Development of EDLC-Based Power Supply Unit for Pitch Drive Systems for Wind Turbines

摘要

A control unit with an emergency power supply and which moves the blade pitch angle without outside power supply to the stop position was developed to stop wind-power generators safely when a system power supply was cut off by lightning. MEICAP has the advantages of electric double layer capacitor: long-term storage and less impact on performance by frequent charge and discharge cycles. Drawing on such outstanding features, it was applied to emergency power supply units for pitch drive systems. For wind turbine systems and generators, the Company developed MEICAP 600S3 which features greatly improved safety and reliability. MEICAP is provided to domestic and foreign blade makers and is planned for global business expansion to be adopted in many systems in the future.