System, apparatus, and method for controlling load sharing of generator sets
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-003/46
G05F-001/66
출원번호
US-0380650
(2016-12-15)
등록번호
US-10243371
(2019-03-26)
발명자
/ 주소
Gerdes, Josenia Y.
Converse, Perry D.
Fox, Isaac E.
출원인 / 주소
Caterpillar Inc.
대리인 / 주소
Oblon, McClelland, Maier & Neustadt
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
A control system, apparatus, and method to control load sharing of multiple generator sets of a power supply system are described. Load transient set points to add an individual generator set can include a transient percentage threshold to characterize load transients as a load transient, a transien
A control system, apparatus, and method to control load sharing of multiple generator sets of a power supply system are described. Load transient set points to add an individual generator set can include a transient percentage threshold to characterize load transients as a load transient, a transient count threshold, and a transient count time period during which a detected number of load transients is compared with the transient count threshold. A controller can determine whether to add the individual generator set based on whether the detected number of load transients is equal to the transient count threshold within the transient count time period and control addition of the individual generator set responsive to the detected number of load transients equaling the transient count threshold.
대표청구항▼
1. A control system to control load sharing of a plurality of generator sets of a power supply system, the control system comprising: memory configured to store data regarding first load transient set points to add an individual generator set of the plurality of generator sets for load sharing of a
1. A control system to control load sharing of a plurality of generator sets of a power supply system, the control system comprising: memory configured to store data regarding first load transient set points to add an individual generator set of the plurality of generator sets for load sharing of a load drawing power from the power supply system, the first load transient set points to add the individual generator set including: a first transient percentage threshold to characterize load transients as a load transient for adding the individual generator set of the plurality of generator sets for load sharing of the load,a first transient count threshold for adding the individual generator set for load sharing of the load, anda first transient count time period during which to compare a detected number of load transients for adding the individual generator set to the first transient count threshold; anda controller in communication with the memory, the controller configured to: determine whether to add the individual generator set for load sharing of the load based on whether the detected number of load transients for adding the individual generator set is at least equal to the first transient count threshold within the first transient count time period, andcontrol addition of the individual generator set for load sharing responsive to the detected number of load transients for adding the individual generator set equaling the first transient count threshold during the first transient count time period. 2. The control system of claim 1, wherein the memory is configured to store data regarding second load transient set points to remove the individual generator set of the plurality of generator sets from load sharing of the load,wherein the second load transient set points to remove the individual generator set include: a second transient percentage threshold, less than the first transient percentage threshold, to characterize load transients as a load transient for removing the individual generator set from load sharing of the load,a second transient count threshold for removing the individual generator set from load sharing of the load, anda second transient count time period during which to compare a detected number of load transients for removing the individual generator set to the second transient count threshold, andwherein the controller is configured to: determine whether to remove the individual generator set from load sharing of the load based on whether the detected number of load transients for removing the individual generator set is less than the second transient count threshold within the second transient count time period and whether all steady state conditions for removing the individual generator set are met, andcontrol removal of the individual generator set from load sharing based on the detected number of load transients for removing the individual generator set being less than the second transient count threshold at the end of the second transient count time period, and all of the steady state conditions for removing the individual generator set being met. 3. The control system of claim 2, wherein the second transient count threshold is equal in value to the first transient count threshold and/or the second transient count time period is equal in value to the first transient count time period. 4. The control system of claim 2, wherein the steady state conditions include: steady state drop thresholds and time delays,one or more redundant strategies, andremoving the individual generator set does not increase the load above a steady state add threshold. 5. The control system of claim 1, wherein the determining whether to add the individual generator set for load sharing of the load includes determining whether any generator sets of the plurality of generator sets are available to add for load sharing, andwherein the controlling addition of the individual generator set for load sharing occurs only when the controller determines that at least one generator sets of the plurality of generator sets is available to add for load sharing. 6. The control system of claim 1, wherein the controller controls addition of the individual generator set for load sharing such that only one generator set, the individual generator set, is added. 7. The control system of claim 1, wherein a timer to count the first transient count time period begins upon detection of a first detected load transient for adding the individual generator set after reset of the timer to count the first transient count time period. 8. The control system of claim 1, wherein a counter corresponding to the detected number of load transients for adding the individual generator set and a timer corresponding to the first transient count time period are reset when the controller adds the individual generator set for load sharing. 9. The control system of claim 1, wherein the added individual generator set has a next priority relative to any other generator set, of the generator sets, available to add for load sharing. 10. The control system of claim 1, wherein the controller is configured to add the individual generator set for load sharing if all steady state conditions for adding the individual generator set are met, even if the detected number of load transients for adding the individual generator set do not equal the first transient count threshold during the first transient count time period. 