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Intelligent power grid distribution and autonomous wide-area timing method

A smart grid, autonomous technology, applied in the field of power system, can solve problems such as poor synchronization, achieve the effect of eliminating dependence and improving time synchronization performance

Inactive Publication Date: 2010-10-13
李泽文 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to overcome the deficiencies of the prior art and solve the technical problem of poor synchronization in the time synchronization method of the existing wide-area time synchronization system

Method used

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Embodiment Construction

[0020] see figure 1 , figure 1 In order to implement the wide-area time synchronization system model of the present invention, there are 3 substations, a power plant and a dispatching center in the whole wide-area time synchronization system, that is, there are 5 time nodes in total, and each time node has an independent satellite synchronous clock.

[0021] Each time node releases time synchronization information to other time nodes in the form of data packets through the optical fiber communication network at the same time at a fixed time interval of 10 seconds. The priorities of the data packets issued by each time node from high to low are respectively Time node 1, time node 2, time node 3, time node 4, time node 5.

[0022] The maximum transmission delays between time node 2, time node 3, time node 4, and time node 5 to time node 1 are shown in Table 1 respectively.

[0023] Table 1

[0024] transmission path

Maximum transmission delay τ ...

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Abstract

The invention belongs to the field of power systems and relates to an intelligent power grid distribution and autonomous wide-area timing method. The method of the invention comprises: constructing an intelligent power grid wide-area time synchronization system, wherein each of the plant stations and scheduling centers in the system represents a time node, and each time node has an independent satellite synchronous clock responsible for keeping the time synchronization of all sets of power equipment in the node and releases time synchronization information to other time nodes in the wide-area time synchronization system through a time communication network; and keeping the time synchronization of the time nodes by the time information of the satellite synchronous clocks when the satellite synchronous clocks work normally, and correcting the time information of a local crystal oscillator color by the time synchronization information released by other time nodes in the wide-area time synchronization system to keep the time synchronization of the node when the satellite synchronous color of a certain time node fails to work. The method of the invention provides a new through for the time synchronization of a power grid and can improve the time synchronization performance of the intelligent power grid effectively.

Description

technical field [0001] The invention belongs to the field of power systems and relates to a distributed and autonomous wide-area time synchronization method for smart grids. Background technique [0002] At present, most of the time synchronization methods used in power systems are discrete networking methods. The discrete networking method is to configure an independent and complete time synchronization system in a power plant, substation or dispatching center that is relatively independent in geographical location. In power plants or substations, the secondary equipment that needs time synchronization is often distributed in different locations. Therefore, the time synchronization system of discrete networking mode is composed of one or two GPS master clocks and multiple secondary clocks in one station. network clock. The network clock only realizes local synchronization in the plant, not the global synchronization of the system; and each power plant, substation, and disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G04G7/00
Inventor 李泽文马晓军谢单单
Owner 李泽文
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