracy of the energy storage power station is increased by 40%.

Description

technical field [0001] The invention relates to a rolling control method of electric quantity of an energy storage power station during a time period adapted to peak regulation and frequency regulation of a power grid, and belongs to the technical field of electric power system control. Background technique [0002] The power system uses load management methods such as direct load control and electricity price incentives to reduce the peak-to-valley difference of the system's power load to improve the shape of the load curve. The reduction of the peak load of the system is beneficial to postpone the upgrade of equipment capacity, improve the utilization rate of equipment, save the cost of equipment update, and reduce the cost of power supply. At present, pumped hydro storage and electrochemical energy storage in the power system obtain economic benefits by utilizing the difference in peak and valley electricity prices, and can play a huge role in peak shaving and valley fill...

AI Technical Summary

Problems solved by technology

In actual operation, energy storage can quickly track commands and realize charging and discharging power reversal, and participate in power grid frequency regulation while tracking power generation plans, resulting in actual output deviating from power generation plans. There is a big gap

If the online SOC of the energy storage power station deviates from the planned expected SOC, it will not be able to reserve enough electric energy space before the arrival of the next charging and discharging period, and will not be able to effectively participate in the peak or valley of the power grid

As a result, it is impossible to effectively utilize the advantages of the peak-to-valley price difference of the power grid to maximize the economic benefits of the power station

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