Transcript BELIZE ELECTRICITY LIMITED - Public Utilities Commission

BELIZE ELECTRICITY LIMITED
Electric System Presentation
January 8, 2014
Rolando Santos
Senior Manager, System Planning and Engineering
&
Kevin Longsworth
Manager, Control Centre
INFORMATION
As of December 31, 2013
Customers
82,260
System Peak Load 2013
84 MW
Total Sales
484 Gigawatt-hours
Employees
278
Independent Power Producers
BECOL (hydro)
51.5 MW
BAPCOL (HFO/diesel)
15 MW
CFE (combination)
50 MW
BELCOGEN (biomass)
13.5 MW
INFORMATION
BEL’s Internal Supply
Gas Turbine (diesel)
21.0 MW
Standby Generators - Caye Caulker (diesel) 2.0 MW
Distribution Voltages
6.6kV, 11kV, 13.2kV, 22kV
RELIABILITY
SAIDI – System Average Interruption Duration Index
SAIDI (HRS)
39.1
24.4
2010
2011
22.8
2012
20.1
20
2013
2014F
RELIABILITY
SAIDI – System Average Interruption Duration Index
SAIFI (EVENTS)
31.4
16.2
2010
2011
15.9
2012
13.5
13
2013
2014F
NORTHERN ZONE
Corozal Free Zone – 5 MVA 34.5/13.2 kV
Corozal Substation – 7.5 MVA 34.5/6.6 kV
– 2 MVA 34.5/22 kV
San Pedrito Substation – 3 MVA – 34.5/6.6 kV
Buena Vista Substation – (2)10 MVA – 115/34.5 kV
Orange Walk Substation – 10 MVA – 34.5/6.6 kV
– 4.2 MVA – 34.5/22kV
Belcogen Substation (IPP) – 22.6 MVA 115/13.8 kV
Maskall Substation - 10 MVA 115/34.5 kV
San Pedro Ambergris Substation - 10 MVA 34.5/22 kV
Boca Del Rio Substation – 5MVA 22/6.6 kV
CENTRAL ZONE
Army Camp Substation - 5 MVA 22/6.6 kV
Belize City Substation – 20 MVA 115/6.6 kV
West Lake Substation - 14 MVA – 115/22 kV
La Democracia Substation - 30 MVA -115/69 kV
WESTERN ZONE
Camalote Switching Station
Belmopan Substation – 16MVA – 115/24.9 kV
Belmopan Substation -7 MVA -115/11kV
San Ignacio Substation -10MVA -115/22kV
VACA Substation (IPP) -25MVA -115/6.9kV
Mollejon Substation (IPP) -30MVA -115/6.9kV
Challilo Substation (IPP)- 10MVA -115/6.9kV
SOUTHERN ZONE
Mullins River Substation – 3 MVA 69/22 kV
Dangriga Substation – 14 MVA 69/24.9 kV
BAL Substation (IPP) – 22 MVA 69/13.8kV
Savannah Switching Station
Independence Substation – 14 MVA 69/24.9 kV
Surfside Placencia – 3 MVA 22/6.6 kV
Hydro Maya (IPP) – 5 MVA 22/4.16kV
Punta Gorda Substation – 14 MVA 69/24.9 kV
115 kV
Xulha Mexico to Westlake – 86.7 Miles
Belcogen Spur – 2.2 Miles
Westlake to Belize City – 8.2 Miles
Westlake to Mollejon – 80.6 Miles
Mollejon to Challilo – 10.7 Miles
115 kV
Xulha Mexico to Westlake – 86.7 Miles
Belcogen Spur – 2.2 Miles
Westlake to Belize City – 8.2 Miles
Westlake to Mollejon – 80.6 Miles
Mollejon to Challilo – 10.7 Miles
69 kV
La Democracia to Dangriga - 39.6 Miles
Dangriga to Independence – 42.7 Miles
Independence to Punta Gorda - 45.4 Miles
BAL Spur - 3.87 Miles
115 kV
Xulha Mexico to Westlake – 86.7 Miles
Belcogen Spur – 2.2 Miles
Westlake to Belize City – 8.2 Miles
Westlake to Mollejon – 80.6 Miles
Mollejon to Challilo – 10.7 Miles
69 kV
La Democracia to Dangriga - 39.6 Miles
Dangriga to Independence – 42.7 Miles
Independence to Punta Gorda - 45.4 Miles
BAL Spur - 3.87 Miles
34.5 kV
Buena Vista to CZL – 22.35 Miles
Buena Vista to OW -13.28 Miles
Maskall to San Pedro – 14 Miles
TECHNICAL CONCERNS
• System Voltage Issues
