and a 7-to-10 year lead time to put in new transmission lines. ISO witness Millar testified that “we have identified the…low-hanging fruit where transmission reinforcement was a viable way to reduce local capacity requirements” and these reinforcements were included in the ISO forecasts. CEJA contends that the ISO should have assumed in its models a 600 MW transmission load transfer to resolve the most critical contingency for the overall LA basin involving the Mira Loma West transmission line. According to CEJA, this transfer would significantly lower levels of LCR in the LA basin, if feasible. The ISO states that “it is a reasonable assumption to base the 2021 local area generation on the proposed [600 MW] mitigation.” The ISO also states that it has had preliminary discussions with SCE on this matter, but needs to obtain a cost and schedule for such an upgrade from SCE. SCE witness Cabbell testified that SCE has not performed any technical analysis or power flow modeling on this proposal, which would require further investigation with the ISO. However, she understands that this mitigation measure could be useful for reducing the LA basin local area LCR but not necessarily the Western LA basin sub-area LCR. We find there is no conclusive evidence that any assumptions used by the ISO with regard to transmission capacity and contingencies are not appropriate. It is possible or even likely that there are certain mitigation options for transmission constraints or certain transmission upgrades which were not fully considered by the ISO and which may become feasible. It is also possible that certain transmission fixes may become feasible and cost-effective, including the use of synchronous condensers, static var compensators and shunt capacitors, all of which SCE considers annually. In future procurement proceedings and in
and a 7-to-10 year lead time to put in new transmission lines. ISO witness Millar testified that “we have identified the…low-hanging fruit where transmission reinforcement was a viable way to reduce local capacity requirements” and these reinforcements were included in the ISO forecasts. CEJA contends that the ISO should have assumed in its models a 600 MW transmission load transfer to resolve the most critical contingency for the overall LA basin involving the Mira Loma West transmission line. According to CEJA, this transfer would significantly lower levels of LCR in the LA basin, if feasible. The ISO states that “it is a reasonable assumption to base the 2021 local area generation on the proposed [600 MW] mitigation.” The ISO also states that it has had preliminary discussions with SCE on this matter, but needs to obtain a cost and schedule for such an upgrade from SCE. SCE witness Cabbell testified that SCE has not performed any technical analysis or power flow modeling on this proposal, which would require further investigation with the ISO. However, she understands that this mitigation measure could be useful for reducing the LA basin local area LCR but not necessarily the Western LA basin sub-area LCR. We find there is no conclusive evidence that any assumptions used by the ISO with regard to transmission capacity and contingencies are not appropriate. It is possible or even likely that there are certain mitigation options for transmission constraints or certain transmission upgrades which were not fully considered by the ISO and which may become feasible. It is also possible that certain transmission fixes may become feasible and cost-effective, including the use of synchronous condensers, static var compensators and shunt capacitors, all of which SCE considers annually. In future procurement proceedings and in