【摘要】：通過(guò)分析雙向全橋DC-DC變換器采用單移相和雙重移相控制的工作原理,推導(dǎo)出了兩種控制方式下變換器電感電流應(yīng)力與傳輸功率、輸入與輸出電壓調(diào)節(jié)比及移相角比之間的數(shù)學(xué)關(guān)系。為了有效降低變換器電流應(yīng)力,針對(duì)不同的傳輸功率及電壓調(diào)節(jié)比,通過(guò)尋優(yōu)求得使電感電流應(yīng)力達(dá)到最小的最優(yōu)移相角。據(jù)此提出一種雙向全橋DC-DC變換器雙重移相優(yōu)化控制策略,在實(shí)現(xiàn)輸出電壓閉環(huán)控制的同時(shí)使變換器電流應(yīng)力達(dá)到最小。采用該優(yōu)化控制策略,雙重移相控制的電流應(yīng)力始終小于單移相控制,并且當(dāng)變換器工作在輕載且電壓調(diào)節(jié)比較大時(shí),該優(yōu)化控制策略的優(yōu)勢(shì)更加突出。搭建了實(shí)驗(yàn)樣機(jī),對(duì)理論分析進(jìn)行了驗(yàn)證,并與傳統(tǒng)單移相控制進(jìn)行了對(duì)比。實(shí)驗(yàn)結(jié)果驗(yàn)證了所提出最優(yōu)控制策略的有效性與可行性。
[Abstract]:Based on the analysis of the principle of single phase shift and double phase shift control in bi-directional full-bridge DC-DC converter, the inductance current stress and transmission power of the converter under two control modes are deduced. Mathematical relationship between input and output voltage adjustment ratio and phase shift angle ratio. In order to effectively reduce the current stress of the converter, the optimal phase shifting angle is obtained by optimizing the inductor current stress according to the different transmission power and voltage adjustment ratio. Based on this, a dual phase shift optimal control strategy for bi-directional full-bridge DC-DC converter is proposed, which realizes the closed-loop control of output voltage and minimizes the current stress of the converter. With this optimal control strategy, the current stress of dual phase shift control is always less than that of single phase shift control, and the advantages of the optimal control strategy are more prominent when the converter operates under light load and the voltage regulation is large. The experimental prototype is built and the theoretical analysis is verified and compared with the traditional single phase shift control. Experimental results demonstrate the effectiveness and feasibility of the proposed optimal control strategy.
【作者單位】： 山東大學(xué)電網(wǎng)智能化調(diào)度與控制教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51177095、51541708)
【分類號(hào)】：TM46

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