American Transmission Co.

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Connections to the grid

The transmission system provides a pathway for power among interconnected power producers, or generators, and distribution companies, or load. ATC desires to actively coordinates with MISO and the interconnected entity to develop and implement both new interconnections and modifications to those already existing.

Generator Interconnections

MISO administers all interconnections of new generation directly to the ATC Transmission System. The ATC Generating Facility Interconnection Guide (updated on 12/16/15) supplements MISO’s requirements and describes ATC’s minimum requirements for the connection of such generation.

While MISO’s Tariff generator interconnection process may not specifically apply to modifications made to existing generators or associated interconnections, ATC requests that generator owners communicate to ATC for review of proposed modifications that are reasonably anticipated to impact the ATC transmission system by completing and attaching the linked form in an email to GIOANotices@atcllc.com.

To communicate a planned change to a generating unit please complete the following form, save, and submit to the email address above. Feel free to include any pertinent documentation that will assist ATC in the evaluation of the proposed modifications.

Generating Facilities Modification Notification

Transmission Interconnections

The ATC Transmission Interconnection Guide (updated on 12/7/15) supplements MISO Business Practices for transmission interconnections, describing ATC’s role along with specific guidance for design, construction and operational aspects of a transmission interconnection project.

ATC requests that neighboring transmission owners communicate to ATC for review of proposed new interconnections or modifications to existing interconnections that are reasonably anticipated to impact the ATC transmission system by completing and attaching the linked form in an email to T-DLIRFS@atcllc.com.

Transmission Interconnection Request Form (TIRF) (updated on 01/01/16)

Load Interconnections

ATC Load Interconnection Guide (updated on 12/16/15) describes ATC’s minimum requirements and process for the connection of load to ATC’s transmission system.

ATC requests that distribution companies communicate to ATC for review of proposed new interconnections or modifications to existing interconnections that are reasonably anticipated to impact the ATC transmission system by completing and attaching the linked form in an email to T-DLIRFS@atcllc.com.

To request a new load interconnection or a modification to an existing load interconnection, complete the following form, save, and submit to the email address above.

Load Interconnection Request Form (LIRF)  (updated on 01/01/16)

Queue

Project Commitment Agreement (updated on 05/27/15)

Joint Best Value Planning White Paper (updated on 1/18/16)

ATC Generator Modeling Decision Methodology

Asset Modification Form


Operations Communications

Completed forms should be emailed to atcoutages@atcllc.com for review.

  • FM- 9130 Interconnected Entity (IE) Equipment Testing Notification Form
    • IEs should complete this form whenever they plan to test equipment in the following types of substations:
      • All substations where generation is connected to the transmission system.
      • All distribution substation with protection schemes that trip ATC-owned circuit breakers, circuit switchers or lockout relays, or distribution substations that have equipment connected to ATC-owned bus differential schemes.
  • Generator Testing Request Form
    • IEs should complete this form such that reactive power testing can be coordinated between ATC and interconnected generating facilities.
  • FM-9120- Protective Relay, RTU, or Communication Channel Testing Request Form  (for IEs without TOA access)
    • IEs should complete this form whenever they plan to disable or remove from service an IE-owned protection scheme that provides protection of ATC-owned equipment.
  •  Outage Request Form and Instructions (for IEs without TOA access)
    • IEs should complete this form whenever they need clearance on ATC-owned equipment.
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