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| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字?jǐn)?shù)：16311 |  | |
| 折扣與優(yōu)惠：團(tuán)購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要：在世界經(jīng)濟(jì)快速發(fā)展的背后是全球能源的快速消耗。能源是不可再生的，同時能源消耗帶來了嚴(yán)重的環(huán)境污染問題，這已經(jīng)引起全球范圍內(nèi)的廣泛關(guān)注。風(fēng)能作為一種高效無污染的新能源之一，已經(jīng)越來越受到世界各地的青睞。就目前國內(nèi)外情況看，由于電力電子技術(shù)的快速發(fā)展，給風(fēng)力發(fā)電并網(wǎng)技術(shù)帶來了革命，風(fēng)力發(fā)電的逐步優(yōu)化必將把風(fēng)能推向新能源應(yīng)用的巔峰。 隨著人們對電能的越發(fā)依賴，風(fēng)力發(fā)電機(jī)組的功率等級也在逐漸提升。目前國際上風(fēng)力發(fā)電機(jī)的功率等級已經(jīng)達(dá)到兆瓦級。風(fēng)電機(jī)組正在向大型化、變槳距和變速恒頻發(fā)展。由于風(fēng)力發(fā)電機(jī)發(fā)出的電不能直接滿足并網(wǎng)要求，需要經(jīng)過處理后才能并入電網(wǎng)。主要步驟包括整流、升壓斬波、逆變和消除諧波等。其中逆變電路是并網(wǎng)系統(tǒng)的核心部分，也正是電力電子技術(shù)發(fā)展的結(jié)果。 本文分析了逆變電路的各種分類，選擇采用主流的電壓型逆變電路。然后對比了兩種逆變控制技術(shù)方法：相位控制方式和脈沖寬度調(diào)制(PWM)控制方式。最后采用SIMULINK重點(diǎn)分析了它們的輸出電壓和電流波形及其諧波含量。 關(guān)鍵詞：新能源、風(fēng)力發(fā)電、逆變器、SPWM控制、仿真
Abstract: Behind the rapid development of the world economy is the rapid global energy consumption.Energy has caused widespread concern worldwide because of its non-renewable and polluting.Wind energy as an efficient non-polluting energy source has become increasing favored by the world around.As seen at home and abroad,due to the rapid development of power electronic technology which is bringing revolution to the wind power and network technology,and gradually optimize the will of wind power generation to the peak of the new energy applications. With more and more dependent on electricity,wind turbine power level is gradually upgrading.The power level of international wind turbine has reached the megawatt-class.The wind turbine is developing to larger in shape,variable pitch and variable speed constant frequence.Before sended to the power grid,the electricity generated by wind turbine have to be modified because of its dis-meeting the requirement.Thess processing steps including rectifier,boost chopper,inverter and the elimination of harmonics,and the inverter circuit is the core part of the grid system,but also the result of the development of power electronics technology. This paper analyzes the various classifications of the inverter circuit,choose the mainstream of the voltage inverter circuit.Then compared the two inverter control technology and methods:the phase control method and pulse width modulation (PWM) control method.Finally,use the simulink to analyze the output voltage and current waveforms and their hormonic content.
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