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CMPLDW November 2011. Phase 1 WECC Composite Load Model (CMPLDW) Electronic M M M 69-kV 115-kV 138-kV Static AC 12.5-kV 13.8-kV UVLS UFLS.

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Presentation on theme: "CMPLDW November 2011. Phase 1 WECC Composite Load Model (CMPLDW) Electronic M M M 69-kV 115-kV 138-kV Static AC 12.5-kV 13.8-kV UVLS UFLS."— Presentation transcript:

1 CMPLDW November 2011

2 Phase 1

3 WECC Composite Load Model (CMPLDW) Electronic M M M 69-kV 115-kV 138-kV Static AC 12.5-kV 13.8-kV UVLS UFLS

4 Composite Load Model Structure Composite load model structure is implemented in General Electrics PSLF, Siemens PTI PSS®E, Power World Simulator – Similar model exists in PowerTechs TSAT TSS approved Composite Load Model Structure

5 Composite Load Model Data Electronic M Load Model Composition Data M M 115-kV 230-kV Static Load Component Model Data Distribution Equivalent Data UVLS and UFLS Data M

6 Process

7 7 Utilities, SRWG MVWG WECC Staff Populate load LID in WECC base case Maintain load composition seasonal defaults for 12 climate zones and 4 feeder types + industrial loads Create records with default load composition Provide bus- specific load composition, if desired, to over- ride defaults Update load composition records Maintain dynamic motor model data Create CMPLDW dynamic model records Step 1Step 2 Step 3

8 Load Composition Data

9 9 Long ID field in PSLF program is used to identify the load climate zone and substation type The LID consists of 7 characters. For commercial, residential, and rural loads, the LID code is a combination of the Climate Zone and Feeder Type: _ o A load in downtown Phoenix with high concentration of commercial loads would be identified as "DSW_COM" o Rural agricultural load in Moses Lake, WA would be identified as "NWI_RAG" For industrial loads, the LID code will be one of the Industrial Load IDs, which starts with IND_. For power plant auxiliary loads, the LID code will be PPA_AUX. CMPLDW Long ID

10 10 WECC Climate Areas IDClimate ZoneRepresentative City NWCNorthwest CoastSeattle, Vancouver BC NWVNorthwest ValleyPortland OR NWINorthwest InlandBoise, Tri-Cities, Spokane RMNRocky Mountain NorthCalgary, Montana, Wyoming NCCNorthern California CoastBay Area NCVNorthern California ValleySacramento NCINorthern California InlandFresno SCCSouthern California CoastLA, San Diego SCVSouthern California ValleyLA, San Diego SCISouthern California InlandLA, San Diego DSWDesert SouthwestPhoenix, Riverside, Las Vegas HIDHigh Desert Salt Lake City, Albuquerque, Denver, Reno

11 11 LID Regions NWI NWV NWC` RMN HID DSW NCC NCV SCC SCV NWC – Northwest coast NWV – Northwest valley NWI – Northwest inland RMN – Rocky mountain NCC – N. Calif. coast NCV – N. Calif. valley HID – High desert SCC – S. Calif. coast SCV – S. Calif. valley DSW – Desert southwest

12 12 Substation / Feeder Types IDFeeder TypeResidentialCommercialIndustrialAgricultural RESResidential70 to 85%15 to 30%0% COMCommercial10 to 20%80 to 90%0% MIXMixed40 to 60% 0 to 20%0% RAG Rural Agricultural 40%30%10%20% Percentage is energy, not customer count

13 13 David Chassin at PNNL led the development of load composition data Detailed models of various building types Residential loads are modeled using ELCAP data and DOE-2 models Commercial loads are taken from CEUS WECC developed mapping from end-uses to models Load Composition Model

14 14

15 15

16 16 Load Class Model Components

17 17 WECC Load Composition Model (Light)

18 18 Currently load composition is estimated for five conditions 1.Normal 1 in 2 summer 2.Peak summer 3.Cool summer 4.Shoulder (spring/fall) 5.Normal winter A default data file is produced for the Load Model Data Tool (LMDT) Load Composition Model (LCM)

19 19 Several utilities (PSE, SRP, PG&E, BPA) provided historic load shapes, temperatures, and substation information to PNNL for model validation David Chassin has calibrated LCM, this work will continue, improvement is very desirable LCM Load Shape Validation (New)

20 20 Better understanding of electrification by regions, and ultimately by substations Validation of building models Right now commercial data is extrapolated from California CEUS, and residential data is used from ELCAP Validation of load shapes at substation level: Use customer mix data and models to produce load shapes Validate the load shapes using SCADA data (5- min and 1–hour are available from utilities) Future work

