System for and method of frequency control of variable-speed wind power generator
AssigneeGreen Energy Institute
InventorsHyenjun Choi, Jihoon Park, Hyewon Choi
Life of this patent
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Abstract
A system for and a method of frequency control of a variable-speed wind power generator are proposed. According to an implementation example of the present technology, there is an advantage in which the present technology may be involved in a frequency control of the system, thereby stabilizing the frequency of the system by controlling the frequency of the variable-speed wind power generator on the basis of a gain being varied according to a speed of a rotor.
Claims4
A system for frequency control of a variable-speed wind power generator, the generator comprising a rotor, a maximum output control loop, and a frequency deviation loop, the system comprising:
- a maximum output control loop unit calculating output of the maximum output control loop according to a speed of the rotor;
- a frequency deviation loop unit calculating output of the frequency deviation loop based on a gain that changes according to a frequency deviation of the system and the speed of the rotor;
- and
- a controller calculating a reference output of the variable-speed wind power generator as the sum of the output of the maximum output control loop and the output of the frequency deviation loop and controlling a converter controller on the rotor side based on an output limit range and the reference output of the variable-speed wind power generator,
- wherein the gain is calculated based on the output calculated from the maximum output control loop, the output calculated from the frequency deviation loop, and a predetermined speed of the rotor.
A method of frequency control of a variable-speed wind power generator, the generator comprising a rotor, a maximum output control loop, and a frequency deviation loop, the method comprising:
- calculating output of the maximum output control loop according to a speed of the rotor by a maximum output control loop unit;
- calculating output of the frequency deviation loop based on a gain that changes according to a frequency deviation of the system and the speed of the rotor by a frequency deviation loop unit;
- and
- calculating a reference output of the variable-speed wind power generator as the sum of the output of the maximum output control loop and the output of the frequency deviation loop, and controlling a converter controller on the rotor side based on an output limit range and the reference output of the variable-speed wind power generator by a controller,
- wherein the gain is calculated based on the output calculated from the maximum output control loop, the output of the frequency deviation loop, and a predetermined speed of the rotor.
Dependencies are inferred from the claim text.