Weak network under the network energy storage frequency adaptive adjustment method and system

By constructing an islanded node state diagram and introducing logical master grid nodes, the problems of uncontrollable phase and power fluctuation in grid-connected energy storage devices under weak grid conditions were solved, and the stability and coordination of frequency regulation were improved.

CN121566550BActive Publication Date: 2026-04-10NANJING JIASHENG ELECTROMECHANICAL EQUIP MFG CO LTD
2 Cites 0 Cited by

Patent Information

Application Number
CN202610083947.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-22
Publication Date
2026-04-10
Estimated Expiration
2046-01-22

AI Technical Summary

Technical Problem

Under weak grid conditions, grid-connected energy storage devices suffer from uncontrollable phase convergence paths, large power fluctuations, traction conflicts, and poor grid connection stability during grid connection. Existing technologies lack a structured description of the collaborative behavior of multiple grid-connected devices.

Method used

By constructing an island node state diagram, extracting the main network phase features and introducing logical main network nodes, a phase convergence diagram is formed. The consistency evaluation index is used to suppress and update the competition of the traction nodes, generating a grid connection structure diagram and realizing the coordinated adjustment of frequency parameters.

Benefits of technology

It improves the stability and controllability of the reconnection process under weak network conditions, avoids phase pulling and power conflicts caused by multiple devices pulling at the same time, and ensures the overall coordination and continuity of frequency regulation.

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

Abstract

The application relates to the technical field of frequency regulation, in particular to a weak-network-construction energy storage frequency self-adaptive regulation method and system, and the following scheme is provided: a node state diagram reflecting device state and coupling relationship is constructed in an island operation stage, main network phase characteristics are extracted based on a common coupling point measurement signal when a grid-connected condition is met, a logical main network node carrying a phase corridor attribute is introduced, and controlled injection of a main network phase reference is realized. Further, a phase convergence diagram is formed according to traction compatibility judgment and diagram reconstruction mechanism, a traction node is subjected to competitive inhibition update through a consistency evaluation index, a grid-connected structure diagram is generated, and thus coordinated regulation of frequency parameters of multiple network-construction energy storage devices under a weak network condition is realized, and stability and controllability of a regrid process are improved.
Need to check novelty before this filing date? Find Prior Art