Substation Planning Method for Active Distribution Network Based on Improved Weighted Voronoi Diagram

Abstract

The invention discloses an improved weighted Voronoi diagram-based active power distribution network substation planning method. The credible capacity of distributed power is assessed on the basis of considering load characteristics, and particularly, under the condition of keeping the reliability level of a system unchanged, the capacity, for improving the load supply capability of the system under any load characteristic, of the distributed power is calculated; a substation optimization planning model considering the credible capacity of the distributed power is built; an improved weighted Voronoi diagram-based planning method is proposed and comprises hierarchy improvement on a weighted Voronoi diagram and directivity improvement on the weighted Voronoi diagram; and an active power distribution network substation optimization planning process is proposed. According to the method, the credible capacity of the distributed power is assessed more accurately; the speed of dividing a power supply range of a substation by a weighted Voronoi diagram algorithm is increased; the power network investment can be effectively reduced or delayed; and the active power distribution network substation planning can coordinate relationships between supply loads of the distributed power and new substation locating and sizing, thereby realizing integrated optimization of power supply reliability and economy.

Description

technical field [0001] The invention relates to a substation planning method of an active distribution network. In particular, it relates to an active distribution network substation planning method based on an improved weighted Voronoi diagram suitable for accessing distributed power sources. Background technique [0002] The site selection and capacity determination of substations is an important part of distribution network planning, and its results will directly affect the network structure, reliability of power supply and economical operation and maintenance of the future distribution network. In recent years, my country has vigorously promoted the development and utilization of wind power and solar energy resources. The installed capacity of distributed power sources has continued to increase, and the power system has continued to develop in a low-carbon, green, and intelligent direction. Therefore, considering the capacity value of distributed power and participating...

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Problems solved by technology

However, these literatures did not establish an actual model for solving, and comprehensively considered the impact of the timing characteristics and load characteristics of the distributed power output on the DG confidence capacity, and could not effectively evaluate the capacity value of the distributed power; and the improvement of the Voronoi diagram ignored The characteristic that the power supply radius of the substation increases in the DG direction cannot reasonably coordinate the relationship between the distributed power supply and the supply load of the new substation

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