基于电压反馈式小型风力发电机限速发电控制系统研究

Study on control system for wind power by limiting speed based on the small wind generator with voltage feedback

根据风速变化而风力发电机输出电压也变化的原理,提出了一种以电压为反馈信号控制的方法,可实现风力发电机能在较佳状态下继续发电的同时,又能达到对风力发电机进行保护的目的。也就是说,当风速超过一定范围危及风力发电机时,能使风力发电机整体偏航到一个合适的角度,自动避开了主风向使风轮减速继续发电;反之,若风轮速度低于要求转速时,又能使风力发电机整体偏航自动寻找风向。

According to the principle that change of wind speed would influence output voltage of the wind generator, this paper puts forward a method that voltage can be used as the feedback control signal, which can protect the wind generator while the wind generator keeps powering with good performance. In other words, when the wind with the high speed which is over a certain range may endanger wind generator, the method can make the whole wind generator drift into a right angle, keep away from the big wind and reduce rotor speed to keep powering. Conversely, if the rotors speed below the re（1uirements of speed, this method can make the whole wind ~en^r~tr^r torn to th~ rlz, ht d;r,=oli tar^at;o^ll.,