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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.
Define real time operating system. Real time operating system (RTOS): The real operating system is an operating system used in embedded applications which performs tasks in a
a single phase is supplied with sinusoid voltage v(t)=200cos(377t).the resulting instantaneous power is p(t)=800+1000cos(754t-36.7). find
Q. Find the output function Y for the logic circuits of Figure (a) and (b). An AOI (AND-OR-INVERT) gate is shown in Figure with its two possible realizations. Obtain the output
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Example of binary subtraction - positive number Case 1. Positive number is more than negative number ( i e, answer is positive) Example subtract 4510 ( 1011012
Thyristor Terminology The followings terms are used in SCR specifications: Latching current : The latching current is the value of on stat e current required to mai
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Q. The unit impulse response h(t) of a linear system is h(t) = 5e -t cos(2t - 30°). Determine H(s).
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