Explain the following terms in the distribution system 1) demand interval, 2) diversified demand, 3) demand factor and 4) single bus bar system.
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- Most buses in a typical power-flow program are a.voltage controlled bus b.PQ bus c.PV bus d.Slack bus 2-The power-flow problem is the computation of voltage magnitude and phase angle at each bus in a power system under balanced three-phase steady-state conditions. False True 3-The following sequence currents were recorded in a power system under a fault condition Ipositive=j1.5pu, Inegative=–j0pu, Izero=– j0pu. The fault is a.Three-phase b.Double Line to ground c.Line to ground d.Line to line 4- he following sequence currents were recorded in a power system under a fault condition Ipositive=j1.5pu, Inegative=j0pu, Izero=j0pu. The fault is a.Three-phase b.Double Line to ground c.Line to ground d.Line to line i uploded the houndots (book )here :https://seomidea.com/hct/nu.pdfTo qualify system stability, we use: a. Routh criterion b. Phase margin c. Gain and phase margin d. Gain marginExplain the following terms in the distribution system 1) demand interval, 2) diversified demand, 3) demand factor and 4) single bus bar system.
- Draw a radial distribution network feeder (11 kV), with 5 busbars/distribution substations, explain in what case there is a voltage rise problem: i) with the aid of a diagram showing load flow direction and voltage profile with simple calculations (ignore the power losses on the feeder); ii) list three possible solutions to reduce voltage rise issues, and explain using the voltage drop equation.Which of the following cannot be determined with the help of load flow analysis?a) frequency of busbar voltagesb) active and reactive forcesc) phase angle of busbar voltagesd) loss of strengthe) amplitude of busbar voltagesSolve numerical : Following figure shows the one-line diagram of a two bus system. Take bus 1 as slack bus, bus 2 as load (PQ) bus. Neglect the shunt charging admittance. Obtain the bus admittance matrixYBUS and find V2 and δ2, power flows and line losses by using Fast decoupled power flow method. All the values are given in per unit on 100MVA base. Use a tolerance of 0.001 for power mismatch.
- Following figure shows the one-line diagram of a two bus system. Take bus 1 as slack bus, bus 2 as load (PQ) bus. Neglect the shunt charging admittance. Obtain the bus admittance matrixYBUs and find V₂ and 62, power flows and line losses using FDLF method. All the values are given in per unit on 100MVA base. Use a tolerance of 0.001 for power mismatch. 1 Z12= 0.12+10.16 Slack bus V₁ 1.0/0⁰ pu 2 PL2=1.0pu Q12=0.5puExplain the following terms in the distribution system 1) maximum demand, 2) coincident demand, 3) utilization factor and 4) single bus bar systemElectrical Engineering Design a power system network consists of the following: į, 2 generators ii. 2 transformers iii. 2 transmission lines iv. Suitable number of busbars Then, for the designed network, perform the following: j. Load flow analysis. You must clearly identify the bus type to perform this. ii. Fault analysis – Balanced and unbalanced faults Next, perform manual calculations for the following: i, Load flow analysis using either Gauss Seidel or Newton Raphson Method. ii. Fault analysis (balanced and unbalanced faults) on any one fault point.
- a) Find the Y-bus power system in rectangular and polar coordinates.b) Specify the type of each bus, and the known/unknown values. c) What is the real and reactive power injections at buses 2 and 3?A DC Optimal Power Flow problem is to be solved for a 3-bus network. The per-unit reactances of the lines interconnecting the buses are as follows: X12 = 0.25 pu, X13 = 0.15 pu and X23 = 0.2 pu. There is a generator at each bus. The loads at buses 1, 2 and 3 are 125 MW, 300 MW and 100 MW respectively. Bus 1 is taken as the reference bus, and SBase = 100 MVA. Which one of the below is NOT a constraint of the DCOPF problem? Select one: O a. -400 02 - 666.67 03 = P, - 125 O b. None of these C. -500 02 - 1166.67 03 = P3 - 100 d. 900 02 - 500 03 = P2 - 300A DC Optimal Power Flow problem is to be solved for a 3-bus network. The per-unit reactances of the lines interconnecting the buses are as follows: X12 = 0.1pu, X13 = 0.12 pu and X23 = 0.2 pu. There is a generator at each bus. The loads at buses 1, 2 and 3 are 150MW, 200mw, and 100MWrespectively. Bus 1 is taken as the reference bus, and SBase = 100 MVA. Which one of the below is a constraint of the DCOPF problem? Select one: O a. None of these O b. -500 0₂-1000 03 = P3 - 110 O c. 1500 0₂-500 03 = P₂ - 220 O d. 1500 0₂-500 03 = P₂ - 200 O e. -500 0₂-1000 03 = P3 - 150 O f. -1500 8₁-1000 03 = P₁ - 150