PROT 411: Substation Equipment Protection

PROT 411 provides an in-depth study of the methods used in designing protection for high-voltage power transformer protection and substation bus protection.

Audience

Engineers who need a comprehensive understanding of the design concepts and methods used in protecting high-voltage electrical substation bus and power transformers would benefit from this course.

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Agenda

• Overview of Power System Faults
• Relaying Fundamentals
• Instrument Transformers (includes a class exercise)
• Overcurrent Protection Principles (includes a class exercise)
• Differential Protection Principle
• Bus Protection (includes a class exercise)
• Transformer Differential Protection
• Transformer Protection Exercise
• Transformer Nondifferential Protection
• Transformer Overcurrent Protection Exercise
• Substation Trip Circuits and Breaker Failure

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:

• Describe the protection requirements of power transformers and buses.
• Specify current transformers for protective relay applications.
• Define transformer protection issues and identify solutions using digital relays.
• Define bus protection problems and identify solutions for digital relays.
• Calculate relay settings for transformer and bus protection relays.

Student Background and Knowledge

Before you attend this class, we recommend that you have a degree in electrical engineering or equivalent experience. In addition, we recommend that you complete PROT 401: Protecting Power Systems for Engineers OR have the following:

• Familiarity with wye and delta transformer connections.
• A basic knowledge of protective relay design, symmetrical components, and power system protection.
• A working knowledge of trigonometry, basic calculus, complex numbers, and phasor concepts.

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