Power line carrier communication system and method based on multi-winding coupling inductor

Abstract

The invention discloses a power line carrier communication system and method based on multi-winding coupling inductor. The communication system is composed of a master device and a plurality of sub devices; a PLC module is respectively mounted at the rear end of the circuit breaker in every sub device; the PLC modules are used for realizing power line carrier communication between every sub device and the master device; N branches in the master device are connected parallelly and then are joined and output; the number N of the branches connected parallelly in the master device is equal to the number of the sub devices in the system; the N branches connected parallelly in the master device share one PLC module for realizing power line carrier communication between the master device and every sub device; the PLC module in the master device has N output windings; the N output windings are respectively in one-to-one correspondence with the input ends of the N branches connected parallelly in the master device; the master device side can realize communication with a plurality of sub devices by only one PLC module; simultaneously communication cannot be influenced by switch-on and switch-off of the circuit breaker of the master device, real time work of every link is ensured, complexity and cost resulted from mounting a plurality of PLC modules are reduced.

Description

technical field [0001] The invention relates to the technical field of power line carrier, in particular to a multi-winding coupled inductance power line carrier communication system and method. Background technique [0002] Power Line Carrier PLC (PowerLineCarrier) is a technology that uses power transmission lines to transmit signals in the form of carrier waves. The power line carrier module uses PLC technology to modularize the processing of signal transmission and reception, and provides users with standard RS485 / RS232 interfaces. [0003] In the application of power system, it is often encountered that multiple sub-equipment and a main equipment are connected together, or problems involving communication between multiple sub-equipment and a main equipment, such as figure 1 As shown, there will be circuit breakers or protective components with circuit breaker functions between the output terminals of each sub-equipment and the input terminals of the main equipment, whe...

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Problems solved by technology

[0007] figure 2 Although it can avoid the communication interruption problem caused by disconnection of the circuit breaker in each branch of the main equipment, the whole system needs to be connected to multiple PLC modules, which increases the system cost and installation complexity

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