Power System Analysis & Design
6th Edition
ISBN: 9781305636187
Author: Glover, J. Duncan, Overbye, Thomas J. (thomas Jeffrey), Sarma, Mulukutla S.
Publisher: Cengage Learning,
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Chapter 2, Problem 2.50P
Consider the balanced three-phase system shown in Figure 2.34. Deter mine
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Chapter 2 Solutions
Power System Analysis & Design
Ch. 2 - The rms value of v(t)=Vmaxcos(t+) is given by a....Ch. 2 - If the rms phasor of a voltage is given by V=12060...Ch. 2 - If a phasor representation of a current is given...Ch. 2 - Prob. 2.4MCQCh. 2 - Prob. 2.5MCQCh. 2 - Prob. 2.6MCQCh. 2 - Prob. 2.7MCQCh. 2 - Prob. 2.8MCQCh. 2 - Prob. 2.9MCQCh. 2 - The average value of a double-frequency sinusoid,...
Ch. 2 - The power factor for an inductive circuit (R-L...Ch. 2 - The power factor for a capacitive circuit (R-C...Ch. 2 - Prob. 2.13MCQCh. 2 - The instantaneous power absorbed by the load in a...Ch. 2 - Prob. 2.15MCQCh. 2 - With generator conyention, where the current...Ch. 2 - Consider the load convention that is used for the...Ch. 2 - Prob. 2.18MCQCh. 2 - The admittance of the impedance j12 is given by...Ch. 2 - Consider Figure 2.9 of the text, Let the nodal...Ch. 2 - The three-phase source line-to-neutral voltages...Ch. 2 - In a balanced three-phase Y-connected system with...Ch. 2 - In a balanced system, the phasor sum of the...Ch. 2 - Consider a three-phase Y-connected source feeding...Ch. 2 - For a balanced- load supplied by a balanced...Ch. 2 - A balanced -load can be converted to an...Ch. 2 - When working with balanced three-phase circuits,...Ch. 2 - The total instantaneous power delivered by a...Ch. 2 - The total instantaneous power absorbed by a...Ch. 2 - Under balanced operating conditions, consider the...Ch. 2 - One advantage of balanced three-phase systems over...Ch. 2 - While the instantaneous electric power delivered...Ch. 2 - Given the complex numbers A1=630 and A2=4+j5, (a)...Ch. 2 - Convert the following instantaneous currents to...Ch. 2 - The instantaneous voltage across a circuit element...Ch. 2 - For the single-phase circuit shown in Figure...Ch. 2 - A 60Hz, single-phase source with V=27730 volts is...Ch. 2 - (a) Transform v(t)=75cos(377t15) to phasor form....Ch. 2 - Let a 100V sinusoidal source be connected to a...Ch. 2 - Consider the circuit shown in Figure 2.23 in time...Ch. 2 - For the circuit shown in Figure 2.24, compute the...Ch. 2 - For the circuit element of Problem 2.3, calculate...Ch. 2 - Prob. 2.11PCh. 2 - The voltage v(t)=359.3cos(t)volts is applied to a...Ch. 2 - Prob. 2.13PCh. 2 - A single-phase source is applied to a...Ch. 2 - Let a voltage source v(t)=4cos(t+60) be connected...Ch. 2 - A single-phase, 120V(rms),60Hz source supplies...Ch. 2 - Consider a load impedance of Z=jwL connected to a...Ch. 2 - Let a series RLC network be connected to a source...Ch. 2 - Consider a single-phase load with an applied...Ch. 2 - A circuit consists of two impedances, Z1=2030 and...Ch. 2 - An industrial plant consisting primarily of...Ch. 2 - The real power delivered by a source to two...Ch. 2 - A single-phase source has a terminal voltage...Ch. 2 - A source supplies power to the following three...Ch. 2 - Consider the series RLC circuit of Problem 2.7 and...Ch. 2 - A small manufacturing plant is located 2 km down a...Ch. 2 - An industrial load consisting of a bank