人人文库网 > 毕业设计 > 机械毕业设计英文外文翻译25Wincc在供热站恒压供水监控系统中的应用
机械毕业设计英文外文翻译25Wincc在供热站恒压供水监控系统中的应用.docx
机械毕业设计英文外文翻译25Wincc在供热站恒压供水监控系统中的应用
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机械毕业设计英文外文翻译25Wincc在供热站恒压供水监控系统中的应用,机械毕业设计英文翻译文献翻译
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附录 IV 外文文献翻译原文 Wincc in heating supply stapply stations Constant Pressure Monitoring System Application onstant voltage supply basic working principle System uses Automatic Frequency Control regulation or pump motor speed. Plus or minus pump.It is primarily by the Frequency Control System.PID regulator,pressure sensors,liquid level sensor power control circuits and other conponents.Host users control system or control board light over-the-counter transactions,buttons,switchto understand and control systen operation,Based on the PID control mode,the operator interface settings in water pressure,PLC to pressure settings and measured valucs for the deviation PID operation and regulation of distribution through inverter pump speed,so that water pressure was maintained at the set value. Systen hanlware configuration The system uses Siernens S7-200 PLC and its configuration software constitute a constant WinCC V6.0 Water pressure control system,water pressure monitoring process.Industroal Ethernct controller for PLC and the operator station computer communication betwween the Remote I/O network for the PLC and the operator station compuler communication betwween the Remote I/O network for the PLC controller and inverter,the soft starter of communication betwween equipment.PLC controller mainly used to monitor and control water and electricity systems.For1#-4#pressurized pump converter using the ABB Acs510-01-031A4 inverter,HMI operatostation selection DELL conputers,conputer,Industrial Ethernet server card Siemens conmmunications company CP1612. Software design of Systen The control system software company Siemens PCS7V5.2 package,STEP7V5.2 PLC controller mainly used to monitor and control water and electricity systems.For 1#4# pressurized pump converter using the ABB ACS510-031A4 inveter,HMI operatorstation selection DELL puter,Industrial Ethernet server card Siemens communications company Cp1612 Software design of System The control system software company Siemens PCS7V5.2 package.STEPV5.2 PLC controller.HMImonitoring system used WinCCV6.0 version.HMI server and operating station are using the Windows2000 operating system to have an open programming environment.Heating ntsSation Wincc configuration control software maior constant pressure water system and coal Gallery in two parts.Implemention of the system of automatic detection and automatic control.Detection constant pressure water and coal Gallcry equipment operation parameters.the real-time data acquisition.uploads.real-time data acquisition.uploads,real-time display and recording.Ciontrol unit operation.fault alarm and automatic parking operation .Theconstant pressureof water supply pressure system configuration parameters.real-time monitoring regulatory pressure pumps water pressure and so valued.CoalHanding Gallery in to control the volume.of coal to speed,to monitor the quality of coal (coal crushing degree of quality and impurity) PLC-Based Fuzzy Constant water suppl;y system design constant pressure water system components From the water supply system programmable controller,inverter,pressure transmiter,and the constact group on the pump unit and other components.Programmable controller selection of AB ControlLogix system.It includes Logix5550 controller,analog input modules,digital input and output modules and communication modutes.Which analog input modute used to test the water pressure on the export signal,digital input module and valves Kai stopped.Inverselection of AB 1336 Plus Inverter.Inverter and Devi2 cenet controller thtough the network for communication. Constant Pressure