Bypass relay junction box

Abstract

The invention discloses a bypass relay junction box. Bypass conduction of the junction box is realized by receiving instructions sent by a monitoring center and transmitted by a radio frequency controller. The junction box comprises a junction box body, at least two wire holders are arranged in the junction box body and connected with a cell set through bus bars, and a relay turned on or off by receiving transmission signals of the radio frequency controller is electrically connected between the adjacent wire holders. On and off of the relay arranged in the junction box are controlled by the monitoring center, bypass control of a photovoltaic system is realized, and the bypass relay junction box has the greatest advantages that much heat cannot be generated in bypass conduction, bypass conduction voltage can be intelligently set, and maximum power output is realized.

Description

technical field [0001] The invention relates to the technical field of photovoltaic systems, in particular to a bypass relay junction box connected in parallel with photovoltaic module cell groups. Background technique [0002] At present, in the intelligent detection junction box used in the photovoltaic system, the bypass circuit mainly uses Schott diodes. Since the diodes are prone to a series of problems such as heat generation and energy consumption during operation, these imperfect characteristics of the diodes have a negative impact on the performance of the junction box. At the same time, the bypass conduction voltage of the diode is usually a fixed value. In theory, it can only be conducted when the voltage is zero. When there is still a weak voltage in a certain cell group in the photovoltaic module, the diode will be It may not be conducted and affect the normal operation of the entire system. Contents of the invention [0003] The technical problem to be solve...

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Problems solved by technology

[0002] At present, in the intelligent detection junction box used in the photovoltaic system, the bypass circuit mainly uses Schott diodes. Since the diodes are prone to a series of problems such as heat generation and energy consumption during operation, these imperfect characteristics of the diodes have a negative impact on the performance of the junction box. At the same time, the bypass conduction voltage of the diode is usually a fixed value. In theory, it can only be conducted when the voltage is zero. When there is still a weak voltage in a certain cell group in the photovoltaic module, the diode will be It may not be turned on and affect the normal operation of the entire system

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