Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN: 9781305632134
Author: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher: Cengage Learning
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Chapter 9, Problem 9.4P
In Problem 9.1 and Figure 9.17, let 765 kV be replaced by 500 kV, keeping the rest of the data to be the same. Repeat (a) Problems 9.1, (b) 9.2, and (c) 9.3.
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Power System Analysis and Design (MindTap Course List)
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- To convert a per-unit impedance from old to new base values, the equation to be used is Zp.u.new=Zp.u.old(VbaseoldVbasenew)2(SbasenewSbaseold)Zp.u.new=Zp.u.old(VbaseoldVbasenew)2(SbasenewSbaseold)Zp.u.new=Zp.u.old(VbaseoldVbasenew)2(SbasenewSbaseold)arrow_forwardDiscuss the role of FACTS (Flexible Alternating Current Transmission Systems) devices in power system control and optimization.arrow_forwardThe one-line diagram of a simple three-bus power system is shown in Figure 9.1. Each generator is represented by an emf behind the transient reactance. All impedances are expressed in per unit on a common 100 MVA base, and for sim- plicity, resistances are neglected. The following assumptions are made. (i) Shunt capacitances are neglected and the system is considered on no-load. (ii) All generators are running at their rated voltage and rated frequency with their emfs in phase. Determine the fault current, the bus voltages, and the line currents during the fault when a balanced three-phase fault with a fault impedance Zf = 0.16 per unit %3D occurs on Bus 3.arrow_forward
- Explore the concept of phasor measurement units (PMUs) and their significance in real-time monitoring and control of power systems. How do they enhance grid reliability?arrow_forwardDescribe the concept of power system harmonics and their impact on the quality of electrical supply.arrow_forwardDerive an expression of per unit impedance of a given base MVA and base KV in term of new base MVA and new base KVAarrow_forward
- Q2. Figure Q2 shows the single-line diagram. The scheduled loads at buses 2 and 3 are as marked on the diagram. Line impedances are marked in per unit on 100 MVA base and the line charging susceptances are neglected. a) Using Gauss-Seidel Method, determine the phasor values of the voltage at load bus 2 and 3 according to second iteration results. b) Find slack bus real and reactive power according to second iteration results. c) Determine line flows and line losses according to second iteration results. d) Construct a power flow according to second iteration results. Slack Bus = 1.04.20° 0.025+j0.045 0.015+j0.035 0.012+j0,03 3 |2 134.8 MW 251.9 MW 42.5 MVAR 108.6 MVARarrow_forward6. For a three bus power system assume bus 1 is the swing with a per unit voltage of 1.020 , bus 2 is a PQ bus with a per unit load of 2.0 + j0:5, and bus 3 is a PV bus with 1.0 per unit generation and a 1.0 voltage setpoint. The per unit line impedances are j0.1 between buses 1 and 2, j0.4 between buses 1 and 3, and j0.2 between buses 2 and 3. Using a flat start, use the Newton-Raphson approach to determine the first iteration phasor voltages at buses 2 and 3.arrow_forward10.a. Most of the power transformers that you will find in commercial and industrial applications are either three-phase orA. two-phaseB. single-phaseC. zero-phaseD. four-phase10.b. The percent regulation for a transformer whose secondary voltage goes from 150 V at no load to 140 V at full load isA. 10.7%B. 9.3%C. 6.7%D. 7.1%10.c. Three single-phase transformers are connected in ∆ - ∆. Each of these transformers has a secondary phase current of 10 A. The value of the secondary line current isA. 578 AB. 17.3 AC. 57.8 AD. 1.73 Aarrow_forward
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