Transformer-free unified power flow controller based on chopped-control impedors

The invention discloses a transformer-free unified power flow controller based on chopped-control impedors. The controller comprises series chopped-control impedors and parallel chopped-control impedors, and any non-zero series chopped-control impedors and any non-zero parallel chopped-control impedors are freely combined and connected through end parts. The series chopped-control impedors and the parallel chopped-control impedors are controlled through a carrier phase-shifting PWM strategy, each series chopped-control impedor is formed by cascading a plurality of series chopped-control impedors, and each parallel chopped-control impedor is formed by cascading a plurality of parallel chopped-control impedors; through the carrier phase-shifting PWM strategy, the equivalent impedance of the series chopped-control impedors and the parallel chopped-control impedors is controlled, and then the operation state of a power transmission line is regulated and controlled. 本发明公开了一种基于斩控阻抗器的无变压器式统一潮流控制器，包括串联斩控式阻抗器、并联斩控式阻抗器