基于PLC的风力发电机偏航控制系统设计.doc

前言IV基于PLC的风力发电机偏航控制系统设计摘要由于化石资源的日益枯竭和人类对全球环境恶化的倍加关注因此清洁绿色的风力发电技术已深受全世界的重视。本设计主要研究的偏航系统是风力发电机组的重要组成部分。由于偏航机构安装在机舱底部通过偏航轴承与机舱相连。当风向改变时风向仪将信号传到控制系统控制驱动装置工作小齿轮在大齿圈上转动从而带动机舱旋转是风轮对准风向。当机舱的旋转方向有接近开关进行检测当机舱向同一方向达到极限偏航角度时限位开关会及时将信号传到控制装置内控制装置会迅速发出信号使机组快速停机并反转解缆经过上述过程从而实现偏航控制使风轮始终保持迎风状态。根据边行系统的工作原理本设计所要解决的基本问题有：实现自动偏航控制及手动偏航控制的双控制系统设计设计偏航系统的制动装置以及扭缆、解缆保护装置的控制方法了解偏航液压系统的作用、工作原理和控制方法。编写驱动控制程序、扭缆、解缆保护程序。关键词：风向自动偏航风向仪偏航电机DesignofYawControlSystemforWindMotorBasedonPLCABSTRACTCleanandgreenwindpowertechnologyhasgottengreatattentionbytheworldbecauseoftheincreasinglyexhaustedfossilresourcesandthemoreattentionontheglobalenvironmentaldegradation.Thisdesignmainlyresearchestheyawsystemwhichisanimportantcomponentofthewindturbine.Becausetheyawmechanisminstalledatthebottomoftheengineroomandconnectedtotheengineroomthroughtheyawbearing.Whenthewindchangeswindvanewillsendthesignaltothecontrolsystemtocontrolthedrivework.Thepinionrotatedonthebiggearringwhichcanturntheengineroomtomakethewindwheelturbinesonthedirectionofthewind.Whentherevolvingdirectionoftheengineroomisclosedtotheswitchtododetectionandtheengineroomreachesthemaximumyawangletothesamedirectionthelimitedswitchwillsendthesignalstothecontroldeviceintime.Thenthecontroldevicecouldquicklysendasignaltomakethesetquickstopandturnoverthecastloop.Afterabovetheprocessitwillrealizetheyawcontrolandmakethewindwheelkeepthestateoffacingthewind.Accordingtotheworkingprincipleoftheedgesystemthisdesignshouldsolvetheproblemasfollow.1、Realizingthedoublecontrolsystemofautomaticyawcontrolandmanualyawcontrol;2、Designingthebrakedeviceofyawsystemandthecontrollingmethodsofprotectiondeviceofthebuttoncableandthecastloop;3、Understandingtheeffectofyawhydraulicpressuresystemworkingprincipleandthecontrolli