本文選題：有源電力濾波器　切入點：多電平電路　出處：《東北石油大學》2015年碩士論文　論文類型：學位論文

【摘要】：電力電子設備的大量使用會給電能質(zhì)量造成污染,由諧波引起的各種故障和事故經(jīng)常給社會造成巨大經(jīng)濟損失。有源電力濾波器(Active Power Filter,APF)是消除電網(wǎng)各次諧波補償無功功率的有效手段,其在國內(nèi)外生產(chǎn)中也有應用。但隨著電網(wǎng)的發(fā)展,裝機容量的提高,對APF的要求也隨之增加,但APF受到電力電子器件的功率和控制效果互相制約的限制,對于提高APF的容量并維持系統(tǒng)良好的性能是近幾年APF研究的新方向。本文主要研究的重點多電平有源濾波器的主電路結(jié)構(gòu)、諧波檢測方法以及相應的控制策略。首先對有源電力濾波器國內(nèi)外當前的研究現(xiàn)狀進行分析介紹,并對未來發(fā)展的趨勢進行闡述。之后對有源濾波器的濾波原理進行分析,并介紹有源濾波器的分類結(jié)構(gòu),對本文所言研究的多電平有源濾波器的主電路結(jié)構(gòu)進行詳細介紹,在對經(jīng)典主電路結(jié)構(gòu)的研究基礎上提出一種新型的多電平主電路結(jié)構(gòu),該結(jié)構(gòu)在開關數(shù)目上有所減少,且易于實現(xiàn)模塊化,對其工作原理進行分析,并對其進行數(shù)學模型分析,得到所設計的新型主電路結(jié)構(gòu)可采用線性分析的結(jié)論。其次,介紹幾種諧波檢測理論并比較其優(yōu)缺點,對基于瞬時無功功率理論的諧波檢測原理進行詳細介紹,并對其常用的qp?和qpii?兩種諧波電流檢測方法進行詳細介紹,在qpii?檢測法的基礎上進行改進,省略相間坐標變換環(huán)節(jié),在電壓變換處增加預置補償角以配合開關器件的死區(qū)時間,并通過MATLAB仿真軟件對上述三種方法進行比較驗證。再次,本文分析多電平有源電力濾波器的控制策略,簡述階梯波調(diào)制法、三角載波調(diào)制法、空間矢量調(diào)制法、Sigma-delta調(diào)制法以及特定諧波消去控制的特性及優(yōu)缺點。確定本文采用特定諧波消去控制,詳細論述特定諧波消去法的構(gòu)成、控制原理以及控制特性,并分析該控制法在本文所設計結(jié)構(gòu)中所存在的研究重點與實現(xiàn)方法,在其基礎上對初值選取進行改進,并利用牛頓艾特金加速公式,提高控制計算速度。最后,對其仿真參數(shù)進行設計,搭建仿真模型,應用MATLAB仿真軟件進行仿真驗證。仿真結(jié)果表明,本文提出的新型多電平主電路結(jié)構(gòu)、改進的qpii?檢測方法和特定諧波消去控制方法的正確性和有效性。
[Abstract]:The extensive use of power electronic equipment will pollute the power quality. All kinds of faults and accidents caused by harmonics often cause huge economic losses to the society. Active Power filter (APF) is an effective means to eliminate the harmonic compensation of reactive power. But with the development of power grid and the increase of installed capacity, the requirement of APF is also increased. However, APF is restricted by the power and control effect of power electronic devices. To improve the capacity of APF and maintain the good performance of the system is a new direction of APF research in recent years. The harmonic detection method and the corresponding control strategy. Firstly, the current research situation of APF at home and abroad is introduced, and the future development trend is described. Then, the filter principle of APF is analyzed. The classification structure of active power filter is introduced, and the main circuit structure of multilevel active power filter studied in this paper is introduced in detail. Based on the research of classical main circuit structure, a new multilevel main circuit structure is proposed. The structure is easy to be modularized and reduced in the number of switches. The working principle of the structure is analyzed, and the mathematical model is analyzed. The conclusion that the new main circuit structure can be designed by linear analysis is obtained. Several harmonic detection theories are introduced and their advantages and disadvantages are compared. The harmonic detection principle based on instantaneous reactive power theory is introduced in detail. And qpii? Two harmonic current detection methods are introduced in detail in qpii? The detection method is improved by omitting the phase coordinate transformation link, adding preset compensation angle at the voltage conversion to match the dead time of the switch device, and comparing the above three methods with the MATLAB simulation software. In this paper, the control strategy of multilevel active power filter is analyzed. The characteristics, advantages and disadvantages of Sigma-delta modulation method and special harmonic elimination control method are discussed in detail, and the constitution, control principle and control characteristics of specific harmonic elimination method are discussed in detail. The research emphasis and implementation method of the control method in the structure designed in this paper are analyzed. On the basis of it, the selection of initial value is improved, and the speed of control calculation is improved by using Newton Aitkin's accelerated formula. The simulation parameters are designed, the simulation model is built, and the simulation is verified by MATLAB software. The simulation results show that the proposed new multilevel main circuit structure, the improved qpii? The correctness and effectiveness of the detection method and the specific harmonic elimination control method.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM761.12;TN713.8

【參考文獻】

相關期刊論文 前2條

1 盧秀和;徐銘;;基于瞬時無功功率理論的高次諧波電流檢測方法研究[J];電測與儀表;2010年02期

2 曾瑞江;楊震斌;柳慧超;;基于小波變換的電力系統(tǒng)諧波檢測方法研究[J];電力系統(tǒng)保護與控制;2012年15期

相關碩士學位論文 前1條

1 童鳴庭;三相T型三電平非隔離并網(wǎng)逆變器的研究[D];合肥工業(yè)大學;2013年

，

本文編號：1559781