Systems and devices for controlling power generation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G05D-003/12
G05D-005/00
G05D-009/00
G05D-011/00
G05D-017/00
출원번호
US-0180897
(2011-07-12)
등록번호
US-8694172
(2014-04-08)
발명자
/ 주소
Kumula, Mario Joao
Freidl, Roman
출원인 / 주소
General Electric Company
대리인 / 주소
Fletcher Yoder P.C.
인용정보
피인용 횟수 :
1인용 특허 :
3
초록▼
Systems and devices for controlling power generation are provided. One system may include an electrical generator controller. The controller may include a filter component, a frequency response schedule component, and a rate limiter component. The filter component may receive a power grid frequency
Systems and devices for controlling power generation are provided. One system may include an electrical generator controller. The controller may include a filter component, a frequency response schedule component, and a rate limiter component. The filter component may receive a power grid frequency signal and output the frequency signal when the frequency signal is outside a frequency band. The frequency response schedule component may determine an ultimate target power contribution using the filtered frequency signal, the ultimate target power contribution representing an ultimate amount of power contribution that the electrical generator should provide in a primary frequency response. The rate limiter component may determine an immediate target power contribution signal that varies over time and approaches the ultimate target power contribution. Thus, the controller may control the approach rate and/or arrival time, and so forth, of the primary frequency response to a power grid frequency disturbance.
대표청구항▼
1. A controller for an electrical generator comprising: a filter component configured to receive a power grid frequency signal and to output the frequency signal when the frequency signal is outside a frequency band;a frequency response schedule component configured to determine an ultimate target p
1. A controller for an electrical generator comprising: a filter component configured to receive a power grid frequency signal and to output the frequency signal when the frequency signal is outside a frequency band;a frequency response schedule component configured to determine an ultimate target power contribution based at least partly on the filtered frequency signal, wherein the ultimate target power contribution represents an ultimate amount of power contribution that the electrical generator should provide in a primary frequency response; anda flexible rate limiter component configured to determine and provide an immediate target power contribution signal that varies over time and approaches the ultimate target power contribution based at least in part on a rate-limiting schedule, wherein the immediate target power contribution signal is configured to cause the electrical generator to increase or decrease a power output by the electrical generator by an amount corresponding to the immediate target power contribution signal, wherein the rate-limiting schedule comprises a lookup table that correlates the immediate target power contribution signal and the ultimate target power contribution, and wherein the frequency response schedule component or the rate limiter component, or both, are configured such that the immediate target power contribution signal causes the electrical generator to behave as another generator. 2. The controller of claim 1, wherein the electrical generator comprises an aero-derivative turbine generator. 3. The controller of claim 1, wherein the filter component comprises a dead band filter configured to output the frequency signal when the frequency signal is outside of a dead band frequency range. 4. The controller of claim 1, wherein the frequency response schedule component or the rate limiter component, or both, are configured such that the immediate target power contribution signal causes the electrical generator to simulate a steam generator. 5. The controller of claim 1, comprising a summation device configured to add the immediate target power contribution signal to a megawatt demand signal and to subtract a megawatt sense signal to result in a megawatt demand control-error signal. 6. A system comprising: a gas turbine configured to generate a torque; an electrical generator coupled to the gas turbine, wherein the electrical generator is configured to provide power to a power grid based on the torque; anda controller associated with the gas turbine, wherein the controller is configured to cause the gas turbine to vary the torque as a primary frequency response to a frequency signal on the power grid based at least in part on one of a plurality of immediate target power contribution signals, the controller comprising:one or more frequency filter components configured to receive the frequency signal and to output the frequency signal when the frequency signal is outside a frequency band;one or more frequency response schedule components each configured to receive the frequency signal and output a respective ultimate target power contribution signal, wherein each ultimate target power contribution signal represents an ultimate amount of power contribution that the electrical generator should provide in a primary frequency response; andone or more rate limiter components each configured to receive a respective ultimate target power contribution signal and determine one of the plurality of immediate target power contribution signals based at least in part on a rate-limiting schedule, wherein each of the plurality of immediate target power contribution signals is configured to cause the electrical generator to increase or decrease a power output by the electrical generator to a level indicated by that immediate target power contribution signal, wherein the rate-limiting schedule comprises a lookup table that correlates the immediate target power contribution signal and the ultimate target power contribution, and wherein the frequency response schedule component or the rate limiter component, or both, are configured such that the immediate target power contribution signal causes the electrical generator to behave as another generator. 