China'S FIRST 1.2 MW PERMANENT MAGNET DIRECT DRIVE WIND TURBINE WITH INDEPENDENT INTELLECTUAL PROPERTY RIGHTS WAS SUCCESSFULLY DEVELOPED IN January 2006 IN Harbin ELECTROMECHANICAL INDUSTRY CO., LTD. The generator will be installed at the Muling County wind farm in Heilongjiang Province.

This 1.2MW direct drive variable SPEED constant frequency PERMANENT magnet wind GENERATOR was successfully developed by Harbin Electric Machinery Factory Electromechanical Industry Co., LTD., WHICH took 8 years to DEVELOP. The design of the generator is based on the summary of the manufacturing experience of small and medium-sized hydro-generator and AC/DC motor, and the absorption of domestic and foreign wind power technology, which has its unique characteristics. It is characterized by no gearbox, compared with the gearbox structure used at home and abroad, the structure is simplified, the noise is reduced, the reliability is improved; The product can change the speed of wind wheel according to the wind speed, and keep the Internet frequency unchanged, improve the utilization rate of wind energy; It can also adjust the active power, reactive power and power factor of the generator, which is conducive to the stability of the power grid. The compensation capacitor is cancelled, not only does not absorb the grid reactive power, but also can send reactive power to the grid; Stable grid connection, grid current is not more than 20% of the rated current, and the use of DCS system control, PLC single control, easy to use and maintenance.

The generator has a voltage of 690V and a speed of 14~15 revolutions per minute. The diameter of the wind turbine is 57 meters, the number of blades is 3, and the length of the blades is 27.55 meters. The size of the single machine capacity in China's independent knowledge of wind power history is also the initiative. With the introduction and use of this type of wind turbine, the independent innovation and manufacturing of wind turbines in China in the future has complete independent intellectual property rights technology, to a certain extent will get rid of the large wind turbines rely on imports, rely on the introduction of technology, following foreign product technology development mode.

As a kind of clean renewable energy, wind energy will have a broad development prospect with the gradual maturity of technology, and its operating cost will be lower than that of hydropower and thermal power. The generator has been installed at the wind farm in Muling County, Heilongjiang Province.