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1. What are the major manifestations of low-frequency oscillation? Why is the oscillating frequency among local generators lower than that among generators in a plant, and the oscillating frequency among regional generators is lower than that among local generators?
2. What are the main measures to control low-frequency oscillation?
Design a metering circuit to measure the line-to-neutral voltage and line currents on a three-phase four-wire, 4.16-kVswitchgear main circuit breaker rated at 2000 amperes.
A binary data stream needs to be transmitted at 5 Mbit/s by means of binary signaling. To reduce ISI, a cosine roll-off pulse of roll-factor r = 0.25 will be used. Determine the minimum required bandwidth for this transmission
analyze how the reforms of mikhail gorbachev led to the breakup of the soviet union. point out what events led to the
Determine the maximum possible heat removal rate through the fin. What fin length would provide a close approximation to the heat rate found in part (a)? Hint: Refer to Example 3.9.
A buck converter has Vs=30 V, Vo=20 V, and a switching frequency of 40 kHz. The output power is 25 W. Determine the size of the inductor such that the minimum inductor current is 25 percent of the average inductor current.
A 200 kV A, 3.3 kV, 50 Hz three-phase synchronous generator is star-connected. The effective armature resistance is 5 Ω/phase and the synchronous reactance is 29.2 Ω/phase.
Using data from Fig. 10-9a, calculate the power dissipated in the sample per unit volume when it is biased just below threshold if rc0 is chosen from the calculation of part (a). In general, does operation at a higher frequency result in greater p..
A windmill park produces energy at a tension level of 11kV. The park is going to be coupled up with a 11kV net not far from the park. To reduce the loss in transer the tension is tranfomred p at the parka nd down again right before coupling to the..
Describe the nuclear-thermal routes for hydrogen production.
If inductive load has a 2ohm resistance and 2microhenry inductance in series with a 120V/60Hz source and a capacitor is connected parallel to the entire load so no reactive power is being delivered by the source what is the capacitance value.
Capacitance can be altered by immersing part of the two wire line into a different medium. (a) What is the capaccitance per unit length in F/m of the transmission lines. You must explain your reasoning and show the equation you used.
a piston cylinder device initially contains steam at 3.5 MPa, superheated by 5 C. steam loses heat to the surrounding and the piston moves down hitting a set of stops at which point the cylinder contains saturated liquid water.
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