三相電壓型PWM整流器控制系統(tǒng)的研究
發(fā)布時間：2018-12-17 15:31
【摘要】：近幾年來，隨著變流技術(shù)迅速崛起，變流技術(shù)的產(chǎn)品在生活和生產(chǎn)領(lǐng)域中得到廣泛應用，但社會發(fā)展也對變流技術(shù)產(chǎn)品提出了更高的要求，特別是對諧波的抑制和治理要求不斷提高。傳統(tǒng)整流方式采用二極管不控整流，存在能量傳輸功率因數(shù)低、網(wǎng)側(cè)電流畸變大等問題，給電網(wǎng)造成嚴重的影響。電壓型三相半橋式PWM整流器具備單位功率因數(shù)運行、網(wǎng)側(cè)電壓和電流同步且正弦化等優(yōu)點，滿足綠色能源發(fā)展的要求，是學者近幾年研究的熱點。因此本文從如下幾個方面展開研究工作： 首先，簡單介紹電壓型三相半橋式PWM整流器的基本工作原理，結(jié)合工程的實用性確定電壓型三相半橋式整流器拓撲結(jié)構(gòu)，在該拓撲結(jié)構(gòu)的基礎(chǔ)上進行了數(shù)學分析，并建立在旋轉(zhuǎn)同步dq坐標系下的數(shù)學模型。介紹了幾種常見的基于旋轉(zhuǎn)同步dq坐標系數(shù)學模型的控制策略，并對這些控制策略進行了分析和研究。針對電壓型三相半橋式PWM整流器的非線性、強耦合特性和工程設(shè)計難以實現(xiàn)等特點，提出了一種新型雙閉環(huán)控制策略。其中電壓外環(huán)采用滑模變結(jié)構(gòu)控制，實現(xiàn)了直流側(cè)電壓穩(wěn)定且可調(diào)；電流內(nèi)環(huán)采用非線性PI控制和無電感參數(shù)L值前饋解耦相結(jié)合，即非線性PI無電感值L的前饋解耦控制，實現(xiàn)了系統(tǒng)快速跟隨響應，，具有較強的抗干擾能力。并在Matlab/simulink進行了仿真研究，驗證了這種控制方法的可行性和優(yōu)越性。 其次，根據(jù)仿真和工程應用設(shè)計參數(shù)要求，對電壓型三相半橋式PWM整流器的控制系統(tǒng)硬件與程序進行了設(shè)計，硬件設(shè)計主要介紹了主電路中各器件的數(shù)學計算、選型和各電路模塊的設(shè)計等。程序設(shè)計主要介紹系統(tǒng)的主程序、系統(tǒng)子程序和控制策略子程序等；然后介紹了系統(tǒng)調(diào)試和整流器實物平臺，其中系統(tǒng)調(diào)試給出了實驗波形和相應結(jié)論。 最后介紹了整流器系統(tǒng)實物平臺和系統(tǒng)調(diào)試運行的情況，給出了系統(tǒng)調(diào)試實驗波形和相應結(jié)論，驗證了電壓型三相半橋式PWM整流器控制方法的準確性和優(yōu)越性。
[Abstract]:In recent years, with the rapid rise of converter technology, the products of converter technology have been widely used in the field of life and production, but social development has also put forward higher requirements for the products of converter technology. In particular, the suppression of harmonic and management requirements continue to improve. The traditional rectifier adopts diode uncontrolled rectifier, which has some problems such as low power factor of energy transmission and large distortion of current on the grid side, which has a serious effect on the power grid. Voltage source three-phase half-bridge PWM rectifier has the advantages of unit power factor operation, voltage and current synchronization and sinusoidal, which meet the requirements of green energy development. Therefore, the research work of this paper is as follows: firstly, the basic working principle of voltage source three-phase half-bridge PWM rectifier is briefly introduced, and the topology structure of voltage source three-phase half-bridge rectifier is determined according to the practicability of engineering. On the basis of the topology, the mathematical model is established in the rotating synchronous dq coordinate system. Several common control strategies based on rotating synchronous dq coordinate system are introduced, and these control strategies are analyzed and studied. In view of the nonlinear, strong coupling characteristics and the difficulty in engineering design of the voltage source three-phase half-bridge PWM rectifier, a novel double-closed-loop control strategy is proposed. The voltage outer loop is controlled by sliding mode variable structure and the DC voltage is stable and adjustable. The current inner loop adopts the combination of nonlinear PI control and feedforward decoupling without inductance parameter L value, that is, the nonlinear PI feedforward decoupling control without inductance value L, which realizes the fast following response of the system and has strong anti-interference ability. The feasibility and superiority of this control method are verified by simulation research in Matlab/simulink. Secondly, according to the requirements of simulation and engineering application design parameters, the control system hardware and program of voltage source three-phase half-bridge PWM rectifier are designed. The hardware design mainly introduces the mathematical calculation of each device in the main circuit. Type selection and the design of each circuit module. The program design mainly introduces the main program, system subroutine and control strategy subroutine of the system, and then introduces the system debugging and rectifier physical platform, in which the system debugging gives the experimental waveform and corresponding conclusions. Finally, the physical platform of rectifier system and the debugging operation of the system are introduced. The waveform of system debugging experiment and the corresponding conclusions are given. The veracity and superiority of the control method of voltage source three-phase half-bridge PWM rectifier are verified.
