發(fā)布時(shí)間：2019-01-17 19:04

【摘要】：脈寬調(diào)制(Pulse-Width Modulation)逆變電源的控制方法是現(xiàn)在電力電子技術(shù)的重要研究課題。隨著電力電子技術(shù)的不斷發(fā)展,電流控制電壓型逆變電源(CC-PWM逆變電源)不僅要求逆變電源具有良好的可靠性,也要求具有優(yōu)良的動(dòng)態(tài)響應(yīng)特性。在三相逆變電源脈寬調(diào)制中,滯環(huán)電流控制具有控制方式簡(jiǎn)單、易于硬件實(shí)現(xiàn)、工作可靠、無(wú)跟蹤誤差、動(dòng)態(tài)響應(yīng)快和魯棒性好等優(yōu)點(diǎn),在工業(yè)領(lǐng)域中的應(yīng)用廣泛。本文研究了逆變電源的發(fā)展以及應(yīng)用現(xiàn)狀,具體分析了電壓源電流型逆變電源的控制方法和研究進(jìn)展,詳細(xì)分析了電壓源電流型逆變電源的原理、拓?fù)浣Y(jié)構(gòu)和數(shù)學(xué)模型,對(duì)于目前各種電流控制方法,進(jìn)行討論和對(duì)比分析。對(duì)傳統(tǒng)電壓源電流型逆變電源滯環(huán)控制進(jìn)行分析,找出了傳統(tǒng)滯環(huán)電流控制方法存在的問(wèn)題,如開(kāi)關(guān)頻率不固定,開(kāi)關(guān)頻率高造成的開(kāi)關(guān)損耗,影響開(kāi)關(guān)器件的性能,電流誤差大,系統(tǒng)的動(dòng)態(tài)響應(yīng)低等。為了解決傳統(tǒng)滯環(huán)控制出現(xiàn)的問(wèn)題,采用了 4種不同的滯環(huán)控制方法分別是基于空間矢量滯環(huán)電流控制方法、基于電流誤差微分雙滯環(huán)電流控制方法、不對(duì)稱(chēng)雙滯環(huán)電流控制方法、時(shí)序雙滯環(huán)電流控制方法,分別進(jìn)行了原理分析,利用Matlab/Simulink對(duì)幾種控制方法進(jìn)行了相應(yīng)的建模仿真之后,進(jìn)行比較分析,仍然存在電流誤差過(guò)大,三相開(kāi)關(guān)次數(shù)不對(duì)稱(chēng),使三相控制不對(duì)稱(chēng),動(dòng)態(tài)控制性能不夠高等問(wèn)題。因此,結(jié)合以上各種方法中的結(jié)果分析后,提出了兩種改進(jìn)型三相電壓源電流型逆變電源的控制方法,為改進(jìn)型空間矢量雙滯環(huán)電流控制方法和改進(jìn)型三態(tài)控制滯環(huán)電流控制方法,對(duì)兩種方法進(jìn)行了原理分析。在Matlab/Simulink平臺(tái)上,對(duì)兩種改進(jìn)型雙滯環(huán)電流控制方法進(jìn)行建模和仿真分析,驗(yàn)證了本系統(tǒng)采用的電流控制方法,降低了開(kāi)關(guān)頻率,減小了電流誤差,提高了系統(tǒng)的動(dòng)態(tài)響應(yīng)性能。
[Abstract]:The control method of pulse width modulation (Pulse-Width Modulation) inverter is an important research topic in power electronics technology. With the development of power electronics technology, current controlled voltage type inverter (CC-PWM inverter) not only requires good reliability of inverter, but also requires excellent dynamic response characteristics. In the pulse width modulation of three-phase inverter power supply, hysteresis current control has the advantages of simple control mode, easy hardware implementation, reliable operation, no tracking error, fast dynamic response and good robustness. It is widely used in industrial field. In this paper, the development and application of the inverter power supply are studied, the control methods and research progress of the voltage source current type inverter are analyzed, and the principle, topology and mathematical model of the voltage source current type inverter are analyzed in detail. The current control methods are discussed and compared. This paper analyzes the hysteresis control of traditional voltage source and current inverter power supply, and finds out the problems existing in the traditional hysteresis current control method, such as the switching frequency is not fixed, the switching loss caused by the high switching frequency is high, and the performance of the switch device is affected. The current error is large and the dynamic response of the system is low. In order to solve the problem of traditional hysteresis control, four different hysteresis control methods are adopted, which are based on space vector hysteresis current control method and current error differential double hysteresis current control method. The principle of asymmetrical double hysteresis current control method and sequential double hysteresis current control method are analyzed respectively. Several control methods are modeled and simulated by Matlab/Simulink. There are still some problems such as too large current error, asymmetrical number of three-phase switches, asymmetry of three-phase control and insufficient performance of dynamic control. Therefore, based on the analysis of the results of the above methods, two improved control methods of three-phase voltage-source current-type inverter are proposed. In order to improve the space vector double hysteresis current control method and the improved three state control hysteresis current control method, the principle of the two methods is analyzed. On the Matlab/Simulink platform, two improved double hysteresis current control methods are modeled and simulated. The results show that the current control method adopted in this system can reduce the switching frequency and current error. The dynamic response performance of the system is improved.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM464

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