Wind power generation involves transforming wind energy into mechanical energy, which is then converted into electrical energy. This process, integrating energy conservation, environmental protection, and clean energy, has gained prominence both internationally and domestically. The American Wind Energy Association (AWEA) reported that in 2008, the United States added 8.35GW of new wind power capacity, a 50% increase from its previous capacity, contributing to 20% of global wind power production, making it the world leader in this sector. Similarly, the United Kingdom, in its 2007 Energy White Paper, prioritized wind energy development alongside offshore oil and gas. By 2008, the UK had the largest offshore wind energy capacity and the most wind power stations globally. Denmark, an advocate of eco-villages, was the first to promote wind energy as a primary component of its new energy strategy, aiming for wind energy to constitute half of its energy mix by 2030, thereby becoming a wind-driven nation.
The combined transformer is crucial in wind power systems, boosting and transmitting the electricity generated by wind turbines. Key characteristics include:
Extended No-load Time: Wind power's seasonal nature results in transformers having an average annual load rate of only about 30%, necessitating minimal no-load losses.
Minimal Overload Time: Transformers, typically larger than wind turbines, benefit from advanced safety measures, ensuring longevity primarily based on the durability of their components rather than frequent overloading.
Harsh Operating Conditions: Installed in coastal, northeastern, and northwestern regions, transformers must withstand harsh weather, salt spray, mold, and humidity.
High-Voltage Surge Arresters: Surge arresters on the high-voltage side protect against overvoltage, with transformers designed to handle the residual voltage.
The structure of these transformers is standard but must be durable against sunlight, strong winds, weathering, and mechanical shocks. The equipment's interior must be accessible for maintenance, with high-voltage rooms ensuring sufficient insulation to prevent mishandling.
