Coordinated control of power converter and pitch angle for wind turbine generation system
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0556110
(2012-07-23)
|
등록번호 |
US-8749089
(2014-06-10)
|
발명자
/ 주소 |
- Arinaga, Shinji
- Wakasa, Tsuyoshi
- Matsushita, Takatoshi
- Yasugi, Akira
- Shibata, Masaaki
|
출원인 / 주소 |
- Mitsubishi Heavy Industries, Ltd.
|
대리인 / 주소 |
Kanesaka Berner & Partners, LLP
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
6 |
초록
▼
A wind power generation system is disclosed for suppressing an increase of torque when a voltage in a utility grid is restored, and to reduce a load to devices due to the torque. The wind power generation system includes a blade control unit for controlling the pitch angle of the wind turbine blades
A wind power generation system is disclosed for suppressing an increase of torque when a voltage in a utility grid is restored, and to reduce a load to devices due to the torque. The wind power generation system includes a blade control unit for controlling the pitch angle of the wind turbine blades such that the pitch angle matches a target pitch angle determined on the basis of at least one of a wind speed, a rotation speed of the power generator, and a requested output power when the power control unit re-actuates the operations of the converter and the inverter.
대표청구항
▼
1. A wind power generation system comprising: a power generator;wind turbine blades configured to receive wind and drive the power generator;a converter configured to convert an output of the power generator from a three-phase AC power into a DC power;an inverter configured to convert the DC power o
1. A wind power generation system comprising: a power generator;wind turbine blades configured to receive wind and drive the power generator;a converter configured to convert an output of the power generator from a three-phase AC power into a DC power;an inverter configured to convert the DC power outputted from the converter into a three-phase AC power;a power control unit configured to control the converter and the inverter on the basis of one of a rotor current of the power generator and a DC voltage of the DC power converted by the converter so that the converter and the inverter are de-actuated when said one of the rotor current and the DC voltage exceeds a corresponding threshold value, and the converter and the inverter are re-actuated when said one of the rotor current and the DC voltage is equal to or less than the corresponding threshold value;a blade control unit configured to control a pitch angle of the wind turbine blades;a crowbar circuit connected to a rotor coil of the power generator, and configured to be actuated in one of cases including:a current flowing through the rotor coil becomes equal to or greater than a previously-defined current threshold value, andthe DC voltage of the DC power converted by the converter becomes equal to or greater than a previously-defined voltage threshold value to cause a short-circuit in the rotor coil,whereinthe blade control unit is configured to control the pitch angle of the wind turbine blades,when the power control unit re-actuates the converter and the inverter, the blade control unit is configured to cause the pitch angle to match a target pitch angle determined on the basis of at least one of a wind speed, a rotation speed of the power generator, and a requested output power,the blade control unit is further configured to control the pitch angle of the wind turbine blades, when the crowbar circuit is actuated and when the power control unit de-actuates the converter and the inverter, to cause the rotation speed of the power generator to become equal to or greater than a synchronous rotation speed, andthe blade control unit is further configured to control the pitch angle of the wind turbine blades, when the crowbar circuit is de-actuated and when the power control unit re-actuates the converter and the inverter, to cause the pitch angle to match the target pitch angle determined on the basis of at least one of the wind speed, the rotation speed of the power generator, and the requested output power. 2. A method of controlling a wind power generation system, the system including: a power generator;wind turbine blades configured to receive wind and drive the power generator;a converter configured to convert an output of the power generator from a three-phase AC power into a DC power;an inverter configured to convert the DC power outputted from the converter into a three-phase AC power;a power control unit configured to control the converter and the inverter on the basis of one of a rotor current of the power generator and a DC voltage of the DC power converted by the converter so that the converter and the inverter are de-actuated when said one of the rotor current and the DC voltage exceeds a corresponding threshold value, and the converter and the inverter are re-actuated when said one of the rotor current and the DC voltage is equal to or less than the corresponding threshold value; anda crowbar circuit connected to a rotor coil of the power generator, and configured to be actuated in one of cases including:a current flowing through the rotor coil becomes equal to or greater than a previously-defined current threshold value, andthe DC voltage of the DC power converted by the converter becomes equal to or greater than a previously-defined voltage threshold value to cause a short-circuit in the rotor coil;the method comprising:controlling a pitch angle of the wind turbine blades, when the power control unit re-actuates the converter and the inverter, such that the pitch angle matches a target pitch angle determined on the basis of at least one of a wind speed, a rotation speed of the power generator, and a requested output power,said method comprising:controlling the pitch angle of the wind turbine blades, when the crowbar circuit is actuated and when the power control unit de-actuates the converter and the inverter, to cause the rotation speed of the power generator to become equal to or greater than a synchronous rotation speed, andcontrolling the pitch angle of the wind turbine blades, when the crowbar circuit is de-actuated and when the power control unit re-actuates the converter and the inverter, to cause the pitch angle to match the target pitch angle determined on the basis of at least one of the wind speed, the rotation speed of the power generator, and the requested output power.
이 특허에 인용된 특허 (6)
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Janssen, Wilhelm; Luetze, Henning; Buecker, Andreas; Hoffmann, Till; Hagedorn, Ralf, Low voltage ride through for wind turbine generators.
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Mikhail,Amir S.; Cousineau,Kevin L.; Howes,Lawrence H.; Erdman,William; Holley,William, Variable speed distributed drive train wind turbine system.
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Feddersen,Lorenz; Siebenthaler,Eckardt; Andresen,Bj철rn, Variable speed wind turbine having a passive grid side rectifier with scalar power control and dependent pitch control.
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Erdman William L. (Brentwood CA), Variable speed wind turbine with reduced power fluctuation and a static VAR mode of operation.
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Wakasa, Tsuyoshi; Yasugi, Akira; Matsushita, Takatoshi; Naka, Takehiro; Nakashima, Takumi, Variable-speed power generator and method of controlling the same.
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Guey,Zen Jey; Chang,Yun Yuan; Wu,Ching Huei, Wind turbine with self-contained power system.
이 특허를 인용한 특허 (1)
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Palomares Rentero, Pedro, Wind turbine rotational system.
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