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A Method of Network Partitioning Based on NWBBO Algorithm

A power grid partitioning and algorithm technology, applied in the direction of calculation, calculation model, electrical components, etc., can solve problems such as the influence of the relay protection system, and achieve the effect of accelerating the convergence speed, enhancing the adaptability and robustness, and shortening the average path length.

Active Publication Date: 2022-05-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Island operation not only has a great impact on smart grid dispatching, automation system, relay protection system and automatic reclosing, but also has its own security and stability problems

Method used

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  • A Method of Network Partitioning Based on NWBBO Algorithm
  • A Method of Network Partitioning Based on NWBBO Algorithm
  • A Method of Network Partitioning Based on NWBBO Algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Use as attached figure 2 The shown IEEE-39 node system, the system includes 39 nodes, 47 branches, including 10 power supplies, 19 electrical equipment, and the balance unit is on the 39th node.

[0051] Step 1: The engine and load nodes in this embodiment are equivalent to the corresponding nodes, and the lines between are equivalent to the edges of the connection points, thereby abstracting the topology of the network as shown in Figure 3, which includes the adjacency matrix The construction of the adjacency matrix will be used for network structure analysis. This topology diagram can clearly indicate the network connection relationship in the IEEE-39 node system and can be analyzed as follows:

[0052] (1) The IEEE-39 node system contains multiple rings, and the existence of the ring structure significantly strengthens the community characteristics of the network;

[0053] (2) The network contains 3 important partitions, each of which is based on node 16 and multi...

Embodiment 2

[0076] Use as attached Figure 7 As shown in the IEEE-118 node system, the system network includes 118 nodes (15 engine nodes and 93 load nodes) and 186 branches.

[0077] The process of this embodiment is basically the same as that of Embodiment 1. The special feature is that the network scale is relatively large, and the number of partitions is 5, which can represent the applicability of this algorithm to large-scale smart grids.

[0078] according to Figure 7 The actual circuit connection in the network, the IEEE-118 node connection relationship is abstracted into a network topology diagram as shown in Figure 8 , the IEEE-118 node system can be roughly divided into three main partitions, with nodes 49, 100 and node 12 as the center respectively, similar to the IEEE-39 node system, the Newton-Raphson method is used to calculate the power flow of the network, and the calculation formula is as follows

[0079]

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Abstract

The invention provides a power grid partition method based on the nwbbo algorithm, which is used for reasonable and scientific partition of the power grid; the algorithm improves the optimization performance of the original bbo algorithm by virtue of the characteristics of fast exchange of node information in the small world model; The topological relationship of the power network is abstracted, and the network composed of nodes and edges is used to reflect the connection between important components in the power grid. to get the weight of the weighted grid network, that is, the grid flow S ij . Finally, the nwbbo algorithm is used to divide the area of ​​the power grid network. With the help of the new algorithm, the strong mining ability of hidden communities in the complex network is used to obtain the community relationship existing in the power grid network, and the grid partition result is obtained according to the community relationship. The invention can partition the power grid through relatively perfect calculation, ensure the safe operation of the power grid and improve the efficiency.

Description

technical field [0001] The invention relates to the technical field of safe and stable operation of electric power systems, in particular to a grid partitioning method based on the nwbbo algorithm. Background technique [0002] With the continuous increase of energy demand, the power system needs to build a high-voltage power grid capable of delivering large-capacity power. However, the emergence of a new voltage level power grid requires years of construction and continuous improvement before it can gradually become stronger and more reasonable in structure. In this process, the power system will inevitably experience the operation of high and low voltage electromagnetic ring networks. [0003] As far as the current situation of power grid operation is concerned, high and low voltage electromagnetic ring network operation is a relatively common operation mode. Electromagnetic ring network means that after the busbars of different voltage levels are connected by transformers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06Q10/04G06Q50/06G06N3/00
CPCH02J3/00G06Q10/04G06Q50/06G06N3/006
Inventor 刘芳宇谢刚张朝霞高飞张海涛张凯彦潘沈洋赵政朋
Owner TAIYUAN UNIV OF TECH
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