A Networking Scheme of Power Line Carrier Communication in Medium Voltage Distribution Network Considering Substation Topology

Abstract

The invention discloses a medium-voltage distribution network Power Line Communication (PLC) networking scheme considering the topological structure of a substation. Firstly, the overall structure of the PLC network is established according to the topological structure of the medium-voltage distribution network, and each power distribution outgoing line corresponds to a A "master-slave" structure PLC subnet with relay nodes; then determine the frequency selection process for establishing links between nodes, and use the asymmetry of the two-way channel characteristics to speed up the frequency selection speed, which is completed by two frequency point tests and simple calculations The frequency point is optimized, and the adjustment of the weight coefficient in the algorithm can flexibly control the quality of the two-way channel; finally, the PLC central node is installed on the bus, the subnet master node is set in the middle of the line, and the layered search subnet networking process is completed. The beneficial effect of the invention is that it can reduce the negative impact of the substation topology on the PLC system, reduce the number of carrier system nodes, improve the performance of the PLC network, and help eliminate channel conflicts when the PLC subnets run in parallel.

Description

technical field [0001] The invention belongs to the technical field of power line communication, and relates to a networking scheme of power line carrier communication in a medium-voltage distribution network considering the topological structure of a substation. Background technique [0002] With the continuous deepening of research on smart distribution network and the gradual application of big data analysis technology, higher and higher requirements are put forward for distribution communication network. Power Line Communication (PLC) technology has a natural communication channel and flexible and convenient application. It has become an important choice for medium-voltage distribution communication network and has strong application potential in the field of distribution automation for medium-voltage distribution network. The urban medium-voltage distribution network is led out from the 10kV or 35kV side busbars of the substation. The power distribution radius is usuall...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a medium-voltage distribution network power line carrier communication networking scheme considering the topological structure of the substation, which solves the problem that the existing PLC communication network does not consider the influence of the substation bus shunt effect, resulting in relatively slow frequency selection when establishing a network link. Slow, the communication distance of the master node in the subnet is short, the number of relays from the slave node is large, and the channel conflict between subnets is severe

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