基于PLC和模糊理论的矿用通风机监控系统的开发研究
发布时间：2018-07-28 14:26
【摘要】：主通风机担负着向井下输送新鲜空气，稀释、排出危险气体的重任，从而对保证煤矿安全生产有着重要作用。当前煤矿对主通风机系统的监控大多数处于“监而不控”的状态，同时由于主通风机系统有大量的分散设备，在紧急情况下很难及时启动备用风机。并且当通风机电机启动的过程中，往往伴随着冲击电流，这将影响整个系统的安全运行。为了解决以上问题，论文基于PLC控制器，开发了一套高可靠性的风机集中监控系统，并同时基于模糊理论，提出了误差分级变论域模糊控制在异步电动机软启动的应用。 通过对主通风机系统工作流程和外围设备功能特点的分析，确立了监控系统要完成的监控任务，在此基础上根据各监控点的数据特点，完成了监控系统的硬件选型、各分散设备监控点的电路设计、分散设备与监控柜的数据连接以及监控柜的功能和供电设计，成功构建了PLC集中监控系统的整个硬件平台。在STEP7软件平台上，根据设计好的工作流程，组建了PLC和STEP7的通讯网络，然后根据分散设备的工作原理和电路设计分别开发了润滑油站、风门、高压开关柜、软启动柜等设备的监控程序，同时利用这些分散设备之间的逻辑互锁关系，完成了整个项目的PLC下位机监控程序的开发；在WINCC软件平台上，通过建立STEP7和WINCC的变量传输通道，以及对输入变量进行数据处理，分别开发了上位机主监控程序、各设备监控程序以及报警程序，完成了上位机WINCC监控程序的开发，实现了管理人员和操作系统的人机对话。 针对通风机电机传统启动方式存在的冲击电流问题，基于变论域模糊理论，提出了一种误差分级变论域模糊控制方案，，由该控制方案建立了电机启动模型，通过设计模糊控制模块、误差分级选择模块和脉冲调压模块，在Simulink平台上构建了基于误差分级变论域模糊控制电机软启动的整体仿真系统，仿真实验的结果表明：该方法对减少冲击电流有显著作用，并且其控制时间和控制稳定性优于一般模糊控制，适合于通风机电机的控制需求。
[Abstract]:The main ventilator is responsible for conveying fresh air, diluting and discharging dangerous gas to the mine, which plays an important role in ensuring the safe production of coal mine. At present, the monitoring of main ventilator system in coal mine is mostly in the state of "supervision but not control". At the same time, it is difficult to start the standby fan in time because of the large number of dispersing equipments in the main fan system. And when the fan motor starts, it is often accompanied by impulse current, which will affect the safe operation of the whole system. In order to solve the above problems, based on the PLC controller, a set of high reliability fan centralized monitoring system is developed in this paper. At the same time, based on the fuzzy theory, the application of error grading variable field fuzzy control in the soft start of asynchronous motor is proposed. Based on the analysis of the work flow of the main fan system and the functional characteristics of the peripheral equipment, the monitoring task to be completed by the monitoring system is established. On this basis, according to the data characteristics of the monitoring points, the hardware selection of the monitoring system is completed. The whole hardware platform of PLC centralized monitoring system is successfully constructed by the circuit design of the monitoring points of the distributed equipment, the data connection between the dispersed equipment and the monitoring cabinet, the function and power supply design of the monitoring cabinet. On the STEP7 software platform, according to the designed workflow, the communication network of PLC and STEP7 is set up, and then the lubricating oil station, the air valve and the high pressure switchgear are developed according to the working principle and circuit design of the dispersed equipment. At the same time, by using the logic interlocking relationship between these distributed devices, the PLC monitor program of the whole project is developed, and the variable transmission channel between STEP7 and WINCC is established on the WINCC software platform. And the data processing of input variables, the development of host monitor program, equipment monitoring program and alarm program, the development of upper computer WINCC monitoring program is completed, and the man-machine dialogue between manager and operating system is realized. In view of the impact current problem existing in the traditional starting mode of fan motor, based on the fuzzy theory of variable field, a fuzzy control scheme of error graded variable field is proposed, and the starting model of motor is established by the control scheme. By designing fuzzy control module, error grading selection module and pulse voltage regulating module, the whole simulation system of fuzzy control motor soft start based on error grade variable theory field is constructed on Simulink platform. The simulation results show that this method has a remarkable effect on reducing impulse current, and its control time and control stability are better than that of general fuzzy control, which is suitable for the control requirements of ventilator motor.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TD724
本文编号：2150513
[Abstract]:The main ventilator is responsible for conveying fresh air, diluting and discharging dangerous gas to the mine, which plays an important role in ensuring the safe production of coal mine. At present, the monitoring of main ventilator system in coal mine is mostly in the state of "supervision but not control". At the same time, it is difficult to start the standby fan in time because of the large number of dispersing equipments in the main fan system. And when the fan motor starts, it is often accompanied by impulse current, which will affect the safe operation of the whole system. In order to solve the above problems, based on the PLC controller, a set of high reliability fan centralized monitoring system is developed in this paper. At the same time, based on the fuzzy theory, the application of error grading variable field fuzzy control in the soft start of asynchronous motor is proposed. Based on the analysis of the work flow of the main fan system and the functional characteristics of the peripheral equipment, the monitoring task to be completed by the monitoring system is established. On this basis, according to the data characteristics of the monitoring points, the hardware selection of the monitoring system is completed. The whole hardware platform of PLC centralized monitoring system is successfully constructed by the circuit design of the monitoring points of the distributed equipment, the data connection between the dispersed equipment and the monitoring cabinet, the function and power supply design of the monitoring cabinet. On the STEP7 software platform, according to the designed workflow, the communication network of PLC and STEP7 is set up, and then the lubricating oil station, the air valve and the high pressure switchgear are developed according to the working principle and circuit design of the dispersed equipment. At the same time, by using the logic interlocking relationship between these distributed devices, the PLC monitor program of the whole project is developed, and the variable transmission channel between STEP7 and WINCC is established on the WINCC software platform. And the data processing of input variables, the development of host monitor program, equipment monitoring program and alarm program, the development of upper computer WINCC monitoring program is completed, and the man-machine dialogue between manager and operating system is realized. In view of the impact current problem existing in the traditional starting mode of fan motor, based on the fuzzy theory of variable field, a fuzzy control scheme of error graded variable field is proposed, and the starting model of motor is established by the control scheme. By designing fuzzy control module, error grading selection module and pulse voltage regulating module, the whole simulation system of fuzzy control motor soft start based on error grade variable theory field is constructed on Simulink platform. The simulation results show that this method has a remarkable effect on reducing impulse current, and its control time and control stability are better than that of general fuzzy control, which is suitable for the control requirements of ventilator motor.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TD724
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