how does nmms meet the nodal protocol requirements

11/08/2005 Ken Donohoo

How Does NMMS meet the Nodal Protocol Requirements

John Adams 3/23/2006


Agree on Meeting Objectives

• Reach consensus a modeling process with which ERCOT can meet the Nodal Protocol requirements– Pass audit which requires identical results for Operations and

planning model intended to represent the same system state (Protocol 3.10 ppg 5)

– Coordinate Operations Model with planning model (Protocol 3.10 ppg 9)

– Release planning model in CIM format (3.10.2 ppg 3)– Use dynamic ratings in Annual Planning Model, Network

Operations Model and CRR Network model (3.10.8)


Existing Process

Case building – Current process

Com

pare

Ope

ratio

ns

Cas

eP

lann

ing

Cas

e

Annual Planning

Case updates

(From TO’s)

Service Requests

ERCOT combine into single case

Review by TDSP‘s

Aprpoval

Compare

Planning Set A & Set B Power

flow cases

In Service Notificati

on

Case build/database

load

Operating Model (EMS)

Differences!


Proposed Process

Conceptual NMMS process

Ope

ratio

ns

Ca

seN

MM

SP

lann

ing

Cas

e

Service Request-Planning project

NMMS

Service Request – Operations

Project

Review for completenes

s and Consistancy

Planning Set A & Set B Power

flow cases

Operating Model (EMS)

Approval


Model Test SystemAccuracy andvalidation checks

Model Database● Tested Operations & Planning Projects● Network Operations Model● Planning Models● CRR Models

Projectapproved

to be placed inservice?

Day-aheadModel

FieldEnergizationNotification

Yes

MarketApplication

SoftwareData

OutageScheduler

Case Builder

ResourceRegistration /

GARF Information

Data submittals, Data request, Reports, Status

No

Revisedcontingencies

& one-lines

Internal DataEditor and

Comparisontool

Projectnot placedin-service.

Working DatabasePrepare andcheck Project

ModelBuilder

ERCOT TSP, Planning, andother authorized data submitters

Posting andNotification

TimelineDatabase

Study Case

CRR AuctionCase

PlanningCase

NetworkOperations

Model

Production Database

Day ahead

OtherApplication

Software


How NMMS meets requirements

3.10 Network Operations Modeling and Telemetry

(5) ERCOT shall use consistent information in the various models used by ERCOT Operations, ERCOT Planning, and other workgroups in a manner that yields consistent results. For operational and planning models that are intended to represent the same system state the results should be identical and the naming should be consistent. An independent audit must be performed at least annually to confirm that consistent information is used in all ERCOT Operations models.

By using the same source for the Annual Planning Model, for the Network Operations Model and CRR Network models, we guarantee model consistency



3.10 Network Operations Modeling and Telemetry

(9) ERCOT shall update the Network Operations Model under this Section and coordinate it with the Planning Models for consistency to the extent applicable.

By using the same source for the Annual Planning Model, for the Network Operations Model and CRR Network model, we guarantee model consistency


How NMMS meets requirements3.10.2 Annual Planning Model (1) ERCOT shall develop models for annual

planning purposes (“Annual Planning Models”) that contain, as much as practicable, information consistent with the Network Operations Model.

(2) ERCOT shall perform updates to the ERCOT Annual Planning Models for each of the next five years as follows:

(a) Annual Planning Model updates are due September 1st;

(b) Annual Planning Models are released October15th.

(3) ERCOT shall release of Critical Energy Infrastructure Information (CEII), the transmission make available to TSPs and/or DSPs and all appropriate Market Participants, consistent with applicable policies regarding model used in transmission planning. ERCOT shall provide model information through the use of the Electric Power Research Institute (EPRI) and NERC sponsored “Common Information Model” and web-based XML communications.

• The NMMS and associated business process meets the requirement that ERCOT develop models for annual planning purposes consistent with the Network Operations Model.

• Then NMMS provides a mechanism to make the transmission model used in transmission planning available to market participants through the EPRI and NERC sponsored Common Information Model.



3.10.8 Dynamic Ratings– ERCOT shall use

Dynamic Ratings, where available, in the Network Operations Model, Annual Planning Models, and the CRR Network Models.

The NMMS and associated business process provides a mechanism to use Dynamic Ratings in the Network Operations Model, Annual Planning Models, and the CRR Network Models.



3.10.8.4(2) ERCOT shall provide a

system to implement Dynamic Ratings and obtaining monthly expected ambient air temperatures to be applied to rating tables for the Annual Planning Models and the CRR Network Models. Transmission Elements that have Dynamic Ratings implemented in the Network Operations Model must have Dynamic Ratings in the Annual Planning Models and CRR Network Models.

The NMMS and associated business process provides a mechanism to apply rating tables for the Annual Planning Models.


How NMMS meets requirements8.3 TSP Performance Monitoring and Compliance(1) ERCOT shall develop a TAC-approved TSP

Monitoring Program to be included in the Operating Guides for TSPs. The metrics developed by ERCOT must include the following elements of transmission system planning, operations and maintenance:

(a) Transmission Element rating calculations;(b) Real-Time data:(i) Meeting telemetry standards, including the

installation of new measurement equipment and the accuracy of measurements;

(ii) Communications system availability; and(c) Outage scheduling and coordination; TSP

Outage planning and scheduling statistics must have less weight the further out these statistics are from the Planned Outage date;

(d) Compliance with model update requirements, including provision of network data in CIM compatible format and consistency with the Transmission Element naming convention developed in accordance under Section 3, Management Activities for the ERCOT system

The NMMS and associated business process provides a mechanism for accepting CIM compatible data, and enforcing compliance with the Transmission Element naming convention.

how does nmms meet the nodal protocol requirements

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