Selection method of optimal charging access point for electric vehicles based on mopso algorithm
An access point selection, electric vehicle technology, applied in the direction of electric vehicle charging technology, electric vehicles, charging stations, etc., can solve the problems of unreasonable charges, inaccurate energy measurement, inaccurate measurement, etc., and achieve good application prospects and commercial Value, high active power line loss, good applicability
Active Publication Date: 2022-06-17
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
At this time, the electric vehicle charging station uses a three-phase single meter to measure the load of each phase user, and it is not reasonable to charge each phase user based on the measurement value of each phase single meter. There are measurement errors, and the traditional electric energy measurement method cannot be accurately measured.
The present invention proposes a method for selecting the best charging access point for electric vehicles using the MOPSO algorithm to solve the problem of inaccurate electric energy measurement and at the same time reduce the line loss of the charging network to the greatest extent
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[0040]The purpose of the invention is to reduce the three-phase current imbalance caused by the random access of the electric vehicle to the charging network as a single-phase load, so as to solve the unreasonable charging of single-phase users according to the metering value of each phase and single meter during the charging process of the electric vehicle problems, while minimizing line losses in the charging network. like figure 2 where (1) represents a 10kV / 0.4kV transformer, the left end of the transformer is the power grid, (2) represents the No. 1 access point of the three-phase A, B, and C phases, and (3) represents the No. 1 access point of the neutral line N point, (4) represents the access point No. 3 of the three-phase A, B, and C, and (5) represents the access point No. 4 of the neutral line N. R represents the resistance between the adjacent charging piles (access points) of A, B, C three-phase and neutral line N. When the access point of the electric vehicle ...
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The optimal charging access point selection method for electric vehicles based on the MOPSO algorithm takes the line loss and three-phase current imbalance of the electric vehicle charging network as the optimization goals. The electric energy metering optimization model is established, and the multi-objective particle swarm optimization algorithm is used to solve the established electric energy metering optimization model, and the best charging access point is selected according to the obtained optimal solution set. The three-phase current imbalance of the charging network is reduced to within the allowable range stipulated by the national standard, so as to realize the accurate measurement of the electric energy of electric vehicle users and minimize the line loss of the charging network. The invention solves the problem of unreasonable charging for single-phase users due to the unbalanced three-phase current caused by unbalanced load in the charging process of the electric vehicle, and reduces the line loss of the charging network at the same time.
Description
technical field [0001] The invention relates to the field of electric vehicle charging electric energy measurement, in particular to a method for selecting an optimal charging access point for an electric vehicle using a multi-objective particle swarm optimization (Multi-Objective Particle Swarm Optimization, MOPSO) algorithm. Background technique [0002] In recent years, with the increasing depletion of fossil energy and environmental pollution, governments around the world have gradually realized the importance of reducing fossil energy consumption and greenhouse gas emissions for sustainable human development. Accelerating the development of new energy vehicles can not only effectively alleviate the environmental pressure and energy crisis, but also promote the transformation and upgrading of the automobile industry. In order to ensure the rapid growth of the number of new energy vehicles, the promotion and use of their charging facilities is particularly important. [0...
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IPC IPC(8): B60L53/00B60L53/62B60L53/66
CPCB60L53/00B60L53/62B60L53/66Y02T90/16Y02T90/14
Inventor 王兴贵李项王海亮李晓英郭群杨维满郭永吉王琢玲
Owner LANZHOU UNIVERSITY OF TECHNOLOGY