1. Key Biscayne Substation
Armando Fernandez
February 14th 2018

2. Key Biscayne Substation
Key Biscayne’s Transformers show no distribution capacity constraints and there are no significant load growth projections in the area
Key Biscayne Substation
Key Biscayne Distribution details
2 Transformers  (138 – 13 kV)
45 MVA TX #2759 – load 26.6 MVA 
45 MVA TX #2760 – load 14.3 MVA
7 – 13kV distribution feeders
Feeder
MVA
Rating
805331
5.1
10.2
805332
8.8
12.7
805333
5.7
11.3
805334
3.9
10.0
805335
8.5
10.5
805336
4.7
805337
4.3

3. In comparing the data,  the 2017 peak for the island reflects only 1MVA growth since the 2006 peak
Planning Cases
2006 Planning case
Substation
2006 Actual
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
KEY BISCAYNE
39.4
40.1
40.9
42.1
45.0
46.4
47.7
49.1
50.4
51.8
53.1
54.5
The request to expand Key Biscayne Substation in 2007 was centered on the 2006 planning case which forecasted tremendous growth out of this substation based on some of the highest growth years at FPL
2006 demand projections forecasted FPL would exceed the MVA rating of one of our transformers
FPL must always have the ability to handle the load requirements on one of our transformers for redundancy
Construction and permitting timetables, drove the need to apply for the expansion of Key Biscayne Substation
Due to a 2008 pause on the rate of construction and new services, revised forecast demonstrate more stabilized growth curve which demonstrates no capacity constraints
2017 Planning case
Substation
2017 Actual
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
KEY BISCAYNE
40.9 41
41.1
41.3
41.6
42.0
42.4
42.9
43.5
Key Biscayne Substation - there are no distribution capacity constraints and there are no significant load growth projections in the area