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A distribution network capacitor configuration method based on genetic algorithm guiding trust-tech technology

A genetic algorithm and configuration method technology, applied in the field of distribution network capacitor configuration, can solve the problems of performance dependence, unable to obtain global optimal solution, large amount of calculation, etc., to reduce network loss and operating cost, and improve local optimization ability , the effect of optimizing the voltage distribution

Active Publication Date: 2018-02-23
RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] However, the performance of this type of algorithm depends on parameter selection and has a large amount of calculation, which has the disadvantages of not being able to obtain the global optimal solution and the randomness of the results.

Method used

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  • A distribution network capacitor configuration method based on genetic algorithm guiding trust-tech technology
  • A distribution network capacitor configuration method based on genetic algorithm guiding trust-tech technology
  • A distribution network capacitor configuration method based on genetic algorithm guiding trust-tech technology

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0048] Such as figure 1 As shown, the Trust-Tech technology based on the genetic algorithm will be divided into two stages and applied to the capacitor configuration problem:

[0049] Exploration stage using genetic algorithm and development stage using Trust-Tech technology.

[0050]The core feature of Trust-Tech technology is that it can find all local optimal solutions and find the global optimal solution through layer-by-layer search. If the initial point is not close to the global optimal solution, several layers of local optimal solution search calculations are required to find the global optimal solution. Therefore, the goal of the first phase is to reduce the number of layers of Trust-Tech calculations.

[0051] Phase 1: Exploration Phase

[0052] There are many different types of genetic algorithms. One of its advantages is that it does no...

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Abstract

The invention discloses a distribution network capacitor configuration method based on genetic algorithm guiding Trust-Tech. The distribution network capacitor configuration method includes the steps of taking the minimum total cost during the operation of a distribution network capacitor as an objective function, and establishing a constrained non-linear optimization model for capacitor configuration; constructing flow equations, node voltage, circuit thermal limit and constraints under which the maximum / minimum number of capacitors can be installed; representing each individual in a group with a binary character string, using a genetic algorithm for determining an initial optimal solution in a random search manner, and reducing the number of optimization layers; and using the Trust-Tech for finding out a local optimal solution of each region by searching layer by layer until search conditions are met. The invention overcomes the difficult problems that optimization problems are highly nonlinear, control variables are mixed integers, a global optimal solution is hard to obtain by using a conventional method and the calculated amount results are random while solving the capacitor configuration problem in the distribution network.

Description

technical field [0001] The invention relates to a distribution network capacitor allocation method guided by a genetic algorithm based on Trust-Tech technology. Background technique [0002] The distribution network is the last link of power supply. If there is a large amount of reactive power flowing in the network, the network loss of the distribution network will increase and the voltage quality will become low. Therefore, under the condition that the active transmission power remains unchanged, the transmission of reactive power in the network should be reduced as much as possible. This requires the configuration of reactive power in the network to balance the reactive power on the spot. This method is economical and effective, but how to reasonably configure the reactive power Power supply is a very complex problem. [0003] The reactive power optimization problem of distribution network is a large-scale nonlinear programming problem with multiple constraints, integers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCH02J3/18H02J2203/20Y02E40/30
Inventor 吴健孙伟吴奎华杨波梁荣冯亮郑志杰杨慎全张晓磊李昭李凯张雯刘淑莉邓少治杜鹏
Owner RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER
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