本文關(guān)鍵詞：基于諧振控制的三相四橋臂逆變電源研究　出處：《華中科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 三相四橋臂逆變器 標(biāo)量PWM 諧振控制器 不平衡度

【摘要】：三相電壓的不平衡度是電源質(zhì)量的一個(gè)很重要的指標(biāo)，尤其是對(duì)于需要帶單相負(fù)載等不平衡負(fù)載的場(chǎng)合。應(yīng)用于航空領(lǐng)域的中頻電源，其所帶的負(fù)載是多種多樣的，既有平衡負(fù)載，也有非線性不平衡負(fù)載。如何實(shí)現(xiàn)在各種負(fù)載情況下逆變電源均能輸出三相對(duì)稱且畸變率小的電壓波形的研究具有重要的意義。 對(duì)三相逆變器帶不平衡負(fù)載的研究主要集中在逆變器的拓?fù)浣Y(jié)構(gòu)和控制策略上，本文選擇了最具優(yōu)勢(shì)的三相四橋臂逆變拓?fù)浣Y(jié)構(gòu)作為逆變電源的主電路結(jié)構(gòu)，在三相靜止坐標(biāo)系以及旋轉(zhuǎn)坐標(biāo)系下建立了其數(shù)學(xué)模型。由于四橋臂結(jié)構(gòu)的特殊性，其PWM調(diào)制方式也是一個(gè)主要的研究部分，常用的三維空間矢量調(diào)制（3D-SVPWM）方式實(shí)現(xiàn)復(fù)雜且計(jì)算量大，本文采用了一種基于載波比較的標(biāo)量PWM調(diào)制方式，對(duì)其原理及實(shí)現(xiàn)方法進(jìn)行了詳細(xì)的分析，其實(shí)現(xiàn)簡(jiǎn)單且具有空間矢量調(diào)制方式的諸多優(yōu)點(diǎn)。 諧振控制器具有對(duì)交流信號(hào)的無(wú)靜差跟蹤能力，本文在0坐標(biāo)系中，，在電壓電流雙環(huán)控制結(jié)構(gòu)的基礎(chǔ)上提出了一種新的控制策略。該控制系統(tǒng)不僅實(shí)現(xiàn)了對(duì)零序分量的獨(dú)立控制，而且可以保證對(duì)正序以及負(fù)序分量的準(zhǔn)確跟蹤，同時(shí)諧波諧振控制器的加入可以降低輸出電壓的諧波含量。并且利用Nyquist穩(wěn)定判據(jù)對(duì)含有諧振控制器的系統(tǒng)進(jìn)行了穩(wěn)定性分析。 最后，在Matlab/Simulink環(huán)境中搭建了系統(tǒng)的仿真模型，對(duì)所設(shè)計(jì)的系統(tǒng)的動(dòng)態(tài)和穩(wěn)態(tài)性能進(jìn)行仿真分析，仿真驗(yàn)證了所提出的控制策略的有效性。
[Abstract]:The three-phase voltage unbalance is a very important index of power quality, especially for the need to load with single phase unbalanced load conditions. The medium frequency power supply used in aviation field, the load belt is varied, both have nonlinear load balanced and unbalanced load. How to realize the in all kinds of load conditions of inverter power supply can is of great significance to study the output three-phase symmetrical voltage waveform distortion rate and small.
The three-phase inverter with unbalanced load research mainly focuses on the topology and control strategy of inverter, this paper chose the three-phase four leg inverter is the most advantage as the main circuit structure of inverter in three-phase static coordinate system and the rotating coordinate system the mathematical model is established. Because of the particularity of the four bridge arm structure, the PWM modulation is also a major part of the research of 3D space vector modulation (3D-SVPWM) commonly used to achieve complex and large amount of calculation, this paper uses a scalar PWM modulation carrier based on comparison of the principle and realization method are analyzed in detail. The advantages of the simple with space vector modulation.
The resonant controller has no static error tracking ability of AC signal, based on the 0 coordinate system, based on the voltage and current loop control structure puts forward a new control strategy. The control system not only realizes the independent control of the zero sequence component, and can guarantee to the positive sequence and negative sequence components for accurate tracking at the same time, adding a harmonic resonant controller can reduce the harmonic content of output voltage. And the use of Nyquist on the system stability criterion with resonant controller for the stability analysis.
Finally, a simulation model is built in the Matlab/Simulink environment, and the dynamic and steady performance of the designed system is simulated and analyzed. The effectiveness of the proposed control strategy is verified by simulation.

【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM464

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1 楊振萍,潘學(xué)軍;交流電橋臂的配置與靈敏度[J];四川師范大學(xué)學(xué)報(bào)(自然科學(xué)版);1999年02期

2 官二勇;宋平崗;葉滿園;;基于三次諧波注入法的三相四橋臂逆變電源[J];電工技術(shù)學(xué)報(bào);2005年12期

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