MOD-026-1 MOD-027-1 MOD-032-1 Model Data Requirements & Reporting

Procedures

Compliance Document

Issue Date: May 2016

Version: 7

Approved by:

Brian Whalen Director, Transmission System Planning

Sachin Verma Manager, Network & IRP Transmission Planning

MOD-026-1 MOD-027-1 MOD-032-1

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Contents Version History .............................................................................................................................................. 3

Purpose ......................................................................................................................................................... 4

Overview ....................................................................................................................................................... 5

Data Collection .............................................................................................................................................. 6

Generator Owners .................................................................................................................................... 6

Applicability ........................................................................................................................................... 6

Timeline ................................................................................................................................................. 6

Transmission Information for Testing ................................................................................................... 6

Data Requirements ............................................................................................................................... 7

Instructions for Dynamic Data Submittal .............................................................................................. 8

Load Serving Entities ............................................................................................................................... 11

Transmission Owners .............................................................................................................................. 11

Model Development ................................................................................................................................... 12

Data Format ............................................................................................................................................ 12

Level of Detail ......................................................................................................................................... 12

Case Types ............................................................................................................................................... 12

Transmission Projects ............................................................................................................................. 12

Load & Generation .................................................................................................................................. 12

Short Circuit Data .................................................................................................................................... 12

WECC Data Submittal Methodology ....................................................................................................... 13

MOD-032-1 Attachment 1 .......................................................................................................................... 14

Steady State ............................................................................................................................................ 14

Dynamics ................................................................................................................................................. 15

Short Circuit ............................................................................................................................................ 15

Sub-Synchronous Resonance (SSR) & Control Interaction (SSCI) ............................................................... 15

Sample Machine Torsional Data Form .................................................................................................... 16

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Version History Version

No. Issue Date Name Description or reason for revision

1 2015-06-29 Hutchins Initial version

2 2015-07-21 Hutchins Added "Power Flow Model Development" -> "Short Circuit

Data" narrative.

3 2015-09-11 Hutchins Revised section "Power Flow Model Development" -> "Case

Types & Data Submission".

4 2015-09-15 Hutchins Revised footnote on "Case Types & Data Submission".

5 2015-11-03 Hutchins

Removed "ModelRecords@Share.NVEnergy.com" email

address, added section for "WECC Data Submittal

Methodology".

6 2016-06-27 Hutchins

Minor style edits & changes to wording. Added Generator

Data Requirements based on the needs of System Protection.

Moved Load data requirements to MOD-031 document on

OASIS. Added SSR & SSCI sections.

7 2017-12-29 Hutchins Added a requirement for generator owners to submit Out of

Step (78) protection information, including settings if enabled.

MOD-026-1 MOD-027-1 MOD-032-1

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Purpose NV Energy develops powerflow and dynamic models in collaboration with the Western Electricity

Coordinating Council (WECC), its assigned Electric Reliability Organization (ERO) and Regional

Compliance Enforcement Authority. These models are used for Transmission-level analysis of the power

system by NV Energy and its neighboring utilities.

NV Energy as a NERC registered Planning Coordinator (PC), and its Transmission Planners (TPs) have

jointly established a set of common data requirements and reporting procedures for submitting steady

state, dynamic, and short circuit modeling data as set forth in this document.1

The purpose of this document is to outline NV Energy’s data reporting requirements and procedures

necessary to facilitate accurate modeling of the transmission system in a manner compliant with NERC

MOD standards2.

Pursuant to NERC requirements3, this document and the corresponding attachments are hosted at the

following online location:

http://www.oatioasis.com/nevp/

“Transmission Planning Policy” -> “MOD-026-027-032 Policy”

Any questions and corresponding data communications shall be submitted to NV Energy’s Transmission

Planning Department via the following two email addresses:

To: BaseCase@NVEnergy.com CC: TransmissionAdmin@NVEnergy.com

The first email address is for communications with NV Energy, the second is required for record keeping

purposes.

1 MOD-032-1 R1 2 Specifically MOD-026-1, MOD-027-1, and MOD-032-1 3 MOD-032-1 R1.3

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Overview WECC compiles Western Interconnection models on a regular basis for use in transmission analysis. As a

member of WECC, NV Energy is required to prepare modeling data for WECC for each compilation. NV

Energy’s data submittal timelines and schedules are determined on a yearly basis by WECC. For these

submittals, it is necessary for NV Energy to gather accurate, up-to-date information from the multiple

data owners within its Balancing Authority Area. On an annual basis, NV Energy sends requests to these

data owners for information necessary to support the creation of interconnection-wide cases.

