Air insulated substation design part 2

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 second 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.

Every piece of primary plant on a substation has a unique number so that there is no confusion when circuits are being operated and maintenance done.

In the first part of this two part lecture we will look at how these numbering schemes are developed and applied to some typical substation configurations.

By the end of this module you will understand how the numbering system is developed and how it can be applied to any situation that you may come across.

In the second part of this two part lecture we will look at how we can apply the primary plant numbering schemes to some more advanced substation configurations.

By the end of this module you will understand how the numbering system is applied which will allow you to use it on any new or non-standard configuration that you may come across.

Ring main units are used throughout the distribution system due to their flexibility & simplicity.

By the end of this module you will understand how these popular devices operate and how we ensure that they can be operated safely.

Air insulated substations transmit a large amount of energy and the implications of an isolator or ground switch being operated when the electrical system is still live can be catastrophic for both personnel near the equipment’s and the electrical system.

To avoid this situation occurring we use interlocking.

By the end of this section you will understand the different types of interlocking equipment’s that we use and how these are applied in a typical air insulated substation.

The other main way that we control the safe operation and sequencing of the substation equipment is mechanical interlocking

By the end of this lecture you will know which understand the basic principles behind mechanical interlocking and understand how it can be applied in a practical way to different circuit configurations

Transformer's are complex devices and in this section we will look in detail at how they are constructed, and what monitoring and control devices we use to ensure that they are operating correctly.

By the end of this module you will know what the inside of a transformer looks like, what effect the operation of the cooling system has on the transformer rating and what devices you will typically find on a transformer.

Transformers are the most expensive device that we use on the electrical network and looking after them is one of main goals when we design protection systems.

This is the first of five modules associated with transformers in this course, and we start by looking at some of the basic design features of transformers.

By the end of this section you will understand all about transformer winding types and vector groups

Transformer tapchanger's are used to alter the voltage on the network, in this section we will look at the main types of tapchanger's that we use and see how they are controlled.

By the end of this section you will understand the differences between no load and on load tapchanger's and appreciate the different control circuits that we use to operate them.

Transformers are a key part of the electrical system and it is important that we install them in such a way that they can be installed, operated and maintained properly, and provided with physical barriers which protect adjacent transformers when one goes faulty.

By the end of this lecture you will all understand all of the key features of a transformer bay and know why they are designed in this manner.

Transformers are large and expensive and need to be transported safely from the factory to the transformer foundation, this can be a complex and lengthy process that needs to be planned in detail in every part of the process. We look at all of the issues that you will face and highlight how we can overcome them,

We also look at  how we design the substation is designed to facilitate the delivery of these critical equipment's so that they can be safely offloaded onto the transformer foundation

Getting a large transformer from the haulage vehicle onto the transformer slab can be a complex and dangerous procedure, and in this lecture we highlight a typical methodology of how this can be achieved and highlight some of the issues that you will face in doing this safely and in a controlled manner.