SNMANUEL

1
BROWNING500
BROWNING
SEV500
CATSHV14
SEV230
SNTAROSA500
CATSHV
09
SNTAROSA
230
CATSHV
10
TESTTRAK
230
COOLIDGE 230
SUNDANCE
LONE BUT
230
CATSHV
02
CAT
07500
CASAGRND
230
CASAGRND
115
PINAL SOUTH
EMPIRE
CATSHV
15
CATSHV
11
CATSHV
16
CATSHV
01
DBG
CATSHV
03
ED
-
5
ED
5
B
BONNEYTP
COOLIDGE 115
CASGRAPS
CATSHV
06
VLYFARMS
CATSHV
05
SIGNAL
SAG
.
WEST
115
BRADY
SAGUARO
ED
4
230
TATMOMLI
SNMANUEL
ORACLE
CATSHV SATURATED LOAD STUDY
CATSHV
12
to Winchester
LEGEND
EXISTING LINE EXISTING BUS NEW CATSHV BUS
230kV LINE 500kV LINE
N
.
LOOP
230
2
CATS HV Saturated Load StudyPhase 1 Existing
System
3
CATS HV Saturated Load StudyPhase 2 Proposed
Substations
4
CATS HV Saturated Load StudyPhase 3 Receiving
Station areas
5
CATS HV Saturated Load StudyPhase 4 Generation
Transmission
6
CATS HV Saturated Load StudyGeneration Dispatch
7
CATS HV Saturated Load StudyLoads

• Loads distributed at existing and proposed
  substations
• 50 load case 5199 MW
• 75 load case 7799 MW
• 100 load case 10399 MW

8
CATS HV Saturated Load StudyPreliminary N-0
50, 75, and 100 load findings

• Added elements do not overload
• N-0 Overloads (rtg 1) 100 load case
• Coolidge-Sundance 230kV line (115)
• Santa RosaCats01 230kV line (118)
• (loop in of existing Santa Rosa-Tatmomli-Saguaro
  230kV line)
• Cholla-Saguaro 500kV line (157)

9
CATS HV Saturated Load StudyPreliminary N-1
50, 75, and 100 load findings

• Overload Issues
• Numerous Severe (rtg 2) mostly outside study
  region!
• Overloads to note (for 100 load case)
• Jojoba-Kyrene 500kV line (103) for loss of Pinal
  West Santa Rosa 500kV
• Pinal West Santa Rosa 500kV line (132) for
  loss of Jojoba-Kyrene
• TestTrack-Casa Grande 230kV (146) for loss of
  Casa Grande Desert Basin 230kV
• Coolidge-Sundance 230kV (180) for loss of
  parallel line, was 115 in base case

10
CATS HV Saturated Load StudyNext Steps

• Further Analyze 50, 75 and 100 cases
• Draft Report for 1/12/06 Meeting
• Final report for 1/31/06 submittal to ACC