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Studies and Reports > 2009 MN Biennial Report > NE Planning Zone > Needs: 6.3.17 Brainerd Lakes – Remer – Deer River Area

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Transmission Projects Report 2009
Section 6.3: Northeast Zone
p. 119

6.3.17 Brainerd Lakes – Remer – Deer River Area

Tracking Number: 2009-NE-N4

Utility: Great River Energy

Inadequacy. The 69 kV system between the Pequot Lakes, Riverton, Birch Lake, and Deer River substations is becoming susceptible to contingent low system voltages.

A map of the area is shown on the following page.

Alternatives. A new source into the 69 kV system is needed and the 2008 GRE Long-Range Plan indicated that a new connection to the Blind Lake 69 kV Substation was the best option at this time. The alternatives examined for supplying the Blind Lake Substation involved tapping either the MP Blackberry-Riverton 230 kV line or the Grand Rapids-Riverton 115 kV line and providing a 115 kV or 69 kV line to the Blind Lake Substation.

Analysis. Various tap configurations along the 115 kV and 230 kV systems have been examined as supply options to the Blind Lake substation. The 115 kV system is capacity limited and offers inferior voltage support as compared to the 230 kV system. The 230 kV system offered adequate voltage support and would provide opportunity to expand and enhance the area 115 kV system. A Macville-Blind Lake 115 kV line with a Blind Lake 115/69 kV transformer is desired over a 69 kV line as the voltage support and line losses are less than what a Macville-Blind Lake 69 kV line can offer.

Schedule. GRE will have to monitor the load growth in the area to determine the need for the source. A Certificate of Need and a Route Permit would be required for the 115 kV line construction. GRE would likely submit a CON Application and a Route Permit Application sometime between 2011 and 2014.


Transmission Projects Report 2009
Section 6.3: Northeast Zone
p. 120

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