2. A group of 20 trunks was found to have ten trunks engaged at 10 a.m., 15 at 10.10 a.m., 16 at 10.20 a.m. and 11 at 10.30 a.m. Calculate the average traffic intensity during this period.
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- QUESTION 3 The power system network is shown in Figure 3. The magnitude of voltage at bus 1 is adjusted to 12 0° per unit, buses 2 and 3 are the load buses. Line impedances are marked in per-unit on 100 MVA base and the charging susceptances are neglected. Determine the bus voltage at load 2 and 3 using the Gauss-Seidel iteration method (accurate to four decimal places). Perform calculation for two iterations. jo.033 P= 400 Mw HQu= 320 MVar Vi = 120° Figure 3 10.05 +P= 300 MW 70.0125 +QF 270 MVarQUESTION-1: In the radial network shown in the figure below, bus 1 voltage is 1.05 pu. Calculate: a) Current for a 3-phase to ground fault at bus 3. b) Current for a 3-phase to ground fault at bus 5. 1 2 3 4 5 6 j0.2 j1.0 j1.3I j1.7 1.0520 j0.6 j0.4Given the 4 bus network shown below, assume that there are no loads and all buses are at the rated voltage and all have the same phase angles. Assume that shunt capacitances are neglected. The relevant transient reactances for the generators and the reactances for the transformers are shown. Solve for the fault current through the fault impedance for a fault at bus 4 with a fault impedance of j0.1 pu. HINT: Use Delta to Wye conversion.
- Refer to Figure 1. Using its equivalent reactance diagram, what is the total impedance of the system up to the fault point at the end of the receiving line (in per unit)? Below are the parameters: G1 : 9 MVA, 13 kV, j0.11 p.u. G2 : 8 MVA, 13 kV, j0.06 p.u. T1 : 9 MVA, 13/69 kV, j0.042 p.u. TL : 262 km, 0.031 ohm per km, 0.3 ohm per km, operates at 69 Base values are that of G1. Round your answer to 2 decimal places. what is the fault MVA of the system when a three-phase fault occurs at the receiving end?The LLLG fault occurs at bus-8with pre-fault voltage as 1.02 p.u. If the positive sequence impedance at bus-8 is j0.15 and positive sequence current is -j1.125. which one of the following values will be the value of zero sequence voltage at bus 8? Select one: a. 1.3125 O b. 0 O c. 0.7587 O d. 0.3125pls solve the problem in less than 30 min.
- In a 7-bus system, the double line fault is occurred at bus -5. During fault the positive sequence potential difference between the bus-4 and bus-1is found to be 0.0175. what is the line impedance which is connected between bus-4 and bus-1 if the current flowing through transmission line is -j 0.148? Select one: O a. -jo.182 O b. +j0.1182 O c. -jo.1182 O d. +j0.182Find the line fault current of the feeders shown in the figure and the T.S.M of Relay 2. Knowing that actual time of operation of Relay 2 is 1.4 Sec, the time margin between the two relays is 0.6 Sec, and the time setting multiplier (T.S.M.) of Relay 1 is 0.4. Use the I.D.M.T curve shown below. Bec 500/5 00/S CB2 Relay 2 160% Relay 1 120% PSMPlease answer this diligently. Other answers in the internet seems wrong. Please help me understand and solve this problem. I'll give a like. Thanks! Isc = __________; MVAsc = __________
- fon alan at Q.1 (a) (b) (i) (c) (i) SEEE/SKEE 4443 (ii) Explain briefly why the Newton-Raphson method is used for large power system? WIT (1) What is the purpose served by power flow analysis? What is Short Circuit Capacity (SCC)? (ii) Using suitable diagram, explain how Thevenin Theorem can be applied in symmetrical fault calculation. What is the magnitude of the neutral-to-ground impedance ZN for a Y connected generator in a zero-sequence diagram? Explain briefly. (ii) Using a symmetrical component method, prove that the fault current for a double line to ground fault, I 31aoStudent Number: 1700123A smaller lagging reactive power drawn by a circuit, consists of_________ power factor Smaller zero greater not effects