Supercapacitors are replacing lead-acid batteries as the main energy storage devices for backup power in wind turbine pitch control systems, which has reached a consensus in the global wind power industry. With the first batch of wind turbine pitch control systems using lead-acid batteries coming to an end, more and more project owners and wind power operators are choosing supercapacitor energy storage systems as backup power sources. The dual surge of new application trends and replacement trends has pushed the application of supercapacitors in the field of wind turbine pitch control systems to unprecedented heights.

This is due to the strong high-power discharge capability, good low-temperature performance, strong environmental applicability, long cycle period, and maintenance free characteristics of supercapacitors. Using the backup power supply of the fan pitch control system greatly improves the reliability, safety, and maintenance free nature of the pitch power supply. During the operation of the wind turbine, the power required for pitch control is very large, and the unique high-power discharge capability of supercapacitors fully meets this demand. The maximum cycle life of up to one million cycles reduces the maintenance cost of the wind turbine pitch system.

Regarding the key characteristics of using supercapacitors in wind power variable pitch systems, SPS application engineers from leading supercapacitor company Jixing Technology believe that they mainly include three aspects. Firstly, supercapacitors have good reliability over a wide temperature range and do not undergo chemical reactions during energy storage. The electrode material is activated carbon, which does not change at low temperatures, and the electrolyte with a lower freezing point ensures its good high and low temperature characteristics. Supercapacitors can operate within a wide temperature range of -40 ℃ to 85 ℃, especially stable and reliable in cold seasons, solving the problem of significantly reduced efficiency of lead-acid batteries in outdoor cold environments.

Secondly, adapt to different geographical environments. The supercapacitor module can meet the needs of wind turbines in different geographical environments, whether at sea or on high altitudes, it has excellent performance in high and low temperatures, high humidity, high altitude, and salt spray environments, and is suitable for wind fields under various climatic conditions.

Finally, the mechanical reliability of the module structure is good. The supercapacitor module is an energy storage device of different capacity levels composed of multiple supercapacitor monomers in series/parallel. It adopts reliable electrical connections and insulation protection measures. The optimized design and effective verification of the supercapacitor module structure have good reliability, and can maintain the stability and reliability of the product under continuous rotation and vibration conditions.

In short, supercapacitor modules not only have good energy storage characteristics, but also have status monitoring, maintenance free, and easy maintenance. They play an irreplaceable role in reducing the operation and maintenance costs of wind turbine pitch systems and improving reliability. They can be regarded as the best backup power source for wind turbine pitch systems.

Shenzhen Weikewei Technology Co., Ltd. adopts original imported supercapacitors, which have longer charging and discharging life, better stable performance, and higher cost-effectiveness!