Air Insulated Substation Design Part 3

Air insulated substations are the most common type of substation that you will find on the electrical network, due to their cost effectiveness and simplicity.

In part 3 of this course we will look at some additional features of this type of substation.

Most substations use DC to supply the protection and control systems, so that when the main AC supply fails we can continue to monitor and control the electrical network, In this course we will look at all of the DC systems that you will come across inside a typical transmission level substation.

In part 2 of this course we looked at basic interlocking, in this course we introduce some more advanced principles of this important system feature

Protection panels are used to house all of the protection and control equipment’s that we use, and it is interesting to study how they are constructed, and look at some of the equipment’s that they contain, some of which only appears in protection systems.

Current transformers are used in the substation to measure the magnitude of the current, in this course we will show all of their key features and how they operate during normal and fault situations, this will allow you to understand all of the parameters that you will find on a CT rating plate.

In the same way as we looked at current transformers we will learn how voltage transformers operate and how they should be connected to the secondary protection system.

By the end of the course you will have a better appreciation of all of these key substation systems.

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