ANNUAL REPORT - HSE

2.8 Purchasing and
suppliers
2.8.1 Electricity
Synergy
To maximise efficiency, HSE seeks to take advantage of
synergies associated with a wide spectrum of production
units within the Group. Because different production
units have different operational and cost characteristics,
a more cost-effective electricity production
can be achieved through an appropriate combination of
production schedules. And because electricity market
prices fluctuate over time, the economical dispatching
of production units, while observing technical criteria,
is all the more important.
HSE Group’s electricity production units in 2008
DEM Dravograd Vuzenica Vuhred Ožbalt Fala MB otok Zlatoličje Zlatoličje Formin Small HE TOTAL
Period Jan-Jun Jul-Dec
Turbines 3 3 3 3 1+2 3 2+1 2+1 2 1
Net output MW 26 56 72 73 58 60 114 120 116 0.7 576 / 582
Rated
generation MVA 36 78 90 90 74 78 148 159 148 0.9 743 / 754
capacity
Gross head m 8.9 13.7 17.4 17.4 14.6 14.2 33 33 29 105
Rated
flow Qi
m 3 /s 405 550 550 550 505 550 463 463 500
HESS Boštanj TOTAL
Turbines 3
Net output MW 34 34
Rated generation capacity MVA 43,5 43,5
Gross head m 7.6 7.6
Rated flow Qi m 3 /s 500
SENG Doblar I. Doblar II. Plave I. Plave II. Solkan Zadlaščica Small HE TOTAL
Turbines 3 1 2 1 3 2 26
Net output MW 30 40 15 19 32 8 11.4 155.4
Rated generation capacity MVA 48 50 22 23 39 10 15.6 207.6
Gross head m 47.2 48.5 27.5 27.5 23 173.7
Rated flow Qi m 3 /s 90 105 75 105 180 2.2
TEŠ GT 51 GT 52 Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 TOTAL
Period Apr-Dec Sep-Dec Jan-Oct
Net output MW 42 42 25 25 55 248 305 658 / 700 / 742 / 717
Rated generation capacity MVA 56.25 56.25 37.5 37.5 94 324 377 870 / 926 / 982 / 945
TEŠ's Units 1 and 2: Available capacity was reduced to 25 MW due to wear of units.
TEŠ's Unit 5: Generator output is 377 MVA at 3 bars of hydrogen pressure.
TEŠ's Unit 2: No longer operational/used as a non-spinning reserve since 17/10/2008.
TET GU I. GU II. Unit 4 TOTAL
Net output MW 29 29 110 168
Rated generation capacity MVA 34 34 156 224
ANNUAL REPORT HSE | BUSINESS REPORT
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