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.

This third part of the air insulated course will look in more detail of the elements that go into this type of substation before looking in detail at how we lay them out in a safe and logical way.

Panels are used throughout the electrical system to house the protection and control equipments and all of the other systems that allow the substations to operate.

In the first part of this module we will look at the basics behind these critical equipments

By the end of this module you will understand how the panels are constructed and learn about some of the key equipments that you will find in control panels.

In the second module on panels we will look in detail at some of the systems that go into a typical control and protection panel.

By the end of this lecture you will understand how a basic ferruling system works and how we choose and connect the wiring that connects all of the equipments together inside the panel.

We will also look at how we lay the panels out inside a typical control room.

Most high voltage substations contained thousands of control cables, which do everything from passing measurements from the primary plant to the control building, and sending signals between all of the equipments.

In the first module on these critical items we see how we select the right type of cable for the right function and how we run control cables into the relay and control panels.

In the second module on control cabling we will at the more practical aspects of running thousands of control cables through a typical substation building.

By the end of the module you will understand how we can take the control cables through the floor and into the panels, and learn about the cable tray systems that we use to route the control cables through a typical substation basement.

In the third module on control cabling we will see how the control cabling is used to the connect all of the main equipments within the substation switchyard.

By the end of the module you will understand how we select the correct type of control cable for each type of the main types of primary plant and learn how we route the control cables through the switchyard and back to the main substation control building.

In the final module on control cabling we will look at some more aspects of this critical equipment.

By the end of this module you will understand the basic elements of a cable schedule, which records all of the key information on the thousands of cables that go together to make the control cable installation.

You will also see how we size the low voltage AC and DC supply cables and learn the best way to connect these cables together in the substation switchyard.

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 the first module on this subject we will look at all of the DC systems that you will come across inside a typical transmission level substation.

By the end of this module you will know the basic architecture of a DC system, how we select the right battery for the right application and understand how the batteries are sized

In the second module on DC systems we look at more aspects of these critical equipments.

By the end of the lecture you will understand all of the different options that we have for grounding the dc systems so that a fault can always be identified.

We will also learn how we layout a DC room so that the batteries can be installed and maintained safely without endangering personnel.

In the last part of this course we introduced the basic principles of interlocking.

In part 1 of this module we apply these principles on some more complicated substation configurations.

By the end of this module you will learn how we use logic terminology to describe the interlocking and then use it on some typical substations

In part 2 of this module we apply the principles that we learned on the first part of this module on advanced interlocking to some more complicated substation configurations.

By the end of this module you will learn some techniques of how to apply interlocking to various configurations which should allow you to apply interlocking to any configuration that you may come across.

In this module we will look at one of the key primary equipment's that we use which are current transformers.

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 this module we will leave the theory behind and start looking at the practical side of protection systems, by looking at how we use current transformers, connect them together and feed the protection and control circuits..

In this lecture we will look at the other main primary measuring device that we use, which are voltage transformers.

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.