A synchronous generator with H = 3.5 is connected to an infinite bar through two lines...
A synchronous generator with H = 3.5 is connected to an infinite bar through two lines with reactances of 0.40 each. The generator internal voltage is 1.2 pu and the operating voltage of the infinite bar is 1.0 pu. A three phase fault occurs on one of the lines between the generator and the infinite bar. The fault is eliminated by opening one of the lines. Determine the critical angle and time to eliminate the fault without losing stability.
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A synchronous generator with H = 3.5 is connected to an infinite
bar through two lines...
Question 2 A 60 Hz synchronous generator with Xd 0.2 pu transient reactance is connected to...
Question 2 A 60 Hz synchronous generator with Xd 0.2 pu transient reactance is connected to an infinite us through a transformer and the transmisiones as shown in the Figure. All system reactances are marked on the diagram and are expressed on a common MVA base. The generator dies a power of Auto busbar 1. The magnitude of the generator's excitation voltage e'is 12 pu, and the infinite bus voltage is -1.00u. If a 3-phase fault occurs at the middle...
A synchronous generator is connected to an infinite bus via a transformer and a network of...
A synchronous generator is connected to an infinite bus via a transformer and a network of transmission lines, as illustrated in Figure 1 below. Per unit reactances for all elements are shown to a common system base. The generator is delivering 1.1 per unit real power to the infinite bus, and the infinite bus voltage is regulated to 1.05 per unit. The excitation voltage of the synchronous generator is set to 1.30 per unit. The inertia constant of the generator...
A 50 Hz, 250 MVA synchronous generator having inertia constant H=5 MJ/MVA is connected to an infinite bus through trans...
A 50 Hz, 250 MVA synchronous generator having inertia constant H=5 MJ/MVA is connected to an infinite bus through transformer and transmission line as shown below. The transformer reactance is based on 500 MVA, while the other impedances are based on the generator MVA Infinite bus 1 2 3 XL 0.1 pu - oto G1 V= 1.0 pu X 0.1 pu Xd = 0.3 pu at 500 MVA The generator is delivering 0.8 of full load current at a power...
A 100MVA synchronous generator is connected to a 25kV infinite bus through two parallel transmission lines....
A 100MVA synchronous generator is connected to a 25kV infinite bus through two parallel transmission lines. The synchronous reactance of the generator is 2.5Ω. Each transmission line has inductive reactance of 2Ω and 0.2Ω resistance. The generator delivers 90MVA to the infinite bus at 0.8 power factor lagging. For the above conditions, calculate: a. The terminal voltage of the generator b. The equivalent field voltage and power angle c. The real power output at the generator terminals d. The reactive...
3. A 722-MVA, 19-kV steam turbine generator has a per-phase synchronous reactance of 1.3 PU, and...
3. A 722-MVA, 19-kV steam turbine generator has a per-phase synchronous reactance of 1.3 PU, and its internal (excitation) voltage is adjusted to 1.2 PU. The generator is connected to a 19 kV (line) infinite-bus. If the voltage angle (d) between the infinite-bus and the generator internal voltage is 20°, calculate, The generator active power output. The generator line current. Draw the phasor diagram for one phase.
A 3-phase, 1000-MVA, 20-kV, 60-Hz synchronous generator is connected to an infinite bus as shown below. All impedances are given in pu values. The generator delivers 0.9 pu power at unity power factor to the infinite bus whose voltage is at 1 p
A 3-phase, 1000-MVA, \(20-\mathrm{kV}, 60-\mathrm{Hz}\) synchronous generator is connected to an infinite bus as shown below. All impedances are given in pu values. The generator delivers \(0.9\) pu power at unity power factor to the infinite bus whose voltage is at 1 pu.If phase 'A' of circuit 2 (CCT 2) between buses H1 and H2 is suddenly opened at point ' \(\mathrm{F}\) ' near bus H1 due to the opening of a circuit breaker, determine:(a) [10 marks] The internal voltage...
The generator has an internal voltage of 1.5 pu and an inertia constant (H) of 3 MJ/MVA. Determine whether the generator is transiently stable or not if the fault clearing time is 0.15 seconds.
A generator, with a transient reactance of j0.5 pu, delivers 1.0 pu real power to an infinite bus through a transformer and two transmission lines in parallel as shown below. A solid three phase fault occurs at position near “F” which is cleared by opening both ends of the transmission leaving only one line in service.
The generator has an internal voltage of 1.5 pu and an inertia constant (H) of 3 MJ/MVA. Determine whether the generator is transiently stable...
