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  本文關鍵詞： PFC 單周期控制 次諧波 控制策略　出處：《電工技術學報》2014年06期 　論文類型：期刊論文

【摘要】：三相PFC變換器的單周期控制因其控制簡單,無需乘法器及采樣輸入電壓受到廣泛研究。傳統(tǒng)單周期控制策略中,變換器輸入電感電流采樣直接作為調(diào)制信號與載波交割產(chǎn)生PWM信號,因此傳統(tǒng)單周期控制策略中的PWM信號可視為通過SPWM方式所獲得。在這種調(diào)制方法下,三相PFC變換器輸出電壓較高,直流母線電壓利用率較低,不利于降低開關管耐壓等級和提高系統(tǒng)效率。本文在分析3P4W系統(tǒng)中的三相四橋臂整流拓撲傳統(tǒng)單周期控制策略基礎上,提出變革傳統(tǒng)單周期控制策略中的調(diào)制波波形,將3次諧波注入PWM調(diào)制(SAPWM)引入到單周期控制策略中。通過SAPWM調(diào)制可降低單周期控制的三相PFC變換器輸出電壓,提高直流母線電壓利用率,進而有利于提高系統(tǒng)效率。改進的單周期控制策略同時可以推廣到3P3W系統(tǒng)中的三相三橋臂整流、三相維也納整流電路。系統(tǒng)仿真與實驗驗證了理論分析的正確性。
[Abstract]:The single-cycle control of three-phase PFC converter is widely studied because of its simple control, no multiplier and sampling input voltage. The input inductor current sampling of the converter produces the PWM signal directly as the modulation signal intersects with the carrier, so the PWM signal in the traditional single-period control strategy can be regarded as obtained by the SPWM mode. The output voltage of three-phase PFC converter is high and the utilization ratio of DC bus voltage is low, which is not conducive to reducing the voltage grade of switching tube and improving the system efficiency. This paper analyzes the traditional single-period control strategy of three-phase four-leg rectifier topology in 3P4W system. In this paper, the modulation waveform of traditional single-period control strategy is changed, and the third-order harmonic injection of PWM modulation is introduced into the single-period control strategy. The output voltage of single-cycle three-phase PFC converter can be reduced by SAPWM modulation. The improved single-cycle control strategy can also be extended to the three-phase three-leg rectifier in 3P3W system. Three-phase Vienna rectifier circuit. System simulation and experiment verify the correctness of the theoretical analysis.
【作者單位】： 南京航空航天大學自動化學院;
【基金】：光寶電力電子技術科研基金 江蘇省高校學科建設工程項目 中央高�；究蒲袠I(yè)務費專項基金(2012202)資助項目
【分類號】：TM461

【參考文獻】

相關期刊論文 前10條

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本文編號：1510769