本發(fa)明屬于電(dian)力電(dian)子(zi)，特別是一種單(dan)移(yi)相(xiang)控制(zhi)(zhi)(zhi)下的dab變換器磁偏抑制(zhi)(zhi)(zhi)數字控制(zhi)(zhi)(zhi)調制(zhi)(zhi)(zhi)方法。

背景技術：

1、隨(sui)著電力電子的(de)高速發展，dc-dc變換器(qi)廣(guang)泛(fan)應(ying)用于(yu)各種電力場合(he)，其中(zhong)由(you)于(yu)雙有源橋(dual?active?bridge，dab)變換器(qi)具有寬電壓增益調節，寬軟(ruan)開關(guan)區(qu)域(yu)(yu)，靈活的(de)控制能(neng)力等優點(dian)，被(bei)廣(guang)泛(fan)應(ying)用于(yu)電動汽(qi)車、直流微網、數據中(zhong)心等領域(yu)(yu)，是未來(lai)智慧能(neng)源系(xi)統中(zhong)核(he)心功率變換單元。

2、磁(ci)(ci)偏現象(xiang)，即(ji)在dab的(de)實(shi)際運行中，在電(dian)感及變(bian)壓器(qi)(qi)上產生(sheng)直流偏置電(dian)流，造(zao)成磁(ci)(ci)芯磁(ci)(ci)化偏置。穩態磁(ci)(ci)偏的(de)產生(sheng)原(yuan)因，主(zhu)(zhu)要是全橋電(dian)路結(jie)構參(can)數不(bu)對(dui)稱或者驅(qu)動信(xin)號不(bu)對(dui)稱，穩態磁(ci)(ci)偏會使開關管丟失(shi)軟開關特(te)性，增(zeng)加開關損耗(hao)和導通損耗(hao)。瞬(shun)態磁(ci)(ci)偏主(zhu)(zhu)要發生(sheng)在電(dian)路啟(qi)動階段或者是切載時(shi)(shi)，由于控制dab功率傳(chuan)輸(shu)的(de)移相(xiang)比d(副邊(bian)橋臂q1與原(yuan)邊(bian)橋臂s1的(de)觸發時(shi)(shi)間(jian)差值(zhi)與半周期(qi)的(de)比值(zhi))發生(sheng)突(tu)變(bian)，而產生(sheng)一個巨大的(de)電(dian)流尖峰(feng)，瞬(shun)態磁(ci)(ci)偏可能會造(zao)成變(bian)壓器(qi)(qi)和電(dian)感磁(ci)(ci)芯飽和，毀(hui)壞電(dian)路。

3、常見(jian)的(de)(de)(de)磁偏(pian)(pian)抑制的(de)(de)(de)方(fang)(fang)法(fa)(fa)主(zhu)要有，在(zai)輔助電(dian)(dian)(dian)(dian)感上(shang)串聯一個隔直電(dian)(dian)(dian)(dian)容，阻隔電(dian)(dian)(dian)(dian)感上(shang)的(de)(de)(de)直流(liu)偏(pian)(pian)置電(dian)(dian)(dian)(dian)流(liu)來(lai)消(xiao)除磁偏(pian)(pian)，為防(fang)止lc諧振影(ying)響(xiang)電(dian)(dian)(dian)(dian)路正常工(gong)作，應設置其諧振頻率(lv)遠(yuan)離(li)開關(guan)頻率(lv)。這種方(fang)(fang)法(fa)(fa)可(ke)能(neng)(neng)會降(jiang)低(di)電(dian)(dian)(dian)(dian)路的(de)(de)(de)功(gong)率(lv)密度，且不適合(he)大功(gong)率(lv)高壓(ya)(ya)場合(he)。另一種常見(jian)的(de)(de)(de)通過控制來(lai)消(xiao)除瞬(shun)態(tai)磁偏(pian)(pian)的(de)(de)(de)方(fang)(fang)法(fa)(fa)是(shi)，在(zai)切(qie)載后(hou)的(de)(de)(de)一個周期內，改(gai)變上(shang)下(xia)(xia)橋臂開關(guan)管的(de)(de)(de)占空比(原本為各占50％)來(lai)調整原副(fu)邊電(dian)(dian)(dian)(dian)壓(ya)(ya)控制時間，由此改(gai)變電(dian)(dian)(dian)(dian)感電(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)上(shang)升(sheng)幅(fu)度，使得(de)該周期電(dian)(dian)(dian)(dian)感峰值電(dian)(dian)(dian)(dian)流(liu)達到新穩態(tai)下(xia)(xia)的(de)(de)(de)電(dian)(dian)(dian)(dian)感峰值電(dian)(dian)(dian)(dian)流(liu)值，完成向新穩態(tai)的(de)(de)(de)過渡，從而(er)消(xiao)除磁偏(pian)(pian)，避免產生一個很(hen)大的(de)(de)(de)峰值電(dian)(dian)(dian)(dian)流(liu)和直流(liu)偏(pian)(pian)置電(dian)(dian)(dian)(dian)流(liu)。但是(shi)這種方(fang)(fang)法(fa)(fa)，降(jiang)低(di)了切(qie)載周期的(de)(de)(de)電(dian)(dian)(dian)(dian)感電(dian)(dian)(dian)(dian)流(liu)平均值，減小了傳輸功(gong)率(lv)，會對系統瞬(shun)態(tai)性能(neng)(neng)產生影(ying)響(xiang)。

