Detection device for parasitic loops

By designing a parasitic loop detection device for the capacitor input module and the main control module, the capacitor is automatically controlled to connect to the secondary circuit. The principle of capacitor voltage division is used to distinguish between induced electricity and parasitic electricity, which solves the problems of misjudgment and time consumption in the existing technology and realizes accurate parasitic loop detection.

CN119780773BActive Publication Date: 2026-06-05WENSHAN POWER SUPPLY BUREAU YUNNAN GRID
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Patent Information

Application Number
CN202411782103.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2026-06-05
Estimated Expiration
2044-12-05

AI Technical Summary

Technical Problem

Existing technologies cannot accurately determine whether parasitic loops exist in the secondary circuit, especially when induced voltage is present, which can easily lead to misjudgment, and manual operation is time-consuming and labor-intensive.

Method used

Design a parasitic loop detection device, including a capacitor input module and a main control module. By automatically controlling the connection and disconnection of the capacitor, the device detects voltage changes to determine whether a parasitic loop exists, and uses the principle of capacitor voltage division to distinguish between induced electricity and parasitic electricity.

Benefits of technology

It enables accurate identification of parasitic loops without compromising line safety, reducing manual operation time and improving detection efficiency.

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Abstract

The application discloses a kind of detection devices of parasitic loop, and the capacitor input module includes at least two parallel capacitors, and each capacitor can be respectively connected to the measured loop or disconnected with the measured loop by different capacitor lines;The host control module is used to detect the voltage of two voltage detection points of the measured loop after the air switch of the measured loop is disconnected, before the capacitor is connected;Control capacitor input module in the capacitor is connected to the measured loop by different capacitor lines in turn, and the voltage of two voltage detection points is detected every time a capacitor is connected;According to the voltage variation of two voltage detection points, it is judged whether the measured loop exists parasitic loop or not.The application can accurately distinguish parasitic series electricity and induced electricity, exclude the interference of induced electricity, truly judge whether detection parasitic loop exists or not, without manual wiring, save time and effort, and can be applied to the parasitic loop detection of various secondary circuits.
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