Power System Protection: Transformer Protection from Udemy

This course is part of a multi-part course series about one of the main areas of power engineering: power system protection and control. Power system protection and control ensures the reliable continuous operation of power systems and is therefore an essential area of power engineering. In this course, you will learn about the different protective elements used for the protection of power transformers.

We will begin the course by giving a brief review of how power transformers are connected and how they operate, so that we can understand why and how to protect them from faults and abnormal operating conditions. We will then move on to discuss in great detail all the different protective elements that are used in industry to protect transformers. These include: phase differential (87P), ground differential (87G), instantaneous and inverse-time overcurrent (50/51), neutral inverse-time overcurrent (51N), and volts/hertz (24). We will end the course by explaining how an SEL-487E protective relay can be used for the protection of a power transformer.

By understanding how power transformers operate and how to implement different protective elements for their protection, you will be able to design robust protection schemes to protect these components from faults and abnormal operating conditions.

Remember that Udemy offers a 30-day money-back guarantee. I am also always available for questions while you go through the course to ensure everything is clear.

See you in the course.

What's inside

Learning objectives

Protection of power transformers
Use of phase differential (87p) and ground differential (87g) protection in power transformers

Use of instantaneous and inverse-time overcurrent (50/51), neutral inverse-time overcurrent (51n), and volts/hertz (24) protection in power transformers
How to use the sel-487e protective relay for protecting power transformers

Protection of power transformers
Use of phase differential (87p) and ground differential (87g) protection in power transformers
Use of instantaneous and inverse-time overcurrent (50/51), neutral inverse-time overcurrent (51n), and volts/hertz (24) protection in power transformers
How to use the sel-487e protective relay for protecting power transformers

Syllabus

Course Introduction

Welcome to the Course

About Your Instructor

Outline and Objectives

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Read about what's good

what should give you pause

and possible dealbreakers

Explores protective elements like phase differential (87P) and ground differential (87G), which are essential for designing robust protection schemes in power systems

Covers instantaneous and inverse-time overcurrent (50/51), neutral inverse-time overcurrent (51N), and volts/hertz (24) protection, which are industry-standard techniques

Details the use of the SEL-487E protective relay, which is a specific piece of hardware used in the protection of power transformers

Begins with a review of power transformer connections and operations, which builds a strong foundation for understanding protection strategies

Belongs to a multi-part course series about power system protection and control, suggesting a comprehensive and detailed approach to the subject

Reviews summary

Transformer protection fundamentals & relay application

According to students, this course provides a solid foundation in power transformer protection. Learners appreciate the clear and concise explanations of complex protective elements like phase and ground differential (87P/87G) and various overcurrent functions (50/51, 51N). A frequently highlighted positive is the practical segment focusing on the SEL-487E protective relay, which many found highly relevant for real-world applications. While the course is generally well-received, some reviewers note that it assumes a certain level of prior knowledge in power systems and basic protection concepts, suggesting it may be less suitable for absolute beginners. Overall, it's considered a valuable resource for professionals and those with foundational knowledge looking to specialize in transformer protection.

Good overview of protection elements.

"Covers all the essential protective elements for transformers effectively."

"Provides a thorough overview of typical transformer protection schemes."

"Learned about all the main relay functions used in the field."

Useful SEL-487E relay section.

"The section on the SEL-487E relay was incredibly practical and relevant."

"Applying the concepts to a real-world relay like the SEL-487E is a major benefit."

"This part helped bridge the gap between theory and practical application."

Complex concepts explained well.

"The instructor did a great job of explaining complex concepts clearly."

"Found the explanations of the different protection elements very easy to follow."

"The way the material was presented made difficult topics understandable."

Not for complete beginners.

"This course assumes you have some prior background in power systems."

"Might be challenging if you are completely new to power system protection."

"A basic understanding of electrical engineering and protection principles is helpful coming in."

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Power System Protection: Transformer Protection with these activities:

Review Power Transformer Fundamentals

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Reinforce your understanding of power transformer principles before diving into protection schemes. A solid grasp of transformer operation is crucial for understanding protection strategies.

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Review transformer construction and operation principles.
Study different transformer types and their applications.
Practice calculating transformer voltage and current ratios.

