公开(公告)号：US20160344233A1

公开(公告)日：2016-11-24

申请号：US15231247

申请日：2016-08-08

Applicant: ABB Schweiz AG

Inventor： Esa-Kai Paatero ,  Juha Lantta

IPC: H02J9/06 ,  H02M7/04 ,  H02M7/44 ,  H02J7/00

CPC classification number: H02J9/061 ,  H02J7/0068 ,  H02M7/04 ,  H02M7/219 ,  H02M7/44 ,  H02M2001/007 ,  Y02B70/1408

Abstract: A uninterruptable power supply system for supplying an electrical DC load with electric energy from an electrical network comprises an active rectifier connectable to the electrical network for rectifying an AC voltage into a DC voltage, a split DC link to be supplied from the active rectifier, the split DC link comprising two capacitors interconnected in series between a positive output and a negative output of the uninterruptable power supply system, wherein a DC link neutral point is provided between the two capacitors, and a balancing buck/boost converter connected in parallel to the split DC link between the positive output and the negative output and connected via an inductor to the DC link neutral point, such that the buck/boost converter is adapted to balance the two capacitors of the DC link, wherein an unbalance between the two capacitors is generated by one or more electrical DC loads connected between the positive output and the negative output, between the positive output and the DC link neutral point and/or between the negative output and the DC link neutral point.

Abstract translation: 用于从电网向电气DC负载提供电能的不间断电源系统包括可连接到电网的有源整流器，用于将AC电压整流为DC电压，从有源整流器提供的分离DC链路， 分离DC链路，包括串联在不间断电源系统的正输出和负输出之间的两个电容器，其中在两个电容器之间提供DC链路中性点，以及并联连接到分离器的平衡降压/升压转换器 直流链路在正输出和负输出之间并通过电感器连接到DC链路中性点，使得降压/升压转换器适于平衡DC链路的两个电容器，其中产生两个电容器之间的不平衡 通过一个或多个连接在正输出和负输出之间的直流负载，在正输出之间 和直流母线中性点和/或负输出与直流母线中性点之间。