A method for constructing a digital twin of a soft direct current valve and related equipment

By constructing a digital twin of the flexible DC converter valve and combining multi-source data and multi-physics field models, the problems of synchronization and diagnostic accuracy in operation and maintenance management in existing technologies have been solved, achieving efficient operation and maintenance decision support and fault early warning, and reducing equipment operation and maintenance costs.

CN122413638APending Publication Date: 2026-07-17CHINA SOUTHERN POWER GRID EXTRA HIGH VOLTAGE POWER TRANSMISSION CO LIUZHOU BRANCH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA SOUTHERN POWER GRID EXTRA HIGH VOLTAGE POWER TRANSMISSION CO LIUZHOU BRANCH
Filing Date
2026-03-02
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing technologies, the operation and maintenance management of flexible DC converter valves relies on periodic inspections and offline tests, which cannot reflect the real-time status. There is insufficient online monitoring data, poor synchronization between simulation models and physical entities, and a lack of multi-physics coupling models, resulting in weak predictability, low diagnostic accuracy, and insufficient closed-loop operation and maintenance decision-making.

Method used

A digital twin of the flexible DC converter valve is constructed. Through multi-source heterogeneous data acquisition, geometric model establishment, multi-physics field simulation mechanism model and real-time calibration, high-fidelity synchronization of electrical, thermal and mechanical stress models is achieved. Parameter adjustment is performed by combining historical data and machine learning to form a closed-loop operation and maintenance decision support.

Benefits of technology

It enables high-fidelity, real-time synchronous operation and maintenance of flexible DC converter valves, improves the accuracy of status assessment and fault early warning capabilities, optimizes operation and maintenance strategies, and reduces the total life cycle cost.

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Abstract

The application discloses a method for constructing a digital twin of a flexible direct current valve and related equipment, and relates to the technical field of digital twins. The method comprises the following steps: acquiring multi-source heterogeneous data of the flexible direct current valve; constructing a geometric model of the flexible direct current valve according to a three-dimensional model of a valve tower and each sub-module and corresponding topological relations; constructing a multi-physics field simulation mechanism model of the flexible direct current valve according to the multi-source heterogeneous data and the geometric model; the multi-physics field simulation mechanism model comprises an electrical model, a thermal model and a mechanical stress model; adjusting boundary conditions and dynamic states of the multi-physics field simulation mechanism model according to real-time operation data; adjusting inherent parameters of the multi-physics field simulation mechanism model according to historical operation data, experimental data and statistical rules; and constructing a digital twin of the flexible direct current valve according to the multi-physics field simulation mechanism model after adjustment of the boundary conditions, the dynamic states and the inherent parameters. The application can realize a real and synchronous digital twin of the flexible direct current valve.
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