Report of the Planning Coordination Committee

WECC Board Meeting

San Diego, CA

April, 2009

2

PCC Agenda

Approval Items PCC Chair and Vice-Chair 2008 WECC Study Program Annual Report

Information Items Facility Rating Process Common Corridor

3

Proposed Motion

PCC recommends that the Board approve the following appointments to begin following the April 2009 Board meeting: Planning Coordinating Committee Chair: Dana

Cabbell, SCE Planning Coordinating Committee Vice-Chair:

Scott Waples, Avista

4

2007 WECC Study Program

The Study Program Annual Report is prepared each year to assess the reliability of the Western Interconnection.

One disturbance simulation failed to meet the limits specified in the “WECC Disturbance-Performance Table of Allowable Effects On Other Systems” by deviating from the post-transient voltage and/or the transient frequency criteria.

Three more disturbances did not meet the performance shown in that table, but the deviations were limited to the system where the disturbance occurs.

The Report was unanimously approved by PCC

5

Study Emphasis

6

Proposed Motion

PCC recommends that the Board approve the 2008 WECC Study Program Annual Report.

7

Information Items

8

Facility Rating Process

Projects in Regional Planning JDF #2 Triton South TANC Transmission Program Hemingway – Capt. Jack Canada – N. Cal Can – N. Cal Devils Gap Walla Walla – McNary

9

Facility Rating Process (cont’d)

Projects Entering Phase 1 (none)

Projects Entering Phase 2 Gateway South Gateway West Northern Lights Canada - N. California Hemingway - Boardman

Projects Entering Phase 3 Populus – Terminal Midpoint – Summer Lake

10

Common Corridor Criteria

WECC has a Regional Criteria that requires acceptable performance for simultaneous outage of adjacent circuits on a common corridor.

NERC criteria are less stringent, requiring acceptable performance for outage of a single circuit, after which system adjustment is allowed and then an outage on an adjacent circuit.

NERC Standards are not consistent. As we site new transmission in the West, land-use agencies and citizens

are asking why WECC has a more stringent criteria which can lead to corridor separation of 1000 feet to several miles.

Changes to the criteria will require forming a Standards Drafting Team and justification to NERC and FERC why WECC is proposing to modify the WECC Regional Criteria to more closely match the NERC Standard.

The Reliability Subcommittee is preparing a White Paper to outline the issues and address the options