System Review Working Group Proposed Implementation of MOD-032-1
Effective R1 July 1, 2015, R2-R4 July 1, 2016
The System Review Working Group (SRWG) is tasked with implementing and monitoring guidelines and
policies pertaining to steady state and dynamic data to support analysis of the reliability of the
Western Interconnection transmission system. (MWD Comments)
Introduction
MOD-032-1 – Data for Power System Modeling and Analysis was approved by FERC May 1, 2014.
Requirement R1 will become effective July 1, 2015. The remainder of the requirements, R2-R4, will
become effective July 1, 2016. The requirements of the new standard are directly related to the
primary task of SRWG as stated above. After review of MOD-032-1 and related SRWG documentation,
SRWG has collectively determined the following actions should be taken:
Action
Responsible entities
Data Preparation Manual modified to align with new Requirements
SRWG
Develop data requirement and reporting procedures for MOD-032-1,
Attachment 1
Each Planning Coordinator and
each Transmission Planner
(jointly develop)
MOD-11 & 13-WECC-CRT-1 needs to be modified or retired
WECC
Establish methodology to account for Planning Coordinator responsibility
in interconnection-wide base cases
SRWG
The following sections outline each of the above actions and present SRWG’s proposed
implementation. Successfully following SRWG’s proposal for each action will help ensure the
development of high quality interconnection-wide cases. Planning Coordinators and Transmission
Planners are also encouraged to share their documentation which will be used to comply with MOD032-1. SRWG will facilitate a forum for sharing and collaborating on the approaches Planning
Coordinators and Transmission Planners are taking in an effort to improve consistency across the
interconnection.
The SRWG will continue to review the implementation plan for MOD-032-1 and make modifications as
appropriate including input from the Planning Coordinator Function Task Force and affected entities.
Data Preparation Manual
The Data Preparation Manual has recently been focused on specifying what data “Member Systems”
need to provide to WECC and a data submittal process in order to develop interconnection-wide cases.
With implementation of MOD-032-1, The Data Preparation Manual could transition to include the data
WESTERN ELECTRICITY COORDINATING COUNCIL
155 North 400 West, Suite 200
Salt Lake City, Utah 84103-1114
SRWG Proposed Implementation of MOD-032-1
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requirements and data submittal process for Planning Coordinators and/or Transmission Planners
submitting data to WECC. The data requirements and reporting procedures jointly developed by each
Planning Coordinator and each Transmission Planner can address and incorporate desires, concerns,
and issues of the applicable entities. Modifying the Data Preparation Manual to apply to Planning
Coordinators and Transmission Planners will help align the WECC processes with NERC standards,
specifically MOD-032-1. Incorporating appropriate parts of the Data Preparation Manual into the
Planning Coordinator’s and Transmission Planner’s jointly developed data requirements and reporting
procedures will also align their processes to ensure consistency with procedures for building
interconnection-wide cases as required in MOD-032-1, R1.2.
[Comment: Need to distinguish the voluntary submission of data by non-NERC registered entities,
e.g., loads or resources connected to distribution voltages, from the mandatory data submitted by
NERC registered entities.]
Proposed modifications to the Data Preparation Manual follow:
1. Restate purpose of the document to align with MOD-032-1 and applicability to Planning
Coordinator and Transmission Planner in their jointly developed data requirements and
reporting procedures
2. State “other information” not included in MOD-032-1, Attachment 1 is also being provided by
Transmission Planners to help create interconnection-wide cases
3. Remove/replace references to MOD-010 through MOD-015
4. Incorporate intent of language in MOD-011 and 013-WECC-CRT-1 as stated below
A proposed revision of the Data Preparation Manual will be included as an appendix.
The proposed data submittal process, which is intended to be described in the Data Preparation
Manual, is depicted in the following diagram. Refer to the proposed draft of the Data Preparation
Manual for definitions to the terms used within the diagram.
