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Oil and gas production handbook An introduction to oil ... - ABB Group

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training facilities are often connected (read only) <strong>to</strong> the live plant <strong>to</strong> provide<br />

information from the real operating situation.<br />

8.3 Power generation, distribution <strong>and</strong> drives<br />

Power can be provided from mains power,<br />

local <strong>gas</strong> turbines or diesel genera<strong>to</strong>r sets.<br />

Large facilities have high power dem<strong>and</strong>s,<br />

from 30 MW up <strong>to</strong> several hundred MW.<br />

There is a tendency <strong>to</strong> generate electric<br />

power centrally <strong>and</strong> use electric drives for<br />

large equipment rather than multiple <strong>gas</strong><br />

turbines, as this decreases maintenance<br />

<strong>and</strong> increases uptime.<br />

The power generation system on a large<br />

facility is usually several <strong>gas</strong> turbines<br />

driving electric genera<strong>to</strong>rs, 20-40 MW<br />

each. Exhaust heat is often needed in the<br />

main process.<br />

Figure 36. Electrical single line diagram<br />

117

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