Why Substation Transformers Are So Important In Power System?

Substation Transformer For Sale

When seeking a substation transformer for sale, consider the following factors before making a purchase:

• Determine Your Substation Transformer Requirements: Identify the specifications you need, including voltage, capacity, and standard features (bushing design, accessories requirements).
• Understand Local Standards and Regulations: Ensure the substation transformer compliance with relevant industry standards and regulations in your region.
• Research Reliable Substation Transformer Manufacturers: Look for reputable substation transformer manufacturers with a track record of producing high-quality and reliable transformers. Local project application cases are valuable references.
• Check The Substation Transformer Certifications: Verify necessary certifications of substation transformers, such as UL listing, CSA, ISO 9001, or other relevant industry certifications.
• Consider The Substation Transformer  Energy Efficiency: Evaluate the substation transformer's energy efficiency, considering factors like no-load and load losses.
• Explore New and Used Substation Transformers: Decide based on your budget and requirements. For used substation transformers, choose a reputable local supplier and pay attention to warranty and maintenance terms.
• Evaluate The Substation Transformer Maintenance Requirements: Understand maintenance needs and consider the long-term operational costs of the substation transformers.
• Request Substation Transformer Quotes: Obtain quotes from multiple substation transformer manufacturers to compare prices and terms.
• Review Warranty and Support Of The Substation Transformer: Check provided warranties and inquire about available customer support and service options.
• Consider Customization: As substation transformers are usually customized, assess the manufacturer's design and production experience and their ability to provide customization services.
• Logistics and Delivery: Consider logistics and delivery deadlines to ensure the substation transformer's timely transportation and installation.
• Installation and Commissioning: Ensure the manufacturer provides the necessary installation and debugging documents for the transformer. If you lack an installation team, seek local professionals.

Try for free: Step-by-Step Guideline On Installing A Transformer

Always consult with professionals or engineers experienced in substation equipment to ensure the chosen transformer meets safety standards and local regulations for your project.

What Is The Purpose Of A Substation Transformer?

The Substation Transformer can not only increase the voltage to send electric energy to the electricity-consuming area, but also reduce the voltage to the voltage used at all levels to meet the needs of electricity consumption. In short, both step-up and step-down must be completed by the transformer.

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 In the process of transmitting electrical energy in the power system, two losses of voltage and power will inevitably occur. When the same power is transmitted, the voltage loss is inversely proportional to the voltage, and the power loss is inversely proportional to the square of the voltage. The use of transformers to increase the voltage reduces transmission losses.

What Role Does A Substation Transformer Play In The System?

Substation transformers are one of the main equipment in power plants and substations. The function of the transformer is multi-faceted. It can not only increase the voltage and send the electric energy to the electricity-consuming area but also reduce the voltage to the voltage used at all levels to meet the needs of electricity consumption.

Using a substation transformer to increase the voltage reduces transmission losses.

The main functions include:

1. Transmission and distribution of electrical energy. If it is a step-up transformer, it can send electricity out. If it is a step-down transformer, the electric energy can be transmitted or distributed separately;

2. The rated voltage of the primary and secondary sides can be changed;

3. The phase angle of the primary and secondary sides can be changed.

Get it now: How To Choose The Suitable 110KV Power Transformer?

What Is The Basic Principle And Working Principle Of A Substation Transformer?

Basic Principle:

The basic structural components of a substation transformer are the iron core and windings, which form the body of the transformer.

 To improve the heat dissipation conditions, the body of the large and medium-capacity transformers is immersed in a closed oil tank filled with transformer oil, and the connection between each winding and the external circuit is led out through an insulating sleeve.

To make the transformer operate safely and reliably, accessories such as an oil conservator, gas relay, and safety air passage are also provided.

Working Principle:

A single-phase transformer has two coils wound together on a closed iron core, as shown in the figure on the right, in which the coil connected to the power supply is called the primary coil, and the symbols related to the primary coil are marked in the lower right corner. With angle code 1, such as U1, I1, etc., the coil with the load necklace is called the secondary coil, and the symbols of each quantity related to the scale are marked with angle code 2 in the lower right corner, such as U2, I2, etc.A single-phase transformer has two coils wound together on a closed iron core, as shown in the figure on the right, in which the coil connected to the power supply is called the primary coil, and the symbols related to the primary coil are marked in the lower right corner. With angle code 1, such as U1, I1, etc., the coil with the load necklace is called the secondary coil, and the symbols of each quantity related to the scale are marked with angle code 2 in the lower right corner, such as U2, I2, etc.

