Systems and methods for energy optimization for converterless motor-driven pumps
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04B-047/06
F04D-015/00
F04D-013/06
F04D-007/02
E21B-043/12
F04B-035/04
F04B-049/06
출원번호
US-0563119
(2014-12-08)
등록번호
US-9835160
(2017-12-05)
발명자
/ 주소
Torrey, David Allan
Hawes, Nathaniel Benedict
Aravind, Deepak
출원인 / 주소
General Electric Company
대리인 / 주소
Chakrabarti, Pabitra K.
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
A converterless motor-driven pump system includes an off-grid prime mover, an electric power generator driven by the off-grid prime mover to generate a power output, an electric submersible pump (ESP) system, and a system controller. The ESP system includes a motor coupled to the electric power gene
A converterless motor-driven pump system includes an off-grid prime mover, an electric power generator driven by the off-grid prime mover to generate a power output, an electric submersible pump (ESP) system, and a system controller. The ESP system includes a motor coupled to the electric power generator to receive the power output, and a pump driven by the motor to pump a fluid. The system controller includes a processor and a memory. The memory includes instructions that, when executed by the processor, cause the system controller to control the off-grid prime mover as a function of an operational parameter of the ESP system to maintain a desired operating point of the pump, and control the electric power generator to reduce the power output generated by the electric power generator while the desired operating point of the pump is maintained.
대표청구항▼
1. A converterless motor-driven pump system comprising: an off-grid prime mover;an electric power generator driven by said off-grid prime mover to generate power output;an electric submersible pump (ESP) system comprising a motor coupled to said electric power generator to receive the power output f
1. A converterless motor-driven pump system comprising: an off-grid prime mover;an electric power generator driven by said off-grid prime mover to generate power output;an electric submersible pump (ESP) system comprising a motor coupled to said electric power generator to receive the power output from said electric power generator;a pump driven by said motor to pump a fluid, said pump including an inlet; anda system controller comprising a processor and a memory, said memory including instructions that, when executed by said processor, cause said system controller to: control a rotational speed of said off-grid prime mover as a function of an operational parameter of said ESP system to maintain a desired operating point of said pump; andcontrol said electric power generator to reduce the power output generated by said electric power generator while the desired operating point of said pump is maintained,wherein said electric power generator comprises a synchronous generator and said power output is an alternating current (AC) power output,wherein said memory includes instructions that, when executed by said processor, cause said system controller to control said electric power generator to reduce the AC power output generated by said electric power generator by controlling an excitation current applied to said synchronous generator,wherein said memory further includes instructions that, when executed by said processor, cause said system controller to perturb the excitation current applied to said synchronous generator and observe the effect of the perturbed excitation current on the AC power generated by said electric power generator. 2. The converterless motor-driven pump system according to claim 1, wherein said memory includes instructions that, when executed by said processor, cause said system controller to determine a nominal excitation current to be applied to said synchronous generator as a function of a speed of said off-grid prime mover to maintain the desired operating point of said pump. 3. The converterless motor-driven pump system according to claim 2, wherein said memory includes instructions that, when executed by said processor, cause said system controller to determine an adjustment to the nominal excitation current and apply the adjustment to the nominal excitation current to produce an excitation command. 4. The converterless motor-driven pump system according to claim 3, wherein said memory includes instructions that, when executed by said processor, cause said system controller to compare a current AC power output to an earlier AC power output generated by said electric power generator, determine the adjustment to reduce the nominal excitation current if the current AC power output is greater than the earlier AC power output, and determine the adjustment to increase the nominal excitation current if the current AC power output is less than the earlier AC power output. 5. The converterless motor-driven pump system according to claim 3, further comprising a generator exciter configured to provide excitation current to said synchronous generator in response to the excitation command. 6. The converterless motor-driven pump system according to claim 1, wherein said memory includes instructions that, when executed by said processor, cause said system controller to control said electric power generator to reduce the AC power output by controlling an output voltage of said electric power generator. 7. A method of operating a converterless motor-driven pump system including an off-grid prime mover driving an electric power generator to produce a power output for an electric submersible pump (ESP) system including motor driving a submersible pump, said method comprising: controlling a rotational speed of the off-grid prime mover as a function of an operational parameter of the ESP system to maintain a desired operating point of the submersible pump;controlling a voltage output of the electric power generator to reduce the power output generated by the electric power generator while maintaining the desired operating point of the submersible pump,wherein the electric power generator comprises a synchronous generator, the power output is an alternating current (AC) power output, and controlling the voltage output of the electric power generator to reduce the AC power output generated by the electric power generator comprises controlling an excitation current applied to the synchronous generator,wherein controlling the voltage output of the electric power generator to reduce the AC power output generated by the electric power generator comprises determining an adjustment to the determined nominal excitation current, wherein determining the adjustment to the determined nominal excitation current comprises determining the adjustment to the determined nominal excitation current using a perturb and observe algorithm; anddetermining a nominal excitation current to be applied to the synchronous generator as a function of the speed of the off-grid prime mover to maintain the desired operating point of the pump. 8. A system controller for a converterless motor-driven pump system including a prime mover, an electric power generator driven by the prime mover to generate a power output, and an electric submersible pump (ESP) system including a motor powered by the power output and a pump driven by the motor, said system controller comprising a processor and a memory, said memory including instructions that, when executed by said processor, cause said system controller to: control a rotational speed of the prime mover as a function of an operational parameter of the ESP system to maintain a desired operating point of the pump; andcontrol the electric power generator to reduce the power output generated by the electric power generator while the desired operating point of the pump is maintainedwherein the electric power generator includes a synchronous generator, the power output is an alternating current (AC) power output, and said memory includes instructions that, when executed by said processor, cause said system controller to control the electric power generator to reduce the AC power output generated by the electric power generator by controlling an excitation current applied to the synchronous generator,wherein said memory further includes instructions that, when executed by said processor, cause said system controller to perturb the excitation current applied to the synchronous generator and observe the effect of the perturbed excitation current on the AC power generated by the electric power generator, wherein a direction in which the excitation current is perturbed is based, at least in part, on an observed effect of a previous perturbation of the excitation current. 9. The system controller according to claim 8, wherein said memory includes instructions that, when executed by said processor, cause said system controller to determine a nominal excitation current to be applied to the synchronous generator as a function of a speed of the prime mover to maintain the desired operating point of the pump. 10. The system controller according to claim 9, wherein said memory includes instructions that, when executed by said processor, cause said system controller to determine an adjustment to the nominal excitation current and apply the adjustment to the nominal excitation current to produce an excitation command. 11. The system controller according to claim 10, wherein said memory includes instructions that, when executed by said processor, cause said system controller to compare a current AC power output to an earlier AC power output generated by said electric power generator, determine the adjustment to reduce the nominal excitation current if the current AC power output is greater than the earlier AC power output, and determine the adjustment to increase the nominal excitation current if the current AC power output is less than the earlier AC power output.
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이 특허에 인용된 특허 (3)
Kim, Kiyong; Rao, Pranesh; Burnworth, Jeff, Digital excitation control system utilizing swarm intelligence and an associated method of use.
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