Electricity Transmission Distance

Central power plants are usually located away from residential or customers. So the electricity generated in coal-fired power needs to be transmitted by a considerable distance. Long-distance transmission of electrical energy is done by using a high voltage, for the following reasons:



Long-distance transmission of electrical energy

    1. When the voltage is high then a small electric current.
    2. With an electric current is small, the energy is lost in transmission wire (energy dissipation) is also small.
    3. Also with a small current is used enough wire Berpenampang relatively small, making it more economical.

Electrical energy or electrical power is lost in the wire transmission distance can be calculated with the equation of energy and power as follows:

W = electrical energy (joules)
I = strong electric current (amperes)
R = resistance (ohms)
t = time
P = power (watts)

Transmission of electrical energy long distances using high voltage will reduce the loss of electricity during transmission by dissipation.

Examples 2 MW electric power transmitted through a cable to a certain distance berhambatan 0.01 ohm. Calculate the power lost by the transmission, if:

    1. using a voltage of 200 volts,
    2. using voltage 400 kilovolt?

completion:
Given: P = 2 MW = 2106 watts
                        
                          R = 0.01 ohm

Asked: a. Philang on the voltage 200 volts = ........... ?
                        
                          b. Philang at voltages V = 4105 volts = ........... ?



                                       

     * So, the energy lost in traveling every second of 106 watts. This value is very large because

     half the power will be lost.

     * So, the energy lost in traveling every second of only 0.25 w