I. Core Technical Features

1. Oval Coil Design: Balancing Space Efficiency and Structural Strength
   The transformer adopts an oval coil structure. Through precise mold forming technology, the filling rate of the coil within the iron core window is increased by 15%, significantly reducing the overall equipment volume and making it suitable for the compact installation space of photovoltaic (PV) power stations. Meanwhile, the radial force of the oval cross-section is more uniform, improving the mechanical strength of the coil by 40%. This enables the coil to withstand vibration and impact during transportation and operation, extending the service life of the transformer.
2. Segmented Design of High-Voltage Coils: Optimizing Electric Field Distribution
   This design controls the deviation of electric field intensity distribution inside the winding to within 5%, avoiding the risk of insulation breakdown caused by local electric field concentration. In addition, the segmented structure can reduce the impact of harmonic currents on the coils and lower additional losses. Even when the output power of PV modules fluctuates, the transformer can still maintain stable power conversion efficiency, thereby increasing the overall power generation revenue of the PV power station.

II. Special Structural Design

1. Pressure Relief Protection Device: Responding to Sudden Load Changes
   Affected by light intensity, the load of PV power stations is prone to sudden short-term surges, which may cause the insulating oil inside the transformer to expand due to heat and the pressure to rise sharply. Our factory has added an intelligent pressure relief protection device on the top of the oil tank, which is equipped with a pressure sensor and a controllable pressure relief valve to monitor the pressure changes inside the oil tank in real time. When the pressure exceeds the set threshold, the valve automatically opens to release pressure, preventing oil tank deformation or seal failure; when the pressure returns to normal, the valve closes automatically without manual intervention. This ensures the transformer operates continuously and stably in scenarios of sudden load changes, reducing unplanned downtime.
2. Mesh Guardrail Structure: Balancing Protection and Heat Dissipation
   PV transformers are mostly installed in outdoor open environments, requiring both equipment protection and heat dissipation. Our factory uses galvanized steel mesh guardrails, which can block external debris (such as birds and branches) from entering the equipment while not hindering air circulation—controlling the impact on the transformer’s heat dissipation efficiency to within 3%. At the same time, the mesh structure is lightweight and corrosion-resistant, enabling it to adapt to harsh outdoor environments such as high temperature and high humidity. Compared with closed guardrails, it eliminates the need for additional cooling fans, reducing equipment operation and maintenance costs as well as energy consumption.