Clean energy organizations are prodding MISO to contemplate prospective load and generation simultaneously, with Clean Grid Alliance asking MISO to coordinate its annual transmission studies with its interconnection queue studies.
CGA said doing so would allow the grid operator to better accommodate new large load additions.
Speaking at a Dec. 4 Planning Subcommittee teleconference, CGA’s Rhonda Peters said MISO should adopt a policy of sharing new large load data from transmission planning in interconnection studies and conversely, including signed generator interconnection agreements (GIAs) into the year’s current Transmission Expansion Plan (MTEP) studies.
Peters said if MISO cross-shares data, some generation and nearby large loads can be paired up, negating the need for some extensive network upgrades on the transmission system.
“Large loads can utilize new generation directly or locally, removing the need for longer or large transmission line network upgrades to move new generation to traditional load centers,” she explained.
Peters said though the definitive planning phase studies of MISO’s queue start with the latest MTEP modeling and list of new transmission projects at the time, that snapshot quickly becomes outdated, as getting through the queue can take up to five years and MISO doesn’t periodically update models. MTEP, on the other hand, works from an annually updated model that includes large load additions that have been accepted as a reality, with MISO racking up a fresh transmission portfolio every year.
Peters said that to execute a data-sharing practice, MISO could simply add a check for a “load expansion project” into its business practice manuals describing interconnection studies. MISO’s manuals already stipulate that planners should check the most recent MTEP projects during the study process to figure out if a constraint is set to be mitigated by a transmission project that was approved while a generation project was advancing through queue studies.
On the MTEP side of the coin, Peters said MISO today allows only fully executed GIAs into its MTEP modeling. However, she said “a generator nearing completion of a GIA may mitigate the need for costly transmission to add new large load.”
MISO could consider letting a large load customer link up with a generator still in the queue by striking an agreement with the generation developer and providing a surety worth 25% of the proposed generator’s construction costs, Peters suggested. She said that way, generation is likely to be built.
“MISO has not yet been receptive to policy mechanisms that would pair large load and generation projects while each [is] going through their respective processes,” Peters added.
Peters said the added considerations can help MISO tackle the unprecedented load growth it’s set to encounter.
“Certainly we’ve heard from the states that they’re worried about these large load additions,” Peters said, noting that thermal generation takes a few years to construct after an up-to-five-year interconnection queue wait.
“We just can’t respond that quickly to some of these rapid load additions,” Peters said. “If a load and generator can come together, they can basically net out and help themselves.”
Peters acknowledged that CGA’s appeal is similar to NextEra Energy’s recent request that MISO create a dedicated study and registration process for new generation contingent on large loads. (See “NextEra Makes 2nd Overture for Bundled Studies,” MISO Previews Future Projects to Improve System Planning.)
But Peters said NextEra asked MISO to consider only already matched-up load and generation. She said CGA is asking MISO to consider “even circumstances where there’s no affiliation between the generator and the load, but they’re willing to become affiliated.”
MISO Senior Manager of Resource Utilization Kyle Trotter said at first blush, MISO is hesitant to make any process dependent on large loads, which could wind up not being realities on the system.
“It’s one thing to have a project dependent on a network upgrade. It’s another thing to have a project contingent on a large load that may not materialize,” Trotter said.
“The generator interconnection takes five years, while load additions take 1.5 years, creating a fatal flaw in concurrent coordination of the respective models and processes. This leads to inaccuracies and inefficiencies in both processes that prevent viable project development and impose a significant, obstruction in the MISO market,” Clean Grid Alliance’s David Sapper said at an August Market Subcommittee meeting. “This is not hyperbole; this is serious stuff.”
Sapper said from his “economist, lizard brain,” MISO could get a jump on preparing for massive loads down the road and make constructive use of its overflowing interconnection queue, which it currently insists is too large.
During the Dec. 4 Planning Subcommittee, WPPI Energy’s Steve Leovy asked that MISO develop a formal response to CGA’s request.
Trotter said MISO plans to return to an upcoming Planning Subcommittee to give its official perspective on the request.