MVWG Report to TSSMay 2014

Stephanie Lu, MVWG ChairSeattle City Light

Recent Meetings PPMDTF Conference Call March 7, 2014 HVDCTF Conference Call March 13, 2014 REMTF Meeting March 18-19, 2014 LMTF Meeting March 19, 2014 MVWG Meeting March 19-20, 2014

MVWG Vice Chair Jun Wen, SCE has been appointed as Vice Chair

MVWG member since 2008

Jun Wen is a Senior Power System Engineer at Southern California Edison (SCE) Transmission Strategy and Special Assessment (TSSA). She received her BSEE and MSEE from Tsinghua University in Electrical Engineering, and Ph.D. from University of California with the focus on modern Power Electronics. She has been leading the development of the Centralized RAS project – an IEC 61850 based Wide Area Monitoring and Protection system since 2008, she is also an active member at the WECC Modeling and Validation Working Group. Before joining SCE, she was advisor for One-Cycle Control, Inc. and consultant for Aegis Technology. She has published over thirty technical articles and holds one US and International Patent on multilevel converter topology and applications.

MVWG Activities Overview Approval Items Renewable Energy Modeling Approved Dynamics Model List Load Modeling System Model Validation Generator Modeling, Testing, and Validation HVDC Modeling Other items: NERC Updates, WECC Project

Updates, RAS/Relay Modeling, Program Updates Next Meetings and Workshops

MVWG Approval ItemsFor TSS Approval: Wind Power Plant Dynamic Modeling Guidelines PV Power Plant Dynamic Modeling Guidelines

For TSS Information: Updates to the Approved Dynamics Model List “Model Validation and System Performance Analysis for

PDCI RAS Event that Occurred on May 30, 2013” Report

Renewable Energy Modeling

Wind/Solar Implementation PlanDescription Date

MVWG Approved Model Specifications November 2012TSS Approved Model Specifications January 2013Complete WECC-scale model testing with model prototypes (Alpha version) September 2013

2-Hr Webinar: cover policy, model development, expected deployment process November 2013

Release version of commercial software programs (at least PSLF) made available to WECC as Beta version Nov/Dec 2013

Complete drafting of MVWG to provide Application Guidelines with ‘typical’ data from major manufacturers March 2014

Update Approved Dynamic Models List (add updated wind and solar models, and plan for removing obsolete models) March 2014

WECC completes process to release to WECC users March/April 2014

Issue request for entities to submit data using new models into WECC case, with grace period (coordinate with SRWG) Summer 2014

User Workshop June 17, 2014Model Validation Guideline (Newly added to list) Fall 2014?

2nd Generation Wind Models Type 1 Type 2 Software Platform PSLF™ PSS®E PW PSLF™ PSS®E PW Generator wt1g WT1G1 wt1g, WT1G1 wt2g WT2G1 wt2g, WT2G1 Excitation wt2e WT2E1 wt2e, WT2E1 Turbine wt1t WT12T1 wt1t, WT12T1 wt2t WT12T1 wt2t, WT12T1 Pitch Controller wt1p WT12A1 wt1p, WT12A1 wt2p WT12A1 wt2p, WT12A1 Type 3 Type 4 Software Platform PSLF™ PSS®E PW PSLF™ PSS®E PW Plant Controller repc_a REPCAU1 repc_a repc_a REPCAU1 repc_a Generator/Converter regc_a REGCAU1 regc_a regc_a REGCAU1 regc_a Electrical Control reec_a REECAU1 reec_a reec_a REECAU1 reec_a Turbine wtgt_a WTDTAU1 wtgt_a wtgt_a WTDTAU1 wtgt_a Aerodynamics wtga_a WTARAU1 wtgar_a Pitch Controller wtgp_a WTPTAU1 wtgpt_a Torque Controller wtgq_a WTTQAU1 wtgtrq_a PSLF™ PSS®E PowerWorld Voltage / Frequency Protection (optional)

lhrvt / lhfrt vtgtpa / frqtpa lhrvt / lhfrt

Photovoltaic Models

Distributed and Small PV Plants = PVD1

Module PSLF™ modules PSS®E modules PowerWorld Grid interface regc_a REGCAU1 regc_a Electrical controls reec_b REECBU1 reec_b Plant controller (optional) repc_a REPCAU1 repc_a Voltage/frequency protection (optional)

lhvrt / lhfrt VRGTPA / FRQTPA lhvrt / lhfrt

Wind and PV Dynamic Modeling Guidelines

Guidelines for Wind and PV dynamic modeling were developed and approved by MVWG

Motion: Approve the Wind Power Plant Dynamic Modeling Guidelines

Motion: Approve the PV Power Plant Dynamic Modeling Guidelines

REMTF – Next Steps Wind Type 3 torque controller model – reviewing a

proposal to keep the more complex model as a separate module

Distributed PV model in composite load model More discussion is needed between REMTF, program vendors

and LMTF to implement a distributed PV model in the composite load model CMPLDW

Energy Storage Modeling – NEW Plant Level Control Modeling – NEW

Approved Dynamics List

Approved Dynamics Model List MVWG updated the Approved Dynamic Models List with

the following Added the 2nd generation wind and 1st generation PV models

Added approval dates

In coordination with SRWG implementation plan for new wind models, will remove superseded wt3x and wt4x models

REPC_A – Plant controller for PV, WT3/4

REEC_A – Electrical controls for WT3/4 REEC_B – Electrical controls for PV REGC_A – Generator/Converter for

PV, WT3/4

WTGT_A – Drive Train for WT3/4 WTGA_A – Aerodynamics for WT3 WTGP_A – Pitch control for WT3 WTGQ_A – Torque control for WT3 PVD1 – new model for small PV

Status of Model DevelopmentModel Description Model Name Model Spec

Approved?User Guide Available?

