Integrated Transmission Planning

The Integrated Transmission Planning process (ITP) is an iterative three-year process that includes 20-Year, 10-Year and Near-Term Assessments. The process seeks to target a reasonable balance between long-term transmission investments and congestion costs to customers. The ITP will create synergies by integrating three existing processes: the Extra High Voltage Overlay, the Balanced Portfolio and the SPP Transmission Expansion Plan Reliability Assessment. By integrating these processes, additional efficiencies are expected to be realized in the Generation Interconnection and Aggregate Transmission Services Request study processes. The ITP works in concert with SPP's existing subregional planning stakeholder process and will continue in parallel with the NERC TPL Reliability Standards compliance process.

ITP plans that are reviewed by the Markets and Operations Policy Committee and approved by the SPP Board of Directors will allow staff to issue Notification to Construct (NTC) letters for approved projects needed within the four-year financial commitment horizon. An Authorization to Plan (ATP) will be issued for projects needed beyond the four-year financial horizon. Once an NTC or ATP is issued, the project will be reviewed annually to ensure the continued need for the project and the required in-service date.

The ITP was approved by the SPP Board of Directors in October 2009 and approved by the Federal Energy Regulatory Commission in July 2010. Read SPP's FERC Filing.

ITP Near-Term Assessment

The annual ITP Near-Term Assessment (ITPNT) will evaluate SPP transmission system reliability in the near-term planning horizon. SPP will collaborate with stakeholders to develop appropriate mitigations plans to meet regional reliability needs and identify necessary reliability upgrades for approval and construction. The process also will coordinate transmission plans with the ITP20, ITP10, Aggregate Study and Generation Interconnection processes.

The ITPNT will create an effective near-term plan for the SPP footprint, which identifies potential problems for normal conditions (no contingency) and (N-1) scenarios using NERC Reliability Standards, SPP Criteria and local planning criteria.

ITP 10-Year Assessment

The ITP 10-Year Assessment (ITP10) is a value-based planning approach that analyzes the transmission system for a 10-year horizon. The assessment will identify 100kV and above solutions for issues identified on the 69 kV and above system, as well as issues identified by the ITP20 process appropriate for the ITP10 study. The ITP10 has narrower focus than the ITP20. Economic and reliability analyses will be utilized to help eliminate potential criteria violations, mitigate congestion, improve access to markets, improve interconnections and establish the timing of projects identified in the ITP20.

ITP 20-Year Assessment

The objective of the ITP 20-Year Assessment (ITP20) is to develop a recommended EHV backbone (345 kV and above) for a 20-year horizon. The design's success depends on its ability to provide a robust system that enables transmission usage and generation access. The assessment identifies a versatile transmission system capable of providing cost-effective energy delivery for a broad range of possible generation resource futures.

The ITP20 analysis consists of engineering models to facilitate development of long-range transmission plans, requiring input and review from ESWG, TWG, CAWG, SPC, RSC and MOPC.