Method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02P-009/04
F03D-009/00
출원번호
US-0920610
(2009-03-03)
등록번호
US-8610298
(2013-12-17)
국제출원번호
PCT/ES2009/000110
(2009-03-03)
§371/§102 date
20101110
(20101110)
국제공개번호
WO2009/112605
(2009-09-17)
발명자
/ 주소
Acedo Sánchez, Jorge
Cárcar Mayor, Ainhoa
Mayor Lusarreta, Jesús
Pérez Barbachano, Javier
Simón Segura, Susana
Solé López, David
Zabaleta Maeztu, Mikel
Marroyo Palomo, Luis
López Taberna, Jesús
출원인 / 주소
Ingeteam Power Technology, S.A.
대리인 / 주소
Sughrue Mion, PLLC
인용정보
피인용 횟수 :
4인용 특허 :
9
초록
The invention controls the network frequency via an active power reserve obtained by interacting in a coordinated manner with the speed regulation that acts on the power generated or on the pitch angle, to guarantee primary or secondary regulation across the whole range of wind speed.
대표청구항▼
1. A method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid, applicable to a variable pitch and a variable speed wind turbine, comprising, controlling the network frequency by guaranteeing a specific percentage of active power reserve, the active power
1. A method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid, applicable to a variable pitch and a variable speed wind turbine, comprising, controlling the network frequency by guaranteeing a specific percentage of active power reserve, the active power reserve being achieved by controlling, in a coordinated manner, speed regulation of the wind turbine by selectively performing one of: a) controlling an upper limit of a speed regulator that acts on the generated power of the wind turbine;b) controlling a lower limit of a speed regulator that acts on a pitch angle of the wind turbine, and;c) controlling both the upper limit of the speed regulator that acts on the generated power and the lower limit of the speed regulator that acts on the pitch angle;wherein, when controlling the upper limit of the speed regulator that acts on the generated power, the speed regulation comprises: calculation of a network frequency deviation with respect to a nominal value for the network frequency;calculation of the necessary active power reserve to compensate for the calculated frequency deviation;calculation of a maximum limit of power to be generated based on the calculated active power reserve and updating of the upper limit of the speed regulator that acts on the power generated; andoperation of the wind turbine by applying the updated limits to the speed regulator that acts on the wind turbine output;and wherein, when controlling the lower limit of the speed regulator that acts on the pitch angle, the speed regulation comprises: calculation of the network frequency deviation with respect to the nominal value for the network frequency;calculation of the necessary active power reserve to compensate for the calculated frequency deviation;calculation of a minimum pitch angle based on the calculated active power reserve and updating of the lower limit of the speed regulator that acts on the pitch angle; andoperation of the wind turbine by applying the updated limits to the speed regulator that acts on the pitch angle. 2. The method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid, according to claim 1, wherein the necessary active power reserve is obtained, through a regulator that acts based on the error frequency, by adding to the active power reserve corresponding to the nominal frequency of the wind turbine, an active power reserve increment corresponding to the error frequency. 3. The method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid, according to claim 2, wherein said regulator that acts based on the error frequency, is selected from among a proportional regulator, a proportional integral regulator and a complex transfer function. 4. The method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid, according to claim 1, wherein the active power reserve is obtained using the percentage of maximum power, and is used to generate the upper limit of the speed regulator that acts on the power generated. 5. The method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid, according to claim 1, wherein the calculation of the minimum pitch angle is obtained by: calculation of a range of points of operation of a turbine blade tip speed,obtaining a family of turbine rotor power-blade tip speed output coefficient curves that relate different optimal power coefficient percentages with an associated pitch angle for each blade tip speed in the calculated range,calculation of a current point of operation of blade tip speed, andinterpolation on the family of curves to obtain the minimum pitch angle. 6. The method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid, according to claim 1, wherein the active power reserve which corresponds to the nominal frequency is selectively calculated by a wind turbine controller and selectively received via a wind farm network. 7. The method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid, according to claim 1, wherein the active power reserve which corresponds to the nominal frequency is selectively assigned as a percentage of the producible power at a given time and a percentage of the nominal power. 8. The method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid, according to claim 1, wherein the active power reserve increases when the network frequency increases and decreases said active power reserve when the network frequency decreases. 9. A wind farm, comprising at least one variable pitch and variable speed turbine, wherein at least one of said variable pitch and variable speed turbines acts according to the method of claim 1. 10. The method of operation of a wind turbine to guarantee primary or secondary regulation in an electric grid, according to claim 1, wherein a) the active power reserve is obtained using the percentage of maximum power to generate the upper limit of the speed regulator that acts on the generated power; and whereinb) the calculation of the minimum pitch angle is obtained by: calculation of the range of points of operation of the turbine blade tip speed,obtaining a family of curves that relate different optimal power coefficient percentages with the associated pitch angle for each blade tip speed of the calculated range based on said turbine rotor power-blade tip speed output coefficient curves,calculation of the current point of operation of blade tip speed, andinterpolation of the family of curves to obtain the minimum pitch angle.
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이 특허에 인용된 특허 (9)
Arinaga, Shinji; Wakasa, Tsuyoshi; Matsushita, Takatoshi; Yasugi, Akira; Shibata, Masaaki, Coordinated control of power converter and pitch angle for wind turbine generation system.
Lopez Taberna, Jesus; Marroyo Palomo, Luis Maria; Sanchis Gurpide, Pablo; Gubia Villabona, Eugenio, Method and system of control of the converter of an electricity generation facility connected to an electricity network in the presence of voltage sags in said network.
Wakasa, Tsuyoshi; Yasugi, Akira; Matsushita, Takatoshi; Naka, Takehiro; Nakashima, Takumi, Variable-speed power generator and method of controlling the same.
Arlaban Gabeiras, Teresa; Alonso Sadaba, Oscar; Garcia Sayes, Jose Miguel; Royo Garcia, Ricardo; Nuñez Polo, Miguel, System and process for controlling active power in a power generation plant.
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