2011 Fortis BC Annual Progress Reports - WECC



February 5, 2009

Tom Green

Chair, WECC Technical Studies Subcommittee

Public Service Company of Colorado

1225 17th Street Suite 900

Denver, CO 80202-5599

Mr. Kent Bolton

WECC Technical Staff

Western Electricity Coordinating Council

615 Arapeen Utah, Suite 210

Salt Lake City, UT 84108

Waseem Arif

Trans. Planning Engineer

System Planning Dept.

FortisBC Inc.

#200-2076 Enterprise Way

Kelowna, British Columbia V1Y 6H7

Tel 250-469-8034

Fax 250-469-8124

waseem.arif@



Re: FortisBC – WECC 2009 Annual Progress Report

Please find attached the WECC 2009 Annual Progress Report submitted by FortisBC on system additions and changes. The changes are highlighted.

If you have any questions concerning this report, please contact me at (250) 469-8034.

Sincerely,

Waseem Arif

TSS Representative

WECC 2009 ANNUAL PROGRESS REPORT

FortisBC

Okanagan Transmission Reinforcement (OTR)

With the completion of Vaseux Lake Terminal the simultaneous (N-2) or sequential (N-1-1) loss of 72 Line and 74 Line between Vernon and Lee or BC Hydro 230 kV circuits 2L255 and 2L256 between Vernon and Ashton Creek will result in severe voltage drop in the City of Kelowna and overloading of both RGA transformers. To avoid this abnormal system condition a significant amount of Kelowna load will need to be shed. The BC Utilities Commission has recognized the criticality of the load supply to the City of Kelowna. In order to provide secure supply capability to the City of Kelowna the transmission system in the Okanagan will be reinforced. This project is an extension of the “South Okanagan Supply Reinforcement Project” completed in 2005 and has been previously studied in some detail as such. The CPCN (Certificate of Public Convenience and Necessity) application for the project was submitted before the BCUC (British Columbia Utilities Commission) on December 14th, 2007 and was approved on October 2nd 2008. The project is now in progress and the current completion date is November 2011.

The scope of work for this project includes the following:

• Upgrade of the existing Vaseux Lake Terminal from 500/161 kV to 500/230 kV operation. The existing transformers are capable of operation at 500/230 kV. Expand the 500 kV ring bus by installing one 500 kV circuit breaker and expand the 230 kV ring bus by installing two (2) 230 kV circuit breakers.

• Upgrade of the existing 161 kV transmission line 76L (Vaseux Lake Terminal-R.G. Anderson) to 230 kV operation, length 28 km..

• Second 230 kV circuit (75L) between Vaseux Lake Terminal and R.G. Anderson, length 28 km.

• Expand the existing 230 kV ring bus at R.G. Anderson Terminal by installing three (3) 230 kV circuit breakers. Install a new 168 MVA, 230/63 kV transformer, similar to the existing transformer T1.

• New 230 kV substation at Bentley near Oliver. The new Bentley Terminal will have one 230/63 kV 168 MVA transformer (the existing 168 MVA transformer T2 at R.G. Anderson will be moved to Bentley. This transformer currently operates at 161/63 kV but is also capable of operation at 230/63 kV), one 161/63 kV 150 MVA transformer and one 138/63 kV 100 MVA transformer.

• Conversion of the existing Oliver Terminal station from 161/138/63 kV transmission and distribution terminal to a 63/13 kV distribution station.

• Upgrade of the existing 161 kV transmission line 40L (Vaseux Lake Terminal-Oliver/Bentley) to 230 kV operation, length 11 km.

• F.A. Lee Terminal: install one (1) 138 kV circuit breaker and one (1) 30 MVAR capacitor bank.

• D.G. Bell Terminal: install one (1) 138 kV circuit breaker and one (1) 30 MVAR capacitor bank.

The in-service date for all these facilities is November 2011.

Simplified Single-line Diagram

A simplified single-line diagram that gives the FortisBC system in 2011 is attached. This diagram shows the system improvements with the “Okanagan Transmission Reinforcement Project”.

[pic]

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