The load connected to a certain bus is treated as Select one: a. Constant current injected to the bus b. Constant P and $|V|$ c. Constant Q and $|V|$ d. Constant P and Q
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Step 1: The load connected to a certain bus can be treated as either a constant current injected to the bus, constant P and IVI, constant Q and IVI, or constant P and Q. Show more…
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2. A load L consuming 1 p.u. of active power and 0.5 p.u. of reactive power is connected to a generator G1 through a transmission line with Z = 0.02 + j0.06 p.u. Also, there is a capacitor connected to the load bus with admittance Ycap = j0.25 p.u. The generator voltage is VGl = 1∠0. a) Draw the one line diagram of this system indicating clearly all the elements referenced above. b) Write the admittance matrix Ybus for this system. c) Write the power flow (both real and reactive) equations (for the load bus) in this system. DO NOT SOLVE!
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Show the micro-operations of using (One-bus system, Two-bus system, Three-bus system) of the following instructions a. Instruction subtracts the contents of memory location X from register R1 and stores the result in R1 (R1 ← R1 – M[X]) Sub X , R1 b. Fetching an instruction (Assume next instruction is at PC+4) c. Add R2 , R1 (R1 ← R1 + R2) d. Add #100 , R1 (R1 ← R1 + 100)
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7.18 (a) The bus impedance matrix for a three-bus power system is Zbus = j [0.12 0.08 0.04; 0.08 0.12 0.06; 0.04 0.06 0.08] per unit where subtransient reactances were used to compute Zbus. Prefault voltage is 1.0 per unit and prefault current is neglected. (a) Draw the bus impedance matrix equivalent circuit (rake equivalent). Identify the per-unit self- and mutual impedances as well as the prefault voltage in the circuit. (b) A three-phase short circuit occurs at bus 2. Determine the subtransient fault current and the voltages at buses 1, 2, and 3 during the fault. (c) Repeat for the case of Zbus = j [0.4 0.1 0.3; 0.1 0.8 0.5; 0.3 0.5 1.2] per unit
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