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ERO
(WECC InterconnectionWide Models)
3
Planning
Planning
Coordinator
Coordinator
(component model)
Planning
Coordinator
(Data)
A
Balancing Authority
Transmission Planner
Generator Owner
2
Load Serving Entity
1
Resource Planner
B
Trans. Service Provider
WECC
B
data base
Transmission Owner
Data Representative
(Area Coordinator)
B
Transmission
Planner
(Data)
2
Non-Registered Gen
A
Distribution Provider
Not Applicable under the MOD-032-1
Option 1: Applicable entities submit data to TP and PC
Option 2: Applicable entities submit data to TP. TP submits data to PC
Step A: PC or TP submits data to WECC. TP submits additional data for entities not applicable under the MOD-032-1
Step B: PC or TP submits data to Data Representative who submits to WECC
Figure 1: Proposed data submittal process flow diagram [MWD’s revised diagram].
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Data Requirement and Reporting Procedures
The Data Preparation Manual will be applicable to Planning Coordinators, Transmission Planners, and
other WECC members. Planning Coordinators and Transmission Planners may choose to use the Data
Preparation Manual in-part or as a subset of their jointly developed modeling data requirements and
reporting procedures . The reporting procedures between Balancing Authorities, Generator Owners,
Load Serving Entities, Resource Planners, Transmission Owners, Transmission Planners, Transmission
Service Providers, and Planning Coordinators is not addressed by any WECC documentation at this
time.
SRWG is proposing an interconnection wide data requirements and reporting procedure should not be
developed with the intent of Planning Coordinators and Transmission Planners adopting them for
complete compliance with MOD-032-1, R1. Any documentation developed at the WECC level will need
to be supplemented by each Planning Coordinator and Transmission Planner. The Data Preparation
Manual is intended to specify the data format and level of detail to which equipment should be
modeled for developing interconnection-wide cases.
MOD-11 & 13-WECC-CRT-1
The implementation of MOD-032-1 includes the replacement of existing MOD-010-0, MOD-011-0,
MOD-012-0, MOD-013-1, MOD-014-0, and MOD-015.0.1. WECC developed MOD-11 & 13-WECC-CRT-1
to satisfy the fill-in-the-blanks requirements of MOD-011-0 and MOD-013-1. Upon retirement of MOD011-0 and MOD-013-1, MOD-11 & 13-WECC-CRT-1 will no longer be required but the intent of the
requirements needs to be captured in other documentation. The following is proposed for each
requirement and can be used for justification that a reliability gap will not be made with the retirement
of MOD-11 & 13-WECC-CRT-1:
WR1
Existing Language
The Reliability Assurer (WECC) shall verify the System Review Work Group (SRWG), or its successor,
develops and documents both comprehensive steady-state and comprehensive dynamic data
requirements, and reporting procedures for the Western Interconnection to meet the steady-state
data requirements listed in Attachment A (Steady State Data Requirements) and dynamic data
requirements list in Attached B (Dynamic Data Requirements) of this criterion.
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Proposal
Incorporate the existing requirement intent into the SRWG charter. Without a specific NERC standard
identifying the need, a WECC criterion requirement is not necessary to ensure SRWG will perform its
assigned tasks.
WR2
Existing Language
The Reliability Assurer (WECC) shall designate the SRWG, or its successor, as the entity responsible to
develop for the Western Interconnection any additional steady-state and dynamic data requirements
not otherwise specified by NERC
Proposal
Incorporate the existing requirement intent into the SRWG charter. The intent of WR2 was to have
SRWG develop and maintain the Data Preparation Manual. SRWG will continue to perform this task.
WR3
Existing Language
The Reliability Assurer (WECC) shall designate the Planning Coordination Committee, or its successor,
as the entity responsible to approve the development of both comprehensive steady-state and
comprehensive dynamic data requirements, and reporting procedures, within the Western
Interconnection, as developed by the SRWG, or its successor.
Proposal
Requirement WR3 can be retired in its entirety. The requirement intended PCC to approve the Data
Preparation Manual to improve the perception of due process in modifying data requirements which
would potentially impact the ability for applicable functional entities of MOD-010-1 and MOD-012-1 to
be compliant with the standards. It is proposed that the level of approval for the Data Preparation
Manual be lowered to the Technical Studies Subcommittee. The Data Preparation Manual should no
longer be considered a necessary means to be compliant with NERC standards but rather a procedure
for developing interconnection-wide cases. The TSS represents a sufficient level of expertise to ensure
interconnection-wide cases are developed as necessary to meet the needs of its members.
