【摘要】：隨著電力電子技術(shù)的飛快發(fā)展,大量非線性負(fù)荷迅速增加,造成電網(wǎng)中低功率因數(shù)、諧波、電壓波形畸變、電壓波動和閃變以及三相不平衡等電能質(zhì)量問題日益嚴(yán)重。當(dāng)前,諧波抑制和無功功率補償已經(jīng)成為電力電子技術(shù)和電力系統(tǒng)等領(lǐng)域面臨的重大課題。有源電力濾波器(Active Power Filter, APF)是一種新型的電力電子設(shè)備,可以動態(tài)地抑制諧波和補償無功,且具有高度的可控性和快速響應(yīng)能力。本文以三相四橋臂有源濾波器為研究對象,進行了理論分析、仿真以及實驗驗證。 首先,本文介紹了電力系統(tǒng)諧波產(chǎn)生的原因、危害及目前較常用的治理方法。隨后總結(jié)了有源濾波器國內(nèi)外研究現(xiàn)狀、拓?fù)浣Y(jié)構(gòu)、諧波檢測算法和電流控制算法等。相對其它拓?fù)溆性礊V波器,三相四橋臂有源濾波器可以更好地補償電網(wǎng)中的三相不平衡問題,本文選其為研究對象,建立數(shù)學(xué)模型,為后文的工作奠定了基礎(chǔ)。 其次,本文分析了常用的三相四線制實時諧波檢測算法的檢測原理和特點,進行了仿真分析和比較。仿真分析表明,abc檢測算法和ip-iq-0檢測算法的檢測精度受電網(wǎng)電壓畸變影響較小。abc檢測算法可以省略多次的矩陣變換,通過構(gòu)造不同的正交坐標(biāo)基,可實現(xiàn)特定次諧波及不平衡分量的檢測,通過采用改進的PLL,即使在非理想電網(wǎng)電壓的情況下,該算法也具有很好的諧波檢測效果。 然后,本文結(jié)合PI控制器和PR控制器可分別實現(xiàn)無靜差地跟蹤直、交流參考量的特性,提出了基于αβ坐標(biāo)系比例-積分-雙頻諧振(PI-DFR)的控制策略,其具有較強的諧波補償能力。針對直流側(cè)電壓控制策略,采用特定次諧波電流檢測方式,有效地減小了負(fù)載變化引起的直流側(cè)電壓波動。尤其,針對啟動過程補償電流和電壓的過沖,通過采用雙環(huán)軟啟動的方法削弱了尖端脈沖問題。仿真實驗的結(jié)果驗證了本文控制策略的正確性和有效性。 基于DSP28335芯片,本課題研制了一臺220V/20A三相四橋臂有源濾波器樣機。實驗表明,本文提出的諧波檢測算法、電流控制算法和直流側(cè)電容電壓控制算法有效可靠,具有較好的工程應(yīng)用價值。
[Abstract]:With the rapid development of power electronics technology, a large number of nonlinear load increases rapidly, resulting in low power factor, harmonic, voltage waveform distortion, voltage fluctuation and flicker, three-phase imbalance and other power quality problems become increasingly serious. At present, harmonic suppression and reactive power compensation have become an important subject in power electronics and power system. Active power filter (Active Power Filter, APF) is a new type of power electronic equipment, which can dynamically suppress harmonics and compensate reactive power, and has high controllability and fast response ability. In this paper, three-phase four-arm active filter is taken as the research object, theoretical analysis, simulation and experimental verification are carried out. First of all, this paper introduces the cause of harmonic generation in power system, the harm and the common treatment methods. Then, the current situation of active filter, topology, harmonic detection algorithm and current control algorithm are summarized. Compared with other topological active filters, three-phase four-arm active filters can better compensate for the three-phase imbalance problem in the power network. In this paper, we select the three-phase active filters as the research object and establish the mathematical model, which lays a foundation for the later work. Secondly, this paper analyzes the detection principle and characteristics of three-phase four-wire real-time harmonic detection algorithm, and makes simulation analysis and comparison. Simulation results show that the detection accuracy of abc detection algorithm and ip-iq-0 detection algorithm is less affected by grid voltage distortion. Abc detection algorithm can omit multiple matrix transformations and construct different orthogonal coordinate bases. The detection of specific sub-harmonic and unbalanced components can be realized. By using improved PLL, even in the case of non-ideal grid voltage, the algorithm has a good effect of harmonic detection. Then, according to the characteristics that PI controller and PR controller can track straight and AC reference without static error respectively, a control strategy based on 偽 尾 coordinate system proportional integral-dual frequency resonance (PI-DFR) is proposed. It has strong harmonic compensation ability. Aiming at the DC side voltage control strategy, the DC side voltage fluctuation caused by the load change is effectively reduced by using the special subharmonic current detection method. In particular, aiming at the overshoot of current and voltage in the start-up process, the tip pulse problem is weakened by using double loop soft start method. The simulation results show that the proposed control strategy is correct and effective. Based on DSP28335 chip, a prototype of 220V/20A three-phase four-arm active filter is developed. The experiments show that the harmonic detection algorithm, current control algorithm and DC capacitor voltage control algorithm proposed in this paper are effective and reliable, and have good engineering application value.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN713.8;TM761

【參考文獻】

相關(guān)期刊論文 前10條

1 雷萬鈞,李紅雨,卓放,吳隆輝,王兆安,林烽,紀(jì)勇;基于DFT諧波檢測方法的大容量并聯(lián)型有源電力濾波器的研制[J];電工電能新技術(shù);2004年02期

2 郭希錚;韓強;楊耕;楊公訓(xùn);;可選擇諧波型有源電力濾波器的閉環(huán)控制和實現(xiàn)[J];電工技術(shù)學(xué)報;2006年09期

3 楊秋霞;梁雄國;郭小強;趙清林;;準(zhǔn)諧振控制器在有源電力濾波器中的應(yīng)用[J];電工技術(shù)學(xué)報;2009年07期

4 尹慧;許彥;;有源濾波器的研究現(xiàn)狀及前景展望[J];電力電容器與無功補償;2010年03期

5 劉宏超;彭建春;;三相四線有源電力濾波器的產(chǎn)品實現(xiàn)及其應(yīng)用[J];電力電子技術(shù);2009年06期

6 任碧瑩;孫向東;同向前;羅小英;;并網(wǎng)逆變器的改進無差拍控制策略[J];電力電子技術(shù);2009年08期

7 卞業(yè)偉;沈錦飛;;基于單周控制三相四線制APF的研究[J];電力電子技術(shù);2010年08期

8 趙偉;田銘興;趙慶春;;基于DSP 28335的單相有源濾波控制器設(shè)計[J];電力電子技術(shù);2012年01期

9 李建林,張仲超;關(guān)于諧波及無功電流檢測方法的綜述[J];電力系統(tǒng)及其自動化學(xué)報;2003年04期

10 趙文強;陳國柱;;并聯(lián)型APF在容性非線性負(fù)載中應(yīng)用[J];電力自動化設(shè)備;2009年12期

，

本文編號：2346685