本文關(guān)鍵詞： LCL濾波 三相VIENNA拓?fù)湔髌?數(shù)字延時 有源阻尼 占空比前饋控制 SVPWM調(diào)制 相位補(bǔ)償 burst-mode控制　出處：《浙江大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：三相VIENNA拓?fù)湔髌魇且环N三電平電路,功率器件承受的電壓低,功率因數(shù)校正效果好。該拓?fù)溟_關(guān)管之間不存在死區(qū)時間,可以工作于高開關(guān)頻率下。因此,三相VIENNA拓?fù)湔髌髑岸藷o源濾波元件小,功率密度高,目前得到了廣泛的應(yīng)用。 本文首先對三相VIENNA拓?fù)湔髌鬟M(jìn)行建模分析。該拓?fù)涓鶕?jù)輸入的連接方式可以分為三相四線制和三相三線制拓?fù)洹Ｇ罢咻斎胫芯�和輸出電容中點相連,三相電路可以單獨控制；后者三相耦合,控制上較為靈活。本文基于三相四線制VIENNA拓?fù)湔髌?前端引入LCL濾波器來進(jìn)一步提高其功率密度。針對LCL濾波器的特點,修正傳統(tǒng)的占空比前饋補(bǔ)償算法。同時,針對不同的電流反饋位置下,控制系統(tǒng)數(shù)字延時對系統(tǒng)穩(wěn)定性的影響進(jìn)行分析研究。提出利用數(shù)字延時,合理設(shè)計LCL參數(shù)使系統(tǒng)穩(wěn)定的方案。其次,本文從奈奎斯特穩(wěn)定性原理出發(fā),提出了一種基于網(wǎng)側(cè)電流反饋補(bǔ)償?shù)男滦陀性醋枘岱椒?其不需要額外增加傳感器,同時控制簡單。通過分析系統(tǒng)有源阻尼的各種可能途徑,據(jù)此提出了兩種電流補(bǔ)償函數(shù)使系統(tǒng)穩(wěn)定工作�；谌嗳�制VIENNA拓?fù)湔髌?本文分析研究空間矢量調(diào)制模式,給出各個矢量的合成和作用時間。同時基于輸入電流換扇區(qū)尖刺的問題,提出利用相位補(bǔ)償控制,減小采樣鎖相誤差造成的換向載波比較的邏輯錯誤。最后,針對VIENNA拓?fù)淠芰繂蜗嗔鲃拥奶攸c,研究了其在輕載和空載下的工作特點,提出利用burst-mode控制算法保證輸出電壓穩(wěn)定。 本文對提出的算法和控制方案進(jìn)行了仿真和實驗。仿真基于MATLAB的S-Function模塊�；谠撃K可以利用C語言編程的特點,模擬實際數(shù)字控制系統(tǒng),減小仿真誤差。最后,本文通過DSP控制實驗,對各個算法進(jìn)行一一的驗證和實現(xiàn)。
[Abstract]:The three-phase VIENNA topology rectifier is a three-level circuit with low voltage and good power factor correction effect. There is no dead time between the topology switches. It can work at high switching frequency. Therefore, the three-phase VIENNA topology rectifier front-end passive filter components are small, high power density, has been widely used. The topology of three-phase VIENNA rectifier can be divided into three-phase four-wire topology and three-phase three-wire topology according to the connection mode of input. The former has input midline and output capacitance midpoint phase. Company. The three-phase circuit can be controlled separately. Based on three-phase four-wire VIENNA topology rectifier, the front-end introduces LCL filter to further improve its power density. According to the characteristics of LCL filter. The traditional duty cycle feedforward compensation algorithm is modified. At the same time, the influence of digital delay on the stability of the control system is analyzed and studied under different current feedback positions, and the use of digital delay is proposed. Reasonable design of LCL parameters to make the system stable. Secondly, based on Nyquist stability principle, a novel active damping method based on network-side current feedback compensation is proposed. It does not need additional sensors, while the control is simple. By analyzing the various possible ways of active damping of the system. Based on the three-phase three-wire VIENNA topology rectifier, this paper analyzes and studies the space vector modulation mode. At the same time, the phase compensation control is used to reduce the logic error of commutative carrier comparison caused by the sampling phase lock error. According to the characteristics of single phase flow of VIENNA topology energy, the working characteristics of VIENNA under light load and no load are studied, and the burst-mode control algorithm is proposed to ensure the output voltage stability. In this paper, the proposed algorithm and control scheme is simulated and experimented. The S-Function module based on MATLAB is simulated. Based on this module, C language can be used to program. The simulation error is reduced by simulating the actual digital control system. Finally, through the DSP control experiment, each algorithm is verified and implemented one by one.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM461

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本文編號：1489618