35kV Oil-Immersed Transformer For Solar Energy Storage Station

Pearl Electric's 35kV Solar Energy Storage Station Oil-Immersed Transformer is designed for solar energy storage systems. The transformer provides efficient energy conversion and reliable operation for renewable energy projects, especially solar applications.

The transformer's capacity ranges from 800kVA to 31,500kVA to meet large-scale energy storage needs. Its primary voltage is 34.5KV, 35KV, or 38.5KV, making it an ideal choice for a variety of solar facilities. The transformer is durable and oil-immersed cooled, which enhances its ability to handle high-load operation.

The transformer has an on-load tap changer (±4x2.5%) to adjust the voltage as needed. It is designed for three-phase systems to ensure stable power transmission. The insulation grade is Class A, ensuring that the transformer operates reliably under harsh conditions.

Using mineral oil, FR3 oil, or silicone as the insulation material provides the best performance and protection for the transformer. The winding material can be copper or aluminum, depending on the application requirements.

The transformer is suitable for solar energy storage stations that require high voltage and high capacity for efficient energy storage and distribution. With ONAN cooling, the transformer maintains optimal performance and temperature regulation even during high-energy operation.

Product Parameters

Features of 35kV Oil-Immersed Transformer For Solar Energy Storage Station

Oil-Immersed Technology: The transformers are designed with oil-immersed cooling technology to ensure optimal performance and temperature regulation for efficient power transmission.

High Voltage Rating: The transformers are rated for 35kV high voltage applications to ensure safe energy distribution in medium and large industrial environments.

Fuse Protection: The transformers are equipped with a fuse-fuse system to protect against overloads and short circuits, providing enhanced safety and operational reliability.

Durability and Service Life: The oil-immersed design and premium materials ensure a long service life, reducing maintenance needs and downtime.

Customization Options: The transformers are available in a variety of capacities from 800kVA to 31,500kVA and can be customized to meet specific project requirements.

Advatages of 35kV Oil-Immersed Transformer For Solar Energy Storage Station

Enhanced Safety: The fuse-fuse provides an additional layer of protection, cutting off power in the event of overload or fault, ensuring minimal risk to the transformer and connected systems.

Efficient Power Distribution: Designed for efficiency, oil-immersed transformers ensure reliable power supply while reducing energy losses.

Superior Cooling: The oil-immersed technology effectively cools the system, preventing overheating and improving the overall efficiency of power transmission.

Cost-effective: By providing a long service life and reducing the frequency of repair or replacement, this transformer is a cost-effective solution for large energy projects.

Versatile applications: Its rugged design makes it suitable for a variety of industries, including mining, construction, and power plants.

Applications of 35kV Oil-Immersed Transformer For Solar Energy Storage Station

Grid: This transformer is ideal for use in regional and national power grids where reliable energy distribution is critical.

Industrial use: Transformers are commonly used in manufacturing plants, refineries, and heavy industrial applications to ensure a stable energy supply.

Renewable energy projects: This transformer is also suitable for renewable energy projects to ensure efficient energy conversion and transmission.

Commercial infrastructure: From large commercial buildings to data centers, this transformer provides stable and reliable power to critical infrastructure.

Transformer Production Technology

• TRANSFORMER WINDINGS

For the low and high voltage coils, either copper or aluminum can be used as conductor material according to the standards or customer requirements. Winding are separated as LV Windings and HV Windings.

Conductor types according to voltage level and load losses:

-On LV coil: Foil (sheet) or paper insulated rectangular sectioned

-On HV coil: Enamel insulated round or paper insulated rectangular sectioned conductors are used.

The windings are made of resin coated DDP and special Kraft paper resistant to high shock and electrical withstand. The structure of this specially formed layer insulation increases the impulse voltage properties. The layer insulation also helps in achieving another important goal: to produce a rigid coil without space.

• VENTILATION

Transformers are naturally cooled with ONAN ventilation. According to customer requirements, transformers with ONAF ventilation can be also manufactured.

• TRANSFORMER CORE

The core transformers are made of cold rolled grain oriented silicon steel (CRGO).

The steels are choosen according to no-load loss value M5, MOH, HI-BI quality class and 0,30-0,23 mm thickness range.

Cores are cut fast and without burr by modern transformer lamination cut machine. The cores are aligned according to the project data with step-lap method to reduce losses and noise.

• ACTIVE PARTS

Active part is formed by the placement of the coils to core legs and alignment of the upper core. Yoke clamps and wedges are placed to compress the coils. Cover, terminal and tap changer installations are done to make it ready for first pre-tests. The alignment of the insulations on the cover, accessories and other equipments are done according to the customer requirements

• TANK AND PAINT

Tanks are in 2 types: with radiator and corrugated walls. Tank base and top covers are made of mild steel. Corrugated walls of front and side surfaces o the tank also forms the cooling surfaces.

Front and side surfaces are made of steel sheet in tank with radiator,

Tanks are sealed with welding. Tanks are cleaned with special chemicals and dry before painting. Corrosion resistant and hardly adhesive undercoat paint is applied as two layers. After undercoating the tanks are subjected to drying process. After drying process, topcoat paint is applied on the undercoating according to the customer's dye thickness requests. The tanks wait in the drying Owens. RAL 7033 color code is used as to coating paint (or with different colors as per customer requests). Inner surface of the tank is coated with special varnish.

• DRYING AND FILLING

Low Frequency Technology for Drying and Filling Oil immersed type distribution transformer, the insulation materials have to be dried before oil filling. This drying process affects the quality of the transformer directly. Pearl Electric chose Vacuum Drying Technology for drying and filling under vacuum environment. Humidity is reduced to minimum in the oil and in the active part of the tank by this process.

TECHNICAL DATASHEET FOR POWER TRANSFORMER

FAQs of 35kV Oil-Immersed Transformer For Solar Energy Storage Station

1. What is an oil-immersed transformer?

An oil-immersed transformer is a transformer that uses mineral oil for insulation and cooling. The oil helps prevent overheating and ensures that the transformer operates efficiently.

2. What is the voltage range of a 35kV oil-immersed transformer?

35kV oil-immersed transformers are designed to handle primary voltages of 34.5KV, 35KV, or 38.5KV, making them suitable for high-voltage applications in solar energy storage systems.

3. What are the main features of a 35kV oil-immersed transformer?

Key features include its powerful cooling method (ONAN), a wide capacity range (800 to 31,500 KVA), and advanced insulation materials such as mineral oil, FR3 oil, or silicone oil.

4. How does a 35kV oil-immersed transformer work in a solar energy storage station?

The transformer effectively steps down the voltage of a solar power generation system to a level suitable for energy storage, ensuring safe and reliable power transmission in energy storage stations.

5. Can 35kV oil-immersed transformers be customized?

Yes, transformers can be customized to specific requirements, including winding material (copper or aluminum) and insulation options (mineral oil or FR3 oil).