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  本文選題：有源電力濾波器　切入點(diǎn)：混合級聯(lián)　出處：《合肥工業(yè)大學(xué)》2015年碩士論文

【摘要】：有源電力濾波器(Active Power Filter, APF)在濾除電流諧波、提高電能質(zhì)量方面相對于無源濾波器有著動態(tài)、實(shí)時、連續(xù)的顯著優(yōu)勢,同時不受電網(wǎng)元件的影響。低壓有源電力濾波器的研究相對成熟,高壓APF和低壓APF相比,其研究的側(cè)重點(diǎn)不在于諧波和無功檢測方法,更多的是拓?fù)浣Y(jié)構(gòu)和控制算法。高壓大容量APF的拓?fù)浣Y(jié)構(gòu)和控制算法有待改善。本文針對高壓有源電力濾波器在高壓電網(wǎng)諧波治理時,對于高壓大容量和高開關(guān)頻率兩者不可兼得的缺陷,對比其他高壓APF的拓?fù)浣Y(jié)構(gòu),采用一種混合級聯(lián)多電平拓?fù)浣Y(jié)構(gòu),可以提高輸出功率等級和開關(guān)頻率,提高補(bǔ)償效果。該有源電力濾波器由可以分別等效為電壓源與電流源的兩部分串聯(lián)組成：電流源部分為傳統(tǒng)的PWM變換器,由DSP負(fù)責(zé)完成諧波和無功電流的檢測與跟蹤；電壓源部分由3個H橋逆變器級聯(lián)構(gòu)成,由FPGA負(fù)責(zé)計算與發(fā)出27電平電壓的驅(qū)動信號,其輸出電壓的基波分量可以抵消電網(wǎng)電壓,因此電流源部分的PWM變換器交流側(cè)承受的電壓很低,從而可以提高PWM變換器的開關(guān)頻率,諧波抑制的效果更好。其控制策略簡單,易于實(shí)現(xiàn)。作為高壓大容量有源電力濾波器預(yù)研,在實(shí)驗(yàn)室條件下搭建了220V/10kVA的實(shí)驗(yàn)平臺,通過MATLAB仿真和實(shí)驗(yàn)結(jié)果證明了該拓?fù)涞挠行院蛯?shí)用性。
[Abstract]:Active Power filter (APF) has dynamic, real-time and continuous advantages over passive filter in filtering current harmonics and improving power quality.The research of low-voltage active power filter is relatively mature. Compared with low-voltage APF, the research of high-voltage APF is focused not on harmonic and reactive power detection methods, but more on topology and control algorithm.The topology and control algorithm of high voltage and large capacity APF need to be improved.In this paper, a hybrid cascade multilevel topology structure is adopted to overcome the defects of high voltage active power filter (HAPF) which can not be obtained both in high voltage large capacity and high switching frequency, compared with other high voltage APF topologies.It can improve the output power level and switching frequency, and improve the compensation effect.The active power filter is composed of two parts which can be equivalent to voltage source and current source in series. The current source part is a traditional PWM converter, and the DSP is responsible for detecting and tracking harmonic and reactive current.The voltage source is composed of three H-bridge inverter cascades. The FPGA is responsible for calculating and sending out the driving signal of 27 level voltage. The fundamental component of the output voltage can offset the grid voltage.Therefore, the voltage of AC side of PWM converter in current source part is very low, so the switching frequency of PWM converter can be increased, and the harmonic suppression effect is better.Its control strategy is simple and easy to realize.As a high voltage and large capacity active power filter, the experimental platform of 220V/10kVA is built in laboratory. The effectiveness and practicability of the topology are proved by MATLAB simulation and experimental results.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM761;TN713.8

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本文編號：1709391