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Two identical 300-kVA 480-V synchronous generators are connected in parallel to supply a load. The prime movers of the two generators happen to have different speed droop characteristics. When the field currents of the two generators are equal, one delivers 200 A at 0.9 PF lagging, while the other delivers 180 A at 0.75 PF lagging.
(a) What are the real power and the reactive power supplied by each generator to the load?
(b) What is the overall power factor of the load?
(c) In what direction must the field current on each generator be adjusted in order for them to operate at the same power factor?
Two single-phase 33 kV/11 kV transformers rated at 400 kVA and 500 kVA are connected in parallel to supply 800 kVA at a pf of 0.85 lagging. The transformers have percent impedances of 5.38% and 6.1% respectively. Calculate the load on each transfo..
What are the test inputs we use to evaluate steady-state error (SSE). How many integrations in the forward path are needed (type of the system) to get zero SSE for each of these test inputs.
Design an amplifier circuit which uses an OpAmp and is powered by dual 15 V power supplies, and which has the following characteristic at low frequencies: Vout = 3V1 - 5V2 1. State the information which is extracted from the equation.
Design a circuit containing a single op amp that can perform the following operation: Vo= 3x10^4(i2-i1), where i2 and i1 are input current sources.
Design and realize a digital LP filter using the bi-linear transformation method to satisfy the following characteristics: a- monotonic stopband and passband. b- -3.01dB cutoff frequency of o.5pi rad. c- magnitude down at least 15dB at 0.75pi rad.
Fuel Cell produces current by using H2. Anode reaction: H2-->2H+ + 2e- Cathode reaction: 4e- + 4H+ +O2 --> 2H2O. The rate at which Hydrogen enter the fuel cell is given as 5 L/min. The temperature is constant at 300K.
Steam enters an adiabatic nozzle at 3.5Mpa and 300C with a low velocity and leaves at 1.6Mpa and 250C at a rate of 0.4kg/s. If the surrounding is 10 at 100Kpa and 18C, find A) The exit velocity B)The 2Nd law efficiency
The equivalent circuit parameters are R1=0.48 ohms, X1=0.80 ohms, R2'=0.42 ohms, X2'=0.80 ohms, Xm=30 ohms The motor is operating with slip of 0.04. Find the input current and power factor.
assume that the passengers arrive at a taxi stand according to a poisson process with parameter lambda. there are m
A 3-phase, 440VAC, 6-pole, 60Hz, wye connected induction motor takes 30KVA at .8 power factor lagging, and runs at a slip of 3.5% at full load. The stator copper losses are 500W, and the rotational losses are 350W.
Convert the diagram into PLC format and identify all inputs and outputs by the use of I/O designation charts - Describe very briefly the function and essential features of each block.
A spherical region defined by 0
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