Post-disaster unit startup method and system of new power system considering voltage stability

By using a mixed-integer linear programming model and voltage stability criteria, converter types are distinguished, and post-disaster power system recovery schemes are optimized. This solves the problem of voltage stability not being considered and achieves rapid and safe post-disaster recovery.

CN122292373APending Publication Date: 2026-06-26XI AN JIAOTONG UNIV
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Patent Information

Application Number
CN202610393702.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-27
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies fail to differentiate between grid-connected and grid-connected converters in post-disaster power system recovery, resulting in insufficient consideration of voltage stability, inconsistencies between recovery strategies and equipment characteristics, a tendency to cause voltage collapse, slow recovery speed, and difficulty in balancing calculation accuracy and efficiency.

Method used

A mixed-integer linear programming model is adopted, which combines voltage stability criteria and iterative optimization mechanism to distinguish converter types. Voltage stability is verified by updating the admittance matrix and solving the impedance matrix, and power variables are optimized to generate a recovery scheme.

Benefits of technology

It enables rapid and safe post-disaster recovery in new power systems, balancing computational efficiency and voltage stability, improving the economy and feasibility of recovery strategies, avoiding the risk of voltage instability, and adapting to the equipment characteristics of high-proportion new energy power systems.

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Abstract

This invention discloses a novel power system post-disaster unit startup method and system considering voltage stability, belonging to the field of power system operation and control technology. The method includes: collecting basic grid information and predicting load and renewable energy output; constructing a multi-constraint MILP model to solve for a preliminary recovery strategy; identifying islanding converters with grid-connected characteristics, updating the admittance / impedance matrix, and verifying the results using voltage stability criteria; adding power constraints to unstable nodes and iteratively optimizing with fixed topology variables; and outputting a final solution that satisfies voltage stability. The system includes modules for data acquisition and prediction, preliminary strategy generation, voltage stability verification, iterative optimization, and solution output. This invention differentiates between converter types, incorporates an embedded VSC-HVDC, and employs an iterative mechanism of optimization followed by verification, effectively avoiding voltage instability, improving recovery speed and strategy accuracy, and is suitable for rapid and safe post-disaster recovery of new power systems.
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