Draw a reactance diagram for the electric power system shown in Fig. 2 showing all reactances in per-unit on a 100-MVA base. Choose 20 kV as the voltage base for generator. The three-phase power line-line ratings are given below: G,: 90 MVA 20kV X = 9% T;: 80 MVA 20/200 kV X = 16% T2: 80 MVA 200/20 kV X = 20% G2: 90 MVA 18 kV X = 9% Line: 200 kV X 120 Q T1 T2 Line G1 G2 Load
Q: Q2) A 13.2-kV single-phase generator supplies power to a load through a transmission line. The…
A: Given Vline=13.2kv⇒Vph=Vline3=13.23=7.62kv Apply kVL Vph=I Zline+Zload…
Q: Q4: The single line diagram of an unloaded power system is shown in Fig. below. Reactances of the…
A: Given mvAb = 50 MVA at G with kvb =13.8 kwXG1 = 0.2 x5020 = 0.5 ;XT1 = 0.1x5025 = 0.2;XTL1 =…
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A: The answer value given with question is incorrect, the correct solution can be achieved as follows.
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Q: 10. The yearly load duration curve of a certain power station can be approximated as a straight line…
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Q: The O.C and S.C test data are given below for a single phase, 5 kVA, 200V/400V, 50Hz transformer.…
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Q: Q1// The ratings of the power system elements shown in Fig.(1) are as follow: Generator: 15 MVA,…
A: Given data: Xg=0.15 pu Eg=13.8 kV XM1=0.15 pu EM1=13.8 kV XM2=0.15 pu EM2=14.4 kV XT1=0.1 pu…
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Q: Figure 1 shows the one-line diagram of four-bus power system with generation at bus 1 and bus 4. The…
A: Solution- The given figure is shown below,
Q: Figure 1 shows the one-line diagram of four-bus power system with generation at bus 1 and bus 4. The…
A: Solution- The given figure is shown below,
Q: 0.1 For each of the following sets of voltage and current, calculate the real and reactive power in…
A: As per guidelines we are supposed to answer only first question so please upload others seperately.
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Q: Q 2) The single-line diagram of a three-phase system is shown in Fig. 1. Using the common base Sp =…
A: Given data: Sb=50 MVAp.f=0.75
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Q: Consider The power system shown in Figure below. Use a 100-MVA base. Choose 17 kV as the voltage…
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Q: Q4: The single line diagram of an unloaded power system is shown in Fig. below. Reactances of the…
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Q: Q1// The ratings of the power system elements shown in Fig.(1) are as follow: Generator: 15 MVA,…
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Q: Figure 1 shows the one-line diagram of four-bus power system with generation at bus 1 and bus 4. The…
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Q: Q1. For each of the following sets of voltage and current, calculate the real and reactive power in…
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- A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and L=40mH. (a) Determine the power factor of the circuit and state whether it is lagging or leading. (b) Determine the real and reactive power absorbed by the load. (c) Calculate the peak magnetic energy Wint stored in the inductor by using the expression Wint=L(Irms)2 and check whether the reactive power Q=Wint is satisfied. (Note: The instantaneous magnetic energy storage fluctuates between zero and the peak energy. This energy must be sent twice each cycle to the load from the source by means of reactive power flows.)A 20 KVA single phase, which can be taken as of unity power factor, has a full load efficiency of 95.3%, the copper loss then being twice the iron loss Calculate its all-day efficiency at following daily cycle • quarter load for 10 hours. . half load for 8 hours. full load for 6 hoursThe annual load of a substation is given in the following table. During each month, the power is assumed constant at an average value. In the HTML editor below, write the MATLAB codes and the barcycle function to obtain a plot of the annual load curve. (Also write the necessary statements to find the average load and the annual load factor.) Annual System Load Interval, month Load, MW January February 8 6 Маrch 4 April Мay 2 June 12 July August September October 16 14 10 4 November 6. December 8