技術實現思路

1、本發明所要解決的(de)(de)技術(shu)問題是，克(ke)服現有技術(shu)中的(de)(de)不足，提供種(zhong)一種(zhong)單移相控制(zhi)下的(de)(de)dab變(bian)換器磁(ci)偏(pian)抑制(zhi)數字控制(zhi)調制(zhi)方(fang)法(fa)，在(zai)不影響瞬態(tai)過程電(dian)(dian)感傳輸功率的(de)(de)同時，減小切載時電(dian)(dian)感直(zhi)流偏(pian)置電(dian)(dian)流，抑制(zhi)磁(ci)偏(pian)。

2、為解決(jue)上(shang)述(shu)技(ji)術問題，本(ben)發明(ming)提(ti)供的解決(jue)方案為：

3、一種(zhong)單移(yi)相控(kong)制(zhi)(zhi)(zhi)(zhi)下的(de)(de)dab變換(huan)器(qi)磁偏抑制(zhi)(zhi)(zhi)(zhi)數字(zi)控(kong)制(zhi)(zhi)(zhi)(zhi)調(diao)(diao)制(zhi)(zhi)(zhi)(zhi)方法，應用于包(bao)括(kuo)使用數字(zi)控(kong)制(zhi)(zhi)(zhi)(zhi)器(qi)作為(wei)(wei)核心控(kong)制(zhi)(zhi)(zhi)(zhi)器(qi)的(de)(de)dab變換(huan)器(qi)，所述dab變換(huan)器(qi)由(you)兩(liang)個(ge)對稱(cheng)h橋(qiao)(qiao)(qiao)通過(guo)磁網(wang)絡連接在一起，其(qi)中vin為(wei)(wei)輸(shu)入(ru)側(ce)直流(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)源，vo為(wei)(wei)輸(shu)出(chu)(chu)側(ce)直流(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)源，s1-s4開(kai)關(guan)管(guan)(guan)構(gou)成原邊全(quan)橋(qiao)(qiao)(qiao)h1，q1-q4開(kai)關(guan)管(guan)(guan)構(gou)成副邊全(quan)橋(qiao)(qiao)(qiao)h2，變壓(ya)(ya)(ya)(ya)器(qi)和(he)輔助(zhu)電(dian)(dian)(dian)(dian)感(gan)(gan)l構(gou)成磁網(wang)絡，變壓(ya)(ya)(ya)(ya)器(qi)變比為(wei)(wei)n:1，il和(he)vl分別為(wei)(wei)等效電(dian)(dian)(dian)(dian)感(gan)(gan)的(de)(de)電(dian)(dian)(dian)(dian)流(liu)和(he)端(duan)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，vp是原邊全(quan)橋(qiao)(qiao)(qiao)h1兩(liang)橋(qiao)(qiao)(qiao)臂中點電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，vs是副邊全(quan)橋(qiao)(qiao)(qiao)h2兩(liang)橋(qiao)(qiao)(qiao)臂中點電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，采(cai)樣(yang)輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)vo與參(can)考(kao)(kao)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)vref比較(jiao)(jiao)后進入(ru)控(kong)制(zhi)(zhi)(zhi)(zhi)回路，數字(zi)控(kong)制(zhi)(zhi)(zhi)(zhi)器(qi)輸(shu)出(chu)(chu)原副邊開(kai)關(guan)管(guan)(guan)控(kong)制(zhi)(zhi)(zhi)(zhi)信號，包(bao)括(kuo)對輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)控(kong)制