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A communication terminal, network and method for improving time synchronization accuracy in distribution network

A technology for power distribution terminals and communication networks, applied in wireless communication, electrical components, synchronization devices, etc., can solve the problems of scattered installation of power distribution terminals, configuration of satellite time synchronization devices, and high prices of satellite time synchronization devices

Active Publication Date: 2019-08-23
STATE GRID JIBEI ELECTRIC POWER COMPANY LIMITED CHENGDE POWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the high price of satellite time synchronization devices, the installation of power distribution terminals is scattered and the number is large, it is impossible to configure satellite time synchronization devices for each terminal. At present, only the master station can send time synchronization commands to power distribution terminals through GPRS wireless communication. The way

Method used

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  • A communication terminal, network and method for improving time synchronization accuracy in distribution network
  • A communication terminal, network and method for improving time synchronization accuracy in distribution network
  • A communication terminal, network and method for improving time synchronization accuracy in distribution network

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Experimental program
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Embodiment Construction

[0039] The present invention is made up of three parts:

[0040] 1. A wireless communication terminal with a timing module, comprising a power supply module, a CPU, the CPU is connected to a memory, a network interface module, a serial interface module, a wireless communication module, and the CPU is also connected to a timing module and an RTC module.

[0041] The CPU is connected to the timing module through a serial port, and the second pulse output of the timing module is connected to the capture pin of the CPU; the timing module is a GPS module or a Beidou module. In this embodiment, the time service module adopts the GPS module, and the second pulse output of the GPS is led to the capture pin of the CPU, and the processing clock in the interrupt can improve the time accuracy to the microsecond level.

[0042] The wireless communication module is connected to the CPU through a serial port; the wireless communication module is a Wifi module or a mobile phone module. In th...

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Abstract

The invention discloses a communication terminal, a network and a method for improving time synchronization accuracy in a power distribution network and relates to the field of distribution automation in an electric power system, in particular to network time synchronization and clock synchronization of a master station and a power distribution terminal in the power distribution network. In the communication terminal, a CPU is connected to a memory, a network interface module, a serial interface module, a wireless communication module, a timing module and an RTC module; the terminal is used in the distribution automation communication network; and the terminal has a step of own time synchronization and a step of time synchronization for the distribution terminal. Through application of the terminal, the network and the method, a time synchronization error can be increased within 2 milliseconds to completely conform to requirements for the distribution automation network.

Description

technical field [0001] The invention relates to the field of distribution automation in the power system, in particular to the network time synchronization and clock synchronization of the master station and the distribution terminal in the distribution network. Background technique [0002] The State Grid Corporation of China has gradually increased its investment in the distribution network. In the distribution automation system that has been put into operation, the terminals are widely distributed. The communication between the main station and the power distribution terminal is generally realized by means of the mobile public network. Because GPRS communication has the advantages of small investment, wide coverage and convenient construction, most of the communication in the distribution automation system that has been built is based on GPRS communication. [0003] The main station and the power distribution terminal are connected to the GPRS module using a serial port o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
CPCH04W56/0015H04W56/004
Inventor 屈国旺胡金路安志国陈贺陈洪雨吴纳磊李英春刘汉宁刘腾飞辛海斌刘海涛常生强朱雅通袁玉宝王强
Owner STATE GRID JIBEI ELECTRIC POWER COMPANY LIMITED CHENGDE POWER SUPPLY