The Midwest Independent Transmission System Operator staff has recommended a portfolio of multi-value projects for the MISO board to approve and include in its transmission expansion planning initiative, MTEP 11.
The recommended portfolio includes the Brookings project, the Michigan Thumb Loop project and 15 additional multi-value projects (MVPs) that will cost a total of $5.2bn in 2011 dollars.
The costs of the MVPs will have a uniform 100% regional allocation and will be recovered from customers through a monthly energy usage charge, MISO staff said.
MISO claimed the proposed portfolio will provide benefits in excess of its costs under all scenarios studied, maintain system reliability and enable wind energy into the system to meet renewable energy standards. The portfolio will also provide an average annual value of $1.3bn over the first 40 years of service, at an average annual revenue requirement of $624m.
“The 2011 MVP portfolio analysis was based on the need to economically and reliably help states meet their public policy needs,” MISO staff said in the analysis.
The study identified a regional transmission portfolio that will enable the MISO load serving entities to meet their renewable portfolio standards.
“While the study focused upon the RPS requirements, the transmission portfolio will ultimately have widespread benefits beyond the delivery of wind and other renewable energy,” MISO staff said. “It will enhance system reliability and efficiency under a variety of different generation build outs. It will also open markets to competition, reducing congestion and spreading the benefits of low cost generation across the MISO footprint.”
MISO began investigating the transmission required to integrate wind in 2002. The analyses continued through subsequent MTEP cycles, with exploratory and energy market analyses. As the demand for renewable energy grew, driven largely by an increasing level of renewable energy mandates or goals, additional regional studies were conducted to determine the transmission necessary to support these policy objectives. These studies included the Joint and Coordinated System Plan (JCSP), the Regional Generation Outlet Studies (RGOS), and analyses by the Organization of MISO States (OMS) Cost Allocation and Regional Planning (CARP) group.
MISO staff provided justifications for the projects it recommended. For the full report, click here.
The Big Stone to Brookings County 345-kV line reliably moves mandated renewable energy from the Dakotas to major 345-kV transmission hubs and load centers, MISO staff said.
“It removes overloads on the 230-kV paths from Big Stone to Blair and Hankinson to Wahpeton, along with 115-kV paths from Johnson to Morris, Big Stone to Highway 12 to Ortonville, Pipestone to Buffalo Ridge and Canby to Granite Falls. The overloaded Watertown 345/230-kV is also alleviated.”
Without the Brookings County to Southeast Twin Cities 345-kV line, the loss of Split Rock to White 345-kV leaves only the 230-kV system to feed load to the East, MISO staff said.
“Not having the project also affects the 115-kV network in southern Minnesota which is connected on both sides by 230-kV. The loss of either 230-kV source causes multiple overloads in the surrounding 115-kV network without this project,” MISO staff said.
The Lakefield Junction to Winnebago to Winnco to Burt area; Sheldon to Burt area to Webster 345-kV path through southern Minnesota and northern Iowa effectively mitigates the Fox Lake – Rutland – Winnebago 161-kV constraint, MISO staff said.
“The project reliably moves mandated renewable energy from western and northern Iowa along with existing wind at the Winnebago, Wisdom and Lime Creek/Emery areas to major 345-kV transmission hubs.”
The Winco to Lime Creek to Emery to Blackhawk to Hazelton 345-kV path through Iowa mitigates constraints seen on the Lime Creek – Emery – Floyd – Bremer – Blackhawk 161-kV line, MISO staff said.
This project “reliably moves mandated renewable energy from western and northern Iowa along with existing wind at the Winnebago, Wisdom and Lime Creek/Emery areas to major 345-kV transmission hubs.”
The North LaCrosse to North Madison to Cardinal 345-kV line creates a tie between the 345-kV network in western Wisconsin to the 345-kV network in southeastern Wisconsin, MISO staff said.
“This creates an additional wind outlet path across the state; pushing power into southern Wisconsin, where it can go east into Milwaukee, or south to Illinois, providing access to less expensive wind power in two major load centers.”
The 345-kV Dubuque to Spring Green to Cardinal line creates a tie between the 345-kV network in Iowa to the 345-kV network in southeastern Wisconsin.
“This expansion creates an additional wind outlet path across the state, bringing power from Iowa into southern Wisconsin, where it can then go east into Milwaukee or south toward Chicago providing access to less expensive wind power in two major load centers,” MISO staff said.
The Ellendale to Big Stone 345-kV line removes overloads on the 230-kV path from Ellendale to Oakes to Forman and the 115-kV path from Ellendale to Aberdeen, MISO staff said. The project “reliably moves mandated renewable energy from the Dakotas to major 345-kV transmission hubs and load centers.”
The Ottumwa to Adair to Palmyra Tap 345-kV lines will provide an outlet for wind generation in the western region to move toward the more densely populated load centers to the east, MISO staff said.
“In addition to providing a wind outlet, the new lines will provide reliability benefits by mitigating a number of contingent outage events during peak and shoulder periods, where the wind generation component is much higher.”
The 345-kV Palmyra Tap to Quincy to Meredosia to Pawnee, and Meredosia to Ipava lines will provide an outlet for wind generation in the western region to move toward the more densely populated load centers to the east, MISO staff said.
The 345-kV Pawnee to Pana to Mt. Zion to Kansas to Sugar Creek 345-kV lines in western Indiana will provide an outlet for wind generation in the western region to move toward the more densely populated load centers to the east, MISO staff said.
The Reynolds to Burr Oak to Hiple 345-kV line will create a 345-kV path across the northern portion of Indiana toward Michigan, with the new tie at Hiple connecting an existing 345-kV line to the Argenta Station in southern Michigan, MISO staff said. This path will provide an additional 345-kV path to move wind energy across Indiana, and closer to the east coast, bringing less expensive wind generation into areas where the expense to generate power can be considerably greater.
The Michigan Thumb Loop Expansion was needed pursuant to the directives of the Michigan Public Service Commission and the final report of the Michigan Wind Energy Resource Zone Board.
“This project is necessary to deliver wind mandate in Region 4, the primary wind zone region in Michigan (the Thumb).”
The Reynolds to Greentown 765-kV line across central Indiana will create an additional wind outlet path across the state, pushing power closer to the east coast, bringing less expensive wind generation into areas where the generation of power can be considerably more expensive.
The Pleasant Prairie to Zion Energy Center 345-kV line creates an additional 345-kV tie between these two stations, allowing more power to flow from the north down into Illinois, MISO staff said.
“From a reliability perspective, the addition of the path relieves constraints on the 138-kV system adjacent to the project as well as 138-kV system constraints to the west of the new line.”
The Oak Grove to Galesburg to Fargo 345-kV line creates a path from western Illinois near the Iowa/Illinois border to central Illinois. This expansion creates an additional wind outlet path across the state, pushing power into central Illinois.
In combination with the Dubuque – Spring Green – Cardinal 345-kV line, this enables 1,100 MW of wind power transfer capability.
The Sidney to Rising 345-kV line in Illinois will connect a gap in the 345-kV network in the area, promoting wind generation moving from the west to the east into Indiana. “It will mitigate constraints by keeping the power on the 345-kV system, rather than pushing it into the 138-kV network at Rising,” MISO staff said.