pas update - nerc highlights and...3 nerc alert issued on 6/20/17 1. ensure inverter controls...

PAS Update

Paul Kure, Chair, NERC Performance Analysis Subcommittee Meeting Planning Committee MeetingJune 5-6, 2018

RELIABILITY | ACCOUNTABILITY2

PAS update• PAS and working group work plans updated Working groups addressing:o SOR report analysis and contento Training on the applicationso Improving data quality and collection

PAS to review SOR and metrics for future revision after SOR report published

PAS Update

Tim Fryfogle, RAS ChairPlanning Committee MeetingJune 5-6, 2018

Reliability Assessment SubcommitteeStatus Report


Reliability Assessment SubcommitteeOutline

Summary• 2018 Summer Reliability Assessment • 2018 Long Term Reliability Assessment• Probabilistic Assessment Working Group• Schedule• Essential Reliability Services Measure 6 Parameter Update


Reliability Assessment Subcommittee2018 Summer Reliability Assessment

2018 Summer Reliability Assessment

Most assessment areas demonstrate resource adequacy by maintaining sufficient Anticipated Resources to meet and exceed their planning Reference Margin Levels for this summer.

The Anticipated Reserve Margin for ERCOT falls to 10.9 percent, below their Reference Margin Level of 13.75 percent for this summer. During extreme weather, there is an increasing risk of operational issues when reserve margins are tight. If forecasted summer conditions materialize, ERCOT may need to rely on emergency operating procedures (EOPs) and import capabilities from neighboring Areas.


Reliability Assessment Subcommittee2018 Long-Term Reliability Assessment


• Technical Reference Report on Probabilistic Adequacy and Measures PC vote June

• 2018 Core ProbA High priority in 2018 RAS Approved Scenario Base Case Integration into LTRA RAS full report review by November 2018 PC Approval 4Q, 2018

• Data Collection Approaches and Recommendations Report Moderate priority in 2019

PAWG Work Plan


2018 ProbA Schedule


Reliability Assessment SubcommitteeSchedule

July 17-19 Toronto, Canada

• LTRA Peer ReviewAugust 21-22 Valley Forge, PJM• Review ProbA dashboards• Review LTRA• WRA kickoffNovember 13-15 San Antonio, Texas• ProbA comprehensive report


• Essential Reliability Services Measure 6 Sub team finalized

– Data Forms– Narrative Questions

Kick off call for volunteers of the pilot study– May 30– ERCOT, PJM, MISO, CAISO, Ontario, and ISO-New England

Reliability Assessment SubcommitteeERS Measure 6

SPCS Work Plan

Mark Gutzmann, SPCS ChairNERC Planning Committee MeetingJune 5-6, 2018


• PRC-023 Implementation Guidance document PC action complete Endorsed by PC December 2017

• PRC-024 Implementation Guidance document PC Action complete Submitted for ERO Enterprise endorsement in January 2018

• PRC-019 Implementation Guidance document Planning and prioritizing work Anticipated Q3 2018 completion

• Discuss potential PRC-025 IG with PCEC SPCS reviewed and found guidance within Standard is sufficient

• Guidance on controllable device settings SPCS reviewed and found it is being adequately addressed by other works

SPCS Work Plan


• Risks of shorter technology lives for protection and control components Tabled at this time as SPCS believes industry is aware and addressing

potential risks

• Promote the development of industry guidelines on protection and control system management Being addressed by SPCS participation at industry wide forum and

conferences

• PRC standards and related NERC materials SPSC coordinating with ERO Enterprise

• Identify industry skill gaps Being addressed by SPCS participation at industry wide forums and

conferences

SPCS Work Plan

IRPTF Update

Allen D. Schriver, P.E.

