what do you mean by Faults in Power System? Ellobrate short circuit and Open circuit faults?

Q: Why the sub-transient current of generator is high at the time of symmetrical fault?

A: Any failure in the normal operation of any system leads to fault. There are two types of fault:…

Q: 4 3. Show that when a single line-to-ground fault occurs in an ungrounded system, the neutral shift…

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Q: When a line to ground fault occurs, the current in a faulted phase is 100 A.What will be the zero…

A: In this question we will find zero sequence current for given fault....

Q: B/ A generator having a solidly grounded neutral and rated 50 MVA, 30 kV has positive, negative, and…

A: Consider the positive, negative and the zero sequence reactance is 0.25 pu, 0.15 pu and 0.05 pu…

Q: Write the definitions of subtransient fault current, momentary current and rated symmetrical short…

A: Sub-transient fault current - The sub-transient current is the AC current flowing in the generator…

Q: Line to line to line fault is an asymmetrical type of fault in power system which occurs very…

A: Given Line to line fault is an asymmetrical type of fault in power system.

Q: Write in detail about cable fault location using Varley loop test.With appropiate diagram.

A: Write in detail about cable fault location using Varly loop test. With appropriate diagram.…

Q: In sectionalized single bus bar system, each section can be completely shut down for maintenance by…

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Q: Critical clearing time of a fault in power system is related to steady state stability limit True…

A: Critical clearing time is the maximum time that is allowed to remove the disturbance without…

Q: O List FIVE (5) power system components that contribute to the fault current during operation.

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Q: 1. Explain the following terms with respect to the simple differential scheme: Circulating current,…

A: Differential protection relay is a relay whose functioning is based on the phase difference of two…

Q: Q3// Drive fault current for single line to ground fault- asymmetrical faults.

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Q: Keeping the opposition to current as low as possible in electrical bonding systems is necessary so…

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Q: Three fourth of the faults that take place in a transmission system is a. Zero sequence fault b.…

A: Different types of faults taking place on transmission line.

Q: Define protective zone and write down its significance. Why is zone overlapping ssary? Explain…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: Mention the faults that can occur on the CT/PT, Switchgear, Overhead lines and underground lines.

A: 1. symmetrical faults 2. unsymmetrical faults

Q: What is subtransient and transient fault current? How do they occur in a system?

A: In a system before the fault occurs voltage and current both are symmetrical AC but when a 3 phase…

Q: What is the significance of sub-transient reactance in the short circuit studies and what relation…

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Q: Question 2: A single-line diagram of the power system is shown in Figure 2, where negative- and…

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

Q: 7- What do you mean by pipelined ?

A: Given :   In the above given question they want to know the meaning of the pipelined.   Pipelining…

Q: Explain the Bus Bar protection using the Bus mechanism.

A: The bus zone fault occurs because of various reasons likes failure of support insulators, failure of…

Q: Draw the fault current direction both in Current transformer and operating relay coils for internal…

A: Question has asked for two protection systems and each system has multiple types of faults. As per…

Q: Give a brief description for under/over voltage time relay.

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Q: d) Discuss the procedure for computation of fault current in power system when a double line to…

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Q: What is solid grounding? For an underground neutral system explain the circuit behavior under single…

A: Solid grounding: The solid grounding refers to a situation in which the power system equipment like…

Q: A three-phase circuit breaker has a 15.5-kV rated maximum voltage, 9.0-kA rated short-circuit…

A: Given Data: Vmax = 15.5 kV I = 9 kA range factor K = 2.50

Q: draw sequence diagram for circuit-breaker example

A: The circuit breaker is a device that can make or break the circuit during the fault. The above…

Q: In a 3 phase, 3 wire system, it has normal voltage of 10.4kV line to line fault occurs at generator…

A: The positive sequence phase current for the 3- phase line to line fault current is evaluated as:

Q: Provided the bus-bar arrangement below, provide the following: a. Name the bus-bar arrangement; b.…

A: An electrical bus bar is  a conductor or a group of conductor used for collecting electric power…

Q: 6.     Which one is the most dangerous (more current carrying) type of asymmetrical fault?

A: This problem is from fault analysis in power system. The answer is given below

Q: what is bus impedance matrix ? how it is useful in symmetrical fault analysis?

A: Impedance bus matrix : Impedance bus matrix is a algorithm method to form a bus impedance matrix on…

Q: Line to ground fault has the highest probability in the power system True False

A: TRUE

Q: a power system what happens to phase voltages for a single line-to-ground fault as fault reactance…

A: Assume that fault occurs at phase 'a'  if three phase system  Although  fault phase voltage…

Q: 8. How do you differentiate between normal neutral plane ? (DC GENERATOR QUESTION)

A: The normal neutral planes are: GNA - Geometrical neutral axis MNA - Magnetic neutral axis

Q: 2. Discuss the performance of an ungrounded system during a line-to-ground fault.

A: System grounding connects a current-carrying component of an electrical system to the ground:…

Q: i)  An equation for the fault current when a single-line-to-ground fault occurs ii) derive an…

A: Single line to ground fault is  a unsymmetrical fault .

Q: In reference to the load, how are MOVS connected to help prevent voltage spikes and surges? Are MOVS…

A: MOVs (Metal oxide varistors) is a variable resistor whose resistance is changed with respect to…

Q: A three-phase circuit breaker hasa15.5-kV rated maximum voltage, 9.0-kA rated short-circuit current,…

A: a) The three-phase circuit breaker has the maximum voltage =15.5 kV Calculate the minimum voltage:…

Q: Derive an expression for fault current for single line-to-ground fault by symmetrical components…

A: There are three different questions posted here which is against Bartleby guidelines please post it…

Q: Explain why sometimes Customer Average Interruption Duration Index (CAIDI) increases when redundancy…

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Q: Describe the generator control Schemes for wind electric Schemes

A: Wind generators function on a easy principle. The electricity within the wind turns  or three…

Q: A salient-pole generator without dampers is rated 20 MVA, 13.8 KV and has a direct-axis subtransient…

A: In this question we need to find a the zero sequence voltage during single line to ground fault.

Q: Contribution of fault analysis in power system netwrok?

A: Solution- Contribution of fault analysis in power system network- Fault analysis of a power system…

Q: Why are circuit breakers and fuses ineffective in protecting against transient over voltage due to…

A: The operation of the circuit breakers are at a speed of the 50 milli-second. But this speed is very…

Q: Line to line to line fault is an asymmetrical type of fault in power system which occurs very…

A: Choose the correct option The given Statment Line to line to line fault is an asymmetrical type of…

Q: Explain prevention of Arc restriking Theories in circuit breaker.

A: Solution: There are two theories regarding the prevention of arc restriking.   1. Splepian theory or…

Q: What are the types of surge diverters, explain any two?

A: Given: Types of surge diverters.

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.