Optimal balancing of large single-phase traction load

Traction load results in voltage unbalance. Steinmetz method for balancing traction load has disadvantage required high compensation capacity. This paper presents a model with optimal compensation capacity for balancing traction load. According to the mathematical analytic solution of the optimal model, comparisons between the optimal results and that of Steinmetz method are conducted with MATLAB, which demonstrates the advantages of the optimal design.