Converter valve submodule and bypass switch cooperative configuration method and system

By forming a coordinated circuit between the bypass switch and the reactor unit, and optimizing the parameters of the reactor unit through the transient analysis model, the problem of poor protection of traditional bypass switches after the error is closed is solved, achieving higher protection success rate and system stability.

CN119726880AActive Publication Date: 2025-03-28STATE GRID ECONOMIC TECH RES INST CO LTD +2
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Patent Information

Application Number
CN202510214847.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-26
Publication Date
2025-03-28
Estimated Expiration
2045-02-26

AI Technical Summary

Technical Problem

Traditional bypass switches are difficult to effectively protect submodules after accidentally closing, resulting in risk of equipment damage, system instability and even safety accidents.

Method used

By connecting the bypass switch in series with the reactor unit, a collaborative circuit is formed, and a transient analysis model is established, the parameters of the reactor unit are solved according to the multi-objective constraints, and the configuration of the reactor unit is optimized to reduce the closing current of the bypass switch and the short-circuit current rise rate when the error is closed.

Benefits of technology

Effectively reduce the closing current of the bypass switch, reduce the rise rate of short-circuit current during the wrong closing, improve the protection success rate, and avoid equipment damage and system instability.

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Abstract

The invention discloses a collaborative configuration method and system for a converter valve sub-module and a bypass switch, and relates to the technical field of flexible direct current transmission. The bypass switch and a reactor unit are connected in series to obtain a bypass circuit; the reactor unit comprises an inductor and a resistor which are connected in series; connecting a bypass circuit to two ends of each sub-module in the converter valve to obtain a cooperative circuit; establishing a transient analysis model of a submodule in the converter valve; performing multi-target constraint on the transient analysis model according to the operation condition of the converter valve, and solving the transient analysis model to obtain a first type selection parameter of the reactor unit; simulating a capacitor discharge working condition and a bypass switch false closing working condition to obtain a second type selection parameter of the reactor unit; and configuring a cooperative circuit of the sub-module in the converter valve by adopting the second type selection parameter. By adopting the embodiment of the invention, the closing current of the bypass switch can be effectively reduced, the rising rate of the short-circuit current when the bypass switch is mistakenly closed is effectively reduced, and the protection success rate is improved.
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