CAJ | 학술논문

为了提高高功率大电流的相控型晶闸管多脉整流器在不同负载情况下的功率因数，提出了一种新型变拓扑结构的多脉整流器。2个三相晶闸管整流桥分别与二极管并联，通过调整串接在2个二极管之间的开关，使得2个整流桥组成的电路可以在串联或并联模式自由切换。拓扑结构的自由切换使整流器在运行中避免晶闸管触发角趋近90。的深控模式，从而获得功率因数的提高。采用电流峰值预测控制方法实现多个电路模式的并行计算，再依据电路所处的状态选择合理的控制决策。该方法提高了整流器对电流指令的动态响应，更重要的是消除了电路结构切换过程中的电流突变。仿真和实验结果验证了该装置变拓扑结构的瞬态过程快速平稳。与传统的多脉整流器相比，变拓扑结构整流器在轻负载的情况下提高功率因数的效果显著，实验给出了在不同功率负载下功率因数提高的具体实验数据。
위료제고고공솔대전류적상공형정갑관다맥정류기재불동부재정황하적공솔인수，제출료일충신형변탁복결구적다맥정류기。2개삼상정갑관정류교분별여이겁관병련，통과조정천접재2개이겁관지간적개관，사득2개정류교조성적전로가이재천련혹병련모식자유절환。탁복결구적자유절환사정류기재운행중피면정갑관촉발각추근90。적심공모식，종이획득공솔인수적제고。채용전류봉치예측공제방법실현다개전로모식적병행계산，재의거전로소처적상태선택합리적공제결책。해방법제고료정류기대전류지령적동태향응，경중요적시소제료전로결구절환과정중적전류돌변。방진화실험결과험증료해장치변탁복결구적순태과정쾌속평은。여전통적다맥정류기상비，변탁복결구정류기재경부재적정황하제고공솔인수적효과현저，실험급출료재불동공솔부재하공솔인수제고적구체실험수거。
To improve the power factor of thyristor rectifiers which are still popular in high power rates, a novel multi-pulse thyristor rectifier is proposed. Two three-phase thyristor bridges can operate in both parallel and series modes by using an auxiliary circuit with two diodes and a switch. The flexible topology is to avoid the deep angle triggering of the thyristors in light load, thus a higher power factor and lower harmonic contents can be achieved. This novel peak current controller achieves a seamless switching transition during topology changing and a better current tracking capability. Based on the periodical voltage-second integral calculation on DC side inductor, the controller compares the sum of current sampling and the expected rising current caused by voltage-second integral on inductor in real time to trigger the thyristor. Simulations and experiments show the seamless transition during topology switching. Details of power quality improvement under different loads are listed and compared with a traditional 12-pulse converter.