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MVWG Report to TSSMVWG Report to TSSJanuary 2012January 2012
Stephanie LuPuget Sound Energy
Presentation OverviewPresentation Overview
1. Load Modeling
2. System Model Validation
3. Synchronous Generation Modeling
4. Renewable Generation Modeling
5. SVC Modeling
6. HVDC Modeling
7. Next Meeting
Load ModelingLoad Modeling
Load Modeling OverviewLoad Modeling Overview
Status of Phase 1 Implementation Plan Review of Composite Load Model
Structure Review and Updates to Composite Load
Model Data Validation and System Impact Studies Next Steps
Status of Composite Load Model Status of Composite Load Model Implementation Plan Phase 1Implementation Plan Phase 1
Description Date Status
Validation studies for oscillation events Completed Completed
System performance studies using existing cases (PSLF) On-going On-going
TSS approved Implementation Plan August 25-26, 2011 Approved
TSS Study Process – Q/A Proposed/Accepted by TSS (Include 2012 HS-OP, 2012 LS cases for review), key study areas, paths evaluated)
Early Sept 2011 Completed
Training via web conference on the Long ID (LID) for the load records, to train members on how to populate the LID
September 19, 2011October 6, 2011
Completed
PCC approved implementation plan October 12-14, 2011 Approved
MVWG Meeting - Status update November 7-10, 2011 Completed
SRWG Meeting and Workshop Workshop to include 2 hours for the composite load model –
explanation on the LIDs and tools for customizing the composite load model parameters.
November 16, 2011 Completed
Status of Composite Load Model Status of Composite Load Model Implementation Plan Phase 1 (cont.)Implementation Plan Phase 1 (cont.)
Description Date Status
Data request for the 2012 HS-OP and 2012 LS-OP from the 2011 Study Program to include LIDs populated for each load record
Based on the Study Program Schedule
2012 HS Completed; 2012 LS in progress
Data due to Area Coordinator for 2012 HS-OP and 2012 LS-OP from the 2011 Study Program
Per Study Program Schedule - Oct 14 & Oct 28, 2011
2012 HS Completed; 2012 LS in progress
2012 HS-OP and 2012 LS-OP base cases available Per Study Program Schedule - Nov 2 & 16, 2011
2012 HS case posted Jan 11, 2012; dyd file expected this week
2012 LS case in progress.
PSSE dynamics file with composite load model available (through the PSLF to PSSE conversion program)
By January 2012 In progress.
Description Date Updated Date
TSS Meeting – Status update January 25-27, 2012 January 25-27, 2012
MVWG Meeting – Status update March 2012 March 19-22, 2012
TSS Meeting – Status Update April 25-27, 2012 April 25-27, 2012
RS Meeting – Status Update May 2012 May 10-11, 2012
Utility members evaluation for path ratings Through March 16, 2012 By May 2012
Utility members evaluation for TPL Studies Through March 16, 2012 By May 2012
MVWG Meeting – Status update June 18-21, 2012
Draft “Summary Paper” Distributed to TSS and RS Early April 2012 July 2012
RS Meeting – Member Reports/Status Update May 2012 August 16-17, 2012
TSS Meeting – Member Reports/Status Update April 25-27, 2012 August 29-31, 2012
PCC MeetingTSS recommends to PCC that WECC write a letter
announcing the move to the composite load model
July 2012 October 10-12, 2012
SRWG DPM Update July 2012 November 7-9, 2012
Status of Composite Load Model Status of Composite Load Model Implementation Plan Phase 1 (cont.)Implementation Plan Phase 1 (cont.)
