本文關(guān)鍵詞： 諧波抑制 有源電力濾波器 LCL濾波器 并聯(lián)阻尼　出處：《大連理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：近年非線性電力電子設(shè)備的廣泛應(yīng)用,給電網(wǎng)帶來嚴(yán)重的諧波污染,降低了電能質(zhì)量,因此諧波治理受到越來越多的重視。為克服傳統(tǒng)無源濾波器體積大、易諧振等缺點(diǎn),補(bǔ)償特性好、體積小的有源電力濾波器應(yīng)運(yùn)而生。然而,有源電力濾波器的三相橋式變換電路會引入開關(guān)諧波,增加系統(tǒng)諧波含量,這就需要在變換電路輸出端增加并網(wǎng)濾波器,以減少注入電網(wǎng)的諧波。目前,針對有源電力濾波器的研究主要集中于控制策略方面,對并網(wǎng)濾波器的研究較少,并網(wǎng)濾波器的優(yōu)化設(shè)計(jì)將有利于有源電力濾波器補(bǔ)償性能的提升。本文首先分析了有源電力濾波器的選擇方法、工作原理,概述了常用的指令電流檢測方法和電流跟蹤控制策略；其次分析了常見的單電感濾波器和LCL濾波器的特點(diǎn)及設(shè)計(jì)方法,從系統(tǒng)穩(wěn)定性、電流衰減特性、阻尼損耗和電源內(nèi)電抗及諧波對補(bǔ)償結(jié)果影響方面,對比串聯(lián)阻尼LCL濾波器和并聯(lián)阻尼LCL濾波器的濾波特性；在此基礎(chǔ)上,通過系統(tǒng)閉環(huán)傳遞函數(shù)得到三種有源阻尼LCL濾波器實(shí)現(xiàn)方法。針對無源阻尼LCL濾波器的缺點(diǎn),提出一種新型LCL濾波器拓?fù)浣Y(jié)構(gòu),在電容支路中增加濾波電感,加快濾波器在高頻段的衰減速率,將阻尼電感并聯(lián)在電源側(cè)電感兩端,減小阻尼損耗。利用MATLAB分析電源側(cè)電感與逆變器側(cè)電感比值、阻尼電阻值對電流衰減特性和阻尼損耗特性的影響并進(jìn)行仿真,結(jié)果表明：新型LCL濾波器在提高衰減特性的基礎(chǔ)上能減小阻尼損耗,采用新型LCL濾波器系統(tǒng)總諧波失真可以從28%降低至1.2%。在此基礎(chǔ)上,進(jìn)行并聯(lián)電壓型有源電力濾波裝置的軟硬件設(shè)計(jì)和實(shí)驗(yàn)驗(yàn)證。實(shí)驗(yàn)的控制系統(tǒng)由雙DSP28335實(shí)現(xiàn),由CPLD (EPM570)控制AD7606作A/D轉(zhuǎn)換,雙口RAM實(shí)現(xiàn)數(shù)據(jù)存儲及主DSP和從DSP的通信。在實(shí)驗(yàn)平臺上完成了不同電壓等級下單電感濾波器、LCL濾波器及新型LCL濾波器的對比補(bǔ)償實(shí)驗(yàn),結(jié)果表明：新型LCL濾波器能實(shí)現(xiàn)較好的補(bǔ)償,且其阻尼損耗比傳統(tǒng)LCL濾波器低。
[Abstract]:In recent years, the wide application of nonlinear power electronic equipment has brought serious harmonic pollution to the power network and reduced the power quality. Therefore, more and more attention has been paid to harmonic treatment. In order to overcome the disadvantages of the traditional passive filter, such as large size and easy resonance, etc. The small size active power filter emerges as the times require. However, the three-phase bridge conversion circuit of the active power filter will introduce switching harmonics and increase the harmonic content of the system. It is necessary to add grid-connected filters at the output of the converter circuit to reduce the harmonics injected into the power grid. At present, the research on active power filter is mainly focused on the control strategy, but the research on grid-connected filter is less. The optimal design of grid-connected filter will help to improve the compensation performance of APF. Firstly, this paper analyzes the selection method and working principle of APF. The common current detection methods and current tracking control strategies are summarized. Secondly, the characteristics and design methods of single inductor filter and LCL filter are analyzed, including system stability and current attenuation characteristics. The effects of damping loss, reactance and harmonics on the compensation results are compared. The filtering characteristics of series damped LCL filter and parallel damped LCL filter are compared. Three kinds of active damping LCL filters are obtained by the closed-loop transfer function of the system. Aiming at the disadvantages of passive damped LCL filters, a new topology of LCL filters is proposed, which increases the filter inductance in the capacitor branch. The attenuation rate of filter in high frequency band is accelerated, and the damping inductance is connected at the two ends of the power side inductor to reduce the damping loss. The ratio of the power side inductance to the inverter side inductance is analyzed by MATLAB. The effect of damping resistance on the current attenuation and damping loss is simulated. The results show that the new LCL filter can reduce the damping loss on the basis of improving the attenuation characteristics. The total harmonic distortion of the new LCL filter system can be reduced from 28% to 1.2. On this basis, the hardware and software design and experimental verification of the shunt voltage active power filter device are carried out. The control system of the experiment is realized by double DSP28335. CPLD / EPM570) controls AD7606 to make A / D conversion, and dual port RAM realizes data storage and communication between master DSP and slave DSP. On the experimental platform, the comparison and compensation experiments of different voltage order order inductor filters and new LCL filters are carried out. The results show that the new LCL filter can achieve better compensation and its damping loss is lower than that of the traditional LCL filter.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN713.8;TM761

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李宏;張仰維;董瑾;黨恩山;;淺談諧波治理技術(shù)的發(fā)展[J];電源技術(shù)應(yīng)用;2011年02期

相關(guān)碩士學(xué)位論文 前1條

1 郭濤;基于DSP控制的三相三線制并聯(lián)有源電力濾波器研究[D];南京航空航天大學(xué);2006年

，

本文編號：1538061