Method for synchronizing redundant time of intelligent substation

A technology of intelligent substation and redundant time, applied in the direction of synchronization, electronic timer, clock driven by synchronous motor, etc., can solve the problems of secondary equipment not working normally, invalid network sampling value data, etc.

Inactive Publication Date: 2014-01-15
STATE GRID CORP OF CHINA +3
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Problems solved by technology

If the time synchronization system is abnormal, it may lead to invalid network

Method used

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  • Method for synchronizing redundant time of intelligent substation
  • Method for synchronizing redundant time of intelligent substation
  • Method for synchronizing redundant time of intelligent substation

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Embodiment Construction

[0036] In order to further describe the technical features and effects of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] refer to figure 1 , The present invention provides a redundant time synchronization system for intelligent substations, including a primary master clock, a backup master clock, two sets of extended clocks, a switch and a number of time-serving devices. The dual master clocks use GPS / Beidou dual time source redundant input, and the dual master clocks also use IRIG-B mutual backup to provide redundant time sources. The dual master clocks do not directly output time source signals to the timed equipment. All The time synchronization signal is given from the extended clock, and all the extended clocks uniformly select the active master clock as the default time source, and switch to the backup master clock when the active master clock fails or t...

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Abstract

The invention discloses a method for synchronizing redundant time of an intelligent substation. A system for synchronizing the redundant time of the intelligent substation is of the redundant configuration with double master clocks and two sets of extension clocks. The double master clocks receive and synchronize double time source signals, the extension clocks receive and synchronize double master clock time source signals, a time service device receives and synchronizes the time source signals coming from the extension clocks, the time service device having high requirements for time synchronization and accuracy transmits the time source signals through IRIG-B and IEC61588, the effectiveness of the time source signals is judged before synchronization of the double master clocks and double time sources, synchronization of the extension clocks and the double master clocks and synchronization of the time service device and the extension clocks, and the time source signals are synchronized in a mode of carrying out regulation step by step with the fixed step length. The method meets the requirement for reliability, stability and high accuracy of time synchronization of the intelligent substation.

Description

technical field [0001] The invention relates to the technical field of electric power automation, in particular to a redundant time synchronization method of an intelligent substation. Background technique [0002] With the development and construction of the smart grid proposed by the State Grid Corporation of China, the development and construction of smart substations has become the development goal of substations. Its intelligence level is mainly reflected in the advanced applications based on the data sharing of the whole station, and the key to improving the integration of smart substation automation systems It is to give full play to the advantages of the network, simplify the connection of equipment, and promote the network sampling technology. The time synchronization system is an essential part of the intelligent substation, which provides time information and synchronization information for various power system secondary equipment in the station, such as: dispatch...

Claims

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Application Information

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IPC IPC(8): G04G7/00
Inventor 高磊熊汉张鹏袁宇波卜强生宋亮亮张佳敏刘玙
Owner STATE GRID CORP OF CHINA
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