(zhi)(zhi)(zhi)(zhi)和(he)對驅(qu)動信號調(diao)(diao)制(zhi)(zhi)(zhi)(zhi)方式(shi)的(de)(de)控(kong)制(zhi)(zhi)(zhi)(zhi)，在對輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)控(kong)制(zhi)(zhi)(zhi)(zhi)過(guo)程中，通過(guo)反饋回路控(kong)制(zhi)(zhi)(zhi)(zhi)，使其(qi)滿足(zu)參(can)考(kao)(kao)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)vref要(yao)求，即(ji)達到控(kong)制(zhi)(zhi)(zhi)(zhi)輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)等于參(can)考(kao)(kao)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，根據當前采(cai)樣(yang)的(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)和(he)參(can)考(kao)(kao)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)參(can)考(kao)(kao)值(zhi)進行比較(jiao)(jiao)，來(lai)生成較(jiao)(jiao)大或者較(jiao)(jiao)小的(de)(de)移(yi)相比d，再根據當前的(de)(de)輸(shu)入(ru)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)vin，輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)vo，即(ji)將裝載的(de)(de)移(yi)相比d，確(que)定電(dian)(dian)(dian)(dian)感(gan)(gan)電(dian)(dian)(dian)(dian)流(liu)所處的(de)(de)狀態，并在數字(zi)控(kong)制(zhi)(zhi)(zhi)(zhi)器(qi)中選(xuan)擇相應的(de)(de)調(diao)(diao)制(zhi)(zhi)(zhi)(zhi)方式(shi)，來(lai)抑制(zhi)(zhi)(zhi)(zhi)dab變換(huan)器(qi)電(dian)(dian)(dian)(dian)感(gan)(gan)直流(liu)偏置(zhi)電(dian)(dian)(dian)(dian)流(liu)。

4、一種可(ke)能的實施方式中，所述對輸(shu)出電壓的控(kong)制過(guo)程具體包括以(yi)下步驟：

5、在對dab變換器原(yuan)邊開關(guan)(guan)管(guan)s1-s4，副邊開關(guan)(guan)管(guan)q1～q4給出驅動信(xin)號之前，數(shu)字控制器以與開關(guan)(guan)管(guan)s1-s4，q1-q4開關(guan)(guan)頻率相同的(de)采(cai)樣(yang)頻率對輸出電壓vo采(cai)樣(yang)，得到當前輸出電壓的(de)數(shu)字量(liang)；

6、數字控制器對輸(shu)出電壓(ya)的(de)數字量與(yu)預期(qi)的(de)參考電壓(ya)vref相減(jian)，得(de)到誤差(cha)量；

7、數字控制(zhi)器根據得到的(de)(de)誤(wu)差(cha)量(liang)，設定(ding)合適的(de)(de)比例積(ji)分pi參數進行(xing)補償(chang)，得到pi電(dian)壓環的(de)(de)控制(zhi)輸出，即即將裝載的(de)(de)移相(xiang)比d。

8、一種可能的實施(shi)方式(shi)中(zhong)，在對驅動(dong)信號調(diao)制(zhi)方式(shi)的控制(zhi)中(zhong)，包括以下步驟(zou)：

9、經(jing)過pi補(bu)償(chang)，得到即將裝載的移相比(bi)d后，根(gen)據狀態判別式q＝f1*d-f2+f2*d，其中(zhong)f1，f2為電感電流斜(xie)率，表(biao)達(da)式為判斷(duan)dab變換器當前所處狀態；

