Homework Help is Here – Start Your Trial Now!
Engineering
Electrical Engineering
1) Explain the advantages of using per-unit in power system

1) Explain the advantages of using per-unit in power system

Introductory Circuit Analysis (13th Edition)
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...
See similar textbooks
icon
Related questions
Question

1) Explain the advantages of using per-unit in power system 
2) Explain how, it was useful in Question1 and Question 2 

Question 1 In the system shown below, the generator is ideal (Xç = 0) and the magnitude of the load bus voltage, V. is to be held at 11 kV. Working on a system base of 25 MVA and a base voltage of 10 kV at the load side: a) Draw the single-phase equivalent pu reactance diagram. b) Calculate the current I load in per unit c) Calculate the current I generator in A d) Calculate the Power in VA generated, consumed and lost Transformer 1 20 MVA 15KV: 60 kV X= 5% Transformer 2 20 MVA 50 kV: 11 kV X = 6% Line X= 200 Load S= 12 MVA pf = 0.85 lag VT1 VT2 VL
Transcribed Image Text:Question 1 In the system shown below, the generator is ideal (Xç = 0) and the magnitude of the load bus voltage, V. is to be held at 11 kV. Working on a system base of 25 MVA and a base voltage of 10 kV at the load side: a) Draw the single-phase equivalent pu reactance diagram. b) Calculate the current I load in per unit c) Calculate the current I generator in A d) Calculate the Power in VA generated, consumed and lost Transformer 1 20 MVA 15KV: 60 kV X= 5% Transformer 2 20 MVA 50 kV: 11 kV X = 6% Line X= 200 Load S= 12 MVA pf = 0.85 lag VT1 VT2 VL
Question 2. Given the single line diagram of a three phase balanced system. 1) Find the per-unit equivalent diagram, using Sbase=25MVA and Vbase Gen= 13.2KV. 2) Find the voltage at the generator end in KV if the voltage at the load terminal is 12kV full load and pf of 0.9. GENERATOR TRANSFORMER TRANSPORMER мотOR 15,000 KVA 13.0 kV 3E X" = 15 percent LINE X = 65 0 мотоя 13.8kV 10,000 kVA 25,000 kVA 25,000 kVA 25,000 kVA 3-phase 13.0 kV 13.2/69 kV 13.2/69 kV X" = 15 percent X" = 15 percent XL = 15 percent XL = 15 percent
Transcribed Image Text:Question 2. Given the single line diagram of a three phase balanced system. 1) Find the per-unit equivalent diagram, using Sbase=25MVA and Vbase Gen= 13.2KV. 2) Find the voltage at the generator end in KV if the voltage at the load terminal is 12kV full load and pf of 0.9. GENERATOR TRANSFORMER TRANSPORMER мотOR 15,000 KVA 13.0 kV 3E X" = 15 percent LINE X = 65 0 мотоя 13.8kV 10,000 kVA 25,000 kVA 25,000 kVA 25,000 kVA 3-phase 13.0 kV 13.2/69 kV 13.2/69 kV X" = 15 percent X" = 15 percent XL = 15 percent XL = 15 percent
Expert Solution
steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Analysis of Multiple Order System and Steady State Error
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Fundamentals of Electric Circuits
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:
9780078028229
Author:
Charles K Alexander, Matthew Sadiku
Publisher:
McGraw-Hill Education
Electric Circuits. (11th Edition)
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:
9780134746968
Author:
James W. Nilsson, Susan Riedel
Publisher:
PEARSON
Engineering Electromagnetics
Engineering Electromagnetics
Electrical Engineering
ISBN:
9780078028151
Author:
Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:
Mcgraw-hill Education,
SEE MORE TEXTBOOKS