增加了一次调频备用的启动频率。当系统频率发生变化时，机组一次调频启动，

Increased the starting frequency of a FM standby. When the system frequency changes, the unit will start with a frequency modulation and provide a certain frequency modulation as a backup. Due to the volatility of the power of the wind turbine, the wind speed change with time cannot be accurately judged, which may cause the frequent start of the FM standby, which greatly increases the starting frequency of the FM standby.

Added an FM alternate start-up frequency. When the frequency of the system changes, the unit starts FM at once, providing a certain amount of FM standby. Due to the fluctuation of wind turbine power, wind speed can not be accurately judged with time, which may cause FM backup frequent start-up, greatly increasing the frequency of FM backup start-up.

The starting frequency of primary frequency modulation standby is increased. When the system frequency changes, the unit will start the primary frequency regulation to provide a certain frequency regulation standby. Due to the fluctuation of wind turbine power, the change of wind speed with time can not be accurately judged, which may cause frequent start-up of FM standby and greatly increase the start-up frequency of FM standby.<br>