Problem 2 (a) Apply nodal analysis to evaluate the voltages at A and B. (b) Evaluate the power delivered by each source, and the total delivered power 20 10 B A. 20
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Q: 2i, 50 4 V
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- With generator conyention, where the current leaves the positive terminal of the circuit element, if P is positive then positive real power is delivered. (a) False (b) TrueA minimum of three wattemer should be used to measure power for a three phase balanced system. True FalseWhat is the total three-phase real power drawn by the two loads? Express your answer in Megawatts. Note that the power solved in the single-phase equivalent circuit is the power for a single-phase only.
- A short line having an impedance of (2 + j3) ohm interconnects two power stations A and B both operating at 11kV equal in magnitude and phase. To transfer 25 MW at 0.8 power factor lagging from A to B determine the voltage drop must be compensated by the booster so that the voltages are maintain the same at both ends.2.1 Two power stations, A and B, are synchronized at 66 kV. They are inter-connected by a transmission line with an inductive reactance of 6.7-Ω and resistance of 3.5-Ω per phase. The voltage of power station A is advanced with an angle of 10.5 degrees with respect to the voltage of power station B. The loading of power station B has a real power of 200 MW. The respective loads of the two power stations are as follows: Power station A: 165 MVA at a power factor of 0.819 lagging. Power station B: The reactive power consumed by the load is 155 Mvar. *Round off to two decimal places to every question 15.The active power loss within the interconnector (MW). 16.The reactive power loss within the interconnector (MVar). 17.The final loading of power station A (MVA) and it's angle2.1 Two power stations, A and B, are synchronized at 66 kV. They are inter-connected by a transmission line with an inductive reactance of 6.7-Ω and resistance of 3.5-Ω per phase. The voltage of power station A is advanced with an angle of 10.5 degrees with respect to the voltage of power station B. The loading of power station B has a real power of 200 MW. The respective loads of the two power stations are as follows:Power station A: 165 MVA at a power factor of 0.819 lagging.Power station B: The reactive power consumed by the load is 155 Mvar. *Round off to two decimal places to every question 18.The final loading of power station B (MVA) and it's angle 19.The reactive power received by power station A if the reactive power loading from power station A is to be reduced by 30% (MVar). 20.The required advancement angle at power station A to achieve the 30% reduction in reactive power loading of power station A (degrees).
- 2.1 Two power stations, A and B, are synchronized at 66 kV. They are inter-connected by a transmission line with an inductive reactance of 6.7-Ω and resistance of 3.5-Ω per phase. The voltage of power station A is advanced with an angle of 10.5 degrees with respect to the voltage of power station B. The loading of power station B has a real power of 200 MW. The respective loads of the two power stations are as follows: Power station A: 165 MVA at a power factor of 0.819 lagging. Power station B: The reactive power consumed by the load is 155 Mvar. *Round off to two decimal places in every question. Determine the following: 12.The interconnector current (kA)and it's angle 13.The reactive power received by power station A (MVar). 14.The active power received by power station B (MW).In a three phase overhead system , each line is suspended by a string of three insulators. The voltages across top unit and the middle unit are 8KV and 11KV respectively. Calculate a) ratio of shunt capacitance to self capacitance b) line voltage c) string efficiency.a) Find the ICA load current.b) Give the line voltage Vab.c) Calculate the total complex power on voltage sources.
- Derive conditions for economics dispatch when generating stations are connected in parallelIn a three phase overhead system , each line is suspended by a string of three insulator. The voltages across top unit and the middle unit are 8KV and 11KV respectively. Calculate a) ratio of shunt capacitance to self capacitance b) line voltage c) string efficiency6) The neutral current in a balanced Y-Y connected three-phase system is equal to zero True False