“T”型连接结构的 UPS 并联运行方案

A Parallel Operating Scheme of the UPS with"T"-connecting Structure

提出一种"T"型连接结构的 UPS 并联运行方案,该方案中并联运行的 UPS 省去信号联络线,属于主从式 UPS 并联。从"T"型结构 UPS 将前级 UPS 的输出电流引入并以此电流作并联控制信号,采用电流追踪型 PWM 控制信号发生方案,可使其输出电流与前级输入电流保持同相,并可达到均流的目的。文中给出了仿真结果,表明该方案是可行的。

A novel parallel operating scheme of the UPS with'T'-connecting structure is presented,and it belongs to master-slave parallel scheme without liaison line.The slave'T'-connecting structure UPS using the input current of the fore-UPS as its control signal,can make its output current to have the same wave shape as the input current by means of the pursuing current PWM signal generating method,and can get the aim of balancing current.The simulation presented in this paper illustrates tbe feasibility of this scheme.