7. The system of claim 6, wherein the controller comprises a selection component configured to enable user selection of the one of the plurality of immediate target power contribution signals upon which the primary frequency response of the electrical generator is based at least in part. 8. The system of claim 6, wherein the controller comprises a selection component configured to enable, via response determination logic, selection of the one of the plurality of immediate target power contribution signals upon which the primary frequency response of the electrical generator is based at least in part. 9. The system of claim 6, wherein at least one of the one or more rate-limiting schedules comprises an emergency response rate table. 10. The system of claim 6, wherein at least one of the one or more rate-limiting schedules is configured to simulate another primary frequency response of another electrical generator. 11. An article of manufacture comprising: one or more tangible, non-transitory machine-readable media having encoded thereon processor-executable instructions, the instructions comprising: instructions to receive a power grid frequency signal; instructions to determine when a frequency disturbance has occurred by determining when the power grid frequency signal is higher or lower than a dead band around a nominal frequency of the power grid;instructions to determine, when the frequency disturbance has occurred, an ultimate target power contribution based at least in part on a difference between the nominal frequency of the power grid and the power grid frequency signal, wherein the ultimate target power contribution represents an ultimate amount of power contribution associated with a primary frequency response of an electrical generator to the frequency disturbance; andinstructions to determine, when the frequency response has occurred, an immediate target power contribution signal based at least in part on the ultimate target power contribution and a time since the frequency disturbance occurred, wherein the immediate target power contribution represents an immediate amount of power contribution associated with the primary frequency response of the electrical generator to the frequency disturbance, wherein the instructions to determine the immediate target contribution signal comprise instructions to use a lookup table that correlates the immediate target power contribution signal and the ultimate power contribution signal;wherein the instructions to determine the ultimate target power contribution or the immediate target power contribution, or both, are configured to vary based at least in part on a current time, a current date, the power grid frequency signal, a current output power of the electrical generator, operator preferences, an operating specification, or a rule or regulation associated with the power grid, or some combination thereof. 12. The article of manufacture of claim 11, wherein the instructions to determine the ultimate target power contribution or the immediate target power contribution, or both, are configured to vary based at least in part on whether the frequency disturbance is determined to have occurred during the day or during the night. 13. The article of manufacture of claim 11, wherein the instructions to determine the ultimate target power contribution or the immediate target power contribution, or both, are configured to vary based at least in part on a season of the year. 14. The article of manufacture of claim 11, wherein the instructions to determine the ultimate target power contribution or the immediate target power contribution, or both, are configured to vary based at least in part on whether a brownout scenario is expected to be occurring. 15. The article of manufacture of claim 11, wherein the instructions to determine the ultimate target power contribution or the immediate target power contribution, or both, are configured to vary based at least in part on an operator selection. 16. The article of manufacture of claim 11, wherein the instructions to determine the ultimate target power contribution or the immediate target power contribution, or both, are configured to vary based at least in part on an amount of power contribution available from the electrical generator. 17. The article of manufacture of claim 11, wherein the instructions to determine the ultimate target power contribution or the immediate target power contribution, or both, are configured to vary based at least in part on a current load level on the power grid. 18. The article of manufacture of claim 17, wherein the load level comprises a base load, an intermediate load, or a peak load.
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이 특허에 인용된 특허 (3)
Martz Lyle F. (Verona PA) Kiscaden Roy W. (Springfield PA) Uram Robert (East Pittsburgh PA), Gas turbine and steam turbine combined cycle electric power generating plant having a coordinated and hybridized control.
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