| This paper is subject to national emphasized groundwork research item named conception validation about the new process of coal translation and optimization integration of the process, and it focuses on the research of the monitoring and controlling system of Circulation Fluidized Bed(CFB) Multi-generation test-bed according to the test-bed project of Zhejian University Institute of Thermal Power Engineering CFB Multi-generation System Combining Combustion & Gasification test-bed, while considering an utilizing advanced technology and experience domestically and abroad. The key points of this paper include the design of software and hardware of the system, and the realization of automatic control function.The monitoring and controlling system adopts a total distributed control system (DCS) constituted by a programmable logic controller (PLC) . a computer (PC) and thermal power engineering signal sensors, sender, controller, etc . PLC is used to collect data and perform automatic control partly, while PC is adopted to monitor the operation process , analyze data by communicating with PLC and automatic control mostly. This system enables the control system to be operating safely, reliably and economically, and then brings many conveniences to the operator.This paper contents software development of PLC and PC. The software for PC developed by Visual C++ proves to be effective and friendly to operators, which can realize many functions such as process display, list-display of operation parameters, alarming, history querying, automatic creation of worksheet, and trend monitor, etc. The software for PLC programmed by STEP 7, which can successfully detects signals and controls the loops.The design of an automatic control system for the test-bed is also included in this paper. The system uses intelligent PID controller to design all automatic control loops, and performs the adjustment of PID parameters. |
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