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Bus redundancy control system in thermal power plant

A thermal power plant, bus redundancy technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as difficult to distinguish easily, long drag line distance, abnormal signal, etc., and achieve the effect of simple resolution

Inactive Publication Date: 2019-01-18
NANNING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In practice, it is found that because the PROFIBUS bus has a long distance between the terminal and the main console in the factory area, sometimes it is easy to cause signal anomalies due to the status of the site, and it is difficult to easily distinguish the abnormality of the terminal equipment. The signal is abnormal or the signal is abnormal caused by the abnormal transmission of the fieldbus signal

Method used

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  • Bus redundancy control system in thermal power plant
  • Bus redundancy control system in thermal power plant

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Embodiment Construction

[0018] The technical solution of the present invention is further described below, but the scope of protection is not limited to the description.

[0019] like figure 1 A thermal power plant bus redundancy control system shown includes a terminal wire selector and a master control wire selector; the terminal wire selector and the master control wire selector are sequentially connected to the bus between the terminal and the master console Above, between the terminal line selector and the master control line selector, the bus is divided into two lines, the first bus and the second bus. The first bus and the second bus are both PROFIBUS buses. The terminal has a terminal execution unit and a terminal The monitoring unit is connected to the bus; the terminal wire selector and the master control wire selector are controlled so that only one bus is connected to the first bus and the second bus at the same time; the master control wire selector is connected with a real-time analysis...

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Abstract

The invention provides a bus redundancy control system in thermal power plant. The bus redundancy control system comprises a terminal line selector and a total control line selector. The terminal lineselector and the total control line selector are sequentially connected to the bus between a terminal and a main console. The bus is divided into a first bus and a second bus between the terminal line selector and the total control line selector. The first bus and the second bus are both PROFIBUS buses. The terminal has a terminal execution unit and a terminal monitoring unit connected to the bus. The bus redundancy control system can distinguish whether the abnormality originates from the terminal device or the bus transmission by switching the conduction through the setting of the two-way bus. The way of distinguishing is extremely simple. The signal abnormality caused by the bus transmission is disappeared only by switching the conduction state of the bus. The signal abnormality causedby the terminal device still exists after switching the conduction state of the bus.

Description

technical field [0001] The invention relates to a bus redundancy control system of a thermal power plant. Background technique [0002] The PROFIBUS bus is widely used in the signal bus of industrial control. It is not only suitable for communication between automation systems and field signal units, but also can be used to directly connect transmitters, actuators, transmissions and other field instruments and equipment with interfaces. On-site signal collection and monitoring. [0003] In practice, it is found that because the PROFIBUS bus has a long distance between the terminal and the main console in the factory area, sometimes it is easy to cause signal anomalies due to the status of the site, and it is difficult to easily distinguish the abnormality of the terminal equipment. The signal abnormality is also the signal abnormality caused by the abnormal signal transmission of the field bus. Contents of the invention [0004] In order to solve the above-mentioned tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B9/03
CPCG05B9/03
Inventor 黄孝平文芳一黄文哲
Owner NANNING UNIV
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