Output control device and output control method for wind farm
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-003/00
F03D-007/02
F03D-007/04
H02J-003/38
H02J-003/48
출원번호
US-0902181
(2013-05-24)
등록번호
US-9515486
(2016-12-06)
발명자
/ 주소
Yasugi, Akira
Kii, Tsutomu
Baba, Mitsuya
Hori, Yoshiaki
출원인 / 주소
MITSUBISHI HEAVY INDUSTRIES, LTD.
대리인 / 주소
Kanesaka, Manabu
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
An output control device for a wind farm which includes n number of wind turbines includes a WTG output obtaining unit for obtaining a current output Pi of each of the wind turbines; an extractable output calculation unit for calculating an extractable output Pmaxi for each of the wind turbines; a p
An output control device for a wind farm which includes n number of wind turbines includes a WTG output obtaining unit for obtaining a current output Pi of each of the wind turbines; an extractable output calculation unit for calculating an extractable output Pmaxi for each of the wind turbines; a potential output calculation unit for calculating a potential output Ppoti of each of the wind turbines based on a difference between the extractable output Pmaxi and the current output Pi of each of the wind turbines; and a WTG output determination unit for determining an output command value of each of the wind turbines so that a total output PWF of the wind farm becomes closer to an output target value PWF*. The WTG output determination unit assigns an output increase amount to each of the wind turbines and to determine the output command value.
대표청구항▼
1. An output control device for a wind farm which includes n number, of wind turbines, n being an integer of two or more, the output control device comprising: a WTG output obtaining unit for obtaining a current output Pi of each of the wind turbines where i=1, . . . , n;an extractable output calcul
1. An output control device for a wind farm which includes n number, of wind turbines, n being an integer of two or more, the output control device comprising: a WTG output obtaining unit for obtaining a current output Pi of each of the wind turbines where i=1, . . . , n;an extractable output calculation unit for calculating an extractable output Pmaxi for each of the wind turbines where i=1, . . . , n, the extractable output Pmaxi being energy extractable from wind energy;a potential output calculation unit for calculating a potential output Ppoti of each of the wind turbines based on a difference between the extractable output Pmaxi and the current output Pi of each of the wind turbines where i=1, . . . , n; anda WTG output determination unit for determining an output command value of each of the wind turbines so that a total output PWF of the wind farm becomes closer to an output target value PWF*,wherein the WTG output determination unit is configured to assign an output increase amount to each of the wind turbines based on the potential output Ppoti of each of the wind turbines and to determine the output command value based on the output increase amount, when the output target value PWF* of the wind farm is greater than the total output PWF of the wind farm, andassign the output increase amount only to the wind turbines in which a rotor rotation speed has reached a rated rotation speed. 2. An output control device for a wind farm which includes n number of wind turbines, n being an integer of two or more, the output control device comprising: a WTG output obtaining unit for obtaining a current output Pi of each of the wind turbines wherean extractable output calculation unit for calculating an extractable output Pmaxi for each of the wind turbines where i=1, . . . , n, the extractable output Pmaxi being energy extractable from wind energy;a potential output calculation unit for calculating a potential output Ppoti of each of the wind turbines based on a difference between the extractable output Pmaxi and the current output Pi of each of the wind turbines where i=1, . . . , n; anda WTG output determination unit for determining an output command value of each of the wind turbines so that a total output PWF of the wind farm becomes closer to an output target value PWF*,wherein the WTG output determination unit is configured to assign an output increase amount to each of the wind turbines based on the potential output Ppoti of each of the wind turbines and to determine the output command value based on the output increase amount, when the output target value PWF* of the wind farm is greater than the total output PWF of the wind farm, andassign the output increase amount only to the wind turbines in which the potential output Ppoti is greater than a threshold value Ppotth where Ppotth>0. 3. The output control device for the wind farm according to claim 1, wherein the WTG output determination unit is configured to obtain the output command value for each of the wind turbines so that the output increase amount of each of the wind turbines is proportional to an amount of the potential output Ppoti. 4. The output control device for the wind farm according to claim 1, further comprising: a WTG output correction unit for correcting the output command value so that a sum of differences between the total output PWF and the output target value PWF* is at least partially compensated. 5. The output control device for the wind farm according to claim 4, wherein the WTG output correction unit is configured to correct the output command value only in a period excluding a transient period from a point when the output target value PWF* is updated to a point when the total output PWF reaches an updated value of the output target value PWF*. 6. The output control device for the wind farm according to claim 4, wherein the WTG output correction unit is configured to correct the output command value based on at least one of: the difference between the total output PWF and the output target value PWF*; a change rate of the total output PWF of the wind farm; a change rate of the current output Pi of each of the wind turbines where i=1, . . . , n; a difference between the current output Pi of each of the wind turbines and a current output command value Pouti; and a change rate of a wind speed for each of the wind turbines. 7. The output control device for the wind farm according to claim 1, further comprising: an output change rate controller for controlling an output change rate of the total output PWF of the wind farm,wherein the output change rate controller is configured to: limit a change rate of the total output PWF of the wind farm to a first change rate in a transient period from a point when the output target value PWF* is updated to a point when the total output PWF reaches an updated value of the output target value PWF*; andlimit the change rate of the total output PWF of the wind farm to a second change rate in a period excluding the transient period, the second change rate being greater than the first change rate. 8. The output control device for the wind farm according to claim 2, further comprising: an output change rate controller for controlling an output change rate of the total output PWF of the wind farm,wherein the output change rate controller is configured to: limit a change rate of the total output PWF of the wind farm to a first change rate in a transient period from a point when the output target value PWF* is updated to a point when the total output PWF reaches an updated value of the output target value PWF*; andlimit the change rate of the total output PWF of the wind farm to a second change rate in a period excluding the transient period, the second change rate being greater than the first change rate. 9. An output control method for a wind farm which includes n number of wind turbines, n being an integer of two or more, the output control method comprising the steps of: obtaining a current output Pi of each of the wind turbines, where i=1, . . . , n;calculating an extractable output Pmaxi for each of the wind turbines where i=1, . . . , n, the extractable output Pmaxi being extractable energy from wind energy;calculating a potential output Ppoti of each of the wind turbines based on a difference between the extractable output Pmaxi and the current output Pi of each of the wind turbines where i=1, . . . , n; anddetermining an output command value of each of the wind turbines so that a total output PWF of the wind farm becomes closer to an output target value PWF*,wherein, in the step of determining the output command value, when the output target value PWF* of the wind farm is greater than the total output PWF of the wind farm, an output increase amount is assigned to each of the wind turbines based on the potential output Ppoti of each of the wind turbines and the output command value is determined based on the output increase amount, andthe WTG output determination unit assigns the output increase amount only to the wind turbines in which a rotor rotation speed has reached a rated rotation speed.
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이 특허에 인용된 특허 (3)
Delmerico,Robert William; Cardinal,Mark Edward; Pierce,Kirk Gee, System and method for operating a wind farm under high wind speed conditions.
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