CN-121989739-A - Ordered charging method and system for community electric vehicles based on intelligent alternating-current charging pile

CN121989739ACN 121989739 ACN121989739 ACN 121989739ACN-121989739-A

Abstract

The invention discloses an ordered charging method and system for community electric vehicles based on intelligent alternating-current charging piles, which belong to the technical field of ordered charging of electric vehicles and comprise the steps of obtaining the load condition of a power distribution network; the method comprises the steps of receiving charging demands of community electric automobile users, feeding charging conditions back to the users, formulating an ordered charging strategy based on load conditions of a power distribution network and the charging demands of the community electric automobile users, monitoring battery states of the community electric automobiles in real time, judging whether the battery states are in a set range, if the battery states are in the set range, monitoring whether waiting community electric automobiles exist in real time, returning to the formulated charging strategy when the waiting community electric automobiles exist, and executing the ordered charging strategy when the waiting community electric automobiles do not exist. The intelligent alternating-current charging pile is guided by an intelligent charging technology mode, so that peak-valley difference is reduced, load fluctuation is reduced, and in addition, the intelligent alternating-current charging pile has a real-time monitoring function, so that the service life of a battery is prolonged, and the phenomenon of overcharge and overdischarge is prevented.

Inventors

SHAO JIANWEI
WANG JUNHUA
Yang Miaoran
DAI HAONAN
ZHANG YUHAN

Assignees

武汉大学

Dates

Publication Date: 20260508
Application Date: 20260211

Claims (9)

1. An ordered charging method for community electric vehicles based on intelligent alternating-current charging piles is characterized by comprising the following steps: S1, acquiring the load condition of a power distribution network; s2, receiving the charging requirement of the community electric automobile user, and feeding back the charging condition to the user; S3, formulating an ordered charging strategy based on the load condition of the power distribution network and the charging requirement of community electric automobile users; And S4, monitoring the batteries of the community electric vehicles in real time, judging whether the real-time monitoring data are in a normal range, if so, monitoring whether the community electric vehicles waiting in real time exist, returning to S3 to reform the ordered charging strategy, and if not, combining the number of intelligent alternating current charging piles of the communities and the number of planned parking spaces of the communities, and executing the current ordered charging strategy.
2. The method for orderly charging community electric vehicles based on intelligent alternating-current charging piles according to claim 1, wherein the method comprises the steps of considering whether the community electric vehicles wait for charging when the number of intelligent alternating-current charging piles of the community is smaller than the number of planned parking spaces of the community: if the user does not participate in the V2G scheduling and the set vehicle taking time is longer, the vehicle taking time is arranged according to the time set by the current waiting community electric vehicle, and if the waiting community electric vehicle participates in the V2G scheduling and the user vehicle taking time of the waiting community electric vehicle is after the first vehicle, the arranged charge and discharge time expression is as follows: , , Wherein t start.ahead 、t start.back is the time of two vehicles accessing a charging pile, t charge.ahead is the time of charging and discharging the former vehicle, t charge.back and t discharge.back are the time of charging and discharging the latter vehicle, k f is the discharging coefficient, k f =1 if the latter vehicle participates in V2G scheduling, and on the contrary k f =0,t end.ahead 、t end.back is the time of taking the two vehicles respectively. SOC end.ahead and SOC start.ahead are respectively a target SOC and an initial SOC of the former vehicle, SOC end.back and SOC start.back are respectively a target SOC and an initial SOC of the latter vehicle, P c.ahead 、P c.back is respectively a charging power of the two vehicles, P f.back is a discharging power of the latter vehicle, and C n.ahead 、C n.back is respectively a rated capacity of the two vehicles.
3. The ordered charging method for the community electric vehicles based on the intelligent alternating-current charging pile according to claim 2 is characterized in that if the user participates in the V2G scheduling and the set vehicle taking time is longer, the ordered charging and discharging time expression is as follows if the user waiting for the community electric vehicles to participate in the V2G scheduling and the vehicle taking time of the community electric vehicles is after the first vehicle: , , Wherein t discharge.ahead is the discharge time of the previous vehicle, t discharge.back is the discharge time of the next vehicle, and P f.ahead is the discharge power of the previous vehicle.
4. The ordered charging method of the electric vehicles in the communities based on the intelligent alternating-current charging piles, according to claim 1, is characterized in that the method further comprises the steps of charging and discharging according to the SOC condition and the peak-to-valley condition of electricity consumption of the electric vehicles in the communities when the number of the intelligent alternating-current charging piles in the communities is larger than the number of planned parking spaces in the communities, wherein the expression is as follows: , Wherein C n is the rated capacity of the electric automobile, SOC end and SOC start are the target SOC and the initial SOC respectively, P c is the charging power, t charge is the charging time, and eta c is the charging efficiency.
5. The ordered charging method for community electric vehicles based on intelligent alternating-current charging piles of claim 4, wherein if a user does not participate in V2G scheduling and the set vehicle taking time is long, charging time is arranged in a low electricity consumption period, and if the set time is short, vehicle taking is needed, full-power charging is directly carried out.
6. The method for orderly charging community electric vehicles based on intelligent alternating-current charging piles according to claim 4, wherein if a user participates in V2G scheduling and the set vehicle taking time is long, the remaining electric quantity of the community electric vehicles when accessing the charging piles is considered: if the power is lower than the minimum power protected by the battery and is in the peak period, charging is considered to be carried out in the low power period, then discharging is carried out in the peak period, and further charging is carried out in the valley period, or no discharging measures are taken, and charging is carried out in the valley period directly; If the accessed electric quantity is higher than the minimum electric quantity protected by the battery and is in the peak period, a discharging measure is firstly adopted, and then the battery is charged in the valley period.
7. The ordered charging method for community electric vehicles based on intelligent alternating-current charging piles of claim 1, wherein the ordered charging comprises active ordered charging and passive ordered charging: The active orderly charging is that charging and discharging are carried out by checking the charge and discharge electricity price predicted in each time period of the current day and reasonably selecting the time period; the passive ordered charging is that charging demands are input on the intelligent alternating-current charging pile, and an ordered charging strategy is formulated according to the charging demands.
8. The method for orderly charging community electric vehicles based on intelligent alternating-current charging piles according to claim 1, wherein if the real-time monitoring data is not in a normal range, the charging and discharging are suspended, and the numerical value is restored to a normal interval.
9. Ordered charging system of community electric automobile based on intelligent alternating-current charging stake, characterized in that includes: The first main module is used for acquiring the load condition of the power distribution network; the second main module is used for receiving the charging requirement of the community electric automobile user and feeding the charging condition back to the user; The third main module is used for making an ordered charging strategy based on the load condition of the power distribution network and the charging requirement of the community electric automobile user; And the fourth main module is used for monitoring the batteries of the community electric vehicles in real time and judging whether the real-time monitoring data are in a normal range, if so, the real-time monitoring is performed on whether the community electric vehicles waiting for the battery are in the normal range, if so, the third main module returns to the third main module to reform the ordered charging strategy, and if not, the current ordered charging strategy is executed by combining the number of intelligent alternating-current charging piles of the community and the number of planned parking spaces of the community.