General Manager of Reliability Standards and Compliance

NextEra Energy

and

COO North American Generator [email protected]

June 5, 2018

mailto:[email protected]

2

Blue Cut Fire Event on 8/16/16

Loss of 1200 MW

1. Loss of inverters predominantly due to

erroneous tripping due to mis-calculated

frequency during transients

2. NERC/WECC ad hoc task force created

to identify causes

3. Published disturbance report in June

2017

4. Key Findings:

Use of momentary cessation

Frequency-related tripping caused by

erroneous instantaneous frequency

measurements

IRPTF Update

3

NERC Alert issued on

6/20/17

1. Ensure inverter controls won’t trip

due to an erroneous instantaneous

frequency measurement during

transients on the system

2. If you momentarily cease injecting

current outside of the PRC-024 ride

through, return to injecting current

as soon as practical but within 5

seconds

3. If the equipment cannot meet 1 & 2,

RC’s and BA’s should consider the

potential for loss of these resources

during transmission faults

IRPTF Update

4

Resource Loss Protection

Criteria Recommendations

February 2018

1. No change to the Western Interconnection

RLPC is recommended, based on the

studies performed by IRPTF

2. Modeling improvements to accurately model

momentary cessation should be made by all

GOs of solar PV facilities connected to the

BPS

3. Momentary cessation during transient low

voltage conditions should be eliminated for

future solar PV resources connecting to the

BPS, and should be mitigated to the greatest

extent possible for existing solar PV

resources connected to the BPS

IRPTF Update

5

Canyon 2 Fire Event on 10/09/17

Loss of 682 MW, 937 MW

1. No erroneous frequency tripping

2. Momentary cessation outside of 1.1 – 0.9 PU

3. Plant level controller slowing return to pre-

disturbance output following momentary

cessation

4. Misinterpretation of PRC-024 curve as outside

of curve is “must trip”

5. DC reverse current protection opened the

inverter primary circuit breaker

IRPTF Update

6

NERC Alert issued on 5/01/18

1. Ensure that the dynamic model(s)

accurately represent the dynamic

performance including momentary

cessation

2. Eliminate momentary cessation of current

injection to the greatest extent possible

consistent with equipment capability

3. Ensure that inverter restoration from

momentary cessation is not impeded by

plant-level control ramp rates. 4. Inverter voltage trip settings should be

based on physical equipment limitations to

protect the inverter, as necessary

5. Implement inverter DC reverse current

protection settings based on equipment

limitations, such that the resource will not

trip unnecessarily during high voltage

transients on the BPS

IRPTF Update

7

Reliability Guideline

1. Distributed for comment on

5/04/18

2. Comments due 6/29/18

IRPTF Update

Thank you!

www.GeneratorForum.org

http://www.generatorforum.org/

Geomagnetic Disturbance Task Force (GMDTF)Ian Grant, TVAPlanning Committee MeetingJune 5, 2018


• FERC issued Notice of NERC GMD Research Plan filing (RM 15-11-2) Public comment April 20 – May 21, 2018 No specific changes recommended by commenters

• FERC issued Notice of Proposed Rulemaking (NOPR) on proposed TPL-007-2

• GMDTF and NERC completed review of comments and proposed revisions to NERC Rules of Procedure Section 1600 Data Request for GMD Data PC Meeting Agenda Item 5.a

Significant Updates


• GMDTF Work Plan Item 6• EPRI developed an open-source tool for

transformer thermal assessments Transmission Owners and Generator Owners

can use to meet TPL-007 requirements Use default transformer heating models or user-

supplied models

• Reviewed during January GMDTF meeting and beta tested by GMDTF participants

• In process for release through EPRI.com (free of charge)

Transformer Thermal Assessment Tool


• FERC NOPR issued on May 17 proposes to approve TPL-007-2 and direct NERC to develop modifications requiring Corrective Action Plans (CAP) to address supplemental GMD event Proposed TPL-007-2 requires entities to consider mitigation for the

supplemental GMD event but does not require CAP (Requirement R8 Part 8.3)

• NOPR also seeks comment on a proposed directive that would require entities to obtain NERC approval when CAP deadlines for GMD Vulnerability Assessment cannot be met Proposed TPL-007-2 requires entities to implement CAPs for the

benchmark GMD Event and complete actions by prescribed deadlines, but deadlines can be extended by entities (Requirement R7)

• FERC established 60 day comment period for NOPR

TPL-007-2 NOPR


• GMDTF meets June 13 at EPRI in Charlotte, NC• Agenda topics include: Update on EPRI project tasks GMD Data Request / Planning for Data Reporting Instruction development Entity presentations on TPL-007-1 implementation GMD-related harmonics impact assessment approaches

