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Electricity - whether obtained from generators fueled by diesel oil, gasoline or coal, or hydro power created by water rushing through dynamos at hydro electric dams provides for a host of servants that we take for granted. Electricity lights out houses, heats and cools our homes and offices, does our work via vacuum cleaners and electronic calculators - computers, as well as provide entertainment via plasma and LCD TVs and iPod mp3 players. We communicate over phones - whether cellular or land line telephone and some of us are even transported by electrical hybrid cars. Yet we generally take electricity and electrical services and products all for granted on an everyday and ongoing basis.
Electrical engineering is a field of engineering that generally deals with the study and application of electricity, electronics and electromagnetism. The field first became an identifiable occupation in the late nineteenth century after commercialization of the electric telegraph and electrical power supply. It now covers a range of subtopics including power, electronics, control systems, signal processing and telecommunications.
POWER SYSTEM
Power engineering, also called power systems engineering, is a subfield of engineering that deals with the generation, transmission and distribution of electric power as well as the electrical devices connected to such systems including generators, motors and transformers. Although much of the field is concerned with the problems of three-phase AC power - the standard for large-scale power transmission and distribution across the modern world - a significant fraction of the field is concerned with the conversion between AC and DC power as well as the development of specialized power systems such as those used in aircraft or for electric railway networks
Power Engineering deals with the generation, transmission and distribution of electricity as well as the design of a range of related devices. These include transformers, electric generators, electric motors and power electronics.
The power grid is an electrical network that connects a variety of electric generators to the users of electric power. Users purchase electricity from the grid avoiding the costly exercise of having to generate their own.
ELECTRICAL MACHINES
An Electrical machine is a device that converts mechanical energy to electrical energy or vice versa, and changes AC voltage from one level to another level.
Electrical machines are divided into three parts: Generator, Motor and Transformer.
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