Q2//For the electrical system shown in fig (1). It is assumed CB5 and CB6 suddenly opened, and only CB5 re-closed after fault clearing. Draw on same graph the power-angle characteristics for pre-fault ,during fault and post fault conduction. Also show The area of the acceleration and deceleration

Q2//For the electrical system shown in fig (1). It is assumed CB5 and CB6 suddenly opened, and only CB5 re-closed after fault clearing. Draw on same graph the power-angle characteristics for pre-fault ,during fault and post fault conduction. Also show The area of the acceleration and deceleration

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

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.

Question

y
Pm=0.8 XT1=0.3
Eg-1.65
Xg=0.3
CB1
CB2
-0
CB3
HOFF
CB4
0
XL1=XL2=0.4
XT2=0.3
∞
Fig(1)
CB5
C86
HO
CB8
CB7
CH
CB9
XL3=XL4=0.5
X13-0.3
Infinite bus
V=1 PU
H-SMJ/MVA
Q2//For the electrical system shown in fig (1). It is assumed CB5 and CB6
suddenly opened, and only CB5 re-closed after fault clearing. Draw on same
graph the power-angle characteristics for pre-fault ,during fault and post fault
conduction. Also show The area of the acceleration and deceleration

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Step 1: Given that

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Step 2: Analysis of the circuit before fault

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Step 3: Analysis of the circuit during fault

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Step 4: Analysis of the circuit after fault

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Step 5: Power flow diagram of the system

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