本文選題：背靠背變流器　切入點：功率因數(shù)　出處：《北京工業(yè)大學》2014年碩士論文

【摘要】：隨著能源與環(huán)境問題的日益突出，不同地區(qū)的用電負荷呈現(xiàn)出了多樣性，傳統(tǒng)電網(wǎng)已不能滿足其需求，因此微電網(wǎng)技術逐漸成為電力、電氣等相關技術領域的研究熱點和重點問題。作為微電網(wǎng)核心單元的背靠背變流器技術也得到了廣泛關注。由于背靠背變流器可以實現(xiàn)AC-DC-AC兩端能量的可控交互，且具有功率因數(shù)可調(diào)、輸出電流諧波小、能量雙向流動等特點，在可再生能源分布式發(fā)電、微電網(wǎng)等領域獲得了廣泛應用。本文以三相背靠背變流器控制系統(tǒng)為研究對象，從理論研究、設計調(diào)試及系統(tǒng)實現(xiàn)等方面進行論述。首先，本文在總結分析三相背靠背變流器現(xiàn)階段的國內(nèi)外研究現(xiàn)狀與發(fā)展趨勢的基礎上，根據(jù)系統(tǒng)的性能指標要求，進行了系統(tǒng)設計的可行性分析，進而確定了系統(tǒng)的設計方案。其次闡述了三相背靠背變流器關鍵技術的工作原理，基于坐標變換思想，應用矢量變換的控制算法、SVPWM調(diào)制技術，結合課題采用的交流負載特性，完成永磁同步電機的數(shù)學模型建立與控制策略研究工作�？紤]到系統(tǒng)網(wǎng)側與負載側系統(tǒng)的聯(lián)調(diào)，研究系統(tǒng)啟動邏輯控制與系統(tǒng)協(xié)調(diào)控制策略。 在此基礎上，根據(jù)系統(tǒng)設計方案，文中對系統(tǒng)硬件主要參數(shù)計算與電路設計進行較為詳細地說明，提出了交流進線電抗器與直流穩(wěn)壓電容參數(shù)設計方法和主要電路單元的設計方案�；谌啾晨勘匙兞髌骺刂撇呗�，以控制器DSP（TMS320F2812）為核心，，設計控制系統(tǒng)軟件結構，完成系統(tǒng)軟件程序編寫。使用MATLAB Simulink仿真軟件驗證系統(tǒng)設計的正確性； 最后，文中對根據(jù)系統(tǒng)實驗要求搭建的三相背靠背變流器系統(tǒng)試驗平臺進行介紹，并對系統(tǒng)整體調(diào)試數(shù)據(jù)和實時波形進行分析，從而充分驗證了課題研究中三相背靠背變流器系統(tǒng)設計與控制策略的可行性與正確性。
[Abstract]:With the increasingly prominent energy and environmental problems, different regions of the load presents diversity, the traditional power grid can no longer meet its needs, so micro-grid technology is becoming power. The technology of back-to-back converter, which is the core unit of microgrid, has been paid more and more attention. Because back-to-back converter can realize the controllable interaction of energy between two ends of AC-DC-AC, With the characteristics of adjustable power factor, low output current harmonics, two-way energy flow and so on, it has been widely used in the fields of renewable energy distributed generation, micro-grid, etc. In this paper, the three-phase back-to-back converter control system is taken as the research object. First of all, on the basis of summarizing and analyzing the current domestic and international research status and development trend of three-phase back-to-back converter, according to the performance requirements of the system, this paper discusses the theoretical research, design and debugging, and system implementation. The feasibility of the system design is analyzed, and then the design scheme of the system is determined. Secondly, the working principle of the key technology of the three-phase back-to-back converter is expounded. Based on the idea of coordinate transformation, the SVPWM modulation technology is applied to the control algorithm of vector transformation. Based on the characteristics of AC load, the mathematical model and control strategy of permanent magnet synchronous motor (PMSM) are studied. Considering the connection between system network side and load side system, the system startup logic control and system coordinated control strategy are studied. On this basis, according to the system design scheme, the main parameters calculation and circuit design of the system hardware are described in detail. This paper presents the design method of parameters of AC feed-in reactor and DC voltage stabilized capacitor and the design scheme of main circuit unit. Based on the control strategy of three-phase back-to-back converter, the software structure of control system is designed based on the controller DSPF2812 (TMS320F2812). Complete the system software programming. Use MATLAB Simulink simulation software to verify the correctness of the system design; Finally, the test platform of three-phase back-to-back converter system is introduced, and the debugging data and real-time waveform of the system are analyzed. The feasibility and correctness of the design and control strategy of the three-phase back-to-back converter system are fully verified.
【學位授予單位】：北京工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM46

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本文編號：1695454