Inverse time limit overcurrent constant value optimization method based on difference-pollen algorithm

An optimization method and an inverse time limit technology, applied in design optimization/simulation, calculation, calculation model, etc., can solve problems such as many times of simulation, slow calculation speed, and long time consumption

Inactive Publication Date: 2020-10-30
GUIZHOU POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the problems of slow calculation speed, small calculation capacity, large number of simu

Method used

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  • Inverse time limit overcurrent constant value optimization method based on difference-pollen algorithm
  • Inverse time limit overcurrent constant value optimization method based on difference-pollen algorithm
  • Inverse time limit overcurrent constant value optimization method based on difference-pollen algorithm

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Embodiment 1

[0049] refer to Figure 1~2 , which is the first embodiment of the present invention, provides a basic flow chart of an inverse time-limit overcurrent setting optimization method based on the difference-pollen algorithm, and establishes a protection setting coordination optimization model according to a specific optimization problem; based on the optimization model Drafting an objective function and a decision variable, initializing the basic parameters of the difference-pollen algorithm; finding the optimal solution in the basic parameters after initialization according to the difference-pollen algorithm; using the model to check whether the optimal solution satisfies the termination condition, If satisfied, the optimal solution is output to complete the optimization.

[0050] Further, this embodiment proposes an inverse-time overcurrent constant value optimization method based on the difference-pollen algorithm, including:

[0051] S1: Establish the optimization model accor...

Embodiment 2

[0098] The technical effect adopted in this method is verified and explained. In this embodiment, the classic particle swarm optimization algorithm, pollen algorithm, gray wolf algorithm and this method are selected for comparative testing, and the test results are compared by means of scientific demonstration to verify the advantages of this method. real effect.

[0099] The method designed in the present invention is verified according to the following simulation examples.

[0100] The present invention builds such as on Matlab platform image 3 6-bus system shown. In the simulation of this system, the fault is set at the three-phase short-circuit fault near the outlet side of the protection, the fault current flowing through the main and backup protection devices is shown in Table 1, and the current transformer ratio of each protection device is shown in Table 2.

[0101] According to the 6-bus system protection setting optimization problem, this paper selects 4 intellige...

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Abstract

The invention discloses an inverse time limit overcurrent constant value optimization method based on a difference-pollen algorithm. The method comprises the following steps: establishing a protectionsetting coordination optimization model; drawing up an objective function and a decision variable based on the model, and initializing basic parameters of the difference-pollen algorithm; searching an optimal solution for the parameters according to specific steps of a difference-pollen algorithm; and checking whether a termination condition is satisfied based on the optimal solution, and outputting the optimal solution to complete an optimization process. According to the method, the optimization performance is greatly improved, the convergence speed is increased, the solving precision is improved, and an idea is provided for the online setting and checking problem of the inverse time limit overcurrent protection constant value in the future.

Description

technical field [0001] The invention relates to the technical field of setting work of relay protection fixed value in electric power system, in particular to an inverse time overcurrent fixed value optimization method based on difference-pollen algorithm. Background technique [0002] With the continuous development of science and technology and the continuous improvement of social needs, the scale and complexity of power grids have also increased accordingly. This will bring more serious challenges to relay protection. According to research at home and abroad, there is a close relationship between large-scale and large-scale power outages in the power system and false refusal of relay protection devices. In order to better protect the safety of power equipment and more effectively prevent such large-scale accidents, the setting, checking and optimization of relay protection settings are particularly important. Because the traditional definite time protection is greatly af...

Claims

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Application Information

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IPC IPC(8): H02H3/00H02H1/00G06F30/27G06N3/12G06N3/00
CPCG06N3/006G06N3/126G06F30/27H02H1/0092H02H3/006
Inventor 罗琨张金荣李正新刘丽周坤郝东方李勇周宇李义徐岩
Owner GUIZHOU POWER GRID CO LTD
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