PROT 407: Transmission Line Protection

Engineers and power system consultants who need a comprehensive understanding of the challenges and solutions for protecting high-voltage power transmission lines should attend this course.

PROT 407 provides an in-depth study of the methods used in designing protection systems for high-voltage power transmission lines. The course provides advanced guidelines for relay application and settings for transmission lines, including series-compensated lines. It also reviews time-domain ultra-high-speed line protection principles. The course covers the application and settings of power swing blocking and out-of-step tripping functions.

Agenda

• Power System Faults
• Transmission Line Overview
• Relaying Fundamentals
• Instrument Transformers
• Line Directional Overcurrent Protection

• Class Exercise: Line Directional Overcurrent Protection
• Line Distance Protection, Part 1
• Line Distance Protection, Part 2
• Class Exercise: Distance Protection
• Line Directional Comparison Protection

• Line Current-Based Protection
• Time-Domain Line Protection
• Series-Compensated Line Protection
• Power Swing Blocking and Out-of-Step Tripping

Note: This course teaches fundamental knowledge but does not provide hands-on experience with SEL relays.

Course Objectives

At the conclusion of this course, students can:

• Identify the challenges and solutions to transmission line protection problems
• Select the appropriate transmission line protection schemes for various applications
• Describe current and voltage transformers and their impact on transmission line protection scheme performance
• Identify, apply, and calculate settings for transmission line protection schemes, including directional overcurrent, distance, and pilot protection schemes
• Describe the various pilot protection schemes for transmission lines
• Discuss the advantages of line current differential protection
• Describe time-domain ultra-high-speed transmission line protection
• Identify the challenges and solutions to series-compensated transmission line protection
• Identify and apply power swing blocking and out-of-step tripping 

Prerequisites

A degree in electrical engineering or equivalent experience is required. In addition, PROT 407 requires completion of PROT 401: Protecting Power Systems for Engineers or the following:

• Familiarity with transmission line characteristics.
• A basic knowledge of protective relay design, symmetrical components, fault analysis, and power system protection.
• A working knowledge of trigonometry, basic calculus, complex numbers, and phasor concepts.

Course Preparation

Please check the General Course Information page, for what you should bring to class.