Large Vscf Wind Turbine Control Principle

In this article the up to date new type generator applied in wind electric po~ver generation is introduced all-round and we also analysed its operational principle when leading a variable velocity-constant frequency operation. The article interpreted the difference between AC excitation double-feedback generator and synchronous and asynchronous generator and also analysed the balance of its energy and thus deduced the mathematic model on d-q reference frame about excitation double-feedback generator. The article also analysed and simuluated its torque regulating characteristic and power regulating characteristic ,We have sloved the problem of being not able to control coupling of active power and reactive po~ver of AC excitation double-feedback generator independently by using the vector control and at the same time we pz~ovided a control equation with concise form and project easy to achieve . The article ~i:ialysed wind electric POWC~ generation 憇 capacity when leading phase opcration and the process of connect with power network as wind electric power generation . We hope it can be a effective theory on this kind of wind electric power generator for future design or control...