Download - Energy sd -4 march 2011
CUSTOMER FORUM
PROPOSED NEW ELECTRICITY TARIFFS FOR
JULY 2011
Chief Engineer: Metering, Vending and Tariffs
Stephen Delport
4 MARCH 2011
IMPORTANT NOTES ON THIS PRESENTATION
• The format of the tariffs was very recently
changed, following ongoing discussions with
the National Energy Regulator of South Africa
• The set of tariffs under discussion here has
not yet been considered by Councilnot yet been considered by Council
• It is also not “given” that NERSA will approve
the current format
IMPORTANT NOTE
• Council must still consider this draft of tariffs…
THE FORMAT OF THIS PRESENTATION
• The presentation is built around graphical
information, providing a technical picture
BACKGROUND
BACKGROUND
BACKGROUND
METER READING PATH - FULL
BRIEF INDICATION ON REVENUE SEGMENT –
PREPAYMENT• The 3RD biggest segment of customer, at 180 000 customers, 7% of income
• The segment is under control, but much work is taking place to improve:
• Third party vending has been strengthened.
• Point of sale, cellular technology, internet vending, etc
• Tampering rate is managed
• Penalty rate applied and often paid by customer
• Tembisa and IMS doing well, although the system is getting old
• Protective structure volumes have grown and indicate need for closer
management – measures are being put in placemanagement – measures are being put in place
• Exciting new technologies to consider
REVENUE SEGMENT – PREPAYMENT EAST
R 100 000 000
R 150 000 000
R 200 000 000
R 250 000 000
R 300 000 000
2007-2008-2009-2010 MEGAFLEX: PURCHASES OF ELECTRICITY kWh COSTS
R0-00: PEAK vs STANDARD vs OFF-PEAK and kVA
R0-00 Peak kWh
R0-00 Stnd kWh
R0-00 Off-Peak kWh
R0-00 kVA
2 per. Mov. Avg. (R0-
00 Peak kWh)
2 per. Mov. Avg. (R0-
00 kVA)
R -
R 50 000 000
J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J
0%
10%
20%
30%
40%
50%
60%
City of Ekurhuleni Percentage Increase in R/kVA and c/kWh:
Purchases of Electricity : Jan 2007 till Jan 2011% Increase kVA
% Increase kWh
-30%
-20%
-10%
0%
•
20.0%
30.0%
40.0%
50.0%
Percentage Increases in c/kWh only: July 2006 to Jan 2011
% Increase kWh
% Eff Increase
2 per. Mov. Avg. (% Increase kWh)
2 per. Mov. Avg. (% Eff Increase)
-10.0%
0.0%
10.0%
Jul/
05
Oct
/05
Jan
/06
Ap
r/0
6
Jul/
06
Oct
/06
Jan
/07
Ap
r/0
7
Jul/
07
Oct
/07
Jan
/08
Ap
r/0
8
Jul/
08
Oct
/08
Jan
/09
Ap
r/0
9
Jul/
09
Oct
/09
Jan
/10
Ap
r/1
0
Jul/
10
Oct
/10
Jan
/11
Energy Demand Reduction of 12% by 2015 for SA: via
energy efficiency improvements
Total kWh Purchased
10 000 000 000
10 500 000 000
11 000 000 000
11 500 000 000
Series1
Moving Ave
9 000 000 000
9 500 000 000
Jan - Dec
2003
Jan - Dec
2004
Jan - Dec
2005
Jan - Dec
2006
Jan - Dec
2007
Jan - Dec
2008
Jan - Dec
2009
Jan - Dec
2010