3. A 200 MVA, 20 kV, 60 Hz Y-connected solidly grounded three phase synchronous generator connect...
3. A 200 MVA, 20 kV, 60 Hz Y-connected solidly grounded three phase synchronous generator connected through a 200 MVA 20/138 KV Y-Y transformer to a 138 kV transmission line. The generator reactances to the machine's own base are X-1.10 Both of the transformers Y connections are solidly grounded and its positive, negative and zero sequence series resitances are all 0.10 pu. a. What is the voltage at the terminals of the generator during the sub transient period if a...
1. A three-phase synchronous generator connected to a 345-KV transmission line through a transformer as shown...
1. A three-phase synchronous generator connected to a 345-KV transmission line through a transformer as shown in Figure P1. Parameters of both generator and transformer are given in the figure. Transformer losses and exciting current are neglected. A three-phase short-circuit occurs on the line side of the circuit breaker when the generator is operated at rated terminal voltage and at no-load. The breaker interrupts the fault three cycles after fault inception. Neglect the effect of the transformer on the time...
3. (30) A simple power system, shown below, is made up of a synchronous generatcr connected to a synchronous motor through a couple of transformers and a transmission line. The reactances of the...
3. (30) A simple power system, shown below, is made up of a synchronous generatcr connected to a synchronous motor through a couple of transformers and a transmission line. The reactances of the different elements of the system are all given in pu as: Xsg-0.5 X of each transformer-10 % Xsm-0.5 X transmission line 0.3 The synchronous motor is connected to an infinite bus Hint: The great advantage of an infinite bus is that it always remains constant and our...
Question 2 A 60 Hz synchronous generator with Xd 0.2 pu transient reactance is connected to an infinite us through a transformer and the transmisiones as shown in the Figure. All system reactances are marked on the diagram and are expressed on a common MVA base. The generator dies a power of Auto busbar 1. The magnitude of the generator's excitation voltage e'is 12 pu, and the infinite bus voltage is -1.00u. If a 3-phase fault occurs at the middle...
A synchronous generator is connected to an infinite bus via a transformer and a network of transmission lines, as illustrated in Figure 1 below. Per unit reactances for all elements are shown to a common system base. The generator is delivering 1.1 per unit real power to the infinite bus, and the infinite bus voltage is regulated to 1.05 per unit. The excitation voltage of the synchronous generator is set to 1.30 per unit. The inertia constant of the generator...
A 50 Hz, 250 MVA synchronous generator having inertia constant H=5 MJ/MVA is connected to an infinite bus through transformer and transmission line as shown below. The transformer reactance is based on 500 MVA, while the other impedances are based on the generator MVA Infinite bus 1 2 3 XL 0.1 pu - oto G1 V= 1.0 pu X 0.1 pu Xd = 0.3 pu at 500 MVA The generator is delivering 0.8 of full load current at a power...
3. A 722-MVA, 19-kV steam turbine generator has a per-phase synchronous reactance of 1.3 PU, and its internal (excitation) voltage is adjusted to 1.2 PU. The generator is connected to a 19 kV (line) infinite-bus. If the voltage angle (d) between the infinite-bus and the generator internal voltage is 20°, calculate, The generator active power output. The generator line current. Draw the phasor diagram for one phase.
3. A 200 MVA, 20 kV, 60 Hz Y-connected solidly grounded three phase synchronous generator connected through a 200 MVA 20/138 KV Y-Y transformer to a 138 kV transmission line. The generator reactances to the machine's own base are X-1.10 Both of the transformers Y connections are solidly grounded and its positive, negative and zero sequence series resitances are all 0.10 pu. a. What is the voltage at the terminals of the generator during the sub transient period if a...
1. A three-phase synchronous generator connected to a 345-KV transmission line through a transformer as shown in Figure P1. Parameters of both generator and transformer are given in the figure. Transformer losses and exciting current are neglected. A three-phase short-circuit occurs on the line side of the circuit breaker when the generator is operated at rated terminal voltage and at no-load. The breaker interrupts the fault three cycles after fault inception. Neglect the effect of the transformer on the time...
3. (30) A simple power system, shown below, is made up of a synchronous generatcr connected to a synchronous motor through a couple of transformers and a transmission line. The reactances of the different elements of the system are all given in pu as: Xsg-0.5 X of each transformer-10 % Xsm-0.5 X transmission line 0.3 The synchronous motor is connected to an infinite bus Hint: The great advantage of an infinite bus is that it always remains constant and our...
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