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Per Unit Analysis for Single and Three Phase Systems
Rating: 4.7 out of 5(50 ratings)
362 students

Per Unit Analysis for Single and Three Phase Systems

"Per Unit Analysis", another tool to help analyze power systems and aid in understanding equipment specifications
Created byGraham Van Brunt P. Eng., B.Sc.
Last updated 9/2018
English

What you'll learn

  • In this course, you will learn exactly what Per Unit Analysis is and how manufacturers of equipment use it to rate their equipment.

Course content

1 section • 13 lectures • 6h 5m total length

  • 00 Intro (R1)5:54
  • 01 Per Phase Analysis (R1)33:33
  • 02 The Normalization Process50:29
  • 03 A Single Phase PU Example (R1)10:18

    Demonstrates a 1-phase per unit analysis of a generator-load circuit, selecting base quantities, converting impedance and currents to per unit, and computing current, power, and voltage drops.

  • 04a Three Phase PU Analysis & Transformer Configurations (R1)51:53
  • 04b Three Phase PU Analysis & Transformer Configurations (R1)44:01
  • 04c Three Phase PU Analysis & Transformer Configurations (R1)51:03
  • 05a Change of Bases (R1)16:06
  • 05b System Circuit Analysis27:19
  • 06 Three Phase PU Example18:30

    Explore a three-phase per-unit analysis by establishing base values, converting circuit quantities to per unit, and computing the generator current for a delta-to-wye transformer with an inductive load.

  • 07 A PU Example9:27
  • 08 A PU Example22:10
  • 09 A PU Example24:21

    Perform a per-unit analysis of a three-phase system with three generators and three transformers, converting single-phase ratings to a three-phase bank and calculating impedances across Y and Delta connections.

Requirements

  • The student should have an understanding of the laws and theorems related to three phase electrical power systems.

Description

In the power systems analysis field of electrical engineering, a per-unit system is the expression of system quantities as fractions of a defined base unit quantity. Calculations are simplified because quantities expressed as per-unit do not change when they are referred from one side of a transformer to the other.

In this course you will learn exactly what Per Unit Analysis is, the main advantages of using it, how manufacturers of equipment use and rate their products and the technique of converting to and from the Per Unit system.

Several examples of working with Per Unit are demonstrated in this crisp clear presentation. When you finish you will have a though understanding of this subject.

It is important for all power engineers and technicians to be familiar with the concept of Per Unit as it is being used and referred to every day in power flow, short circuit evaluation and motor starting studies.

Who this course is for:

  • The targeted audience is Managers, Engineers, Technologists, Maintenance Personnel working in the electrical power protection industry.

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