Given the time complexity of irregular triangular mesh generation to draw voltage contour is O(n2)

the splitting and merging algorithm combined with triangular mesh generation is proposed to construct Delaunay triangular mesh according to the features of low coupling and high cohesion of power system operation. The nodes are divided into multi-subregional grids by their area attributes

with the merging process described in detail. A voltage contour component is realized by using JavaScript to reduce the duplication of development and make the integration convenient. Examples demonstrate the practicality of the proposed method.