By Amanda Durish Cook

MISO still has a handful of details to address before fully complying with FERC Order 845, the commission ruled last week.

FERC on Thursday directed the RTO to submit another compliance filing within 60 days to clear up its study process related to technological advancements, partial service requests and contingent facilities (ER19-1823-001, ER19-1960).

The commission issued Orders 845 and 845-A in 2018 and 2019, respectively, to increase the transparency and speed of generator interconnection processes. (See FERC Order Seeks to Reduce Time, Uncertainty on Interconnections.)

The commission found that MISO only partially complied with its directive that a customer be able to request interconnection service below its full generating facility capacity. It said the RTO omitted mandatory Tariff language showing that while interconnection service will be studied at the requested level, a project could be “subject to other studies at the full generating facility capacity to ensure safety and reliability of the system, with the study costs borne by the interconnection customer.”

FERC also directed MISO to explain why it gave itself 60 days to decide whether to conduct additional studies when an interconnection customer seeks to include technological advancements in its project prior to an interconnection facilities study agreement. The commission had previously prescribed 30 days to settle on any new studies and told MISO to either justify the two months or halve the timeline.

“While we understand that MISO has a large number of projects in its queue and a wide variation in studies that may be needed, we find that MISO has not justified its proposal to allow it 60 days from the date of receipt of additional information from an interconnection customer or merchant HVDC connection customer to conduct further studies,” the commission said.

Finally, MISO must include a fuller description of how it determines which projects in its annual Transmission Expansion Plan are “contingent facilities.” FERC Order 845 defines those facilities as a generation project’s unbuilt interconnection facilities and network upgrades that, if delayed or canceled, “could cause a need for restudies of the interconnection request or a reassessment of the interconnection facilities and/or network upgrades and/or costs and timing.”

Surplus Interconnection Proposal Just Fine

FERC found that MISO easily complied with a directive that RTOs establish an expedited queue process allowing interconnection customers to use or transfer surplus interconnection service at existing facilities.

MISO submitted a partial compliance filing in May to address the surplus interconnection directive. It proposed to rename its existing net zero interconnection option to “surplus interconnection service” and include interconnection and steady state analyses, while removing an existing competitive solicitation process for surplus interconnection service and clarifying that the original interconnection customer or affiliates have priority rights to any surplus service. (See Little Work Needed to Comply with Order 845, MISO Says.)