【正文】 頻雙饋發(fā)電機系統(tǒng)有如下優(yōu)點 : 允許原動機在一定范圍內(nèi)變速運行，簡化了調(diào)整裝置，減少了調(diào)速時的機械應力。同時使機組控制更加靈活、方便，提高了機組運行效率。 需要變頻控制的功率僅是電機額定容量的一部分，使變頻裝置體積減小，成本降低，投資減少。 調(diào)節(jié)勵磁電流幅值，可調(diào)節(jié)發(fā)出的無功功率；調(diào)節(jié)勵磁電流相位，可調(diào)節(jié)發(fā)出的有功功率。應用矢量控制可實現(xiàn)有、無功功率的獨立調(diào)節(jié)。 三 、風能技術的發(fā)展需要不斷的創(chuàng)新： 目前，我國風能發(fā)展中技術創(chuàng)新還很薄弱，缺乏有自主知識產(chǎn)權的核心技術。因此，在很大程度上還要從國外引進技術。雖然，在知識經(jīng)濟到來的時代，所有國家都充分利用全球資源，通過技術引進和國際合作來縮小差距，提高競爭能力。但是，如果沒有自主創(chuàng)新能力，就不知道引進什么先進技術，引進以后也沒有能力消化吸收，更不能進行再創(chuàng)新，這是一方面；另一方面，國外的核心技術是引進不來的，必須靠自主創(chuàng)新來掌握核心技術；再者，國內(nèi)的自主創(chuàng)新技術需要政策給予配套、引導、扶持，擁有核心技術的風能產(chǎn)品要加大扶 持力度，這樣 “墻內(nèi)開花墻外香 ”的局面才能得以改變，創(chuàng)新的動力才能來自不斷的創(chuàng)新。 總之：風電產(chǎn)業(yè)中的風能技術已從單一發(fā)電向各個需要用電的領域不斷的創(chuàng)新，其附加產(chǎn)品也應運而生如 :路燈、景觀、交通監(jiān)控、通訊、灌溉、種植、養(yǎng)殖、海水淡化、防火、警報、海島高山等。可見風能這個新興產(chǎn)業(yè)的發(fā)展能帶動了無數(shù)個傳統(tǒng)產(chǎn)業(yè)的發(fā)展與轉(zhuǎn)型，而風能在各個領域的應用技術成了這些產(chǎn)業(yè)發(fā)展的風向標。即將引發(fā)的世界革命必將來自于以風能技術等新能源產(chǎn)業(yè)的革命。 4 Wind Power Generation Technology Wind is very important and reserves of energy, it is safe, clean, and can provide abundant energy, stability of the stream. Now, use wind power has bee the main form of wind, the world39。s attention, and the fastest. Wind energy technology is a hightech。 it relates more than a dozen of subjects, including meteorology, aerodynamics, structural mechanics, puter technology, electronic control technology, material science, chemistry, electrical engineering, electrical engineering, so the difficulty of a system technology may beyond the difficulty of space technology. First, The division of wind energy technologies: Wind energy technology is divided into largescale wind power technology and small and medium sized wind power technology, although both are wind energy technology, working principles are the same, the two industries are pletely different: specific performance of the policy orientation is different in different markets, different applications, applied technology is different, totally belong to the same kinds of industries in the two sectors. Therefore, in China machinery industry meeting on the wind to large wind power and wind power to distinguish between small and medium treated separately. In addition, to meet different market needs, extending from the wind and solar technology has not only promoted the development of small wind power technology, but also for the small wind power opens up new markets. 1. Largescale wind power technology: The technology of largescale wind power in China still has a certain gap between international. The technology of largescale wind power technology originated in Denmark and some other European countries, the wind power industry propelled by the government, because of the local wind resourcerich, largescale wind power technology and equipment ahead of the international development. Our government has also started to boost the development of largescale wind power technology, and a range of policies to guide industry development. Largescale wind power technology are for the largescale wind turbine design, wind turbine applications for large area on the very strict environmental requirements are applied to limited resources, wind energy resourcerich wind field, to accept a variety of perennial bad environment that something was the plex nature of the environment, high demands on the technology up on the line. Currently largescale wind power technology in general is not yet ripe, the core technology of largescale wind power still rely on foreign, national policy guidance to the domestic wind power