Grid-connected hybrid-driven variable-pitch variable-speed constant-frequency wind turbine generator set

Abstract

The invention provides a grid-connected hybrid-driven variable-pitch variable-speed constant-frequency wind turbine generator set which is developed against two popular types of direct-driven type anddouble-feed type in China presently. The grid-connected hybrid-driven variable-pitch variable-speed constant-frequency wind turbine generator set consists of an impeller system, a transmission system, a support system, a yaw system, a hydraulic system, a temperature control system and an electrical system, wherein the impeller system is directly connected with a flange of a planet carrier of a speed increasing box of the transmission system, and comprises three blades, a wheel hub and a variable-pitch control unit, a casing of a stator of a generator of the transmission system and a casing ofan inner gear ring of the speed increasing box are respectively fixed on a rotary support of a support system by the way of a front flange and a back flange, and the generator is a synchronous permanent magnet generator. The grid-connected hybrid-driven variable-pitch variable-speed constant-frequency wind turbine generator set adopts a primary planetary gearbox and the low-speed permanent magnetsynchronous generator, thereby having the advantages of small volume, simple structure, fewer maintenance items of the set, low maintenance cost, no need of special hoisting equipment, sufficient space for meeting the requirements of maintenance and ergonomics, and optimal maintainability of all the parts.

Description

(1) Technical field [0001] The invention relates to wind power generation technology, in particular to a grid-connected hybrid drive variable-pitch variable-speed constant-frequency wind power generating set. (2) Background technology [0002] Wind energy is one of the earliest energy sources used by humans. As far back as 2000 BC, sailing ships and wind mills appeared in Egypt, Persia and other countries. In the Middle Ages, the Netherlands and the United States had horizontal-axis windmills for irrigation and drainage. my country is one of the first countries in the world to utilize wind energy. As early as 1800 years ago, there was a record of wind power lifting water in my country. In 1890, P. Lacourt of Denmark successfully developed a wind turbine. In 1908, Denmark had built hundreds of small wind power stations. From the beginning of the 20th century to the end of the 1960s, the development of wind energy resources in some countries was still in the stage of small-sc...

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Problems solved by technology

[0003] At present, there are mainly two types of grid-connected wind turbines in my country: one is the direct drive type; the other is the double-fed type. The direct drive type has better maintainability, but the direct drive type motor Large number and high quality, there are some inconvenience factors such as the overweight of the whole machine cabin, poor loading conditions, and difficulties in installation and transportation

The double-fed type also has the disadvantages of high gearbox failure rate and high maintenance cost

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