With a whole lot of renewable initiatives sitting within the regional grid operator interconnection queue, builders ought to examine the quick observe course of at Midcontinent Independent System Operator (MISO) and Southwest Power Pool (SPP) for undertaking lower than 5 MW in capability. There are similarities and variations in each MISO and SPP quick observe processes. Both processes want research deposits and supply an preliminary overview with a buyer choices assembly. Even with a simple course of like quick observe, there are only a few MISO and SPP initiatives on this sub-5-MW class.


Large generator interconnection initiatives are sitting within the queue ready to be studied. If the MISO peak load is 127,000 MW, the whole MISO interconnection queue at the moment has 91,000 MW in several queue phases. The identical holds for SPP – SPP’s peak demand is 55,000 MW, and its interconnection queue has 85,000 MW of initiatives. Out of these 85 gigawatts (GWs), greater than 40% are photo voltaic initiatives.

For utility-scale renewable initiatives, it is sensible for ISO interconnection engineers to run feasibility, affect, and facility research individually. But for initiatives lower than or equal to five MW, transmission suppliers like MISO or SPP’s function is minimal. The main function is of the Transmission Owner (TO) or the distribution utility, because the case is likely to be. But the renewable developer should undergo the transmission supplier due to capability rights.

Going by means of the interconnection queue affords transmission entry for smaller renewable undertaking builders, who can then contract with the load-serving entities, to take part in power and capability markets.

There are three similarities in MISO and SPP Fast Track Process

Both MISO and SPP generator interconnection tariff part 14 discusses the quick observe course of containing four sub-sections – 1) Applicability, 2) Initial Review, three) Customer Options Meeting, and four) Supplemental Review. Once the renewable undertaking meets the eligibility standards, the preliminary overview seems to be on the detailed interconnection necessities, akin to, if the undertaking connects to a radial distribution circuit, then the undertaking shouldn’t trigger an extra of 15% of the road part annual peak load on the substation.

At each ISOs, the supplemental overview entails a minimal load display screen, voltage plus energy high quality display screen, and a security and reliability display screen.

Both MISO and SPP processes want deposit charges. At MISO, it’s $5000, and at SPP, it’s $1,000. Even with decrease deposit charges at SPP, SPP employees stated they don’t have any expertise processing quick observe initiatives. At MISO, there are solely 2 photo voltaic initiatives energetic within the queue with a capability of lower than 5 MW. There are a few diesel initiatives below “energetic” research standing within the MISO queue.

While the preliminary research deposit charges are much less at each ISOs, there could also be extra charges when the TO does supplemental overview. That depends on the interconnecting TO. It seems these charges could be negotiated throughout the buyer choices assembly.

There are three important variations

SPP applicability standards look like extra centered round voltage class. Projects lower than 5 kV and fewer than 500 kW are the primary class for quick observe eligibility. There are voltage class classes akin to lower than 15 kV, 30 kV, and 69 kV within the SPP course of. SPP explicitly states that any undertaking connecting to transmission strains better than 69 kV wouldn’t qualify for the quick observe course of. But MISO course of solely discusses 5 MW as the brink for quick observe course of applicability.

Another distinction in MISO and SPP markets is that MISO has a Planning Reserve Auction (PRA) the place investor-owned utilities can level to small renewable initiatives and tackle their reserve margin necessities. At the final MISO public sale, 850 MW of photo voltaic cleared MISO capability public sale. Moreover, MISO has Federal Energy Regulatory Commission (FERC) approval to deal with photo voltaic like a dispatchable useful resource (like wind and different fuels). This approval means photo voltaic models ought to submit their manufacturing forecasts to the MISO operator, however there is no such thing as a…

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