市场化时代，如何挖掘风电传动链性能极致

Core Viewpoint - The transition to a fully market-oriented wind power system necessitates the development of wind turbines that are cost-effective and reliable, especially in the context of fluctuating electricity prices [1][2]. Summary by Sections Market Dynamics - The introduction of the new policy for renewable energy (Document 136) indicates that wind power will no longer have fixed electricity prices, making it essential to stabilize power generation during high price periods [2]. - The investment costs for wind power projects, particularly the manufacturing costs of wind turbines, need to be effectively controlled due to potential downward pressure on electricity prices [2]. Transmission Chain Technology - The transmission chain, consisting of the main shaft system, gearbox, and generator, is critical for converting wind energy into electrical energy and significantly impacts the reliability of wind turbines [2]. - The integration of the transmission chain can be categorized into three types: low-speed integration, high-speed integration, and full integration, each suitable for different turbine capacities [5]. Integration Approaches - Low-speed integration combines the low-speed components of the main shaft system and gearbox, enhancing reliability for turbines with rotor diameters over 200 meters [5]. - High-speed integration is applicable for turbines with capacities of 15MW and above, focusing on the integration of the gearbox's high-speed output with the generator [5]. - Full integration is seen as a future trend for offshore megawatt wind power technology, particularly for turbines exceeding 15MW [5][6]. Gearbox Optimization - Enhancing the torque density of gearboxes is crucial for improving the competitiveness of the entire wind turbine system [7]. - The torque density of gearboxes has improved significantly, with current values for three-stage planetary gearboxes reaching 250N·m/kg to 260N·m/kg, and future advancements may achieve 300N·m/kg [7][8]. System-Level Optimization - Achieving system-level optimization requires a comprehensive understanding of the interrelations between various components, including the gearbox, main shaft, and load control systems [10][11]. - Rigorous testing and validation processes are essential to ensure reliability, with companies like Envision Energy implementing standards that exceed industry norms [12]. Production Milestones - Envision Energy has successfully produced its 10,000th self-developed gearbox, marking a significant achievement in its manufacturing capabilities and establishing itself as a leading player in the global gearbox market [14].