DC voltage type PLC photovoltaic shutoff device circuit

Abstract

The invention discloses a DC voltage type PLC photovoltaic shutoff device circuit, which includes a photovoltaic module VPV, an input capacitor C4, a switch tube Q1, a freewheel diode D1, a first LC notch filter, an output capacitor C5, a transformer T1, a coupling capacitor C6, a third LC notch filter, a signal filter resistor R1, a signal filter capacitor C7 and a second LC notch filter. The twoends of the output capacitor C5 are output terminals. When the switch tube Q1 is opened, a series current and a PLC signal pass through the freewheel diode D1 to realize normal power line carrier communication; and when the switch tube Q1 is closed, power line carrier communication is stopped, and a series current passes through the switch tube Q1, without affecting the efficiency of the system and the stability of the system. The efficiency of the system, the stability of the system and the reliability of communication can be improved.

Description

technical field [0001] The invention relates to a PLC photovoltaic switch circuit, in particular to a DC voltage type PLC photovoltaic switch circuit, which belongs to the technical field of power electronic converters and communications. Background technique [0002] The traditional wireless communication method requires collectors and aggregators. The collectors are placed outdoors, and the aggregators are placed indoors. 485 communication is required between them, which brings great installation and space problems. Secondly, there are many interference factors for wireless communication. , Different frequency bands must be used between adjacent power stations, and there will be interference between frequency bands, resulting in packet loss and affecting the reliability of communication. [0003] Power Line Communication (PLC) is a communication method that uses a power line as a signal channel to transmit data. This technology is to load the high-frequency signal carryin...

AI Technical Summary

Problems solved by technology

[0002] The traditional wireless communication method requires collectors and aggregators. The collectors are placed outdoors, and the aggregators are placed indoors. 485 communication is required between them, which brings great installation and space problems. Secondly, there are many interference factors for wireless communication. , different frequency bands must be used between adjacent power stations, and there will be interference between frequency bands, resulting in packet loss and affecting the reliability of communication

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