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The communication method of the distributed PC bus protection without the main station

A busbar protection and communication method technology, applied in signal transmission systems, electric vehicles, instruments, etc., can solve the problems of low communication rate, poor real-time performance, difficult to apply, etc., achieve the effect of reducing investment and overcoming high network transmission rate requirements

Active Publication Date: 2007-07-11
NARI TECH CO LTD +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0019] The advantage of this method is that the communication rate is lower than that of the serial method; the disadvantage is that the fault judgment is judged by the final unit, and the action of each unit is determined according to the judgment result. The real-time performance is poor, and its essence is still a bus with a master station. Protection mode, unable to realize the advantages of distributed busbar protection without a master station
[0020] The above two forms of distributed busbar protection communication without a master station have their shortcomings, and they are still in the experimental stage, so it is difficult to apply them to actual projects.

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  • The communication method of the distributed PC bus protection without the main station
  • The communication method of the distributed PC bus protection without the main station

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Embodiment Construction

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and examples. However, the invention is not limited to the examples given.

[0029] As shown in Figure 3, in embodiment 1, taking n=4 as an example, the closed loop network formed by the 4 microcomputer busbar protection units that keep synchronous sampling connected successively, the communication method of its real-time distribution sampling data is: the sampling data is in The protection units are circulated in a fixed direction, assuming that the data transmission direction is determined by p 1 passed to p 2 ,p 2 passed to p 3 ,p 3 passed to p 4 ,p 4 passed to p 1 , that is, transfer in the counterclockwise direction, let t be the sampling period, when the sampling frequency is 1200Hz, the calculated sampling period t=833μs, when the sampling frequency is 2400Hz, the calculated sampling period t=417μs, T can be any The sampling time, such as 8:00 Beiji...

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Abstract

This invention relates to micro computer bus wire communication method without host station, wherein, each protection unit sample data are sent by one fix direction recycle within T,Tat; the protection unit Pi receives last protection unit sent n-1 protection units at sample time and the orderly sample time data message; the protection unit Pi sends n-1 protection unit without protection unit to next protection unit at sample time for different sample time data message.

Description

technical field [0001] The invention relates to a communication method for microcomputer busbar protection in an electric power system, in particular to a communication method for distributed microcomputer busbar protection without a master station. Background technique [0002] The bus bar is an important part of power plants and substations, an extremely important component in the power system, and a hub for power generation, transmission, transformation, and power supply. Generators, transformers, transmission lines, power supply lines and other equipment in power plants and substations all function through the busbar. The reliability of the busbar work will affect the safe and stable operation of the power system. [0003] Microcomputer relay protection has strong self-check function and convenient operation and maintenance, so it is welcomed by users and has been rapidly popularized and applied. Compared with analog protection, microcomputer bus protection has many ad...

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Application Information

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IPC IPC(8): H02J13/00H02J7/26G08C19/00
CPCY04S40/143Y02E60/7884Y02E60/00
Inventor 吴骞顾欣欣施玉祥
Owner NARI TECH CO LTD