Tariff D Base line Tariff 2011/12 2011/12 2011/12 2011/12
Increase > 11kV >230/400 V & < = 11kV 230/400 V direct from sub
Tariff D-"0%" 2010/11 21.30% 0% 8% 10%
PEAK c/kWh 176.700 214.34 214.34 231.48 235.77
STANDARD c/kWh 62.00 75.21 75.21 81.22 82.73
OFF-PEAK c/kWh 37.40 45.37 45.37 49.00 49.90
PEAK c/kWh 65.70 79.69 79.69 86.07 87.66
STANDARD c/kWh 43.10 52.28 52.28 56.46 57.51
OFF-PEAK c/kWh 34.00 41.24 41.24 44.54 45.37
Jun & Jul & Aug NMD R/kVA R 29.00 35.18 35.18 37.99 38.69
Sep-May NMD R/kVA R 29.00 35.18 35.18 37.99 38.69
NAC R/kVA R 17.40 21.10 21.10 22.79 23.21
R 1.50
R 2.00
R 2.50
R 3.00
R 3.50
R 4.00
c/k
Wh
1000 kVA: Electricity Tariffs: 2011-12: c/kWh v/s Load Factor
EMM 2011/12 TAR C
EMM 2011/12 TOU TAR E
<1MVA
TOU > 1MVA TAR D 2011-12
R -
R 0.50
R 1.00
5.0
%
10
.0%
15
.0%
20
.0%
25
.0%
30
.0%
35
.0%
40
.0%
45
.0%
50
.0%
52
.0%
55
.0%
58
.0%
60
.0%
62
.0%
65
.0%
68
.0%
70
.0%
72
.0%
75
.0%
78
.0%
80
.0%
85
.0%
90
.0%
95
.0%
98
.0%
10
0.…
R 1.50
R 2.00
R 2.50
R 3.00
R 3.50
R 4.00
R 4.50
c/k
Wh
100 kVA: Electricity Tariffs: 2011-12: c/kWh v/s Load Factor
EMM 2011/12 TAR C
EMM 2011/12 TOU TAR E
<1MVA
ESKOM NEW 2011-12
R -
R 0.50
R 1.00
5.0
%
10
.0%
15
.0%
20
.0%
25
.0%
30
.0%
35
.0%
40
.0%
45
.0%
50
.0%
52
.0%
55
.0%
58
.0%
60
.0%
62
.0%
65
.0%
68
.0%
70
.0%
72
.0%
75
.0%
78
.0%
80
.0%
85
.0%
90
.0%
95
.0%
98
.0%
10
0.…
IMPORTANT NOTE
• Demand no longer measured in off-peak. NAC…
R 15 000
R 20 000
R 25 000
R 30 000
Tar B Business: Account impact: 3-ph versus 1-ph and various
Load Factors
Series1
Series2
Series3
Series4
Series5
L.F. 30% 40A up to 150 A 1-ph
R 0
R 5 000
R 10 000
40 50 60 70 80 90 100 110 120 130 140 150
L.F. 30% 40A up to 150 A 1-ph
L.F 20% 40A up to 150A 3-ph
L.F. 30% 40A up to 150A 1-ph
L.F. 40% 40A up to 150A 3-ph
IMPORTANT NOTE
• On Tariff B, the capacity should not be
overstated…
ESKOM PURCHASES: DEMAND COMPONENT
• Transmission NC + NAC + NMD
=(3.51+7.04+13.35)*1.2671
• R30.284 (2011/12 Eskom R/kVA/month) X• R30.284 (2011/12 Eskom R/kVA/month) X
103.92 kVA
• =R 3,147.17 (Eskom R/kVA/month)
R 0.95
R 1.00
R 1.05
R 1.10
Tar B Busines versus Tar B Res c/kWh at various L.F.
Tar B Res
Tar B Bus
40 Amp Bus
R 0.80
R 0.85
R 0.90
0.1 0.1 0.2 0.2 0.3 30% 0.4 0.4 0.5 0.5 0.6 0.6 0.7 0.7 0.8 0.8 0.9 0.9
R 1 500.00
R 2 000.00
R 2 500.00
R 3 000.00
TARIFF A vs TARIFF B : 2011/2012
690
R 0.00
R 500.00
R 1 000.00
Number of kWh units
New IBT A
(Un)sustainable Increases:-
2010/11 Increase Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8
Sales 1.55 X 1.2 1.86 2.23 2.68 3.21 3.86 4.63 5.55 6.66
Purchases 1.00 X 1.2671 1.27 1.61 2.03 2.58 3.27 4.14 5.24 6.64 Purchases 1.00 X 1.2671 1.27 1.61 2.03 2.58 3.27 4.14 5.24 6.64
1.55 Ratio 1.47 1.39 1.32 1.25 1.18 1.12 1.06 1.00
I Thank You
Any Questions? Any Questions?