Introduction to Photovoltaic/Wind Power Step - up Transformers

Basic Concepts

The step - up transformer is a crucial device in photovoltaic power generation and wind power generation. Photovoltaic power generation directly converts solar energy into electricity using solar cells, while wind power generation converts wind energy into electricity. However, the electricity generated by both usually has a relatively low voltage and a large current, which is inconvenient for direct use. The step - up transformer can convert low - voltage electricity into high - voltage electricity, facilitating the transmission and utilization of electricity.

Working Principle

The step - up transformer mainly works based on the principle of electromagnetic induction. Take the 380V - to - 750V/660V step - up system transformer as an example. It consists of an iron core and windings. The primary winding is connected to a 380V power source. When an alternating current passes through the primary winding, it generates an alternating magnetic flux in the iron core. According to Faraday's law of electromagnetic induction, this alternating magnetic flux will induce an electromotive force in the secondary winding. By rationally designing the turns ratio of the primary and secondary windings, the step - up function can be achieved. As shown in the formula U1​/U2​=N1​/N2​ (U1​ is the primary voltage, U2​ is the secondary voltage). When N2​ is greater than N1​, step - up can be achieved.

Functions and Advantages

Voltage Increase

It can convert low - voltage electricity into high - voltage electricity, facilitating the transmission and utilization of electricity. For example, in a photovoltaic power generation system, the low - voltage electricity generated can meet the requirements of the medium - and high - voltage distribution system after passing through the step - up transformer.

Loss Reduction

High - voltage transmission can reduce line losses and improve power generation efficiency. According to Joule's law Q=I2Rt (Q is the heat, that is, the line loss, I is the current, R is the line resistance, and t is the time). Under the same transmission power, as the voltage increases, the current decreases accordingly, and the line loss is significantly reduced.

Expanding the Application Scope

High - voltage electricity can be applied in a wider range of fields, such as industry and households. It can also enable the electricity generated by power plants to be transmitted to load centers farther away, expanding the application scope of power generation.

Improving Power Generation Efficiency

Through the step - up transformer, the power generation system can more efficiently convert solar or wind energy into electricity, reducing waste. For example, in photovoltaic power generation, it can solve the problem of voltage fluctuations caused by changes in sunlight intensity, enabling the power grid to stably receive and use electricity.

Cost Reduction

High - voltage transmission reduces line losses and thus reduces the cost of power generation. At the same time, equipment like the 10KV/2500KVA photovoltaic step - up box - type transformer is compact in structure, small in size, and light in weight, reducing the space occupation of land and, to a certain extent, reducing costs.

Environmental Protection and Energy Conservation

Photovoltaic and wind power are clean energy sources in themselves. The application of step - up transformers promotes the sustainable development of new energy. It can efficiently transmit excess electricity, avoid energy waste, improve the energy absorption capacity, and contribute to the sustainable development of energy.

Common Types and Characteristics

10KV/2500KVA Photovoltaic Step - up Box - type Transformer

Its main characteristics are compact structure, high operating efficiency, and strong reliability. It is small in size and light in weight, which can greatly reduce the space occupation of land. Adopting advanced design concepts and manufacturing processes, its operating efficiency is as high as over 90%, much higher than that of traditional transformers. It also has good anti - interference performance and high - temperature resistance, and can operate stably in various harsh environments.

380V - to - 750V/660V Step - up System Transformer

It uses advanced insulating materials and winding - winding processes to ensure stability and reliability during high - voltage conversion. It can extend the power transmission distance, reduce losses, increase the voltage level of the distributed photovoltaic power generation system's output voltage and then connect it to the power grid, reducing the impact on the low - voltage distribution network, ensuring the safe and stable operation of the power grid, and promoting the large - scale application of photovoltaic power generation.

380V - to - 660V Transformer

Based on the advanced principle of electromagnetic induction, through the precise design of the turns ratio of the primary and secondary windings, it realizes accurate voltage conversion, providing a reliable guarantee for the efficient and stable operation of rooftop photovoltaic power plants, etc.