Review 'Protective Relaying: Principles and Applications' by J. Lewis Blackburn and Thomas J. Domin

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Supplement the course material with a detailed textbook on protective relaying. This book provides a broader and deeper understanding of the principles behind transformer protection.

View Melania on Amazon

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Read the chapters related to transformer protection.
Study the examples and case studies provided in the book.
Compare the book's approach to the course material.

Calculate Differential Relay Settings

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Practice calculating the settings for phase and ground differential relays. This hands-on exercise will solidify your understanding of how these relays operate and how to properly configure them.

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Obtain transformer nameplate data and fault current information.
Calculate the relay current and voltage settings.
Verify the settings using simulation software.

Four other activities

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Explore SEL-487E Relay Configuration Tutorials

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Follow online tutorials and guides to learn how to configure the SEL-487E protective relay for transformer protection. This will provide practical experience with a specific relay model.

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Find tutorials on the SEL-487E relay configuration.
Follow the tutorials to configure the relay for different protection functions.
Test the relay configuration using simulation software.

Design a Transformer Protection Scheme

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Design a complete protection scheme for a power transformer, including selecting appropriate relays and setting their parameters. This project will allow you to apply the knowledge gained in the course to a real-world scenario.

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Determine the transformer's operating characteristics and potential fault conditions.
Select appropriate protective relays based on the transformer's characteristics.
Calculate the relay settings and coordination.
Document the protection scheme design and settings.

Review 'Power System Relaying' by Stanley H. Horowitz and Arun G. Phadke

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Deepen your understanding of power system relaying with this advanced textbook. This book covers a wide range of topics related to power system protection, including transformer protection.

View Power System Relaying on Amazon

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Read the chapters related to transformer protection and advanced relaying techniques.
Study the examples and case studies provided in the book.
Compare the book's approach to the course material.

Contribute to Open Source Protection Simulation Tools

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Contribute to open-source projects that simulate power system protection schemes. This will provide hands-on experience with protection algorithms and software development.

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Find an open-source project related to power system protection simulation.
Identify a bug or feature to work on.
Contribute code or documentation to the project.

Career center

Learners who complete Power System Protection: Transformer Protection will develop knowledge and skills that may be useful to these careers:

Protection and Control Engineer

A Protection and Control Engineer designs, develops, and maintains the systems that protect power grids from faults and other disturbances. This role involves understanding the operation of power transformers and the application of various protective elements. This course provides a detailed look at protective elements such as phase differential, ground differential, overcurrent, and volts/hertz, all of which are critical for a Protection and Control Engineer. By learning how to implement these elements, you help build a foundation for designing robust protection schemes, as well as use the SEL-487E protective relay.

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Substation Engineer

A Substation Engineer is responsible for the design, construction, and maintenance of electrical substations, including the protection systems for power transformers. This course provides a detailed understanding of the various protective elements used in transformer protection, such as differential, overcurrent, and volts/hertz relays. For a Substation Engineer, the course’s discussion and use of the SEL-487E protective relay, allows expertise in designing and maintaining substation protection schemes.

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Relay Technician

A Relay Technician installs, tests, and maintains protective relays that are essential for the safety and reliability of power systems. This course on transformer protection can provide valuable insights into the operation of these relays, especially those used for protecting power transformers. The course's focus on protective elements like differential and overcurrent relays, and the study of the SEL-487E protective relay, allows a Relay Technician to better understand how these devices function and how to troubleshoot them effectively. This expertise is critical for ensuring the proper operation of power system protection schemes.

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Field Service Engineer

A Field Service Engineer installs, maintains, and troubleshoots electrical equipment at customer sites, including power transformers and protective relays. This course will be valuable because it offers a practical understanding of transformer protection schemes. The course covers essential protective elements, such as phase and ground differential, overcurrent, and volts/hertz protection. The course’s example of the SEL-487E protective relay helps the Field Service Engineer to diagnose and repair equipment.

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Power Plant Engineer

A Power Plant Engineer oversees the operation and maintenance of power plants, including the protection of power transformers. This course can be useful by providing a detailed understanding of transformer protection schemes. The course covers essential protective elements, such as phase and ground differential, overcurrent, and volts/hertz protection, enhancing a Power Plant Engineer's ability to maintain safer and more reliable power systems. The course’s discussion of the SEL-487E protective relay may be helpful.

