Arc Detecting Device For Detecting Serial Arc In Photovoltaic Junction Box

摘要

In the photovoltaic power generation connection panel, a current sensor connected to any part of a line formed by an input terminal, a fuse, a diode, and an output terminal to detect a current flowing in the line, a connection point of the input terminal connected to the PV string, the fuse and A temperature sensor connected to at least one of a connection point of the input terminal to be connected and a connection point to which the fuse and the diode are connected to detect a temperature of the corresponding part, and based on values detected by the current sensor and the temperature sensor An arc detection device for detecting a series arc in a photovoltaic power generation connection panel including a determination unit for determining whether a series arc has occurred at the connection point on the line is disclosed. In the arc detection device of the present invention, the determining unit determines whether the absolute value of the instantaneous rate of change for the current decrease is greater than a reference value when the current detected by the current sensor is momentarily reduced; determining whether the temperature detected by the temperature sensor immediately rises when the absolute value is greater than the reference value, and if the temperature increases immediately when the absolute value of the current decrease is greater than the reference value, the corresponding connection point A step of determining that a series arc has occurred may be performed. The arc detection device according to the present invention can detect a series arc in a simple manner, so that the detection result can be obtained reliably while configuring the device simply.