Water Principle The outlet channel of pressure sensor installation will export water pressure signals are converted to electrical signals, send PLC fuzzy inference operation, the output control signals to the converter, regulating the operation of pump motor speed, until the actual elimination of hydraulic pressure and set the deviation, constant voltage supply. Programmable controller can control pumps Kai stopped. When the system started working, inverter control from start on 1st pump frequency operation. If users increased consumption of the converter output frequency up to 50 Hz, the pressure will still be less than the set value, then after some time delay, on the 1st of the pump switching frequency operation; Inverter start again on the 2nd pump operation. If pressure is less than the set value, they will be on the 2nd to pump switching frequency operation; Inverter start again on the 3rd pump operation until the output pressure settings to achieve so far. However, if users to reduce water consumption, in accordance with the “ Kai-stop” principle will be followed with pumps. This cycle repeatedly to achieve constant pressure water system. nts Fuzzy2PI control algorithm As the water supply system in many areas (such as the pipe network and pumps) nonlinear, time-varying, and the variables still exist between the cross-coupling, so it is difficult to establish a precise mathematical system model. For such a complicated process that merely using the conventional PID control is difficult to achieve the desired control. Fuzzy control is not dependent on the mathematical model and the right parameters sensitive to the merits, Fuzzy used to control the water supply system, we can improve the control system dynamic performance. But Fuzzy Control System steady-state performance is poor, this design of a dual-mode Fuzzy2PI control, As shown in figure 2, and its design thinking is; when the pressure is greater error when using fuzzy control, to obtain good transient; When the pressure on the stead-state error into smaller, switched to process from PI control, to obtain good steady precision. PI control algorithms and fuzzy control algorithms are PLC, switching time by a computer program based on prior to the error autormatically. The system uses two-input single-output fuzzy controller. to pressure the desired value and the measurement of e error and the error as a fuzzy controller input linguistic variables, transducer frequency variation u language as output variables. To e error, the error rate ec and control volume u fuzzy subset of ( NB,NS,ZE,PS,PB) and they quantified the domain of seven grades, (-3,-2,-1,0,1,2,3). Fuzzy subset of the membership function used triangle. Initial experience of fuzzy control rules, as shown in table 1. Under these rules calculation of the total fuzzy relation R: Where x, U fuzzy relationship matrix on behalf of the “ Cartesian” and the “ and” operator. According minimax inference rules synthesis of output variables language domain of fuzzy sets U: U Finally, the weighted average method used for solutions vague and fuzzy volume U converted into precise amount u. The process is carried out offline, eventually Fuzzy Control Table, as shown in table 2. This form of the PLC memory storage, real-time control, fuzzy control would streamline the process for finding inquiries on the questionnaire process. Parametric Selection of Frequency-water system nts a reasonable selection pressure control parameters constant pressure to achieve energy-supply system. The realization of is this objective the key is pressure control parameter selection, usually pipe network pressure control point two choice: a pipe network is the most negative pressure on constant pressure control and the other is the constant pressure pump outlet. pressure control. How will the two choices, we have to analyze simple Network pressure