[Comment: Disagree with just TSS approvals because not all entities are represented in TSS. Keep
approvals at both TSS and PCC levels.]
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WR4
Existing Language
The Reliability Assurer (WECC) shall review this criterion, no less than each five years, by causing to be
filed a WECC Standards/Regional Criterion Request Form (or its successor), for the purpose of
reviewing the data requirements and reporting procedures addressed herein.
Proposal
Requirement WR4 can be retired in its entirety as there will be no criterion to review.
WR5
Existing Language
The Reliability Assurer (WECC) shall post on the WECC Web site each steady-state and dynamic data
request required by this criterion, to include, at a minimum, each of the following elements:
1)
2)
3)
4)
5)
A statement of the purpose for which the case will be developed
The case year
The case season
The case load, generation and interchange requirements
Required due dates for data submittal to the Reliability Assurer (WECC).
Proposal
The intent of WR5 is proposed to be incorporated into the SRWG Annual Study Program Scope of Work
document. Data requests from WECC for the development of a specific interconnection-wide case will
continue to require the minimum set of descriptions provided in the requirement. The process should
continue to include the use of the WECC web site.
WR6
Existing Language
The Reliability Assurer (WECC) shall post on the WECC Web site each steady-state and dynamic data
request, as referred to in WR5 above, at least eight weeks prior to the required due dates for data
submittal back to the Reliability Assurer (WECC).
Proposal
The intent of WR6 is proposed to be incorporated into the SRWG Annual Study Program Scope of Work
document in conjunction with WR5.
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WR7
Existing Language
Each Transmission Owner, Transmission Planner, Generator Owner and Resource Planner as specified
in the “Functional Entity” column of Attachment A of this criterion, shall submit to the Reliability
Assurer (WECC) the data specified in the “Data Required” column of Attachment A of this criterion, in
accordance with the due dates for data submittal to the Reliability Assurer (WECC) specified in WR5 above.
Proposal
MOD-032-1 requires Balancing Authorities, Generator Owners, Load Serving Entities, Resource
Planners, Transmission Owners, and Transmission Service Providers to provide modeling data to their
Transmission Planners and Planning Coordinators. Transmission Planners or Planning Coordinators can
submit modeling data to WECC. MOD-032-1, R4 also requires Planning Coordinators to make available
models for its planning area reflecting the collected data to the Electric Reliability Organization (ERO)
or its designee (assumed to be WECC) for development of interconnection-wide cases. Requirement
WR7 can be retired in its entirety.
WR8
Existing Language
Each Transmission Owner, Transmission Planner, Generator Owner, and Resource Planner as specified
in the “Functional Entity” column of Attachment B of this criterion, shall submit to the Reliability
Assurer (WECC) the data specified in the “Data Required” column of Attachment B of this criterion, in
accordance with the due dates for data submittal to the Reliability Assurer (WECC) specified in WR5 above.
Proposal
Requirement WR8 can be retired in its entirety. See WR7 above.
WR9
Existing Language
Each Generator Owner shall submit to the Reliability Assurer (WECC), the generator data required on
Attachments A and B in accordance with the following size-threshold criteria:

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If the individual generator unit capacity is 10 MVA or larger, and is connected to the WECC
transmission system at 60 kV or higher, then steady-state data shall be submitted for each
generator in accordance with the requirement stated at Attachment A, “NERC Requirement,
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MOD-11-0, R1.2”, and dynamics data shall be submitted for each generator in accordance with
all of Attachment B (excluding Attachment B, “NERC Requirement, MOD-13-1, R1.4.”).
If the aggregated generator unit capacity is 20 MVA or larger, and is connected to the WECC
transmission system at 60 kV or higher, and is not a collector–based generation facility, then
steady-state data shall be submitted for each individual generator in accordance with
Attachment A, “NERC Requirement, MOD-11-0, R1.2”, and dynamics data shall be submitted for
each generator in accordance with all of Attachment B, excluding Attachment B, “NERC
Requirement, MOD-13-1, R1.4.”. (Wind and solar farms are an example of a collector-based
generation facility.)
