2017 SDG&E Grid Assessment Results CAISO Stakeholder Meeting September 22, 2017 Habib Maiga
Expansion Plan Summary Project # Project Title I SO Status I SD Cost ($M) Proposed Projects Requiring CAI SO Approval 2017-0074 Pending 2020 $13 - $16 Boulevard East (BUE) Phase Shifting Transformer 2017-0138 Pending 2022 $10 - $13 Mira Sorrento Reliability Project 2017-0086 Pending 2022 $36 - $47 Otay 69 kV Reconfiguration 2017-0093 Penasquitos Phase Shifting Transformer Pending 2019 Pending 2017-0091/92 Miguel-Mission 230 kV lines Reconductor and Compensation Pending 2020 Pending 2017-0094 Mission-San Luis Rey 230 kV lines Compensation Pending 2019 Pending Projects submitted in prior TPP’s requiring CAI SO approval P16XYZ HVDC Conversion Pending TBD Pending
Expansion Plan Summary Boulevard East (BUE) Phase Shifting Transformer
Project Title: District: Need-Date: Project: Boulevard East PST Mountain Empire 2020 2017-XXX TL626 to SY Existing Driving Factor: Normally Open • TL626 being removed from service as part of 69 kV Line CNF scope. 500 kV Line Cost to keep TL626 is $62.6 Million. DESCANSO o 138 kV Line • P2 of Loveland bus, P6 or P7 of TL625 & TL629 TL6957 will island the CNF load pocket. Substation Scope: GLENCLIFF LOVELAND • TL625 Close in TL6931 • RFS BK50 at BUE and replace with 100 TL629 MVA +/- 45 degree PST. To OCCOTILLO • CRESTWOOD Upgrade all protection, jumpers and terminal TL6957 equipment in CNF area to achieve a 136MVA continuous rating. TL6958 BOULEVARD • Use the removed BUE BK 50 to replace MS TL50004 BK 50 which operates at 132kV. We can TL6931 better manage VAR resources maintaining BARRETT TL6923 ECO consistent 138kV bus. TL13844 CAMERON Issues: • Need a second feed into the CNF load pocket. TL626 to SY Proposed 69 kV Line • The delay of Granite loop-in presents a need New PST to control the flow along TL6931 to prevent Modified 69 kV line TL631 NERC violations. DESCANSO • N-1 of TL50001 or TL50003 presents a need TL629 to control the flow along TL6931 to prevent NERC violations. GLENCLIFF LOVELAND TL625 Benefits: • TL629 Reliability – Two Feeds into CNF load pocket To OCCOTILLO • Cost – Alternative to keeping TL626 CRESTWOOD TL6957 • RPS Goal – PST will provide a third outlet that will help reduce congestion caused by TL6958 renewables at Miguel and Sycamore BOULEVARD TL50004 Alternatives: TL6931 • PST Location moved to OLD BUE BARRETT TL6923 ECO Cost: Approximately $13 - $16 Million TL13844 CAMERON
Expansion Plan Summary Mira Sorrento Reliability Project
Project Title: Mira Sorrento Reliability Del Mar (Segment Existing Penasquitos Project Mira Sorrento To Be RFS) District: Beach Cities Need-Date: 2020 Driving Factor: Doublet • P1 of TL662 (Penasquitos-Torrey Pines) and P7 combination of TL662 & Eastgate TL6905 overload TL666 (Penasquitos – Dunhill Doublet tap) above its continuous rating and TL666 (Penasquitos – Dunhill tap) above its emergency rating respectively Rose Torrey • Any P6 outage combination of TL6959 Canyon (Penasquitos-Mira Sorrento), TL 6905 Pines (Penasquitos – Genesee) & TL6943 (UCM-Torrey Pines) will overload the remaining line above its emergency Miramar rating 69 kV Line UCM Genesee Tap Scope: Overloaded Lines • Open TL661 (Eastgate-Penasquitos) & loop in to Mira Sorrento Substation (1 Proposed Del Mar (Segment mile) Penasquitos Mira Sorrento To Be RFS) Benefits: • Mitigates NERC violations • Operational flexibility Doublet Issues: • No generation available in the load Eastgate Dunhill pocket to mitigate NERC violations Costs: • $10 - $13 M Rose Torrey Alternatives: Canyon Pines • New line from Genesee to East Gate • TL 6927 Loop-in at Genesee • New line from Penasquitos to Genesee 69 kV Line Miramar • Tap TL 6927 at Genesee UCM Genesee New Line Tap
Expansion Plan Summary Otay 69 kV Reconfiguration
