If you are cranking the handle of the generator and the handle suddenly becomes difficult to...
If you are cranking the handle of the generator and the handle suddenly becomes difficult to turn, that indicates an __(1)__ in the current of the circuit. This event could be caused by __(2)__
(1)
a) increase
b) decrease
(2)
a) open
b) short
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If you are cranking the handle of the generator and the handle
suddenly becomes difficult to...
Problem 2: If a PV array has a maximum power output of 10 watts under irradiance level of 600 W/m...
sustainable energy
Problem 2: If a PV array has a maximum power output of 10 watts under irradiance level of 600 W/m2 a. What must the irradiance be to achieve a power output of 17 watts? b. Would you expect the open circuit voltage to increase or decrease? c. Would you expect the short circuit current to increase or decrease?
Problem 2: If a PV array has a maximum power output of 10 watts under irradiance level of 600 W/m2...
09C6 p.): The Open Circuit and the Short Circuit characteristics of a 14.1-KV 30-MVA synchronous generator...
09C6 p.): The Open Circuit and the Short Circuit characteristics of a 14.1-KV 30-MVA synchronous generator are given in the tables shown. Calculate (a) the unsaturated synchronous reactance, (b) the saturated synchronous reactance. Open-circuit test Field current, A Line voltage, KV Extrapolated air gap voltage, KV Short-circuit test Field current, A Armature current, A 275 12.2 1 3.3 320 13.0 15.4 365 13.8 17.5 380 14.1 18. 3 475 | 15.2 22.8 570 16.0 27.4 275320365 890 1040 1190 380...
Please answer question 4 with the graph and info given below the problem statement. Thank you : ) 4. Assume that the generator field current is adjusted to supply 480 V under rated condi- tions. Wha...
Please answer question 4 with the graph and info given below the
problem statement. Thank you : )
4. Assume that the generator field current is adjusted to supply 480 V under rated condi- tions. What is the static stability limit of this generator? (Note: You may ignore RA to make this calculation easier.) How close is the full-load condition of this generator to the static stability limit? Problems 2 to 4 refer to a four-pole, Y-connected synchronous generator rated...
You can use any software of your choice Begin by connecting the waveform generator to the...
You can use any software of your choice
Begin by connecting the waveform generator to the series combination of a 0.2uF capacitor (use a decade capacitor box) and a 1 ks resistor (use a decade resistor box). Generate a 500 Hz, 8 Vp- p square wave with a 4 Volt offset and observe this waveform on the oscilloscope's Channel 1. Monitor the voltage drop across the capacitor on Channel 2. Figure 1 shows the schematic for the RC circuit 1k...
1. A three-phase 50 Hz. generator is driven at constant speed. its per unit reactances and...
1. A three-phase 50 Hz. generator is driven at constant speed. its per unit reactances and time constants are below: X": = 0,15 pu t": = 0,03 sec X'= 0,25 pu tt = 1,2 sec Xo = 1.10 pu Ta = 0,4 sec The generator windings are initially open-circuited and field voltage is adjusted to the rated value of generator terminal voltage. The generator is subjected to a symmetrical three-phase short circuit at the when ot/2. Obtain the asymmetrical waveform...
1. A three-phase 50 Hz. generator is driven at constant speed. its per unit reactances and...
1. A three-phase 50 Hz. generator is driven at constant speed. its per unit reactances and time constants are below: X": = 0,15 pu t": = 0,03 sec X'= 0,25 pu tt = 1,2 sec Xo = 1.10 pu Ta = 0,4 sec The generator windings are initially open-circuited and field voltage is adjusted to the rated value of generator terminal voltage. The generator is subjected to a symmetrical three-phase short circuit at the when ot/2. Obtain the asymmetrical waveform...
Could you please help solve this question. The following generator supplying rated load into a large...
Could you please help solve this question.
The following generator supplying rated load into a large grid at rated voltage (11kV) and 0.85 PF lagging Generator: 20 MVA, X = j15%. Voltage 11kV i) Determine the internal generator voltage. ii) The load suddenly drops to 50% rated power. If the rotating energy of the generator and its associated turbine is 2.0 p.u-seconds when running at its synchronous speed. It has 2 poles and system frequency is 50 Hz. Determine: (ii-a)...
Shown in Figure 1(a) is a separately excited generator. It is known that Rf-250, Ra- 10 Ω, v,-100...
shown in Figure 1(a) is a separately excited generator. It is known that Rf-250, Ra- 10 Ω, v,-100 V, and ahn-100 rad/s. The magnetization curve of the machine is shown in Figure 1(b). when (1) Assume that the generator is driven to Wm-150 rad/s by a prime mover. Find the generator has no load (i.e., the voltage generated by the generator in the case of open circuit) (2) Find Va when the generator is driven to am-150 rad/s and is...
13. Determine the following changes as source of cash or use of cash: (1p each, total...
13. Determine the following changes as source of cash or use of cash: (1p each, total 4p) Change Source of cash Use of cash Increase in Inventory Decrease in Accounts Payable Decrease in Plant & Equipment Increase in Common Stock 14. When testing a company's ability to meet short term liabilities, which ratio should you regard, if; (5p) a. the company has out of fashion inventories difficult to liquidate in a short time with a reasonable loss and b. the...
