本文選題：PWM整流器 + 內(nèi)�？刂�　； 參考：《湘潭大學(xué)》2014年碩士論文

【摘要】：近年來，電力電子與電力變換行業(yè)大力提倡電能“綠色變換”，傳統(tǒng)的整流電路給電網(wǎng)帶來大量諧波和無功污染，不符合行業(yè)發(fā)展方向。三相PWM整流器具有輸入正弦化、網(wǎng)側(cè)電流低諧波、實(shí)現(xiàn)單位功率因數(shù)運(yùn)行、能量可雙向流動(dòng)、和直流電壓可控等優(yōu)點(diǎn)，可從根本上解決整流所帶來的諧波和無功污染問題。因此，在工業(yè)應(yīng)用領(lǐng)域得到了極為廣泛的應(yīng)用。本文對(duì)三相PWM整流器進(jìn)行了研究，主要內(nèi)容如下： 一、對(duì)三相PWM整流器系統(tǒng)的拓?fù)浣Y(jié)構(gòu)進(jìn)行分析，建立了其在三種常用坐標(biāo)系下的數(shù)學(xué)模型。為了消除兩相旋轉(zhuǎn)dq坐標(biāo)系下dq軸的耦合項(xiàng)ω L，分析了采用PI調(diào)節(jié)器電流前饋解耦控制過程。鑒于電流前饋解耦PI參數(shù)整定的復(fù)雜過程，本文將內(nèi)�？刂七\(yùn)用于系統(tǒng)解耦，該方法設(shè)計(jì)過程簡單，參數(shù)調(diào)試方便，解耦過程不依賴精確系統(tǒng)參數(shù)和模型參數(shù)。在Matlab中對(duì)PI調(diào)節(jié)電流前饋解耦與內(nèi)模解耦進(jìn)行了仿真比較，結(jié)果表明了內(nèi)模調(diào)節(jié)器的設(shè)計(jì)不僅對(duì)PWM整流器參數(shù)的依賴性較小，容易調(diào)整，并且具有優(yōu)良的電流內(nèi)環(huán)動(dòng)態(tài)響應(yīng)性能。 二、為了改善電壓外環(huán)，本文將滑模變結(jié)構(gòu)理論運(yùn)用于控制系統(tǒng)的電壓外環(huán)設(shè)計(jì)。提出了一種基于滑模變結(jié)構(gòu)三相PWM整流器內(nèi)�？刂撇呗�，滑模電壓外環(huán)，跟蹤直流輸出指令電壓并輸出內(nèi)環(huán)指令電流，內(nèi)模控制電流內(nèi)環(huán)，跟蹤指令電流并使網(wǎng)側(cè)電壓電流正弦化。最后，通過構(gòu)建電流內(nèi)環(huán)和電壓外環(huán)的控制框圖，搭建了基于MATLAB/simulink仿真實(shí)驗(yàn)平臺(tái)的三相PWM整流器系統(tǒng)的仿真模型，仿真結(jié)果表明，，系統(tǒng)具有響應(yīng)速度快、跟蹤精度高、抗干擾能力強(qiáng)等特點(diǎn)。 三、根據(jù)所提出滑模變結(jié)構(gòu)三相PWM整流器內(nèi)�？刂圃�，搭建了10kW單個(gè)PWM整流器模塊實(shí)驗(yàn)平臺(tái)，設(shè)計(jì)了三相PWM整流器系統(tǒng)硬件和軟件，其中控制系統(tǒng)硬件包括采樣電路、驅(qū)動(dòng)及保護(hù)電路、軟啟動(dòng)電流、過零鎖相電路等；控制系統(tǒng)軟件采用TI公司的DSPTMS320F2812作為主控芯片，包括主程序，控制策略子程序、SVPWM子程序及其他各種中斷服務(wù)程序等。實(shí)驗(yàn)結(jié)果也驗(yàn)證了混合非線性控制的有效性。
[Abstract]:In recent years, power electronics and power transformation industry strongly advocate "green transformation" of power, traditional rectifier circuit brings a lot of harmonic and reactive power pollution to the power network, which is not in line with the development direction of the industry. The three-phase PWM rectifier has the advantages of sinusoidal input, low current harmonics on the grid side, unit power factor operation, bidirectional energy flow, and DC voltage controllable, which can fundamentally solve the problems of harmonic and reactive power pollution caused by rectifier. Therefore, it has been widely used in the field of industrial application. The main contents of this paper are as follows: firstly, the topology of the three-phase PWM rectifier system is analyzed and its mathematical model in three common coordinate systems is established. In order to eliminate the coupling term 蠅 L of DQ axis in two-phase rotating DQ coordinate system, the current feedforward decoupling control process using Pi regulator is analyzed. In view of the complex process of current feedforward decoupling Pi parameter tuning, the internal model control is applied to decoupling the system. The design process is simple, the parameter debugging is convenient, and the decoupling process does not depend on the precise system parameters and model parameters. The simulation results of Pi current feedforward decoupling and internal mode decoupling in Matlab show that the design of internal mode regulator is not only less dependent on the parameters of PWM rectifier, but also easy to adjust. And it has excellent dynamic response performance of current inner loop. Secondly, in order to improve the voltage outer loop, the sliding mode variable structure theory is applied to the voltage outer loop design of the control system. An internal mode control strategy based on sliding mode variable structure three-phase PWM rectifier is proposed. The sliding mode voltage outer loop tracks the DC output instruction voltage and outputs the inner loop instruction current, and the internal mode control current inner loop. Track the command current and sine the voltage and current on the grid side. Finally, by constructing the control block diagram of current inner loop and voltage outer loop, the simulation model of three-phase PWM rectifier system based on MATLAB / Simulink simulation platform is built. The simulation results show that the system has fast response speed and high tracking accuracy. Strong anti-interference ability and other characteristics. Thirdly, according to the internal mode control principle of sliding mode variable structure three-phase PWM rectifier, an experimental platform of 10kW single PWM rectifier module is built, and the hardware and software of three-phase PWM rectifier system are designed. The control system hardware includes sampling circuit. Driver and protection circuit, soft-start current, zero-crossing phase-locked circuit, etc. The control system software uses DSP TMS320F2812 of TI Company as main control chip, including main program, control strategy subroutine, SVPWM subroutine and other interrupt service programs. Experimental results also verify the effectiveness of hybrid nonlinear control.
【學(xué)位授予單位】：湘潭大學(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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