A-Two impedances Z, and Zz are connected in parallel and the combination is connecting with series to third one. If the applied voltage is 100 with zero phase, Z, = 3 + j5 ohm, Z; = 2 +j3 ohm and the total impedance is equal to 7.34 +j 4.55 ohm, find: 1- Z2 2- Total current 3- Current through Z2 4- Current through Z3

A-Two impedances Z, and Zz are connected in parallel and the combination is connecting with series to third one. If the applied voltage is 100 with zero phase, Z, = 3 + j5 ohm, Z; = 2 +j3 ohm and the total impedance is equal to 7.34 +j 4.55 ohm, find: 1- Z2 2- Total current 3- Current through Z2 4- Current through Z3

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 2.45P: Two balanced Y-connected loads, one drawing 10 kW at 0.8 power factor lagging and the other IS kW at...

See similar textbooks

Similar questions

1. Three impedances Z1, Z2 and Z3 are delta-connected to a symmetrical 3-phase, 400 V supply of phase sequence RYB. Z1 = (8 – j 6) Ω and is connected between lines R and Y. Z2 = (6 + j 8) Ω and is connected between lines Y and B. Z3 = (10 + j 0) Ω and is connected between lines B and R. Calculate (i) line and phase currents (ii) power per phase (iii) total power. Verify the results by creating a MATLAB Simulink model and program. Obtain the plots for the currents and voltages. Repeat for a case when the same loads are now connected in star.
A three-phase system has balanced conditions so that the per-phase circuit representation can be used as shown in Figure 1 Select the turns ratio of the step-up and step-down transformers that the system operates with an efficiency greater than 99 percent. Moreover, find the complex power (received or given) of all components in the circuit and the V1 and V2 voltages. The load voltage is specified as 4 kV rms, and the load impedance is 4/3 ohm. ..
Find the following: the power drawn by the 100ohm variable resistor If the variable resistor is set to 200-ohms, instead of 100-ohms, What is the power drawn by the 200-ohms resistor? total current of the system Is the circuit inductive, capacitive, or neither (resistive)? NOTE: Polar form for Voltage & Current. Rectangular form for Impedance
What is the main direct cause of reactive power in AC system?A. Resistance of transmission linesB. Inductance and capacitance in the loadsC. Ideal transformer connected in the systemD. Power produced by generator2. “Reactive power in a system is dissipated generally as thermal energy?”A. TRUEB. FALSE3. Which of the following statements are correct for three phase circuit:A. Sum of all the three phase currents is zero in unbalanced networkB. Total power transfer to load is constant with timeC. Neutral conductor is same size in terms of material used as in single phase conductorsD. Net apparent power consumed is equal to real power
The currents in each branch of a two - branched parallel circuit are given by expression i1 = 7.07sin(314t - π/4) A and i2 = 21.2sin((314t - π/3) A. The supply voltage is given by the expression v = 354sin 314t V. Determine the impedance Z1 and Z2. a. Z1 = 50.07 Ω, Z2 = 16.7 Ω b. Z1 = 35.4 Ω, Z2 = 8.35 Ω c. Z1 = 10.0 Ω, Z2 = 10.2 Ω d. Z1 = 14.46 Ω, Z2 = 14.14 Ω
Complete the table using Kirchhoff's Laws Compose the voltage equations based on the variables given.Retain the signs generated by the tracing directions. Multiply with the least common factor to remove any fractions. KVL @ loop A: k11Vx + Z12Ix + Z13Iy = Source1 KVL @ loop B: k21Vx + Z22Ix + Z23Iy = Source2 KVL @ loop C: k31Vx + Z32Ix + Z33Iy = Source3
Having a phase impedance of 23.7 + j17.1 Ω at 50 Hz given in Figure Δ-connected load, Y-joint source resulting in 400 V and 50 Hz with impedance 0.1 + j0.3 Ω on each line fed by. According to this, a) Find the line flow and load voltage. b) Find the load-arm currents. c) There are active and protective forces produced by the source.
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.
Is G(s) a system with a non-minimum phase? Specify your reason.
The one-line diagram of a three-phase power system is as shown in the figure attached. Impedances are marked in per unit on a 100-MVA, 400-kv base. The load at bus 2 is S(sub 2) = 15.93 MW - j33.4 Mvar, and bus 3 is S(sub 3) = 77MW + j14 Mvar. I tis required to hold the voltage at bus 3 at 400 angle 0 degrees kV. Working in per unit, determine the voltage at buses 2 and 1.
A 400V three-phase, four wire system has the following loads connected: Phase 1: load impedance Z1 = 40 + j15 Ω Phase 2: load impedance Z2 = 60 Ω Phase 3: load impedance Z3 = 15 – j20 Ω I am just looking for the working out for phase 2 - please ignore the other phases The line and phase voltages for all phases (including phase angles) The line and phase currents for all phases (including phase angles) The neutral current (including phase angle)
a) A 415 V mains supplies a star-connected load at 50 Hz. Each branch of the load is a resistor of 24 Ω. Using 415 V and 20kVA bases calculate the following:i) Base impedance [EV3]ii) Base current [EV3]iii) Per unit load resistance [EV3]iv) Per unit current [EV6]v) Per unit power [EV3] b) Statei. Two advantages of per unit notation [AP4]ii. Three advantages of three phase system over single phase system [AP3]