on the most disadvantaged constant, the water pipe network by QMAX reduced to Q1, pumps reduce speed, and water characteristic curve of A (unchanged) at the intersection point C, pump characteristic curve downward, network pressure on the most disadvantaged H0. And the pump outlet pressure constant pressure control, Ha unchanged, reduce water consumption by QMAX QI and Ha to pay to point B, water characteristic curve upward A through B, the network most disadvantaged Hb pressure into points. Hb-H0 lift the poor namely, energy waste, so I chose the most disadvantaged network points for the smallest head pressure control parameters. Formation pressure on the closed-loop control system, making the pump speed and PID regulator set pressure match, achieve maximum energy-saving effect, but the constant pressure to achieve the purpose of water supply. the converter and put into operation after the commissioning of the system to ensure optimum operation of the state means necessary. According to the inverter load inertia size of the start and stop the motor when the time is not the same, Set time is too short to be accelerated when the inverter overcurrent, overvoltage decelerating protection; Set time will lead to excessive speed converter running in the system become regulate slow, delayed response, contingency ability is poor. Yi system at the state short-term instability. To protect the converter is not tripping, the scene of many of them using converter increases deceleration time setting too long, the problems they bring very easily be the appearance of the normal equipment and hide, but the converter operating in less-than-optimal state. So the scene when used according to the load driven by a different nature, testing out the permission of the shortest load increases deceleration time, setting. For the pump motor, plus deceleration time in the choice between 0.2-20 seconds. nts附录 V 外文文献翻译 Wincc 在供热站恒压供水监控系统中的应用 恒压供水基本工作原理 系统采用变频调速方式自动调节谁笨点击转速或加、减泵。它主要是由变频调速系统、PID、调节器、压力传感器、液位传感器、动力控制线路等组成，用户通过上位监控系统或控制柜面板上的指示灯、按钮、转换开关来了解和控制系统的运行。在基于 PID 的控制方式下，操作人员在操作界面设定供水压力， PLC 对压力设定值和测量值的偏差进行 PID 运算，并通过变频器调节配水泵系统转速，是供水压力保持在设定值。 2.系统的硬件配置 本系统采用西门子公司的 S7-200 系列 PLC 及其组态软件 Winccv6.0 构成恒压供水控制系统，实现供水过程的压力监控，工业以太网用于 PLC 控制器和计算机操作站之间的通讯，远程 I/O 网用于 PLC 控制器与变频器、软启动器的设备之间的通讯， PLC 控制权威主要用来检测和控制供水系统和供电系统、用于 1#4#加压泵的变频器采用 ABB 公司的ACS510-01-031A4 变频器， HMI 操作站选用 DELL 计算机，工控机。服务器的工业 以太网通讯网卡采用西门子公司的 CP1612. 3.系统的软件设计 本控制系统软件采用西门子公司的 PCS7V5.2 软件包， PLC 控制器采用 STEP7V5.2， HMI监控系统采用 Winccv6.0 版本， HMI 服务器和操作站都采用的是 Windows2000 操作系统具有开放的编程环境 . 供热站使用 Wincc 组态软件主要监控恒压供水系统和输煤廊两部分。实现对系统的自动检测和自动控制。检测恒压供水和输煤廊运行设备的各项参数，实现实时数据的采集、上传、实时显示和记录。控制机组运行、故障的自动停机和报警操作。在恒压供水系统设定供水压力参数，实时监控调节加压泵，使供水压力保持定值。在输煤廊中控制给煤量和给煤速度，检测给煤质量（煤的粉碎成都和含杂质量）。 基于 PLC 的模糊空盒子恒压供水系统设计 1. 恒压供水系统组成 供水系统又可编程控制器、变频器、压力变送器、接触器组和水泵机组等组成。可编程控制器选用 AB 公司的 ControLogix 系统，它包括 Logix5550 控制器、模拟量输入模块、数字量输入输出模块及通信模块，其中模拟量输入模块用来检测出水口压力信号，数字量输入模块用来检测各种开关量，数字量输出模块用来控制点击和阀门的启、停。变频器选用 AB公司的 1336Plos 变频器，变频器与控制器通过 Devi2 ceNet 网络进行通信。 2. 恒压供水原理 在出水管道上安装压力传感器，将出口水压力信号转换为电信号，送 PLC 进行模 糊推力运算后，输出控制信号到变频器，调节水泵点击的运转速度，知道消除实际谁呀与设定水压nts的偏差，实现恒压供水，可编程控制器同时控制水泵的启、停。当系统开始工作时由变频器控制启动 1 号泵变频运行。若用户用水量增加变频器的输出频率上升到 50Hz 水压仍达不到设定值，则将 2 号泵切换为工频运行 ;变频器再启动 3 号泵运转，知道输出水压达到设定值为止。繁殖托用户用水量减少，则依照“先启后停”原则一次将水泵切除 如此反复循环，实现系统的恒压供水。 3. Fuzzy2PI 控制算法 由于供水系统的许多环节（如管网和水泵）存在非线性、 时变性，且各个变量之间还存在交叉耦合，所以难以建立系统精确的数学模型，对于这样一个复杂的过程，仅仅用传统的PID 控制很难达到理想的控制效果。模糊控制具有不依赖于数学模型和对参数变化不敏感的优点，将模糊控制应用于供水系统中，可以提高控制系统的动态性能，但是模糊控制系统的稳态性能不佳，为此设计了一种 Fuzzy2PI 双模控制，如图 2 所示，其设计思想是：当压力误差较大时采用 Fuzzy 控制，以获得良好的瞬态响应；当压力误差较小进入稳态后，则由程序切换到 PI 控制，以获得良好的稳态精度， PI 控制算法和模糊控制算法均有 PLC 实现切换时机计算机程序根据事先给定的误差范围自动实现。 本系统采用双输入单输出模糊控制器，以水压给定值和测量值的误差 e 及误差变化率ec作为模糊控制器的输入语言变量，一变频器频率变化量 u作为输出语言变量。选取误差 e、误差率 ec 和控制量 u 的模糊自己为 NB,NS,ZE,PS,PB,并将它们的论域量化为 7 个等级，即-3， -2， -1， 0， 1， 2， 3，模糊子集的隶属函数采用三角形，根据现场经验总结出模糊控制规则，如表 1 所示。根据这些规则计算总的模糊关系 R: 式中 x、 U 代表模糊关系矩阵的“
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