1.1 Preliminary design: Signal generator a. Modify your signal source as shown in the circuit below....
1.1 Preliminary design: Signal generator a. Modify your signal source as shown in the circuit below. The normal 50 output impedance of the signal generator is insignificant compared to the 30 k resistor and can be ignored. 30 k 2k Vag 1000 b. Your modified signal source can be represented by the Thevenin equivalent circuit shown here. Determine the value of Rr that R Th ww applies to the previous circuit. Your answer need be good to only 10%; after...
sustainable energy
Problem 2: If a PV array has a maximum power output of 10 watts under irradiance level of 600 W/m2 a. What must the irradiance be to achieve a power output of 17 watts? b. Would you expect the open circuit voltage to increase or decrease? c. Would you expect the short circuit current to increase or decrease?
Problem 2: If a PV array has a maximum power output of 10 watts under irradiance level of 600 W/m2...
09C6 p.): The Open Circuit and the Short Circuit characteristics of a 14.1-KV 30-MVA synchronous generator are given in the tables shown. Calculate (a) the unsaturated synchronous reactance, (b) the saturated synchronous reactance. Open-circuit test Field current, A Line voltage, KV Extrapolated air gap voltage, KV Short-circuit test Field current, A Armature current, A 275 12.2 1 3.3 320 13.0 15.4 365 13.8 17.5 380 14.1 18. 3 475 | 15.2 22.8 570 16.0 27.4 275320365 890 1040 1190 380...
Please answer question 4 with the graph and info given below the
problem statement. Thank you : )
4. Assume that the generator field current is adjusted to supply 480 V under rated condi- tions. What is the static stability limit of this generator? (Note: You may ignore RA to make this calculation easier.) How close is the full-load condition of this generator to the static stability limit? Problems 2 to 4 refer to a four-pole, Y-connected synchronous generator rated...
You can use any software of your choice
Begin by connecting the waveform generator to the series combination of a 0.2uF capacitor (use a decade capacitor box) and a 1 ks resistor (use a decade resistor box). Generate a 500 Hz, 8 Vp- p square wave with a 4 Volt offset and observe this waveform on the oscilloscope's Channel 1. Monitor the voltage drop across the capacitor on Channel 2. Figure 1 shows the schematic for the RC circuit 1k...
1. A three-phase 50 Hz. generator is driven at constant speed. its per unit reactances and time constants are below: X": = 0,15 pu t": = 0,03 sec X'= 0,25 pu tt = 1,2 sec Xo = 1.10 pu Ta = 0,4 sec The generator windings are initially open-circuited and field voltage is adjusted to the rated value of generator terminal voltage. The generator is subjected to a symmetrical three-phase short circuit at the when ot/2. Obtain the asymmetrical waveform...
1. A three-phase 50 Hz. generator is driven at constant speed. its per unit reactances and time constants are below: X": = 0,15 pu t": = 0,03 sec X'= 0,25 pu tt = 1,2 sec Xo = 1.10 pu Ta = 0,4 sec The generator windings are initially open-circuited and field voltage is adjusted to the rated value of generator terminal voltage. The generator is subjected to a symmetrical three-phase short circuit at the when ot/2. Obtain the asymmetrical waveform...
Could you please help solve this question.
The following generator supplying rated load into a large grid at rated voltage (11kV) and 0.85 PF lagging Generator: 20 MVA, X = j15%. Voltage 11kV i) Determine the internal generator voltage. ii) The load suddenly drops to 50% rated power. If the rotating energy of the generator and its associated turbine is 2.0 p.u-seconds when running at its synchronous speed. It has 2 poles and system frequency is 50 Hz. Determine: (ii-a)...
shown in Figure 1(a) is a separately excited generator. It is known that Rf-250, Ra- 10 Ω, v,-100 V, and ahn-100 rad/s. The magnetization curve of the machine is shown in Figure 1(b). when (1) Assume that the generator is driven to Wm-150 rad/s by a prime mover. Find the generator has no load (i.e., the voltage generated by the generator in the case of open circuit) (2) Find Va when the generator is driven to am-150 rad/s and is...
13. Determine the following changes as source of cash or use of cash: (1p each, total 4p) Change Source of cash Use of cash Increase in Inventory Decrease in Accounts Payable Decrease in Plant & Equipment Increase in Common Stock 14. When testing a company's ability to meet short term liabilities, which ratio should you regard, if; (5p) a. the company has out of fashion inventories difficult to liquidate in a short time with a reasonable loss and b. the...
1.1 Preliminary design: Signal generator a. Modify your signal source as shown in the circuit below. The normal 50 output impedance of the signal generator is insignificant compared to the 30 k resistor and can be ignored. 30 k 2k Vag 1000 b. Your modified signal source can be represented by the Thevenin equivalent circuit shown here. Determine the value of Rr that R Th ww applies to the previous circuit. Your answer need be good to only 10%; after...
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