本文關(guān)鍵詞：基于三相橋式逆變器的單相-三相變換電路研究　出處：《華北電力大學》2015年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 單相-三相 逆變器 電流滯環(huán) 參數(shù)設(shè)計 負載檢測 鎖相環(huán)

【摘要】：隨著國民經(jīng)濟的發(fā)展和人們生活水平的提高,社會整體用電量呈現(xiàn)快速上升趨勢。用電環(huán)境日益復(fù)雜,用電設(shè)備日趨多元化,使得單相電源向三相負載供電的問題也越來越不容忽視。除了非常典型的電氣化鐵道牽引供電系統(tǒng)采用單相供電(或兩相)以外,在部分工業(yè)用電與民用負荷中也存在相應(yīng)的需求,長期以來都沒能得到足夠的重識。本文主要研究內(nèi)容包括：(1)總結(jié)了國內(nèi)外現(xiàn)有的各種單相-三相變換方法,對比了各自的優(yōu)缺點。經(jīng)過研究分析,提出了一種新型的基于三相橋式逆變器的單相-三相變換電路拓撲,并對該拓撲的工作原理進行了詳細的理論分析。(2)為便于控制實現(xiàn),本文通過測量負載側(cè)電壓和電流計算負載阻抗,并引入三相數(shù)字鎖相環(huán)技術(shù)輔助阻抗測量,根據(jù)其傳遞函數(shù)、伯德圖分析了其系統(tǒng)性能。新型單相-三相變換電路采用電流滯環(huán)PWM控制方法,并在PSCAD/EMTDC電磁暫態(tài)仿真軟件平臺上搭建了主電路和控制器等仿真模型。(3)對主電路中的輸出側(cè)電抗器、直流側(cè)電容以及濾波環(huán)節(jié)的器件參數(shù)進行了具體分析和計算。(4)針對固定負載和變化負載兩種情況,利用PSCAD/EMTDC仿真軟件對本文提出的單相-三相變換拓撲及控制方法進行了驗證。仿真結(jié)果表明：本文所提出的電路拓撲和配套的控制方法能夠快速響應(yīng)負載變化,將單相電源轉(zhuǎn)換為三相負載所需的三相對稱電源。
[Abstract]:With the development of the national economy and the improvement of people's living standards, the overall power consumption of the society is rising rapidly, the electricity environment is becoming more and more complex, and the power equipment is becoming more and more diversified. The problem of single-phase power supply to three-phase load can not be ignored more and more, except for the very typical electrified railway traction power supply system using single-phase power supply (or two-phase). There is also a corresponding demand in some industrial electricity consumption and civil load. For a long time, we have not been able to get enough recognition. The main research contents of this paper include: 1) summarize the existing single-phase and three-phase transformation methods at home and abroad, compare their advantages and disadvantages. Through research and analysis. A novel single-phase and three-phase converter topology based on three-phase bridge inverter is proposed, and the working principle of the topology is analyzed in detail. In this paper, the load impedance is calculated by measuring the load side voltage and current, and the three-phase digital phase-locked loop (DPLL) technique is introduced to assist the impedance measurement, according to its transfer function. The new single-phase to three-phase conversion circuit adopts the current hysteresis PWM control method. The output side reactor in the main circuit is built on the PSCAD/EMTDC electromagnetic transient simulation software platform, such as main circuit and controller. The DC side capacitance and the device parameters of filter link are analyzed and calculated in detail. The topology and control method of the single-phase to three-phase transformation proposed in this paper are verified by PSCAD/EMTDC simulation software. The simulation results show that:. The proposed circuit topology and corresponding control methods can quickly respond to load changes. A three-phase symmetrical power supply needed to convert a single-phase power supply to a three-phase load.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM464

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