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Distribution network frame planning method for conducting clustering and partitioning on basis of load points and considering geographical factors

A grid planning and load point technology, applied in the field of distribution network, can solve the problems of high system operation cost, increased investment cost, and increased spare capacity of tie lines.

Active Publication Date: 2018-08-21
NORTHEAST DIANLI UNIVERSITY
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AI Technical Summary

Problems solved by technology

These existing methods do not take into account the impact of uneven load distribution on the partitions. When the load distribution is uneven, some areas will be lightly loaded and some areas will be heavily loaded, resulting in high operating costs for the system. The reserve capacity of the tie line increases, and the investment cost increases

Method used

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  • Distribution network frame planning method for conducting clustering and partitioning on basis of load points and considering geographical factors
  • Distribution network frame planning method for conducting clustering and partitioning on basis of load points and considering geographical factors
  • Distribution network frame planning method for conducting clustering and partitioning on basis of load points and considering geographical factors

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Embodiment Construction

[0099] A distribution network grid planning method based on clustering and partitioning of load points and taking geographical factors into account according to the present invention comprises the following steps:

[0100] 1) Load point clustering and partitioning based on the improved mean clustering algorithm

[0101] The load weight factor is proposed to improve the mean value clustering algorithm, and then the load points within the power supply range of each substation in the planned area are clustered and partitioned. The introduction of the load weight factor can fully consider the impact on the cluster partition when the load distribution is uneven. influences;

[0102] ① Load weight factor

[0103] Load weight factor α of the jth load point j Calculated using formula (1),

[0104]

[0105] In the formula, j is the load point number, j=1,...,N node , N node is the total number of load points in the area to be planned; p j is the load size of the jth load point...

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Abstract

The invention relates to a distribution network frame planning method for conducting clustering and partitioning on the basis of load points and considering geographical factors. The method is characterized by comprising the steps that a clustering algorithm is improved through load weighting factors, the load points in service areas of all transformer substations in a to-be-planned area are clustered and partitioned, and the points with the smallest distance with the transformer substations in the partitions serve as source load points; a connection relation matrix capable of representing theupstream and downstream relationship of the load points is built according to power flow, the matrix is used for rapidly getting current of a circuit and judging the influence of the position of a tie line on faulty line downstream load transaction supply; by means of an improved minimum spanning tree algorithm, the main network frame planning scheme with the minimum annual investment, running and geographic barrier cost is obtained; in order to further improve the reliability of the scheme, tie line planning among the partitions is conducted by taking the minimum investment and power outagecost as the target, and different power outage cost calculation methods are adopted for different load transaction supply situations. The method is scientific, reasonable, simple and practical.

Description

technical field [0001] The invention relates to the field of distribution networks, and relates to a distribution network grid planning method based on clustering and partitioning of load points and taking geographical factors into consideration. Background technique [0002] The distribution network is an important part of the power system. Scientific and reasonable distribution network planning is an important means to ensure the safety and economic operation of the power grid, and the network frame planning plays a key role in the process of distribution network planning. The grid structure The optimization of is very important to ensure the reliability of power supply for users. Therefore, it is of great practical significance to study the planning method of distribution network grid. [0003] Grid planning is to establish a corresponding mathematical model from the perspective of economy and reliability of the scheme, and then obtain the optimal grid planning scheme by ...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20Y04S10/52
Inventor 肖白郭蓓姜卓
Owner NORTHEAST DIANLI UNIVERSITY
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