southern California. ISO witness Millar testified that SONGS was “critical in supporting voltages and transfers into San Diego.” The ISO modeled 720 MVAR of dynamic reactive support in its Track 4 studies, while SCE/SDG&E (jointly) modeled 1,220 MVAR of dynamic reactive support. The ISO model included some, but not all, resources with potential to mitigate the loss of reactive support provided by SONGS in its Track 4 analysis. The Johanna, Santiago, and Viejo shunt capacitors are completed and included in the ISO’s modeling. The Huntington Beach synchronous condensers are also completed. However, while the Huntington Beach condensers are assumed by the ISO to be available in the 2018 SONGS-out assessment, they are not included in the revised Scoping Memo’s Track 4 2022 assumptions. ORA points to a number of potential resources which may provide additional VAR support but were not modeled by the ISO, including some data from the ISO’s 2012/13 TPP. ORA proposes a 350 MW reduction in need to approximate the impact of additional reactive power resources expected to decrease the need for real power, but ORA recommends that this estimate be confirmed by comprehensive power flow studies in the ISO’s 2013-2014 TPP. CEJA shows that SDG&E has proposed two 230 kilovolt (kV) synchronous condenser projects that provide 480 MVARs of dynamic reactive support within the SONGS study area. CEJA contends that a rough estimate of the total need reduction in the San Diego area resulting from these projects is at least 200 MW. SCE has proposed adding another 550 MVAR [Static VAR Compensators] at San Onofre. CEJA shows that the ISO estimates that this addition will reduce need in the LA Basin by 300 MW. This reactive support was not included in the 2022 results of the ISO’s Track 4 Opening Testimony.
southern California. ISO witness Millar testified that SONGS was “critical in supporting voltages and transfers into San Diego.” The ISO modeled 720 MVAR of dynamic reactive support in its Track 4 studies, while SCE/SDG&E (jointly) modeled 1,220 MVAR of dynamic reactive support. The ISO model included some, but not all, resources with potential to mitigate the loss of reactive support provided by SONGS in its Track 4 analysis. The Johanna, Santiago, and Viejo shunt capacitors are completed and included in the ISO’s modeling. The Huntington Beach synchronous condensers are also completed. However, while the Huntington Beach condensers are assumed by the ISO to be available in the 2018 SONGS-out assessment, they are not included in the revised Scoping Memo’s Track 4 2022 assumptions. ORA points to a number of potential resources which may provide additional VAR support but were not modeled by the ISO, including some data from the ISO’s 2012/13 TPP. ORA proposes a 350 MW reduction in need to approximate the impact of additional reactive power resources expected to decrease the need for real power, but ORA recommends that this estimate be confirmed by comprehensive power flow studies in the ISO’s 2013-2014 TPP. CEJA shows that SDG&E has proposed two 230 kilovolt (kV) synchronous condenser projects that provide 480 MVARs of dynamic reactive support within the SONGS study area. CEJA contends that a rough estimate of the total need reduction in the San Diego area resulting from these projects is at least 200 MW. SCE has proposed adding another 550 MVAR [Static VAR Compensators] at San Onofre. CEJA shows that the ISO estimates that this addition will reduce need in the LA Basin by 300 MW. This reactive support was not included in the 2022 results of the ISO’s Track 4 Opening Testimony.