基于PLC的风力发电控制系统设计

学号：2010509044浙江大学毕业设计（论文）题目基于PLC的风力发电控制系统设计学生学院专业班级校内指导教师专业技术职务校外指导老师专业技术职务二○一二年六月I基于PLC的风力发电控制系统设计摘要：近年来随着经济的不断发展和人们生活水平的不断改善，在世界范围内石油、煤炭这些不可再生资源的使用量已经大大超过环境所能承受的范围，燃烧发电厂产生的污染物也对地球环境产生了负影响。然而风能是一种清洁、可再生的能源，在发电这一领域具有巨大的开发潜力和商业活力。随着科技的不断进步，计算机和可编程控制的科研水平在提升，这对于风电控制的研究又提供了新的途径。针对风能具有随机性、不确定性的特点，本文用西门子可编程控制器S7-200来对风力发电进行控制。主要内容包括电气原理图和设计流程图的绘制，PLC、电气元件的选型，发电机组启动控制、偏航控制、温度控制和变压器控制等。在论文中给出详细的控制原理解释和各模块的功能介绍，并配有每一模块的控制程序。最后进行相关调试和仿真，利用STEP7-Micro/WIN32编程软件对PLC程序进行调试、仿真运行和在线诊断等，使仿真结果满足设计要求。关键词：风力发电；可编程控制器；偏航；温度控制IITheControlSystemofWindPowerBasedonPLCAbstract：Inrecentyears,withthecontinuousdevelopmentoftheeconomyandpeople’slivingstandardscontinuetoimprove,inthescopeofworldpetroleum,oilandcoalthesenon-renewableresourceconsumptionwassignificantlymorethantheenvironmentcanstand.Combustionpowergenerationofpollutantsgeneratedalsoproducednegativeeffecttotheenvironmentoftheearth.However,thewindenergyisaclean,renewableenergypowergeneration,ithastremendousdevelopmentpotentialandbusinessactivityinthisarea.Withtheprogressofscienceandtechnology,computerandprogrammablecontrolofthelevelofscientificresearchinascension,forwindpowercontrolresearchprovidesanewway.Inthispaper,aimingatthesecharacteristicsofuncertaintyandrandomnesswindenergy,wecanuseSiemensprogrammablecontrollerS7-200towindpowercontrol.Themaincontentsincludedrawingthecorrespondingelectricalschematicdiagramandtheflowchart,selectingthePLCandelectricalcomponents,turbinestart-upcontrol,yawcontrol,temperaturecontrol,transformercontrolandsoon.Inthispaper,itgivesdetailedexplanationofthecontrolprincipleandthefunctionofeachmoduleandcontrolprogram.Finally,itneedstestingandsimulation,usingofSTEP7-Micro/WIN32programmingsoftwareforthePLCprogramdebugging,simulationandonlinediagnosisandsoon,sothatthesimulationresultsmeetthedesignrequirements.Keywords：windpowergeneration;programmablecontroller;yaw;temperaturecontrolIII目录1.2.1国内发展状况..................................................................................................................21.2.2国外发展状况..................................................................................................................32.1.1风轮及其组件..................................................................................................................62.1.2机舱及其组件..................................................................................................................72.1.3塔架部件..........................................................................................................................82.1.4控制系统..........................................................................................................................82.2.1风速和风能......................................................................................................................93.1.1系统整体设计................................................................................................................103.1.2具体模块设计................................................................................................................113.2.1I/0地址分配...................................................................................................................193.2.2PLC的选型.....................................................................................................................193.2.3其他器件的选型............................................................................................................204.1.1PLC的基本结构.............................................................................................................224.1.2PLC的工作原理.............................................................................................................234.1.3PLC的特点.....................................................................................................................234.1.4PLC的应用.....................................................................................................................244.2.1发电机启动程序............................................................................................................244.2.2偏航控制程序................................................................................................................26摘要.........................................................................................................................................I目录......................................................................................................................................III1引言........................................................................................................................................11.1选题背景与意义.................................................................................................................11.2国内外发展现状.................................................................................................................21.3主要内容及章节安排.........................................................................................................42风电机组组成与风能理论............................................