These data owners include:

Transmission Owners (TO)

Load Serving Entities (LSE)

Generator Owners (GO)

Data format and submittal procedures are described on the following pages, and differ for each type of

Data Owner.

NV Energy has two processes used to collaborate with WECC and produce models of the transmission

network:

1. Data Collection and Aggregation

2. Model Development for WECC Requested Model Submittals

These processes function in parallel.

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Data Collection

Generator Owners

Applicability Generator Owners who meet one of the below applicability requirements shall submit data to NV

Energy as outlined in this document.

NERC

o Individual generating unit greater than 75 MVA (gross nameplate rating).

o Individual generating plant consisting of multiple generating units that are directly

connected at a common BES bus with total generation greater than 75 MVA (gross

aggregate nameplate rating).

o A technically justified unit that meets NERC registry criteria but is not otherwise included

in the above Applicability sections and is requested by the Transmission Planner.

WECC

o Generation Facilities connected at 60 kV or higher voltage with 10 MVA or larger individual

capacity or 20 MVA aggregate

Timeline Per WECC & NERC standards, Generator Owners who meet the above requirements shall perform

testing:

No later than 180 days after the new Generating Facility is released for Commercial Operation

No later than 180 days after an existing generating unit re-starts Commercial Operation with

modified equipment, control settings, or software that influences the behavior of the plant with

respect to the grid

At least once every five (5) years

NV Energy will send a request for any necessary generation data on an annual basis.4

Transmission Information for Testing NERC MOD standards 26 and 27 requirement R1 specifies certain materials to be provided by the

Transmission Planner (NV Energy) to Generation Owners within 90 days upon receipt of a request from

the Generation Owners. The materials required are the following:

NERC MOD-26-1

o List of acceptable excitation control system or plant Volt/VAR control function dynamic

models

o Instructions for obtaining block diagrams and/or data sheets for acceptable models

o Existing model data for the Generator Owner’s existing units currently used in the

Transmission Planner’s dynamic database

NERC MOD-27-1

4 MOD-032-1 R1.2.4

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o List of acceptable turbine/governor and load control or active power/frequency control

dynamic models

o Instructions for obtaining block diagrams and/or data sheets for acceptable models

o Existing model data for the Generator Owner’s existing units currently used in the

Transmission Planner’s dynamic database

The following documents provide most of the required materials outlined in NERC MOD 26 and 27, and

are publicly available via WECC’s website, and the NEVP OATI OASIS5 site:

WECC Data Preparation Manual.pdf

o This document should be used as an instruction manual on how to prepare the dynamic

data for submittal to NV Energy. In particular, Section VI - 1 Dynamic Data Requirements

– Generators, should be adhered to when preparing the dynamic models.

WECC Solar Plant Dynamic Modeling Guidelines.pdf

o To be used by solar generators in conjunction with the WECC Data Preparation Manual

WECC Wind Plant Dynamic Modeling Guidelines.pdf

o To be used by wind generators in conjunction with the WECC Data Preparation Manual

WECC ApprovedDynamicModelsMarch2016.pdf

o This document provides the “list of acceptable excitation control system, Volt/VAR control

function dynamic models and acceptable turbine/governor and load control or active

power/frequency dynamic models.” NV Energy will only accept GE-PSLF models listed as

“approved” on this list.

Generating Facility Data, Testing and Model Validation Requirements.pdf

o This document should be used to determine the methods by which testing and model

validation should be conducted to meet the requirements of MOD 26 and 27.

The following is non-public information6, and is provided upon request within 90 days:

Current Generator Model from Master Dynamics File “Generator.dyd”

o This text file contains the current model being used by NV Energy and WECC to represent

the Generator(s) in question.

Data Requirements NV Energy requires the following information for proper modeling of interconnected generation

facilities. Please note, any data submitted must be legible:

Oneline Diagram of the Plant

Dynamic data (*.dyd) produced based on the instructions below

Reactive Capability Curves with limitations identified (For Example, Under-Excitation Limiter)

Under-Frequency & Voltage relay trip settings in the following format:

5 Most MOD-026-1 R1 & MOD-027-1 R1 information is provided publicly: http://www.oasis.oati.com/NEVP/ 6 Existing Generator Models are provided upon request within 90 days to satisfy the remainder of MOD-026-1 R1 & MOD-027-1 R1 requirements.

