An SVG bypass method and bypass unit for a new energy station

By identifying SVG faults through an external bypass system and a lightweight neural network model, and combining thyristors and mechanical relays to achieve shockless bypass switching, the problem of SVG equipment shutting down due to single-point faults in complex environments has been solved, improving the high availability of the equipment and the stability of the power grid.

CN122246662APending Publication Date: 2026-06-19YUNNAN ELECTRIC POWER TESTING & RES INST (GRP) CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
YUNNAN ELECTRIC POWER TESTING & RES INST (GRP) CO LTD
Filing Date
2026-04-02
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing SVG equipment is prone to faults such as IGBT and drive signal loss and DC capacitor failure in complex environments such as high altitude, high/low temperature, strong electromagnetic interference, and frequent start-stop, resulting in reactive power fluctuations and seriously threatening the stability of the power grid. In addition, traditional SVG systems lack effective fault tolerance mechanisms, which can lead to the entire unit tripping and being taken out of operation.

Method used

An external bypass system is adopted, which synchronously collects multi-source operating signals through the bypass unit, identifies faults using a lightweight neural network model, and cuts off the power supply and drive signals of the faulty module through a shockless bypass switching process. Combined with thyristors and mechanical relays, the faulty module is achieved in steady state bypass, ensuring the continuous operation of other modules.

Benefits of technology

It achieves millisecond-level automatic identification and shock-free isolation of power module faults, avoids unplanned shutdowns of the entire unit, reduces voltage fluctuations and grid disconnection risks, and improves the high availability and operational stability of SVG equipment.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122246662A_ABST
    Figure CN122246662A_ABST
Patent Text Reader

Abstract

This invention discloses an SVG bypass method and bypass unit for new energy power plants. The bypass method is applied to an external bypass system and includes the following steps: Each bypass unit synchronously acquires multi-source operating signals from SVG sub-power modules, extracts heterogeneous fault features, and combines them into a fixed-dimensional feature vector; the feature vector is input into a lightweight neural network model in the bypass unit, outputs the operating status category and fault confidence score, and generates a fault confirmation signal; a specific bypass unit responds to the fault confirmation signal, performs a shockless bypass switching process, cuts off the DC power supply and drive signal input of the faulty SVG sub-power module, and completes bypass status reporting; the SVG main controller responds to the bypass status reporting signal and, based on the overall control strategy, adjusts the operating state of the SVG sub-power modules that have not experienced a fault.
Need to check novelty before this filing date? Find Prior Art