Direct-current small-current arc generation device and method

Abstract

The invention provides a direct-current low-current arc generation device and method. The direct-current low-current arc generation device comprises a first conductive rod, a second conductive rod and a conductive velvet group, one end of the first conductive rod is tip-shaped, and the conductive velvet ball is wound into a ball by a fine metal wire with the diameter smaller than a preset value; the tip of the first conductive rod is heated and then inserted into the conductive velvet cluster, the conductive velvet cluster is sheared along a cross section perpendicular to the first conductive rod outside the tip, and the conductive velvet outside the cross section is sheared off; the second conductive rod is made of a conductive material with low resistivity and soft texture; one end of the second conductive rod is a plane; at the initial moment, the plane ends of a large number of tip second conductive rods of the prepared conductive rods are pressed tightly, so that the prepared conductive rods and the second conductive rods are connected in series, and small direct current is introduced into the two conductive rods connected in series; subsequently, at least one of the prepared conductive rod or the second conductive rod is translated such that there is a gap between the two conductive rods to generate a direct-current low-current arc within the gap.

Description

technical field [0001] The invention belongs to the field of direct current detection, and more specifically relates to a small direct current arc generating device and method. Background technique [0002] With the acceleration of the global electrification process, the demand for electricity continues to rise, and photovoltaic power generation is rapidly popularized. However, photovoltaic accidents at home and abroad are also showing an upward trend. Arcing is a gas discharge phenomenon that produces high temperatures, brightness and radiation. When an arc occurs, if the arc is not extinguished in time, it may cause cable damage, loss of power generation, or even fire. In a photovoltaic system, one of the common types of arcs on the DC side is a series arc, which is commonly seen at the MC4 terminal of the photovoltaic system. In order to cut off the branch in time when an arc occurs, it is necessary to add an arc detection function in the photovoltaic system. [0003] ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the prior art, the object of the present invention is to provide a DC small current arc generating device and method, aiming to solve the problem that the existing arc generating technology can only generate arcs in circuits with large currents, and it is difficult to generate arcs in circuits with small currents. To generate a stable arc, it is difficult to collect small current arc waveform data for exploration

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