of...Ch. 2 - Three loads are connected in parallel across a...Ch. 2 - Prob. 2.29PCh. 2 - Figure 2.26 shows three loads connected in...Ch. 2 - Consider two interconnected voltage sources...Ch. 2 - Prob. 2.35PCh. 2 - Prob. 2.36PCh. 2 - Prob. 2.37PCh. 2 - Prob. 2.38PCh. 2 - Prob. 2.39PCh. 2 - A balanced three-phase 240-V source supplies a...Ch. 2 - Prob. 2.41PCh. 2 - A balanced -connected impedance load with (12+j9)...Ch. 2 - A three-phase line, which has an impedance of...Ch. 2 - Two balanced three-phase loads that are connected...Ch. 2 - Two balanced Y-connected loads, one drawing 10 kW...Ch. 2 - Three identical impedances Z=3030 are connected in...Ch. 2 - Two three-phase generators supply a three-phase...Ch. 2 - Prob. 2.48PCh. 2 - Figure 2.33 gives the general -Y transformation....Ch. 2 - Consider the balanced three-phase system shown in...Ch. 2 - A three-phase line with an impedance of...Ch. 2 - A balanced three-phase load is connected to a...Ch. 2 - What is a microgrid?Ch. 2 - What are the benefits of microgrids?Ch. 2 - Prob. CCSQCh. 2 - Prob. DCSQ
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- Charge carrier concentration in doped semiconductor: compensation n = Na - Na Na - Na >> ni n-type p = n₁²/n 2 if N₂ >> N₁, n = N₁_ and _p=n² / Na d p = Na-Nd p-type Na-Na >> n₁ d 2 n = n₁₂²/p 2 if N₁ >> N₁, p = N₁ and n = n² / Na a n-type Dopant compensation: Examples d n = Na-N₁ = 4×10¹ cm¯ -3 ++++++ n = 4×1016 cm-³ N=6×1016 cm-3 p=n/n=1020/4×1016 = 2.5×10³ cm p-type -3 p=Na-N₁ =8×10 −6×1016 = 2×10¹6 cm³ n=n²/p=1020/2×101 =5×10³ cm³ N2×1016 cm³ ++++++ N=6x1016 cm-3 N = 8×1016 cm-3 p=2×1016 cm³ The resulting charge carrier concentration in compensated semiconductor approximately equals the difference between the donor and acceptor concentrations. Charge carrier concentration in n-type and p-type semiconductors 1. Calculate concentrations of electrons and holes at room temperature in Si containing 2x1017 cm³ of donors and 8x1016 -3 cm³ of acceptors. Assume that Na, Nd >> n;. αν 2. Calculate concentrations of electrons and holes at room temperature in Ge containing 2x10¹7 cm³ of…arrow_forwardlonization energy of dopants in semiconductors lonization energy of shallow donors and acceptors can be evaluated using hydrogenic model: lonization energy E Hion and orbital radius a, of hydrogen atom Hydrogen Atom moe4 EHion = 13.6 eV a = 8ε²h² Απερη mee² = 5.2918 x 10-11 m lonization energy Eion and orbital radius D,A of donors and acceptors electron m* e4 Eion = ~50 meV 8K² &²h² 4πεερη2 "D,A 1 nm m*e² Orbit of an electron bound to a donor in a semiconductor crystal. Energy levels of donors and acceptors Conduction Band ↓ Ec -Ed Donor Level Donor ionization energy Acceptor ionization energy Acceptor Level Εα Ev Valence Band Ionization energy of selected donors and acceptors in silicon Donors Acceptors Dopant Sb P As B Al In Ionization energy, Ec-Ed or Ea-E, (meV) 39 44 54 45 57 160 Hydrogenic model of donors and acceptors Calculate the ionization energies and orbit radii of donors and acceptors in Si and Ge. Dielectric constant of silicon is k = 11.7. Dielectric constant of…arrow_forwardI need help in construct a method in matlab to find the voltage of VR1 to VR4, rhe current, and the power base on that circuit Nominal or Theortical: E1 = 3V , E2 = 9V, E3 = 1.5V R1 =10Kohm, R2 =2Kohm, R3 =1Kohm, R4 =16Kohmarrow_forward
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