MISO’s Independent Market Monitor is condemning the modeling software MISO uses to plan its second long-range transmission portfolio.

After completing its initial economic and reliability analysis, MISO has found numerous overloads and congestion await its system if it doesn’t recommend a second long-range transmission plan portfolio.

MISO plans to handle four of the five recommendations from the Independent Market Monitor’s State of the Market report, putting on hold a recommendation regarding transmission planning.

MISO has awarded  an Ameren subsidiary the lead in building the second competitively bid project stemming from its $10 billion long-range transmission plan.

Doubts continue to swirl around which version of MISO’s future fleet mix is appropriate for long-range transmission planning — the Independent Market Monitor’s or the RTO’s itself.

Amid the Independent Market Monitor’s denunciation of MISO’s fleet assumptions for long-term transmission plans, lead planners defended their approach to planning for 2040.

MISO’s lead planners told the Board of Directors that more expensive annual Transmission Expansion Plans will become the norm, saying MTEP 23’s $9.4 billion package is a sign of future scattershot load growth in the footprint.

MISO’s Independent Market Monitor took his concerns to stakeholders over what he deems unrealistic fleet assumptions in MISO’s long-range transmission planning.

FERC approved LS Power’s request for rate incentives for the first competitive project surfacing from MISO’s long-range transmission plan.

MISO IMM David Patton appeared before the Market Subcommittee to again criticize the future resource mix assumptions MISO is using to craft a second long-range transmission plan.