Figure 1 shows the schematic diagram of a three phase radial transmission system. The ratings and reactance of various components are as shown, along with the nominal transformer rated line voltage. Convert the schematic into an equivalent per unit circuit by using a base of 250 MVA and voltage reference as 40 kV at Zone C. Subsequently, calculate the new per unit reactance for all zones and load current at the receiving busbar.

Q: An AC three phase distribution system (given in Figure 2), which has end user with balanced three…

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Q: determine the per-unit impedances and the per-unit source voltage. Then cal- culate the load current…

A: Electricity moves through a single conductor in a single-phase connection. The three independent…

Q: A three phase Y/A transformer rated at 50 MVA, 230/34.5 kV is to be protected using biased…

A:

Q: A 33 KV substation is to be connected to a 11 KV stepdown substation which is at a distance of 1.5…

A: We have Transmission line which connects 33 KV Sub-Station to 11 KV Substation. This line is 1.5 KM…

Q: Q3/A/ Fill in the blanks: 1. The most common type of 3-phase unsymmetrical fault is 2. In a balanced…

A: The solution is given below

Q: A fault occurs at bus 4 of the network shown in Figure Q3. Pre-fault nodal voltages throughout the…

A: x=1y=7Note: reactance of element right to bus 4 is not given. Hence we will not consider that in…

Q: Q5 The single-line diagram of a three-phase power system is shown in Figure Q5a, with equipment…

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Q: 1_ For an unbalanced load connected to a yy transformer, what would be the form/ shape of the output…

A: According to the question we have to discuss about, For an unbalanced load connected to a yy…

Q: A 40000-KVA, 25000-V/600-kV, single phase transformer has the following series impedances: Z1=…

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Q: Calculate the cantilever equivalent-circuit parameters as referred to the transformer high-voltage…

A: I have solved for both parts

Q: Three single-phase two-winding transformers,

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Q: Problem 6 a- Explain the reasons for applying system grounding in electric power systems. Consider…

A: The current flowing through a circuit during a fault condition is called fault current. Fault types…

Q: 7. Two similar star-grounded synchronous generators, one of which has its star point grounded,…

A: The nature of the fault current is mostly inductive reactive in nature. The flux produced by the ac…

Q: b) A fault occurs at bus 2 of the network shown in Figure Q3. Pre-fault nodal voltages throughout…

A:

Q: The faults which give rise to unsymmetrical currents (unequal line currents with unequal…

A: The above statement is incorrect or false.

Q: 6)  A circuit consisting of a resistor in series with an inductance takes 210W at a power factor of…

A: We assume the voltage to be at base angle zero. V=50∠0°, I=7∠-53.13°, R=4.29Ω (d) The impedance is…

Q: The results of open-circuit test and short-circuit test for a 60 kVA , 2400/500 V single phase…

A: In this question, open-circuit test and short-circuit test for a 60 kVA , 2400/500 V single phase…

Q: Find the cross correlation of functions sin o t and cos ot

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Q: E = 1.35460 0}} jol X'=j0.15 jous 0 + 11 jous V = 120⁰:1.0 V=ILO

A: In this question we need to check the system remains stable after one circuit of the lines is switch…

Q: b) A fault occurs at bus 4 of the network shown in Figure Q3. Pre-fault nodal voltages throughout…

A: POWER SYSTEM: A power system is a network of electrical components that provide, transmit, and…

Q: b) The single line diagram of a power system is shown in Figure Q2.1 including generator and…

A: Givenlength of line =50 kmMVA base = 100 MVAFor line , base voltage =11 kV

Q: (b) Given the two-machine system of Figure Q2 (b), a base voltage of 132 kV for the transmission…

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Q: 8. A three-phase 50 Hz, 200 MVA, 220/66 kV transformer has a clock number of Yd11. The transformer…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: In the single line diagram shown below, generators G₁ and G₂ have a leakage reactance of 0.26 per…

A: Given single line diagram, Ratings of the generator G1 and G2, 66.5 MVA11 kV0.26 pu

Q: A 50 MVA, 3-phase, 115 kV (Grounded Y) - 34.5 kV (Delta) transformer is delivering a 40 MW load at…

A: Distribution line is connected to transformer at one end and load at other end as shown below

Q: Figure below shows a power system where load at bus 5 is fed by generators at bus 1 and bus 4. The…

A: When line L1 has length =100 km, fault current for fault at bus 5 is =2530 A When line L1 reduced to…

Q: A single line diagram of a small power system is shown below. The corresponding reactances…

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Q: Please answer this diligently. Other answers in the internet seems wrong. Please help me understand…

A: First, we need to calculate the base current. The base current (Ibase) can be calculated using the…

Q: 2. The impedance of a 10 MVA, 22/220 kV transformer is 0.2 per unit. What is this impedance in per…

A: In a transformer, Base KVA, Sbold=10 MVA. Base voltage on LV side, Vb(old)=22 kV. Old impedance,…

Q: The single line diagram of a power system is shown in Figure Q2.1 including generator and…

A: Given length of line =50 km MVA base = 100 MVA For line , base voltage =11 kV

Q: Mention the types of iron cores in the transformers and the effect of the shape of the iron core in…

A: Iron Cores are also part of  transformers

Q: A three-phase, 100-MVA, 20-kV generator is connected to a three-phase, 100-MVA, 20-kV motor through…

A: The short-circuit current can be determined using the formula I = V / (Xg + Xl + Xm) where I is the…

Q: A fault occurs at bus 4 of the network shown in Figure Q3. Pre-fault nodal voltages throughout the…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: A three-phase load of 10 A (power factor 0.8 (end)) is fed from point “1” 600 m away from a…

A: (a) The active and reactive current distribution -

Q: 1. Raising the transmission voltage and reducing the resulting transmission currents by a factor of…

A: We need to select correct option regarding given statement about transformer .

Q: Figure below shows a power system where load at bus 5 is fed by generators at bus 1 and bus 4. The…

A:

Q: j0.15 요 j0.15 오 j0.25 2 j0.3 2 j0.15 오 G) Loffer j0.25 2

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Q: / Short circuit test on a single phase transformer is performed to determine_____________ a.…

A: Given that Short circuit test on a single phase transformer is performed to determine_____________

Q: A 3-phase generator (30 MVA, 13.8 KV, 0.15) supplies two motors (rated at 20 MVA, 12.8 KV, 20%, and…

A: The one line diagram is shown below voltage in transmission line circuit=13.8×11513.2=120.23 kV…

Q: What is the definition of zero sequence impedance in transformer? What is the benefit of zero…

A: Transformer: A device which transfer a electrical energy from one circuit to another circuit…

Q: Which of the following is/are true? a) Base current is proportional to base VA b) Base VA is the…

A: In this question , 4 statements is given about transformers..We have to find out which is true.

Q: 3.8. Three identical 9-MVA, 7.2-kV/4.16-kV, single-phase transformers are con- nected in wye on the…

A: The above problem is solved by using per unit system. The detailed solution is given in the next…

Compensation Techniques

The compensation techniques are the methods that are employed in the electrical control systems to enhance the performance of the system. The performance are generally affected by the factors like lag in the compensating devices, slow response of the system of the components like sensors used in the control system. The basic compensation technique involves lag compensation, lead compensation or the combination of the both.