Photovoltaic combination transformer is an electric device used in photovoltaic power generation system

Photovoltaic Combined Transformer (PCT) is a kind of power equipment specially designed for photovoltaic power generation system. The main function of this transformer is to process the electric energy generated by the photovoltaic array by stepping up or down, so that it can adapt to the voltage level and frequency requirements of the power grid, and ensure the efficient and safe transmission and distribution of electric energy.

The rated voltage of the primary side is 35 kV, which is suitable for the voltage level of medium and high voltage power grid, so that it can effectively access the regional power grid for power transmission. The rated voltage of the secondary side is 0.69 kV, which is usually used for the input voltage of the photovoltaic inverter to ensure that the DC power obtained from the photovoltaic array can be effectively converted into AC power and transmitted. The maximum working voltage reaches 40.5 kV, which ensures the stable operation of the equipment under the condition of over-rated voltage and improves the reliability and safety of the system. The rated frequency is 50 Hz, which is consistent with the power grid frequency of most countries and regions, ensuring seamless connection with the power grid. The rated capacity is more than 1600 kVA, which can meet the power transmission needs of large-scale photovoltaic power stations and support the efficient operation of high-power photovoltaic systems.

The ambient temperature range is wide, and it can operate stably under harsh environmental conditions from -45℃ to +40℃, and is suitable for various climatic conditions. The oil-immersed self-cooling cooling method is adopted, and the natural convection heat dissipation of the transformer oil ensures the temperature stability of the equipment during long-term operation and extends the service life of the transformer.

The PV combination transformer has the characteristics of high efficiency and energy saving, high reliability and simple maintenance. Its high rated voltage and large capacity design enable it to meet the needs of large-scale photovoltaic power stations. At the same time, the wide range of ambient temperature adaptability and oil-immersed self-cooling cooling method ensure the stable operation of the transformer under various extreme climatic conditions. These characteristics make the photovoltaic combination transformer an indispensable and important part of the photovoltaic power generation system, providing a strong guarantee for the efficient use of green energy.