Empowered by our integrated industry and trade manufacturing system, we have successfully completed customized production, full testing and on-time shipment of SFFZ-63000kVA 115/11/11kV three-phase oil-immersed all-copper power transformer. This customized dual-low-voltage outlet transformer is specially deployed for a large-scale photovoltaic power station reconstruction and grid-connection project in Slovakia, delivering high-efficiency, grid-compliant and weather-resistant power transmission equipment for local new energy power generation and helping Europe accelerate its renewable energy deployment.

I. Project Background & Core Customer Pain Points

With the vigorous advancement of Europe’s renewable energy strategy, Slovakia is continuously expanding the installed scale of photovoltaic power stations and upgrading supporting grid-connected power equipment. This local large-scale photovoltaic project requires high-capacity step-up transformers to stabilize power generation output, integrate distributed photovoltaic power and realize safe grid connection.

European power grids adopt stringent EN and IEC 60076 standards, with extremely high requirements for transformer energy efficiency, operational stability and environmental adaptability. The client faced multiple bottlenecks in project construction:

1. Special dual 11kV low-voltage output design is required to adapt to dual-circuit photovoltaic power generation integration, realizing balanced power output and improving overall power generation efficiency.
2. Slovakia features variable alpine climates with large temperature differences between day and night, humid air and frequent thunderstorms. Conventional transformers are prone to damp insulation, increased loss and unstable operation.
3. The photovoltaic project has a tight construction window, requiring the whole process from technical confirmation, customized production to finished product delivery to be completed within 3 months, while most European local manufacturers have a delivery cycle of more than 4 months.
4. Long-term grid-connected operation of photovoltaic power stations demands low-loss, high-reliability equipment. The customer explicitly specified 100% all-copper windingsto reduce long-term power generation loss and extend equipment service life.

Targeting the dual-voltage parallel access demand of photovoltaic systems and European climate characteristics, our technical team optimized the electromagnetic scheme and structural design, creating a dedicated grid-connected transformer solution for Slovakian photovoltaic projects.

II.Customized Technical Advantages for European Photovoltaic Grid Connection

The SFFZ-63000kVA 115/11/11kV all-copper transformer exported to Slovakia is specially optimized for new energy photovoltaic power generation scenarios, solving the pain points of unstable power generation and difficult dual-circuit integration of local photovoltaic power stations, with comprehensive technical advantages:

1. Unique Dual 11kV Low-voltage Parallel Output Design

Different from conventional single-output transformers, this equipment adopts a customized 115kV high voltage input and dual 11kV low voltage output structure. It can simultaneously access two groups of photovoltaic power generation circuits, realize balanced shunt power supply, effectively avoid single-circuit overload operation, greatly improve the integration efficiency of distributed photovoltaic power, and perfectly match the operational logic of large-scale photovoltaic power stations.

2. 100% All-copper Winding & Low-loss Energy-saving Structure

The whole machine adopts high-purity all-copper windings with excellent electrical conductivity, strong over-current capacity and outstanding short-circuit resistance. Matched with high-grade low-loss oriented silicon steel core and optimized electromagnetic calculation technology, the no-load loss and load loss are far lower than European industry standards. It effectively reduces power consumption during long-term grid-connected operation of photovoltaic power stations and improves comprehensive power generation income.

3. European Alpine Climate Adaptive Upgrade

Aiming at Slovakia’s humid, rainy and large temperature difference climate, the transformer is equipped with fully sealed anti-damp structure, high-performance anti-corrosion coating and rain-proof and dust-proof shell. The customized insulating oil and sealing accessories adapt to -20℃~+45℃ wide temperature operation, preventing insulation dampness, oil aging and operational failure caused by humid weather, ensuring stable full-load operation of photovoltaic equipment throughout the year.

4. Intelligent Monitoring & Grid-friendly Operation

Equipped with full-set temperature sensing, oil level monitoring and partial discharge detection systems, and reserved European standard intelligent grid connection interfaces. It can be linked with the photovoltaic power station’s centralized control system to realize real-time data monitoring, abnormal early warning and automatic voltage regulation, effectively cope with photovoltaic power generation fluctuation and ensure grid-connected power quality meets EU standards.

5. Full Compliance with European IEC & EN Standards

Designed and manufactured in strict accordance with IEC 60076 and European EN power equipment standards, with ultra-low partial discharge design, high insulation safety level and strong grid impact resistance, fully meeting the strict access requirements of Slovakia’s new energy grid.

 

III. Industry & Trade Integration Strength: 3-month Rapid Delivery & Full Standard Compliance

European new energy projects have strict requirements on product quality, certification specifications and delivery efficiency. Relying on our full industrial chain advantages of independent R&D, self-owned production base and integrated foreign trade services, we have completed high-standard customized delivery for this Slovakian photovoltaic project within 3 months, breaking the long delivery cycle of European local manufacturers.

Strict Full-process Quality Inspection & Standard Compliance

Before delivery, the transformer passed all professional tests including voltage ratio verification, DC resistance test, insulation withstand test, loss parameter test and partial discharge detection. We provide complete English version technical documents, test reports and compliance certificates, fully meeting European customs clearance and grid-connected acceptance standards.

Independent Full-chain Production Shortens Cycle

We adopt one-stop independent production from core core processing, copper winding winding, vacuum drying to overall assembly, without outsourcing links. We synchronize technical scheme confirmation, production arrangement and quality inspection, greatly optimize the production process and ensure the completion of customized production and delivery within 3 months.

Export-grade Reinforced Packaging for Long-distance Transportation

Aiming at transoceanic shipping and European land transportation, the equipment adopts fully enclosed waterproof, moisture-proof and shock-proof export packaging, with fixed reinforcement and vibration protection measures to avoid equipment deformation, dampness and damage during transportation, ensuring intact delivery to the Slovakian project site.

IV.Project Value & European New Energy Market Layout

After official grid-connected operation, the SFFZ-63000kVA dual-low-voltage all-copper transformer will effectively solve the problems of scattered access and unstable output of the Slovakian photovoltaic power station, significantly improve the utilization rate of photovoltaic power generation and the safety and stability of regional new energy grid connection. Its low-loss energy-saving design can effectively reduce the annual operation and maintenance cost of the power station, creating stable economic and environmental benefits for local green energy projects.

The successful delivery of this Slovakia photovoltaic project fully highlights our professional strength in customized supporting equipment for European new energy projects. Different from traditional trading enterprises, we can provide targeted transformer customization solutions according to different regional climate characteristics and new energy grid-connected standards in Europe, covering scheme design, precision production, standard detection, export certification and after-sales technical support full-cycle services.

In the future, we will continue to focus on the European new energy market, continue to launch high-efficiency, low-loss and climate-adaptive professional transformers for photovoltaic, wind power and energy storage projects, and contribute high-quality Chinese manufacturing power to the global green energy transformation.