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

A technology of carrier communication group and topology structure, which is applied in distribution line transmission system, electrical components, data exchange network, etc. It can solve the problems of channel conflict between subnets, slow frequency selection speed, and many relay times, etc., and achieve weakening Influence and speed up the effect of frequency selection

Active Publication Date: 2021-04-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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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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  • A Networking Scheme of Power Line Carrier Communication in Medium Voltage Distribution Network Considering Substation Topology
  • A Networking Scheme of Power Line Carrier Communication in Medium Voltage Distribution Network Considering Substation Topology
  • A Networking Scheme of Power Line Carrier Communication in Medium Voltage Distribution Network Considering Substation Topology

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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 main 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 main line are connected with distribution transformers. Setting: 1) L on the right side of the bus bar 2 ...

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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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Application Information

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