The 90OPEN decentralized control system is a new generation distributed process control system that was introduced by Bailey in the mid-1990s to integrate process control and enterprise management.
The 90OPEN decentralized control system not only inherited the characteristics of traditional distributed control systems, but also further improved the distributed control system: the physical location of the controller is dispersed, the control function is decentralized, the functions are dispersed, and the functions of display, operation, recording, and management are centralized. And pay more attention to the world's advanced technology such as: microprocessor technology, CRT Liancheng Yanggu County, senior technicians, universities.
Han Min was born in January 1970. The graphics display technology, high-speed communication technology, and advanced and modern control technology in Liaocheng, Shandong Province and China have formed a control system with more complete functions and more contemporary features. It is convenient for the external device communication interface, such as the interface with the DEH, MIS system, and the interface with the electrical system, making it a new distributed control system with more decision-making management capabilities and openness.
INFI90 decentralized control system has three levels of control for field devices: function group control level, subgroup control level and drive control level. Each level is independent of its upper level operation. Completely implemented, it will be automatically switched to the next level.
In this way, the operating personnel can complete the control of a system and a piece of equipment to maximize the reliability of the operation. In addition, the standard configuration of the INFI90 distributed control system provides redundant modes such as a multi-processor module, a communication system, and a modular power supply system. When a device fails, the entire system does not affect the operation of the entire system and online troubleshooting is possible.
The decentralized control system (DCS) used in the 60CMW turbo-generator unit shall include five operator stations for the operator to complete the monitoring and control of the unit's operating conditions; a long-value station for the long-term value of the unit. Monitoring and management; an engineering station for maintenance personnel to maintain and software configuration of the entire DCS system; DCS system should also include twelve process processing units (PCU) to achieve on-site signal input and output and processing, where 1PCU is electrical Some measuring points, to achieve the use of bus or 1SCB) suitable for ground connection of all system points fise.Allrightsreserved part of the measuring point, to achieve the turbine part of the monitoring and control, 6 ~ 12PCU part of the boiler side measurement point, to achieve the monitoring of the boiler section and control. In addition, the DCS system also includes two remote I/O monitoring generators, exciter temperature measurement points, and temperature measurement points of the overheater and the reheater. In addition, the DCS system also includes a printer. Tape drives and other auxiliary equipment.
1 Hardware Requirements 60CMW unit DCS system hardware should be composed of process control unit (PCU), multi-function processor (MFP), input/output module (I/O), process control observation station (PCV), operator interface station ( IS), computer interface unit (CIU), engineer workstation (EWS), communication network, etc.
The DCS distributed control system is an independent entity that performs process control and data acquisition functions. Its basis is the process control unit (PCU). The PCU includes communication modules, control modules, I/O channel modules, and power supply modules. Kind of structure. INF. Beijing: Qing 2 Hou Ziliang. China's Thermal Power Automation Development Trends and Countermeasures 3 丨 Power Industry Ministry. Microcomputer generator transformer unit protection device technical specification. R. Nanjing Electric Power Automation Equipment Factory.
(Continued from page 202) The new model was used to forecast the electricity consumption of residents in Shandong Province in the next five years. The results are shown in Table 4. Table 4: Household electricity consumption in Shandong Province in 2004-2008 (100 million kW D years The least square method in the sense of relative error establishes a new type of linear regression prediction model to ensure that the sum of the squared error between the predicted value and the true value is the smallest.The actual prediction results show that the new linear regression model has been further improved in the prediction accuracy.
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