Abstract: Three-phase bridge converters（TPBC）are widely used in low-voltage power distribution networks

to compensate the negative-sequence current and the reactive current. Because of the relatively high costs，

improving the compensation effect of limited capacity equipment has high economic value and research significance.The feasible region of negative-sequence compensation current was solved according to equipment capacity constraints，a mathematical model for solving the minimum negative-sequence residual degree was built，and the optimal compensation solution was solved based on the analytic geometry method. Finally，the effectiveness of the optimized comprehensive compensation strategy proposed was verified using Matlab numerical calculation and PSCAD/EMTDC simulation. The simulation results show that the proposed optimized comprehensive compensation strategy effectively improves the compensation effect.

      Key words: negative sequence compensation；three-phase bridge converter（TPBC）；parallel compensator；

analytical geometry