pwm整流器的仿真研究優秀畢業論文-資料下載頁

　　

【正文】 出的正弦調整波，來控制功率器件的通斷，從而起到了PWM控制的效果，使整個系統呈現低諧波特性。（7）。可見在突加負載突減負載時，系統就能跟蹤給定，從而有較好地動態響應能力與抗干擾能力。 由以上響應波形可以看出，系統所選擇的雙閉環控制策略具有較好的動態性能和穩態性能。總結為有效地解決電力電子裝置對電網質量的污染問題，本文對于PWM整流器及其控制策略進行了研究。總結本文所做的工作，主要結論如下:首先，本文詳細說明了PWM整流器的工作原理，分析了PWM整流器在各種工作狀態下交流側穩態電壓電流矢量的關系，并基于開關函數和占空比兩種描述方法建立了PWM整流器的三相數學模型。其次，本文研究了PWM整流器的控制策略，闡述了間接電流控制策略和直接控制策略的基本原理和特點，并對直接電流控制中的基于電流前饋解耦控制方法進行了詳細的說明，詳細推導了電流前饋解耦的步驟，建立了PWM整流器的電流前饋解耦控制模型。最后，基于MATLAB /SIMULINK軟件，進行仿真研究，采集了實驗波形并進行了分析比較，驗證系統設計的正確性和可靠性，獲得了良好的控制效果和系統性能。參考文獻[1] 張加勝，(10)：3741[2] 武志賢，蔡麗娟，2005(35)[3] 張崇魏，：機械工業出版社，2003 [4] [博士學位論文].合肥：合肥工業大學，2003 [5] and . A threephase regulated PWM rectifier with online feedforward input unbalance correction. IEEE Electron. 1996(10):526532[6] V. M. Cardenas, C. Nunez, . “Analysis and Evaluation of Control Techniques for Active Power Filters: Sliding Mode Control and Control”.IEEE （9）:649654[7] ,Andrzej . A parative study of control techniques for PWM rectifier in ac adjustable speed drives. IEEE . 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IEEE . 2004(4):447453[10] [碩士學位論文].北京：北方工業大學，2009 [11] 接峰，三項PWM整流器及其控制[碩士學位論文].杭州：浙江大學2006[12] 趙仁德，(8)：6772 [13] 熊健，. 2002(7)：4448[14] (8)：6772[15] 周京華，(38)：2730 [16] 王兆安，：機械工業出版社，2000[17] ：機械工業出版社，2000[18] 董曉鵬， (11)： 3941 [19] (第四版).北京：科學出版社,2001[20] 楊德剛，劉潤生，15(2)：8387[21] 楊德剛，趙良炳，.1999(10)：4951[22] 田亞菲，(SVPWM). 2004(8): 6871.[23] 王中禮，段慧達,—:清華大學出版社，2007[24] ：中國電力出版社，2009[25] 朱桂萍，(第2版).北京：清華大學出版社，2008翻譯部分英文原文Modeling and Simulation of Three Phase High Power Factor PWM RectifierYu Fang*, Yong Xie * and Yan Xing**College of Information Engineering of Yangzhou University, Yangzhou, *AeroPower Sictech Center, Nanjing University of Aeronautics and astronautics Nanjing 210016,AbstractNumerical simulation methodology based on high frequency mathematical model of high power factor PWM rectifier is proposed in this paper. And input to output transform function is deduced. With the help of input to output transform function, the design method of voltage regulator has been presented. The simulation for threephase PWM rectifier is implemented with Rungekutta, thus prehensive simulation can be achieved with M file in MATLAB. Finally, the simulation results and experimental results are given. The plete agreement with the results of simulation and experiment manifests that the proposed simulation method in this paper is effective. Of course, the design period of threephase high power factor PWM rectifier can be shortened by virtue of proposed simulation methodology.Key words— power factor correction。 SVPWM。 Numerical simulationI. INTRODUCTIONPWM rectifier is main technique applied in large unit power factor. Three phase PWM rectifier can be cataloged in voltage and current types, in which current type rectifier may employ many kinds of conventional PWM techniques, however, input line current is discontinuous and output voltage ripple is much larger. While voltage type topology not only adopt many appropriate control strategies but also implementsbidirectional energy flow, and its main merit is that far dynamic response and simple configure. And smaller input filter can achieve lower EMI. Consequently, the voltage type PWM rectifier is usually served as power factor correction.SVPWM is the best way to suppress harmonics [14],and used to adjust motor velocity. Especially it can attain low harmonics even in lower operating frequency. SVM can shape the input voltages of three phase bridge converter into rotating circular voltage vector. With the development of DSP, SVPWM have been easilyimplemented so far. And another merit employing SVPWM in PWM inverter can achieve 15% more fundamental ponent among output voltage. Hence, if employed SVPWM technique in PWM rectifier, the use efficiency of DC voltage will be higher close to unit. As the result that the voltage stresses across switches is decreased.The best way to implement SVPWM is digital to that DSP have been mercialized, high performance digitalized SMPS e to true. However, it is hard to program to implement controller in DSP, which result in longer development period. This case is remarkable in the design of three phase power factor correction。 because in this case many control variables need to control and double closed loops must be acplished. In face of this point, the numerical simulation methodology based on high frequency mathematical model of high power factor PWM rectifier is proposed in this paper. The simulation program contains the voltage regulator, current controller and the SVPWM, so we can call it prehensive system simulation for PFC. The total simulation is implemented with M file in MATLAB, hence we only translate the M file into the DSP language to achieve digitalized three phase power factor correction. Consequently the pensation parameters can be optimized in simulation and the design period will be greatly shortened design cost cut. It is clear that the proposed simulation methodology is valuable for fast design of threephasePFC and may be used for reference to other digitalized SMPS design.In this paper, the high frequency mathematical model is developed firstly, and then the control to output transformation function is deduced based on instantaneous power theory. It is nature that the voltage regulator is given and the PI regulator is testified to work here. In this way, we write these mathematic models into program in M file. And finally the simulation results and experimental results are given. The plete agreement with the results of simulation and experiment verify that the proposed simulation method i