4. When a generator has terminal a open and the other two terminals are connected to each other with a short circuit from the connection to ground, typical values for the symmetrical components of current in phase are Ia(1)=600∠-90, Ia(2)=250∠90, Ia(1)=350∠90 A. Find the current into the ground.
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4. When a generator has terminal a open and the other two terminals are connected to each other with a
short circuit from the connection to ground, typical values for the symmetrical components of current in
phase are Ia(1)=600∠-90, Ia(2)=250∠90, Ia(1)=350∠90 A. Find the current into the ground.
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- The reactance of a generator is given as 0.1 pu based on the generator of 17 KV, 300 MVA. Determine the pu reactance on a base of 17 KV, 250 MVA. New pu reactance is.......2. A synchronous generator is connected to an inductive load, please draw phasor diagram to show the relationship between the internal generated voltage of the generator and the terminal voltage across the load. If the same generator is connected to a capacitive load, please draw phasor diagram to show the relationship between the internal generated voltage of the generator and the terminal voltage cross the load again. Explain the difference of the terminal voltage responses at these two types of loads.A generator at no-load operates 61 Hz, slope 1MW/Hz. Load 1= 1.0 MW and load 2=0.8MW are connected. Find the frequency before and after adding the load 2. (Using House Diagram)A. 60 Hz & 59 Hz C. 60 Hz & 59.2 HzB. 60 Hz & 59.1 Hz D. 60 Hz & 59.3 Hz
- Figure 1 shows an electric generator with 3 rotor windings as marked by a-1, b-2 and c-3. A permanent magnet is placed in the middle of the rotor with the rotational direction. The 3 rotor windings are connected through line to the three identical load resistors R₁, R₂ and R3 in Wye connection. The resulting currents in each line are la, lb and Ic. Design the generator-line-load connections, and propose the methodologies to construct 3-phase 3-wire connection. Use a diagram to justify your answers. D (0 N $1 Figure 1Q/A Generator operation dt 50 HZ, delivers 1-1 P-u. Power to an infinite busbar Throught a Networke. A Fan It accurs which reduces The maximum Transferable to 0-6 p.whereas before the fanilt This power was 1.8 p.u. and after the clearanes of the fault it is 1-3 P-4, If the inertia constant of Generator is 2.7 mil MUA, Ibtain the swing curve (0-200ms) For a fault clearance time of (100ms) (let =), Then examine the 0.05 Sec stability of the system.e = 0 Q1: What does happen if we change two currents? a. Q2: What does happen if we have a three-phase four poles machine? Q3: What does happen if we have a two-phase two poles machine? e = 0 Q4: What does happen if we apply a capacitance in phase b and then use same voltage for both phase. Dr. Ali Ki. pw --
- Draw the complete circular stator winding for a three phase delta connected AC generator consisting of 4 poles and 24 slots using a parallel connection. Your submission must consist of two drawings as follows: One drawing must show the winding arrangement of the phasegroups in the slots of the stator highlighting the start and finish of each phasegroup The other drawing must show only the end connections of each phase group for a parallel connection of the phasegroups and a delta connection of the phases3 X 0.1 1 2 XL = 0.2 to Eato oto O X = 0.1 X = 0.1 Above is the one-line diagram of a simple power system. Each generator is represented by an emf behind the subtransient reactance. All impedances are expressed in per unit on a common base. All resistances and shunt capacitance are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A symmetrical fault occurs at bus 1 through a fault impedance Z, =j0.08 per unit. a) Using Thevenin's Theorem, determine the impedance to the point of fault and the fault current in per unit. (2 Marks) b) Find the bus voltages and line currents during the fault. (2 Marks)A synchronous generator runs at 250 rpm and generators at 60HZ. There are 240 slots each containing 5 conductors arranged in full-pitched winding for three-phase star connection. All the conductors of each phase are in series and the flux per pole at no-load distributed sinusoidally over the pole pitch is 2.5 x106 Maxwell. What is the emf induced in each winding and the terminal voltage?
- a 3 phase, 50 hz synchronous generator has 200 conductors per phase. The flux per pole is 30mwb and the winding factor is 0.96. what is the value of the line voltage if the stator winding is connected in a)delta and b)starA 6 pole, 3.3 kV, 50 Hz dalta -connected three-phase induction generator has the following equivalent circuit parameters: R1 = 0.5Ω, R2' = 0.4Ω,X1 = 1.8Ω, X2' = 1.5Ω, Xm and R0 are large enough to be ignored. The generator is operating at a slip of -0.05. Determine the output real and reactive power, the generator power losses, the input mechanical power and the generator efficiency.Draw a complete equivalent circuit of one phase only of a synchronous generator. Then draw the phasor diagram for a unity power factor. Assume the phase resistance is ignored