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Explain Synchronous Generators?
They can be utilized to produce or absorb reactive power. An over-excited machine produces reactive power when an under-excited machine absorbs it. The generator is the major source of supply to the system of both of the positive and negative VArs. The ability to supply VArs is ascertained by the short-circuit ratio (1/ synchronous reactance).
For economic reasons, in current units this ratio is kept low and therefore the inherent ability to run at leading power factors is not large. For instance, a 200 MW, 0.85 p.f. machine with a 10% stability margin can just supply 45 MVAr at full power outputs.
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NAND Gate NAND means NOT AND it complements the output of an AND gate. The symbol of NAND by a NOT gate. Generally Not operation is represented by a bubble as shown
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Q. In the ideal inverting summing amplifier circuit with two inputs, for R f = 10 k, find R 1 and R 2 so that v o = -10v i1 -5 vi2 .
Measures of regulator quality: The output voltage can just be held roughly constant; the regulation is fixed by two measurements: 1. Load regulation is the alteration in ou
how i make this and how cost of overall
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