Power Transmission and Distribution

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  Electricity is generated at power plants. It moves through a complex system, called the grid, of electricity substations, transformers, and power lines that connect electricity producers and consumers. Most of the local grids are interconnected for reliability and commercial purposes, forming larger, more dependable networks that enhance the coordination and planning of electricity supply. Generation, delivery and utilization of electric energy and power is still one of the most exciting and challenging fields of electrical engineering. Amazing technological developments of our age are highly dependent upon a reliable, safe and economic supply of electrical energy. Power is passed over a transmission network of high voltage lines. Generally, these lines run into hundreds of kilometres and deliver the power into a common power pool called the grid. Grid is connected to load centres over a sub-transmission network lines.