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1. What suppositions are made within the transient stability analysis model of electrical power systems and what is the underlying theory?
2. What main measures exist to improve the transient stability of electrical power systems? What is the principle of each measure?
3. Give the method used to modify an admittance matrix when short-circuit failures at different locations and of different fault types occur on one transmission line in an electrical network, and list essential calculation formulas.
the dynamic resistance for rectifying junctions is given by rdyn didv-1. for a junction diode having reverse
For a current flowing on a sheet, how would you define the current density at a point on the sheet? What are the units?
An engineer working in asatellite station complex has received the program by an earthstation and routed the signal through a rectangular waveguide ofdimensions (axb=2.4x1.2) to control room 12.2m away fromthe station feed horn.
Write the mathematical expression for the current iL and the voltage vL after the switch is closed. - Sketch the waveform of iL and vL from the initial value to the steady-state level.
Using a computer simulation, determine the small-signal differential-mode voltage gain and common-mode voltage gain.
A motor is connected to a 120 V rms, 60 Hz line. The motor is rated at 2 kVA and operates with a power factor of 0.8.
Which of these is the best description of a zener diode?
Hosts A and B are communicating over a TCP connection, and Host B has alreadyreceived from Host A all bytes up through (and including) byte 248. Suppose Host A then sends two back-to-back segments to Host B.
design a logic program that will track the activity for one turnstile. there will be three inputs PHASEA, B and RESET. there will be no output. the program should be able to track 999 total guests.
A 1 load draws 6 MW at 0.8 power factor lagging. Determine the reactive power required from a parallel capacitor to bring the power factor of the parallel combination up to 0.93
A fluid flows through a turbine at the rate of 45 kg/min. Across the turbine the specific enthalpy drop of the fluid is 580 kj/kg and the turbine loses 2100 kj/min in the form of heat energy. Determine the power produced by the turbine.
A 100-watt motor (60% efficient) is used to raise a 100-kilogram load 5 meters into the air. If the task takes 65 seconds to complete, how heavy was the load in units of kilograms
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