Problem A delta connected capacitor bank is now installed in parallel with the combined- motor load in the previous problem. (a) What value of capacitive reactance is required in each leg of the capacitor bank to make the source power factor unity? (b) Determine the magnitude of the line current delivered by the source with the capacitor bank installed.
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- two alternators A and B having 5% speed regulation are working in parallel at a station. Alternator A is rated at 15 MW while B is at 20 MW. When the total load to be shared is 12 MW, then how much of the load will be shared by the alternator B?2. Clear and complete solution.In a certain sub-station, there are 5 d.c. shunt generators in parallel, ench having an armature resistance of 0.1 0, running at the same speed and excited to give equal inducnd emfs Each generator supplies an equal share of a total load of 250 kW at a terminal voltage of 500 V into a load of fixed resistance. If the field current of one generator is raised by 4%, the others remaining unchanged, calculate the power output of each machine and their terminal voltages under these conditions Assume that the speeds remain constant and flux is proportional to field current
- What is virtual synchronous Generators and their applications in MicrogridI already solved for the 0.8pf lagging. My question is for voltage regulation with 0.8pf leading! Thank you! Example is from in classA single-phase motor takes 10A at a power factor of 0.7 lagging when connected to a 230V, 50 Hz supply. A capacitor bank is connected in parallel with the motor to raise the power factor to unity.i) Draw the phasor diagram before and after power factor correction with the supply voltage taken as the reference phasor. ii) Calculate the percentage change in the supply current after power factor correction.iii) Calculate the value of capacitance required.
- A DC series generator is supplying a current of 5A to a series lighting system through a feeder ofto total resistance, 1.0 ohm. The terminal voltage is 2500 V. The armature and series fieldresistances are respectively 18 and 15 ohms respectively. A 30-ohm diverter resistance isshunted across the series field. Determine the power developed in the armature of thegenerator?A: A synchronous generator of 100 MVA, 22 kV, and 0.25 pu transient reactance supplies a motor of 50 MVA, 22 kV, and 0.2 pu transicnt reactance. The motor is drawing 40 MW at 0.8 power factor leading and terminal voltage of 21 9 kV. The line connecting them has a reactance of 0,05 pu on a base of 100 MVA. Find the transient currents in the generator, the motor, and the fault when a 3-ph fault occurs at the motor termınals Take Sa 100 MVA, V = 22 kV, and use the internal voltages of the machines method. (1-2)b) Two synchronous generators, G2 and G2, are connected parallelly supplying a load. Generator G1 has a no-load frequency of 50.5 Hz and a slope of 300 MW/Hz. Generator G2 has a no-load frequency of 50.2 Hz and a slope of 500 MW/Hz. The load consumes 250 MW real power. (1) At what frequency does this system operate, and how much power is supplied by each of the two generators? (ii) An additional 100 MW load is added to this power system. What is the new system frequency, and how much power do G1 and G2 supply? (iii) The governor set point of G2 is changed to control system frequency back to 50 Hz. Determine the G2 governor set point.
- A 80 MVA synchronous generator has Xs = j8Ω. The generator is supplying itsrated power to an infinite bus at a voltage of 33KV and a power factor of 0.9lagging.Determine the following:a) The generator emf (E) and the power angle.b) The maximum power (Pmax) that the generator can supply and the armaturecurrent (Ia) in this case (i.e. when the power is maximum) and what is thepower factor?There are two alternators, 100kW, 3phase in parallel are driven by shunt motors whose speed load characteristics are as follows: Alternator No. 1, no-load speed 600rpm and the full-load speed 530 rpm, while alternator No. 2, no-load speed 590 rpm and full-load speed 550rpm while alternator 2, no load speed 590 rpm and full load speed 550 rpm. What is the greatest load that can be delivered without overloading either alternator?Please answer the question by showing step by step and explaining each step with details, please? Especially, by explaining why you used that formula or calculations. Thanks in advance. This question is related with electromechanical energy conversion (electrical electronic engineering).