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o Generator Step Up Transformer:

o Nameplate

o Tap Position

o Test Report

Maximum Station Service Level (MW & MVAR)

Maximum Net Generator Output Capability in:

o Summer

o Winter

Short Circuit Model Data

o Generator neutral resistor size, or confirmation there is no neutral resistor

o Negative Sequence & Zero Sequence Impedances

o For Grounding Transformers, either:

A Nameplate Photo, or

A confirmation that there are no Grounding Transformers at the site

o For Inverter Driven Generators:

Wind

Type 1, 2, 3: Generator Reactance (Xd, Xq, X’d, X’q, X’’d, X’’q)

Type 3 & 4: Fault Current Multiplier

Solar

Fault Current Multiplier

Steady state data for wind & solar generators. Please follow the WECC guidelines for providing this

information.

Information regarding Out of Step (78) protection functions. Is it available/unavailable? If available,

is the function enabled, and what are the settings?

NV Energy will request any additional information as necessary, including but not limited to:

Data in MOD-032-1 Attachment 1

Machine Torsional Data (For Sub-Synchronous Resonance Studies)

Instructions for Dynamic Data Submittal

Complete unit testing by following the procedures outlined in the “Generating Facility Data, Testing

and Model Validation Requirements” document attached.

Using only models from the “WECC Approved Dynamic Model Library” and the GE PSLF block

diagrams and parameters found in the PSLF user’s manual; develop a model for the excitation

and/or governor systems. PSLF licensees will have access to the PSLF documentation already in

the provided user’s manual. Those that do not license the GE PSLF program may obtain copies of

kV Time (Seconds) Hz Time (Seconds)

Voltage Trip Settings Frequency Trip Settings

kV Base Frequency Base (Hz)

60

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the Dynamic Simulation Data Export/Import document by contacting GE (pslf.sales@ge.com) and

signing a Non-Disclosure Agreement with GE. Ensure that the dynamic model adheres to the

requirements outlined in the “WECC Data Preparation Manual”

Replace/add the new excitation and/or governor model to the “Generator.dyd” file provided.

Ensure that the models are associated with the same bus as the generator provided in the

“Generator.dyd” file.

Save the file as a “.dyd” text file with your generator’s name. Also include an excel table with all

tested parameters listed for data validation purposes.

Communication shall be submitted via the email addresses provided at the beginning of this document.

NV Energy will provide a written response to the Generation Owner within 90 days following receipt of

the new modeling data.7

If you have any questions, please do not hesitate to contact NV Energy’s Transmission Planning

Department.

7 MOD-026-1 R6 & MOD-027-1 R6

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Generator Data Reporting Procedure Outline (MOD-026 & MOD-027)

Generator OwnerTransmission Planner

Review Generator Compliance List Annually

Send out Request to Generator Owners

Which Generators meet the threshold?

10 MVA Single20 MVA Aggregate

Formal Request for Modeling Instructions. Send to Transmission

Planner

Provide instructions for submittal including: List of acceptable models (OASIS) How to attain block diagrams of acceptable models (OASIS) Existing model data (Provided upon request within 90 days)90 Days

Review Generator Model

90 Days

Provide written response to Transmission Planner including plan to perform model re-verification

Is the model usable?

No

Provide technical description to Generation Owner explaining why the

model is not useable

Yes

Provide written notice to Generation Owner that

model is useable

90 Days

Update Generator Compliance List

Store Verified Data, Submit to WECC

Await next scheduled compliance date

Provide test report and PSLF model per instructions sent by

Transmission Planner

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Load Serving Entities Annually8, NV Energy requests updated load forecast data. The specifications for load forecast data and

timelines are included in NV Energy’s MOD-031-2 Demand and Energy Data document, posted publicly

on OATI OASIS at the following location:

http://www.oasis.oati.com/NEVP/

Transmission Owners Transmission Owners (TOs) within NV Energy’s BA are responsible for reviewing the model of their own

system elements during the WECC Base-Case Review period9. Review shall be done in collaboration with

NV Energy to ensure accurate steady state, dynamic, and short circuit data. The data required by TOs is

outlined in the “MOD-032-01 Attachment 1 Requirements” section of this document. Transmission

Owners are required to follow the timelines for data submittals as determined by WECC. Transmission

Owners are also required to follow the requirements set out in WECC’s Data Preparation Manual. Any

corrections to powerflow or dynamic modeling data must be submitted NV Energy in GE PSLF format.

