Two balanced three phase loads are connected in parallel, the loads are L1= 20 kW at 0.7 pf lead, and L2= 12 kVA at 0.9 pf lag. The loads are fed from a distribution line with an impedance of 0.05+j0.2 N/D. The line to neutral voltage at the load end is 203 V and zero phase shift, the capacitance of A-connected capacitor bank that connected parallel to the loads to improve the power factor to unity in µF is; (f=60 Hz) O A. None B. 325.49 O C. 976.48 O D. 108.50 O E. 36.17

Two balanced three phase loads are connected in parallel, the loads are L1= 20 kW at 0.7 pf lead, and L2= 12 kVA at 0.9 pf lag. The loads are fed from a distribution line with an impedance of 0.05+j0.2 N/D. The line to neutral voltage at the load end is 203 V and zero phase shift, the capacitance of A-connected capacitor bank that connected parallel to the loads to improve the power factor to unity in µF is; (f=60 Hz) O A. None B. 325.49 O C. 976.48 O D. 108.50 O E. 36.17

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 2.19P: Consider a single-phase load with an applied voltage v(t)=150cos(t+10)volts and load current...

See similar textbooks

Similar questions

A three-phase line with an impedance of (0.2+j1.0)/ phase feeds three balanced three-phase loads connected in parallel. Load 1: Absorbs a total of 150 kW and 120 kvar. Load 2: Delta connected with an impedance of (150j48)/phase. Load 3: 120 kVA at 0.6 PF leading. If the line-to-neutral voltage at the load end of the line is 2000 v (rms), determine the magnitude of the line-to-line voltage at the source end of the line.
A three-phase line, which has an impedance of (2+j4) per phase, feeds two balanced three-phase loads that are connected in parallel. One of the loads is Y-connected with an impedance of (30+j40) per phase, and the other is -connected with an impedance of (60j45) per phase. The line is energized at the sending end from a 60-Hz, three-phase, balanced voltage source of 1203V (rms. line-to-line). Determine (a) the current, real power. and reactive power delivered by the sending-end source: (b) the line-to-line voltage at the load: (C) the current per phase in each load: and (d) the total three-phase real and reactive powers absorbed by each load and by the line. Check that the total three- phase complex power delivered by the source equals the total three-phase power absorbed by the line and loads.
Consider a single-phase load with an applied voltage v(t)=150cos(t+10)volts and load current i(t)=5cos(t+50)A. (a) Determine the power triangle. (b) Find the power factor and specify whether it is lagging or leading. (c) Calculate the reactive power supplied by capacitors in parallel with the load that correct the power factor to 0.9 lagging.
Two balanced loads are connected to a 240-kV rms 50-Hz line. Load 1 draws 30 kW at a power factor of 0.6 lagging, while load 2 draws 45 kVAr at a power factor of 0.8 lagging. Assuming the RYB sequence, determine: (a) the complex, real, and reactive powers absorbed by the combined load, (b) the line currents, and (c) the kVAr rating of the three capacitors ∆-connected in parallel with the load that will raise the power factor to 0.9 lagging and the capacitance of each capacitor. Verify the results by creating a MATLAB Simulink model and program. Obtain the plots for the currents and voltages
Three symmetrical three-phase loads are connected in parallel. Load 1 is connected in Y with an impedance of 400 + j300Ω / φ, load 2 is connected in with with an impedance of 2400 - j1800Ω / φ and load 3 is evaluated at 172.8 + j2203.2 kVA. Loads are supplied from a distribution line with an impedance of 2 + j16Ω / φ. Size of the voltage between the line and the neutral conductor at the end of the charge the line is 24√3 kV. The operating frequency is 50 Hz.(a) Calculate the line currents and the phase currents of the loads.(b) Calculate the total complex power at the receiving end of the system.(c) Calculate the total complex power at the transmitting end of the line.(d) Calculate the values of the compensation capacitors which are connected from the line to the neuron at the load end of the system so that the power factor at the load end reaches pf ≥ 0.98.(e) What if the capacitors are connected from one line to another? What would be the best choice for compensation, the…
Under balanced operating conditions, consider the 3-phase complex power delivered by the 3-phase source to the 3-phase load. Match the following expressions, those on the left to those on the right. 0) Real power, Py (ii) Reactive power, Qu (ii) Total apparent power Sy (iv) Complex power, Sy (a) (V3 VLL. IL)VA (b) (V3 Vu sng) var (e) (V3 VLL. IL cos ø) W (d) Py +Qy Note that VLL is the rms line-to-line voltage, IL is the ms line current, and o is the power-factor angle.
A balanced three-phase source furnishes power to the following three loads:Load 1: 6 kVA at 0.83 pf laggingLoad 2: unknownLoad 3: 8 kW at 0.7071 pf leadingIf the line current is 84.6 A rms, the line voltage at the load is 208 V rms, and the combined load has a0.8 pf lagging, determine the unknown load.
A 3-phase Y-connected load draws power from a 3-phase Y-connected source. The source voltage, ?=440∠0º?_rms and the load impedance, Z_y=(30+j15) Ω. The line impedance, Z_line= (1+j1)Ω and the system operates at 60 Hz. a) Draw the single-phase equivalent circuit and label all given quantities numerically. b) Calculatethe rms line (phase) current phasor in each phase. c) Calculate the total active or real power supplied by the source. d) Calculate the total active or real power consumed by the load. e) Calculate the total line loss i.e. the total activepower lost due to line. f) Determine the power efficiency of the system.
A balanced three-phase source furnishes power to the following three loads:Load 1: 6 kVA at 0.83 power factor laggingLoad 2: unknownLoad 3: 8 kW at 0.7071 power factor leadingIf the line current is 84.6 A rms, the line voltage at the load is 208 V rms, and the combined loadhas a 0.8 power factor lagging, determine the unknown load.
Given: 1. 2 wye-connected loads per phase to a 3 phase power source 2. first load consists of a 55ohm resistance and a 0.05H inductance per phase 3. second load consumes 1kW and power factor of 0.7 lagging per phase 4. RMS of voltage across the loads are 220V, frequency 120Hz per phase 5. single phase equivalent is shown in the figure: Question: Give the value of reactive power per phase seen at load 2.
A 15kV, 3 phase circuits feeds a load of 10,000 kW at a lagging load factor and the load current of 750A. If it is desired to improve the power factor, determine the following: The uncorrected power factor;Reactive load;The new corrected power factor after installing a shunt capacitor unit with a rating of 9000 kVAR. (a) 0.813 lagging (b) 14723 kVAR (c) 0.9 lagging (a) 0.613 lagging (b) 15723 kVAR (c) 0.75 lagging (a) 0.713 lagging (b) 13723 kVAR (c) 0.85 lagging (a) 0.513 lagging (b) 16723 kVAR (c) 0.80 lagging
Three loads are connected in parallel to a 1400 Vrms, 60 Hz single-phase source.Load 1: Inductive load S=125 kVA, GF=0.28Load 2: Capacitive load P=10 kW, Q=40 kVARLoad 3: Resistive load p=15 kw a)Find the total P(kw), Q(kVAr), S(kVA) and the power factor of the source.b)When a capacitor is connected parallel to the loads to make the power factor lagging behind 0.8, find the Q(kVAr) and capacitance (uF) of this capacitor.