Description

Ordered charging method and system for community electric vehicles based on intelligent alternating-current charging pile Technical Field The invention belongs to the technical field of ordered charging of electric automobiles, and particularly relates to an ordered charging method and system for community electric automobiles based on intelligent alternating-current charging piles. Background Along with the rapid development and popularization of new energy automobiles, the charging demand is also increased continuously, which brings great challenges to the operation pressure of a power distribution network, and meanwhile, the construction of charging piles has become a key ring for promoting green travel and realizing energy transformation. To solve this problem, an orderly charging mechanism is proposed and gradually applied. The country encourages the interactive technical innovation and test demonstration of the propulsion vehicle network, and supports the upstream and downstream construction of new energy vehicles and intelligent energy fusion innovation platforms of the industrial chains such as the power grid enterprise united vehicle enterprises and the like. The interaction of the vehicle network is enhanced, intelligent ordered charging is realized by utilizing a marketizing means or a technical means, and the charging amount in the electricity utilization peak period is translated to the electricity utilization valley period at night, so that the problem of overlarge load of the power network can be effectively solved. New energy automobiles are orderly charged based on the intelligent charging technology, and the charging start-stop time and the charging speed are controlled through communication between the charging pile and the new energy automobiles, so that the charging process is more efficient and orderly. The community is used as a core area of daily life of residents, and the parking time of the community electric vehicle is long and regular and is just matched with the charging requirement of the electric vehicle, namely, the characteristics of long time and low power. The alternating-current charging pile is arranged, so that a user can charge the community electric automobile at night or in the daytime when no one goes out, and the use convenience of the electric automobile is greatly improved. The mode of 'stop-and-fill-and-take-while-use' perfectly meets the requirements of modern fast-paced life, and green travel becomes easy and convenient. The cell charging pile can reasonably plan and expand the capacity according to the storage capacity of the electric automobile in the cell, so that the resource waste is avoided, and the efficient utilization of the electric power resource is realized. In addition, the user charges in the district of own home, avoids the possible phenomenon that the charging facilities in the peak period supply short supply and the low valley period are idle, and is favorable for improving the overall utilization rate of the charging facilities. At present, most of existing service objects for optimally setting charging piles are fixed-point stations for providing centralized charging service for public transportation such as buses and taxis and public stations for providing instant and scattered charging, and the research on district charging piles is less. Because community electric automobile is mainly commuted, resident charging time is mainly concentrated in the off-duty period, namely 18:00-6:00 (the next day), but under the general condition, peak periods of each place are mainly concentrated between 17:00-24:00, and if a large number of electric automobiles are in disordered charge, load 'peak valley difference' is increased, so that grid impact is aggravated. Disclosure of Invention The invention aims to solve the problem that the conventional community electric automobile disordered charge can cause load peak valley difference to be increased, and provides a community electric automobile ordered charge method based on intelligent alternating current charge piles, wherein service objects are the intelligent alternating current charge piles of communities, and the community electric automobile is ordered charged by formulating ordered charge strategies, the intelligent alternating current charge piles of the communities and the planned parking space quantity of the communities, so that the peak valley difference is reduced, load fluctuation is reduced, and the phenomenon of overcharge and overdischarge is prevented. According to an aspect of the present specification, there is provided an ordered charging method for community electric vehicles based on intelligent ac charging piles, including: S1, acquiring the load condition of a power distribution network; s2, receiving the charging requirement of the community electric automobile user, and feeding back the charging condition to the user; S3, formulating an ordered charging strategy based on the loa