determine the line currents
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- 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 voltages2. A load Z draws 12 kVA at a power factor of 0.856 lagging from a 120-Vrms sinusoidal source. Calculate: (a) the average and reactive powers delivered to the load, and (b) the peak current.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 12,470V, three-phase, three wire source supplies a balanced wye load having an impedance of 50 angle -30° ohms per phase. Find the magnitude of the rms line current.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.In 3 phase 11kVV generator having unity power factor of 100MW load and the sending and receiving end voltage is 11KV and the value of the impedance is j0.242. What isthe value of the reactive power delivered by the capacitor.
- 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.A balanced three-phase source with grounded neutral has line-to-line voltages of 208 volts with ab-bc-ca sequence. It supplies power to an unbalanced three-phase wye, neutral grounded, load with impedances: Zan = 18-j10; Zbn = 15+j25; Zcn = 20+j30 ohms. What is the magnitude of the overall total apparent power of the system in va?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 three-phase line has an impedance of 1 + j3 Ω per phase. The line feeds a balanced delta-connected load, which absorbs a total complex power of 12 + j5 kVA. The line voltage at the load end has a magnitude of 250 V. Find the source power factor. The source power factor pf = Please answer in typing format pleaseA three-phase 2400 V RMS supply feeds a load of 300 kVA, FP = 0.8 delayed in parallel with another of 240 kVA and FP = 0.6 ahead. Considering the ABC phase sequence, determine the line currents. note: the voltage is line obs:A balanced three-phase Y-connected source with positive sequance has an internal voltage of 120 V/phase. The source feeds a balanced three-phase Y-connected load having an impedance of 39 + j28 Ω /phase. The impedance of the transmission line connecting the source to the load is 1 + j2 Ω /phase. The a-phase of the source is the reference voltage. d) Calculate the three line-to-line voltages at the terminals of the load. e) Calculate the total average power in watts delivered to the load. f) Calculate the total complex power in VA delivered by the source.