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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.
Determine flux in the central limb: For the magnetic circuit shown in Figure the value of flux in the right limb is 0.48 m Wb and the number of turns wound on the central limb
Consider and obtain the values for R S , R 2 , R 1 , and R D . Apply the rule-of-thumb dc design procedure outlined in this section for a JFET with V P = 3V, I DSS = 20 mA, and a
In continuation of Part-B, the student is required to configure an engine management system for the proposed engine and produce a report including the following: A preamble
Discuss important properties and uses of Glass and glass products. Glass and glass products - Glass is an inorganic material build by the fusion of various metallic oxides. The
How is 8255 (Programmable Peripheral Interface) configured if its control register contains 9B h. Ans. Programmable Peripheral Interface Command Byte B (sets or
Describe the basic process of Spark Erosion (Electric Discharge) machining? Discuss the advantages of EDM as compared to other nontraditional procedures with regard to : (i)
general functions of time base generator
Explain the different types of polarizations. Polarizations are of three types. i. Electric polarization ii. Ionic polarization. iii. Dipolar polarization.
recent trends in power system
Q. What do you mean by Dial Pulses? Dial Pulses: Dial pulsing (many times known as rotary dial pulsing) is the method originally used to transfer digits from a telephone set
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