- 2.45 Two balanced Y-connected loads, one drawing 10 kW at 0.8 power factor lagging and the other 15 kW at 0.9 power factor leading, are connected in parallel and supplied by a balanced three-phase Y-connected, 480-V source. (a) Determine the source current. (b) If the load neutrals are connected to the source neutral by a zero-ohm neutral wire through an ammeter, what will the ammeter read?Q2) A 13.2-kV single-phase generator supplies power to a load through a transmission line. The load's impedance is Zload = 500 236.87° ohm, and the transmission line's impedance is Zline = 60 253.1° ohm. To reduce transmission line losses to 0.0103 of its losses without using the transformers design and use two transformers T1 between the generator and the transmission line and T2 between the transmission line and the load.Q1 Figure 1 shows the online diagram of a three-phase power system. By selecting a common base of 100 MVA and 22 kV on the generator side, draw an impedance diagram showing all impedancesincluding the load impedance in per-unit. The data are given as follows: G: 100 MVA 22 kV x= 0.18 per unitT1: 60 MVA 22/220 kVT2: 40 MVA 220/11 kVT3: 40 MVA 22/110 kVT4: 40 MVA 110/11 kVM: 66.5 MVA 10.45 kVLines 1 and 2 have series reactance’s of 48.4 and 65.43 V, respectively. Atbus 4, the three-phase load absorbs 57 MVA at 10.45 kV and 0.6 power factor lagging.Figure 1x =0.10 per unit x = 0.06 per unitx =0.064 per unit x= 0.08 per unit x =0.185 per unit
- Figure 1 shows a three-phase power system network comprises of synchronous generator, transformers, transmission lines and loads while Table 1 shows the ratings of the components. Using per unit analysis, 100 MVA base and 20 kV as the voltage base at the generator, answer the following questions: Ig T2 TLine Load C Load A Load B Figure 1: A simple power system network. Table 1: The power system component ratings G 90 MVA, 20 kV, XG = 120% T1 80 MVA, 20/132 kV, XTI = 16% T2 80 MVA, 132/11 kV, XT2 = 10% TLine 132 kV, XLine = 18 2 Load A 7 MW +j 3 Mvar Load B 30 MW +j 15 Mvar Load C 22 MVA, 0.89 power factor leading (a) Calculate the impedance per-unit values of all independent components based on given conditions.Q1. For the system shown in Figure Q1, draw an impedance diagram in per unit, by choosing 100 kVA to be the base kVA and 2400 V as the base voltage for the generators. 10 KVA 2400 V G₁ Z=j0.2pu 20 KVA 2400 V Z=j0.2pu G₂ T₁ Transmission Line Z= (50+j200) 40 KVA 2400/9600 V Z=j0.1pu Fig Q1 T₂ 80 KVA 10/5 kV Z=j0.1pu M 25 KVA 4 kVThe three-phase power and line-line ratings of the electric power system shown in Figure-1 are given below: G1:82 MVA 30 kV X=10% T1:72MVA 30/300 kV X=11% T2:72MVA 300/30 kV X=11% M:62MVA 25 kV X=9% 300 kV Z= 89+j179 Apply the knowledge of per unit system on above network and draw an impedance diagram showing all impedances in per unit when Sb =100MVA and Vb = 30 kv
- THESE ARE THE QUESTIONS FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS AND THE CHAPTER IS PERFORMANCE OF TRANSMISSION LINES AND THE TOPIC IS SHORT TRANSMISSION LINES THE ANSWERS ARE GIVEN WITH THE QUESTION PLEASE DO ALL THE QUESTIONS PROPERLY „DONOT SKIP ANY STEP AND DO YOUR BEST 4.) Estimate the distance over which a load of 15000 kW at 0-85 p.f. can be delivered by a 3-phase transmission line having conductors of steel-cored aluminium each of resistance 0-905 O/phase per kilometre. The voltage at the receiving end is to be 132 kV and the loss in transmission is to be 7-5% of the load. [69-55 km] 5). A 3-phase line 3 km long delivers 3000 kw at a p.f. 0-8 lagging to a load. The resistance and reactance per km of each conductor are 0-40 and 0-3 Q respectively. If the voltage at the supply end is maintained at 11 kv, calculate: (i) ceceiving end voltage (line-to-line) (ii) line current (ii) transmission efficiency. [(i) 10.46 kv (ii) 207 A (ii) 95%] 6). A short 3-0 transmission line with an…For the system as shown in the following figure, convert the components to same base voltage and apparent power, by choosing 100 kVA as the base kVA and 2000 V as the base voltage for the generators. Redraw the single line diagram with the new per unit values. 15 KVA 2000 V Z=j0.3 pu 25 KVA 2000 V Z=j0.15 pu G1 G2 35 KVA 2000/8000 V Z=j0.2 pu Z=30+j100 Z=60+j120 pu O pu leee 35 KVA 8000/2000 V Z=j0.3 pu 35 kVA 2000/8000 V Z=j0.25 pu G3 10 KVA 2000V Z=j0.35 pu M 30 KVA 2000 VQ2: The plant capacily of a 3-phase generating Station consists of three generators with rating as shown in Eig. IOMUA 12% IOMUA 12%. 5MUA 6% Fi 5HVA 5% 5성UA 5% The generators are connectecd to the station bus- bars from which load is taken through two 5MVA Step-up transformers each having a reactance 5%. Determine the maximum fault MVA. Which the circuit breakers on i) low voltage side and lii) high. Voltage Side may ha ve to deal with.