jingjingliu2018
commented
5 years ago It seems strange that the correlation is much better in the case of dynamic regulation (which is supposed to be harder) than it is with traditional regulation. Did you discuss this on the call today? What is the refrigeration technology we are modeling for - commercial refrigeration?
On Tue, May 14, 2019 at 4:27 AM DavidWiniarski-pnnl < notifications@github.com> wrote:
@ORNLJD https://github.com/ORNLJD @jingjingliu2018 https://github.com/jingjingliu2018
Traditional_Regulation / Refrigeration Drive cycle file: 08 2017 Traditional.csv Time: 08/01/2017 16:00 to 18:59 Sim Step: 2s Service Wt. 0.75 Assigned Service MW: 1875 MW
[image: image] https://user-images.githubusercontent.com/44621661/57693342-d90a0900-75fd-11e9-9669-b1535b1e5b77.png
[image: 20190513_August_2secnormsignals_Traditional_RFFleet] https://user-images.githubusercontent.com/44621661/57693359-e1fada80-75fd-11e9-9620-3dc2a1768e44.png
Observations The request from the traditional service is to reduce power to the grid over this time period, starting out as -1875 MW and varying over time between -1875 and -180 MW. The base power over this period seemed to start at -1313 MW and gradually was reduced over the first 35 minutes or so, then is relatively stable with a gradual rise toward the end of the drive cycle period. It was not entirely clear why the base power looks like it does. However the P_togrid seems to immediately show a significant reduction in power with the initial P_request followed by a gradual reduction in load of the fleet over the first ~13 minutes. At approximately minute 45, the P_togrid and P_base become essentially the same for the remainder of the period. P_response = P_togrid – P_base as it should for the entire period. The request does not appear to mirror the response, but this may be due to the magnitude of the request reducing power draw from the fleet and then all the refrigeration equipment coming largely back on ~16:45. There does not seem to be much in the way of temperature recovery in the last part of the period as P_togrid looks like P_base. Over the first 45 minutes, P_togrid is below but approaching P_base. Over the last 2h 15 minutes, the P_togrid was 0.54% lower than the P_base.
20190513_August_2sec_results_Traditional_RFFleet.xlsx https://github.com/GMLC-1-4-2/battery_interface/files/3177333/20190513_August_2sec_results_Traditional_RFFleet.xlsx
Dynamic_Regulation / Refrigeration Drive cycle file: 08 2017 Dynamic.csv Time: 08/01/2017 16:00 to 18:59 Sim Step: 2s Service Wt. 0.75 Assigned Service MW: 1875 MW
[image: image] https://user-images.githubusercontent.com/44621661/57694140-cdb7dd00-75ff-11e9-9fbf-5e5220a19994.png
[image: 20190513_August_2secnormsignals_Dynamic_RFFleet] https://user-images.githubusercontent.com/44621661/57694158-d7d9db80-75ff-11e9-8012-f06b1f7b49a1.png
Observation. The request from the dynamic regulation service is to reduce power to the grid over this time period, starting out as -1859 MW and varying over time between -1875 and +1875 MW. The base power over this period seemed to start at -2679 MW (Ref. Fleet Power draw) and was not able to respond by increasing the power draw initially in response to the first ~10 minutes of service request. The service request then goes positive and the P_response and P_grid react to the request twice before about hour 1620 by twice showing reduced power draw by the refrigeration fleet. The P_request then goes negative and the refrigeration fleet reacts by bringing P_grid very close to it baseline power draw. For the remainder of the test period, the response tends to look like the request in being positive or negative around the baseline, but the magnitude of the response is much smaller relative to the request than was seen in the first 20 minutes. P_response = P_togrid – P_base as it should for the entire period. Over the last 2h 15 minutes, the P_togrid was 0.07% lower than the P_base. The positive or negative behavior of the response tracks that of the request signal.
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-- Jingjing Liu, P.E., CDCP, BEAP, CP EnMS – Industrial, SEP Performance Verifier – Industrial
Program Manager Building & Industrial Applications, Energy Technologies Area Lawrence Berkeley National Laboratory Phone: (510) 486-5410 Email: JingjingLiu@lbl.gov psheaffer@lbl.gov Web: https://industrialapplications.lbl.gov/
@ORNLJD @jingjingliu2018
Traditional_Regulation / Refrigeration Drive cycle file: 08 2017 Traditional.csv Time: 08/01/2017 16:00 to 18:59 Sim Step: 2s Service Wt. 0.75 Assigned Service MW: 1875 MW
Observations The request from the traditional service is to reduce power to the grid over this time period, starting out as -1875 MW and varying over time between -1875 and -180 MW. The base power over this period seemed to start at -1313 MW and gradually was reduced over the first 35 minutes or so, then is relatively stable with a gradual rise toward the end of the drive cycle period. It was not entirely clear why the base power looks like it does. However the P_togrid seems to immediately show a significant reduction in power with the initial P_request followed by a gradual reduction in load of the fleet over the first ~13 minutes. At approximately minute 45, the P_togrid and P_base become essentially the same for the remainder of the period. P_response = P_togrid – P_base as it should for the entire period. The request does not appear to mirror the response, but this may be due to the magnitude of the request reducing power draw from the fleet and then all the refrigeration equipment coming largely back on ~16:45. There does not seem to be much in the way of temperature recovery in the last part of the period as P_togrid looks like P_base. Over the first 45 minutes, P_togrid is below but approaching P_base. Over the last 2h 15 minutes, the P_togrid was 0.54% lower than the P_base.
20190513_August_2sec_results_Traditional_RFFleet.xlsx
Dynamic_Regulation / Refrigeration Drive cycle file: 08 2017 Dynamic.csv Time: 08/01/2017 16:00 to 18:59 Sim Step: 2s Service Wt. 0.75 Assigned Service MW: 1875 MW
Observation. The request from the dynamic regulation service is to reduce power to the grid over this time period, starting out as -1859 MW and varying over time between -1875 and +1875 MW. The base power over this period seemed to start at -2679 MW (Ref. Fleet Power draw) and was not able to respond by increasing the power draw initially in response to the first ~10 minutes of service request. The service request then goes positive and the P_response and P_grid react to the request twice before about hour 1620 by twice showing reduced power draw by the refrigeration fleet. The P_request then goes negative and the refrigeration fleet reacts by bringing P_grid very close to it baseline power draw. For the remainder of the test period, the response tends to look like the request in being positive or negative around the baseline, but the magnitude of the response is much smaller relative to the request than was seen in the first 20 minutes.
P_response = P_togrid – P_base as it should for the entire period.
Over the last 2h 15 minutes, the P_togrid was 0.07% lower than the P_base. The positive or negative behavior of the response tracks that of the request signal.