Method for autonomously controlling PLC (Programmable Logic Controller) of wind generating set

The invention discloses a method for autonomously controlling a PLC (Programmable Logic Controller) of a wind generating set. The method comprises the following steps: S1, electrifying a PLC system to operate a system parameter initialization program; s2, executing the entry function according to a preset cyclic scanning period, and calling a corresponding module program according to the entry function; s3, after a start-up instruction is received, the fault condition is checked; s4, checking whether the wind speed meets a preset requirement or not; s5, whether the yaw angle meets the preset requirement or not is checked; s6, variable pitch is started, and whether the rotating speed meets the preset rotating speed value or not is checked in real time; and S7, starting the frequency converter, waiting for grid-connected operation, and completing the cyclic scanning control. 本发明公开一种风力发电机组PLC自主可控方法，其包括：S1：PLC系统上电运行系统参数初始化程序；S2：按照预设循环扫描周期执行入口函数，根据入口函数调用对应模块程序；S3：接收启机指令后检查故障情况；S4：检查风速是否满足预设要求；S5：检查偏航角度是否满足预设要求；S6：