Power is the basic need for the economic development of any country. Availability of electricity has been the most powerful vehicle of introducing economic development and social change throughout the world. The process of modernization, increase in productivity in industry and agriculture and the improvement in the standard of living of the people basically depend upon the adequate supply of electrical energy. Appropriately the programs relating to the generation, transmission and distribution of electrical energy have been the highest priority in the national planning process.
Power System Structure
Generating stations, transmission lines and distribution systems are the main components of an electrical power system. Generating stations and distribution systems are connected through transmission lines, which also connect one power system to another. A distribution system connects all the loads in a particular area to the transmission line.
The transmission system of an area (or state) is called the grid. The different grids are interconnected through tie lines to form a regional grid and the different regional grids are further interconnected to form a national grid. Each grid operates independently. However, power can be transmitted from one grid to another, via the tie lines under conditions of sudden loss of generation or increase in load.
Electrical energy is normally generated at the power stations far away form the urban areas where consumers are located. The problem, therefore, is to transport (or more usually called transmit) the large blocks of poer over long distances economically.
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- Advantages and Disadvantages of HVDC Transmission Lines
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