一種基于反并聯(lián)晶閘管全橋子模塊的新型電容換相換流器
[Abstract]:In order to improve the fault characteristics of capacitor converter (capacitor commutated converter,CCC), a new capacitor converter topology (enhanced capacitor commutated converter,ECCC based on reverse parallel thyristor full bridge module is proposed. ECCC replaces the fixed capacitance between converter valve and converter transformer with reverse parallel thyristor full bridge module from the point of view of improving capacitance voltage controllability. The coordinated control strategy between the sub-module thyristor and the valve arm thyristor is designed, and the voltage and current stress of the sub-module thyristor is analyzed. The voltage and current stress of ECCC submodule, the ability to resist commutation failure and the recovery ability after commutation failure are simulated in PSCAD/EMTDC environment. The results show that ECCC can effectively reduce the probability of commutation failure, at the same time, because of its flexible control ability to capacitor voltage, it can effectively avoid the problem that CCC converter loses self-recovery ability after commutation failure, and has the ability of fast fault recovery, and the voltage and current stress of the sub-module is in a reasonable range.
【作者單位】: 新能源電力系統(tǒng)國家重點(diǎn)實(shí)驗(yàn)室(華北電力大學(xué));
【基金】:國家自然科學(xué)基金項(xiàng)目(51507060) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助項(xiàng)目(20130036120006)~~
【分類號(hào)】:TM721.1;TM46
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