10、根據(ju)所處狀態，數字控制器求出當前開關(guan)周期內開關(guan)管s1-s4，q1-q4的導通時間分配；

11、數字控(kong)(kong)制(zhi)器根據計算表達式，對每一組(zu)對管s1和(he)s4、s2和(he)s3、q1和(he)q4、q2和(he)q3進行控(kong)(kong)制(zhi)，輸出驅動信號(hao)。

12、一種可(ke)能的實(shi)施(shi)方式中，根據電感(gan)電流(liu)將dab變換器(qi)當前所處狀(zhuang)態區分為兩(liang)種狀(zhuang)態：boosting?mode和bucking?mode。

13、一種(zhong)可能的實施方(fang)式(shi)中，當判別式(shi)結果為正時(shi)，電(dian)感電(dian)流(liu)處(chu)在bucking?mode，當判別式(shi)結果為負時(shi)，電(dian)感電(dian)流(liu)處(chu)在boosting?mode。

14、一種可能(neng)的(de)實施方式中，在bucking?mode狀態(tai)下，一個(ge)開(kai)(kai)關周期內(nei)(nei)開(kai)(kai)關管的(de)開(kai)(kai)通順(shun)序為：0至t1時(shi)間內(nei)(nei)，s1，s4，q2，q3開(kai)(kai)通；t1至t1+t2時(shi)間內(nei)(nei)，s1，s4，q1，q4開(kai)(kai)通；t1+t2至t+t1時(shi)間內(nei)(nei)，s2，s3，q1，q4開(kai)(kai)通；t+t1至t+t1+t2時(shi)間內(nei)(nei)，s2，s3，q2，q3開(kai)(kai)通；t+t1+t2至2t時(shi)間內(nei)(nei)，s1，s4，q2，q3開(kai)(kai)通；其中，t1、t2、t3的(de)計算，可由(you)下式算得：

15、

16、一種(zhong)可(ke)能的實施方式(shi)中，在(zai)boosting?mode狀態下，一個開關周期內(nei)(nei)(nei)開關管的開通(tong)(tong)順序為：0至t1時間(jian)內(nei)(nei)(nei)，s1，s4，q1，q4開通(tong)(tong)；t1至t1+t2時間(jian)內(nei)(nei)(nei)，s2，s3，q1，q4開通(tong)(tong)；t1+t2至t+t1時間(jian)內(nei)(nei)(nei)，s2，s3，q2，q3開通(tong)(tong)；t+t1至t+t1+t2時間(jian)內(nei)(nei)(nei)，s1，s4，q2，q3開通(tong)(tong)；t+t1+t2至2t時間(jian)內(nei)(nei)(nei)，s1，s4，q1，q4開通(tong)(tong)；其中，t1、t2、t3的計算(suan)(suan)，可(ke)由下式(shi)算(suan)(suan)得：

