WATCH: Here's how Eskom generates (or tries to) the electricity we use | The Citizen

Only a few minor power generators have remained outside Eskom’s fold.Eskom on its website said producing electricity from coal starts when the coal is pulverised into a fine powder in huge mills, before it is blown into huge kettles, called boilers.

Due to the heat in the boiler, the coal particles combust and burn, to generate heat which turns water into steam. The steam from the boilers is used to turn the blades of a giant fan or propeller, called a turbine.The generator produces an electric current, which is sent to the homes and factories of consumers via power lines.The OCGT are powered by fuel oil , and operate on a similar principle as coal-fired generators, except that it costs multiple times more.

This is why these units supply electricity into the national grid only during peak hours and in emergency situations. In addition to their generating capabilities the units are also used to regulate network voltage fluctuations .

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