DEVICE FOR MEASURING UNBALANCED CURRENT OF COMMON-TOWER DOUBLE-CIRCUIT POWER TRANSMISSION LINE

摘要

A device for measuring unbalanced current of a common-tower double-circuit power transmission line. An output end of each phase winding of a first threephase current transformer (1) is correspondingly electrically connected to an input end of a corresponding phase winding of a primary side of a first threephase reactance transformer (3), each output end of a secondary side of the first threephase reactance transformer (3) is electrically connected to a CPU (6) via an analog-to-digital conversion circuit (5), an output end of each phase winding of a second threephase current transformer (2) is correspondingly electrically connected to an input end of a corresponding phase winding of a primary side of a second threephase reactance transformer (4), and each output end of a secondary side of the second threephase reactance transformer (4) is electrically connected together with the CPU (6) via the analog-to-digital conversion circuit (5). The problems of being inconvenient to use and unscientific and unreasonable testing and analysis in the existing measuring device are solved.