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load-modifier, and is projected to be constant at approximately 6.3 percent of the summer and winter total peak demands for all years of the assessment period. SERC FL-Peninsula expects to add approximately 9,000 MW of new generation over the 10-year planning horizon, predominantly natural gas, variable energy resources, and battery storage. Additionally, SERC FL-Peninsula is planning to retire approximately 4,798 MW of coal and gas generators. Natural gas supplies about 2/3 of the capacity in the SERC FL-Peninsula in 2020. Coal and nuclear provide 11 percent and 6 percent of SERC FL-Peninsula capacity, respectively. Petroleum and solar each provide 3 percent for summer peak. Approximately 111 miles of new transmission lines in the SERC FL- Peninsula are in the design/construction phase and are projected to enhance system reliability, interconnect new generators, and meet the growing load demand. Other projects include reconductoring existing transmission lines and other system reconfigurations/additions to support transmission system reliability. The coordinated reliability studies performed by the SERC FL- Peninsula entities through the FRCC have shown that the performance of the transmission system within the FL-Peninsula subregion is reliable, adequate, and secure for the near-term and long-term planning horizon.
State of Reliability of SERC Florida Peninsula Anticipated Reserve Margins for the SERC Florida Peninsula (FL- Peninsula) are expected to remain above 20 percent for the 10-year planning horizon. The SERC FL-Peninsula is summer peaking, with a forecast total internal demand of 49,286 MW in 2020. The total internal demand forecast for winter 2020/2021 is 44,625 MW. The SERC FL- Peninsula’s net internal demand is the fastest growing of all subregions within SERC, increasing by approximately 1 percent over the 10-year planning horizon. Entities within the SERC FL-Peninsula subregion model Distributed Energy Resources (DERs) with their associated loads and netted out since the load forecasts of entities within the SERC FL-Peninsula subregion account for these loads implicitly. Currently, the SERC FL-Peninsula subregion has low penetration levels of DERs; however, penetration levels are expected to grow throughout the planning horizon. The SERC FL-Peninsula entities work through the FRCC standing committees and subcommittees to monitor jointly the projected growth within the subregion. Currently the SERC FL-Peninsula subregion has a large number of solar projects requested in the interconnected queue over the next 5 years that are being studied collaboratively between the Florida entities and the Florida Reliability Coordinating Council. Controllable Demand Response from interruptible and dispatchable load management programs within the FL-Peninsula is treated as a
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