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Power Protection Schemes

Learn about the systems and designs applied to protect cables, transformers, and generators in this free online course.

Publisher: NPTEL
In this free online certificate course, you will learn the carrier-aided schemes used for the protection of transmission lines, auto-reclosing, and the synchronizing schemes employed for clearing faults. You will also study the systems used in protecting transformers and generators. The protection of these key components of a power system is essential. Therefore the knowledge acquired in this course will be a crucial addition to your profile.
Power Protection Schemes
  • Duration

    1.5-3 Hours
  • Students

  • Accreditation






View course modules


In this free online course, you will acquire the knowledge and skills required for the protection of the key components of a power system network, which basically consists of transmission lines, transformers, and generators. The protection of these elements from faults is critical to ensure the stability of the power system network. It also guarantees a stable power supply and prevents damage to the components, which can occur due to faults in the power system. First, you will study the carrier-aided schemes used in the protection of transmission lines. Then, you will learn auto-reclosing and synchronizing schemes used for restoring power connection after clearance of faults. The three types of transmission line protection will be introduced to you, including current-based schemes, distance relaying schemes, and pilot protection schemes. Moreover, the wire pilot relaying scheme, phase comparison scheme, as well as carrier blocking schemes, will also be discussed. Carrier-aided transfer tripping schemes, which consist of the underreach transfer tripping scheme and overreach transfer tripping schemes, will be expounded in detail.

Next, you will study the designs used in the protection of transformers from the various types of faults. Three types of faults, namely incipient faults, internal faults, and external faults, affect transformers. These faults will be explained in detail, together with the power protection schemes that are used to safeguard transformers against them. Furthermore, the six factors that must be considered for transformer protection will be discussed. Thereafter, you will be taught how to protect generators, which are the most expensive components of a power plant. You will learn the different types of protection and how they work. Differential protection, stator ground fault protection, rotor earth fault protection, field winding protection, and many more, will be elucidated in detail. Finally, you will study the concept of reverse power protection as well as the effect of power reversal on turbine prime movers.

The protection of the critical components of a power system network is crucial in ensuring the stability and reliability of a power system, thereby minimizing power outages. It also ensures that the components, consisting of power lines, transformers, and generators are safeguarded against potential damage that would cost power utility companies huge sums of money to repair or replace. Besides, power protection prevents potential harm to personnel and therefore, it saves lives. This course will be of benefit to professionals in power system networks seeking to refresh or expand their knowledge base, as well as anyone considering a career in the field of power systems protection. Check out the course now and grow your skills and knowledge in power systems protection. Start this course today.

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