【Technical Introduction】
 By utilizing the 25 kW wind turbine developed in-house by NARI (as shown in Figure 1), the project team made improvements and optimizations to the power generation system and control system, so as to develop a new 30 kW wind turbine (as shown in Figures 2 and 3). Additionally, NARI helped to establish a domestic component industry chain to actualize the local capabilities in design and manufacturing technologies for small and medium-sized wind turbines. The experimental unit underwent field testing at the Da’an Wind Farm in Taichung City (as shown in Figure 4) to diversify the applications of small and medium-sized wind turbines and expand the domestic and international wind turbine market.
This technology replaced the asynchronous variable speed gear generator with a direct drive generator to improve the power transmission chain's dynamic losses and enhance the efficiency of the turbine. The blade variable pitch mechanism is adjusted to eliminate the need for a spindle oil circuit slip ring, thus to increase reliability of the variable pitch system. NARI also employed site-specific wind energy assessment and unit installation planning tools to proactively assess investment benefits and ensure that the unit’s control response aligns with site requirements. Finally, the integration of controller simulations and dynamic analysis of the wind turbine is applied to ensure compliance with standard requirements, so as to ensure the safety of the wind turbine operation and maintenance.


Figure 1. Cross-sectional view of the 25 kW wind turbine mechanism


Figure 2. Cross-sectional view of the new 30 kW wind turbine mechanism


Figure 3. Schematic diagram of the new 30 kW wind turbine


Figure 4. The new 30 kW wind turbine field test

【Project Planning/Technical Applications】
This R&D achievement is based on the existing wind turbine development technology. It incorporates online control system software and hardware to enhance overall system performance and meet the stringent field requirements. By utilizing fully active control technology, it increases the operational hours of wind turbines while also complies with the IEC 61400-2 international standard for wind turbines at the Class I level. This technology elevates the level of safety even in harsh weather conditions and contributes to the widespread adoption of decentralized power systems, ultimately enhancing the industry’s reliability.
 
【Future Development】
This technology comes from the collaboration between partners including NARI, wind turbine development companies, wind farm operation and maintenance companies, and wind power lifting and transportation companies. The ultimate goal is to establish a complete domestic supply chain for small and medium-sized wind turbine design, manufacturing, and operation. NARI aims to create a fully localized technical team for developing domestic commercial small wind turbines. In the future, NARI will strive to promote the development of decentralized power industries to achieve the goal of industry localization and further extend the coverage of this application to the international energy market.

【Contact Information】
Name：Yu-Chu Lin
Tel：03-4711400 ext 3344
E-mail：linyuchu@nari.org.tw