TITLE : TRANSMISSION OF ELECTRICAL ENERGY

NO. OF LESSONS INVOLVED : 3 DOUBLE LESSONS

LEVEL : S.5

AIM:

After the lessons, students should understand how electrical power is transmitted.

OBJECTIVES:

After the lessons,

(1) students should understand the theory and structure of d.c. and a.c. generators,
(2) students should also understand the theory and structure of transformer,
(3) students should be able to draw a diagram of the transmission system, including power supply, transformers and cables,
(4) students should be able to point out the advantage for using transformers in the transmission system,
(5) students should be able to give brief descriptions of the transmission system in Hong Kong by surfing the websites of the two company supplying electricity in Hong Kong.

RESOURCES:

(1) Courseware

Multimedia CD-Rom 3 (PAW 3)

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(2) Powerpoints on generator, transformer and transmission of electrical energy, including videos downloaded from internet (eletran.ppt).

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(3) Videos - ETV

V1    Generator

V2    Transmission of electricity

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(2) Tailor-made Web Page

Web-page on transmission system in Hong Kong

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(3) Web-sites:

(W1http://home.a-city.de/walter.fendt/physengl/generatorengl.htm

          (This Java applet simulates a generator.)

 (W2)   http://www.clpgroup.com  ( CLP Holdings Limited)

             http://www.chinalightandpower.com.hk  (CLP Holdings Limited)

 (W3)    http://www.hec.com.hk     (The Hongkong Electric Co., Ltd.)  

LESSONS SCHEDULE:

Lessons Topics Resources
1,2 Generator eletran.ppt

PAW 3

V1

W1

3,4 Transformer eletran.ppt

PAW 3

5,6 Transmission of electrical energy eletran.ppt

PAW 3

V2

W2, W3

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