Intelligent switch capable of detecting line fault before closing and detection method of intelligent switch

Abstract

The invention discloses an intelligent switch capable of detecting a line fault before closing. The intelligent switch comprises a single-chip microcomputer, wherein the single-chip microcomputer is 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 wirelesscommunication module and a GPS positioning module respectively; the overvoltage protection module, the overcurrent protection module and the short-circuit protection module are used for performing fault preliminary detection on the switch body and performing protection; the fault detection module is used for detecting a single-phase grounding fault and a phase-to-phase short-circuit fault on a distribution line in real time; and the automatic reclosing module is used for judging whether reclosing is needed or not. According to the intelligent switch, first, it is guaranteed that the protectionfunction of the switch itself does not have a fault, so that a first guarantee is provided for the safety of the intelligent switch; and it is further guaranteed that a fault does not exist on the line before closing, the situation of closing with a fault is effectively prevented, and a further guarantee is provided 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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