中文摘要：

较详细地阐述了一种模块化UPS并联系统的数字均流控制技术，给出了并联系统的结构，通过对并联系统环流、功率调节特性、并联系统数字功率检测技术分析，得到一种新型的功率检测方法。通过对并联系统的瞬时平均电流和各个逆变模块的输出电流检测，并对这两个电流进行分解，以电流的分解量进行反馈调节控制输出电压幅值和相位，以实现模块化UPS并联系统的均流控制，实验结果证明了该控制技术的有效性。

英文摘要：

A digital current sharing control technique for modularized UPS paralleling operation was describel in detail, presented the structure of paralleled system, and by analyzing circulating current of paralleled system, characteristic of the power regulation, a novel digital power detection technique was deduced. With meas- ured and analyzed the transient average current of paralleled system and output current of each module, both of current components are used to control and regulate the amplitude and the phase of the output voltage. In this way, the control of current sharing in the modularization UPS paralleling system is realized. At last, the results of the experiment prove the effectivity of the technique.