兆瓦级风机直流和交流电动变桨距技术

变速恒频风力发电机是当前风力机的主流机型,变桨距系统作为变速恒频风电机组控制系统的核心部件之一,可有效地保证风力发电机组安全、稳定、高效地运行.简要地介绍了风机变桨距系统的2种执行机构和风机变桨的工作原理,重点分析了电动变桨距系统的基本构成,以及直流伺服电机与交流伺服电机在电动变桨距系统中应用.通过比较直流伺服系统与交...

Study on the Electric Drive Pitch System of Megawatt Wind Turbine

The variable-speed constant-frequency(VSCF) wind generator is the main trend type of current wind generators.And as one part of the core components of VSCF wind generator control system,the pitch system can effectively ensure the safety,stability and efficient operation of the wind generator.In the paper,the principles and the two kinds of actuators of pitch control were briefly introduced,and the basic structures of electric drive pitch system were analyzed significantly.Besides,the applications of dc serv...