發(fā)布時間：2018-01-19 04:00

  本文關(guān)鍵詞： VIENNA整流器 三相數(shù)字鎖相環(huán) 平均電流模式控制 前饋補償　出處：《廣東工業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著電力電子裝置的發(fā)展與廣泛應(yīng)用,電網(wǎng)諧波及無功污染日趨嚴重。為此,高功率因數(shù)和低電流諧波畸變的PWM整流器成為電力電子技術(shù)應(yīng)用中的研究熱點。VIENNA整流器由于具有開關(guān)電壓應(yīng)力小、開關(guān)信號少、可靠性高等特征,在高壓、大功率場合有廣闊應(yīng)用前景。但由于VIENNA整流器工作原理復(fù)雜、控制難度大,目前尚未成熟。因此,對其電網(wǎng)電壓同步控制策略、拓撲控制實現(xiàn)及性能提升的研究具有重要的理論意義及工程價值。 首先,本文分析了VIENNA整流器的工作原理,得出其在三相abc坐標系及dq坐標系下的狀態(tài)空間平均方程,建立了其在不同坐標系下的等效電路模型。 其次,采用了三相DPLL計算電流內(nèi)環(huán)參考指令信號的方法。詳細分析了PLL各組成部分的工作原理。同時,為了避免二次諧波干擾鎖相及縮短程序執(zhí)行時間,探討了一種將陷波濾波器串入三相DPLL和使用數(shù)字正弦振蕩器的改進型DPLL方法。 然后,采用了平均電流模式控制策略實現(xiàn)對VIENNA整流器的控制。重點分析了電流內(nèi)環(huán)環(huán)路的傳遞函數(shù),采用了適當?shù)目刂破鲗Νh(huán)路進行了補償。同時,為了提高功率因數(shù)、降低電流諧波畸變率,在電流內(nèi)環(huán)控制中引入了前饋補償?shù)母倪M型平均電流模式控制策略。 最后,對VIENNA整流器的硬件電路及軟件系統(tǒng)進行了設(shè)計。詳細闡述了VIENNA主電路參數(shù)計算及器件選型、控制電路設(shè)計、DSP寄存器配置及PID函數(shù)。以TMS320F28035為控制核心,構(gòu)建了一臺10kW的VIENNA整流器樣機。分別對傳統(tǒng)平均電流模式控制策略及改進型平均電流模式控制策略進行了實驗測試。實驗結(jié)果顯示,改進型平均電流模式控制策略比傳統(tǒng)的平均電流模式控制策略具有更為優(yōu)越的控制性能。
[Abstract]:With the development and wide application of power electronic devices, harmonic and reactive power pollution are becoming more and more serious. The PWM rectifier with high power factor and low current harmonic distortion has become a research hotspot in power electronics technology. Because of its low switching voltage stress, the VIENNA rectifier has less switching signals. High reliability features, in high-voltage, high-power occasions have a broad application prospects. But because of the complex working principle of VIENNA rectifier, the control is very difficult, so it is not mature at present. The research of voltage synchronization control strategy, topology control and performance improvement is of great theoretical significance and engineering value. Firstly, the working principle of VIENNA rectifier is analyzed, and the average equation of state space in three-phase abc coordinate system and dq coordinate system is obtained. The equivalent circuit model in different coordinate systems is established. Secondly, the method of three-phase DPLL is used to calculate the reference instruction signal of current inner loop. The working principle of each component of PLL is analyzed in detail. At the same time. In order to avoid the second harmonic interference and shorten the execution time of the program, an improved DPLL method by which the notch filter is inserted into the three-phase DPLL and the digital sinusoidal oscillator is used is discussed. Then, the average current mode control strategy is used to control the VIENNA rectifier, and the transfer function of the current inner loop is analyzed. An appropriate controller is used to compensate the loop. At the same time, in order to improve the power factor and reduce the current harmonic distortion rate. An improved average current mode control strategy based on feedforward compensation is introduced in the current inner loop control. Finally, the hardware circuit and software system of VIENNA rectifier are designed. The parameter calculation and device selection of VIENNA main circuit and the design of control circuit are described in detail. DSP register configuration and PID function. Take TMS320F28035 as the control core. A 10kW prototype of VIENNA rectifier is constructed. The traditional average current mode control strategy and the improved average current mode control strategy are tested. The improved average current mode control strategy has better control performance than the traditional average current mode control strategy.
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM461

【引證文獻】

相關(guān)期刊論文 前1條

1 王倩;同向前;張皓;黨超亮;;基于準比例諧振的VIENNA整流器中點電位平衡策略[J];電氣傳動;2016年06期

相關(guān)碩士學(xué)位論文 前2條

1 丁凱;基于DSP的三電平PWM整流器的控制策略研究[D];東南大學(xué);2015年

2 趙齊齊;應(yīng)用于電動汽車充電機的高功率密度三相VIENNA整流器研究[D];揚州大學(xué);2015年

，

本文編號：1442509