Proportion variation particle swarm algorithm-based reactive power optimization method for power distribution network

Abstract

The invention relates to a proportion variation particle swarm algorithm-based reactive power optimization method for a power distribution network. A method of proportion variation is added on the basis of a traditional particle swarm algorithm; when a certain condition is met during search for an optimal solution, variation can be carried out on a particle position according to the condition of each particle, so that the particle is prevented from falling into local optimum in the search process; in addition, the inertia weight of traditional linear change is also improved, the inertia weight is dynamically changed according to a feedback value, a w value becomes larger when the feedback value is greater than an average value, the particle search range is expanded, otherwise, the particle is searched in a relatively small range; and therefore, the whole particle space can be more accurately searched, and the convergence speed is also increased. Through verification, the proportion variation particle swarm-based reactive power optimization method for the power distribution network can be used for efficient management of the power distribution network when combined with an existing controllable device of the power distribution network, and higher convergence and optimization degree can be ensured during running.

Description

technical field [0001] The invention relates to a reactive power optimization method of a distribution network, in particular to a reactive power optimization method of a distribution network based on a particle swarm algorithm. Background technique [0002] In recent years, my country has vigorously advocated the use and development of renewable energy, and the access of distributed power sources and the construction of electric vehicle charging piles have gradually increased. These new changes have adverse effects on the voltage, loss, and reliability of the grid system. In order to reduce these influences and ensure the power supply quality of the power grid and the economic and safe operation of the system, it is necessary to regulate and control the on-load voltage regulation transformers and reactive power compensation devices that have been installed in my country's power grid. According to the requirements of the algorithm, the controllable on-load adjustable transf...

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Problems solved by technology

[0004] In order to overcome the shortcomings of the above algorithm, such as easy to fall into local optimum, poor convergence and insufficient optimization degree, etc.

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