Flow chart to create Flow chart to create CMPLDW dynamic recordsCMPLDW dynamic records
Utilities,SRWG
MVWG,TSS
WECCStaff
Populate load LID in WECC
base case
Maintain 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 model
database
Create CMPLDW dynamic model
records
Step 1 Step 2 Step 3
LMDT 3A is posted on WECC web-site, including user’s manual
Composite Load Model Composite Load Model StructureStructure
WECC Composite Load ModelWECC Composite Load Model
Electronic
M
M
M
69-kV115-kV138-kV
Static
AC
12.5-kV13.8-kV
UVLS
UFLS
Distribution Equivalento Substation LTC xfmr & shunts o Feeder equivalent
Full and partial load sheddingo Under-frequencyo Under-voltage
End-useso Motors (3Ø, or 1Ø A/C)o Electronic loado Static load
Composite Load Model Composite Load Model DataData
WECC Composite Load ModelWECC Composite Load Model
Electronic
M
Load ModelCompositionData
M
M
115-kV230-kV
Static
Load ComponentModel DataDistribution Equivalent Data
UVLS and UFLS Data
AC
cmpldw 43085 "CANYON " 115.00 "1 " : #1 mva=63.18 "Bss" 0 "Rfdr" 0.032 "Xfdr" 0.04 "Fb" 0.749/ "Xxf" 0.08 "TfixHS" 1 "TfixLS" 1 "LTC" 1 "Tmin" 0.9 "Tmax" 1.1 "step" 0.00625 / "Vmin" 1.025 "Vmax" 1.04 "Tdel" 30 "Ttap" 5 "Rcomp" 0 "Xcomp" 0 /
"Fma" 0.234 "Fmb" 0.157 "Fmc" 0.032 "Fmd" 0.103 "Fel" 0.136 / "PFel" 1 "Vd1" 0.75 "Vd2" 0.65 "Frcel" 0.35 / "Pfs" -0.99274 "P1e" 2 "P1c" 0.307692 "P2e" 1 "P2c" 0.692308 "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" 0.104 / "TpoA" 0.095 "TppoA" 0.0021 "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" 0.0026 "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" 99999 / "LfmC" 0.75 "RsC" 0.03 "LsC" 1.8 "LpC" 0.19 "LppC" 0.14 / "TpoC" 0.2 "TppoC" 0.0026 "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" 99999 / "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
Distribution Equivalent Data
Load ComponentModel Data
Load ModelComposition Data
WECC Composite Load ModelWECC Composite Load Model
Distribution Equivalent DataDistribution Equivalent Data
Electronic
M
M
M
69-kV115-kV138-kV
Static
M
X = 8%X = 8%LF = 110%LF = 110%Tap = +/- 10%Tap = +/- 10%
V = 4 to 6%V = 4 to 6%X/R = 1.5X/R = 1.5PL < 7%PL < 7%B1:B2 = 3:1B1:B2 = 3:1
V = 1.02 … 1.04
V > 0.95
B1B1 B2B2
R + j XR + j X
BssBss
LoaLoad Mod Model Composition – del Composition – Long ID (LID)Long ID (LID) LID code is one of the following:
<3-character climate zone>_<3-character load class> <7-character industrial, agricultural or auxiliary load ID>
Examples: Commercial load downtown Phoenix with high
concentration of commercial loads would be identified as "DSW_COM"
Rural agricultural load in Moses Lake, WA would be identified as "NWI_RAG“
A steel mill would be “IND_SML” A power plant auxiliary would be “PPA_AUX”
WECC Climate AreasID Climate Zone Representative City
NWC Northwest Coast Seattle, Vancouver BC
NWV Northwest Valley Portland OR, west of Cascades
NWI Northwest Inland Boise, Tri-Cities, Spokane
RMN Rocky Mountain North Calgary, Montana, Wyoming
NCC Northern California Coast Bay Area
NCV Northern California Valley Sacramento
NCI Northern California Inland Fresno
SCC Southern California Coast LA, San Diego
SCV Southern California Valley LA, San Diego
SCI Southern California Inland LA, San Diego
DSW Desert Southwest Phoenix, Riverside, Las Vegas
HID High Desert Salt Lake City, Albuquerque, Denver, Reno
Substation/Feeder Type
IDSubstation Type Residential Commercial Industrial Agricultural
RES Residential 75 to 80% 15 to 30% 0% 0%
COM Commercial 10 to 20% 80 to 90% 0% 0%
MIX Mixed 40 to 60% 40 to 60% 0 to 20% 0%
RAGRural Agricultural 40% 30% 10% 20%
Industrial, Agricultural, and Power Plant Auxiliary Loads
ID Feeder Type
IND_PCH Petro-Chemical Plant
IND_PMK Paper Mill – Kraft Mill
IND_PMT Paper Mill – Thermo-mechanical process
IND_ASM Aluminum Smelter
IND_SML Steel Mill
IND_MIN Mining operation
IND_SCD Semiconductor Plant
IND_SRF Server Farm
IND_OTH Industrial – Other
AGR_IRR Agricultural irrigation loads
AGR_PMP Large pumping stations with synchronous motors
PPA_AUX Power Plant Auxiliary
Load Composition Model Tools
Load Composition Model - PNNL LCM Load Composition Model “Light” - WECC LCM
Spreadsheet updated, version 1x.
