Abstract
The distribution system is located at the end of the power system and plays an important part of the power system. When a single-phase line break fault occurs in the distribution network, it will not be able to provide reliable three-phase power to the load, which will cause unnecessary economic losses. Aiming at the single-phase line break fault in the field of low-voltage three-phase distribution system, a combined transformer is proposed to convert two-phase power into three-phase power. This combined transformer can solve the power supply problem when a single-phase line break fault occurs in the three-phase power distribution system. At the same time, the principle of power transmission from the two-phase side to the three-phase side of the transformer is analyzed and the simulation results verify that the transformer can successfully achieve two-phase to three-phase power transmission. In the end, the different wiring methods of the combined transformer when line break faults occur in different phases are analyzed. By controlling the switching device to automatically adjust the wiring of the transformer inlet end, adaptive control is realized.
Published Version
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