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Power grid reactive power partitioning method fusing electrical distance and side betweenness

A technology that integrates electrical and electrical distances, and is applied in electrical components, reactive power compensation, and AC network voltage adjustment, etc.

Active Publication Date: 2021-08-06
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are certain limitations in these two perspectives, and it is necessary to establish a grid reactive power partition method that takes the two into consideration

Method used

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  • Power grid reactive power partitioning method fusing electrical distance and side betweenness
  • Power grid reactive power partitioning method fusing electrical distance and side betweenness
  • Power grid reactive power partitioning method fusing electrical distance and side betweenness

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[0084] Taking the actual power grid in a region in southern China as an example, according to figure 1 A kind of grid reactive power partitioning method of the present invention that fuses electrical distance and side betweenness shown in the present invention partitions the grid, respectively calculates the partition situation when t=0, t=1, and t=0.5, and the schematic diagram of the partition is as follows figure 2 , image 3 , Figure 4 . Among them, the thick dotted line represents the regional boundary, the dotted line frame represents the power plant, and the solid line frame represents the substation.

[0085] Compared figure 2 and image 3 It can be seen that when t=0, γ ij = d ij , the grid partition is more inclined to the electrical connection between nodes; when t=1, γ ij = β ij , the grid partition is more inclined to the network relationship between nodes. for example figure 2 In the middle, because the electrical distance between No. 11 substation ...

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Abstract

The invention discloses a power grid reactive power partitioning method fusing electrical distance and edge betweenness. The method comprises the following steps: establishing a power grid reactive power network topology by applying a power system analysis theory and a graph theory, constructing a power grid reactive power network topology without edge weight, calculating the electrical distance and representing the closeness degree of electrical connection between two power system nodes; defining a line power flow weight; calculating the edge betweenness of the line; calculating an edge weight and taking the edge weight as the edge weight of the reactive network topology of the power grid; carrying out partitioning on power grid nodes based on a GN algorithm, and applying a task parallel mode in a parallel computing strategy to a GN algorithm; deleting the edge with the maximum edge weight; judging whether a new partition is generated or not by utilizing a reachable matrix B; judging whether the reactive capacity of the partition is sufficient or not; utilizing the weighted modularity O to measure the advantages and disadvantages of the power network partitioning result; re-dividing the parameter matrix; and judging whether the line is traversed or not, and taking the stored partitioning result as the optimal partitioning scheme. According to the method, different proportionality coefficients can be set, so that an emphasized high-quality partitioning result can be obtained.

Description

technical field [0001] The invention relates to a reactive power partitioning method of a power grid. In particular, it relates to a grid reactive power partitioning method that combines electrical distance and edge betweenness. Background technique [0002] Grid voltage is closely related to reactive power. From the perspective of power system transmission, long-distance transmission of reactive power will cause a large amount of loss and large voltage drop, which will affect the voltage stability of the power system. Therefore, real-time balance of local reactive power is a prerequisite for ensuring voltage stability of the entire network. [0003] Partitioning the power system is the process of partitioning the nodes of the power system. Reasonable and effective reactive power partitioning is conducive to improving the voltage level, and generally follows the following principles: strong coupling within the region and weak coupling between regions; a certain reactive po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16
CPCH02J3/16H02J2203/10Y02E40/30
Inventor 李鹏王加浩李建宜夏辉徐晓春郭天宇
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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