An intelligent switch for detecting line faults before closing and its detection method

Abstract

The invention discloses an intelligent switch for detecting line faults before closing, comprising: a single-chip microcomputer, the single-chip microcomputer is respectively connected with a switch body, an overvoltage protection module, an overcurrent protection module, a short circuit protection module, a fault detection module, an automatic reclosing module, a wireless The communication module is connected to the GPS positioning module; the overvoltage protection module, the overcurrent protection module and the short circuit protection module are used for preliminary detection and protection of the switch body fault; the fault detection module is used for real-time detection single-phase grounding fault and phase-to-phase short-circuit fault on the electric line; the automatic reclosing module is used to judge whether to re-close; the present invention firstly ensures whether the protection function of the switch itself is faulty, and provides a guarantee for the safety of the intelligent switch. The first level of guarantee is guaranteed, which further ensures that there is no fault on the line before closing, effectively prevents the occurrence of closing with a fault, and provides a further guarantee for safety and reliability.

Description

technical field [0001] The invention relates to the technical field of intelligent switches, in particular to an intelligent switch for detecting line faults before closing and a detection method thereof. Background technique [0002] In the low-voltage power distribution system, after the line trips due to a fault, the fault detection of the system is not carried out before the switch is reclosed, which may easily cause the fault to be closed. Line fault reclosing will not only adversely affect the system, but also bring danger to people. Low-voltage lines are scattered in the system, and the users are non-professionals. Therefore, the safety of low-voltage lines is particularly important. With the development of society, the power outage time is also related to the economic development, and the shorter the time, the less losses will be caused. [0003] Therefore, how to provide an intelligent switch and its detection method for detecting line faults before closing to impr...

AI Technical Summary

Problems solved by technology

[0002] In the low-voltage power distribution system, after the line trips due to a fault, the system is not detected for faults before the switch is reclosed, which may easily cause the fault to be closed

Line fault reclosing will not only have adverse effects on the system, but also bring danger to people. Low-voltage lines are scattered in the system, and the users are non-professionals. Therefore, the safety of low-voltage lines is particularly important.

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