2. The single-line diagram of a power system is shown in Figure A1-2 below. The three-phase power and line-line ratings are also given below: G: 60 MVA 20 kV X= 9% T1: T2: 50 MVA 20/200 kV X= 10% 50 MVA 200/20 kV X= 10% M: 43.2 MVA 18 kV X= 8% Line: 200 kV Z = 120 + j200 2 (a) Draw an impedance diagram showing all impedances in per unit on a 100-MVA base. Choose 20 kV as the voltage base for generator. (b) The motor is drawing 45 MVA, 0.80 power factor lagging at a line-to-line terminal voltage of 18 kV. Determine the terminal voltage and the internal EMF of the generator in per unit and in kV. T2 2 Vm Line G M Figure A1-2

Q: Q. No. 01 [CLO1-C3]: Draw an impedance diagram for the electric power system shown in Figure-1,…

A: We can obtain the impedance diagram by using below steps: -  The base voltage VBG1  on the LV side…

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Q: None

A: 1. Basics of Three-Phase Power:Definition: Three-phase power is a method of electrical power…

Q: The three-phase power and line-line ratings of the electric power system shown in Figure-1 are given…

A: Given: G1:82 MVA 30 kV X=10% T1:72MVA 30/300 kV X=11% T2:72MVA 300/30 kV X=11% M:62MVA 25 kV X=9%…

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A:

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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.