8.4 Southeastern Regional Transmission Planning

8.4 Southeastern Regional Transmission Planning

The SERTP process consists of the following FERC-jurisdictional sponsors:

  • Duke Energy (Duke Energy Carolinas LLC and Duke Energy Progress Inc.)
  • Louisville Gas and Electric Co. and Kentucky Utilities Co. (LG&E/KU)
  • Ohio Valley Electric Corp. (OVEC), including its wholly owned subsidiary Indiana-Kentucky Electric Corp.
  • Southern Co. Services Inc. (Southern)
  • Dalton Utilities
  • Georgia Transmission Corp. (GTC)
  • Municipal Electric Authority of Georgia (MEAG)
  • PowerSouth
  • Associated Electric Cooperative Inc. (AECI)
  • Tennessee Valley Authority (TVA)

Throughout 2015, MISO and SERTP collaborated on meeting the directives from the January 23, 2015, FERC Order related to FERC Order 1000 interregional transmission planning. Additionally, Section X of MISO’s Attachment FF describes the coordination procedures for interregional transmission coordination with SERTP. This collaboration and the work completed to date are described in more detail below.

FERC Order 1000

On January 23, 2015, FERC conditionally accepted the MISO-SERTP FERC Order 1000 interregional transmission planning compliance filing, subject to further compliance filing. MISO and the SERTP companies requested and were granted a 90-day extension to June 22, 2015. MISO and the SERTP parties collaborated and came to agreement on tariff language to address the FERC directives, which was circulated to MISO and SERTP stakeholders. For cost allocation, MISO and SERTP will use an avoided cost methodology that accounts for reliability, economic and public policy benefits. On June 22, 2015, MISO and SERTP filed their compliance filings to FERC, which included redlined and clean tariff versions of Attachment FF as well as transmittal letters from both regions.

Interregional Coordination

MISO and SERTP have tariff requirements requiring interregional transmission coordination as described in Section X of Attachment FF of MISO’s Tariff. This includes a meeting at least once per year to facilitate interregional coordination procedures although meetings may occur more frequent.

At least annually, MISO and the SERTP will exchange their most current regional transmission plans including power-flow models and associated data used in the regional transmission planning processes. This exchange typically occurs during the first calendar quarter of each year. Additional transmission-based models and data may be exchanged between the SERTP and MISO as necessary and if requested. The data will be posted on the pertinent regional transmission planning process’ websites, consistent with the posting requirements of the respective regional transmission planning processes, and subject to the applicable treatment of confidential data and Critical Energy Infrastructure Information (CEII).

At least biennially, MISO and the SERTP will meet to review the respective regional transmission plans. Such plans include each region’s transmission needs as prescribed by each region’s planning process. This review will occur on a mutually agreeable timetable, taking into account each region’s regional transmission planning process timeline. If, through this review, MISO and the SERTP identify a potential interregional transmission project that may be more efficient or cost-effective than regional transmission projects, the Transmission Provider and the SERTP will jointly evaluate the potential interregional transmission project pursuant to Section X.C.4 of Attachment FF of MISO’s Tariff.

In 2015, MISO and the SERTP sponsors met on several occasions. The first meeting was a conference call on January 22, 2015, where MISO and SERTP reviewed each other’s regional processes and timelines. MISO and SERTP exchanged ideas on how data can and will be shared between the regions for interregional coordination. In the latter part of 2015, once NDA/CEII’s are in place, data exchange will occur. The data used for the purposes of interregional coordination will be posted to each of the respective regional transmission planning process websites.

In early 2016, MISO and the SERTP companies will meet to discuss each other’s regional transmission plans to determine if there may be interregional transmission projects that are more cost-effective or efficient than regional projects. If potential interregional transmission projects are identified through the review of the regional transmission plans, MISO and SERTP will jointly evaluate those projects pursuant to the processes outlined in Section X.C.4 of Attachment FF of MISO’s Tariff.