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Protection and Control: High-Voltage Power Circuits

This free online course teaches how to keep high-voltage power circuits protected to operate optimally.

Publisher: Graham Van Brunt
Delivery of electrical energy to the end-user is a critical service and thus should be appropriately managed. Discover how to set up power stations, configure switches correctly, elements of system protection, relay schemes, breaker control and electrical faults. In addition, you will learn about electrical system structure, the different types of fuses, and how transformers are configured, connected and cooled.
Protection and Control: High-Voltage Power Circuits
  • Duration

    5-6 Hours
  • Students

  • Accreditation






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Energy is crucial to the existence of societies and is often a good indicator of their progress. Energy generated via electricity has become a favourite over time because of its versatility. However, electricity has a positive and negative sides. It was said to be a good servant but a bad master. Electricity has a destructive nature to lives and property when handled inappropriately, stressing the importance of prioritizing safety. This course will give you a good overview of managing electrical systems efficiently, thereby ensuring that value is delivered to the end-user safely. You will begin by exploring the elements of a substation, how they are segmented and configured for optimal operation. Supervisory control and data acquisition (SCADA) is essential to the modern-day operation of power substations, so you will learn how it works. You will be shown the open profile for air-insulated switchgear (AIS) and enclosed or gas-insulated switchgear (GIS) under high voltage switch configuration. Investigate the effect of cost, reliability, flexibility, and maintainability on different bus types’ optimum selection and setup. We will explore system protection and control elements, including breakers, switches, battery banks, and relays. 

The purpose of protective relaying is to ensure that faulty power equipment is removed from service quickly to minimize equipment damage, limit the effects of disturbance and maintain the stability of systems. This course will take you through an extensive study of relaying in general. You will examine the purpose of protective relaying, protection requirements for systems, failure of protection schemes, fault characteristics and types of electrical faults. You will also study basic electrical system structure, devices in a power system, instrument transformers, potential transformers and polarity. Three-phase power distribution has become standard, and knowing how it works will help you understand its advantages over single-phase power. You'll discover what causes the failure of high voltage transformers, as well as learn about transformer construction review, voltage classification and cooling. Surge protectors guard against voltage spikes in electrical equipment. In contrast, circuit breakers keep wires from catching fire due to an overload of amps (amount of electrical current). In this light, you will review surge protective equipment and types of breakers and their characteristics. We will study the schematics and general requirements of control circuits. This will include control closing, control tripping, trip-free, anti-pump and reliability in breaker control circuits. 

The next step up from protection by fuses and involving relays is the instantaneous and time overcurrent protection. You will learn what differentiates the two and where you can best apply them in the power grid. The final stage of the delivery of electricity to the end-user is distribution. Understand how distribution networks operate and the schematics of low voltage feeder protection. Upon that, you will learn about the causes of feeder faults and protection essentials for transmission lines such as graded overcurrent protection, differential protection and more. This course will examine the different aspects of impedance relaying, the mho type distance relay, impedance zone tripping and permissive overreach transfer trip (POTT). Finally, we will look at the working of some relays that are in use across different utilities. Do you often wonder how power systems work, how electrical energy is transmitted safely over long distances and why this same electricity can be so dangerous? Then you are at the right place. We will answer these questions to your satisfaction in this course. With the basic knowledge of physics and electrical circuitry, you will enjoy every minute you spend studying here. Empower yourself by enrolling in this course now.

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