post by – CURIOUS CREATION blog – devilsangelsite.wordpress.com

Hello! As a person working in power transmission sector, I would like to share with you some of the basic things about power and it’s transmission. You can see my blog- devilsangelsite@wordpress.com


Power is the amount of energy transferred or converted per unit time. In electrical system, it is the amount of energy transmitted or consumed per unit time. 

The S.I. unit of power is Watts, i.e., joules per second. 

P (power) is mathematically expressed as, 
P= VI where
V= system voltage & I= current flowing through the system.


Power is generated at power generation centers by using resources such as coal, fuel, water, radioactive materials, renewable energy sources such as solar power, wind, tide etc.

Based on the source or raw material used for generation, power generation centers are classified into various categories such as: Thermal generation, hydro power generation, nuclear power generation, solar generation, wind energy generation, tidal energy generation etc. 

Most commonly used resources are thermal generation ( from coal) and hydro power generation (from water ). 

As bio fuel is limited and hydro power has its own limitations, so renewable energy sources are the need of the hour. So, solar power is in high demand now. 

But due to the high capital cost of initial investment and installation, it is not easy to setup solar generation centers and also the solar cells used for generation purpose has reached Maximum efficiency of 12-16% as of now. More research is being done to improve the cell efficiency to increase the power output.

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Power is generated at the generation centers at the Voltage level of upto 11KV due to insulation problem and considering the equipment size. 

Power is then transmitted at the level of 132KV-765KV by setting up transformers. This transmission of power is done at very high voltage to reduce the current flowing through the conductor which then reduces the conductor size and cost and transmission losses. 

Power transmission is done by power transmission sector which maintains the transportation of bulk amount of power to other transmission points and to distribution centers.


After transmission of power, it is then distributed to industrial and domestic consumers through power distribution sector.

Before distribution, the Voltage level is stepped down upto 33KV level by means of step down transformers.

The distribution sector transmit power to commercial consumers at 33KV level and domestic consumers at 0.4KV level.

0.4KV is the 3-phase power that we know today. The single phase to neutral voltage of 230V is used for domestic usage purpose.

So, overall this is the process of power generation, transmission and distribution in the power sector.
Thank you for reading the post.

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