for unbalanced load on bus voltages ad branch currents, will voltage or current show more significant...
for unbalanced load on bus voltages ad branch currents, will voltage or current show more significant unbalance? Why?
Homework Answers
- Mainly the unbalanced load can be three phase system or load in which the voltage or current show more significant unbalance because of below following reasons.
- If the three phase load is motor then the mechnical stresses due to less torque than normal output.
- Higher current in the load.
- Because of higher unbalaance current in the load the unbalance voltage in the system increased.
- Torque pulsation increases
- Increase of vibration
- increase losses
- Overheating of load
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for unbalanced load on bus voltages ad branch currents, will
voltage or current show more significant...
5 Three Type B step-voltage regulators are connected in wye and located 7. on the secondary bus o...
5 Three Type B step-voltage regulators are connected in wye and located 7. on the secondary bus of a 12.47kV substation. The feeder is serving an unbalanced load. A power-flow study has been run and the voltages at the substation and the load center node are 7200/0 Vsubabc 7200/-120 V 7200/120 6890.6/-1.49 6990.5/117.05 VLCabel 6825.9/-122.90 v The currents at the substation are 362.8/-27.3 ]-395.4/-154.7 A abc 329.0/98.9 The regulator potential transformer ratio is 7200-120 and the current transformer ratio is...
help find those answers please 10) In a certain A-connected balanced load, the line voltages are...
help find those answers please
10) In a certain A-connected balanced load, the line voltages are 230 V and the impedances are 60 35 2. Determine the magnitude of the phase currents A) 1.63 A B) 2.78 A C) 3.83 A D) 4.15 A 11) In a certain Δ-connected balanced load, with line voltages of 230 V and impedances of 60 L35Ώ, determine the total power A) 920.2 W B) 2346.3 W C) 1572.9 w D) 1250.9 W 12) For...
3. A 12.47 kV feeder provides service to an unbalanced wye-connected load specified to be: Phase ...
Response: Me neither :/
3. A 12.47 kV feeder provides service to an unbalanced wye-connected load specified to be: Phase a: 1000 kVA, 0.9 lagging power factor Phase b: 800 kVA, 0.95 lagging power factor Phase c: 1100 kVA, 0.85 lagging power factor a) Compute the initial load currents assuming that 60% of the load is complex power, 25% constant current, and 15% constant impedance. b) Determine the currents at the start of the second iteration if the load voltages...
If the reactive power consumption for a load bus in increased, which quantity would be more...
If the reactive power consumption for a load bus in increased, which quantity would be more susceptible to this change; voltage angle or voltage magnitude? Why?
symmetrical three phase fault at bus 4 the fault current the bus voltages all the line...
symmetrical three phase fault at bus 4
the fault current
the bus voltages all
the line currents all
find y bus
ysy ews in fhe Figune 1,gven the per unit bus impedance matri 20 240 0140 0200 0200 a140 02275 0175 0175 Zp 200 G175 0310 0310 0200 0175 0310 0500 20 050 N2 Condinut the yusmai hee feut sccurs at bus 4 at no lead, find The fault current 2 The bus tages and 3The line carent 1during fault...
Q2. (a) A Y-connected voltage source has the following unbalanced voltages: V, = 177210": V, =...
Q2. (a) A Y-connected voltage source has the following unbalanced voltages: V, = 177210": V, = 1 562-100° ; V-10522201 Obtain the symmetrical components of voltages (b) The symmetrical components of a phase current are given below in per unit L,1) 0.8-j2.6 perunit I.0per unit 3. per unit Obtain the phase current Ia, Ib, Ie
Qustion 2.120 marks) a) Figure I below shows a system with plant-I and plant-2 connected to bus-1 and bus-2 respectively. There are two loads and 3 branches. The bus-I is the reference bus with 1...
Qustion 2.120 marks) a) Figure I below shows a system with plant-I and plant-2 connected to bus-1 and bus-2 respectively. There are two loads and 3 branches. The bus-I is the reference bus with 1.040° pu voltage. Base MVA is 100 If the branch currents and branch impedance values are as follows -2.5-j0.50pu -2-j040 pu I 1.5-j0.3 pu Calculate: 7-0.05+j0.20 pu -0.02+j0.08 pu Z 0.025+j0.10 pu i. Current distribution factors (4 marks) ii. Power factor angles at bus 1 and...
answers are written there. Please show how the currents and voltage phasors are related. Th 8.66...
answers are written there. Please show how the
currents and voltage phasors are related.
