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Fundamentals of Modern Electrical Substations - Part 2

COURSE NO: E03-013
Fundamentals of Modern Electrical Substations - Part 2
Course Highlights

This online engineering PDH course series presents an overview of modern electrical substations, emphasizing their importance for reliable and effective operation of power systems; describing all major, auxiliary and control equipment; listing typical engineering issues associated with substation design and engineering; and providing recommendations for addressing these issues. The entire course series consists of three parts:

  • Part 1: Mission of Electrical Substations and their Main Components
  • Part 2: Electrical Substation Auxiliary and Control Systems
  • Part 3: Electrical Substation Engineering Aspects


Part 2 of this course series is presented herein. This course starts with an overview of relay protection philosophy and the main components of relay systems, followed by a description of the most popular types of protection schemes including their principles of operation, advantages and disadvantages. Different types of communication channels for relay protection systems are considered as well, including their arrangement and comparison of pros and cons.


The next section of this course covers metering systems including types of meters, their connections to power system instrument transformers, and explanations of real electrical quantities calculations based on metering equipment readings. The last section of the course describes substation auxiliary AC and DC power systems as well as alarm and remote control systems, concentrating on their functions and arrangement.


All explanations are supported by numerous drawings and photos illustrating control equipment operating principles and arrangement. Several problems with solutions are provided as well to improve the retention of the material.


This 3 PDH online course is intended for electrical and civil engineers and designers, construction professionals as well as utility company management and field personnel looking to expand their knowledge and experience in modern electrical substations.

Learning Objectives

This PE continuing education course is intended to provide you with the following specific knowledge and skills:

  • Understanding the role that substation auxiliary and control systems play in allowing all station equipment to function properly; consequently fulfilling the main substation mission to support reliable and effective operation of power systems
  • Understanding the  mission and operation principles of the following systems:
    • Relay Protection
    • Metering Systems
    • Auxiliary AC/DC Power Systems
    • Station Alarm and Remote Control Systems
  • Familiarizing with the arrangement of all substation auxiliary and control systems, their advantages and disadvantages.

In addition, after completing this part of the course, you'll be able:

  • Describe the mission of relay protection systems and criteria they need to meet
  • List the types of relay protection schemes
  • Explain what breaker failure protection and reclosing are intended for
  • Identify the main components of a power line carrier communication system
  • Understand the principle of signal transmission using fiber optic cable
  • Know the difference between analogue and digital types of metering equipment
  • Calculate the real value of electrical system parameters using readings of meters and instruments
  • Know the mission and main components of auxiliary A.C. and D.C. systems
  • List the types of conditions triggering station alarm
Course Document

In this professional engineering CEU course, you need to review Part 2 of Fundamentals of Modern Electrical Substations titled “Electrical Substation Auxiliary and Control Systems”.

To view, print and study the course document, please click on the following link(s):
Fundamentals of Modern Electrical Substations - Part 2 (2.2 MB)
Course Quiz
Once you complete your review of this section of this course, you need to take a multiple choice quiz consisting of twenty (20) questions to earn 3 PDH credits. The quiz will be based on the content of the course document.
The minimum passing score is 70%. There is no time limit on the quiz, and you can take it multiple times until you pass at no additional cost.
Certificate of Completion

Upon successful completion of the quiz, print your Certificate of Completion instantly. (Note: if you are paying by check or money order, you will be able to print it after we receive your payment.) For your convenience, we will also email it to you. Please note that you can log in to your account at any time to access and print your Certificate of Completion.

To buy the course and take the quiz, please click on: