Large-sized variable speed permanent magnetism wind power generation system

• Main Authors: LU BINGQUAN, MIAO LIJIE, LIU TONGYAN, WU XIAOBIN
• Format: Patent
• Language: Chinese; English
• Published: 03.09.2008
• Subjects: BLASTING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION; HEATING; LIGHTING; MACHINES OR ENGINES FOR LIQUIDS; MECHANICAL ENGINEERING; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; PRODUCING MECHANICAL POWER; SYSTEMS FOR STORING ELECTRIC ENERGY; WEAPONS; WIND MOTORS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS

The invention relates to a constitution and control strategy of net work-forming type large-scale variable speed permanent magnet wind power system which belongs to wind power field. The invention provides a system structure using two permanent magnet dynamotors and a relatively small inverter, adding corresponding control strategy wind power technique for obtaining better wind power utilization ratio with low cost, increasing wind motor group year utilization hour. Capacity and pole number of two permanent magnet dynamotors are different, output frequency is 50HZ under respective rated speed, and can grid connect directly. The system provided by the invention has an inverter matching with the relative small permanent magnet dynamotor, associates with corresponding switch and special control strategy for realizing flexible combination between two dynamotors and inverter under various capacity and wind speed to gain best wind power utilization ratio.