PSE Attachment K Puget Sound Area Transmission Meeting

Transcription

1 PSE Attachment K Puget Sound Area Transmission Meeting Stephanie Lu, Engineer Transmission Contracts December 9, 2010

2 Content Attachment K Review Primary Contacts Economic Studies Process PSE Planning Process PSE Projects Update Sub-Regional Projects ColumbiaGrid

3 Attachment K: Transmission Planning Process Attachment K required as part of pro forma OATT - outlines PSE s transmission planning process Annual update of PSE s local and regional planning This meeting is intended to include local issues not raised in ColumbiaGrid or other regional planning forums

4 Primary Planning/Transmission Contacts George Marshall -- Director Electric Transmission John Phillips -- Manager Transmission Contracts Laura Hatfield -- Transmission Contracts Manager Jim Hogan -- Manager Total Energy System Planning Don Yuen -- Electric Distribution Planning Supervisor Kebede Jimma -- Lead Engineer Transmission Planning

5 Economic Studies Process Intended to address generation integration and transmission congestion Requests for studies should be submitted to Transmission Provider: see Part VII All requests/results will be posted on OASIS Requests received by Oct. 31 st will be responded to in the following calendar year Will be evaluated by public meeting within 3 months of receipt for input and investigation Non-local requests will be forwarded to ColumbiaGrid or WECC Transmission Expansion Planning Policy Committee for consideration

6 PSE Transmission Plan Development

7 Planning Methodology NERC/WECC Transmission Planning Assessments (TPL) Perform steady state power flow simulation of single contingencies, credible common mode outages, and various extreme outages Includes neighboring systems Perform selected assessment for voltage and angular stability Identify potential violations for further detailed study Review base case data and loading Typical concerns are thermal limitations on lines and post-transient voltage deviations Develop mitigation plans Include operational procedures, special protection schemes, or new construction TPLs audited by WECC in August 2010

8 Planning Assumptions Base Cases Northwest Loads Utilize peak load forecasts for 10 years out, updated annually Load forecasts for both winter and summer seasons Rely on input from customers for accurate forecasts Resources Model existing generating resources and projects with interconnection agreements Resources or demand response programs provided in annual customer data submittal Cases assembled through the WECC Annual Study Program

9 Current PSE Planning Considerations Load growth 2009/10 Winter Peak: 5156 MW 2010 Summer Peak: 3440 MW Limited short-term load growth due to economy Integrated Resource Plan Interconnection and Transmission Service Requests Generation dispatch variations Regional flowgates/cutplanes Input from Customers and Stakeholders

10 Current PSE Planning Activities Recently Completed Projects PSE Specific Areas North Puget Sound Area Central Puget Sound Area South Puget Sound Area Other Notable Projects

11 Recently Completed Significant Transmission Projects Novelty-Sammamish/Avondale 115 kv Line White River 230 & 115 kv Bus Improvement Poison Spring

12 North Puget Sound Area Transmission Projects Sedro Woolley 2 nd Transformer Sedro-Horse Ranch #2 230 kv Line Additional resources being proposed in U.S. and Canada Changing generation and industrial loads Addresses operational constraints (N-1) Need for 230/115 kv transformer capacity increase

13 Central Puget Sound Area Transmission Projects Sammamish-Lakeside-Talbot 230 kv Line Lake Tradition and/or Lakeside Transformers Need for 230/115 kv transformer capacity increase for growing load service and operational needs Increase transmission capacity

14 South Puget Sound Area Transmission Projects Alderton Transformer St Clair Transformer Local load growth Need for 230/115 kv transformer capacity increase

15 Other Notable Transmission Projects Sammamish 230 kv Bus Section Breaker Woodland-St. Clair 115 kv

16 Sub-Regional Projects - ColumbiaGrid ColumbiaGrid Areas of Focus for PSE Biennial Planning Area screening studies to address load growth and transmission path ratings Puget Sound Area Study Team (PSAST) Examples: Lakeside 230/115 kv transformation and conversion of Talbot-Lakeside-Sammamish 115 kv lines to 230 kv, second Portal Way 230/115 transformer Westside Northern Intertie operational nomograms Addressing operational constraints Northern Mid-C Study Team (NMCST) Impacts to PSE interconnection facilities at Rocky Reach and Wanapum Substations

17 Sub-Regional Projects - ColumbiaGrid (cont.) ColumbiaGrid Areas of Focus for PSE Wind Integration Study Team (WIST) Facilitate the integration of renewable generation in the Northwest Developing dynamic scheduling limits Cross Cascades Study Team Impacts to PSE generation and transmission across the West of Cascades North path Changes to regional generation dispatch with additional wind generation in Eastern Washington Growing Puget Sound load ColumbiaGrid facilitating scoping of multi-owner Open Season

18 Questions?

19 Feedback for Future Attachment K Meetings Goal: PSE wants to make the meetings relevant and beneficial to audience s needs What is the best format? Location Webex What are additional areas of concern we should cover in the future? stephanie.lu@pse.com with additional comments or suggestions for future meetings

20 Questions?