Energy storage prospect distribution control method of smoothing microgrid tie line power

Abstract

The present invention discloses an energy storage prospect distribution control method of smoothing microgrid tie line power. The energy storage prospect distribution control method of smoothing the microgrid tie line power can solve the problem of the microgrid power balance control in the condition having new energy random fluctuation. Specifically, a finite time rapid distribution power control protocol is enforced between energy storage individuals to realize the control target of smoothing the microgrid tie line output power, and the power regulation margin and the cost of energy storage are considered in the enforcement process for a time in the future. The energy storage prospect distribution control method of smoothing the microgrid tie line power considers the rapid fluctuation characteristics of the new energy curve and the energy storage device physics restriction, the regulation power of an energy storage polymer is obtained through solution of the model prediction control (MPC) problems for a time in the future, and the finite time rapid distribution power control protocol is designed based on the sliding-mode control (SMC) method to allow the charging and discharging power of the energy storage in the polymer to rapidly track a target power so as to realize the target of smoothing the microgrid tie line power.

Description

technical field [0001] The invention relates to a rolling time-domain energy storage forward-looking distributed control strategy for smoothing power fluctuations of micro-grid tie lines, belonging to the field of power system automation. Background technique [0002] With the incorporation of large-scale wind and optical power in the microgrid, the strong fluctuation of the power output of new energy has brought new challenges to the operation and control of the grid. On the other hand, there are a large number of decentralized energy storage devices in the microgrid, such as electric vehicles, electrochemical energy storage, etc., and the aggregation charge and discharge effect of a large number of energy storage units provides a new opportunity to stabilize the power output of new energy sources. Making full use of the charging and discharging flexibility of the energy storage device can greatly reduce the operating cost caused by the grid adjustment AGC unit processing, ...

AI Technical Summary

Problems solved by technology

However, when there are a large number of distributed energy storage devices in the system, the solution to the optimization problem increases proportionally with the growth of the network scale, which further increases the complexity of the problem solution; on the other hand, the real-time two-way communication between the control center and each energy storage individual is still is a technical challenge that needs to be overcome

In decentralized control, each energy storage individual only adjusts its own benefits based on the local information of the power grid, such as frequency and price. Due to its large randomness and lack of necessary coordination, the system may eventually become uncontrollable.

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