WECC Approved?

Composite load model CMPLDW Need to post X X1st generation wind WTxx models X X XOver excitation model OEL1 PSLF Manual - XSVS models SVSMO1, 2, 3 X X XGenerator model GENTPJ X - XOvercurrent relay model LOCTI & TIOCRS X See Model Spec XVolt and freq ride through LHVRT, LHFRT - - XHydro turbine governor model H6B X - X2nd gen wind/1st gen PV RExx and WTGxx models X X XDistributed PV model PVD1 X X XDirectional Overcurrent relay TIOCRS (revision) X See Model Spec Distance relay model DISTRELAY X See Model Spec Under excitation relays UEL1 & UEL2 IEEE 421.5

(2005)-

Excitation system models See IEEE 421.5 efforts Composite load model with DG Under development Colstrip ATR Under development (NWE) Generator protection Under development (MSRATF)

Other See Approved Dynamics List X

Load Modeling

Load Modeling – Experience with CMPLDW Phase 1 CMPLDW is being provided with 2014 WECC base

cases CAISO, SCE, and WECC reported that high voltages

(1.2-1.3 pu) were seen during the simulations Overvoltages are most sensitive to protection trip set

points and load composition Need data from actual events to validate how much load

trips during actual events and compare against simulation

Load Modeling – Composite Load Model Data Tools Tools available on the TSS Base Cases website

in the Composite Load Model Tools folder Load Model Data Tool LMDT4A

“2012 WECC CMPLDW.zip” Updated Load Composition Data *NEW*

“CMPLDW Load Composition Data_032514.zip” PNNL Tool to create PSSE dyr format

“LMDT_install.zip”

Load Modeling – CMPLDW Phase 2 Work (Bill Price) Reduced computation time by not performing network matrix rebuilding and

factorization every time the taps are changed by LTC (v18.1_03) Added protective functions to MOTORC model (v18.1_03) Implemented request to force initial far-end voltage to be no less than 0.95

by changing taps instead of reducing feeder R&X (v18.1_03) Instead of these solutions, a new request by LMTF is to add a new parameter Vmin to block

the model if the voltage is less than Vmin

Benchmarking will be performed between improved MOTORC and LD1PAC models to determine if MOTORC model option should be added to CMPLDW

Results with transformer saturation modeled showed very minor voltage differences, there is no plan to add this complexity to the model

Distributed PV will be incorporated into CMPLDW Presented a method to simply data management - CMPLDW2

Load Modeling – Voltage Dip Criteria WECC-0100 project is to develop a guideline for items remaining

from RBP and other needs for TPL-001-4, including acceptable voltage response TPL-001-WECC-RBP-2.1 retirement on 12/31/2015

Whitepaper discussed: For small and frequent events, focus on preservation of load For large events, multiple contingencies, or major capacity imbalances,

need to contain it Sensitivity studies with respect to modeling uncertainty are required for

events that are initiated by large faults

MVWG will perform studies and come up with recommended performance guidelines that align with the white paper to support WECC-0100 regarding the transient voltage performance criteria

System Model Validation

May 30 2013 Event Validation Report

MVWG approved the “Model Validation and System Performance Analysis for PDCI RAS Event that Occurred on May 30, 2013” Report

Posted on website:WECC MVWG > Documents > Approved Documents

System Model Validation WECC staff has developed a Sep 8, 2011 case for model

validation, available to operating entities on request MVWG is continuing to improve the process to develop

future model validation cases Using WSM data, EMS data, PI data Created a spreadsheet of key info to collect data from utilities

Additional event cases are being developed: April 29, 2013 July 2, 2013 July 4, 2013

System Model Validation MVWG is participating in the TSS WBRTF effort MVWG contract with GE to convert WECC dyd data to

an “element code” definition with WSM GE presented update of node-breaker capabilities in PSLF

version 19 beta Uses EMS labels for devices (e.g. bus LID) – provides capability

to import WSM node-breaker model data into PSLF Has provided benefits to reconciling modeling differences,

identifying and fixing modeling discrepancies Final deliverable should be completed in the next few months

PTI presented PSSE node-breaker format features – under development

Generator Modeling, Testing, and Model Validation

Synchronous Generator, Excitation and Turbine Control Models Frequency Response Tool Recent Disturbance Events Power Plant Model Validation Tools Power Plant Model Data Task Force Excitation Model Update Governor Modeling