PNNL is developing the “next generation” LCM tool To combine the ease of interface of the WECC light
model with the computational capabilities of the full PNNL model, including the capabilities of validating the load shapes
Validation and System Validation and System Impact StudiesImpact Studies
System Impact Studies PSE and CalISO presented results with Phase 1 and
Phase 2 CMPLDW models
Conclusions Phase 1 performed similar to the existing interim model When large portions of load are tripped the system may
experience high voltages and frequencies Phase 2 model is sensitive to the percentage of motors that
trip/lockout and trip/restart, more research is needed to determine the appropriate percentage of motors that lockout versus restart
Some generators may go out of step because of under-excitation
An outage on lower voltage close to load may be more critical than a 500 kV outage
More model validation is needed based on actual system events
Next StepsNext Steps
Next Steps
Phase 1: See implementation plan
Phase 2: Perform additional sensitivity studies Determine protection settings Continue work on understanding the phenomenon of air-
conditioner stalling in distribution systems (supported by DOE and LBNL)
Continue collecting disturbance recordings for validation, e.g., SCE’s PQube recordings
Provide recommendations for changing the voltage dip criteria
Continuous: Model validation
Voltage Dip Criteria
Main factors and considerations under discussionConsistency with new TPL-001-2 standardAddress performance during FIDVR eventsCoordinate with recent power swing criterion
System Model ValidationSystem Model Validation
System Model Validation StudiesSystem Model Validation Studies
System model validation is a priority of MVWG System model validation is a deliverable under the
Western Interconnection Synchro-phasor Program Start conducting system model validation studies in 2012
System model validation is part of the NERC Model Validation Task Force efforts
Major impediment: Validation base case development
Solution: Automate the process of base case development Leverage West-wide System Model (WSM)
System Model Validation StudiesSystem Model Validation Studies
WECC Powerflow Case:Bus-branchBus number, ID
WSM Powerflow Case:Node-breaker-elementElement Code
WECC Dynamic Database:Bus number, ID
WSM Dynamic Database:Element code, node11
22
System Model Validation StudiesSystem Model Validation Studies
Option 1 (WECC is working on the contract): Convert WECC dynamic data base to “element
code” definition consistent with WSM (one time effort)
Validation studies are done using WSM powerflow case and the new dynamic data file
Option 2 (developed by MVWG resources): Map generation, loads and equipment status from
WSM to WECC powerflow case Validation studies are done using WECC powerflow
case and existing dynamic database
System Model Validation Analytic Tools Develop and deploy analytic tools for system model
validation To match features of the response and understand of its
sensitivities to model parameters
Apply analytic tools for power plant model calibration composite load model calibration sub-system model calibration small signal model validation model validation using large disturbance data
See Statement of Work for more information WECC MVWG 2011 - SOW System Model Validation - 2011-08-16DGD.doc
Synchronous GenerationSynchronous Generation
Synchronous Generator, Excitation Synchronous Generator, Excitation and Turbine Control Modelsand Turbine Control Models Power Plant Model Data Task Force
Held kick-off meeting November 8, 2011 Charter approved by MVWG
Excitation model conversion to IEEE models RFP (Completed)
OEL, UEL and generator protection models (In progress - 2013)
Review of generator testing documents (in progress) Power Plant Model Validation Tool Updated
Power Plant Model Data Task Force – Charter Summary Ensure the quality of the power plant modeling data in
grid simulation databases and to improve coordination between GOs and TPs Continuous review of existing power plant modeling data in the
powerflow and dynamics databases Improving data checking and processing of new power plant
modeling data Development of processes and tools to improve coordination
between GOs and TPs for submitting data Review the existing WECC power plant model validation
guidelines and recommend improvements The Task Force shall work with SRWG and MVWG to
carry out these objectives
Exciter ConversionExciter Conversion MVWG issued RFP to convert legacy
excitation models to IEEE-approved excitation models – Completed November 2011
Independent model translation program created with the ability to convert any model to any other model, logic developed for exciter model conversions
Excitation Models
Next goal is to reduce the number of approved excitation models
Short-list needs to include the capability of modeling OELs, UELs, and any other features that are determined to be important The existing OEL1 model is not compatible with the
IEEE models Shawn Patterson will lead an effort to clearly
define the issues and determine a plan moving forward
Generator Testing Documents
Documents currently under review WECC Generating Unit Model Validation Policy
(Additional to the recent updates proposed by TSS) WECC Generating Facility Data Requirements WECC Generating Unit Baseline Test Requirements
(with the proposed addition to add for V-curve data as discussed during the November MVWG meeting)
WECC Generating Facility Model Validation Requirements
Power Plant Model ValidationPower Plant Model Validation Power Plant Model Validation application
using PSLF play-in function has been updated to PPMV Version 1B
Power Plant Model Validation is one of the deliverables under WISP
An application is being developed for checking the “reasonableness” of the power plant response:
Compare the actual response to “best practices”
Wind Generation ModelingWind Generation Modeling
Status of Wind Modeling Effort Version 1 of wind generic models implemented
as library models in PSSE, PSLF and other platforms
Generic model WT1 WT2 WT3 WT4Generator WT1G WT2G WT3G WT4GEl. Controller WT2E WT3E WT4ETurbine/shaft WT12T WT12T WT3T WT4TPitch control WT3PPseudo Gov/: aerodynamics WT12A WT12A
PSLF/17PSLF/17
PSSE/32PSSE/32
Model Type Type 1 Type 2 Type 3 Type 4Generator wt1g wt2g wt3g wt4gExcitation / Controller wt2e wt3e wt4eTurbine wt1t wt2t wt3t wt4tPitch Controller/Pseudo Gov. wt1p wt2p wt3p
Phase 2 of wind model development – Model structure improvements Type 1 and 2 improvements include:
Redesign aero/pitch model to better represent pitch strategy during low voltage conditions
Type 4 improvements include: Add option to bypass local volt/var controls Add turbine shaft model and pitch control similar to type 3 Add frequency droop for high frequency conditions Add voltage dip logic and integrator freezing Add voltage divider and integrator bypass
Type 3 improvements to develop a non-GE specific model include: Add option to bypass local volt/var controls Review representation of the response during low voltage performance;
emerging consensus is to add a voltage dip look up table Possibly add defensive pitch strategy similar to Type 1 and 2 Add frequency droop for high frequency conditions
Type 1, 2, and 4 planned to be up for approval at the March meeting. More work is needed for Type 3.
