Abstract
Substation locating and sizing is an important component of urban power networks. In this paper, an improved method based on the weighted Voronoi diagram and transportation model for substation planning is proposed, which can optimize the location, capacity, and power supply range for each substation with the minimum investment which contains the cost of the lines, substations, and annual operation expense. The weighted Voronoi diagram (WVD) whose weights can be adaptively adjusted can calculate the location and the capacity for each substation with good performance of global convergence and better convergence speed. Transportation model can simulate the best correspondence relationship between the loads and substations. The impact of geographical factors is also considered in this paper. Large amount of experiments show that the improved method can get more reasonable and more optimized planning result within shorter time than the original WVD and other algorithms.
Highlights
In a primary distribution network planning problem, the determination of total number, size, and location of new distribution substations is among one of the most important tasks of planners who are responsible for supplying the loads securely, keeping the medium voltage level in defined limits and thereby minimizing losses [1].Decision of the optimum location and numbers of new substations to be constructed is challenging in many cases [2,3,4]
Some methods, including the weighted Voronoi diagram, have taken into account the load rate of the transformer, but the total capacity of the substations in the planning result may be much bigger than the plan needs, which led to the increase of the investment
Taking into account the issues above, we proposed two improvements based on the weighted Voronoi diagram (WVD)
Summary
In a primary distribution network planning problem, the determination of total number, size, and location of new distribution substations is among one of the most important tasks of planners who are responsible for supplying the loads securely, keeping the medium voltage level in defined limits and thereby minimizing losses [1]. The problems and main works of this study are introduced first, and the Voronoi diagram, realized on the basis of improved weighting by adding an adaptive control process of load ratio, was used to get a reasonable substation site planning. On this basis, the transportation model was used to calculate the power supply, which could get a reasonable load rate for each substation.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