17、

18、本發(fa)明提出(chu)(chu)(chu)的(de)(de)(de)(de)(de)(de)單移(yi)(yi)相控(kong)制(zhi)(zhi)(zhi)(zhi)下的(de)(de)(de)(de)(de)(de)dab變換(huan)器(qi)磁偏抑(yi)制(zhi)(zhi)(zhi)(zhi)數字(zi)控(kong)制(zhi)(zhi)(zhi)(zhi)調(diao)制(zhi)(zhi)(zhi)(zhi)方(fang)(fang)法(fa)，使用fpga控(kong)制(zhi)(zhi)(zhi)(zhi)器(qi)或(huo)者(zhe)dsp等數字(zi)控(kong)制(zhi)(zhi)(zhi)(zhi)器(qi)作為(wei)核心控(kong)制(zhi)(zhi)(zhi)(zhi)器(qi)，對(dui)(dui)輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)vo進行(xing)數字(zi)控(kong)制(zhi)(zhi)(zhi)(zhi)和(he)對(dui)(dui)驅動(dong)信號調(diao)制(zhi)(zhi)(zhi)(zhi)方(fang)(fang)式進行(xing)優化(hua)。在(zai)對(dui)(dui)輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)控(kong)制(zhi)(zhi)(zhi)(zhi)過(guo)程中，通(tong)過(guo)反饋(kui)回路控(kong)制(zhi)(zhi)(zhi)(zhi)，使其滿(man)足參(can)考(kao)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)vref要求(即達到控(kong)制(zhi)(zhi)(zhi)(zhi)輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)等于參(can)考(kao)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya))，根(gen)據(ju)當前采樣的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)和(he)參(can)考(kao)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)參(can)考(kao)值(zhi)進行(xing)比(bi)較(jiao)，來生(sheng)(sheng)成較(jiao)大(da)或(huo)者(zhe)較(jiao)小的(de)(de)(de)(de)(de)(de)移(yi)(yi)相比(bi)d，再根(gen)據(ju)當前的(de)(de)(de)(de)(de)(de)輸(shu)入電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)vin，輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)vo，即將裝載(zai)(zai)的(de)(de)(de)(de)(de)(de)移(yi)(yi)相比(bi)d，確(que)定電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)所處(chu)的(de)(de)(de)(de)(de)(de)狀(zhuang)態，并在(zai)數字(zi)控(kong)制(zhi)(zhi)(zhi)(zhi)器(qi)中選擇(ze)相應(ying)的(de)(de)(de)(de)(de)(de)調(diao)制(zhi)(zhi)(zhi)(zhi)方(fang)(fang)式，來抑(yi)制(zhi)(zhi)(zhi)(zhi)dab變換(huan)器(qi)電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)直(zhi)流(liu)(liu)(liu)(liu)偏置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)。區分電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)波(bo)(bo)形狀(zhuang)態的(de)(de)(de)(de)(de)(de)調(diao)制(zhi)(zhi)(zhi)(zhi)方(fang)(fang)法(fa)，通(tong)過(guo)pi控(kong)制(zhi)(zhi)(zhi)(zhi)器(qi)輸(shu)出(chu)(chu)(chu)量移(yi)(yi)相比(bi)d、輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)vin、輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)vo，來將電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)波(bo)(bo)形區分為(wei)boosting?mode和(he)buckingmode，然(ran)后選擇(ze)相應(ying)的(de)(de)(de)(de)(de)(de)調(diao)制(zhi)(zhi)(zhi)(zhi)方(fang)(fang)式去控(kong)制(zhi)(zhi)(zhi)(zhi)開(kai)(kai)關管s1-s4，q1～q4的(de)(de)(de)(de)(de)(de)導通(tong)時間分配，能夠(gou)控(kong)制(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)值(zhi)在(zai)每個開(kai)(kai)關周(zhou)(zhou)期(qi)開(kai)(kai)始時和(he)開(kai)(kai)關周(zhou)(zhou)期(qi)結(jie)束時為(wei)0。由于dab其天(tian)(tian)然(ran)的(de)(de)(de)(de)(de)(de)開(kai)(kai)關對(dui)(dui)稱性(天(tian)(tian)然(ran)伏秒平衡特性)，在(zai)此條件下，能使每個開(kai)(kai)關周(zhou)(zhou)期(qi)內(nei)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)均(jun)值(zhi)為(wei)0，并且保(bao)證(zheng)在(zai)切載(zai)(zai)條件下，不會(hui)因為(wei)移(yi)(yi)相比(bi)d的(de)(de)(de)(de)(de)(de)突變而產生(sheng)(sheng)巨(ju)大(da)的(de)(de)(de)(de)(de)(de)直(zhi)流(liu)(liu)(liu)(liu)偏置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)而引發(fa)磁偏。同時，由于在(zai)切載(zai)(zai)周(zhou)(zhou)期(qi)內(nei)依然(ran)保(bao)持(chi)統一(yi)橋臂上下管(s1和(he)s2，s3和(he)s4，q1和(he)q2，q3和(he)q4)各占(zhan)(zhan)50％的(de)(de)(de)(de)(de)(de)占(zhan)(zhan)空比(bi)，并沒有改變電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)(de)(de)(de)波(bo)(bo)形，不會(hui)影(ying)響(xiang)切載(zai)(zai)時的(de)(de)(de)(de)(de)(de)功(gong)率傳輸(shu)，有利于保(bao)持(chi)dab變換(huan)器(qi)的(de)(de)(de)(de)(de)(de)快(kuai)速性。