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MISO, SPP transmission study reveals 28 GW renewable energy potential

The MISO and SPP transmission study revealed seven sites that would enable more than 28 GW of renewable energy development.

“Go West, young man!” This phrase referring to the pioneering days of this country implied that the West was a land of opportunity. In the Midwest, the western part of the Midcontinent Independent System Operator (MISO) territory is rich with renewable energy resources, but interconnecting new renewable generation to the grid there has been stymied by a lack of transmission capacity.

As Natalie McIntire, Clean Grid Alliance’s technical consultant on MISO interconnection matters can attest, interconnecting new clean generators to the grid, “can be a challenging process.”  Studies are required to ensure that the grid remains reliable with the addition of the new power generating sources, and those studies often take years to complete.  In many cases, new generators are required to pay for new transmission lines, substations, or other infrastructure in order to ensure reliable interconnection.  What can make this even more challenging?  Trying to connect a generator in one transmission owner’s service territory next to a neighboring transmission owner’s territory.  In that case, there’s double the trouble. The new generator needs to be studied by both regions and may be required to fund additions to both grids, significantly increasing the cost and the time to get projects online.

MISO/SPP Seams Map JTIQ Study Reveals 7 Transmission Projects that can Open the Door for 28GW+ Renewables

The Joint Targeted Interconnection Queue study (JTIQ) took the long view when looking for transmission solutions.  It did not just consider the new generators that might come on in the next year or two, but instead modeled the expected new generation over a multiple-year period, likely representing the next 5 to 10 years.  This approach helps to identify more cost-effective solutions, as one larger solution can often cost less than multiple band-aid solutions.  MISO and SPP each modeled significant amounts of new generation near their boundary, considered a number of alternative solutions, including those submitted by stakeholders. The results show seven transmission projects in both service territories. The current analysis indicates at least 28GW or more of new generation could be supported while bringing a significant amount of economic and reliability benefits to consumers.

JTIQ Portfolio map showing 7 proposed transmission sites.

Next Up: Allocating Costs

Now that the solutions are identified, the real hard part begins. The two regions and their stakeholders need to work through the contentious task of figuring out how to assign the costs of these lines. After all, this is the root of the entire problem.  The Federal Energy Regulatory Commission (FERC) requires that costs be assigned in a manner that is “roughly commensurate” with the benefits the parties are expected to receive.  To do this, more analysis will be needed to better estimate the amount of new generation that will be supported by these lines, and the number of benefits both generators and load are expected to receive.  So far, MISO and SPP have only estimated the benefits load will receive from reduced energy production costs.

In addition to this study work, MISO and SPP also collaborated to implement some welcome changes to their interconnection processes that should result in shorter timelines and more certainty for new generators seeking to connect to the grid.

Clean Grid Alliance applauds this collaborative effort and will continue engaging with MISO, SPP, and other stakeholders, to pursue the next steps necessary to move these lines beyond the study report and toward construction. We look forward to the time when we can re-open the Western part of the MISO footprint to renewable energy generation once again.

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