Future Activities


TPL-007-1 Implementation

January 1, 2017*

July 2017•R1•Identify Responsibilities

July 2018•R2•System Models

January 2019

•R5•GIC Flow Information

January 2021

•R6•Thermal Assessment

January 2022

•R3, R4, and R7•GMD Assessment•Corrective Action Plan

*January 1, 2017 is the first day of the calendar quarter after Order No. 830 became effective. For more info see the Implementation Plan posted on the project page.

http://www.nerc.com/pa/Stand/Project201303GeomagneticDisturbanceMitigation/tpl_007_1_implementation_plan_20141205_clean.pdf


• TPL-007-2 filed January 22, 2018 Includes Supplemental GMD Event

Description for locally-enhanced GMD event assessment

Establishes deadlines for Corrective Action Plans (CAPs) and mitigating actions

Requires processes of obtaining GIC and magnetometer data

• Implementation of TPL-007-1 continues while revised standard is pending approval

Revisions to TPL-007

FERC Docket RM 18-8


NERC GMD Research Plan Objectives

Improved Earth Conductivity

Models

Improved Harmonic Analysis

Capability

00.20.40.60.8

11.21.41.61.8

2

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4

pu fl

ux

Current, pu

Per Unit Saturation Curve

Harmonic Impacts

Transformer Thermal Impacts

Spatial Averaging

Latitude Scaling Factor

Geoelectric Field Evaluation• Work is underway on all Order

No. 830 research objectives

• Support TPL-007 standard

• EPRI will publish technical reports for each objective

Reliability GuidelinePower Plant Model Verification and Testing for Synchronous Machines

Ryan Quint, Advanced Analytics and Modeling, NERCNERC Planning Committee MeetingJune 5-7, 2018


• Guideline created to provide industry with recommended practices and methods for power plant model verification and testing

• Supports activities related to NERC MOD Standards, primarily: MOD-025-2 MOD-026-1 MOD-027-1

• Guidance and technical reference for industry awareness, education, and understanding of how and why these tests are performed

• Intended to support transmission, generation, and testing entities

Background


• Received over 250 comments, addressed all effectively

• Comment themes: Editorial and formatting Clarification of figures and testing

procedures Technical

improvements/modifications Application of test methods Nuclear unit testing Timeline and format of guidance

Comment Period


• SAMS (PPMVTF) requesting approval of the Reliability Guideline: Power Plant Model Verification and Testing for Synchronous Machines,

with final formatting and Publications edits.

Proposed Motion

Reliability GuidelinePower Plant Model Verification for Inverter-Based Resources

Ryan Quint, Advanced Analytics and Modeling, NERCNERC Planning Committee MeetingJune 2018


• Penetration of inverter-based resources continues to increase• Increasingly important that dynamic models accurately match

performance of actual installed equipment in the field• NERC MOD Standards applicable to synchronous generators as

well as inverter-based resources that meet the size criteria• However, verification of inverter-based resources is relatively

new since the technology has not been around nearly as long • Guideline provides recommended practices related to

verification testing, disturbance-based model verification using actual grid disturbances, and modeling practices that should be considered for inverter-based resources

Background


• Inverter-based technologies overview• Applicability to verification and testing standards• Steady-state and dynamics modeling• MOD-025-2 capability testing• PPMV for Type 1 and 2 WPPs• MOD-026-1 verification testing• MOD-027-1 verification testing• Examples

Guideline Outline


Topics Covered

-30 -20 -10 0 10 20 30

HV Mvar

236

238

240

242

244

246

248

250

252

254

Vo

tlag

e (

kV)

150MW Droop Plot, Power > 10%, SC Level = 3000MVA

Simulations HV Control 0% Droop

Measurements

Setpoint

Dead-band

Dead-band

Initial Operating Point

Measured New Operating Point

Simulated New Operating Point


Topics Covered


• Authorization: June 5• Posting: June 11• Comment Period: June 11 – July 27• Response to Comments: July 27 – August 24• Final Approval: September 11

Proposed Timeline


• SAMS (PPMVTF) requesting authorization to post the Reliability Guideline: Power Plant Model Verification for Inverter-Based Resources for a 45-day industry comment period.

