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Power distribution network reconstruction method based on isolation ecological niche genetic algorithm

A technology of distribution network reconfiguration and genetic algorithm, applied in the field of distribution network optimization, can solve problems such as premature genetic algorithm

Inactive Publication Date: 2016-08-24
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a distribution network reconfiguration method based on the isolated niche genetic algorithm, which takes the minimum network loss as the main goal and load balance a

Method used

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  • Power distribution network reconstruction method based on isolation ecological niche genetic algorithm
  • Power distribution network reconstruction method based on isolation ecological niche genetic algorithm
  • Power distribution network reconstruction method based on isolation ecological niche genetic algorithm

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Embodiment

[0127] IEEE33 node power distribution system such as figure 2 As shown, the system has 37 branches, 33 nodes, and 5 tie switches: TS 7-20 , TS 8-14 , TS 11-21 , TS 17-32 , TS 24-28 The rated voltage is 12.66kV. The total active and reactive loads of the system are: 3715kW and 2300kvar respectively.

[0128] The selection of parameters in the isolated niche genetic algorithm adopts a heuristic method according to the actual situation of the power distribution network [8] Obtained; Since they are relatively independent from each other in terms of the meaning of the operating parameters and the optimization results, it is possible to assume that other parameters are fixed first, study the best selection value of a single parameter, and then synthesize. In the calculation example: the chromosome code length is 5, the initial population is 60, the number of subgroups is 5, the maximum allowable size of the subgroup is 18, the minimum protection size is 6, the crossover rate ...

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Abstract

The invention relates to a power distribution network reconstruction method based on an isolation ecological niche genetic algorithm. The power distribution network reconstruction method is characterized in: researching to use a target normalization method to obtain the efficient solution; taking minimum network loss as the main target; taking load balancing as the constrained condition to process and establish a compromise model; and bringing forward a chromosome integer coding mode to ensure one-to-one correspondence between the chromosome and the feasible solution. The power distribution network reconstruction method based on an isolation ecological niche genetic algorithm can effectively solve the premature convergence problem of the genetic algorithm and can quickly converge to the optimal solution by introducing the isolation ecological niche genetic algorithm, and at the same time, aiming at that binary coding cannot effectively reflect the structural features of the power distribution network reconstruction problem, the power distribution network reconstruction method provides the chromosome integer coding mode, thus greatly reducing the chromosome length and improving the operation speed; and by means of introduction of the isolation ecological niche technique, the power distribution network reconstruction method effectively solves the premature convergence problem of a traditional genetic algorithm on solving the power distribution network reconstruction problem.

Description

technical field [0001] The invention relates to the technical field of distribution network optimization, in particular to a distribution network reconfiguration method. Background technique [0002] The distribution network is a link in the power system from power generation to power consumption. It is distributed in the load center area and directly provides power for each user. Among the comprehensive line losses of all levels of power grids in the power system, the line losses of medium and low voltage distribution networks account for a large proportion. Therefore, under the condition of satisfying the operation reliability of the medium voltage distribution network, it is a topic worth studying to reduce the line loss through network reconfiguration. [0003] Distribution network reconfiguration is a multi-objective nonlinear hybrid optimization problem, and most of the existing algorithms use a single objective function as the model. Due to the nonlinear characteris...

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Application Information

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IPC IPC(8): H02J3/00H02J3/06G06N3/12
CPCG06N3/126H02J3/00H02J3/06H02J2203/20
Inventor 宫林胡晓锐向菲刘育明周李
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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