2.26 Find i, v, and the power dissipated in the 6-2 resistor in Fig 2.90. 9 A

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…

1. A battery of EMF 6 V has an internal resistance of 0.150. Calculate its terminal p.d. when delivering a current of 0.5 A. 2. State Ohm's Law. Use this law to find the value of a Resistance of an electric circuit which has a Voltage of 220 V and a current of 20A

PRACTICE PROBLEM 2.13 For the circuit shown in Fig. 2.45, find: (a) vi and v2, (b) the power dis- sipated in the 3-k2 and 20-k2 resistors, and (c) the power supplied by the current source. 1 k2 Answer: (a) 15 V, 20 V, (b) 75 mW, 20 mW, (c) 200 mW. ww рrаc 2-13 2-13 jpg) 3 k2 10 mA 5 k2 20 k2 Figure 2.45 For Practice Prob. 2.13. 7 ww