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Basic laws of electric current flow: Remedy: alternating current + transformers NP NS Real transformers: the efficiency may reach 97-98%

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Presentation on theme: "Basic laws of electric current flow: Remedy: alternating current + transformers NP NS Real transformers: the efficiency may reach 97-98%"— Presentation transcript:

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4 Basic laws of electric current flow:

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6 Remedy: alternating current + transformers
NP NS Real transformers: the efficiency may reach 97-98%

7 The same “consumer” as before, but now we use transformers:
But the transformers are not 100% effi- cient; suppose that the efficiency of each one is 97%. Then: Without transfor- mers, we had only 50%, and now we have 93%! Transformers give incredible efficiency improvement!

8 Now it’s clear why we use all those
high-voltage transmission lines, right?

9 Power grid: Java Applet showing how this grid works

10 Good Wiki article about the smart grid
US Department of Labor Web Page

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