Optimal configuration method of network-constructed SVG for improving voltage stability of hollowed-out power grid

By constructing a multi-source data acquisition and quantitative evaluation system and combining it with a multi-constraint optimization configuration model, the optimal configuration of grid-type SVG in hollow power grids was achieved, solving the problem of insufficient reactive voltage support of grid-type SVG in hollow power grids and improving the static and transient voltage stability of the power grid.

CN122338832APending Publication Date: 2026-07-03POWER RES INST OF STATE GRID SHAANXI ELECTRIC POWER CO LTD +2
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Patent Information

Application Number
CN202610513294.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-17
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In the existing technology, the control strategy, deployment and grid connection capacity of grid-type SVG are still immature, which limits its potential for reactive voltage support in hollow power grids and threatens the safe and stable supply of electricity.

Method used

A multi-source data acquisition method combining online real-time acquisition and offline supplementation is adopted to construct a quantitative assessment system for the degree of power grid hollowing. Through a multi-constraint, multi-objective optimization configuration model, combined with fault tolerance assessment and multi-objective ranking, the optimal configuration of SVG is achieved, forming a closed-loop configuration mechanism of offline optimization and online adaptive correction.

Benefits of technology

It significantly improves the static voltage stability margin of the system, reduces the voltage drop depth during faults, shortens the recovery time, and enhances the operational safety and disturbance resistance of the power grid.

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Abstract

This application relates to an optimized configuration method for improving the voltage stability of hollow power grids using SVG (Static Var Generator) architecture. The method includes: calculating the minimum singular value of the system Jacobian matrix based on power grid data; constructing a comprehensive evaluation model for weak nodes; calculating the node weakness index under various scenarios; constructing a static optimization configuration model; conducting analysis under a preset fault set; constructing a two-layer evaluation framework combining equipment-level and system-level analysis; quantifying the improvement of system transient voltage stability by candidate schemes; and comprehensively comparing and selecting the optimal configuration scheme that meets the requirements for transient stable voltage stability. This invention achieves accurate identification of weak nodes in the voltage stability of hollow power grids, significantly improving both the static and transient voltage stability margins of the system. It effectively solves the technical problems of voltage instability and poor transient recovery under high-proportion power electronics access, thereby improving the safety and anti-disturbance capability of power grid operation.
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