1)The sending-end current and receiving-end current in a given transmission line are not equal due to:a. Transmission line resistanceb. Transmission line inductanceb. Transmission line inductanced. Transmission line voltage2The phase voltage is equal to the line-to-line voltage in a delta connected 3-Fphase generator.3The DC method is suitable for heavily loaded power system.F4The current leads the voltage in Inductive loads.TF5Power flow studies are useful in planning future expansion of power system.F6Capacitors are used to adjust power factor in power systems.TF7Newton's method is not sensitive to initial solution choice.TF8Steel is used transmission lines because of its high electrical conductivity.TF9Step up transformers are used to reduce power loss in transmission lines.FThe Jacobian matrix elements are computed at every iteration of the fastdecoupled method.Power utility companies make more money selling active power.10F11F12Transformers are used in DC power systems.TF

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1)The sending-end current and receiving-end current in a given transmission line are not equal b. Transmission line inductance a. Transmission line resistance b. Transmission line inductance d. Transmission line voltage 2. The phase voltage is equal to the line-to-line voltage in a delta connected 3- T

1)The sending-end current and receiving-end current in a given transmission line are not equal b. Transmission line inductance a. Transmission line resistance b. Transmission line inductance d. Transmission line voltage 2. The phase voltage is equal to the line-to-line voltage in a delta connected 3- T

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.52P: A balanced three-phase load is connected to a 4.16-kV, three-phase, fourwire, grounded-wye dedicated...

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A balanced three-phase load is connected to a 4.16-kV, three-phase, fourwire, grounded-wye dedicated distribution feeder. The load can be mode led by an impedance of ZL=(4.7+j9)/phase, wye-connected. The impedance of the phase conductors is (0.3+j1). Determine the following by using the phase A to neutral voltage as a reference and assume positive phase sequence: (a) Line currents for phases A, B, and C. (b) Line-to-neutral voltages for all three phases at the load. (c) Apparent. active, and reactive power dissipated per phase, and for all three phases in the load. (d) Active power losses per phase and for all three phases in the phase conductors.
While the instantaneous electric power delivered by a single-phase generator under balanced steady-state conditions is a function of time havi ng two components of a constant and a double-frequency sinusoid, the total instantaneous electric power delivered by a three-phase generator under balanced steady-state conditions is a constant. (a) True (b) False
Determine the bus admittance matrix (Ybus) for the three-phase power system shown in Figure 6.23 with input data given in Table 6.11 and partial results in Table 6.12. Assume a three-phase 100 MVA per unit base. TABLE 6.11 Bus input data for Problem 6.20 TABLE 6.12 Partially Completed Bus Admittance Matrix (Ybus) for Problem 6.30
a) Discus why the transmission systems are mostly overhead systems. b) Discuss why all overhead lines use ACSR conductors. c) Discuss why at 400 kV and above the transmission lines have bundled conductors. d) How do the various devices protect the penstock? e) Discuss why the transmission lines are 3 phase 3 wire circuits while secondary distribution lines are 3 phase 4 wire circuits. f) At which places the diesel power stations are finding favor? Why? g) How do voids in the insulation cause breakdown of the cable? h) What is the function of condenser in steam power plant?
The annual load duration curve of a power supply system may be considered as straight line from 40 MW to 8 MW. The load factor of the system is ?
Assuming the voltage at the utility bus is 13.5 kV and the PV plant supplies 4.8 MW of power at 0.95 power factor lagging. Draw the diagram of the system and determine i) the per-phase voltage and current at the POI at the PV plant ii) the reactive power delivered and that which is lost in the line. Assume the line is modelled as a short line.
Shown are two buses connected via a transmission line. Connected to Bus 1 is a generator(modelled as a voltage source V1), and to Bus 2 is a generator( with Voltage V2) and a load. The line impedance Z = R + jX is not known. Three-phase load is forecasted as 100MW + 60MVar. Generator at Bus 2 is scheduled to deliver 40MW and its excitation is adjusted for the machine to deliver 55 MVar. Voltage at Bus 1 is 241 KV angle 10 deg, while voltage at bus is 230 kV; use V2 as the reference for all angles. 1. What is the current (RMS) in amperes drawn by the load connected to Bus 2? 2. How much real power (in MW) is delivered by the generator connected to Bus 1? 3. What is the total real power loss along the line, in percent of the load? 4. What is the X/R Ratio of the line impedance?
a)Find the IAB load current? b)Find the VBE line voltage? c)Calculate the total complex power on loads?
Power Transmission and Distribution Discuss the advantages and disadvantages of single-phase and three-phase system
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4) State the relation between line and phase values of voltage and current for 3-pha se DELTA connected load .state the equation for active, reactive power consumed by 3-phase load.
he node (busbar) and branch (line) data of a power system are provided in Table Q1.1 and Table Q1.2 respectively. All values in the tables are stated in per unit (p.u.). Using node 1 (busbar 1) as the reference (slack bus), calculate the line flows using the DC power flow method.