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Types of Substations

May. 21, 2021

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The different types of substations mainly include Step-up Type Substation, Step-down Transformer, Distribution, Underground Distribution, Switchyard, Customer Substation, and System Station. Next, the substation supplier will introduce types of substations.

 

Step-up Type Substation

This type of substation receives its power from a nearby production facility. It uses large power transformers to increase the voltage level transmitted to the remote location. In the substation, power transmission can be accomplished by using a transmission bus to the transmission line. The substation may also be a knock on the door for the input power received by the power plant. The received power may be used to supply power to the operation of the equipment in the plant. The substation includes circuit breakers for generating switches and transmission circuits that turn on/off as needed.

Prefabricated Substation

Prefabricated Substation

System Stations

This substation includes a large amount of power transmission across stations and is therefore called a system station. These stations only do not provide power transformers, while other stations also provide voltage exchange. Typically, these stations supply the endpoints to the transmission lines generated from the switching stations and provide the electrical energy for the circuits supplied to the substation. They are important for long-term consistency. Not only are these stations strategic services, but they are also expensive to build and maintain.

 

Distribution Type Substation

Distribution substations are placed where the main distribution is stepped down in order to provide voltage to customers using the distribution network. The voltage between any two phases will be 400 volts and the voltage between neutral and any phase will be 230 volts.

 

Step-down Type Substation

This type of substation is located at different locations in the network. They can connect different parts of the network that are the source of subtransmission or distribution lines. This type of substation can change the transmission voltage to a subtransmission voltage (69 kV). The converted voltage line can provide power to the distribution substation. In some cases, the power is drawn from the transmission line and used all the way for industrial production. Otherwise, the power is supplied to the distribution substation.

 

Underground Distribution Substation

Installing substations in urban centers requires a lot of space, but usually, they do not have a place to install substations. To solve this problem, installing substations underground reduces space requirements and the surface area can be used for other buildings such as buildings, shopping centers, etc. The main concept of the underground substation is to provide the best conventional substation by reducing the space-occupying land above.

 

Switchyard

The switchyard is the mediator among the transmission as well as generation, and equal voltage can be maintained in the switchyard. The main purpose of this is to supply the generated energy from the power plant at a particular level of voltage to the nearby transmission line or power grid.

 Prefabricated Substation

Prefabricated Substation

11kv Substation

The main purpose of the 11kv substation is to gather the energy which is transmitted at high- voltage from the producing station, then lessens the voltage to a suitable value for local distribution & provides amenities for switching. This substation includes an isolator, lightning arrester, step-down transformer, CT metering, circuit breaker, and capacitor bank.

 

220 kV Substation

Here, the 220kVA substation is the power-capability utilized by the step-down transformer in the substation, and it illustrates the highest apparent power a step-down transformer can provide. The received voltage level of this substation will be 220kV.

 

132 kV Substation

The 132kV is the rating of the step-down transformer, which has a 132kV primary voltage. Generally, these transformers are employed in transmission-type substations where the voltage has to be stepped down to additional distribution.

 

. Similarly, some of the substations are classified based on the nature of duties, service rendered, operating voltage, by importance and design.

 

The nature of duties-based substations are step-up, primary grid substation, step-down.

The service rendered based substations are service rendered which includes a transformer, switching, and converting substations.

The operating voltage-based substations are high voltage, extra-high voltage, and ultra-high voltage substations.

The importance-based substations are grid and town substations.

The design-based substations are indoor, outdoor, foundation mounted and pole mounted substations.

Thus, this is all about different types of substations and you can refer to more information for Substation Layout & Line Diagram. From the above information, finally, we can conclude that a subsystem is an essential part of a power grid, and forms a significant connection among the transmission, generating, distribution as well as load points.


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