DCS external-mounting intelligent control system and method based on fault-tolerant design

A technology of intelligent control system and DCS controller, which is applied in general control system, control/adjustment system, program control, etc., can solve the problems of poor reliability of DCS plug-in control system, and achieve the effect of high reliability and high quality integration

Pending Publication Date: 2019-03-26
XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD +1
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a DCS plug-in intelligen...

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  • DCS external-mounting intelligent control system and method based on fault-tolerant design

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Embodiment Construction

[0017] The present invention is described in further detail below in conjunction with accompanying drawing:

[0018] refer to figure 1 , the DCS plug-in intelligent control system based on fault-tolerant design of the present invention includes a DCS controller, a plug-in control system, a signal input module 6 and a signal output module 7, wherein the DCS controller includes a DCS automatic control module 1, a DCS Modbus communication module 2. Fault-tolerant control module 3, automatic tracking non-disturbance switching module 4 and signal processing module 5, the plug-in control system includes plug-in Modbus communication module 8, plug-in control module 9 and communication verification and fault-tolerant module 10; signal input module 6, signal processing Module 5 and DCS automatic control module 1 are connected in sequence; DCS automatic control module 1, automatic tracking non-disturbance switching module 4 and signal output module 7 are connected in sequence; signal pr...

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Abstract

The invention discloses a DCS external-mounting intelligent control system and method based on the fault-tolerant design. The system is characterized in that a signal input module, a signal processingmodule and a DCS automatic control module are sequentially connected; the DCS automatic control module, an automatic tracking undisturbed switching module and a signal output module are sequentiallyconnected; the signal processing module, a DCS Modbus communication module, an external-mounting Modbus communication module and an external-mounting control module are sequentially connected, a fault-tolerant control module is connected with the DCS automatic control module and the automatic tracking undisturbed switching module, and a communication verification and fault tolerance module is connected with the Modbus communication module and the external-mounting control module. The system and method disclosed by the invention can effectively solve a problem of poor reliability of the DCS external-mounting control system.

Description

technical field [0001] The invention belongs to the technical field of process control and automation, and relates to a DCS plug-in intelligent control system and method based on fault-tolerant design. Background technique [0002] With the implementation of denitrification and ultra-low emission transformation of thermal power plants, the actual NOx control effect of many thermal power units is not ideal, and even some thermal power units, the automatic control of denitrification and ammonia injection cannot be put into normal operation, resulting in large NOx fluctuations at the SCR outlet and ammonia escape. Serious problems such as excess volume. The root cause of this problem is that the conventional control algorithm of DCS cannot realize the optimal control of the denitrification system with nonlinear, time-varying and large disturbance characteristics. However, the conventional DCS plug-in control system does not have the high reliability of DCS itself. Contents o...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCG05B19/4184G05B2219/31088Y02P90/02
Inventor 武宝会薛大禹李刚
Owner XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD
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