• Frequency Stability Issues
• Penetration of Variable Power Supply
• Improving System Reliability
• Technical Losses
EXISTING SUPPLIES
BECOL:
• 2 – 3.5 MW units at Challilo
• 3 – 8.5 MW units at Mollejon
• 2 – 9 MW units at Vaca
• 1 – 1 MW unit at Vaca
• Becol’s Energy Dispatch involves water management
• Inflows may occur between plants
• Medium-term dispatching based on dam inflows and guide-curve
• Charges for generation below capacity during spilling
• Average CoP < 100 GWh around U$ 0.12/kWh
Reservoir Level (m)
396.00
391.00
396.80
396.50
396.20
396.00
395.70
395.40
395.10
394.80
394.40
394.10
393.80
393.40
393.10
392.80
392.40
392.00
391.70
391.30
391.00
390.60
390.30
390.00
389.60
389.30
389.10
388.90
388.70
388.50
388.40
388.30
388.20
388.10
388.00
388.00
388.00
388.00
388.00
389.00
390.00
391.50
393.00
394.20
394.80
395.40
396.10
396.70
397.40
398.00
398.00
397.80
397.50
397.30
397.00
EXISTING SUPPLIES
Chalillo Guide Curve 2013
401.00
386.00
381.00
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
End Of Week
Guide
Actual
EXISTING SUPPLIES
BELCOGEN:
• 2 – 90 t/hr bagasse fuelled boilers
• 1 – 12.5 MW backpressure turbo unit (for base load at 12 MW)
• 1 – 15 MW extraction/condensing unit (for load share)
• PPA 13.5 MW to BEL with > 60 % availability annually
• Steam production for BSI and BEL; simultaneously
• Slow start-ups (2 to 4 hrs hot-start; 6 hrs cold-start)
• Reduced output during off-crop (July-Oct)
• Belcogen’s sugar production determines electrical production
• Average CoP around U$ 0.10/kWh
EXISTING SUPPLIES
CFE:
• PPA allows up to 50 MW of supply to BEL
• Opportunity Energy and Emergency Energy currently exist
• Currently revising the Opportunity Energy contract
• Emergency demand charge if exceeds 10 days or continuous 72 hrs
• CFE’s connection to BEL provides grid stability
• Average CoP depends on Marginal Cost at the Chetumal node.
EXISTING SUPPLIES
CFE:
• Average monthly marginal costs
CFE Marginal Costs
2012
2013
Jan
$0.1340
$ 0.1326
Feb
$0.1259
$ 0.1355
Mar
$0.1381
$ 0.1252
Apr
$0.1604
$ 0.1737
May
$0.1618
$ 0.1599
Jun
$0.1623
$ 0.1300
Jul
$0.1615
$ 0.1158
Aug
$0.1462
$ 0.1338
Sep
$0.1442
$ 0.0556
Oct
$0.1729
$ 0.0621
Nov
$0.1411
$ 0.0452
Dec
$0.1537
EXISTING SUPPLIES
HML:
• Run of River hydro producing up to 3.5 MW
• No minimum-take clause in the PPA
• Average CoP around U$ 0.07/kWh
EXISTING SUPPLIES
BAPCOL:
• PPA is 15 MW
• Primary operation mode as emergency unit
• Start-up 5 minutes in hot-standby
• Secondary operation mode as peaking unit during CFE high prices
• Average CoP dependent on HFO prices (approx. U$ 0.19/kWh)
EXISTING SUPPLIES
BEL GT:
• 20 MW LM2500 GE gas turbine unit
• Primary operation mode as an emergency unit
• Start-up time 20 minutes
• Average CoP dependent on diesel fuel prices (approx. U$ 0.30 /kWh)
GRID LOAD AND SUPPLY CONDITIONS
Lowest 2013 production month:
– February 40.7 GWh (76% Load Factor)
Highest 2013 production month:
– May 50.4 GWh (81% Load Factor)
DRY SEASON (January to June)
Peak – 84.2 MW in April 2013 (80% Load Factor)
RAINY SEASON (July to December)
Peak - 82.8 MW in August 2013 (79% Load Factor)