Authorization to Post for 45-Day Industry Comment Period

GMD Data RequestNERC Rules of Procedure Section 1600

Ian Grant, Tennessee Valley AuthorityPlanning Committee MeetingJune 5, 2018


• Order No. 830 includes directives for collecting data to “improve our collective understanding” of GMD risk Includes GIC and Magnetometer data NERC is to make data available to the public

• NERC developed a Rules of Procedure Section 1600 data request with GMD Task Force (GMDTF) and technical committee input

Data Collection and Availability


• September 2017 | Draft Presented at GMDTF Meeting • December 2017 | Planning Committee Authorized Posting• January – March 2018 | 45-day comment period Comments were provided by over 30 stakeholders

• Comments, responses, and revisions to the GMD Data Request are posted on GMDTF Project Page

Development Steps

https://www.nerc.com/comm/PC/Pages/Geomagnetic-Disturbance-Task-Force-(GMDTF)-2013.aspx


• Data will be collected for GMD events that meet or exceed KP-7 Historical events back to May 2013 Future events from implementation of data collection program On average, 200 KP-7 GMD events occur in 11-year solar cycle

• Transmission Owners and Generator Owners with GIC and/or magnetometer data are applicable entities Non-U.S. entities are not obligated to participate but are encouraged Reporting by an entity (e.g., EPRI) on behalf of applicable entities is

acceptable

• NERC will make data available to researchers

GMD Data Request Overview


• Data reporting periods will be determined and communicated by NERC Promotes clarity for reporting entities Identification of KP-7 events supported by NOAA Space Weather Prediction

Center Time periods will be designated to capture full duration of the GMD event

(including pre and post-event conditions)

Summary of Changes


• Clarified that reporting entities do not need to provide data that is publicly available Conforms with Order No. 830 (P 93 and note 122)

• Clarified that entities participating in data collection programs (e.g., EPRI SUNBURST) could arrange for data submissions to be made on their behalf

Summary of Changes


• Details added to reporting entity information (Attachment) Date that GIC Monitors and magnetometers were installed Periods during which device is not operating Sampling rate in use

• Revised data reporting parameters for consistency with research conventions Universal Time Coordinate (UTC) convention (YYYY-MM-DD) Magnetometer alignment data

Summary of Changes


• Commenters expressed concerns with making GIC monitor location (latitude and longitude) publicly available GIC monitors may be associated with large power transformers

• Proposed GMD Data Request was not substantively changed Reporting Entities that believe their data is confidential are requested to

provide explanatory information to NERC NERC will make a determination as indicated in Order No. 830 P. 95 and

treat data accordingly

Data Confidentiality


• Critical Energy Infrastructure Information is defined in NERC RoP Section 1501 as: specific engineering, vulnerability, or detailed design information about

proposed or existing Critical Infrastructure that (i) relates details about the production, generation, transportation, transmission, or distribution of energy; (ii) could be useful to a person in planning an attack on Critical Infrastructure; and (iii) does not simply give the location of the Critical Infrastructure.

• Data reporting requirement provides only general location information Nearest tenth of a degree ~ 5-7 mile resolution

Basis for Data Confidentiality Approach


…as a general matter, the Commission does not believe that GIC monitoring and magnetometer data should be treated as Confidential Information pursuant to the NERC Rules of Procedure. (P 89)

…Notwithstanding [the Commission’s] findings here, to the extent any entity seeks confidential treatment of the data it provides to NERC, the burden rests on that entity to justify the confidential treatment. (P 95)

Order No. 830 on Data Confidentiality


• NERC staff and GMDTF seek PC endorsement of the GMD Data Request

• Next steps pending PC endorsement of the GMD Data Request August 2018 | Request NERC Board Approval Q3 2018 | GMDTF and NERC Staff begin developing a Data Reporting

Instructions (DRI)

• NERC staff will continue identifying requirements for information technology application

Requested Action


• NERC Rules of Procedure (RoP) Section 1600 Within the United States, NERC and Regional Entities may request data or

information that is necessary to meet their obligations under Section 215 of the Federal Power Act, as authorized by Section 39.2(d) of the Commission’s regulations, 18 C.F.R. § 39.2(d). (P 1601)

• Data Request Elements Describe why the data is needed, its use and collection method Identify functional entity(ies) Estimate the burden on reporting entities Establish reporting criteria or schedule

• Process 45-day public comment period on NERC’s request NERC Board approval required to issue data request to entity(ies)

Data Request Background


In addition, the Commission directs NERC, pursuant to Section 1600 of the NERC Rules of Procedure, to collect GIC monitoring and magnetometer data from registered entities[*] for the period beginning May 2013, including both data existing as of the date of this order and new data going forward, and to make that information available.

