Tutorials

There's more to energy than joules

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/ Published on:

Wed, 04/05/2006 - 15:08

Energy is not only about quantity. Its quality is equally important. This minute lecture, inspired by an idea from Camatini & Kester, introduces the concept of exergy, the quality measure for an amount of energy. It uses the example of space heating with various methods: electric heating, fossil-fired boiler and heat pumps.

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Power Quality Tutorial (35011)
How does the electricity system function? (72239)
Explaining reactive power (47968)

Transformers in power distribution networks

By :

Stefan Fassbinder

/ Published on:

Mon, 08/31/2009 - 08:33

Why do we need transformers? The answer is simple: impedance. If power losses in electricity distribution networks are to be kept within reasonable limits, then large amounts of electric power have to be transmitted across long distances at the highest feasible voltage. In absolute terms, the higher the trans-mission voltage, the smaller the current and hence the smaller the (resistive) power losses in the transmission cables. But increasing the transmission voltage also reduces a given power loss in relative terms.

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Power Quality Tutorial

By :

Hans De Keulenaer

/ Published on:

Mon, 01/14/2008 - 15:59

Summary:

The source file of the PQ Tutorial free to use and modify for users of the media room.

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Voltage and Frequency Control of the Grid

By :

Hans De Keulenaer

/ Published on:

Wed, 11/28/2007 - 12:09

As the fifth in a series of tutorials on the power system, Leonardo ENERGY introduces its minute lecture on voltage and frequency control, using the analogy of a metal/rubber plate to demonstrate the centralised nature of frequency control, whereas voltage control is more a local matter.

frequency

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Spinning Reserve

By :

Hans De Keulenaer

/ Published on:

Wed, 11/28/2007 - 12:08

To counterbalance unexpected fluctuations in electricity production or consumption.What if users consume more electrical energy than scheduled? Or less? Since liberalisation, the Transmission System Operator has been responsible for keeping the balance between generation and consumption. This is done by the so-called 'spinning reserve'. The following minute lectures present you a short overview on the spinning reserve, how it is defined, and how it operates.

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Explaining Reactive Power - 4 further analogies

By :

Hans De Keulenaer

/ Published on:

Mon, 03/05/2007 - 01:00

Following the Minute Lecture Four analogies to explain reactive power, we received many reactions. Several writers suggested further analogies.

This inspired us for making a sequel to this minute lecture, with four more analogies worked out.

When explaining reactive power to lay persons, you can pick any analogy of your choice, according to your target audience.

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Tutorials

There's more to energy than joules

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Transformers in power distribution networks

Power Quality Tutorial

Voltage and Frequency Control of the Grid

Spinning Reserve

Explaining Reactive Power - 4 further analogies

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Tutorials

There's more to energy than joules

Main content

Popular content

Transformers in power distribution networks

Power Quality Tutorial

Voltage and Frequency Control of the Grid

Spinning Reserve

Explaining Reactive Power - 4 further analogies

Pages

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