Draw three phase and single phase electrical equivalent model of a transmission line (T and π models).
Note: the book used is POWER SYSTEM ANALYSIS - John J. Grainger.
Draw three phase and single phase electrical equivalent model of a transmission line (T and π...
What are the characteristic parameters of transmission lines and upon what they depend? Note: the book used is POWER SYSTEM ANALYSIS - John J. Grainger.
A single circuit three phase transmission line which is 110miles long and made of Ostrich Problem 2: single circuit, three phase transmission line which is 110 miles long and made of Ostrich conduction ivers 70 MVA of power to a load with power factor of 0.85 lagging. If the V Lu is 169 KV and the spacing between each phase of conductors is 12.2 ft, determine: a) The line constants (ABCD) The sending end voltage, current, real and reactive power...
PROBLEM: A 230-kV, 50 Hz, three-phase transmission line is 120 km long. The line has a per phase series impedance of z-0.05 +j0.45 Ω per km, and a per phase shunt admittance of y 3.4x10-6 Siemens per km. The line delivers (at the receiving end) 200 MVA, 0.8 lagging power factor at 220 kV. Now consider two cases: A- Assume that shunt parameters of the transmission line are ignored (i.e. even if this is a medium length transmission line, under...
Q2. Draw the nominal π circuit that is used to represent the medium-length transmission line model with total series impedance Z and total shunt admittance Y. Then derive the equations to express the ABCD parameters (a) 20% (b)A 200 km, 230 kV, 50 Hz three-phase overhead transmission line has a positive-sequence series impedance z (0.08 + j0.48) Ω/km, and a positive-sequence shunt admittance y-j3.33 x 10T° S/km. At full load, the line delivers 250 MW at 0.99 power factor lagging...
A three-phase transmission line is 200 km long. lt has a total series impedance of 25+j110)Ω Per Phase and a total shunt admittance ofj5x 10 Ω. It delivers 180 MW at 275 kV and 0.8 power factor lagging to a load connected at the receiving end. Using the medium π model of the line, determine the voltage, current, real power, reactive power and power factor at the sending end of the line.
A three-phase electrical heater dissipates 50kW when connected to a 4160V, 3-phase line. (a) Draw the circuit diagram and indicate system parameters (line to line voltage, currents, fuses, etc.) if the loads (resistors) are connected in WYE. (b) What is the LINE current if the resistors are all connected in WYE? (c) Draw the circuit diagram and calculate the LINE current if the resistors are all connected in DELTA? (d) While the delta connected load resistors are working fine, and...
A balanced three-phase delta-connected load is connected to a balanced three-phase delta-connected source via a transmission line. The line-line voltage for the source is 100∟0° V/phase and the impedance of load is (27 + j18) Ω/phase. The transmission line has an impedance of (1 + j4) Ω/line. a) Draw the complete schematic of the power system showing the location of wattmeters. (Two-Wattmeter system is considered for this problem). Phase “a” could be considered as a reference phase. b) What must...
note that 1) single phase system 2) base values at transmission line circuit A 100 MVA, 12 kV Single-phase generator has a sub transient reactance of 20%. The generator supplies a two synchronous motors over 25-km transmission line having transformers at both ends. The motors, all rated 6.0 kV, 66 MVA and 50 MVA for Mi and M2, respectively. For both motors X" = 15%. The single phase transformer T is rated 150 MVA, 132/12 kV with leakage reactance of...
A 230kV three phase transmission line has a per phase series impedance of z=0.05+j0.45ohms per km and a per phase shunt admittance of y= j3.4x10^-6 siemens per km. The line is 80km long. Using the medium line pi model: (a) Determine the transmission line model constants A, B, C, and D (b) Find the sending end (generating) voltage, current and power when the line delivers to a load of 1. 200 MVA with 0.8 lagging power factor at 220 kV...
PLEASE DON'T THROW ANY RANDOM ANSWER PLEASE The Fig. 1 shows a double-circuit three-phase 500-kV. 60 Hz, 300-km, on a steel tower completely transposed, symmetrical about both the horizontal and vertical center lines. The diameter of each conductor is 3.796298186 cm. The resistance of the transmission line is 2.84x10-4 Ω-m and the line is lossless. The receiving-end power is 800 MW at 0.8 power factor lagging and at 500 kV 14 m 14 m 14 m 14 m 1. Determine...