Communication shall be submitted via the email addresses provided at the beginning of this document.

8 MOD-032-1 R1.2.4 9 MOD-032-1 R1.2.4

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Model Development

Data Format10 NV Energy’s powerflow and dynamic models are maintained in GE PSLF format. Data requirements are

specified by WECC, and any data submitted by the Data Owner(s) to WECC through NV Energy must

conform to all specifications required by WECC. Please refer to the WECC Data Preparation Manual. Any

other Data Submittal Format requirements are outlined in this document.

Level of Detail11 Where necessary, NV Energy’s models are more detailed than required by WECC for purposes of

accuracy and/or improving the level of usefulness of the data. NV Energy generally maintains models

with the following level of detail for Power Flow cases:

All equipment 55kV and above is modeled

Generators are modeled down to the low-side of the GSU

Loads are modeled as lump sums on the transmission busses. In cases where SCADA measurements

are taken on the low-side of the Distribution Transformer(s), NV Energy may model down to the

distribution bus.

Case Types12 MOD-032-1 requires data to be submitted at least once every 13 months. WECC releases a case-building

schedule on an annual basis. The schedule includes case types to be modeled, and tentative due dates.

NV Energy collaborates with WECC to submit all requested cases.

Transmission Projects Transmission projects with high certainty (contracts, for example) are modeled by NV Energy. Which

projects are modeled in WECC cases is at the discretion of NV Energy’s Transmission Planning

department.

Load & Generation Models submitted by NV Energy to WECC have total BA load levels which match the latest forecast

numbers to within +1% to -5%. If NV Energy’s existing generation is not sufficient to meet the forecasted

load levels, NV Energy will model minimal levels of generation proposed in the NPC & SPPC Triennial

Integrated Resource Plan (IRP) filing. Prior to scaling loads, a snapshot of NV Energy’s loads for the

season are applied to the case.

Short Circuit Data MOD-032-1 requires that short circuit data should be shared openly between applicable NERC functional

entities. This data should be provided upon request by applicable NERC functional entities in the data

owners preferred software format. NV Energy will address short circuit data gathering on a case-by-case

10 MOD-032-1 R1.2.1 11 MOD-032-1 R1.2.2 12 MOD-032-1 R1.2.3

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basis via Email requests. Responses may be submitted to the email addresses at the beginning of this

document. This data will be compiled and provided to WECC upon request.13

WECC Data Submittal Methodology14 Two individuals are assigned the role of “Area Coordinator” to ensure there is a primary and a backup.

When formal requests are received by WECC15, the deadlines are added to both Area Coordinator’s

Outlook calendars with reminders to ensure no data requests are missed. Both individuals are fully

trained on creating WECC cases from scratch, including:

How to properly maintain the “Master.sav” case and Master Project EPC files

o Master.sav represents the existing system

o Master Project EPCs represent future projects with some level of certainty

How to apply a load distribution from a seasonal snapshot to a case, then scale the loads to match

a forecast

How to dispatch generation in an economic fashion

How to coordinate interchanges with neighboring areas

How to adjust shunts and generator voltage set-points to properly regulate voltage

How to run SSTools contingency analysis on a case and correct case-building errors prior to

submittal

How to handle case review and comments

WECC cases are submitted to:

BaseCase@WECC.biz

BaseCase@NVEnergy.com

TransmissionAdmin@NVEnergy.com

13 At present, there is no formal process in place for submitting short circuit data to WECC. Short circuit data will be provided to WECC and other MOD-032 applicable entities upon request. 14 MOD-032-1 R4 15 MOD-032-1 R1.2.4

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MOD-032-1 Attachment 116

Steady State 1. Each bus [TO]

a. nominal voltage

b. area, zone and owner

2. Aggregate Demand [LSE]

a. real and reactive power*

b. in-service status*

3. Generating Units [GO, RP (for future planned resources only)]

a. real power capabilities - gross maximum and minimum values

b. reactive power capabilities - maximum and minimum values at real power capabilities in

