發(fā)布時間：2018-01-21 16:37

  本文關(guān)鍵詞： 雙有源橋DC-DC變換器 損耗模型 高頻隔離變壓器 電壓轉(zhuǎn)換比 效率優(yōu)化　出處：《電工技術(shù)學(xué)報(bào)》2017年14期 　論文類型：期刊論文

【摘要】：對雙有源橋DC-DC變換器(DAB)系統(tǒng)中的各部分損耗進(jìn)行建模,并依據(jù)此模型,以提升效率為目標(biāo),對DAB系統(tǒng)進(jìn)行優(yōu)化設(shè)計(jì)。首先,介紹單移相調(diào)制策略下的DAB工作原理,并推導(dǎo)漏電感電流有效值的解析表達(dá)式。為突出DAB的電流波形特征,引入電壓轉(zhuǎn)換比的概念,這一概念與變壓器匝比相關(guān)。然后,介紹損耗建模方法。DAB系統(tǒng)的損耗主要分為兩部分,一部分源于半導(dǎo)體器件;另一部分源于高頻隔離變壓器及電感。兩者的損耗數(shù)值不僅由本身的材料特性決定,同時與運(yùn)行工況緊密相關(guān),如傳輸功率、電壓、電流等。將單移相調(diào)制下的DAB電流、電壓波形特征,與器件和變壓器的本身特性結(jié)合考慮,解析建立DAB的穩(wěn)態(tài)損耗模型。并在此基礎(chǔ)上,通過數(shù)值計(jì)算的方法,對電壓轉(zhuǎn)換比進(jìn)行優(yōu)化設(shè)計(jì),同時優(yōu)化移相比的選擇,增強(qiáng)軟硬件的適配性,提升DAB的整體效率。最后,通過實(shí)驗(yàn)對所建損耗模型及優(yōu)化方法進(jìn)行了驗(yàn)證。
[Abstract]:The loss of each part of the dual-active bridge DC-DC converter system is modeled. According to this model, the optimization design of the DAB system is carried out in order to improve the efficiency. This paper introduces the working principle of DAB under single phase shift modulation, and deduces the analytical expression of the effective value of leakage inductive current. In order to highlight the characteristics of DAB current waveform, the concept of voltage conversion ratio is introduced. This concept is related to transformer turn ratio. Secondly, the loss modeling method of DAB system is introduced. The loss of DAB system is mainly divided into two parts, one part is from semiconductor devices; The other part is from the high frequency isolation transformer and inductor. The loss value of the transformer and inductor is not only determined by their own material characteristics, but also closely related to the operating conditions, such as transmission power, voltage. The characteristics of DAB current and voltage waveform under single phase shift modulation are combined with the characteristics of devices and transformers to establish the steady-state loss model of DAB analytically. Through the method of numerical calculation, the voltage conversion ratio is optimized and the choice of shift ratio is optimized to enhance the adaptability of software and hardware, and to improve the overall efficiency of DAB. The loss model and optimization method are verified by experiments.
【作者單位】： 清華大學(xué)電機(jī)系電力系統(tǒng)及發(fā)電設(shè)備安全控制和仿真國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金重大項(xiàng)目資助(51490680,51490683)
【分類號】：TM46
【正文快照】： 0引言隨著環(huán)境的日益惡化,能源危機(jī)問題日漸突出,如何實(shí)現(xiàn)能源互聯(lián)與高效節(jié)能是電力領(lǐng)域面臨的新目標(biāo)和挑戰(zhàn)[1,2]。電能路由器是一種具有前瞻性的選擇方案。而雙有源橋(Dual Active Bridge,DAB)DC-DC變換器(后文簡稱DAB)作為電能路由器中的關(guān)鍵組成部分,不僅要承擔(dān)電能路由器

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本文編號：1452006