PV Generation ModelingPV Generation Modeling
Large PV Power Plant Modeling Current versions of PSLF and PSSE have models that
can be used for representation of large PV generation PSLF Version 18 includes a WECC generic version of a
PV system model, PV1, which consists of two modules - PV1E and PV1G. It is a full featured model based on the WECC Type 4 wind generation model.
Refinements to the models are in progress Add active power control for frequency response Change limit nomenclature from Pmax to Pavail and Pmin to 0 Add voltage dip logic and integrator freezing Add voltage divider and integrator bypass
Consistent with the WECC PV Modeling Guide, the feeder or collector system equivalent should be included in the power flow model for large PV plants
Distributed PV Modeling Distributed PV modeling can be separated into:
large commercial (usually warehouse rooftop) installation residential rooftop panels
PVD1 is a more basic model than PV1 and is intended to represent large distribution-connected PV that are represented in power flow as stand-alone generators
Recommended refinements to PVD1 include: Add function to allow remote bus control Add function to allow for reconnect of a portion of the generation
“tripped” Add simple current limiter
A similar version of PVD1 will eventually be made part of the WECC composite load dynamic model to residential or smaller-scale distributed PV that is load-netted in power flow. Specifications are not yet complete, as further discussion is needed.
SVC ModelingSVC Modeling
SVC ModelsSVC Models
Webinar was held Dec 12, 2011 for SRWG members
Is there interest for MVWG to provide a full day workshop?
HVDC ModelingHVDC Modeling
HVDC Modeling
The task force has started with the point-to-point Conventional and Voltage Source Converter (VSC) HVDC models
Conventional point-to-point HVDC The powerflow model exists and has been well tested Potential improvement is to add capability for user-defined tap
control Effort may be needed to improve documentation
VSC point-to-point HVDC Add capability in powerflow to allow DC bus to connect to a PV
node via a VSC so that it can improve the coordination between powerflow and dynamic models for a seamless initialization
A skeleton document has been started and will aim to get vendor feedback at the next task force meeting
PDCI HVDC Modeling
PDCI model for south to north was derated due to a bad model – the converter controls at Sylmar
LADWP needs to provide an as-built model and run validation of the model and current control
Will be discussed at the next HVDC task force meeting
Next MeetingNext Meeting
Next Meeting
Maxwell RoomMaxwell Room
Edison/Fermi RoomsEdison/Fermi Rooms
Tesla RoomTesla Room
Monday Tuesday Wednesday Thursday Friday
March 19June 18Nov 5
March 20June 19Nov 6
March 21June 20Nov 7
March 22June 21Nov 8
March 23June 22Nov 9
MVWG - PPMDTFMVWG - PPMDTF
MVWG - Utility MtgMVWG -
Utility Mtg
MVWG - REMTFMVWG - REMTFMVWG - LMTF
MVWG - LMTF
MVWGMVWG MVWGMVWG
SRWG Breakout 2
SRWG Breakout 2
SRWGSRWG SRWGSRWG
SRWG Breakout 1
SRWG Breakout 1
SRWG Breakout 3
SRWG Breakout 3
SRWG Breakout 2
SRWG Breakout 2
SRWG Breakout 1
SRWG Breakout 1
SRWG Breakout 3
SRWG Breakout 3
Upcoming Workshops/Training?
SVC Modeling? Joint Training Session with SRWG and
Program Users Work Groups