Optimal Planning Method for Power System Line Impedance Based on a Comprehensive Stability Margin

With the increasing scale of power systems and large-scale application new energy technologies, planning construction future grids stable operation face severe challenges. Among them, transient stability short-circuit current are two key factors that determine safe a system. However, in traditional power-grid planning, there is little research on strategy coordinating solution between stability, problems forecasts. Based perspective this study proposes method for optimal system’s comprehensive margin uses external penalty function method. The coupling relationship developed through system impedance line optimization problem based formulated as multiobjective model. Finally, determined by simulation results an IEEE 10-generator 39-bus verify effectiveness proposed method, with planned yields best margin. Further verification conducted real grid China, article exhibits good economy scalability. It provides theoretical basis grid, which conducive to grid.