11. The control system of claim 1, wherein the first load transient set points are stored in the memory responsive to a user input at a user interface. 12. A computer-implemented method of controlling a plurality of generator sets of a power supply system, the computer-implemented method comprising: determining whether to bring online a generator set, of the plurality of generator sets, to provide power to a load already being provided with power by at least one other generator set of the plurality of generator sets, based on whether a detected number of load transients above a first preset magnitude is at least equal to a first transient count threshold within a first transient count time period; andbringing online the generator set responsive to the detected number of load transients above the first preset magnitude equaling the first transient count threshold during the first transient count time period. 13. The computer-implemented method of claim 12, wherein the preset magnitude, the first transient count threshold, and the first transient count time period are reconfigurable set points for bring online the generator set. 14. The computer-implemented method of claim 12, further comprising: determining whether to take offline the generator set based on whether a detected number of load transients above a second preset magnitude is less than a second transient count threshold within a second transient count time period; andtaking offline the generator set based on the detected number of load transients being less than the second transient count threshold. 15. The computer-implemented method of claim 14, wherein the taking the generator set offline occurs only when the detected number of load transients is less than the second transient count threshold and all steady state conditions to take the generator set offline are met. 16. The computer-implemented method of claim 15, wherein the steady state conditions include: steady state drop thresholds and time delays,one or more redundant strategies, andremoving the individual generator set does not increase the load above a steady state add threshold. 17. The computer-implemented method of claim 12, further comprising receiving signals from a user interface to store in memory reconfigurable set points corresponding to the first preset magnitude, the first transient count threshold, and the first transient count time period. 18. The computer-implemented method of claim 12, further comprising bringing online the generator set if all steady state conditions for bringing online the generator set are met, even if the detected number of load transients above the first preset magnitude are below the first transient count threshold during the first transient count time period. 19. The computer-implemented method of claim 12, further comprising resetting a counter corresponding to the detected number of load transients above the first preset magnitude and a timer corresponding to the first transient count time period are reset after bringing online the generator set. 20. A power supply system comprising: a plurality of generator sets electrically coupled to a load to provide electric power to the load, each generator set being communicably coupled to each of the other generator sets via an ethernet connection;a user interface to receive a first plurality of load transient set points to add a first generator set of the plurality of generator sets to provide electric power to the load and to receive a second plurality of load transient set points to remove a second generator set of the plurality of generator sets from providing electric power to the load,the first plurality of load transient set points including: a first transient percentage threshold to characterize load transients as a load transient for adding the first generator set to provide electric power to the load,a first transient count threshold to add the first generator set to provide electric power to the load, anda first transient count time period during which to compare a detected number of load transients to add the first generator set to the first transient count threshold, andthe second plurality of load transient set points including: a second transient percentage threshold, less than the first transient percentage threshold, to characterize load transients as a load transient to remove the second generator set from supplying electric power to the load,a second transient count threshold to remove the second generator set from providing electric power to the load, anda second transient count time period during which to compare a detected number of load transients to remove the second generator set to the second transient count threshold;memory to store data corresponding to the first plurality of load transient set points to add the first generator set to provide electric power to the load and to store data corresponding to the second plurality of load transient set points to remove the second generator set from providing electric power to the load; anda controller in communication with the memory and communicably coupled to each of the generator sets via the ethernet connection, the controller configured to: determine whether to add the first generator set to provide electric power to the load based on whether the detected number of load transients to add the first generator set is at least equal to the first transient count threshold within the first transient count time period,add the first generator set to provide electric power to the load responsive to the detected number of load transients to add the first generator set equaling the first transient count threshold during the first transient count time period,determine whether to remove the second generator set from providing electric power to the load based on whether the detected number of load transients to remove the second generator set is less than the second transient count threshold within the second transient count time period and whether all steady state conditions to remove the generator set are met, andremove the second generator set from providing electric power to the load based on the detected number of load transients to remove the second generator set being less than the second transient count threshold at the end of the second transient count time period, and all of the steady state conditions to remove the second generator set being met,wherein the first generator set and the second generator set are either the same generator set or different generator sets.
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이 특허에 인용된 특허 (5)
Eaton, Zane C.; Bornemann, Kenneth R., Adaptive control of an electrical generator set based on load magnitude.
Folken, Keith Ronald; Dvorsky, Michael Allen; Boley, Julie Lynn; McBurney, James Dean; Black, Andrew William; Zwetz, II, David Lee; Nofsinger, Stephen Charles, Power system with multiple generator sets.
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