1. Thyristor-Controlled Series Capacitor (TCSC) for power factor improvement 2. What are the constraints are followed in Unit commitment
Q: manufacturing plant takes 200,000 Watts, at 0.6 power factor. Form a 600 V, 60 Hz, three phase…
A: Please refer the attached images for the complete answer..
Q: ) In terms of load assessment, define the following: Demand Factor Load Factor Diversity
A: As per Bartleby guidelines we are allowed to solve only one question with maximum three subparts,…
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A: This is based on the fill the blank The _____________________ of transformers are neglected to draw…
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A: In this answer let us discuss the concept of short circuit current and try to find its value at t=0.
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A: Please refer the attached images for the complete answer..
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Q: 1. Thyristor-Controlled Series Capacitor (TCSC) for power factor improvement 2. What are the…
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A: In the power systems analysis, Per Unit values are defined for per phase only not for 3 phase . A…
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A: Fill the blank
Q: (1) In terms of load assessment, define the following: Demand Factor Load Factor Diversity
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A:
1. Thyristor-Controlled Series Capacitor (TCSC) for power factor
improvement
2. What are the constraints are followed in Unit commitment?
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- Consider three ideal single-phase transformers (with a voltage gain of ) put together as three-phase bank as shown in Figure 3.35. Assuming positive-sequence voltages for Va,Vb, and Vc find Va,Vb, and VC. in terms of Va,Vb, and Vc, respectively. (a) Would such relationships hold for the line voltages as well? (b) Looking into the current relationships, express IaIb and Ic in terms of IaIb and Ic respectively. (C) Let S and S be the per-phase complex power output and input. respectively. Find S in terms of S.For developing per-unit equivalent circuits of single-phase three-winding transformer, a common Sbase is selected for all three windings and voltage bases are selected in proportion to the rated voltage of the windings (a) True (b) FalseThree single-phase, two-winding transformers, each rated 450MVA,20kV/288.7kV, with leakage reactance Xeq=0.10perunit, are connected to form a three-phase bank. The high-voltage windings are connected in Y with a solidly grounded neutral. Draw the per-unit equivalent circuit if the low-voltage windings are connected (a) in with American standard phase shift or (b) in Y with an open neutral. Use the transformer ratings as base quantities. Winding resistances and exciting current are neglected.
- Given two generating units with their respective variable operating costs as C1=0.01PG12+2PG1+100/hr for25PG1150MWC2=0.004PG22+2.6PG2+80/hr for 30PG2200MW determine the economically optimum division of generation for 55PL350 MW. In particular, for PL=282MW, compute PG1 and PG2. Neglect transmission losses.In developing per-unit circuits of systems such as the one shown in Figure 3.10. when moving across a transformer, the voltage base is changed in proportion to the transformer voltage ratings. (a) True (b) FalseThe per-unit equivalent circuit of two transformers Ta and Tb connected in parallel, with the same nominal voltage ratio and the same reactan of 0.1 per unit on the same base, is shown in Figure 3.43. Transformer Tb has a voltage-magnitude step-up toward the load of 1.05 times that of Ta (that is, the tap on the secondary winding of Tb is set to 1.05). The load is represented by 0.8+j0.6 per unit at a voltage V2=1.0/0 per unit. Determine the complex power in per unit transmitted to the load through each transformer, comment on how the transformers share the real and reactive powers.
- The amplitude of the sinusoidal symmetrical ac component of the three-phase short-circuit current of an unloaded synchronous machine decreases from a high initial value to a lower steady-state value, going periods through the stages of __________ and ________ periods.Three single-phase two-winding transformers, each rated 25MVA,54.2/5.42kV, are connected to form a three-phase Y- bank with a balanced Y-connected resistive load of 0.6 per phase on the low-voltage side. By choosing a base of 75 MVA (three phase) and 94 kV (line-to-line) for the high-voltage side of the transformer bank, specify the base quantities for the low-voltage side. Determine the per-unit resistance of the load on the base for the low-voltage side. Then determine the load resistance RL in ohms referred to the high-voltage side and the per-unit value of this load resistance on the chosen base.Consider the oneline diagram shown in Figure 3.40. The three-phase transformer bank is made up of three identical single-phase transformers, each specified by X1=0.24 (on the low-voltage side), negligible resistance and magnetizing current, and turns ratio =N2/N1=10. The transformer bank is delivering 100 MW at 0.8 p.f. lagging to a substation bus whose voltage is 230 kV. (a) Determine the primary current magnitude, primary voltage (line-to-line) magnitude, and the three-phase complex power supplied by the generator. Choose the line-to-neutral voltage at the bus, Va as the reference Account for the phase shift, and assume positive-sequence operation. (b) Find the phase shift between the primary and secondary voltages.