【摘要】：交流調(diào)速系統(tǒng)的主要供電設(shè)備是電力變換器,而傳統(tǒng)的電力變換器一直無(wú)法克服變換器本身固有的缺陷。由于雙級(jí)矩陣變換器(Two-stage Matrix Converter, TSMC)直流側(cè)無(wú)儲(chǔ)能電容,節(jié)約成本的同時(shí)縮小了裝置體積,性能上可實(shí)現(xiàn)輸入輸出電流正弦、輸入功率因數(shù)可控且能量雙向流動(dòng),是一種非常具有發(fā)展?jié)摿Φ男滦汀熬G色”電力變換器。驅(qū)動(dòng)電機(jī)時(shí)使系統(tǒng)具有優(yōu)良傳動(dòng)性能的同時(shí),更對(duì)電網(wǎng)無(wú)諧波污染。TSMC直流側(cè)無(wú)儲(chǔ)能環(huán)節(jié)這一特點(diǎn)使得整流和逆變兩級(jí)存在相互耦合的問(wèn)題,在驅(qū)動(dòng)電機(jī)系統(tǒng)中,變換器的輸出側(cè)電壓電流關(guān)系到電機(jī)的傳動(dòng)性能,同時(shí)輸入側(cè)電流又關(guān)系到電網(wǎng)電能質(zhì)量。然而傳統(tǒng)的空間矢量調(diào)制策略是一種近似開(kāi)環(huán)控制,無(wú)法消除這種耦合影響,并且很多場(chǎng)合對(duì)電機(jī)控制性能的要求越來(lái)越高,傳統(tǒng)的控制方法已難以滿足高性能的控制需求。針對(duì)上述問(wèn)題,本文提出用預(yù)測(cè)控制實(shí)現(xiàn)TSMC驅(qū)動(dòng)電機(jī)的一體化控制,利用網(wǎng)側(cè)輸入電壓、電流、開(kāi)關(guān)電路輸入側(cè)電壓、TSMC開(kāi)關(guān)矩陣模型和電機(jī)定子電流及轉(zhuǎn)子角速度,建立TSMC驅(qū)動(dòng)電機(jī)系統(tǒng)數(shù)學(xué)模型并離散化,依據(jù)離散數(shù)學(xué)模型建立下一時(shí)刻輸入無(wú)功功率、電機(jī)定子磁鏈和電磁轉(zhuǎn)矩與各自參考值之間誤差的功能函數(shù),以此功能函數(shù)為約束對(duì)TSMC的開(kāi)關(guān)狀態(tài)進(jìn)行尋優(yōu),利用最優(yōu)開(kāi)關(guān)狀態(tài)實(shí)現(xiàn)電機(jī)控制。在確保良好網(wǎng)側(cè)性能的同時(shí),更有效地克服了模型誤差和外部環(huán)境干擾等不確定因素所造成的影響。為了驗(yàn)證文中所提方案的正確性和有效性,在理論研究的基礎(chǔ)上,用仿真和實(shí)驗(yàn)進(jìn)行了方案驗(yàn)證,搭建了以FPGA為控制核心的實(shí)驗(yàn)平臺(tái)并設(shè)計(jì)了系統(tǒng)軟硬件。結(jié)果表明:TSMC驅(qū)動(dòng)電機(jī)預(yù)測(cè)控制實(shí)現(xiàn)了電機(jī)定子磁鏈、電測(cè)轉(zhuǎn)矩分別高精度跟隨其參考值,輸入無(wú)功功率最小的效果,使系統(tǒng)具有優(yōu)良的網(wǎng)側(cè)和傳動(dòng)性能。
[Abstract]:The main power supply equipment of AC speed regulation system is the power converter, but the traditional power converter can not overcome the inherent defects of the converter itself. Because the two-stage matrix converter (Two-stage Matrix Converter, TSMC) has no energy storage capacity at the DC side, the cost is saved and the device volume is reduced. The sinusoidal input and output current, the controllable input power factor and the two-way energy flow can be realized in the performance of the converter. It is a new type of "green" power converter with great potential for development. When driving the motor, the system has excellent transmission performance and no harmonic pollution. TSMC DC side has no energy storage link, which makes the two stages of rectifier and inverter coupled with each other. In the drive motor system, The output voltage and current of the converter are related to the drive performance of the motor and the input current is also related to the power quality of the power grid. However, the traditional space vector modulation strategy is a kind of approximate open-loop control, which can not eliminate the coupling effect, and in many cases, the control performance of the motor is more and more demanding. The traditional control method has been difficult to meet the high performance control requirements. In order to solve the above problems, a predictive control method is proposed to realize the integrated control of the TSMC motor. The input voltage, current, input voltage of the switch circuit and the stator current and rotor angular velocity of the motor are used in this paper. The mathematical model of TSMC drive motor system is established and discretized. According to the discrete mathematical model, the function of input reactive power, the error between stator flux and electromagnetic torque and their reference value is established. The switching state of TSMC is optimized by the function, and the motor control is realized by the optimal switching state. At the same time, it can effectively overcome the influence of uncertainty such as model error and external environment disturbance. In order to verify the correctness and validity of the proposed scheme, based on the theoretical research, the scheme is verified by simulation and experiment. The experimental platform with FPGA as the control core is built and the software and hardware of the system are designed. The results show that the predictive control of the 1: TSMC drive motor realizes the stator flux linkage of the motor, the high precision of electric torque following its reference value, and the minimum input reactive power, which makes the system have excellent network side and transmission performance.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM46

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