5. Determine the bus admittance matrix [Ybus] of the representative power system shown in Figure 5. Data for this system is given in Table 5. Fig.5 One line diagram of the power system Table: 5 Line charging y/2 0.03 0.025 0.020 Bus code l-k Impedance, Z 0.02 +0.06 0.08 + 0.24 1-2 1-3 2-3 0.06 +0.18

5. Determine the bus admittance matrix [Ybus] of the representative power system shown in Figure 5. Data for this system is given in Table 5. Fig.5 One line diagram of the power system Table: 5 Line charging y/2 0.03 0.025 0.020 Bus code l-k Impedance, Z 0.02 +0.06 0.08 + 0.24 1-2 1-3 2-3 0.06 +0.18

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.60P: PowerWorid Simulator case Problem 3_60 duplicates Example 3.13 except that a resistance term of 0.06...

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The figure below shows the one-line diagram of a four- bus power system. The voltages, the scheduled real power and reactive powers, and the reactances of transmission lines are marked at this one line diagram (The voltages and reactances are in PU referred to 100 MW base. The active power P2 in MW is the last three digits (from right) of your registration number (i.e for the student that has a registration number 202112396, P2 =396). [10] Starting from an estimated voltage at bus 2, bus 3, and bus 4 equals V2 (0) = 1.15<0°, V3 = 1.15 < 0°, V4 1.1< 0°. 1- Specify the type of each bus and known & unknown quantities at each bus. 2- Find the elements of the second row of the admittance matrix (i.e. [Y21 Y22 Y23 Y24]). 3- Using Gauss-Siedal fınd the voltage at bus 2 after the first iteration. 4- Using Newton-Raphson, calculate: |- The value of real power (P2), at bus 2 after the first iteration. Il- The second element in the first row of the Jacobian matrix after the first iteration. 2 P2…
Bus bar system which ensures continuity of supply during maintanence is ... ... O single bus bar O duplicate bus bar O single bus bar with sectionalization O single bus bar without sectionalization
In a DC optimal power flow problem of 3 bus network. The flow on lines was found to as follow: f12=100 M, MW, f13=150 MW, and f23 =120MW. The lines limits are 140 MW each. and the system base MVA =10OMVA. What additional constraint to be added on the solution of the DCOPF Select one: O a. None of these O b. 100 (0, - 02)/x12= 150 Oc. 100 (0, - 03)/x13= 140 O d. 100 (0, - 03)/x13= 160 O e. 100 (0, - 03)/x13= 130 O f. 100 (0, - 03)/x13= 150
a. i. Why do power systems operate in an interconnected arrangement? ii. How is the frequency controlled in a power system? iii. What is meant by the stiffness of a power system? b. Two 50 Hz power systems are interconnected by a tie-line, which carries 1000 MW from system A to system B, as shown below. After the outDage of the line shown in the figure, the frequency in system A increases to 50.5 Hz, while the frequency in system B decreases to 49 Hz. i. Calculate the stiffness of each system. ii. If the systems operate interconnected with 1000 MW being transferred from A to B, calculate the flow in the line after outage of a 600 MW generator in system B. 1000 MW A В
Figure below shows the one line diagram of a 3-o system. By selecting a common base of 100 MVA and 22 KV on the generator side, draw an impedance diagram showing all impedances including the load impedance in per unit. The data are given as follows: G: 100 MVA, 22 KV, X= 0.18 pu 22/220 KV, X= 0.1 pu TR1: 50 MVA, TR2: 40 MVA, 220/11 KV, X=0.06 pu Load 1: 50 MVA, 0.8 pf lag Load 2: 50 MVA, 0.8 pf lead If volt at bus 4 equal 11 KV constant value : calculate i) volt at bus 1 ii) EMF (Eg) of generator ii) Transmission line current TR1 TR2 ZTL=j80 2 G1 3. 4 Load 1 Load 2
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…
PowerWorid Simulator case Problem 3_60 duplicates Example 3.13 except that a resistance term of 0.06 per unit has been added to the transformer and 0.05 per unit to the transmission line. Since the system is no longer lossless, a field showing the real power losses has also been added to the oneline. With the LTC tap fixed at 1.05, plot the real power losses as the phase shift angle is varied from 10 to +10 degrees. What value of phase shift minimizes the system losses?
Consider the single-Line diagram of a power system shown in Figure 3.42 with equipment ratings given: Generator G1: 50MVA,13.2kV,x=0.15p.u. Generator G2: 20MVA,13.8kV,x=0.15p.u. Three-phase -Y transformer T1: 80MVA,13.2/165YkV,X=0.1p.u. Three-phase Y- transformer T2: 40MVA,165Y/13.8kV,X=0.1p.u. Load: 40MVA,0.8PFlagging,operatingat150kV Choose a base of 100 MVA for the system and 132-kV base in the transmission-line circuit. Let the load be modeled as a parallel combination of resistance and inductance. Neglect transformer phase shifts. Draw a per-phase equivalent circuit of the system showing all impedances in per unit.
Bus bar system which ensures continuity of supply during maintanence is ............ O duplicate bus bar O single bus bar without sectionalization O single bus bar O single bus bar with sectionalization
Please help me with my homework. Thanks! The course subject is Fundamentals of Electronic Communications. 4. A 400 W carrier is amplitude modulated to a depth of 100%. Calculate the total power in case of SSB technique. How much power saving (in W) is achieved for SSB compared to standard
Question 3a) The Electricity Company of Ghana (ECG) has noticed two different values of voltagebetween the No-load Voltage and the load Voltage aa the end of one of their distribution feeders. One is 80% and the 4other is 2%. Which of these two values would you recommend to ECG to use and why? b) An Electrical Power Generation Company has engaged you as their consultant for you to advise them on their Synchronous generators. During a peaking load situation which occurred between 5pm to 8pm, the generators experienced transient stability challenges that lead even to some of the generators shutting down. You have been called upon to provide five (5) engineering answers that would cause the problems.
7. In the circuit below write the loop equations and set up (not solve) the matrix equation for the load current. Wiso 150 75 28 100