If the aggregated generation capacity is 20 MVA or larger, and is connected to the WECC
transmission system at 60 kV or higher, and is a collector–based generation facility, then
steady-state data shall be submitted in accordance with Attachment A, “NERC Requirement,
MOD-11-0, R1.2”, and dynamics data shall be submitted in accordance with all of Attachment B
(excluding Attachment B, “NERC Requirement, MOD-13-1, R1.4.”) for the aggregated
generation capacity as a single-unit generator model. (Wind and solar farms are an example of
a collector-based generation facility.)
All other generating facilities shall either be netted with bus load and steady-state data shall be
submitted in accordance with Attachment A, “NERC Requirement, MOD-11-0, R1.1b; or, steadystate data shall be submitted in accordance with Attachment A, “NERC Requirement R1.2”.
Proposal
The intent of WR9 is proposed to be moved to the Data Preparation Manual. The modeling
requirements for generators based on their capacity are still necessary. The thresholds should maintain
the existing 10 MVA and 20 MVA value.
WR10
Existing Language
Each Transmission Owner, Transmission Planner, Generator Owner and Resource Planner shall submit
steady-state data in accordance with Attachment A, and dynamic data in accordance with Attachment
B that is consistent with submitted steady-state data.
Proposal
The intent of WR10 is proposed to be moved to the Data Preparation Manual. The present modeling
practices at WECC utilize different datasets for steady state and dynamic data to represent the same
transmission system elements therefore presenting the potential for inconsistent data.
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WR11
Existing Language
The Reliability Assurer (WECC) shall post on the WECC Web site the approved solved and solvable
base-case data and supporting documentation.
Proposal
The intent of WR11 is proposed to be moved to the SRWG Study Program Procedure Scope of Work
document. The practice of making the interconnection-wide cases available through the WECC web
site will continue to be desired.
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Planning Coordinator Accounting
Presently, WECC interconnection-wide cases are modeled with the ability to aggregate data into Areas,
Zones, and Owners. Areas have historically represented a geographical aggregation of entities
transmission system models. Zones are used to further sub-divide Areas but a consistent application of
their use and purpose has not been established across WECC. Owners are intended to capture the
owner of the facility being represented. The use of bus number ranges has also historically been used
to aggregate data. The use of these data aggregation methods have been developed based on the
limitations of the modeling software used widely throughout WECC; PSLF and PSSE. The ability to
aggregate data to Planning Coordinators or Transmission Planners will help support applicable
functional entities complying with MOD-032-1. The use of each of the above aggregation fields is
considered in the following table: Comment: PC Area is not a defined term under NERC Glossary.
Field
General consideration of using each Field to represent PC
Worth further
consideration
Area
Area is used within the modeling software as the bases for balancing
interchanges. Interchange values are necessary to accurately represent desired
scenarios and may only be associated with Planning Coordinators by coincidence.
Areas should either continue to represent geographic regions or be modified to
more accurately capture scheduled and actual interchanges.
NO
Zone
The use of Zones may be used for specific processes within individual entities
planning processes but they do not represent useful information from an
interconnection-wide case perspective. Planning Coordinators could be allocated
Zone number ranges allowing for Planning Coordinator accounting and still
provide sufficient flexibility for entities to use Zones as desired.
NO
Owner
Using the Owner field to represent Planning Coordinators will eliminate the
ability to account for owner of the facilities represented in the cases.
NO
Bus
Number
The use of Bus Numbers for any type of aggregation is historical and represents
poor modeling practices when attempting to consolidate multiple transmission
system models, i.e. Westwide System Model and “Planning Cases.”
NO
New
Field
A new data field would accommodate the desire to account for Planning
Coordinators and Transmission Planners without modifying the existing model.
Adding fields has historically been very difficult due to lag time of software
vendors and lack of specificity from SRWG to the requirements of the field.
YES
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New Field – “Planning Coordinator”
SRWG will request modeling software vendors to provide a new data field to account for Planning
Coordinator through the Joint Users Group Subcommittee of TSS. The following specifications are
required:

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Mimic the functionality of the Zones field
Field should be added to all element type tables; bus, branch, generator, etc.
Capability to apply global filtering similar to Area, Zone and Owner
Revision History
Version
Version Date
0
January 21, 2015
Editor(s)
Revision Description
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April 24, 2015
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Create new document and addressed all comments
received from SRWG
TSS approved February 13, 2015
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Addressed comments from PCC
SRWG approved….????
John Gross
John Gross
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