本文選題：風力發(fā)電　切入點：雙饋電機　出處：《哈爾濱理工大學》2015年碩士論文

【摘要】：全球經(jīng)濟發(fā)展帶來了巨大的能源需求，傳統(tǒng)的能源供應已經(jīng)很難滿足需求并且也會帶來霧霾等環(huán)境問題。尋找新型環(huán)保優(yōu)質(zhì)能源已經(jīng)成為當下的熱門課題。風能作為廣泛存在于自然界的能量，其可再生性、無污染性和巨大的含量等優(yōu)點已經(jīng)被人們接受并且引起了重視。我國幅員遼闊，地理位置優(yōu)越，具有豐富的風能資源，并且已經(jīng)建立了很多的風力發(fā)電廠。 在風電系統(tǒng)安裝的電機類型中，雙饋式感應電機(Doubly Fed InductionGenerator,簡稱DFIG)具有的功率可調(diào)和變速恒頻運行等優(yōu)點使其已經(jīng)成為目前主流機型之一。 本文通過對雙饋式異步發(fā)電機的數(shù)學模型進行分析，經(jīng)過坐標變換得到dq兩相旋轉(zhuǎn)坐標系下的簡化模型。對風力機實現(xiàn)最大風能追蹤的能力進行分析，并根據(jù)風力機的物理模型，經(jīng)過計算，推導出以最大風能追蹤為目標的風力機控制系統(tǒng)。對雙饋式異步風力發(fā)電機的交-直-交變換器進行理論分析，通過選取不同的控制策略實現(xiàn)系統(tǒng)的有功功率和無功功率解耦控制，以實現(xiàn)最大風能跟蹤運行。 通過Matlab/Simulink軟件對雙饋式風力發(fā)電系統(tǒng)中的風機、電機和控制部分分別進行建立仿真模型，并對其進行仿真分析。通過對仿真結(jié)果分析可知，本文采取的控制策略可以很好地實現(xiàn)有功、無功功率解耦，可以根據(jù)系統(tǒng)變化實時改變有功功率和無功功率參考值從而適應風速的變化實現(xiàn)最大風能追蹤。在電網(wǎng)電壓波動的情況下，本文采取的控制策略能快速響應，控制系統(tǒng)的無功功率變化，，減小因電壓波動對系統(tǒng)穩(wěn)定運行帶來的影響。
[Abstract]:Global economic development has brought huge energy needs, Traditional energy supply has been difficult to meet the demand and will bring environmental problems such as haze. Looking for new environmental protection and high quality energy has become a hot topic. Wind energy, as an energy widely existing in nature, is renewable. The advantages of pollution-free and huge content have been accepted and paid attention to. China has a vast territory, superior geographical location, rich wind energy resources, and has established a lot of wind power plants. Among the motor types installed in wind power system, doubly-fed induction motor (DFIGM) has become one of the mainstream models because of its power and variable speed constant frequency operation. In this paper, the mathematical model of doubly-fed asynchronous generator is analyzed, and the simplified model in dq two-phase rotating coordinate system is obtained by coordinate transformation. The ability of wind turbine to track maximum wind energy is analyzed. According to the physical model of wind turbine, a wind turbine control system aiming at maximum wind energy tracking is deduced through calculation. The AC-DC-AC converter of doubly-fed asynchronous wind turbine is analyzed theoretically. The decoupling control of active and reactive power is realized by selecting different control strategies to realize the maximum wind power tracking. The simulation model of fan, motor and control part in doubly-fed wind power generation system is established by Matlab/Simulink software, and the simulation analysis is carried out. The control strategy adopted in this paper can realize the decoupling of active and reactive power. The reference value of active power and reactive power can be changed in real time according to the change of system, and the maximum wind energy tracking can be realized according to the change of wind speed. In the case of voltage fluctuation of power network, the control strategy adopted in this paper can respond quickly. The reactive power of the system is controlled to reduce the influence of voltage fluctuation on the stable operation of the system.
【學位授予單位】：哈爾濱理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM614

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