Power system

Q: Discuss the advantage and disadvantage of each connection. Generator reactor Tie-bar…

A: The advantage and disadvantage is given below of the following : Generator reactor: Disadvantage:…

Q: An 22kV, 100 MVA alternator is provided with differential protection. The percentage of winding be…

A:

Q: 1. How does the load-sharing of the two transformers appear when the load changes during parallel…

A: 1.This is the case when if the two transformers are connected in parallel, then load sharing…

Q: Which of the following is not an effect of power interruption? Select one: A. Accidents…

A: Solution :Given Topic :Power failure/interruption.Find:=> Here Select option this is not effect…

Q: Investigate the principles of predictive maintenance in power substations and how it can prevent…

A: Predictive maintenance in power substations is a proactive approach to managing and maintaining…

Q: In pumped hydro storage, the maximum power output in the turbine generator mode is usually greater…

A: Ans . True

Q: question, 1. Is the load current IL [A] equal to the sum of current I1,I2 flowing to each…

A: Both the transformers are of equal rating. Same input is connected to the primary windings of both…

Q: The plant capacity of a three phase generating station consists of two 15,000 kVA generators of…

A:

Q: Briefly explain about single phase and three phase power supply with diagrams.

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Q: 2. A generator has reactance of 0.25 p.u. based on 18 kV 500 MVA. The generator is connected to a…

A: In this question,  We need to determine the value of the Reactance of the generator.  We know  P…

Q: Match the items in List - I with the items in List - II and select the correct answer using the…

A: The list in the table,

Fault Analysis

In an electrical engineering system, a fault is an abnormal electric current flowing through the system, and fault analysis is the study of these faults. For instance, a short-circuit is a fault where the live wire touches the ground or neutral wire. If a circuit is interrupted by a failure of a current-carrying wire then an open circuit fault occurs. The open-circuit faults are also called series faults. One or more phases or ground may be involved in a three-phase fault or may occur only between two phases. Current flows into the earth in case of a ground fault or earth fault. For most situations, the prospective short circuit current of a fault that is predictable can be calculated. To limit the loss of service because of a failure, the protective devices can detect fault conditions and operate circuit breakers and also other devices. All phases equally can be affected in a poly-phase system which is known as symmetric electrical fault. The asymmetric fault becomes more complicated to analyze if only some phases are affected. By using methods such as symmetrical components, the power system analysis of these types of faults is often simplified. The main objective of power system protection is to design, detect, and interrupt power system faults.