X Contingency 69 kV Line Miguel Miguel Overloaded Line Reconductored/Extended 69 kV Line line Border Tap Border Tap TL6964 TL6964 Otay Tap Otay Lake Tap Salt Creek Salt Creek BB BB Otay Otay Lake Lake Otay Otay TL647 TL647 TL649A TL649A TL649F TL623A TL69YY TL649G TL649G TL623C IB IB Border TL649D Border TL69XX TL623 TL623B San Ysidro San Ysidro Driving Factor: Scope: • Cat P1 & P6 violations • Open Otay Lake Tap (TL649A/D/F). • Combine TL649D (San Ysidro - Otay Lake Tap) and TL649A (Otay Lake Tap – Otay) to create a Issues: single TL69XX line (San Ysidro - Otay) and reconductor TL69XX to achieve a 97/136 MVA rating. • San Ysidro Non-Coincidental load projected to be approximately 50 MW by 2019. • Extend TL649F (Border Tap - Otay Lake Tap) 2 mi to Otay to create a new TL649A (Border Tap – • Imperial Beach Non-Coincidental load projected to be approximately 52 MW by 2019. Otay) with a 97/136 MVA rating. • Cannot dispatch any generation to fix an overload to a radialized load (IB or SY). • Open Otay Tap (TL623A/B/C) • Beginning in 2019, an N-1 of TL6964 (Miguel – Salt Creek) loads TL649A (Otay – Otay Lake Tap) to • Combine TL623B (IB – Otay Tap) and TL623A (Otay – Otay Tap) to create a single TL623 and 120% of its emergency rating. reconductor the portion of TL623B to achieve a 137 MVA continuous rating. • Beginning in 2019, an N-1 of TL623 (Otay Tap) loads TL649A (Otay – Otay Lake Tap) to 102% and • Extend TL623C (SY – Otay Tap) 0.5 miles into Otay to create a new TL69YY line (SY-Otay) with a TL649D (San Ysidro – Otay Lake Tap) to 100% of its emergency rating with PK load at San Ysidro. 102 MVA continuous rating. • Beginning in 2019, an N-1 of TL649 (Otay Lake Tap) loads TL623C to 100% of its emergency rating. • Reconductor TL647 (BB-IB) to achieve a 137 MVA continuous rating. • Beginning in 2019, an N-1-1 of TL645 & TL646 loads TL647 to 161% of its emergency rating and TL623B to 125% of it’s emergency rating. Cost: • $36-47 Million
Expansion Plan Summary Mission-San Luis Rey 230 kV lines Compensation
Project Title: District: Need-Date: Project: MS-SA Series Com pensation Bulk Power June 20 19 P17XXX Driving Factors: Palomar Energy Center Due to Heavy North Bound San Luis Rey Flow 23003 • P1 violation of TL 23011 23011 X X New Artesian overloads TL23003 . Encina 230/ 69kV PROPOSED MS-SA • P1 violation of TL 23003 ~ COMPENSATION overloads TL23011 (Encina Tap –San Luis 23004 23001 2305 23012 23051 Rey) . 3 Sycamore Mitigations: 23071 • Build thyristor-controlled series compensation on LOADS the two MS-SA lines to Penasquitos balance the system 23013 impedances; push more Increase loading northbound flow into SA Suncrest via the two MS-SA lines 23041 23027 23021 Old Town Alternatives: • Install PST(s) at the two 23028B Mission ML-SA lines SRPL Im port 2302 23028A • Loop in TL 23011 at San 9 Luis Rey (7.2 Miles) Silvergate 2302 6 Bay Blvd 2302 2302 3 2 2304 ML-BB #2 2 Miguel SWPL ~ Im port
Expansion Plan Summary Miguel-Mission 230 kV lines Reconductor and Compensation
Project Title: Need -Da te: Project: Miguel-Mission Lines Reconductor with Series Com pensation June 20 19 P17XXX Scope: Palomar Energy Center • Install 50-70% series San Luis Rey compensation on ML-MS 23003 lines (TL23022/23). 23011 New Artesian • Reconductor TL23022 and Encina PROPOSED ML-MS 230/ 69kV TL23023 between Fanita Junction and MS COMPENSATION & ~ Benefits: RECONDUCTOR • Provide better outlet 23004 23001 2305 23012 23051 capability at ML therefore 3 Sycamore mitigate the overloads on Reduce the ML-BB-SG-OT path 23071 Reduce Congestion • Reduce the congestion on X Congestion SCR-SX lines and SX-PQ LOADS line Penasquitos • Draw more northbound 23013 flows on the 2 ML-MS 230kV lines Suncrest Reduce Congestion • Create counter flows to 23041 23021 23027 offset the congestion on Old Town MS-OT 230kV lines • Mitigate P6 overloads on 23028B Mission SRPL Im port TL23026 (BB-SG) for the 2302 23028A With Series loss of TL23071 (SX-PQ) 9 Com pensatio followed by the loss of TL Silvergate n 23022 or TL23023 Alternatives: 2302 • Install PST(s) on the two 6 Reduce Increase ML-MS lines Congestion loading Build 2 nd BB-SG line Bay Blvd • 2302 2302 X • Install series reactor on 3 2 2304 ML-BB #2 BB-SG line (TL23026) 2 • Limit generation dispatch Miguel SWPL at Otay Mesa ~ Im port
Expansion Plan Summary Penasquitos Phase Shifting Transformer
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