基于plc鍋爐燃燒控制系統(tǒng)-資料下載頁
2025-06-27 18:31本頁面
【正文】 ensor output signal conditioning and amplification processing bee the standard signal of 0~5V, the EM231 module automatically plete the A/D converter.The physical characteristics of the S7200 PPI interface RS485 can work in the PPI, MPI, and free munication port mode. It provides a variety of options for munication between PC and PLC.For the realization of the manmachine dialogue function, such as system status and variable graphics, parameter changes, etc., but also extends a Eview500 series of touch screen, simple, convenient operation control, can be used to set system parameters, display the boiler temperature. There is an Ethernet module CP2431, whose role is to allow the S7200 directly connected to Ethernet via Ethernet longdistance exchange data with other S7200 for data transmission, munication based on TCPIP easy to install, simple.3 system software designControl procedures using the STEP 7Micro Win Software, ladder way to write its software block diagram shown in Figure 7.Figure 7 the main block diagram softwareS7200PLC given to a PID instruction, thus eliminating the need for plex PID algorithm programming process, which is the greatly facilitates the use of the user. Using the PID instruction has the following main points and experience:1 The scale factor and the integration time constant. Should be determined based on experience and repeated debugging.2 Adjust the volume, normalized to the quantitative output parameters of the standard conversion. 3 Fill in the correct order of the PID loop parameter table (LOOP TABLE), allocated to each parameter address.4 ConclusionsUnit power plant bustion process control system is put into use in a thermal power plant generating units boiler coordinated control system. The actual operation: fuzzy feedforward due to the introduction of the load, the boiler bustion control system as a coordination and control subsystem, the ability to follow the unit load changes significantly improve the oxyacetylene ratio consistent with the static and dynamic process。 to send the wind improve the control system logic control system with the smooth running and safety, the furnace pressure and reduce the fluctuations, to meet the demands of the run。 constant of the unit load, boiler bustion stability, each tune the parameters of dynamic deviation significantly reduce the achieve the optimization of bustion of the boiler。 nonlinear PID regulation to solve the shaking of the wind baffle.Siemens PLC control, not only simplifies the system, improve equipment reliability and stability, but also significantly improve the thermal efficiency of the bustion energy. Realtime changes in different conditions require the operator panel to modify the system parameters to meet a variety of information of the unit, such as work status, fault conditions can be audible and visual alarm and text form, the main control parameters (temperature) to the trend graph in the form of records to facilitate the operation and maintenance of equipment, the system versatility, scalability, intuitive and easy to operate.13
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