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Power distribution network current differential protection communication system and method

A current differential and communication system technology, applied in the field of communication, can solve the problems of complex switching process, high construction cost and environment, and inability to grasp the communication link status in time, so as to ensure switching efficiency, communication stability and timeliness. Effect

Inactive Publication Date: 2022-01-18
MEISHAN POWER SUPPLY CO STATE GRID SICHUAN ELECTRIC POWER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: the traditional EPON dedicated optical fiber channel communication method has high construction cost and environment, while the communication system with wireless and wired parallel methods has a complicated switching process and cannot timely grasp the status of the entire communication link , affecting the communication stability and timeliness of the current differential protection of the distribution network; the purpose of the present invention is to provide a communication system and method for the current differential protection of the distribution network to solve the above problems

Method used

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  • Power distribution network current differential protection communication system and method
  • Power distribution network current differential protection communication system and method
  • Power distribution network current differential protection communication system and method

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Embodiment 1

[0052] This embodiment provides a distribution network current differential protection communication system, such as figure 1 As shown, including: switching gateway, wired channel link and wireless channel link;

[0053] The switching gateway includes: a detection module, a switching switch, a switching module and a CPU;

[0054] The CPU controls the detection module to detect the state of the link protocol on the wired channel link or the wireless channel link;

[0055] The switching module controls the switch to switch from a wired channel link to a wireless channel link, or from a wireless channel link to a wired channel link, based on the link protocol status detection result.

[0056] The switching gateway also includes: a wired channel physical interface and a wireless channel physical interface;

[0057] The switching switch connects or disconnects the wired channel link through the physical interface of the wired channel; the switching switch connects or disconnects...

Embodiment 2

[0074] This embodiment provides a distribution network current differential protection communication method, which is applied to the distribution network current differential protection communication system in the previous embodiment, including:

[0075] Link protocol status detection for wired channel links or wireless channel links;

[0076] When the protocol state of the wired channel link or the wireless channel link is wrong, the switching switch is switched from the wired channel link to the wireless channel link, or from the wireless channel link to the wired channel link.

Embodiment 3

[0078] This embodiment designs a smart gateway 5G / optical fiber dual uplink communication system based on the above embodiments. On the distribution network line with optical cable resources, the optical cable (wired channel link) is used as the main communication medium, and the 5G communication (wireless channel link) is used as the main communication medium. As a backup link, when the optical cable is interrupted, the communication link can be quickly switched to 5G to realize wired / wireless link backup; on distribution network lines without optical cable resources, 5G communication can be directly used.

[0079] Hardware technical route:

[0080] The whole switching gateway is designed according to industrial-grade requirements, meeting the working temperature range of -40°C-+85°C, meeting IP40 dustproof and waterproof requirements, and can meet dust-level three explosion-proof requirements and industrial level-4 EMC electromagnetic protection national standards. The whole...

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Abstract

The invention discloses a power distribution network current differential protection communication system and method. The communication system detects the on-off conditions of all links in advance through a detection module, carries out the switching after a detection result is satisfied, carries out the switching when a channel is intact, and guarantees the communication stability and timeliness of the current differential protection of a power distribution network. A change-over switch is additionally arranged on the structure of the communication system, and switching between a wired channel link and a wireless channel link not only depends on routing selection but also depends on a detection result of a detection module; the switching operation is not only routing table convergence, and physical switching can be carried out through the change-over switch, so that the switching efficiency is ensured.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a communication system and method for current differential protection of a distribution network. Background technique [0002] At present, the current differential protection of the distribution network mainly adopts EPON dedicated optical fiber channel, and the EPON dedicated optical fiber channel adopts "hand in hand" protection, which can realize high-bandwidth service bearing, but at the same time, it also has the following disadvantages: [0003] 1. Large-scale laying of optical cables along power distribution lines, and disconnecting and terminating optical cables at business nodes, requires high process requirements and high construction costs, and some places where power distribution terminals are located do not have the conditions for laying optical fibers; [0004] 2. Due to the relatively high requirements of the optical receiving power of the ONU equipment in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/66H04L12/28H04W88/06H04W36/12H04W88/16H04B3/54H02H7/26
CPCH04L12/66H04L12/2869H04W88/06H04W36/12H04W88/16H04B3/54H02H7/261H02H7/262
Inventor 汪晓帆曾仕伦陈亮朱礼鹏易伟熊伟李建兵唐海东兰沂梅谢廷杰王后勤
Owner MEISHAN POWER SUPPLY CO STATE GRID SICHUAN ELECTRIC POWER CO
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