3a above

c. station service auxiliary load for normal plant configuration (provide data in the same

manner as that required for aggregate Demand under item 2, above).

d. regulated bus* and voltage set point* (as typically provided by the TOP)

e. machine MVA base

f. generator step up transformer data (provide same data as that required for transformer

under item 6, below)

g. generator type (hydro, wind, fossil, solar, nuclear, etc)

h. in-service status*

4. AC Transmission Line or Circuit [TO]

a. impedance parameters (positive sequence)

b. susceptance (line charging)

c. ratings (normal and emergency)*

d. in-service status*

5. DC Transmission systems [TO]

6. Transformer (voltage and phase-shifting) [TO]

a. nominal voltages of windings

b. impedance(s)

c. tap ratios (voltage or phase angle)*

d. minimum and maximum tap position limits

e. number of tap positions (for both the ULTC and NLTC)

f. regulated bus (for voltage regulating transformers)*

g. ratings (normal and emergency)*

h. in-service status*

7. Reactive compensation (shunt capacitors and reactors) [TO]

a. admittances (MVARs) of each capacitor and reactor

b. regulated voltage band limits* (if mode of operation not fixed)

c. mode of operation (fixed, discrete, continuous, etc.)

16 MOD-032-1 R1.1

MOD-026-1 MOD-027-1 MOD-032-1

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d. regulated bus* (if mode of operation not fixed)

e. in-service status*

8. Static VAR Systems [TO]

a. reactive limits

b. voltage set point*

c. fixed/switched shunt, if applicable

d. in-service status*

9. Other information requested by the Planning Coordinator or Transmission Planner necessary for

modeling purposes. [BA, GO, LSE, TO, TSP]

Dynamics 1. Generator [GO, RP (for future planned resources only)]

2. Excitation System [GO, RP(for future planned resources only)]

3. Governor [GO, RP(for future planned resources only)]

4. Power System Stabilizer [GO, RP(for future planned resources only)]

5. Demand [LSE]

6. Wind Turbine Data [GO]

7. Photovoltaic systems [GO]

8. Static VAR Systems and FACTS [GO, TO, LSE]

9. DC system models [TO]

10. Other information requested by the Planning Coordinator or Transmission Planner necessary for

modeling purposes. [BA, GO, LSE, TO, TSP]

Short Circuit 1. Provide for all applicable elements in column “steady-state” [GO, RP, TO]

a. Positive Sequence Data

b. Negative Sequence Data

c. Zero Sequence Data

2. Mutual Line Impedance Data [TO]

3. Other information requested by the Planning Coordinator or Transmission Planner necessary for

modeling

Sub-Synchronous Resonance (SSR) & Control Interaction (SSCI) SSR & SSCI are phenomena, usually associated with series capacitors, of low frequency oscillations in the

power system. SSR may cause severe physical damage to a generator’s shaft; SSCI may interfere with

proper operation of control schemes (including power inverters). Performing analysis of SSR & SSCI

requires two types of data: Machine Torsional Data, and SSCI Data. These both may be requested

pursuant to MOD-032-1 R1 (see “Dynamics”, item 10, “Other Information”). Such a request will typically

be driven by generation locations electrically close to series capacitors, and shall be provided to NV

Energy upon request. An example of Machine Torsional Data is shown below for reference.

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Sample Machine Torsional Data Form

Sample Sheet of Machine Torsional Data

Unit

Type of turbine

MVA

Base kV

Torsional Mode

Modal Frequency, fn (Hz)

60 Hz Compliment of fn, fe (Hz)

Modal Inertia, Hn (s @ MVA)

Modal Inertia, Hn (s @ 100 MVA)

Estimated No-Load log-dec

Estimated No-Load Damping (rad/s)

Sample Sheet of Machine Shaft Data (MVA rating, Mechanical Synchronous Speed RPM)

Mass Name Inertia Constant (J) Damping (D) Spring Constant (K)

HP J1= D1=

K12=

IP J2= D2=

K23=

LP1 J3= D3=

K34=

LP2 J4= D4=

K45=

Generator J5= D5=

K56=

Exciter J6= D6=

EX

IP LP1 LP2

GENHPK23

J1

K12 K34 K45 K56

J2 J3 J4 J5 J6