In thewind turbineis running, due to changes in wind speed caused by the wind generatoroutput power changes, the control system should be capable of generating output power changes in the size of generators automatically switch so as to enhance the efficiency ofwind turbine

. Specific control methods are:

(1) Small generators to switch to large generators

In a small generator for power generation during the period of its output power control system to detect, if an instantaneous power within seconds a small generator rated power of more than 20% of the average power or 2 minutes, a certain large a particular value, then the of small wind turbines to switch to large generators. Switching process is: first, removal of compensation capacitor, and then a small off-grid generators, such as wind round of free rotation to a certain speed, another big generator to achieve the soft and networks; if the wind suddenly switching process is small, so that the wind wheel speed Instead, lower case, then the small generators should be soft and network re-run of small generators and the network.

(2) The large generators to switch to small generators

Inspection of large generator output power, if the average power of less than 2 minutes to set a value (this value should be less than the small generator rated power), or 50S instantaneous power than the other smaller settings , he immediately switch to small generators to run. Switching process is: excision of the compensation capacitor generators, off-grid, and then a small windimill generators  soft and network timing 20S, measuring the speed of small generators, if not reached after 20S small generator synchronous speed, then the shutdown, control system reset, re-start. If the 20S small generators within the speed has reached the speed of the bypass bypass thyristor soft-start device, then according to the system of input reactive power compensation capacitor.