【摘要】：有源電力濾波器(Active Power Filter,APF)被公認為是一種動態(tài)抑制諧波、動態(tài)補償無功功率的新型電力電子裝置。諧波指令電流的檢測、補償電流的產(chǎn)生和跟蹤控制以及APF容量的提高是限制其廣泛應用的三大關鍵技術，本文將對這三個關鍵技術進行研究。 快速準確的諧波檢測是實現(xiàn)補償?shù)南葲Q條件�；谒矔r無功理論的ip-iq法雖然廣泛應用，但是其復雜的坐標變換和低通濾波器的設計影響了檢測的實時性。本文提出一種通過近似構造基波電流來提取諧波電流的方法，即利用負載電流有效值等效替代其基波有效值，利用鎖相環(huán)獲取負載電流基波相位或電網(wǎng)電壓相位構造基波電流。另外，，研究了其直流側(cè)電壓控制策略，進一步分析了該算法的誤差補償和理論延時。最后，仿真和實驗驗證了該檢測算法和控制策略的可行性。 與此同時，補償電流是否有效的跟蹤控制，直接決定APF補償效果。傳統(tǒng)的滯環(huán)電流控制原理簡單，動態(tài)響應快，可靠性高，魯棒性強，但是開關頻率不穩(wěn)定。本文采用一種基于空間矢量的滯環(huán)電流控制新方法，既保留了傳統(tǒng)滯環(huán)控制的優(yōu)點，又在一定程度上穩(wěn)定了開關頻率。通過與傳統(tǒng)滯環(huán)控制策略的仿真對比，證明了該方法的優(yōu)越性。 容量不足是限制APF運用到大容量場合的關鍵因素之一，本文在綜合分析傳統(tǒng)兩電平和多電平APF的優(yōu)缺點的基礎上，采用兩電平多模塊APF并聯(lián)的方法，通過均流，不僅提升了總?cè)萘亢蛦蝹�APF的利用率，還有利于輸入電感的選型。另外，對模塊間是否存在環(huán)流進行了理論分析。在理論分析基礎上建立了MATLAB仿真模型，結(jié)果驗證了所述方法的有效性和分析的正確性。 最后，基于3模塊并聯(lián)的APF實驗平臺，進行了本文所提出的算法的驗證，結(jié)果驗證了所提算法的可行性和正確性。
[Abstract]:Active Power filter (Active Power Filter,APF) is recognized as a new type of power electronic device which can dynamically suppress harmonics and dynamically compensate reactive power. The detection of harmonic instruction current, the generation and tracking control of compensation current and the improvement of APF capacity are the three key technologies that limit its wide application. In this paper, these three key technologies will be studied. Fast and accurate harmonic detection is a prerequisite for compensation. Although the ip-iq method based on instantaneous reactive power theory is widely used, its complex coordinate transformation and the design of low-pass filter affect the real-time performance of detection. In this paper, a method of extracting harmonic current by approximate construction of fundamental current is proposed, that is, the effective value of load current is used to replace the effective value of fundamental wave, and the phase-locked loop is used to obtain the fundamental phase of load current or the voltage phase of power grid to construct the fundamental current. In addition, the DC side voltage control strategy is studied, and the error compensation and theoretical delay of the algorithm are further analyzed. Finally, the feasibility of the detection algorithm and control strategy is verified by simulation and experiment. At the same time, whether the compensation current is effective tracking control directly determines the compensation effect of APF. The traditional hysteretic current control principle is simple, the dynamic response is fast, the reliability is high, the robustness is strong, but the switching frequency is unstable. In this paper, a new method of hysteretic current control based on space vector is adopted, which not only preserves the advantages of traditional hysteretic control, but also stabilizes the switching frequency to a certain extent. Compared with the traditional hysteretic control strategy, the superiority of this method is proved. Insufficient capacity is one of the key factors that limit the application of APF to large capacity occasions. Based on the comprehensive analysis of the advantages and disadvantages of traditional two-level and multi-level APF, this paper adopts the method of two-level and multi-module APF in parallel, through current sharing. It not only improves the total capacity and the utilization rate of a single APF, but also facilitates the selection of input inductor. In addition, the existence of circulation between modules is analyzed theoretically. Based on the theoretical analysis, the MATLAB simulation model is established, and the results verify the effectiveness of the method and the correctness of the analysis. Finally, based on the three-module parallel APF experimental platform, the algorithm proposed in this paper is verified, and the results verify the feasibility and correctness of the proposed algorithm.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN713.8;TM761

【參考文獻】

相關期刊論文 前10條

1 童梅,童杰,蔣靜坪;有源濾波器的神經(jīng)網(wǎng)絡控制[J];電工技術學報;2000年01期

2 伍小杰;羅悅?cè)A;喬樹通;;三相電壓型PWM整流器控制技術綜述[J];電工技術學報;2005年12期

3 王廣柱;;有源電力濾波器諧波及無功電流檢測的不必要性(二)——仿真及實驗[J];電工技術學報;2007年02期

4 于晶榮;滕召勝;章兢;胡楷;;有源電力濾波器預測電流控制及穩(wěn)定性分析[J];電工技術學報;2009年07期

5 陳繼開;李浩昱;楊世彥;寇寶泉;;Tsallis小波包奇異熵與功率譜分析在電力諧波檢測的應用[J];電工技術學報;2010年08期

6 徐先勇;羅志坤;羅安;方璐;吳敬兵;彭瀟;;新型混合有源電力濾波器的特性分析和控制方法[J];電工技術學報;2011年12期

7 于晶榮;粟梅;孫堯;;有源電力濾波器的改進重復控制及其優(yōu)化設計[J];電工技術學報;2012年02期

8 鞠建永;陳敏;徐君;徐德鴻;汪泉;;模塊化并聯(lián)有源電力濾波器[J];電機與控制學報;2008年01期

9 孟凡剛;楊世彥;楊威;;多脈波整流技術綜述[J];電力自動化設備;2012年02期

10 卓放;楊君;王兆安;;有源電力濾波器的發(fā)展動態(tài)及其應用[J];電氣自動化;2000年04期

相關博士學位論文 前4條

1 謝斌;并聯(lián)型有源電力濾波器諧波檢測及控制技術研究[D];華中科技大學;2010年

2 何娜;電力系統(tǒng)諧波檢測及有源抑制技術的研究[D];哈爾濱工業(yè)大學;2008年

3 柳向斌;非線性系統(tǒng)控制的魯棒與自適應設計方法[D];浙江大學;2009年

4 華明;三相逆變器冗余并聯(lián)運行關鍵技術及應用研究[D];南京航空航天大學;2011年

本文編號：2480742