A method and device for coordinated voltage regulation of power grid in areas with high proportion of renewable energy

By constructing a joint topology-operational graph and a graph neural network, feasible voltage prediction sequences are generated, which solves the voltage stability problem in power grids with a high proportion of renewable energy. This enables rapid identification and coordinated control of voltage approach risks, ensuring the stable operation of the power grid.

CN121440642BActive Publication Date: 2026-07-17THREE GORGES NEW ENERGY PINGDING POWER GENERATION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
THREE GORGES NEW ENERGY PINGDING POWER GENERATION CO LTD
Filing Date
2025-11-05
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In power grids with a high proportion of renewable energy, voltage stability is difficult to guarantee, especially due to the concentrated risk of voltage exceeding limits caused by the volatility and low inertia of new energy sources, making stable operation difficult to achieve.

Method used

By constructing a topology-operational joint graph, a multi-scale renewable energy power prediction trajectory is generated. A graph neural network is used for two-layer judgment to generate a feasible voltage prediction sequence. Combined with risk windows and scenario compression mechanisms, a pre-control scheduling table is generated to achieve voltage coordinated regulation of the power grid in areas with a high proportion of renewable energy.

Benefits of technology

It enables rapid and forward-looking identification of voltage approach risks in power grids in areas with a high proportion of renewable energy, and generates immediately executable coordinated control strategies to ensure the stable operation of the power grid.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to the field of power grid voltage control technology, and discloses a method and device for coordinated voltage control of power grids in areas with a high proportion of renewable energy. The method includes: encapsulating power grid topology data and operational constraints into a topology-operational state joint graph; generating multi-scale renewable energy power prediction trajectories using the topology-operational state joint graph, and performing physical feasibility verification on the multi-scale renewable energy power prediction trajectories to obtain a weighted scenario set; generating a risk fluctuation envelope using a sensitivity-driven order-preserving compression mechanism; performing a two-layer judgment based on the risk fluctuation envelope using a graph neural network to obtain a feasible voltage prediction sequence; generating a candidate pre-control set using a scenario compression mechanism determined by a risk window; generating a pre-control scheduling table based on the candidate pre-control set, and continuously updating the pre-control scheduling table to generate a coordinated voltage control strategy for power grids in areas with a high proportion of renewable energy. This invention achieves forward-looking identification and coordinated control of node voltage approaching the upper limit.
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