Distribution network protection fixed value setting method and system

A technology of distribution network system and protection setting value, applied in emergency protection circuit devices, electrical components and other directions, can solve the problem of low action accuracy, achieve accurate results, accurate and flexible setting, and improve the action accuracy and rationality. Effect

Active Publication Date: 2017-05-24
YUXI POWER SUPPLY BUREAU OF YUNNAN POWER GRID
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a distribution network protection setting value setting method and system for the problem that the traditional protection parameter setting method easily leads to low action accuracy of the protection device for abnormal situations in different operating states of the distribution network.

Method used

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  • Distribution network protection fixed value setting method and system
  • Distribution network protection fixed value setting method and system
  • Distribution network protection fixed value setting method and system

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Embodiment 1

[0026] In order to solve the problem that the traditional protection parameter setting method easily leads to low action accuracy of the protection device for abnormal situations in different operating states of the distribution network, the present invention provides Embodiment 1 of a distribution network protection setting method; figure 1 It is a schematic flow chart of embodiment 1 of the intelligent setting stage in the method for setting the value of distribution network protection in the present invention; as figure 1 As shown, the following steps may be included:

[0027] Step S110: When a fault occurs in the distribution network, obtain the power load loss of the distribution network system and the distribution line current value collected by the distribution terminal in the fault area of ​​the distribution network;

[0028] Step S120: Obtain the objective function of the distribution network protection setting value setting based on the preset distribution network fa...

specific Embodiment

[0135] Based on the above distribution network protection setting method and various embodiments of the system, at the same time, in order to solve the problem that the traditional protection parameter setting method easily leads to the low accuracy of the action of the protection device in different operating states of the distribution network, the special Taking a distribution network with distributed power sources connected to the grid as an example, the implementation process of a specific embodiment of the distribution network protection setting value setting system of the present invention is described. Figure 4 It is a schematic diagram of a local distribution network topology model in the implementation process of a specific embodiment of the distribution network protection setting value setting system of the present invention;

[0136] Such as Figure 4 As shown, the local distribution network includes 7 switches K1-K7; 2 distributed power sources G1 and G2; 7 power ...

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Abstract

The invention relates to a distribution network protection fixed value setting method and a distribution network protection fixed value setting system. The distribution network protection fixed value setting method comprises the steps of: acquiring an amount of power consumption load loss of a distribution network system and a distribution line current value acquired by a distribution network terminal in a distribution network faulty region when the distribution network fails; acquiring an objective function for distribution network protection fixed value setting based on a preset distribution network fault model according to the amount of power consumption load loss and the distribution line current value; acquiring a constraint condition of power transmission of the distribution network system; performing optimization calculation processing on a preset initialized particle swarm based on a multi-group collaborative differential evolution particle swarm algorithm according to the objective function and the constraint condition, so as to obtain an optimal particle; and decoding the optimal particle to obtain an optimized distribution network protection fixed value. The distribution network protection fixed value setting method and the distribution network protection fixed value setting system can improve the accuracy and rationality of actions of a protection device to abnormal situations under different operating conditions of the distribution network.

Description

technical field [0001] The invention relates to the technical field of protection of distribution network fault areas, in particular to a method and system for setting a fixed value of distribution network protection. Background technique [0002] At present, my country's distribution network is in a stage of rapid development. Different from the transmission network, the distribution network has a wide range of points and is directly associated with power users. Failures in the distribution network are likely to directly affect the user's satisfaction with electricity consumption. Therefore, distribution network protection has very important practical significance to restore power supply in non-faulty areas by isolating faulty areas. [0003] However, the operating state of the distribution network changes according to the change of the power load, which will cause the sensitivity, rapidity, and selectivity of the distribution network protection to change within a certain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
CPCH02H7/26
Inventor 赵华张雍忠张碧华杨金张春辉蒋渊
Owner YUXI POWER SUPPLY BUREAU OF YUNNAN POWER GRID
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