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Reactive voltage partition method

A voltage partitioning and partitioning technology, applied in reactive power compensation, AC network voltage adjustment, electrical components, etc., can solve the problems of inability to comprehensively reflect the electrical connection between nodes, high time complexity and space complexity, and reduce the amount of calculation. , Good partition effect, reasonable structure effect

Active Publication Date: 2018-11-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the complex analysis network theory, when calculating the modularity by global search to determine the optimal number of network partitions, it requires high time complexity and space complexity, and the line weights defined in the calculation process cannot comprehensively reflect the relationship between nodes. electrical contact

Method used

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Embodiment 1

[0036] Such as figure 1 A reactive voltage partitioning method is shown, including:

[0037] A. Calculate the L-Q sensitivity matrix when the power grid system is in a critical state, and define the electrical distance based on it. Through judgment and comparison, select the distance between classes and combine the hierarchical clustering method to partition the load nodes to obtain the inner layer of the partition, and determine the number of partitions;

[0038] B. Calculate the reactive power flow of the system under a time section of the system, construct a directed weighted reactive topological graph of the system, and use the community discovery method based on the edge betweenness to partition the topological network to obtain the outer layer of the partition;

[0039] C. Formulate layer superposition principles based on reactive power reserve indicators, and perform layer superposition on the inner layer and outer layer of the partition to obtain the final partition re...

Embodiment 2

[0041] Based on the principles of the foregoing embodiments, this embodiment discloses a specific implementation manner.

[0042] This embodiment takes the IEEE-39 standard node system as an example to describe this solution in detail.

[0043] Calculate the L-Q sensitivity matrix when the power grid system is in a critical state, and use it to define the electrical distance. Specifically, the calculation method for the electrical distance between load node i and load node j in n-dimensional space is:

[0044]

[0045] Among them, d ij is the electrical distance matrix element between node i and node j, d ij =-lg|α ij alpha ji |;α ij is the system L index attenuation matrix element, Node j is reactive power injection node, node i is response node, represent the change of node reactive power and the change of L index respectively, and the change of L index on j is

[0046] Calculate the electrical distance between the load nodes of the system, and use the hierarch...

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Abstract

The invention discloses a reactive voltage partition method. The reactive voltage partition method comprises the following steps: A, calculating an L-Q sensitivity matrix when a power grid system is in a critical state, defining an electrical distance, selecting a proper between-class distance to combine with a hierarchical clustering method for partitioning a load node to obtain a partition innerlayer, and determining number of partitions; B, calculating system reactive power flow under a time section of the system to construct a directed weighted and reactive topological graph of the system, and adopting a community discovery method based on edge betweenness to partition the topological network to obtain the partition outer layer; C, establishing a map layer overlapping principle basedon reactive reserve indexes, and performing map layer overlapping on the partition inner layer and the partition outer layer, thereby obtaining final partition results. The obtained reactive partitionis reasonable in structure, can guarantee that the partition has sufficient reactive storage, and obtains relatively good partition effect.

Description

technical field [0001] The invention relates to the technical field of grid reactive voltage partitioning, in particular to a reactive voltage partitioning method. Background technique [0002] How to reasonably and effectively partition the reactive power and voltage of the power grid is one of the keys to the reactive power and voltage control scheme. As the power grid becomes larger and more complex, it becomes more and more difficult to analyze and monitor the power grid during operation. Traditional power grid partitioning relies on geographic regions and personnel operating experience, which cannot reflect the actual operating status of the power grid. Combining traditional analysis methods with modern complexity science to partition the power system and construct a reasonable grid structure is of great significance to the safe operation of the power system. [0003] At present, most of the existing reactive power and voltage partition methods are combined with hierar...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/16
CPCH02J3/00H02J3/16H02J2203/20Y02E40/30
Inventor 徐方维舒勤刘文通钟俊
Owner SICHUAN UNIV