Method and system for switching main and standby synchronous clocks under BC (Basic Control) mode of PTN (Packet Transport Network) synchronous network of wide area protection system

A wide-area protection and clock synchronization technology, which is applied in time-division multiplexing systems, multiplexing communications, electrical components, etc. The effect of high time synchronization accuracy and easy maintenance

Inactive Publication Date: 2016-01-13
CHINA SOUTHERN POWER GRID COMPANY +1
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Problems solved by technology

[0006] One of the purposes of the present invention is to solve the problem that the error between the main synchronous clock and the standby synchronous clock in the time synchronization failover process between stations in the existing wide area protection system causes the wide area control and protection device to malfunction, and to provide a wide area protection system. Master and Standby Synchronization Clock Switching Method of Domain Protection System PTN Synchronization Network BC Mode

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  • Method and system for switching main and standby synchronous clocks under BC (Basic Control) mode of PTN (Packet Transport Network) synchronous network of wide area protection system
  • Method and system for switching main and standby synchronous clocks under BC (Basic Control) mode of PTN (Packet Transport Network) synchronous network of wide area protection system
  • Method and system for switching main and standby synchronous clocks under BC (Basic Control) mode of PTN (Packet Transport Network) synchronous network of wide area protection system

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specific Embodiment 1

[0041] refer to figure 1 and figure 2 , the main and standby synchronous clock switching system of the wide area protection system PTN synchronous network BC mode involved in this embodiment, including a wide area control and protection device master station 1, several wide area control and protection device sub-stations 2, and several PTN networks Device 3, main synchronous clock 4 and backup synchronous clock 5. Under normal conditions, the main station 1 of the wide-area control and protection device monitors and exchanges control signals with each sub-station 2, and the time control signal is sent by the main station of the wide-area control and protection device. 1 One-way transmission to each sub-station 2; refer to figure 2 , the main station of the wide-area control and protection device is connected to a PTN network device 3, and the PTN network device 3 is externally connected to the master synchronous clock 4; The sub-station 2 of the wide-area control and prote...

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Abstract

The invention provides a method and a system for switching main and standby synchronous clocks under a BC (Basic Control) mode of a PTN (Packet Transport Network) synchronous network of a wide area protection system. Wide area control protection devices of various substations are connected through a PTN network device and interstation time synchronization is realized by adopting a BC synchronizing function of a transmission IEEE1588V2 protocol; when the main synchronous clock has a fault, a time service interface of each wide area control protection device is cut off, and the standby synchronous clock is fast tracked in this time; and after time precision of the standby synchronous clock is determined, switching completion information is sent to all PTN network devices to realize time service of each wide area control protection device again. The method and the system have the characteristics of fast fault switching speed, high accuracy, good signal transmission quality and low time deviation ratio of each wide area control protection device in a fault process of the synchronous clock.

Description

technical field [0001] The invention relates to a method and a system for switching main and backup synchronous clocks in a BC mode of a PTN synchronous network of a wide area protection system, and is suitable for a wide area protection system communication network and a high-precision time synchronization system. It belongs to the technical field of power communication equipment. Background technique [0002] The wide-area protection system refers to a number of closely related substations as a region. The protection devices in the region are interconnected through optical fibers, and through information sharing, according to the network topology, the fault point can be quickly located, and the regional power grid can be intelligently protected and controlled. . [0003] Wide-area protection control can be defined as relying on the information of multiple points in the power system to quickly, reliably and accurately remove faults, and at the same time analyze the impact ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
Inventor 文安赵曼勇魏承志金鑫黄维芳朱海龙田霖叶睆牟敏黄盛卓越
Owner CHINA SOUTHERN POWER GRID COMPANY
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