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A method and system for distributed differential protection of distribution network based on 5G network

A differential protection and distribution network technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of unfavorable differential protection in the distribution network, lack of optical fiber laying conditions, and difficult construction. The effect of reliable communication, convenient access and low cost

Active Publication Date: 2021-01-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, differential protection based on optical fiber communication is generally used in various places, but this requires large-scale laying of optical fibers, which is difficult in construction and high in investment. In addition, the locations of power distribution terminals in some places do not have the conditions for laying optical fibers, which is not conducive to differential protection in distribution. The promotion and application of power grid

Method used

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  • A method and system for distributed differential protection of distribution network based on 5G network
  • A method and system for distributed differential protection of distribution network based on 5G network
  • A method and system for distributed differential protection of distribution network based on 5G network

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Embodiment 1

[0042] See attached figure 1 , 2 As shown, this embodiment discloses a distribution network differential protection method based on 5G communication, including:

[0043] Step 1: Insert a qualified telecom operator-specific SIM card into the 5G wireless terminal to receive 5G signals and implement routing functions. Within the signal coverage of the 5G base station, access the dedicated 5G network slicing network customized by the network operator.

[0044] The conditions that the SIM card must meet are:

[0045] (1-1) The IP address obtained by the 5G SIM card from the network operator is fixed and long-term online.

[0046] (1-2) Different 5G SIM cards can send and receive data based on the TCP / IP protocol.

[0047] Step 2: Configure the 5G wireless terminal device so that the data of the digital protection device connected to the 5G signal receiving module at the opposite end can be forwarded to the digital protection device at the local end, thereby realizing the data in...

Embodiment 2

[0076] see attached figure 1 As shown, the purpose of this embodiment is to provide a distributed differential protection system for distribution network based on 5G network disclosed by the present invention, including:

[0077] Based on the communication channel of the 5G network, a dedicated SIM card, 5G wireless terminal, and 5G slice network environment are used to construct a protected communication channel. The slice network is customized based on ultra-high reliability and ultra-low latency (uRLLC) scenarios.

[0078] The digital protection devices installed at both ends of the line, each of the two digital protection devices is connected to a 5G wireless terminal, and the two 5G wireless terminals are connected to the 5G customized network slice through a dedicated SIM card to realize the communication between the two 5G wireless terminals. Intercommunication with low latency;

[0079] A virtual server is set in the 5G wireless terminal, so that the data of the digit...

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Abstract

The invention discloses a power distribution network distributed differential protection method and system based on a 5G network. The method comprises the steps: in the case of signal transmission between digital protection devices, a communication channel based on the 5G network is used for communication, thereby achieving data interaction between the two digital protection devices; a 5G slice network is used as a communication channel, the communication security is ensured, and on the basis of the low time delay characteristic of 5G communication, a data link is optimized through the slice network to minimize the link transmission hop count and further reduce the time delay of data transmission; the digital protection devices are used to simultaneously carry out overcurrent detection oncurrents at two ends of a power distribution network line, the respective overcurrent moment is taken as a synchronization time reference of the digital protection devices at two ends of the line, once overcurrent is detected, the digital protection devices start, starting signals are sent to opposite ends, and after the digital protection devices start, current fault component values after faultstarting are calculated, and after calculation, current fault component data are transmitted to the opposite ends.

Description

technical field [0001] The invention belongs to the technical field of relay protection for power system distribution network, and in particular relates to a distributed differential protection method and system for distribution network based on 5G network. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] With the development of industrial technology and the improvement of people's quality of life, the society has higher requirements for the reliability of power supply. The traditional single-ended power distribution open-loop operation mode has low power supply reliability and is difficult to meet user needs. Moreover, the closed-loop operation mode of the distribution network is more suitable for the friendly access of distributed generation (DG), and it also has advantages in improving power quality. More and more regions have begun to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26
CPCH02H7/261H02H7/263
Inventor 高厚磊徐彬高维良李欣
Owner SHANDONG UNIV
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