Th 8.66 +js Ω, ZBC 10 + jo Ω, ZCA 0-j10 Ω, constitute a delta connected load on a balanced 3 phase system of voltages of CBA phase sequence where e impedances, LAB = VAB 86.6 + j50 V. Determine the three phase currents and the three line currents. 10A, 10 A, lOA OA, 19.3A, 19.3A
Derive the expressions of the average and rms values of the load voltage and current in...
Derive the expressions of the average and rms values of the load voltage and current in three-phase uncontrolled bridge rectifiers with resistive load. Draw the waveforms of supply voltage (line-line voltages), transformer phase current (only one phase), load voltage, load current and diode current.
For the problems below. Show a sketch clearly labeling all of the voltages and currents, and...
For the problems below. Show a sketch clearly labeling all of the voltages and currents, and determine the governing differential equation as indicated. 2. For the system below, find the governing differential equation for the output voltage across inductance L in terms of the input V
5 Three Type B step-voltage regulators are connected in wye and located 7. on the secondary bus of a 12.47kV substation. The feeder is serving an unbalanced load. A power-flow study has been run and the voltages at the substation and the load center node are 7200/0 Vsubabc 7200/-120 V 7200/120 6890.6/-1.49 6990.5/117.05 VLCabel 6825.9/-122.90 v The currents at the substation are 362.8/-27.3 ]-395.4/-154.7 A abc 329.0/98.9 The regulator potential transformer ratio is 7200-120 and the current transformer ratio is...
help find those answers please
10) In a certain A-connected balanced load, the line voltages are 230 V and the impedances are 60 35 2. Determine the magnitude of the phase currents A) 1.63 A B) 2.78 A C) 3.83 A D) 4.15 A 11) In a certain Δ-connected balanced load, with line voltages of 230 V and impedances of 60 L35Ώ, determine the total power A) 920.2 W B) 2346.3 W C) 1572.9 w D) 1250.9 W 12) For...
Response: Me neither :/
3. A 12.47 kV feeder provides service to an unbalanced wye-connected load specified to be: Phase a: 1000 kVA, 0.9 lagging power factor Phase b: 800 kVA, 0.95 lagging power factor Phase c: 1100 kVA, 0.85 lagging power factor a) Compute the initial load currents assuming that 60% of the load is complex power, 25% constant current, and 15% constant impedance. b) Determine the currents at the start of the second iteration if the load voltages...
symmetrical three phase fault at bus 4
the fault current
the bus voltages all
the line currents all
find y bus
ysy ews in fhe Figune 1,gven the per unit bus impedance matri 20 240 0140 0200 0200 a140 02275 0175 0175 Zp 200 G175 0310 0310 0200 0175 0310 0500 20 050 N2 Condinut the yusmai hee feut sccurs at bus 4 at no lead, find The fault current 2 The bus tages and 3The line carent 1during fault...
Q2. (a) A Y-connected voltage source has the following unbalanced voltages: V, = 177210": V, = 1 562-100° ; V-10522201 Obtain the symmetrical components of voltages (b) The symmetrical components of a phase current are given below in per unit L,1) 0.8-j2.6 perunit I.0per unit 3. per unit Obtain the phase current Ia, Ib, Ie
Qustion 2.120 marks) a) Figure I below shows a system with plant-I and plant-2 connected to bus-1 and bus-2 respectively. There are two loads and 3 branches. The bus-I is the reference bus with 1.040° pu voltage. Base MVA is 100 If the branch currents and branch impedance values are as follows -2.5-j0.50pu -2-j040 pu I 1.5-j0.3 pu Calculate: 7-0.05+j0.20 pu -0.02+j0.08 pu Z 0.025+j0.10 pu i. Current distribution factors (4 marks) ii. Power factor angles at bus 1 and...
answers are written there. Please show how the
currents and voltage phasors are related.
Th 8.66 +js Ω, ZBC 10 + jo Ω, ZCA 0-j10 Ω, constitute a delta connected load on a balanced 3 phase system of voltages of CBA phase sequence where e impedances, LAB = VAB 86.6 + j50 V. Determine the three phase currents and the three line currents. 10A, 10 A, lOA OA, 19.3A, 19.3A
For the problems below. Show a sketch clearly labeling all of the voltages and currents, and determine the governing differential equation as indicated. 2. For the system below, find the governing differential equation for the output voltage across inductance L in terms of the input V
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