Medium voltage distribution network power line communication (PLC) networking scheme with substation topology structure considered

Abstract

The invention discloses a medium voltage distribution network power line communication (PLC) networking scheme with a substation topology structure considered. Firstly, the overall structure of a PLCnetwork is built according to the medium voltage distribution network topology structure, and each distribution outgoing line is corresponding to a PLC sub network in a master-slave structure with a relay node; then, a frequency selection process for building a link between nodes is determined, the frequency selection speed is quickened by using the asymmetry of two-way channel characteristics, frequency point preference is completed through twice frequency point tests and simple calculation, and the adjustment of a weight coefficient in the algorithm can flexibly control the quality of the two-way channel; and finally, a PLC central node is arranged on a bus, a sub network main node is arranged in the middle of the line and a hierarchical sub network searching and networking process is completed. The medium voltage distribution network power line communication (PLC) networking scheme with the substation topology structure considered has the beneficial effects that the adverse effectsof the substation topology structure on the PLC system can be weakened, the number of nodes in a carrier system is reduced, the PLC network performance is improved, and the channel conflict in the case of parallel operation of the PLC sub networks can be eliminated.

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...

AI Technical Summary

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

Images