Grounding resistance measurement method based on hybrid simulated annealing algorithm

A technology of grounding resistance and annealing algorithm, applied in the field of power transmission and distribution, can solve problems such as high initial value requirements and inaccurate calculation results, reduce workload and measurement cost, have broad application prospects, and improve work efficiency and accuracy. Effect

Pending Publication Date: 2020-12-01
CHANGCHUN INST OF TECH
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Problems solved by technology

[0003] See the paper "Application of Hybrid Genetic Algorithm in Grounding Resistance Measurement" published by Xing Hongyan, He Guixian, Xu Wei, etc. in "Journal of Electronic Measurement and Instrumentation", which proposes a hybrid genetic algorithm based on the double clamp method. This method combines the genetic algorithm with the classical algorithm to make up for the defect that the classical algorithm will fall into a local optimal solution, thereby better eliminating the measurement error caused by the traditional double-clamp method when measuring resistance, but The classic algorithm used in this algorithm still has the defects of high requirements on the initial value and inaccurate calculation results.

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  • Grounding resistance measurement method based on hybrid simulated annealing algorithm
  • Grounding resistance measurement method based on hybrid simulated annealing algorithm
  • Grounding resistance measurement method based on hybrid simulated annealing algorithm

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] Such as figure 1 Shown, a kind of grounding resistance measurement method based on hybrid simulated annealing algorithm, it comprises the following steps:

[0039] Step 1, generate the initial population S1, set the solution interval, set the population size N, and set the crossover probability P c , set the mutation rate P m , set the number of iterations T, and the binary number encodes the chromosome.

[0040] Set population size N=6, six initial chromosomes are x1=12, x2=15, x3=18, x4=10, x5=16, x6=19, crossover probability P c =0.66, mutation probability P m =0.001, the number of iterations T=1000;

[0041] The initial population S1 is generated after encoding the initial chromosome with a five-digit binary number;

[0042] Initial population S1: x1=12 (01100), x2=15 (01111), x3=18 (10010), x4=10 (01010), x5=16 (10000), x6=19 (10011).

[00...

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Abstract

The invention discloses a grounding resistance measurement method based on a hybrid simulated annealing algorithm, and relates to the technical field of power transmission and distribution. In order to overcome the defects in the prior art, the invention adopts the hybrid simulated annealing algorithm, and the algorithm inherits the global search capability of a genetic algorithm and also has thelocal search and rapid convergence capability of the simulated annealing algorithm, the solving accuracy is guaranteed while the solving speed is increased, and a globally optimal solution can be rapidly and accurately positioned. According to the invention, high-precision real-time monitoring can be carried out on various types of power transmission line grounding resistors in various regions under the condition that all grounding down leads are not disconnected, so that the method greatly improves the work efficiency and precision, and reduces the workload and measurement cost; and the method is suitable for a tower grounding resistance online monitoring system, and is very wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution, in particular to a grounding resistance measurement method based on a hybrid simulated annealing algorithm. Background technique [0002] Nowadays, the development of my country's economy and the improvement of people's living standards are more and more closely related to the power system. As an important part of the power system, the safety and stability of transmission lines are particularly important. The lightning protection capability of the tower grounding device has a direct impact on it. If the grounding resistance is too large, it will cause a trip accident due to counter-attack overvoltage. Therefore, it is particularly important to measure the grounding resistance value regularly to ensure the safety and stability of the transmission line. [0003] See the paper "Application of Hybrid Genetic Algorithm in Grounding Resistance Measurement" published by Xing...

Claims

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Application Information

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IPC IPC(8): G01R27/20G06F17/15G06N3/00G06N3/12
CPCG01R27/20G06F17/15G06N3/006G06N3/126
Inventor 王敏珍戴文涛赵立英倪虹霞李成刘超顾良翠王帆刘帅王忠博
Owner CHANGCHUN INST OF TECH
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