 Read more: What are the main parts of a 1500kva substation transformer that affect the price？

When an alternating voltage u1 is applied to the primary winding of the transformer, an alternating current i1 is generated in the primary winding, and this current generates an alternating magnetic flux Φ in the iron core because the primary and secondary windings are on the same iron core, so When the magnetic flux Φ passes through the secondary winding, the induced electromotive force e2 (ie the transformer voltage) is generated on the secondary side of the transformer.

The magnitude of the induced electromotive force in the transformer is proportional to the number of turns of the coil, the magnitude of the magnetic flux, and the frequency of the power supply.

What Is An Ideal Substation Transformer?

An ideal substation transformer is an idealized model of an actual transformer, an ideal scientific abstraction of mutual inductance components, and a coupled inductance in the extreme case.

Several idealized conditions for an ideal transformer:

Condition 1: There is no loss, it is considered that the wire around the coil has no resistance, and the magnetic permeability of the ferromagnetic material used as the core is infinite.

Condition 2: There is no leakage flux, that is, Φs1=Φs2=0, coupling coefficient K=1, it is full coupling, so Φ11=Φ21, Φ22=Φ12.

Condition 3: The parameters are infinite, that is, the self-inductance coefficient and the mutual inductance coefficient.

but satisfy:

In the above formula, N 1 and N 2 are the turns of the primary and secondary coils of the transformer, respectively, and n is the turns ratio. The above three conditions cannot be satisfied in engineering practice, but in some practical engineering estimates, within the allowable error range, the actual substation transformer is treated as an ideal transformer, which can simplify the calculation process.

Since K=1, L1→∞, L2→∞, there is M→∞.

In short, an ideal substation transformer is a transformer with no magnetic loss, no copper loss, and no iron loss.

Try for free: What influences a high voltage transformer price？

How To Choose The Right Capacity For Substation Transformer?

When the substation transformer runs without load, it needs to consume a large amount of reactive power, which needs to be supplied by the grid.

If the capacity of the substation transformer is too large, it will not only increase the initial investment of the equipment, but also make the substation transformer run at no-load and light-load for a long time, which will increase the proportion of the no-load loss, reduce the power factor of the grid, and increase the network loss. It is uneconomical and unreasonable.

On the contrary, if the transformer capacity is too small, it will overload the transformer for a long time and easily damage the equipment. Therefore, the rated capacity of the transformer must be selected reasonably.

Generally, the principle of selecting a reasonable transformer capacity should follow the following points:

(l) The rated capacity of the transformer should be able to meet the needs of all loads, that is, to meet the needs of the total calculated load of all electrical equipment, to avoid long-term overload operation of the transformer during operation.

(2) Transformer capacity should not be too large or too small: For substations or power distribution stations with two or more transformers, it should be considered that when one of the transformers fails, the capacity of the remaining transformers should be able to meet the needs of all loads of Class I and Class II.

(3) The selected transformer capacity should be as small as possible to achieve the purpose of flexible operation, convenient maintenance, and reducing the number of standby transformers.

(4) The normal load of the transformer should be greater than 60% of the rated capacity of the transformer.

Keep on reading: Basic Guide Of Electrical Transformer

Choose Daelim Substation Transformer!

The Daelim Transformer factory spans over 30,000 square meters and houses state-of-the-art high-voltage transformer workshops alongside distribution transformer workshops. With a monthly production capacity of up to 500 units, we can efficiently meet your requirements. Distribution transformers can be swiftly manufactured within 8-10 weeks. Moreover, we maintain a readily available inventory of commonly used transformers in North America, ensuring prompt fulfillment of your urgent needs, without enduring long waiting periods of 3 months, 6 months, or more.

No matter whether you are a contractor, engineer in utility, or user of bitcoin mining, you need the substation transformer for the power supply.

Daelim Transformer’s substation transformer is designed as a compact, small, and portable, and can serve as an emergency backup power source for natural disasters such as typhoons, earthquakes, and floods.

It complies with an electronic screen, the user can read the voltage, frequency, and ATS status easily, and also has an indicator that can show the remaining charge.

If you are looking for a cheap and functional transformer, Daelim Transformer’s substation transformer is a good choice for you!

Contact Daelim Transformer To Know More