本文選題：功率因數(shù)校正 + 電流型PWM整流器�。� 參考：《南京航空航天大學(xué)》2014年碩士論文

【摘要】：諧波和功率因數(shù)是主要的電能質(zhì)量問題，其治理方法是電力電子領(lǐng)域一個(gè)重要的研究熱點(diǎn)，PWM整流器作為功率因數(shù)校正方法之一，克服了傳統(tǒng)整流器能量單向流動(dòng)、低功率因數(shù)、高諧波含量以及可控性差等缺點(diǎn)，已逐漸應(yīng)用于國(guó)民經(jīng)濟(jì)中各個(gè)部門。PWM整流器按輸出源特性可分為電壓型與電流型PWM整流器兩類，相對(duì)于電壓型PWM整流器，電流型PWM整流器發(fā)展較晚，但近年隨著器件、調(diào)制及控制的發(fā)展，具有內(nèi)在電流限制能力的電流型PWM整流器應(yīng)用范圍越來越廣，主要應(yīng)用在電機(jī)驅(qū)動(dòng)、超導(dǎo)儲(chǔ)能、脈沖電源、感應(yīng)加熱以及新能源發(fā)電等場(chǎng)合。順應(yīng)發(fā)展趨勢(shì)，本文針對(duì)三相電流型PWM整流器及其控制等進(jìn)行研究。 本文首先針對(duì)三相電流型PWM整流器的電路拓?fù)浔举|(zhì)進(jìn)行分析，得出電壓型PWM整流器與電流型PWM整流器電路本質(zhì)的衍生過程，而且還從控制目標(biāo)的角度分析了電流型PWM整流器的工作原理，并建立了基于dq坐標(biāo)系下的數(shù)學(xué)模型，在數(shù)學(xué)模型的基礎(chǔ)上對(duì)三相電流型PWM整流器進(jìn)行靜態(tài)特性分析，總結(jié)出其內(nèi)在運(yùn)行規(guī)律。此外還著重對(duì)信號(hào)發(fā)生技術(shù)與器件應(yīng)力進(jìn)行探索分析，得出信號(hào)發(fā)生技術(shù)的設(shè)計(jì)方法、電流型PWM整流器的緩沖電路設(shè)計(jì)依據(jù)以及功率半導(dǎo)體器件的損耗分布情況等結(jié)論。 本文還重點(diǎn)對(duì)三相電流型PWM整流器的功率因數(shù)運(yùn)行能力以及有源阻尼控制進(jìn)行研究與仿真分析。功率因數(shù)運(yùn)行能力不僅與負(fù)載類型及大小、調(diào)制比、負(fù)載電流與LC濾波器參數(shù)有關(guān)，而且還與控制方法密切相關(guān)，，通過MATLAB仿真得出四種控制方法功率因數(shù)運(yùn)行能力的優(yōu)劣順序。對(duì)于有源阻尼控制的研究是在總結(jié)所有無(wú)源阻尼方案的阻尼特性與濾波特性基礎(chǔ)上發(fā)展的，提出了共計(jì)16種基于虛擬阻抗的有源阻尼控制策略，并且分析總結(jié)了各方法的特點(diǎn)及其之間的一般性，通過仿真驗(yàn)證了所述有源阻尼控制策略的有效性，且從仿真結(jié)果中總結(jié)出基于不同無(wú)源阻尼方案、不同反饋電量、不同阻尼電阻大小與功率因數(shù)運(yùn)行能力之間的規(guī)律。 本文最后設(shè)計(jì)了3kW三相電流型PWM整流器的硬件與軟件系統(tǒng)，并提出一種實(shí)現(xiàn)疊流時(shí)間的新方法，能獲取更高的疊流時(shí)間精度。在實(shí)驗(yàn)系統(tǒng)的基礎(chǔ)上，進(jìn)行了三相電流型PWM整流器的開環(huán)實(shí)驗(yàn)、閉環(huán)穩(wěn)態(tài)實(shí)驗(yàn)以及動(dòng)態(tài)實(shí)驗(yàn)，總結(jié)出閉環(huán)實(shí)驗(yàn)的穩(wěn)態(tài)結(jié)果，實(shí)驗(yàn)結(jié)果驗(yàn)證了理論分析的正確性。
[Abstract]:Harmonic and power factor are the main power quality problems. Its treatment method is an important research hotspot in the field of power electronics. As one of the power factor correction methods, it overcomes the unidirectional flow of energy and low power factor of the traditional rectifier. Because of the disadvantages of high harmonic content and poor controllability, the PWM rectifier has been gradually used in various sectors of the national economy. According to the characteristics of the output source, it can be divided into two categories: voltage source and current source PWM rectifier, relative to the voltage source PWM rectifier. Current-source PWM rectifier developed late, but in recent years, with the development of device, modulation and control, the application of current-source PWM rectifier with inherent current-limiting capability is becoming wider and wider. It is mainly used in motor drive, superconducting energy storage, pulse power supply, etc. Induction heating and new energy generation and other occasions. According to the trend of development, this paper studies the three-phase current-source PWM rectifier and its control. In this paper, the circuit topology nature of three-phase current-source PWM rectifier is analyzed firstly, and the derivation process of the circuit essence of voltage-source PWM rectifier and current-source PWM rectifier is obtained. Moreover, the working principle of current-source PWM rectifier is analyzed from the point of view of control objective, and the mathematical model based on DQ coordinate system is established. Based on the mathematical model, the static characteristics of three-phase current-source PWM rectifier are analyzed. Summed up its internal operation law. In addition, the signal generation technology and the stress of the device are analyzed, and the design method of the signal generation technology, the design basis of the buffer circuit of the current-source PWM rectifier and the loss distribution of the power semiconductor device are obtained. This paper also focuses on the power factor operation capability and active damping control of three-phase current-source PWM rectifier. The operation ability of power factor is not only related to the load type and size, modulation ratio, load current and LC filter parameters, but also closely related to the control method. Through MATLAB simulation, the order of power factor running ability of four control methods is obtained. The research of active damping control is based on summing up the damping characteristics and filtering characteristics of all passive damping schemes. A total of 16 active damping control strategies based on virtual impedance are proposed. The characteristics of each method and the generality between them are analyzed and summarized. The effectiveness of the active damping control strategy is verified by simulation, and the different feedback quantity based on different passive damping schemes is concluded from the simulation results. The law between different damping resistance and power factor operation ability. In the end, the hardware and software system of 3kW three-phase current-source PWM rectifier is designed, and a new method to realize stack time is proposed, which can obtain higher precision of stack time. On the basis of the experimental system, the open-loop experiment, closed-loop steady state experiment and dynamic experiment of three-phase current-source PWM rectifier are carried out, and the steady state results of the closed-loop experiment are summarized. The experimental results verify the correctness of the theoretical analysis.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM461

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相關(guān)期刊論文 前3條

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本文編號(hào)：1893661