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Distributed And Dispersed Generation - EEEGUIDE.COM

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Integrated Circuits Important Questions. Distributed And Dispersed Generation. Distributed And Dispersed Generation:. Distributed And Dispersed Generation using many small generators of 2-50 MW output, installed at various strategic points throughout the area, so that each provides power to a small number of consumers nearby. These may be solar, mini/micro hydel or wind turbine units, highly efficient gas turbines. Small combined cycle plants, since these are the most economical choices. The main challen...

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Energy Storage - EEEGUIDE.COM

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Integrated Circuits Important Questions. There is a lot of problem in storing electricity in large quantities. Energy which can be converted into electricity can be stored in a number of ways. Storage of any nature is however very costly and its economics must be worked out properly. Various options available are: pumped storage, com-pressed air, heat, hydrogen gas, secondary batteries, flywheels and superconducting coils. As already mentioned, gas turbines. Hydrogen can be used as a medium for energy tr...

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Deregulation - EEEGUIDE.COM

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Integrated Circuits Important Questions. For over one hundred years, the electric power industry worldwide operated as a regulated industry. In any area there was only one company or government agency (mostly state-owned) that produced, transmitted, distributed and sold electric power and services. Deregulation as a concept came in early 1990s. It brought in changes designed to encourage competition. The earliest reforms in power industries were initiated in Chile. They were followed by England, the ...

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AC Operation of Magnetic Circuits - EEEGUIDE.COM

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Integrated Circuits Important Questions. AC Operation of Magnetic Circuits. AC Operation of Magnetic Circuits:. Of transformers, ac machines and several other electromagnetic devices are excited from ac rather than dc sources. With ac operation, inductance is effective even in steady-state operation. Often, the flux is determined by the impressed voltage and frequency, and the magnetization current has to adjust itself in accordance with the flux so that B-H relationship is satisfied. And its rms value is.

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Magnetically Induced Emf and Force - EEEGUIDE.COM

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Integrated Circuits Important Questions. Magnetically Induced Emf and Force. Magnetically Induced Emf and Force:. Faraday’s law of induction, which is the integral form of the fourth Maxwell’s equation, is given as. With the sign of the emf determined by Lenz’s law. Change in flux linkages of a coil may occur in three ways:. I) The coil remains stationary with respect to flux, but the flux through it changes with time. The emf induced is known as statically induced emf. The dynamically induced emf (case ...

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Magnetic Circuits - EEEGUIDE.COM

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Integrated Circuits Important Questions. The exact description of the magnetic field is given by the Maxwell’s equations* and the constitutive relationship of the medium in which the field is established. Hence Eq. (2.1) acquires the form. The units of flux density are weber (Wb)/m2 called tesla (T). The term ,u0 is the absolute permeability of free space and has a value of. Now, the core flux density is given by,. And core flux (assumed to be total flux) is given by,. Where A, = cross-sectional area of ...

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Hysteresis and Eddy-Current Losses - EEEGUIDE.COM

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Integrated Circuits Important Questions. Hysteresis and Eddy-Current Losses. Hysteresis and Eddy-Current Losses:. When a magnetic material undergoes cyclic magnetization, two kinds of power losses occur in it hysteresis and eddy-current losses which together are known as core-loss. The core-loss is important in determining heating, temperature rise, rating and efficiency of transformers, machines and other ac run magnetic devices. In order to avoid the need for computation of the loop area, Steinmetz gav...

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Energy Conservation - EEEGUIDE.COM

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Integrated Circuits Important Questions. Energy conservation is the cheapest new source of energy. We should resort to various conservation measures such as cogeneration. Everyone should be made aware through print or electronic media how consumption levels can be reduced without any essential lowering of comfort. Rate restructuring can have incentives in this regard. There is no conscious-ness on energy accountability yet and no sense of urgency as in developed countries. In India corporate sector is re...