Power transmission line

246

03:04:18

Power transmission line from power generating stations to the city consumers

Step 1

Power is generated at 11kV 50Hz

Step 2

The voltage is stepped up to 132kV using a step up transformer. This is because for a given power, greater the voltage, lesser is the current flowing through the wire (P=VI) and lesser current means less loss power due to heating effect ( H=I²Rt).

Step 3 

Voltage is stepped down from 132kV to 33kV . Some of it is used by heavy industries.

Step 4

33kV is stepped down to 11kV and some of it is used by light industries

Step 5

11kV is stepped down to 220V for city consumers.

The above circuit shows the steps in power transmission line. The yellow and red switches symbolize heavy and light industries respectively.

Summing up

11kV AC to 132kV AC to 33kV AC to 11kV AC to 220V AC

published 9 years ago

hurz

9 years ago

Guess what https://en.m.wikipedia.org/wiki/Root_mean_square

Saya2001

9 years ago

Did you like it?

hurz

9 years ago

Have you read it?

Saya2001

9 years ago

I have read it but did not understand anything

hurz

9 years ago

Check this, it might help you to understand http://everycircuit.com/circuit/4699420976742400

hurz

9 years ago

So what is the correct peak voltage for 11kVAC?

Saya2001

9 years ago

11kV AC is the peak only while the DC Voltage is 7778.17V

rich11292000

9 years ago

Your output is 220v peak. It needs to be 220v rms. 220x1.414=311v peak. The value of voltage is rated in rms.

rich11292000

9 years ago

Imagine a resistor to make a heater. Apply 1VDC, then measure max heat output. Then apply 1.414VAC "PEAK" then measure max heat output. The DC heater will produce the same heat that the AC heater produces, they will also consume the same wattage. This 1.414VAC "PEAK" is the same (force/pressure) as 1VDC. So for 11kVAC (11kVAC "RMS") we need to multiple the rms value by 1.414. 11x1.414=15.55kVAC"PEAK".

Saya2001

9 years ago

Yes

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