Time-dimension electric vehicle optimizing charging method
A technology for electric vehicles and charging methods, applied in electric vehicle charging technology, electric vehicles, charging stations, etc., can solve problems such as deteriorating power quality, increasing power distribution system network losses, and insufficient charging equipment, and reducing the negative impact of the power grid. , the effect of improving the degree of freedom of charging
Inactive Publication Date: 2018-05-11
NANJING UNIV OF SCI & TECH
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Problems solved by technology
Due to the nonlinear load characteristics of electric vehicle chargers, large-scale electric vehicles are connected to the grid randomly and disorderly for charging, which may cause insufficient charging equipment, significantly increase the network loss of the power distribution system, and deteriorate the power quality and other adverse effects
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[0021] In order to solve the above technical problems, the present invention proposes an electric vehicle optimal charging method based on extended time dimension, comprising the following steps:
[0022] Step 1. Taking the charging behavior of residential areas as the object, analyze the charging behavior characteristics of electric vehicles that leave the house for the first trip on the day and return to the house after the last trip to choose to charge or keep standby, and judge whether the multi-day one-charge mode meets the requirements of some electric vehicles. operational requirements;
[0023] Step 2. On the premise that some electric vehicles adopt the multi-day charging mode, analyze the value range space of the charging start and end time of electric vehicles;
[0024] Step 3. On the premise that some electric vehicles adopt the multi-day charging mode, establish an electric vehicle charging optimization model based on the extended time dimension;
[0025] Step 4:...
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The invention discloses a time-dimension electric vehicle optimizing charging method. The time-dimension electric vehicle optimizing charging method comprises the steps that (1) by taking a residential area charging behavior as an object, the charging behavior characteristics of electric vehicles in the period from going out of residences for the first time per day to finishing going out and returning back to the residences for charging or stand-by for the last time per day are analyzed, and feasibility of a multiple-day one-time-charging mode of the electric vehicles is judged; (2) under thepremise that part of electric vehicles adopt the multiple-day one-time-charging mode, the domain space of the charging starting and ending time of the electric vehicles is analyzed; (3) an electric vehicle charging optimizing model based on an extended time dimension is established, the charging method of the electric vehicles is optimized, the influence of the electric vehicle charging load on anelectric power grid is reduced, and the utilization rate of the capacity of electric vehicle-mounted batteries is increased; and (4) according to the charging behavior characteristics and the domainspace of the charging starting time of the electric vehicles, the electric vehicle optimizing charging model is solved through a monte carlo method, and electric vehicle optimizing charging is realized. According to the time-dimension electric vehicle optimizing charging method, the influence of the charging load on the electric power grid is reduced, and the charging degree of freedom and the battery utilization rate are increased.
Description
technical field [0001] The invention belongs to the field of smart grids, in particular to an optimal charging method for an electric vehicle. Background technique [0002] Energy shortage and environmental degradation have become the most concerned issues in the world. If a country wants to develop sustainably, it must properly handle the relationship between economic development, energy conservation and environmental protection. As a developing country, China is facing serious energy and environmental problems. Energy conservation and emission reduction has become an urgent problem to be solved for the sustainable development of my country's economy. Electric vehicles have the characteristics of replacing oil with electricity and "zero emission" of exhaust gas. They are an important means to solve energy and environmental problems. Due to the non-linear load characteristics of electric vehicle chargers, large-scale electric vehicles connected to the grid randomly and di...
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IPC IPC(8): B60L11/18
CPCB60L53/63Y02T10/40Y02T10/70Y02T10/7072Y02T90/12
Inventor 孙璐姜媛王俊刘屹东许鸣吉
Owner NANJING UNIV OF SCI & TECH