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Optimizing Method and Optimizing Structure of Fieldbus Network Segment in Distributed Control System dcs

A decentralized control system and field bus technology, applied in the field of automation systems, can solve problems such as poor control performance, poor stability, high engineering cost, and complex structure, and achieve the effects of saving equipment and cables, reducing engineering cost, and ensuring reliability

Active Publication Date: 2017-02-08
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this bus design structure needs to independently occupy the field bus PROFIBUS interface card interface of a pair of DPUs, and needs to add two pairs of optical fiber connection modules OLM modules, which has the defects of complex structure and high engineering cost.
When the network segment is laid, the engineering cost of the control system is high, and the control performance and stability are poor

Method used

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  • Optimizing Method and Optimizing Structure of Fieldbus Network Segment in Distributed Control System dcs
  • Optimizing Method and Optimizing Structure of Fieldbus Network Segment in Distributed Control System dcs

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Experimental program
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specific Embodiment 1

[0024] refer to figure 1 The fieldbus network segment optimization structure of the decentralized control system DCS involved in this embodiment includes a process control station DPU1 and a local communication box, and the redundant interface of the DCS side fieldbus of the process control station DPU1 is converted into an optical fiber interface and connected with the local The input end of the optical fiber interface of the communication box is connected, and the output end of the optical fiber interface of the local communication box is connected to the input end of the network segment conversion device PBLink5. The network segment conversion device PBLink5 has a network segment conversion structure; one of the output ends of the network segment conversion device PBLink Connect the DP network segment 2 of the field bus, and convert the DP network segment 2 into a single network; the second output terminal of the network segment conversion device PBLink5 is connected to the...

specific Embodiment 2

[0037] The fieldbus network segment optimization structure of the distributed control system DCS that the present embodiment relates to, its structure is characterized in that: the PA network segment 3 of the field bus utilizes the conversion equipment PB-Link5 by a plurality of nodes of the fieldbus DP network segment 2 Expand with the gateway 6 to realize the conversion of the same output fiber into multiple fieldbus PA network segment 3 output control ports, and realize the conversion of the same output fiber into multiple data signal output control ports in a tree topology.

[0038] All the other are with embodiment 1.

[0039] The present invention is applied by a power plant in Guangdong Province, bringing the following benefits and effects:

[0040] 1. Reduce the engineering cost of the control system, including:

[0041] 1) The PA network segment does not need to occupy the interface of the main station alone, which saves equipment; 2) saves two pairs of OLM modules f...

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Abstract

The invention discloses a field bus network segment optimization method and optimization structure of a DCS. The method and structure are suitable for network control of a power plant circulating water system or automatic systems in terms of the manufacturing industry, the process industry, transportation, buildings, electric power and the like. The method is characterized in that in a field bus of the DCS, one network segment is used as a main network segment which is converted into a single network through a network segment conversion device PBLink, one or more network segments besides the main network segment can serve as main network segment devices to be connected to the main network segment through the network segment conversion device PBLink, a communication access via which a field bus port card of a DPU is connected with the main network segment devices and one or more network segment devices besides the main network segment through an optical fiber connection module and the network segment conversion device PBLink is formed, and accordingly the network segment structure is simplified and cost is lowered. The invention further discloses the optimization structure of the optimization method. The equipment and cables are saved, control system engineering construction cost is greatly reduced, and meanwhile reliability of the network segments of the field bus is guaranteed.

Description

technical field [0001] The invention relates to a field bus network segment optimization method and optimization structure of a decentralized control system DCS, which is suitable for network control of a power plant circulating water system, or other automation systems in manufacturing, process industry, transportation, building, and electric power. It belongs to the technical field of power systems. Background technique [0002] At present, the distributed control system DCS fieldbus network segment layout structure, such as figure 2 As shown, the structure converts a pair of redundant interfaces of the PB card in OLM1-1 into optical fiber interfaces through a pair of redundant optical fiber connection modules OLM1-1 in the process control station DPU of the DCS control system, and lays them on site After that, the optical fiber interface is converted to PD bus interface 1-3 through a redundant optical fiber connection module OLM1-2 respectively, and the other redundant o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCY02P80/10
Inventor 吴国瑛黄冬兰刘宇穗徐征田健
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD