Hanjin Ltd., a Korean manufacturer in the petrochemical industry and palletizing systems, has produced the HJWT1500, a MW-class wind turbine. The 1500/70 horizontal-axis turbine features a three-bladed upwind rotor with pitch power regulation and constant rotor speed, an asynchronous generator coupled directly to the grid, and an active yaw system. The 1500/77 upgrade has a…