[j0.11565 j0.045807 Ljo.04580 j0.13893 between buses 1 and 2, what is the new Zpus? A two-bus system has Zpus pu. If an impedance Z, = j0.4 pu is co %3D
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- A small manufacturing plant is located 2 km down a transmission line, which has a series reactance of 0.5/km. The line resistance is negligible. The line voltage at the plant is 4800V(rms). and the plant consumes 120kW at 0.85 power factor lagging. Determine the voltage and power factor at the sending end of the transmission line by using (a) a complex power approach and (b) a circuit analysis approach.With the system shown in figures, use 100MVA as system base, and 230 kV as base voltage along the transmission line. 1. Build the Y-bus matrix without the Load. What is the element Y12 in susceptance value? 2. If you are to convert the real power load to a shunt conductance, what is the value of the conductance in per unit?What is the need to conduct power flow analysis? Discuss about data needed and bus types too.
- Choose the right answer. 1. The symmetrical component method is …………. 2. Conditions for succesful operation of a power system ………،……….. and ………… 3. The reason we use the numerical methods in load flow analysis is ……….Explain the concept of dynamic line rating (DLR) and its significance in optimizing power transmission capacity.a) Find the Y-bus power system in rectangular and polar coordinates.b) Specify the type of each bus, and the known/unknown values. c) What is the real and reactive power injections at buses 2 and 3?
- Explain the importance of load flow analysis in power systems. How does it help in optimizing the operation of electrical grids?The figure below shows the one-line diagram of a simple three-bus power system withgeneration at bus 1. The voltage at bus 1 is V1 = 1.0∠0°per unit. The scheduledloads on buses 2 and 3 are marked on the diagram. Line impedances are marked inper unit on a 100 MVA base.(a) Using Gauss-Seidel method and initial estimates of ?2(0) = 1.0 + ?0, ?3(0) = 1.0 + ?0, determine V2and V3. Perform two iterations.(b) If after several iterations the bus voltages converge to?2 = 0.90 − ?0.10 pu?3 = 0.95 − ?0.05 pudetermine the line flows and line losses and the slack bus real and reactive power.Determine the bus voltages at buses 2 and 3 after 1st iteration using GS method. Take the acceleration factora=1.6
- • Zh = 100 ohm • Draw the pu reactance diagram by taking Ut(base) = 132kV, St(base) = 100MVA. If the 33 kV busbar voltage is kept constant at 30 kV and 0.8 inductive 50 MVA power is drawn from this bus, what is the voltage at the synchronous machine ends?A two-area system connected by tie-line has the following parameters on a 1000 MVA common base Area The units are operating in parallel at the nominal frequency of 50 Hz. A load change of 200 MW occurs in area 1. Determine the new steady state frequency and the change in the tie-line flow?Hourly variation factor need to consider while dealing with the non-coincidence demand of different loads True False