21 21 PNNL will develop the next generation LCM that will combine the ease of interface of light model with the computational capabilities of the full model, including the capabilities of validating the load shapes Need to discuss on how to integrate with BCCS Future work

22 22 Motor Data

23 23 Commercial Compressor Motor

24 24 Commercial Fan and Pump Motors


26 26 Industrial compressors: Trip and lock-out - half at 75%, half at 65%, 3 to 5 cycles Industrial fans and pumps Trip and lock-out - half at 75%, half at 65%, 3 to 5 cycles Commercial compressors o Trip and lock-out: 20% of motors, trip < 60% 2 cycles o Trip and reclose: remaining, trip 60% for 0.2 sec Fans and pumps o Trip and lock-out: 20% of motors, trip < 60% 2 cycles o Trip and reclose: remaining, trip 60% for 0.2 sec Protection

27 27 Protection

28 Industrial Loads

29 Industrial Load LIDs IDFeeder Type IND_PCHPetro-Chemical Plant IND_PMKPaper Mill – Kraft process IND_PMTPaper Mill – Thermo-mechanical process IND_ASMAluminum Smelter IND_SMLSteel Mill IND_MINMining operation IND_SCDSemiconductor Plant IND_SRFServer Farm IND_OTHIndustrial – Other

30 Industrial Load Models

31 Tools for Load Model Data Management

32 WECC Composite Load Model cmpldw "CANYON " "1 " : #1 mva=63.18 "Bss" 0 "Rfdr" "Xfdr" 0.04 "Fb" 0.749/ "Xxf" 0.08 "TfixHS" 1 "TfixLS" 1 "LTC" 1 "Tmin" 0.9 "Tmax" 1.1 "step" / "Vmin" "Vmax" 1.04 "Tdel" 30 "Ttap" 5 "Rcomp" 0 "Xcomp" 0 / "Fma" "Fmb" "Fmc" "Fmd" "Fel" / "PFel" 1 "Vd1" 0.75 "Vd2" 0.65 "Frcel" 0.35 / "Pfs" "P1e" 2 "P1c" "P2e" 1 "P2c" "Pfreq" 0 / "Q1e" 2 "Q1c" -0.5 "Q2e" 1 "Q2c" 1.5 "Qfreq" -1 / "MtpA" 3 "MtpB" 3 "MtpC" 3 "MtpD" 1 / "LfmA" 0.75 "RsA" 0.04 "LsA" 1.8 "LpA" 0.12 "LppA" / "TpoA" "TppoA" "HA" 0.05 "etrqA" 0 / "Vtr1A" 0.7 "Ttr1A" 0.05 "Ftr1A" 0.2 "Vrc1A" 1 "Trc1A" 9999 / "Vtr2A" 0.55 "Ttr2A" 0.03 "Ftr2A" 0.75 "Vrc2A" 0.65 "Trc2A" 0.1 / "LfmB" 0.75 "RsB" 0.03 "LsB" 1.8 "LpB" 0.19 "LppB" 0.14 / "TpoB" 0.2 "TppoB" "HB" 0.5 "etrqB" 2 / "Vtr1B" 0.65 "Ttr1B" 0.05 "Ftr1B" 0.1 "Vrc1B" 1 "Trc1B" 9999 / "Vtr2B" 0.6 "Ttr2B" 0.03 "Ftr2B" 0.1 "Vrc2B" 1 "Trc2B" / "LfmC" 0.75 "RsC" 0.03 "LsC" 1.8 "LpC" 0.19 "LppC" 0.14 / "TpoC" 0.2 "TppoC" "HC" 0.15 "etrqc" 2 / "Vtr1C" 0.65 "Ttr1C" 0.05 "Ftr1C" 0.1 "Vrc1C" 1 "Trc1C" 9999 / "Vtr2C" 0.6 "Ttr2C" 0.03 "Ftr2C" 0.1 "Vrc2C" 1 "Trc2C" / "LfmD" 1 "CompPF" 0.98 / "Vstall" 0.54 "Rstall" 0.1 "Xstall" 0.1 "Tstall" 0.03 "Frst" 0.14 "Vrst" 0.95 "Trst" 0.3 / "fuvr" 0.1 "vtr1" 0.6 "ttr1" 0.02 "vtr2" 0.9 "ttr2" 5 / "Vc1off" 0.5 "Vc2off" 0.6 "Vc1on" 0.4 "Vc2on" 0.5 / "Tth" 15 "Th1t" 0.7 "Th2t" 1.9 "tv" 0.025

