Device and method for testing operating characteristics of direct-current field suppression switch

By designing an integrated DC demagnetizing switch operating characteristic testing device, the testing process is simplified, safety and accuracy are improved, and the problems of low testing complexity and safety in existing technologies are solved. It is applicable to DC demagnetizing switches of different models of large synchronous generators.

CN120971946APending Publication Date: 2025-11-18THREE GORGES JINSHAJIANG CHUANYUN HYDROPOWER DEV CO LTD
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Patent Information

Application Number
CN202511335887.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-18
Publication Date
2025-11-18

AI Technical Summary

Technical Problem

The operation characteristic test of DC demagnetizing switches in the existing technology is complicated and has low safety. It is difficult to detect the switch status efficiently and accurately, and there is a risk of incorrect wiring. Furthermore, the failure of operation due to wear or aging may cause the generator set to be forced to shut down or the equipment to be damaged.

Method used

A DC demagnetizing switch action characteristic testing device was designed, including a closing control circuit, a first opening control circuit, and a second opening control circuit. It integrates voltage dividing resistors, diodes, and control switches, and achieves circuit connection through terminal blocks. It adopts the "power off immediately after action" operation standard, which simplifies the testing process and improves safety.

Benefits of technology

It simplifies the test wiring process, reduces the risk of human error, improves test safety and accuracy, can detect potential hidden dangers in a timely manner, and avoids generator non-stop accidents caused by poor switch characteristics. It is applicable to DC demagnetizing switches for large synchronous generators of different models.

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Abstract

The invention provides a device and a method for testing the operating characteristics of a direct-current field suppression switch, and relates to the technical field of testing the operating characteristics of the direct-current field suppression switch. The closing control loop is used for controlling closing of the first coil; the first opening control loop is used for controlling opening of the first coil; the second opening control loop is used for controlling opening of the second coil; two ends of the closing control loop, the first opening control loop and the second opening control loop are respectively connected to a power supply positive electrode and a power supply negative electrode; wherein the closing control loop comprises a first closing switch, the first coil and a second closing switch which are sequentially connected in series; the first opening control loop comprises a first opening switch, the first coil and a second opening switch which are sequentially connected in series; and the second opening control loop comprises a third opening switch and the second coil which are sequentially connected in series. According to the scheme, the problems of complex operation and low safety of the DC field suppression switch operation characteristic test can be solved.
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