Category: 2. Transmission

There are three main types of Overhead Transmission Lines: Short transmission line – The line length is up to 60 km and the line voltage is comparatively low less than 20KV. Medium transmission line – The line length is between 60 km to 160 km and the line voltage is between 20kV to 100kV. Long transmission line –…

What is Mobile Substation? Sometimes it is required to supply power to a particular place in fully temporary basis. Such as at civil contraction or other construction places where huge consumption of electricity is required but after completion of the construction work the necessity of power will not be as high as during construction.In these…

Electrical Substation Now days the electrical power demand is increasing very rapidly. For fulfilling these huge power demands the modern time requires creation of bigger and bigger power generating stations. These power generating stations may be hydro-electric, thermal or atomic. Depending upon the availability of resources these stations are constructed different places. These places may…

In olden days people do not have integrated power system as we have now. They had their own standard and load items which are suitable for their power system. That time they had operating frequency range between 16.75 Hz to 133.33 Hz. When people think about large power generation system, they puzzled with the standard that to…

The massive transmission of electricity in the form of DC over long distances by means of submarine cables or overhead transmission line is the high voltage direct current transmission. This type of transmission is preferred over HVAC transmission for very long distance when considering the cost, losses and many other factors. The names Electrical superhighway…

Load Curve A graphical plot showing the variation in demand for energy of the consumers on a source of supply with respect to time is known as the load curve.If this curve is plotted over a time period of 24 hours, it is known as daily load curve. If its plotted for a week, month,…

We can not store electricity. Thus we have to generate electricity when it is required and as much it is required. The electrical source either it is generating station or substation or any other electric utility, has to fulfil the maximum demand of all connected loads to that source. But we are fortunate enough that…

Presently 3-ø AC system is very popular and being used worldwide for power generation, power transmission, distribution and for electric motors. Three phase system has the following advantages as compare to single phase system: Power to weight ratio of 3-ø alternator is high as compared to 1-ø alternator. That means for generation for same amount of Electric Power,…

What is a Power System? An electric power system is defined as a network of electrical components used to supply, transfer, and consume electric power. The supply is done through some form of generation (e.g. a power plant), the transfer is done through a transmission (via a transmission line) and distribution system, and the consumption…

The connection of several generating stations in a network of particular transmission voltage level is commonly known as electrical grid system. By interconnecting different power generating stations we can solve various difficulties arise in power system. The structure, or “network topology” of a grid can vary depending on the the load and generation characteristics, constraints…