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

A technology of carrier communication group and topology structure, applied in distribution line transmission systems, electrical components, data exchange networks, etc. Speed ​​up frequency selection and reduce the effect of influence

Active Publication Date: 2019-01-04
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 influe

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

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Embodiment Construction

[0031] The present invention will be described in detail below in combination with specific embodiments.

[0032] attached figure 1 A typical urban substation 10kV side network topology is given. According to the actual line model, the cable is YJV22-70mm 2 , the overhead line is taken as JKLYJ-120mm 2 . There is an outgoing line L on the busbar 1 ~ L 31 And the equivalent stray capacitance C on the 10kV side of the step-down transformer 杂散 , and through the cable L 32 Access power compensation capacitor C 补偿 . To qualify for L 1 As the research object, its backbone consists of cables (l 1 , l 2 )-overhead (l 3 , l 4 )-cable (l 5 , l 6 ) three lines in series, the lengths are 1km, 3km, and 1.5km respectively. Each section of the trunk line is connected with a cable branch in the middle, and the branch length is 0.5km. Both the cable branch and the end of the trunk line are connected with distribution transformers. Setting: 1) L on the right side of the bus bar ...

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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...

Claims

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Application Information

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IPC IPC(8): H04B3/54H04L12/24
CPCH04B3/54H04L41/12H04L41/145
Inventor 王艳薛晨焦彦军
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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