Southwest Power Pool�moves to consolidated planning model aimed at shortening interconnection timelines

An Independence utilities presenter told the Public Utility Advisory Board on May 21 that the Southwest Power Pool's consolidated planning process (CPP) will put transmission and generation planning into a single regional model to reduce repeat restudies and speed answers for large interconnections.

The presenter said the legacy approach ran transmission and generation studies separately, which often triggered costly restudies when developers changed projects. "It really just takes all of those and it's putting into one big model at one time," the presenter said, adding that CPP seeks better long-range planning and more predictable interconnection points.

Why it matters: board members were told CPP aims to shorten the time for generator interconnection and related transmission work from multi-year queues to roughly 12 618 months, easing planning for utilities and large loads such as data centers. The presenter said the consolidated model should identify regional infrastructure solutions earlier and make cost allocation a central issue for implementation.

Details from the presentation included the driver behind the change: separate study queues had caused repeated restudies when projects were reduced or shifted, creating long delays and higher uncertainty for developers and utilities. The presenter cited the example of developers entering multiple generator projects into queue and later dropping some, triggering restudies that extended timelines.

The presenter also emphasized remaining work: CPP will require new regional models, agreement on where upgrades are needed, and a cost-allocation framework to decide who pays for regional upgrades. "The big thing is the time improvement," the presenter said, noting that market shifts over the multi-year study period can make earlier restudies obsolete.

Board members asked clarifying questions about timing and adoption. The presenter said CPP had been approved by an industry authority and expected phased implementation, with the potential for wider use later this year or next as models converge. No formal action was taken by the board at the meeting.

The presenter for this segment is listed in the meeting record as IPL staff.