【學位授予單位】：湘潭大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM461
本文編號：2384392
[Abstract]:In recent years, with the rapid rise of converter technology, the products of converter technology have been widely used in the field of life and production, but social development has also put forward higher requirements for the products of converter technology. In particular, the suppression of harmonic and management requirements continue to improve. The traditional rectifier adopts diode uncontrolled rectifier, which has some problems such as low power factor of energy transmission and large distortion of current on the grid side, which has a serious effect on the power grid. Voltage source three-phase half-bridge PWM rectifier has the advantages of unit power factor operation, voltage and current synchronization and sinusoidal, which meet the requirements of green energy development. Therefore, the research work of this paper is as follows: firstly, the basic working principle of voltage source three-phase half-bridge PWM rectifier is briefly introduced, and the topology structure of voltage source three-phase half-bridge rectifier is determined according to the practicability of engineering. On the basis of the topology, the mathematical model is established in the rotating synchronous dq coordinate system. Several common control strategies based on rotating synchronous dq coordinate system are introduced, and these control strategies are analyzed and studied. In view of the nonlinear, strong coupling characteristics and the difficulty in engineering design of the voltage source three-phase half-bridge PWM rectifier, a novel double-closed-loop control strategy is proposed. The voltage outer loop is controlled by sliding mode variable structure and the DC voltage is stable and adjustable. The current inner loop adopts the combination of nonlinear PI control and feedforward decoupling without inductance parameter L value, that is, the nonlinear PI feedforward decoupling control without inductance value L, which realizes the fast following response of the system and has strong anti-interference ability. The feasibility and superiority of this control method are verified by simulation research in Matlab/simulink. Secondly, according to the requirements of simulation and engineering application design parameters, the control system hardware and program of voltage source three-phase half-bridge PWM rectifier are designed. The hardware design mainly introduces the mathematical calculation of each device in the main circuit. Type selection and the design of each circuit module. The program design mainly introduces the main program, system subroutine and control strategy subroutine of the system, and then introduces the system debugging and rectifier physical platform, in which the system debugging gives the experimental waveform and corresponding conclusions. Finally, the physical platform of rectifier system and the debugging operation of the system are introduced. The waveform of system debugging experiment and the corresponding conclusions are given. The veracity and superiority of the control method of voltage source three-phase half-bridge PWM rectifier are verified.
【學位授予單位】：湘潭大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM461
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