F,(P,) = 1000P, Baht 30 < P, < 150 MW F,(P,) = 1500P, Baht 40 < P, < 200 MW %3D %3D Bus 1 Bus 2 Transmission Line G1 G2 Line Limit 100 MW Load 1 Load 2 120 MW 200 MW erform economic dispatch to define P, and P,
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- 1. FIGURE 52 shows the one-line diagram of a simple three-bus power system with generation at bus I. The voltage at bus l is V1 = 1.0L0° per unit. The scheduled loads on buses 2 and 3 are marked on the diagram. Line impedances are marked in per unit on a 100 MVA base. For the purpose of hand calculations, line resistances and line charging susceptances are neglected a) Using Gauss-Seidel method and initial estimates of Va 0)-1.0+)0 and V o)- ( 1.0 +j0, determine V2 and V3. Perform two iterations (b) If after several iterations the bus voltages converge to V20.90-j0.10 pu 0.95-70.05 pu determine the line flows and line losses and the slack bus real and reactive power. 2 400 MW 320 Mvar Slack 0.0125 0.05 300 MW 270 Mvar FIGURE 52In a short transmission line, the line charging current value is smaller than a medium transmission line. tap changing transformer Calculate the weight due to ice on a transmission line where the Total weight of conductor = 3.2 Kg/m, actual weight of conductor = 1.4 Kg/m, and weight due to wine %3D %3D 0.4 Kg/m. In a short transmission line, the line charging current value is smaller than a medium transmission line.Discuss the principles and benefits of High Voltage Direct Current (HVDC) transmission in power systems.
- System AB is connected to system BC via a 1000 MW tie-line. The total capacity of the online units and the demand of system AB are 10000 MW and 8500 MW, respectively. The total capacity of the online units and the demand of system BC are 20000 MW and 17000 MW, respectively. System AB is importing 500 MW from system BC and all units operate with a common governor droop setting of 5% for both systems. All generating units are operating with sufficient spinning reserve and can respond to frequency changes. AB System capacity=10000 MW 8500 MW 9000 MW AB system load (a) (b) (c) (d) (e) T... 60.15 Hz 60.075 Hz 60.0 Hz 59.925 Hz 59.85 Hz BC system capacity = 20000 MW 500 MW 17500 MW Q34. Determine the new frequency of system AB if the tie-lie interconnecting systems AB and BC trips (a) (b) (c) (d) Q35. Determine the new frequency of system BC if the tie-lie trips 60.15 Hz 60.075 Hz 60.0 Hz 59.925 Hz 59.85 Hz 17000 MW BC system loadQ2. 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 MVARDefine percentage line and load regulation
- 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.30) In a lightly loaded long distance EHV lines, line loading is and has a power factor: (A) Capacitive, lagging. (B) Capacitive, leading (C) Inductive, lagging (D) Inductive, leading. please contact me in whatsapp +962782974574Discuss 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?
- For the system shown in figure, voltages V2, V3 and angles 82, 83 are calculated using Newton-Raphson method. shunt line charging admittances are neglected. All the values are given in per unit on 100MVA base. Calculate the complex power flows S12 and S32 in actual units. 1) Z12 = 0.01+ j0.02 Z3 = 0.02+ j0.04 PL G QL Slack bus V2 = 0.96L -1.67° V3 = 0.884 - 5.48° Vi=1.0/0° (estimated time to answer this question: 13 minutes)1- construct a block diagram representation of a typical bulk power generation- transmission dristrivution system. label all components and briefly describe the function of each part of the system .Discuss the principles of electricity market operations, including spot markets, forward markets, and the role of independent system operators (ISOs).