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以两台UPS的并联系统为例,分析UPS并联的等效电路以及倚化等效电路,计算出UPS并联系统中环流的表达式,研究供电系统中幅值和相位对环流大小和方向的影响。又在上述分析的基础上进一步提出通过功率分配和调整电压差值两种抑制环流的方法。
Taking the parallel system of two UPSs as an example, the equivalent circuit of parallel UPS and the equivalent circuit of the UPS are analyzed, and the expression of the circulating current in UPS parallel system is analyzed. The influence of amplitude and phase on the size and direction of the circulating current is studied. . Again on the basis of the above analysis further proposed by the power distribution and adjust the voltage difference two ways to curb the current.