Power System Protection Applications and Performance Analysis


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Course Overview

During this intensive course, you will learn the principles of power system protection leading to an understanding of overall system protection. The course instructors will supplement the lectures on protection practices with presentations of field oscillograms illustrating disturbances that trigger protective action and an analysis of the resulting responses.

Who Should Attend?

  • Electric utility engineers involved in applying, simulating, and testing protective relaying devices
  • Technicians, project managers, managers, and others involved in electric power systems and interfacing with relaying and substation communications and automation

Additional Information

Earn 2.2 CEUs, 22 PDHs with this course.

Course Outline

Introduction to the Course

  • Course organization
  • Role of relaying theory
  • Field experiences

Relaying Fundamentals

  • The nature of relaying
  • Relay terminology
  • Protection system design – redundancy, backup
  • Relay upgrades
  • Application of IEC 61850 station bus and process bus

Protection System Accessories

  • Current transformers
  • Wire wound and capacitive potential devices
  • Batteries
  • Circuit breakers
  • Teleprotection systems
  • Human machine interface

Fault level calculations and symmetrical components

  • Short circuit fault calculations
  • Symmetrical components and calculations 

Distribution Protection - Overcurrent Protection

  • Principles (why overcurrent protection works)
  • Neutral grounding
  • Fuses
  • Overcurrent relays
  • Circuit reclosers
  • Impact of power electronic converter sources

Distribution System Protection 

  • Feeders
  • Fuse saving
  • Small tapped substations
  • High side breakers, circuit switcher, fuses, or nothing
  • Substation and feeder protection coordination

Non-Pilot Line Protection of Transmission Lines

  • Relay setting philosophy
  • 3-terminal lines
  • Setting examples

Pilot Line Protection of Transmission Lines

  • Communication channels
  • Directional comparison
  • Transfer trip
  • Phase comparison
  • Wire pilot
  • Settings 

Operating Problems Affecting Human Safety

  • Miscoordination of relays
  • Misapplied operating procedures
  • Equipment failures and arcflash
  • Backup protection failures 

Interpreting Oscillograms

  • Reading oscillograms
  • Filtered or unfiltered oscillograms
  • Examples of various short circuits
  • Bus differential protection

Bus and Transformer Protection

  • Bus arrangements
  • Zone interlocking protection
  • Bus partial and full differential protection
  • Magnetizing inrush
  • Transformer protection
  • Application examples

Voltage Stability

  • Description of phenomena
  • Voltage collapse incidents
  • Reactive power control
  • Load shedding

Remedial Action Schemes


"Charlie Henville is a pleasure to listen to. His presentations are very detailed yet clearly delivered and easy to follow."

"An excellent overview of the various protection schemes."

"I've been to UW–Madison's EPD courses twice. I think you offer the best professional development experience I can find. This includes topics, instructors, facilities, technology, meals, etc. Thanks for a great effort. You have thought about a lot of extras and details. Well done."


John Bettler

John Bettler’s responsibilities at Commonwealth Edison include setting all distribution relays (line, bus & transformer), running fault or coordination studies and the field in troubleshooting. He was previously the Cogeneration relay engineer, and has also worked in marketing and on field engineering assignments. John is a registered PE in the state of Illinois and holds a MSEE from IIT and a BSEE from Iowa State.

Charles Henville

Charles Henville runs his own consulting company in power system protection and is an avid trainer of engineers. In addition to teaching at the University of Wisconsin, he has presented training courses to working engineers world-wide. His expansive career includes 30 years with BC Hydro in Canada where his responsibilities included the application and setting of protection systems for generation, transmission and distribution equipment with voltages ranging from 600 V to 500 kV. Charles is a native of the island of St. Kitts in the West Indies. His early education was in Jamaica, and he later graduated from the University of Cambridge in England. He received a Master of Engineering degree from the University of British Columbia. He is well recognized in the IEEE, being a Fellow grade member, a past chairman of the Power Systems Relaying Committee and a past distinguished lecturer of the Power and Energy Society.

Upcoming dates (0)

Take this course when it’s offered next!

Program Director

Shalini Bhat

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