-Order No. 830 P 89

*does not apply to non-U.S. Entities

What Data Will Be Requested


[The Commission] also direct NERC, pursuant to Sections 1500 and 1600 of the NERC Rules of Procedure, to collect and make GIC monitoring and magnetometer data available. We determine that the dissemination of GIC monitoring and magnetometer data will facilitate a greater understanding of GMD events that, over time, will improve Reliability Standard TPL-007-1. The record in this proceeding supports the conclusion that access to GIC monitoring and magnetometer data will help facilitate GMD research, for example, by helping to validate GMD models.

- Order No. 830 P 93

Purpose of Collecting GMD Data

Tim Fryfogle, RAS ChairPlanning Committee MeetingJune 5-6, 2018

Reliability Assessment SubcommitteeScope Document


Reliability Assessment SubcommitteeRAS Scope Document

Summary• RAS scope Highlight the major revision to the document Minor revisions include language that helps with the consistency with other

NERC documents Last time Reliability Assessment Subcommittee Scope was updated was in

2016 Request approval of revised Reliability Assessment Subcommittee Scope


Reliability Assessment SubcommitteeRAS Scope Document

• Revised RAS Scope Document Included language to coordinate review of assigned Essential Reliability Services

forward looking measures with the applicable reporting entities for inclusion in NERC’s assessments

Changed the requirement that if a member does not provide a representative in a timely fashion they must decline the invitation in writing to:o from the “PC” chair o to the “RAS” chair

Updated the membership requirements adding an assessment area representative and an alternate that is not a Region

Added language allowing the RAS to form subcommittees and the requirements of that subcommittee to report to the RAS

Removed language requiring only Regional representatives allowed to become the chair

Removed language regarding the support of the Generation and Transmission Reliability Planning Models Task Force (GTRPMTF) recommendations

Request the Planning Committee approve the revised RAS scope document as submitted with any changes that the PC recommends.

Misoperation Information Data Analysis System Working Group (MIDASWG) Proposal

Paul Kure, Performance Analysis Subcommittee ChairPlanning Committee Meeting June 5-6,2018


Act as industry representative group for Misoperations 1600 data request to performing the following:• Create Data Reporting Instructions (DRI) for consistent reporting

and data quality• Maintain and update DRI• Work with NERC to maintain public reports, including NERC’s

annual State of Reliability Report, provide input and recommendations for additional analysis

• Assist NERC in evaluation of data and development of metrics• Assist in creation of data reporting training• If necessary in the future, assist NERC with updating 1600 data

request

Statement of Purpose


• Group Participants Subject matter experts representing each region Subject matter experts representing NERC SPCS (may be some overlap

with regional subject matter experts) ERO Regional Representatives NERC Liaison

• Request for the group to fall under Performance Analysis Subcommittee (PAS) Consistent with other Section 1600 data request working groups Also expected to interface frequently with System Protection & Control

Subcommittee due to membership and subject matter expertise

Participants & Committee Structure

Accelerated Generation RetirementsSpecial Assessment Update

Mark Olson, Senior Engineer Reliability AssessmentsPlanning Committee Meeting June 6, 2018


• Examine the potential impacts of accelerated generator retirements on: Resource and transmission adequacy BPS reliability in event scenarios (e.g., extreme weather, generator fuel

supply disruptions)

• Recommend improvements to generator retirement planning processes to mitigate risks where appropriate

• Understand potential impacts on future resource mix and reliability

Assessment Objectives


• Describe regional processes for managing generator retirements Timelines and responsibilities for

review and approval Studies performed

• Identify recommendations to mitigate risks from accelerated generator retirements

• Inputs: Regional Entity questionnaire RTO responses to FERC AD 18-7

Assessment Key Parts: Part I


• Analyze industry studies of the potential reliability impact of accelerated generator retirements

• Coordinate with utilities and RTOs to understand transmission implications through power flow studies

• Assess reserves in “polar vortex” scenario

Assessment Key Parts: Part II


• NERC staff calculated generator resources and reserves for various accelerated generation retirement scenarios using 2017 Long-term Reliability Assessment (LTRA) Data Base Case (2022) Low (fewer) retirements High (more) retirements

• Areas: MISO PJM Texas RE – ERCOT NPCC – New England NPCC – New York

Reserves Analysis


• Two scenarios describe amounts of accelerated retirements in coal-fired and nuclear generation through the year 2022 Lower retirement scenario reduces coal-fired generation by 30% /

Nuclear by ~45% Higher retirement scenario reduces coal-fired generation by 60% /

Nuclear by ~75%

• Analysis of unprecedented shifts in generation capacity are justifiable given large degree of uncertainty

Retirement Scenarios


• Projections of declining nuclear power generating capacity vary significantly between reference and sensitivity cases in EIA’s Annual Energy Outlook

EIA Sensitivity Cases

Nuclear Generator Retirement Sensitivity to Cost and Natural Gas Technology. Annual Energy Outlook 2018, U.S. Energy Information Administration (EIA), Nuclear Power Outlook


• Discuss initial observations with PC

High Level Observations


• Initial draft report is in development in coordination with participating planning entities and regions

• NERC staff will seek RAS and ERO-RAPA review of draft report• PC review will be coordinated with PC leadership

Next Steps and Coordination

PC Advisory CommitteeNERC Recommendations

Planning Committee Meeting June 5-6, 2018


• NERC, with industry support should enhance its Reliability Guidelines and/or standards as necessary to include additional planning and operating requirements for analyzing disruptions to the natural gas infrastructure and their impact on the reliable operation of the BPS. The standards/guidelines should include developing and deploying mitigation plans to address reliability risks caused by outages of significant natural gas infrastructure.

SPOD Recommendations


• NERC along with the PC Advisory Group will determine whether additional standards and/or guidelines are necessary to ensure adequate planning has been conducted around the loss of critical natural gas infrastructure. A technical conference will be held in Atlanta, Georgia on July 10, 2018 to develop recommended courses of action.

• PC/PC Advisory Group will report back to the BOT and MRC at November meeting.

SPOD – Next Steps


Session 1: Current Status and Background• As the electric generation portfolio has experienced a significant

shift toward more natural gas resources and less coal and nuclear, planning for the future resource mix has become ever more important. In addition to resource adequacy, fuel assurance helps support grid reliability and resilience. This panel will highlight some of the studies and work completed by EIPC, ERAG, and WECC in regards to natural gas infrastructure and evaluating fuel assurance associated with this paradigm shift.

NERC Technical Conference July 10, 2018


Session 2: Natural Gas Paradigm• The Aliso Canyon outage in Southern California underscored the

increased reliance on natural gas for electric generation as well as the risks associated with potential outages of natural gas infrastructure. NERC’s report on natural gas disruptions underscored the risks of natural gas outages, however, in order to drive solutions it is important to analyze the existing natural gas construct. This panel will provide a background on the natural gas construct, safety rules around natural gas infrastructure, and operating procedures of natural gas pipelines. Representatives from PHMSA, AGA, and API.



Session 3: RTO Perspectives• Market constructs have a different set of circumstances than

vertically integrated utilities. For example, in a market construct firm transportation does not have the same prevalence as is typically seen with the vertically integrated utilities. It is important for planning processes to be in place to account for loss of fuel due to lack of firm transportation, storage, or other reasons. This panel will provide insight into how vertically integrated utilities plan for loss of natural gas versus how ISO/RTOs plan. Similarly the panel will discuss potential recommendations for additional fuel assuredness around natural gas.



Session 4: Potential Solutions and Discussions• NERC, in conjunction with its Planning Committee, has formed

an advisory group to evaluate the NERC recommendations associated with the Potential Impacts of Severe Disruptions to the Natural Gas System Report. Among the directives under consideration are to enhance the existing TPL-001-4 Standard to require detailed Planning Studies taking into account the loss of natural gas infrastructure and demonstration of steps to be taken in the event of a loss of natural gas infrastructure. Another alternative would be to develop an industry guideline detailing requisite steps in regards to planning for the potential loss of natural gas infrastructure. This panel will discuss these, in addition to other potential solution sets.


