What is the role of low-frequency transformers in renewable energy integration?

1. Improvement of voltage conversion and transmission efficiency

The electricity generated by renewable energy (such as wind power and solar energy) usually has a low voltage, while long-distance transmission requires high voltage to reduce losses. Low-frequency transformers convert electricity into high voltage (such as 220kV) through the boost function. For example, in wind farms and photovoltaic power stations, they can boost low-voltage AC power to a voltage level suitable for grid transmission. At the same time, at the end of transmission, they will step down the voltage to adapt to user needs. This conversion significantly reduces energy losses during transmission.

2. Supporting the integration of renewable energy systems

In solar inverters and wind power generation control systems, low-frequency transformers are responsible for power conversion and stability, ensuring the effective connection between new energy power generation equipment and the grid. For example, offshore wind power can achieve efficient transmission over medium and long distances through a flexible low-frequency transmission system (using low-frequency transformers), and its economic efficiency is better than traditional DC transmission.

3. Adapting to grid fluctuations and intelligent management

Renewable energy generation is volatile (such as changes in light and wind speed). Low-frequency transformers combined with intelligent monitoring technology can dynamically adjust the working state and improve grid stability. For example, China's power grid companies use low-frequency transmission technology to enhance regional power interconnection and promote renewable energy consumption.

4. Improve system reliability and economy

Low-frequency transformers have a simple structure and strong overload capacity. They can withstand short-term high-current shocks and are suitable for high-power application scenarios. Its high-reliability design (such as high-temperature resistant materials and heat dissipation optimization) also extends equipment life and reduces maintenance costs. In addition, flexible low-frequency systems are more economical within a specific capacity and distance range, saving costs for renewable energy projects