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Electric vehicle charging method and system

A technology of electric vehicles and charging methods, which is applied in the field of electric vehicle charging methods and systems, can solve the problem of insufficient battery stability, inability to solve power demand, load characteristics and gasoline consumption, and calculate power demand, load characteristics and Issues such as the influence deviation of gasoline consumption

Pending Publication Date: 2020-02-14
STATE GRID ELECTRIC VEHICLE SERVICE CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these studies have comprehensively considered the joint operation optimization of electric vehicles, distributed power sources, and energy storage systems, they are basically researched solely from the perspective of electric vehicle regulation, and cannot well solve the problems of power demand, load characteristics, and gasoline consumption. At the same time, due to the insufficient battery stability of existing electric vehicles, there are also deviations in the calculation of the impact on power demand, load characteristics and gasoline consumption

Method used

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  • Electric vehicle charging method and system
  • Electric vehicle charging method and system
  • Electric vehicle charging method and system

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Experimental program
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Effect test

Embodiment 1

[0083] Embodiment 1: A hierarchical control method for orderly charging of electric vehicles with good scalability. Such as figure 1 As shown, the hierarchical method proposed by the present invention is divided into three layers: the main control center, the secondary control center, and the electric vehicle.

[0084] Each layer carries out the control activities of each level relatively independently on the basis of obeying the main control target through complementary means, and provides flexibility and independence for each level's own control activities on the basis of meeting the overall control target.

[0085] Among them, the main control center establishes a two-stage optimization model with the goal of peak shaving and valley filling based on the energy and power boundaries of electric vehicles given by the secondary control center and the output forecast and new energy abandonment rate given by new energy power generation, and calculates The electric vehicle chargi...

Embodiment 2

[0149] Embodiment 2: Based on the same inventive concept, the present invention also provides an algorithm for the hierarchical control model of ordered charging of electric vehicles, the process of which is as follows figure 2 shown.

[0150] First, the electric vehicle uploads information such as power, capacity, SOC (State of Charge, battery state of charge), and charging start and end time to each secondary control center; each secondary control center calculates the constraints of the electric vehicle and uploads it to the main control center; The control center solves the two-stage optimization model according to the constraints uploaded by the secondary control center and the predicted output uploaded by the new energy power generation, and obtains the load guidance curve and new energy output of each secondary control center; the secondary control center uses the centralized / The distributed control method guides the charging load of electric vehicles to follow the gu...

Embodiment 3

[0151] Embodiment 3: Carry out calculation example simulation on the process of the above embodiment 2 by means of simulation

[0152] 1. Simulation settings

[0153] It is assumed that there are three secondary control centers A, B, and C under the main control center. The peak daily loads are 3715kW, 4000kW, and 4500kW respectively, and the upper power limits are 4000kW, 4500kW, and 5000kW respectively. The loads corresponding to the distribution network areas of A and C secondary centers are mainly residential loads, the corresponding regional loads of B secondary centers are mainly industrial and commercial loads, and there are new energy power generation mainly based on wind power in area B. The conventional load curve and predicted wind power output in the corresponding area of ​​the tertiary center (the wind power output data comes from a wind farm in a certain area in North China) are as follows: image 3 shown.

[0154] Here, the rated charging power of the electric...

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Abstract

The invention discloses an electric vehicle charging method and system. The method comprises the steps of substituting battery information and charging time of an electric vehicle into a secondary control center optimization model for calculation based on each secondary control center; substituting the calculation result and the predicted output of new energy power generation into a two-stage optimization model for calculation to obtain a load guidance curve of each secondary control center; formulating a charging load following guidance curve of each electric vehicle under the secondary control center based on the load guidance curve; and charging the electric vehicle according to the charging load following guidance curve. According to the invention, the orderly charging load following method for the electric vehicle can be embedded into a hierarchical control method, and the write control problem of electric vehicle charging and clean energy power generation can be solved by means of the hierarchical control method, so that the charging behavior of the electric vehicle can be better matched with intermittent new energy power generation, and thus economic benefits and social benefits are created for the society, the power grid and electric vehicle operators.

Description

technical field [0001] The invention relates to the fields of electric vehicle charging, new energy consumption, computer technology, etc., and specifically designs an electric vehicle charging method and system. Background technique [0002] The charging demand of electric vehicles is both controllable and random. In addition, clean energy power generation, mainly wind power and photovoltaic power generation, is limited by natural conditions, and its output is random and intermittent. How to consider the uncertainty of electric vehicle charging demand and clean energy power generation output, solve the shortcomings of current high-power wired charging equipment such as complex structure, large impact on the power grid and batteries, and realize the effective integration of large-scale electric vehicles and clean energy power generation Sequential charging control, which can realize the cleanliness of electric vehicles under the collaborative charging method, is one of the ...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/0525H01M10/058H01M10/44H01M10/42
CPCH02J7/0013H02J7/007H01M10/0525H01M10/058H01M10/441H01M10/425H01M2010/4271H01M2220/20Y02E60/10Y02T10/40Y02P70/50
Inventor 史双龙严喆李帅华邢宇恒陈云
Owner STATE GRID ELECTRIC VEHICLE SERVICE CO LTD
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