33 33 Powerflow case (done by SRWG) Climate zone and load type are identified in Long_ID column of load table in PSLF E.g. DSW_RES = Desert Southwest, predominantly residential loads EPCL Programs (done by WECC Staff) Default data sets for each climate zone and feeder type Ability to over-ride defaults with specific information Creates composite load model records for PSLF PTI PSS®E Users Convert from PSLF models IPLAN tolls may be available ? Load models will be distributed by WECC staff with study cases LMDT 3A is posted on WECC web-site, including users manual LMDT 3A

34 Current State

35 Conclusions WECC Composite load model is implemented in GE PSLF, Siemens PTI PSS®E, Power World, Power Tech TSAT Tools are developed for load model data management Default sets are developed: – 12 climate zones in WECC, – four types of feeders – Summer, winter and shoulder conditions

36 Conclusions TSS and PCC approved the implementation plant SRWG is populating LIDs for 2012 Heavy Summer case Instructions are developed Two webinars are conducted WECC members will conduct the system impact studies using 2012 Heavy Summer and 2012 Light Summer operating cases

37 Phase 2 – Not Only Load Model

38 FIDVR Composite load model is capable of reproducing the FIDVR phenomenon Composite load model can be tuned with reasonable data sets to match the historic events MVWG at this point is not comfortable recommending using CMPLDW for FIDVR studies for compliance purposes There is a concern that the FIDVR modeling can result in over- investment or unnecessary operational restrictions

39 FIDVR Modeling – Air-Conditioners SCE, BPA, EPRI tested a number of units, understand how an ac unit behaves when subjected to disturbances EMTP-level models are developed AHRI input through the DOE project was very valuable The stall phenomenon is point-on-wave dependent Need better understanding of what voltages are seen by air- conditioners in a distribution network during a fault Therefore, PSCAD studies are planned under the DOE project Disturbance collection by SCE and CNP are very valuable

40 FIDVR Modeling – Load Protection John Kueck prepared a report for WECC on motor protection Very informative, but show the complexity of the issue Planned activities include: Surveys and meetings with electrical contractors to better understand the protection practices Develop the best practices by balancing the grid requirements with the equipment protection needs Industry outreach on best practices Testing contactors at BPA lab Incorporate load protection information in the Load Composition Model

41 FIDVR Modeling – Load Composition PNNL will work with WECC on the development of the next version of the Load Composition Model that retains key features of the complex model and has simplicity of the light model. WECC LMTF will contact building operators – retailers, groceries, office, malls, restaurants and data centers – to get better information on (a) load shapes and load composition, (b) typical electrical end-uses and their size, and (c) protection and process controls used in the electrical equipment PNNL will work with WECC utilities on validating the load shapes using historic data for various regions within the West

42 FIDVR Modeling – Unbalanced Faults Issue – NERC TPL Standards require studying of delayed clearing faults as 1-phase faults – Existing positive sequence programs do not represent the AC stall in a single phase or the AC stall spreading PSCAD studies are expected to provide an insight in AC behavior during unbalanced faults, modeling recommendations will follow

43 FIDVR Modeling – Power Plant Ride Through Current State PSLF program has lhvrt and lhfrt models to represent generator ride-through protection. PSLF has gp1 model of a typical protection package of a synchronous generator Next Steps Utilities can work with power plant operators to evaluate their plant ride-through capabilities to populate lhvrt records. WECC MVWG will perform review of gp1 model in GE PSLF Utilities can conduct meeting with power plant operators to determine a set of typical protection data Power plants, HVDC, and SVS can trip or experience an unexpected power reduction because of many reasons – e.g. station service problems during a fault, FIDVR or power swing. It is not practical to have mathematical models for these conditions, and the best approach is to perform sensitivity analysis for Category D type events

44 FIDVR Modeling – Reactive Limits Next Steps Review the excitation system models and to reduce the set of active models Develop and implement new Over-Excitation Limiter (OEL) models in GE PSLF Develop and implement Under-Excitation Limiter (UEL) models in GE PSLF Review whether reactive power limits are adequately represented in the generic wind turbine models

45 FIDVR Modeling – Shunt Capacitors Current State GE PSLF program has msc1 model for switching mechanically switched capacitors. The model has two definite-time on and off settings. Next Steps Develop epcls to convert svd data to shunt records in PSLF WECC utilities need to provide data for msc1 model. GE PSLF program needs to expand the model to mechanically-switched shunt reactors

46 FIDVR Modeling – Line Relaying Current State GE PSLF program currently has several models for various types of line protection, including a default model zlinw Next Steps ???

47 Conclusion Phase 2 may take several years to complete Planners are encouraged to do sensitivity studies with air-conditioner stalling enabled to test the robustness of proposed grid reinforcements

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