For the shown balanced and negative sequence three phase system, given that Vca 426< 57° Vrms and Zp= 1.2<4° 0, the value of Icc is: a (+21) n C b A 12+ a. 305 <83 Arms b. 205 83 Arms c. 205 123 Arms d. 396 64 Arms e. 305 160 Arms 1 B Z, N Zp L
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- Solve it quickly please4. A 4160V, three phase source, 4-wire supplying an unbalanced three phase load. The unbalanced connected load are: Zan = 150/53.13° ; Zbn = 150-53.13° ; Zen = 1500° Assuming positive sequence and the reference is the line voltage "a", determine: a. the line current "a" b. the line current “b” c. the line current "c". d. the total real power e. the total reactive power f. the total apparent power g. the overall power factor. h. the neutral current.Power in a three phase delta system with balanced load is equal to (Sqrt (3)) (VL) (IL) (p.f.) (Sqrt (3)) (Vph) (Iph) (p.f.) (Sqrt (3)) (VL) (Iph) (p.f.) O (Sqrt (3)) (Vph) (IL) (p.f.)
- In a given system of base power of 250 MW, and bus 3 is taken as reference. The per-unit reactances are X₁2 = 0.2 p.u., X13 = X23 = 0.1 p.u. If the power flow in the system is given as: PF12 = 100 MW, PF13 = 50 MW, PF23 = -150 MW, then the phase angles are Select one: O a. 0₁ = 0.02 rad., 0₂ = 0.06 rad., 03 = 0 rad. O b. None of these O c. 8₁ = 0.02 rad., 02 = -0.06 rad., 03= 0.1 rad. O d. 0₁ = 0.02 rad., 02 = -0.06 rad., 03 = 0.2 rad. O e. 8₁ = 0.02 rad., 8₂ = -0.06 rad., 03 = 0.1 rad. O f. 0₁ = 0.02 rad., 02 = -0.06 rad., 03 = 0 rad.A balanced, 3-phase, 346.41 Vrms line voltage source feeds two loads connected in parallel with a 3-phase line with j3ohm/phase impedance.The first load is Y (star) connected and has an impedance of 12ohm/phase.The second load is D (delta) connected and has an impedance of 12ohm/phase.Taking the Van phase voltage as reference: a)Find the current, active power and reactive power provided by the source. b)Find the phase and line voltages on the loads c)Find the phase currents for each load d)Find the active and reactive power in each load. e)Find the active and reactive power loss in the line f)Show whether the total active and reactive power provided by the source is equal to the total active and reactive power in each load and line.Problem 4- A large 3-phase industrial load draws 3.6 MVA at 0.85 power factor lagging from through a three- phase 12.47/7.2 kV 3-wire overhead distribution line. The phase conductor is #1 ACSR “Robin". Taking 3.6 MVA and 12.47 kV as base values, determine (a) The base impedance in (N) (b) The reactive power drawn by the load (p.u.) (c) The total current (p.u.) drawn from the power supply
- 3. A three phase source, 4-wire having a per phase voltage of 230V. An unbalanced load is connected to the three phase source. The load impedances are: Zan = 15253.13° N; Zbn = 152-53.13° ; Zen = 150° Assuming negative sequence and the reference is the phase voltage "a", determine: a. the line current "a" b. the line current “b” c. the line current "c". d. the total real power e. the total reactive power f. the total apparent power g. the overall power factor h. the neutral current.Q2 Bbbbbbbbbbbbbbbbbconsider the following diagram of impedances in per unit of a common base a) get the YBUS admittance array and the ZBuz impedance array 213-j2 pu zt2-j0.15 zg2-j1.85 791-j0.9 211-0.1 1 212-j0.5pu 223-j0.5pu Va 1 p.u. Jv1-1p.u. 22-10 pu
- Shown are two buses connected via a transmission line. Connected to Bus 1 is a generator(modelled as a voltage source V1), and to Bus 2 is a generator( with Voltage V2) and a load. The line impedance Z = R + jX is not known. Three-phase load is forecasted as 100MW + 60MVar. Generator at Bus 2 is scheduled to deliver 40MW and its excitation is adjusted for the machine to deliver 55 MVar. Voltage at Bus 1 is 241 KV angle 10 deg, while voltage at bus is 230 kV; use V2 as the reference for all angles. 1. What is the current (RMS) in amperes drawn by the load connected to Bus 2? 2. How much real power (in MW) is delivered by the generator connected to Bus 1? 3. What is the total real power loss along the line, in percent of the load? 4. What is the X/R Ratio of the line impedance?2. Determine Zbus for the system whose reactance diagram is shown in figure below, where the impedance is given in p.u preserve all the three nodes. soes j0.25 j0.05 j1.0 j1.25 Reference bus2. A 4160 V, three-phase, wye-connected 6 MVA synchronous generator has a synchronous reactance of 1.2 2 and is connected to a 4160 V three-phase bus. In this problem, you will draw a set of V curves, with Ea on the horizontal axis. For each eurve, you must identify numerically the following points: minimum Ea with corresponding Ia:; minimum Ia with corresponding Ea. (The remainder of the curves may be drawn freehand.) Plot V curves corresponding to: a. Zero active power b. 6 MW output (total three-phase)