Honduras Solar Power Substation Transformer: Winley Electric 6500kva Custom Solution

Client Background

This project’s client is a leading local energy provider in Honduras with strong experience in photovoltaic project development and construction. In line with Honduras’ renewable energy strategy, it is participating in the country’s 2025 1.5 GW renewable energy tender, with a focus on large-scale solar plants and supporting substations in southern Honduras. 

Customer Core Requirements

• Grid Adaptability Requirement: The transformer must comply with Honduras’ 60Hz grid standard and 13.8kV interconnection requirements, with sufficient voltage regulation capability to handle local grid fluctuations. It should step up voltage from 480Y/277V to 13.8kV, while ensuring stable power quality and compliant harmonic levels for smooth grid integration.
• Energy Efficiency & Cost Control Requirement: As a key asset of the photovoltaic plant, the transformer must feature a low-loss design to reduce annual energy losses and long-term operating costs. Material selection and structural design should balance efficiency and investment cost, while supporting the project’s green power goals.
• Implementation & Service Requirement: The transformer must be delivered and commissioned on schedule to match the project timeline and support planned grid connection.

Winley Electric's solution

Winley Electric customized 6500kva solar power substation transformers (480Y/277V-13800V, ONAN cooling) to boost the power generated by the plant to 13.8kV, ensuring stable grid connection and contributing to the improvement of local power supply reliability and the popularization of clean energy.

Combining the characteristics of photovoltaic power generation and local grid requirements, Winley adopted a dual-winding design. The low-voltage side of 480Y/277V is directly adapted to the output of PV modules, eliminating the need for additional voltage conversion equipment and improving power transmission efficiency. An off-circuit tap changer with a ±5% tap range is equipped to flexibly adjust the voltage, effectively coping with local grid voltage fluctuations and ensuring that the power quality meets the grid connection standards.

The silicon steel core and aluminum winding are selected to optimize the loss design, with no-load loss controlled at 6800W and on-load loss at 45000W (85℃), achieving excellent energy-saving effects.

Rapid Response to Urgent Client Demand

• To meet the client’s urgent delivery and project schedule requirements, Winley Electric optimized production processes, integrated core resources, and strictly managed every step from design, procurement, component production, testing to packaging and delivery. It completed the full production and delivery of the 6500kVA solar power substation transformer in just 7 weeks .
• This 7‑week lead time strongly demonstrates Winley’s efficient production capacity and is well ahead of the market average for custom solar substation transformers of the same specification. Amid tight global transformer production capacity and extended delivery cycles, industry data shows the average lead time for custom 6500kVA oil‑immersed solar substation transformers is 12–16 weeks.
• Compared with the market average, Winley shortened the cycle by 5–9 weeks, improving efficiency by over 40%. This rapid delivery was not achieved at the expense of quality. Supported by its mature standardized production system, advanced equipment and professional technical team, Winley ran processes such as design and material procurement in parallel, optimized core component manufacturing and enhanced testing efficiency while complying with IEC 60076 standards.

Safety & Reliability Guarantee

The transformer adopts high-standard insulation design and reliable protection measures, complying with international standards and local grid requirements, to avoid safety hazards and ensure stable operation of the power system

Project Achievements

• Qualified Performance: After commissioning, the transformer has a voltage stability rate of 99.9%, and the harmonic content meets the relevant standards, fully meeting the grid connection requirements of the photovoltaic power plant, and ensuring stable power transmission.
• Ultra-High Efficiency Delivery: Winley completed the entire production and delivery of the transformer in only 7 weeks, which is significantly shorter than the market average delivery cycle of 12-16 weeks for the same type of customized transformer. This efficient delivery not only perfectly matched the client’s urgent project progress, avoided project delays caused by equipment supply, and ensured the photovoltaic power plant was connected to the grid as planned, but also fully demonstrated Winley Electric’s leading production efficiency and strong supply capacity in the global transformer manufacturing industry, especially in the context of the current industry’s tight production capacity and prolonged delivery cyclessuperscript:1superscript:5.
• Regional Energy Empowerment: The project provides about 10MW of clean power for local areas, alleviating the power shortage in southern Honduras, promoting the popularization of renewable energy, and helping Honduras achieve its energy transition goals.