Technical ReportNERC Modeling Improvements Initiative Update

Ryan Quint, Advanced Analytics and Modeling, NERCNERC Planning Committee MeetingJune 5-6, 2018


• Background on NERC Modeling Improvements Initiative

• Drivers for technical report• Description of NERC activities

to improve modeling

Background


• Interconnection-wide case creation• Case quality assessments and case fidelity• Modeling notifications• Dynamic load modeling• Power plant modeling• Plant-level controls and protection modeling• Interconnection-wide system analysis• Relevant materials

Overview of Technical Report


MOD-032 Designee Feedback Loop


Interconnection-Wide Modeling Framework


• MOD-032 Designee and NERC contacts for case improvements• NERC Case Quality Metrics documentation• NERC Case Quality Metrics Assessment results• NERC case fidelity findings and recommendations for MOD-032

Designee improvements• NERC Approved Dynamic Model List• MOD-032 Designee Approved Model Lists• MOD-032 Designee tracking of case quality improvements

MOD-032 Designee Coordination and Case Improvements


NERC Approved Model List

NERC MOD-032 Designee

Planning Coordinators / Transmission

Planners

Equipment Owners


• Completed in 2015, 2016, and 2017; 2018 in progress• Reasonableness of models and parameters• Each metric receives a performance score (%)• Seeking improvements over time.• Develop recommendations for MOD-032 Designees

NERC Case Quality Metrics Assessments


Modeling Notifications

• EX2000 Excitation System Model

• Use of GENTPJ Generator Model

• Gas Turbine Governor Modeling

• Modeling Momentary Cessation

• Others in progress


• Technical workshop• Dynamic Load Modeling Technical Reference Document• Load model benchmarking• Composite Load Model default data sets• Reliability Guideline: Develop Load Model Composition Data• Reliability Guideline: Modeling DER in Dynamic Load Models• Reliability Guideline: DER Modeling• DER_A model benchmarking

Dynamic Load Modeling(NERC LMTF)


• Power Plant Modeling Technical Workshop• Variable Energy Resource Modeling Workshop• Reliability Guideline: Power Plant Model Verification and Testing

for Synchronous Machines• Reliability Guideline: Power Plant Model Verification for

Inverter-Based Resources• Reliability Guideline: MOD-032-1 Data Requests for GOs• Tech Ref Doc: Turbine-Governor Modeling• Plant-level controls and protection modeling (PCPMTF)

Power Plant Modeling(NERC PPMVTF)


• Eastern Interconnection Frequency Response Analysis• Short Circuit Modeling Coordination• Stability Impacts of Momentary Cessation

Updates on NERC System Analysis


• Continue strengthening MOD-032 Designee feedback loop Track interconnection-wide case improvements Monitor case creation processes and procedures

• Continue developing Modeling Notifications for specific modeling issues

• Continue performing Case Quality Metrics Assessments Identify known modeling issues, report to MOD-032 Designees Support inclusion in software tools Track effects of NERC MOD-026-1 and MOD-027-1 implementation

Recommendations for NERC Effort


• Evolution of Dynamic Models: Focus on evolution of dynamic models, including ensuring that generic models used in interconnection-wide cases accurately represent inverter-based resources.

• Software Implementation of Available Models: Ensure that implementation of available models occurs in a timely and effective manner such that planners and operators of the BPS can use these models in their reliability assessments.

• Capability to Model DER: Capability to model DER as penetration of continues to grow. Ensure consistent and effective capability in software platforms. Engage with software vendors and industry stakeholders in NERC technical subcommittees.

Prioritized Modeling Focus Areas


• Guidance for Turbine-Governor Modeling: Develop guidance for turbine-governor modeling and modeling practices; focus on improved modeling of frequency response in planning cases to improve case fidelity.

• Improved Generic Modeling of Inverter-Based Resources:Continue improving generic renewable energy system models based on the studies and findings developed by industry and NERC, particularly focused on the large disturbance performance that is typically not tested during MOD standards procedures.

• Dynamic Load Modeling Improvements: Continue focus on dynamic load model improvements and modeling practices in the NERC LMTF.

Prioritized Modeling Focus Areas

pas update - nerc highlights and...3 nerc alert issued on 6/20/17 1. ensure inverter controls...

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