Open Access Technology International, Inc. WECC Interchange Tool (WIT) Overview for WECC Board of Directors December 7, 2007 Your Energy, Our Solutions

Open Access Technology International, Inc.

WECC Interchange Tool (WIT) Overview

for

WECC Board of DirectorsDecember 7, 2007

“Your Energy, Our Solutions”Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.


Trade Secret

This document and attachments contain confidential and proprietary information of Open Access Technology International, Inc. This information is not to be used, disseminated, distributed, or otherwise transferred without the expressed written permission of Open Access Technology International, Inc.

Proprietary Notice

All OATI products and services listed are trademarks and service marks of Open Access Technology International, Inc. All rights reserved.

WIT Project Overview

The WECC Interchange Tool (WIT) is a WECC solution providing Interchange Authority (IA) functions for the Western Interconnection. The Project is divided into three phases for implementationPhase I:– Single E-Tag authority for WECC– Enhanced E-Tag validation for WECC– WECC Registry based on NERC TSIN SRD– E-Tag based Balancing Authority (BA) Net Scheduled

Interchange (NSI) calculations and reports– EIDE API– Production Cutover January 24, 2007


WIT Project Overview

Phase II:–BA Net Actual Interchange (NAI)–BA Inadvertent Interchange (II) calculation–Provide NERC II reporting–Production Cutover October 17, 2007Phase III:–Ramped NSI minute values for BA’s AGC–Estimated Completion February 2008

All Phases have met specification requirements on time and on budget.


WIT System Overview


WIT

Sys

tem

WECC Registry

TSIN Registry

OATI Tagging System

WIT EIDE System

WIT Interface

WECC BAs

Tags

Data Exc

hange

WECCValidations

InterchangeSchedules

WECC Registry •Adjacency Definitions•Approval and Notifications

OATI Tagging•WECC Tag Authority Service•Frontend Tag Validations before creation

WIT Interface•Tag based Schedules•Net Checkouts•Reporting

WIT EIDE•PutMeter•PutSchedule•GetSchedule

Includes:•Production Systems•Development Systems•Hot-Standby System•Disaster Recovery System

WIT– Interchange Summary

Adjacent Nets (Schedule & Actual) , GCA/LCA Nets, Path Nets


WIT Performance to DateWIT Contract 1.7.4 No Single Point of Failure– The WIT system must be fully redundant, including at least dual

internet connections using separate providers. The WIT system must be configured in either a parallel or hot standby configuration unless otherwise mutually agreed upon between WECC and OATI

WIT Contract 1.10.6 Availability– WIT availability will be 99.0% measured over a rolling 30-day period.

The 99.0% availability requirement will apply only to WIT elements that are not part of OATI’s Authority Service. The Authority Service will comply with NERC availability requirements for Authority functions

NERC E-Tag Specification– 99.5% availability per WEQ-004

WECC Registry, WIT and OATI Tag Authority Service all far exceed these minimum requirements.

640 System Users


WIT – Schedule Creation

WIT Daily Schedule Creation

0

5000

10000

15000

20000

Jan-

07Fe

b-07

Mar

-07

Apr

-07

May

-07

Jun-

07

Jul-0

7A

ug-0

7S

ep-0

7O

ct-0

7N

ov-0

7

# o

f S

ch

ed

ule

s


WIT – Tie Data Upload


Daily Tie Data Updates

20002500300035004000450050005500

17-O

ct

24-O

ct

31-O

ct

7-N

ov

14-N

ov

21-N

ov

28-N

ov

# o

f T

ie V

alu

es

WIT Project – BA Tie-Data Transfer StatusAs of 12-04-07:

Providing Production Data– GCPD – Production up and running now– LDWP – Production up and running now– NWMT – Production up and running now– PGE – Production up and running now– PSCO – Production up and running now– SCL – Production up and running now– BCTC – Production up and running now– AVA – Production up and running now– AESO – Production up and running now– CHPD – Production up and running now– IID – Production up and running now– SRP – Production up and running now– SPPC – Production up and running now– NEVP – Production up and running now– WALC – Production up and running now– PNM – Production up and running now– AZPS – Production up and running now– TEPC – Production up and running now– EPE – Production up and running now– IPCO – Production up and running now– BPAT – Production up and running now– PACE – Production up and running now


– PACW – Production up and running now– DEAA/GRMA/HGMA – Production up and

running now. (Only Providing Data Once a Day - needs to be hourly)

– TIDC – Working on implementation. (Manually uploading data currently - hourly)

– DOPD – Production up and running now

– SMUD – Production up and running now

– WACM – Production up and running now

– CISO – Working on implementation (Manually uploading data currently - once a day)

– CFE – Production up and running now

– PSEI – Production up and running now

Not Providing Data– TWPR – Working on implementation

– WAUW – Working on implementation

WECC Registry – Adjacency Summary


WECC Registry Statistics


Adjacency Definitions

16500

2501300 1300

0

2000

4000

6000

800010000

12000

14000

16000

18000

Path BA Source Sink

WIT Project – Future Enhancement Ideas1. Unified WECC Time Error Correction Calculation

2. WECC Reserve Requirement Calculator

3. Provide “Real-time” Nets for System Security Analysis

4. WECC Path OTC Management and Monitoring

5. Additional Tag Validations• Explicit Path Adjacency


WIT Project Contacts

WECC Point of Contact

– Eric Langhorst (WECC)ESWG Project Team (Phase II)

– Mark Hackney, for general questions (AZPS)

– Jim Hansen, for EIDE questions (SCL)OATI Contact

– Mark Nielson, for technical questions (OATI)



Questions?

“Your Energy, Our Solutions”Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

Documents

Open Access Technology International, Inc. WECC Interchange Tool (WIT) Overview for WECC Board of Directors December 7, 2007 Your Energy, Our Solutions