초록 ▼

A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field orien

A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.

대표청구항 ▼

1. A variable speed wind turbine having a plurality of blades comprising:a doubly-fed generator having a wound rotor; a power converter coupled to the wound rotor of the doubly-fed generator and having a LUT containing an encoded power-speed curve, wherein the power converter samples generator rotor

1. A variable speed wind turbine having a plurality of blades comprising:a doubly-fed generator having a wound rotor; a power converter coupled to the wound rotor of the doubly-fed generator and having a LUT containing an encoded power-speed curve, wherein the power converter samples generator rotor speed, updates a desired output power from the LUT using the generator rotor speed, determines a new torque based on an updated desired output power, and calculates a new current vector that is impressed upon the wound rotor; and a closed loop proportional, integral derivative (PID) pitch controller coupled to pitch the plurality of blades based on generator rotor speed.