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Clock synchronization method of network sampling intelligent substation

A technology of intelligent substation and clock synchronization, which is applied to synchronization devices, electrical components, digital transmission systems, etc., can solve problems such as devices being out of synchronization, and achieve the effect of ensuring uniformity and improving the reliability and stability of time synchronization.

Inactive Publication Date: 2015-04-29
YUNNAN POWER GRID COMPANY ELECTRIC POWER RES INST
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Problems solved by technology

The priority setting adopted by the present invention is: Beidou time source>B code time source>GPS time source, which can avoid the problem that the device is not synchronized when there is a large deviation between the two master clocks A and master clock B due to special reasons

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  • Clock synchronization method of network sampling intelligent substation
  • Clock synchronization method of network sampling intelligent substation
  • Clock synchronization method of network sampling intelligent substation

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Embodiment Construction

[0038] The content of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0039] Such as image 3 As shown, a network sampling intelligent substation clock synchronization method, the present invention adopts dual master clock redundancy backup, dual master clock is composed of master clock A and master clock B; extended clock is composed of slave clock 1 to slave clock n, all The extended clock uniformly selects the main clock A as the default time source. When the main clock A fails, it will switch to the backup main clock B to ensure that all time synchronization signals of the whole station use the same time source; the Beidou time source is used as the main clock A and GPS time The source is the main clock B; at the same time, the priorities of the GPS time source, Beidou time source, and B code time source can be adjusted according to actual needs; the B code time source is the time signal connected between the...

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Abstract

The invention discloses a clock synchronization method of network sampling intelligent substation, wherein double master clock redundancy backups are used; the master clock is composed of a master clock A and a master clock B; an extended clock is composed of clock 1 to clock n; all extended clocks uniformly select the master clock A as the default time source, and then are uniformly switched to the standby master clock B when the master clock A becomes invalid. The invention solves the problems of intelligent substation synchronization system, puts forward a comprehensive solution for the clock synchronization system of network sampling intelligent substation, puts forward a combination mode of clock sources of the intelligent substation time synchronization system, and puts forward a way to track the satellite time and a seamless switching strategy between a GPS time source and a Beidou time source, greatly optimizes an abnormal fault tree structure of the intelligent substation time synchronization and protection malfunction fault tree structure caused by abnormal time synchronization, and can effectively improve the stability and reliability of the time synchronization system of intelligent substation.

Description

technical field [0001] The invention belongs to the technical field of power system substation automation, and in particular relates to a clock synchronization method of an intelligent substation based on network sampling. Background technique [0002] Smart grid has become the focus of attention in the world and is the future development direction of power grid. The construction of smart grid has become the goal of power grid development in all countries in the world. The smart grid involves all aspects of the power system. In recent years, on the basis of realizing the digitalization of substation-wide information, networking of communication platforms, and standardization of information sharing, advanced, reliable, integrated, low-carbon, and environmentally friendly smart electronic equipment is used to automatically complete the substation. The basic functions of information collection, measurement, control, protection, and metering, and the digital and intelligent sub...

Claims

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Application Information

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IPC IPC(8): H04L7/00
CPCH04J3/0641
Inventor 沈鑫曹敏王昕张林山
Owner YUNNAN POWER GRID COMPANY ELECTRIC POWER RES INST
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