Frequency Response Tool

BPA Generator Frequency Response Tool available Uses PI data

Eric Bakie (IPCO) presented an improved Generator Frequency Response Tool Incorporates PPMV tool for model validation Includes batch processing, for multiple units and

multiple events Training will be provided when tool is made available

Recent Disturbance Events

Jan 29, 2014 @ 6:47:06 PT – Freq dropped to 59.75 Hz Jan 29, 2014 @ 7:03:58 PT – Freq dropped to 59.78 Hz Feb 2, 2014 @ 11:29:32 PT – Freq dropped to 59.87 Hz Feb 21, 2014 @ 10:14:16 PT – Freq dropped to 59.88 Hz Apr 9, 2014 @ 17:33 PT – Freq dropped to 59.92 Hz Apr 15, 2014 @ 05:46:00 PT – Freq dropped to 59.89 Hz Apr 15, 2014 @ 14:43:10 PT – Freq dropped to 59.85 Hz Apr 17, 2014 @ 16:21:03 PT – Freq dropped to 59.89 Hz Apr 21, 2014 @ 10:41:43 PT – Freq dropped to 59.87 Hz Apr 29, 2014 @ 05:23:28 PT – Freq dropped to 59.89 Hz

Power Plant Model Validation Tools Enhanced tool for verifying generator response

“Dynamic Generator Testing.zip” is available on the WECC TSS Base Cases > Data Checking Tools website

Power Plant Model Validation (PPMV) version 1B using PSLF play-in function is available on the WECC MVWG PPMDTF Documents website

Frequency response tool “Gen_Freq_Response.zip” is available to help analyze generator response to frequency disturbances

John Undrill’s data checking tool is posted in the For Generators area in Generator Testing Program Folder

Power Plant Model Data Task Force Reviewed the most recent list of suspected errors – if

there are additional errors suspected, continue to send them to Kent

Will include suspect data errors related to “xcomp” model – sister units should not have a positive xcomp unless there is a ccomp model

Include check that Pmax in powerflow should be less than the governor capability mwcap or there will be an initialization error

MVWG will work with SRWG to incorporate additional data checks into the base case review process

Excitation Models IEEE Standard 421.5 on excitation models is hopefully

up for ballot soon Includes approximately 30 excitation models All include HV and LV gates to incorporate OEL and UEL models

More discussion will be needed to determine which model(s) WECC will recommend to be the approved

Currently OEL1 is WECC approved UEL1 and UEL2 have been recommended to be

implemented in the programs

Governor Modeling Starting an effort to review hydro turbines and hydro

governors – lead TBD Hydro governor models and corresponding

documentation are to be reviewed and changed as necessary in the programs to include the non-windup limits on the PI controller: h6b, pidgov, hyg3 and gpwscc (or wshygp in PSSE).

HVDC Modeling

HVDC Modeling

Conventional point-to-point HVDC Dynamic model: under development

Investigating discrepancies between the EPRI and Siemens benchmark test case

Additional tests will be performed to ensure consistent results

Updates to report will be made as an ongoing effort

VSC point-to-point HVDC Powerflow model

Implemented in PSSE, beta in PowerWorld, beta in PSLF Testing is underway

Dynamic model: two proposals are being discussed Memo by Siemens is currently under review by task force

HVDC Modeling

Ongoing Issues Trans Bay DC model still needs to be validated PDCI Modeling

Sylmar model still needs to be validated Celilo is expected to be replaced in 2016, the updated model

is in progress

Other Items

Other Items

NERC Updates WECC Project Updates

MSRATF Update – RAS/Relay Modeling Program Updates – PSLF, PSSE,

PowerWorld, and Powertech

NERC Updates

Eric Allen (NERC) provided updates MOD-032-1 (modeling data) and MOD-033-1 (validation)

are approved and filed for regulatory approval Update: FERC approved on May 1, 2014

NERC MWG efforts: Node-breaker modeling – implementation targeted for December

2015 Standardization of models – initial draft for powerflow and

dynamic models are completed, not intended to override interregional lists

Developing a list of issues for sharing data between entities when events occur

WECC Project Updates

WECC-0101 SAR Gen Validation Policy Drafting team chaired by Shawn Patterson USBR Draft variance has been posted for comment, due April 28th

WECC-0099 PSS Effectiveness Drafting team formed (consists of Control Work Group), chaired

by Martin Bauer USBR First meeting held in March 2014 Additional studies by MVWG will be performed to support this

effort

Next Meetings & Workshops

Next Meetings & Workshops

June 17-19 in Salt Lake City, hosted by WECC Renewable (Wind/Solar) Modeling Workshop -- June 17th all day MVWG Meeting -- June 18th all day & June 19th morning

November 18-20 in Albuquerque NM, hosted by Sandia National Laboratories REMTF Meeting -- Nov 18th afternoon & Nov 19th morning MVWG Meeting -- Nov 19th afternoon & Nov 20th all day

LMTF, HVDCTF and PPMDTF will meet independently from the main M&VWG meeting.

Questions ?