Island generation method for radial loop-free distribution network using snop for power restoration

A technology for power supply recovery and distribution network, which is applied in the direction of circuit devices, AC network circuits, emergency treatment AC circuit layout, etc., can solve the problems of unfavorable popularization and application, low actual income, etc., and achieve the effect of reducing the difficulty of analysis and high calculation efficiency

Active Publication Date: 2021-10-26
STATE GRID ZHEJIANG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the basic configuration and application of SNOP in the power system can be realized through the above planning and optimized configuration schemes, the benefits of SNOP network loss reduction rapidly tend to be saturated with the increase of SNOP capacity. Therefore, if SNOP is only used to reduce Under the power system network loss, the actual income of this equipment is low, and the high investment cost will become the main limiting factor of multi-SNOP planning, which is not conducive to its promotion and application

Method used

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  • Island generation method for radial loop-free distribution network using snop for power restoration
  • Island generation method for radial loop-free distribution network using snop for power restoration
  • Island generation method for radial loop-free distribution network using snop for power restoration

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Embodiment 1

[0028] The present invention relates to the power system failure state analysis technology under natural weather disasters, specifically a kind of typhoon and other natural weather disasters, by analyzing the power system topology structure under the application of SNOP equipment, so as to generate system islands that can be recovered by SNOP equipment The algorithm technology of the combination of isolated island nodes for power supply is introduced in detail as follows:

[0029] Such as Figure 1-2 As shown, a radial loop-free distribution network island generation method using SNOP for power supply recovery, the steps are as follows:

[0030] Step 1: Form a complete topological connection between SNOP nodes, and classify the topological nodes of the distribution network containing SNOP.

[0031] First define the island: the island node proposed in this design that can restore power supply under the action of SNOP has the following two prerequisites: one is that the node wi...

Embodiment 2

[0044] according to figure 1 The 33-node distribution network topology with SNOP in (a) is analyzed as an example, and the design algorithm is used to solve all possible island combinations. The various types of nodes and the included nodes are shown in Table 1.

[0045] Table 1 Classification of distribution network topology nodes

[0046]

[0047] According to the classification of each node in Table 1, the possible islands are generated according to the search algorithm of this design. The specific island generation process is demonstrated as follows image 3 shown. Subsequent combination image 3 Describe the build process.

[0048] According to the node classification, select node 11 (root node) as the starting point of the retrieval algorithm. Node 11 divides the island into left and right parts as a whole, and the left part of the island node combination in front of the contact node may be [11-10], [11-10 -9] until [11-10-…-5] and other combinations, the right p...

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Abstract

The invention provides a method for generating islands of radial non-loop distribution network by using SNOP to restore power supply. The steps include: forming a complete topological connection between SNOP nodes, and classifying topological nodes of a distribution network containing SNOP; performing stepwise retrieval of isolated island nodes according to the topology; repeating an iterative retrieval algorithm to generate all distribution network islands containing SNOP. The algorithm makes full use of the radial topological characteristics of the distribution network, performs topology analysis and node definition according to the power flow direction and the position of the SNOP equipment in the distribution network topology, and reduces the difficulty of overall system analysis. The invention generates a SNOP island algorithm according to the network topology, which is simple and practical, and has high calculation efficiency. When an actual natural disaster occurs, it is beneficial for the power grid dispatcher to make timely optimization and adjustment according to the combination of isolated island nodes and power grid status indicators, and then can use the fast recovery power supply capability of the SNOP Avoid large-scale power outages in the distribution network.

Description

technical field [0001] The invention relates to a method for generating islands in a radiation-type non-loop distribution network using SNOP for power supply recovery. Background technique [0002] The distribution network is an important part of the terminal power supply, and with the extensive integration of distributed energy, the shortcomings of the traditional distribution network fixed topology and priority control methods have become increasingly prominent. In view of this problem, the application of new power electronic technology to improve the active control ability of distribution network has become an important solution. Among them, as one of the new power electronic equipment, the intelligent soft switch (soft normally-open point, SNOP) is a power electronic device installed at the traditional tie switch, which has flexible voltage and power adjustment capabilities and superior performance, and is reducing the network It also has a significant optimization effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/00G06K9/62G06Q10/04G06Q10/06G06Q50/06
CPCH02J3/388H02J3/001G06Q10/04G06Q10/06393G06Q50/06G06F18/24
Inventor 沈舒仪何英静何东黄锦华兰洲朱克平李帆周林但扬清王曦冉梁婧王竹静葛菊女邢红敏邬樵风钱佳佳陈佳玺顾晨临俞楚天杨恺
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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