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A 3-phase, wye-connected, 11.8 kV, 100 MVA turbo- generator of 0.8 power factor lagging has a synchronous reactance of 2.0 p.u. on rating. The generator is driven by a steam turbine delivering a maximum power of 90MW. It is known that the fielf current limit in a (P,Q) plane can be represented in terms of the line-to-line voltages and 3-phase powers as:
Where Emax and Pmax are the maximum induced voltage (e.m.f.) and real power respectively. Assume the generator to be ideal for convenience of analysis.
A. Sketch the capability curve clearly indicating the characteristic operating limits.
B. What is the maximum reactive power the generator can produce?
C. Can this generator supply 70 MW at 0.7 power factor lagging? Explain your answer.
Why armature core in a DC machine is constructed with laminated steel instead of solid steel sheets
For a 45-kVA, three-phase, wye-connected, 220- V synchronous machine at rated armature current, the short-circuit load loss (total for three phases) is 1.80 kWat a temperature of 2
The arm of a hydraulic robot is controlled as shown in the block diagram below: The arm dynamics are represented by: Dynamic specification for the arm requires:
Semiconductor in Equilibrium Equilibrium in semiconductors implies the following: (i) Steady state: ∂Z / ∂t = 0 In which Z is any physical quantity like charge, volt
Triode Mode When V GS > V th and V DS GS - V th ) The transistor is turned on, and a channel has been created that allows current to
Q. For an n-channel JFET with V A = 350 V, I DSS = 10 mA, and V P = 3V, find V DS that will cause i D = 11 mA when v GS = 0.
Q. What is a differentiator circuit? By introducing electrical reactance into the feedback loops of op-amp amplifier circuits, we can cause the output to respond to changes in
Q. Determine the Thevenin resistance viewed from terminals A-B of the circuit of Figure by setting independent sources to be zero and applying a test voltage at terminals A-B.
Simbulation
Program Analysis We have to find the greater of two given number. We can store the given numbers in two different registers ( suppose register A and B). Then we will com
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