Minimum%20Transmission%20Design%20Standards%20for%20Competitive%20Upgrades.pdf

…to improve RFP process Approved by MOPC 7/14/2026, Revision 4 SPP Staff Revised to improve RFP processes and incorporate 765kV information. In consultation with Sargent & Lundy

…on 4 4 1 INTRODUCTION 1.1 APPLICABILITY A Request for Proposal (“RFP”) will be published for each Competitive Upgrade approved for construction by the SPP Board of Directors after January 1, 2015. Competitive Upgrades are subject to the…

…ard of Directors after January 1, 2015. Competitive Upgrades are subject to the Transmission Owner Selection Process (“TOSP”) set forth in Section III of Attachment Y of the SPP Open Access Transmission Tariff (“SPP Tariff”) and associated SPP Business Practices. When SPP issues an RFP for a Competitiv…

…t to the TOSP for Competitive Upgrades. If there is a conflict between the RFP and MTDS, the RFP will govern what the Respondent will use in its RFP Proposal. If there is a conflict between the RFP …

…espondent will use in its RFP Proposal. If there is a conflict between the RFP and the SPP Tariff or Business Practices, the SPP Tariff and Business Practices will govern. The MTDS represents the minimum design …

… loss of strength due to thermal aging. Table 2 - Phase Conductor Emergency Ratings Voltage (kV) Emergency Rating (Amps) 100 - 200 1,200 230 1,200 345 3,000 500 3,000 765 4,000 The conversion from conductor ampacity …

…irements. 2.6 RATING OF PHASE CONDUCTOR Facility ratings for transmission lines shall be established and maintained by the Transmission Owner in accordance with applicable NERC FAC-008 facility ratings methodology and applicable FERC requirements (including FERC Order 881 for ambient-adjusted ratings). Each transmission circuit shall have de…

…16 2.13 TRANSMISSION LINE TRANSPOSITION Lines ≥500 kV and longer than 25 miles shall include at least one complete transposition cycle unless documented power-flow, unbalance, and protection studies demonstrate that a non- transposed design meets SPP Planning Criteria and applicable TO standards.

…age Performance and Study Requirements: 1. Pre-contingency voltage limits, transmission bus voltages shall be maintained within 0.95–1.05 pu of nominal. 2. Post-contingency voltage limits, bus…

…hall meet the requirements of the NESC. To account for survey and construction tolerances, a minimum design margin of 2 feet shall be applied to ensure the NESC clearances are maintained after construction. This margin shall be applied to conduct…

…t currents will be provided in the RFP. Where a fiber communication path is required, the minimum number of fiber strands shall be 48 in each cable. Fiber may be either OPGW, underground f…

MINIMUM TRANSMISSION DESIGN STANDARDS FOR COMPETITIVE UPGRADES By Engineering Process Delivery 7/17/2026 Revision 4

…to improve RFP process Approved by MOPC 7/14/2026, Revision 4 SPP Staff Revised to improve RFP processes and incorporate 765kV information. In consultation with Sargent & Lundy

…on 4 4 1 INTRODUCTION 1.1 APPLICABILITY A Request for Proposal (“RFP”) will be published for each Competitive Upgrade approved for construction by the SPP Board of Directors after January 1, 2015. Competitive Upgrades are subject to the…

…ard of Directors after January 1, 2015. Competitive Upgrades are subject to the Transmission Owner Selection Process (“TOSP”) set forth in Section III of Attachment Y of the SPP Open Access Transmission Tariff (“SPP Tariff”) and associated SPP Business Practices. When SPP issues an RFP for a Competitiv…

…t to the TOSP for Competitive Upgrades. If there is a conflict between the RFP and MTDS, the RFP will govern what the Respondent will use in its RFP Proposal. If there is a conflict between the RFP and the SPP Tariff or Business Practices, the SPP Tariff and Business Practices will govern. The MTDS represents the minimum design …

…irements. 2.6 RATING OF PHASE CONDUCTOR Facility ratings for transmission lines shall be established and maintained by the Transmission Owner in accordance with applicable NERC FAC-008 facility ratings methodology and applicable FERC requirements (including FERC Order 881 for ambient-adjusted ratings). Each transmission circuit shall have de…

…hall meet the requirements of the NESC. To account for survey and construction tolerances, a minimum design margin of 2 feet shall be applied to ensure the NESC clearances are maintained after construction. This margin shall be applied to conduct…

…16 2.13 TRANSMISSION LINE TRANSPOSITION Lines ≥500 kV and longer than 25 miles shall include at least one complete transposition cycle unless documented power-flow, unbalance, and protection studies demonstrate that a non- transposed design meets SPP Planning Criteria and applicable TO standards.

…elding angle to it is greater than 30°. For high structures (for example, those with heights exceeding approximately 92 feet), reduced shielding angles of less than 30° shall be used, consistent with RUS Bulletin 1724E-200 (Design Manual for High Voltage Transmission Lines) and Good Utility Practice. Table 1 – Reduced Shielding Angle Value…

…t currents will be provided in the RFP. Where a fiber communication path is required, the minimum number of fiber strands shall be 48 in each cable. Fiber may be either OPGW, underground f…

…process Approved by MOPC 7/14/2026, Revision 4 SPP Staff Revised to improve RFP processes and incorporate 765kV information. In consultation with Sargent & Lundy …

…1 INTRODUCTION 1.1 APPLICABILITY A Request for Proposal (“RFP”) will be published for each Competitive Upgrade approved for construction by the SPP Board of Directors after January 1, 2015. Competitive Upgrades are subject to the Transmission Owner Selection Process (“TOSP”) set forth in Section III of Attachment Y of the SPP Open Access Transmission Tariff (“SPP Tariff”) and associated SPP Business Practices. When SPP issues an RFP for a Competitive Upgrade to solicit proposals from Qualified RFP Participants or (QRPs), as defined in Attachment Y of the SPP Tariff, (“Respondent”), these SPP Minimum Transmission Design Standards (“MTDS”) outline the minimum design standards to be used by the Respondent in its response to such RFP issued by SPP pursuant to the TOSP for Competitive Upgrades. If there is a conflict between the RFP and MTDS, the RFP will govern…

…Business Practices, the SPP Tariff and Business Practices will govern. The MTDS represents the minimum design standards by which a Competitive Upgrade shall be designed by the selected Designated Transmission Owner unless the project approved by the BOD and set forth in the RFP specifies different requirements than those provided in the MTDS. The MTDS facilitates the design of transmission…

…acceptable with SPP and NERC criteria). Table 3 - Typical Line Charging Values (MVAR/mile) Voltage (kV) Typical Line Charging (MVAR/mile) 230 0.40 – 0.60 345 0.80 – 1.00 500 1.60 – 2.00 765 4.00 – 5.00 Switching devices and configurations shall…