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A three-phase load has a voltage of 1.0 pu with current 0.1 pu. The current lags...
A three-phase feeder has line voltage of 13.8 kV and supplies load of 7000 kVA at...
A three-phase feeder has line voltage of 13.8 kV and supplies load of 7000 kVA at power factor of 0.8 lagging. Find: The feeder current in A, real power in kW and Reactive power in kVAr. The capacitor size in kVAr to improve the power factor to 0.98. The feeder power in kW and kVA and current in A, after installing the capacitor bank.
1. A three-phase voltage source is feediing the three phase receiving end voltage through a three...
1. A three-phase voltage source is feediing the three phase receiving end voltage through a three phase series impedance. To compensate the lines, a series voltage is injected using the three phase static synchronous series compensator (SSSC). Draw a schematic diagram of this system including the lines, the transformer and the converter. 2. The per unit source voltage magnitude is 1.0 pu with an angle of 10 degrees while per unit phase voltage of the receiving end is 0.95 pu...
Q3. (30 marks in total) A) Four generator units (two 500MW and two 600MW, as at Liddel Power Stat...
Q3. (30 marks in total) A) Four generator units (two 500MW and two 600MW, as at Liddel Power Station) are connected to the same grid. All generators have 4% droop characteristics. How will they share a sudden load increase by 300MW? By how much (in Hz) will the grid frequency change as the result of this load increase? (15 marks) A big industrial load is connected to a 1.0 pu bus via a feeder. The load has 0.85 power factor...
Problem 3 Two parallel 3-phase loads are supplied from a 3-phase source with line-line voltage of...
Problem 3 Two parallel 3-phase loads are supplied from a 3-phase source with line-line voltage of 415.6922 V rms. The data of their power consumption are as follows. Load 1: 15 kVA at power factor of 0.75 lagging Load 2: 9 kW at power factor 0.82 lagging 1) 2) 3) 4) 5) Determine the complex power consumed by Load 1 Find the complex power consumed by Load 2 Calculate the total complex power consumed by the two loads. Determine the...
A 240V three phase power system supplies two loads in parallel: Load 1: measured line current...
A 240V three phase power system supplies two loads in parallel: Load 1: measured line current 30A, power factor 0.85 lagging, and Load 2: measured power 10kW, reactive power -7.5kVar A. Determine the power factor of load 2. B. Determine the total real power (in kW), reactive power (in kVAR), apparent power (in kVA), power factor and line current (in A) of the two loads.
2. [15 pts total] A single-phase load draws 1 MW at 0.75 power factor lagging. a....
2. [15 pts total] A single-phase load draws 1 MW at 0.75 power factor lagging. a. [10 pts] Determine the power required from an added parallel capacitor to bring the power factor of the parallel combination up to 0.95 lagging. b. [05 pts) Determine the power required from an added parallel capacitor to bring the power factor of the parallel combination up to 0.95 leading.
A single-phase electrical load draws 1000KVA at 0.8 power factor lagging. a) Find the real and...
A single-phase electrical load draws 1000KVA at 0.8 power factor lagging. a) Find the real and reactive power absorbed by the load. b) Draw the power triangle. c) Determine the KVAR of a capacitor to be connected across the load to raise the power factor to 0.95.
Question 1 (1 point) The voltage across a single phase load is v(t)=215 cos(315t). The load...
Question 1 (1 point) The voltage across a single phase load is v(t)=215 cos(315t). The load is consuming 1150+j1030 power. Find the value of a capacitor such that if it was connected in parallel across the load and voltage source, the resulting power factor at the voltage source would be 0.93 lagging.
Problem 3. Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs...
Problem 3. Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is (1.4 + j1.6) 12 per phase between generator G1 and the load, and (0.8 + jl) 2 per phase between generator G2 and the load. If generator G1 supplies 15 kW at 0.8 power factor lagging, with a terminal voltage of 460 V line-to-line, determine: 1. The voltage at the load terminals. 2....
Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW...
Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is (1.4 +J1.6) Ω per phase between generator G1 and the load, and (0.8 +jl ) Ω per phase between generator G2 and the load. If generator Gl supplies 15 kW at 0.8 power factor lagging, with a terminal voltage of 460 V line- to-line, determine 1. The voltage at the load terminals. 2. The voltage...
1. A three-phase voltage source is feediing the three phase receiving end voltage through a three phase series impedance. To compensate the lines, a series voltage is injected using the three phase static synchronous series compensator (SSSC). Draw a schematic diagram of this system including the lines, the transformer and the converter. 2. The per unit source voltage magnitude is 1.0 pu with an angle of 10 degrees while per unit phase voltage of the receiving end is 0.95 pu...
Q3. (30 marks in total) A) Four generator units (two 500MW and two 600MW, as at Liddel Power Station) are connected to the same grid. All generators have 4% droop characteristics. How will they share a sudden load increase by 300MW? By how much (in Hz) will the grid frequency change as the result of this load increase? (15 marks) A big industrial load is connected to a 1.0 pu bus via a feeder. The load has 0.85 power factor...
Problem 3 Two parallel 3-phase loads are supplied from a 3-phase source with line-line voltage of 415.6922 V rms. The data of their power consumption are as follows. Load 1: 15 kVA at power factor of 0.75 lagging Load 2: 9 kW at power factor 0.82 lagging 1) 2) 3) 4) 5) Determine the complex power consumed by Load 1 Find the complex power consumed by Load 2 Calculate the total complex power consumed by the two loads. Determine the...
A 240V three phase power system supplies two loads in parallel: Load 1: measured line current 30A, power factor 0.85 lagging, and Load 2: measured power 10kW, reactive power -7.5kVar A. Determine the power factor of load 2. B. Determine the total real power (in kW), reactive power (in kVAR), apparent power (in kVA), power factor and line current (in A) of the two loads.
2. [15 pts total] A single-phase load draws 1 MW at 0.75 power factor lagging. a. [10 pts] Determine the power required from an added parallel capacitor to bring the power factor of the parallel combination up to 0.95 lagging. b. [05 pts) Determine the power required from an added parallel capacitor to bring the power factor of the parallel combination up to 0.95 leading.
Question 1 (1 point) The voltage across a single phase load is v(t)=215 cos(315t). The load is consuming 1150+j1030 power. Find the value of a capacitor such that if it was connected in parallel across the load and voltage source, the resulting power factor at the voltage source would be 0.93 lagging.
Problem 3. Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is (1.4 + j1.6) 12 per phase between generator G1 and the load, and (0.8 + jl) 2 per phase between generator G2 and the load. If generator G1 supplies 15 kW at 0.8 power factor lagging, with a terminal voltage of 460 V line-to-line, determine: 1. The voltage at the load terminals. 2....
Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is (1.4 +J1.6) Ω per phase between generator G1 and the load, and (0.8 +jl ) Ω per phase between generator G2 and the load. If generator Gl supplies 15 kW at 0.8 power factor lagging, with a terminal voltage of 460 V line- to-line, determine 1. The voltage at the load terminals. 2. The voltage...
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