A Reactive Power Partitioning Method of Power Grid Combining Electrical Distance and Edge Betweenness

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

Active Publication Date: 2022-06-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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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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  • A Reactive Power Partitioning Method of Power Grid Combining Electrical Distance and Edge Betweenness
  • A Reactive Power Partitioning Method of Power Grid Combining Electrical Distance and Edge Betweenness
  • A Reactive Power Partitioning Method of Power Grid Combining Electrical Distance and Edge Betweenness

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[0084] Taking the actual power grid in a certain area of ​​southern China as an example, according to figure 1 The power grid reactive power partitioning method that integrates electrical distance and edge betweenness of the present invention is shown to partition the power grid, and calculate the partitioning conditions when t=0, t=1, and t=0.5 respectively. The schematic diagram of the partitioning is as follows: figure 2 , image 3 , Figure 4 . Among them, the thick dashed line represents the area boundary, the dashed border represents the power plant, and the solid line border 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 , because the electrical distance between No. 11 substation and No. 13 subst...

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Abstract

A grid reactive power partitioning method that combines electrical distance and edge betweenness: using power system analysis theory and graph theory to establish a grid reactive power network topology: constructing a power grid reactive power network topology without border weights: calculating electrical distance and characterizing two power system nodes The tightness of the electrical connection between them; define the power flow weight of the line; calculate the edge betweenness of the line; calculate the edge weight and use it as the edge weight of the reactive network topology of the power grid. Grid node partitioning based on GN algorithm: apply the task parallel mode in the parallel computing strategy to the GN algorithm; delete the edge with the largest edge weight; use reachability matrix B to judge whether a new partition is generated; judge whether the reactive capacity of the partition is sufficient ; Use the weighted modularity O to measure the quality of the power network partition results; re-divide the parameter matrix; judge whether the line is traversed, and store the partition results as the optimal partition scheme. In the present invention, by setting different proportional coefficients, a high-quality partition result can be obtained with a bias.

Description

technical field [0001] The present invention relates to a method for grid reactive power division. In particular, it relates to a grid reactive power partitioning method that integrates electrical distance and edge betweenness. Background technique [0002] The 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, resulting in a large voltage drop, which affects the voltage stability of the power system. Therefore, the real-time balance of local reactive power is a prerequisite for ensuring the 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 beneficial to improve the voltage level, and generally follows the following principles: strong coupling within the region, weak coupling between regions; a cert...

Claims

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Application Information

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Patent Type & Authority Patents(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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