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