POWER SYS. ANALYSIS+DESIGN
6th Edition
ISBN: 9780357700907
Author: Glover
Publisher: INTER CENG
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Determine the flow of active and reactive powers at the ends of the line: (Figure below)
Consider the 500 kV, three phase bundled conductor line as shown in the figure below. Find the
line to neutral capacitance.
0.5 m
30 mm
(0)
(O to Ine
15 m
15 m
Q2. Figure Q2 shows the single-line diagram. The scheduled loads at buses 2 and 3 are as
marked on the diagram. Line impedances are marked in per unit on 100 MVA base and the line
charging susceptances are neglected.
a) Using Gauss-Seidel Method, determine the phasor values of the voltage at load bus 2
and 3 according to second iteration results.
b) Find slack bus real and reactive power according to second iteration results.
c) Determine line flows and line losses according to second iteration results.
d) Construct a power flow according to second iteration results.
Slack Bus
= 1.04.20°
0.025+j0.045
0.015+j0.035
0.012+j0,03
3
|2
134.8 MW
251.9 MW
42.5 MVAR
108.6 MVAR
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- Considering two parallel three-phase circuits that are close together, when calculating the equivalent series-impedance and shunt-admittance matrices, mutual inductive and capacitive couplings between the two circuits can be neglected. True Falsearrow_forwardDetermine the equivalent Pi circuit for the line in Problem 5.14 and compare it with the nominal pi circuit. The following picture shows problem 5.14.arrow_forwardExplore the potential of high-voltage direct current (HVDC) transmission systems in interconnecting regional power grids.arrow_forward
- Describe the effect of resistive load on sending and receiving end voltages, Power transferred and Power factor.arrow_forward-The voltage magnitude and phase angle are the quantities to be determined after load flow analysis for ............bus. -The total reactance of the transmission system is reduced by installing a series capacitor. Select one: True Falsearrow_forwardComplete the sentence The power factor must be close to ……………. To insure that losses in the transmission lines will be reducedarrow_forward
- The equivalent circuit of a single phase short transmission line is shown in Figure Q4 (b). Here, the total line resistance and inductance are shown as lumped instead of being distributed. i) Sketch the phasor diagram and assess with by labeling the details for the A.C. series circuit shown in Figure Q4 (b) for the lagging power factor at load point (Vn). ii) Summarize, the impact of voltage regulation and efficiency, if the line resistance and line increases are doubled Figure Q4(b). R XL Vs Vn Figure Q4(b) Loadarrow_forwardQ4(b) The equivalent circuit of a single phase short transmission line is shown in Figure Q4(b). Here, the total line resistance and inductance are shown as lumped instead of being distributed. i) Sketch the phasor diagram and assess with by labeling the details for the A.C. series circuit shown in Figure Q4(b) for the lagging power factor at load point (Vn). ii) Summarize, what if the load change from low value to high value shown in Figure Q4(b). R XL el Vs Vn Figure Q4(b) Loadarrow_forwardDiscuss the concept of Voltage Source Converters (VSCs) in high-voltage direct current (HVDC) transmission systems. How do VSCs enable bidirectional power flow, enhance grid stability, and facilitate renewable energy integration?arrow_forward
- iv. For a long high voltage transmission line with light loading : (a) The voltage is generally high due to reactive power generated by the line. (b) The voltage is generally high due to the light loading. (c) The voltage is generally high due to high reactive power generated and the low reactive power consumed by the line.arrow_forward400Ω A k=0.9 600Ω B k=0.8 66Ω 600Ωarrow_forwardIn the T-Model method which among these are divided into two halves. a. Both (A) and (B) b. None of these c. Shunt capacitance d. Series impedancearrow_forward
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