Intelligent substation network sampling time synchronization method

A smart substation and network sampling technology, applied in electrical components, time-division multiplexing systems, multiplexing communications, etc., can solve problems such as system failure and improve reliability

Inactive Publication Date: 2015-01-21
XJ ELECTRIC +3
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for sampling and timing in a smart substation network, so as to solve the problem that once the timing device is abnormal in the current smart substation network, the system cannot operate normally

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Embodiment Construction

[0017] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] The purpose of the present invention is to provide a network time synchronization method that does not depend on the clock system. The time synchronization method adopts the IEEE-1588 protocol, and the clock or the central switch is automatically selected by the time service device as the master clock according to the clock priority. The clock device and the time-serving equipment such as protection, measurement and control equipment are connected to the central switch and interval switch of the process layer network at the same time. The central switch here is the core of the intelligent substation equipment and is the central switch of the star network, such as figure 1 As shown, the clock device is set as the master clock, and the clock mode of the central switch is set as the boundary clock. The boundary clock means that this devic...

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Abstract

The invention relates to an intelligent substation network sampling time synchronization method and belongs to the technical field of power system automation. A center switch serves as a boundary clock; when a master clock works normally, the boundary clock serves as a slave clock to receive a time synchronization command of the master clock; and when the master clock works abnormally, the boundary clock serving as the slave clock functions as the master clock to carry out time synchronization on equipment to be subjected to time service. The method helps to solve the problem of dependence on the clock device of the protection device in network sampling; and when the clock device breaks down, the devices, such as the protection device and the like, can still work normally, thereby improving operation reliability of a system and providing technical support for popularization of the network sampling technology.

Description

technical field [0001] The invention relates to a time synchronization method for intelligent substation network sampling, which belongs to the technical field of power system automation. Background technique [0002] The core technological innovation of the intelligent station is to use network technology to replace traditional secondary wiring to transmit digital and analog signals. However, some key technical problems in network communication at this stage have affected reliability. In order to avoid these technical problems, existing smart substations have adopted relatively conservative solutions. The one-to-one connection scheme, the only difference is that the cable is replaced by an optical cable, which is the so-called "direct mining and direct jumping scheme". [0003] The "direct mining and direct jumping" scheme of the protection device can ensure the real-time and reliability of information transmission, but it is difficult to realize networked information shar...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
Inventor 刘永欣席亚克陶永健杜军王雷涛姜帅张仑山牛强李栋
Owner XJ ELECTRIC
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