Wind storage combined frequency modulation control method and device under distribution and micro-power cooperation

By calculating the state of charge equalization of the energy storage unit and adaptively adjusting the sag coefficient, the problem of uneven charge and discharge of energy storage packets is solved, and the coordinated frequency regulation control of energy storage and fan is realized, which improves the stability and frequency regulation effect of the power grid.

CN119742817APending Publication Date: 2025-04-01ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
1 Cites 2 Cited by

Patent Information

Application Number
CN202411918637.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-04-01

AI Technical Summary

Technical Problem

In complex power grid environments, uneven charging and discharging of energy storage packets leads to insufficient output, and the prior art cannot effectively solve the problem of frequent changes in charging and discharging mode of energy storage.

Method used

By calculating the charge state equalization degree of multiple energy storage units, adaptively adjusting their sag coefficients, so that the energy storage unit has stronger stability in complex power grid conditions, and optimizes the energy storage and fan output through the coordinated frequency regulation control between the fan and the energy storage.

Benefits of technology

It has achieved the relief of insufficient energy storage output, improved the instability of the fan's output when regulating the frequency of the fan, and improved the primary frequency regulation effect in the micro-coordinated system.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides a wind storage combined frequency modulation control method and device under distribution and micro-grid cooperation, which is applied to a frequency modulation controller of a micro-grid, and comprises the following steps: obtaining the frequency of a distribution network, and calculating the state of charge of a micro-grid energy storage unit of the micro-grid under the condition that the fluctuation value of the frequency of the distribution network reaches a limit value; switching the charging and discharging states of the micro-grid energy storage unit, determining the energy storage balance degree of the micro-grid energy storage unit according to the recalculated charge state, and calculating the droop control coefficients of the micro-grid energy storage unit and the micro-grid fan according to the energy storage balance degree; and calculating the power of the micro-grid energy storage unit participating in frequency modulation and the power of the micro-grid fan participating in frequency modulation, and performing frequency modulation control according to the calculated power participating in frequency modulation. According to the method, the defect of insufficient output of the energy storage unit in the micro-grid caused by too high or too low energy storage balance degree can be made up, the output instability during frequency modulation of the fan can be improved, and the primary frequency modulation effect in the micro-distribution cooperative system can be improved.
Need to check novelty before this filing date? Find Prior Art