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Arc Flash Engineer

An Arc Flash Engineer specializes in assessing and mitigating arc flash hazards in electrical systems, including those involving power transformers. This course will provide valuable insights into transformer protection schemes. The course covers essential protective elements, such as phase and ground differential, overcurrent, and volts/hertz protection, enhancing an Arc Flash Engineer's ability to design safer systems and protect personnel from potential hazards. The course’s example of the SEL-487E protective relay can help in practical applications.

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Electrical Engineer

An Electrical Engineer designs and oversees the installation of electrical systems, including those that involve power transformers. This course can be useful by providing a detailed understanding of transformer protection schemes. The course covers essential protective elements such as phase and ground differential, overcurrent, and volts/hertz protection, enhancing a Electrical Engineer's ability to design safer and more reliable power systems. The course’s discussion of the SEL-487E protective relay may be helpful in practical applications.

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Electrical Technician

An Electrical Technician assists engineers in the design, testing, and maintenance of electrical equipment and systems. This course on transformer protection provides a detailed understanding of transformer protection schemes. The course covers essential protective elements, such as phase and ground differential, overcurrent, and volts/hertz protection. The course’s example of the SEL-487E protective relay is useful to the Electrical Technician.

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Power System Analyst

A Power System Analyst uses computer software to model and analyze the behavior of power systems under various operating conditions, including faults. This course on transformer protection can be useful by providing a deeper understanding of how transformers are protected and how protective relays operate. The course's focus on protective elements such as differential and overcurrent relays, and the use of the SEL-487E protective relay, can enhance a Power System Analyst's ability to accurately model protection schemes and assess their effectiveness. Ultimately, this can lead to improved grid reliability.

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Grid Modernization Specialist

A Grid Modernization Specialist works to upgrade and improve the existing power grid, incorporating new technologies and strategies to enhance reliability and efficiency. This course on transformer protection can be particularly useful by providing a detailed understanding of modern protection techniques. The course covers essential protective elements, such as phase and ground differential, overcurrent, and volts/hertz protection. The course’s example of the SEL-487E protective relay may be helpful.

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Power System Operator

A Power System Operator monitors and controls the flow of electricity through the power grid. Understanding how power transformers are protected is crucial for maintaining grid stability. This course on transformer protection may be useful by familiarizing a Power System Operator with the different protective elements used to safeguard transformers, such as differential and overcurrent relays. Learning about the SEL-487E protective relay can help the operator better understand the protection schemes in place and respond effectively to abnormal operating conditions, thus reducing potential risks.

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Power System Planner

A Power System Planner forecasts future electricity demand and plans the expansion of the power grid to meet those needs. This course may be useful by providing insights into how power transformers are protected and the role of protective relays. The course's coverage of protective elements like differential and overcurrent relays, and the use of the SEL-487E protective relay, can help a Power System Planner make informed decisions about the design and placement of new equipment, ensuring the continued reliability of the grid. It is important for one in this role to understand the constraints and limitations of the electrical grid.

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Research Engineer

A Research Engineer investigates new technologies and methods for improving power system protection and control, often requiring an advanced degree. This course on transformer protection will provide a detailed understanding of existing protection techniques. The course covers essential protective elements, such as phase and ground differential, overcurrent, and volts/hertz protection. The course’s example of the SEL-487E protective relay may be helpful to the Research Engineer.

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Renewable Energy Engineer

A Renewable Energy Engineer designs and implements renewable energy projects, such as solar and wind farms, which often connect to the grid through power transformers. This course may be useful by providing insights into how transformers are protected and the role of protective relays. The course's coverage of protective elements like differential and overcurrent relays, and the discussion of the SEL-487E protective relay, can help the Renewable Energy Engineer make informed decisions about the design and integration of renewable energy systems, enhancing the potential for grid reliability.

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Energy Consultant

An Energy Consultant advises clients, such as utilities or large industrial customers, on how to improve their energy efficiency and reliability, which includes power system protection. This course may be useful by providing insights into how transformers are protected and the role of protective relays. The course's coverage of protective elements like differential and overcurrent relays, and the discussion of the SEL-487E protective relay, can help the Energy Consultant make informed recommendations about the design and operation of energy systems that are more reliable.

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Power System Protection

Transformer Protection

What's inside

Learning objectives

Syllabus

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Reviews summary

Transformer protection fundamentals & relay application

Activities

Career center

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