An Equivalent Method of Distributed Power Supply Based on Electric Vehicle Discharging Behavior
A distributed power supply and electric vehicle technology, applied in the field of efficiency, can solve the problems of inapplicability, lack of discreteness and randomness of electric vehicles, etc., and achieve the effect of reducing workload, good portability, and wide application prospects
Active Publication Date: 2022-03-01
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
The above studies all have the same disadvantages, that is, there is no qualitative and quantitative research on the impact of electric vehicle discharge on the protection and control of urban power grids, and the discreteness and randomness of electric vehicles are insufficiently reflected, so it cannot be applied to the grid with a large number of electric vehicles. Power system analysis work such as distribution network power flow analysis and fault characteristic analysis
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specific Embodiment
[0068] It is assumed that a certain area can be divided into six areas: residential area, work area, teaching area, social area, shopping area and others. The distance between each area is shown in Table 1.
[0069] Table 1
[0070]
[0071] There are a total of 8,000 electric vehicles in the area. Each electric vehicle leaves the residential area in the morning and returns to the residential area after the trip of the day. The battery capacity of each electric vehicle is 18kW h, and the power consumption per 100 kilometers is 10kW h , the charging power is 3000W, the discharging power is 3000W, and the scheduling time is set from 10:00 to 17:00. The charging and discharging rules are as follows:
[0072] (1) When the remaining power of the electric vehicle is greater than 5kW·h, it can be discharged;
[0073] (2) When the remaining power of the electric vehicle is less than 5kW·h, charge until the power is not less than 10kW·h, and do not participate in discharge schedul...
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The invention discloses a distributed power equivalent method based on the discharge behavior of an electric vehicle, comprising the steps of: simulating and analyzing the travel behavior of the electric vehicle within a day, determining the location at each time; determining the charging and discharging rules of the electric vehicle, and combining the electric vehicle travel behavior, determine the charging and discharging status of electric vehicles at each time of the day; separately count the collection of electric vehicles discharged at each time at each location, and make it equivalent to a distributed power supply with varying output at each location, which is equivalent to a distributed power supply The output power at each moment is the total discharge power of electric vehicles at the location at that moment. Based on the travel behavior of electric vehicles, the discharge behavior of electric vehicles is equivalent in the form of distributed power, which can well reflect the discreteness and randomness of electric vehicles. The equivalent distributed power supply has the characteristics of flexible switching, which can provide power support for power supply in high-load areas and system network structure reconstruction, and has a wide range of application prospects.
Description
technical field [0001] This patent relates to the technical field of grid-connected electric vehicles, and specifically relates to an equivalent method for distributed power sources based on the discharge behavior of electric vehicles. Background technique [0002] The energy crisis and environmental pollution are becoming more and more serious, and the promotion of electric vehicles can effectively alleviate this crisis. With the continuous support of national policies for electric vehicles, the number of electric vehicles in the distribution network has increased year after year. In the charging mode, the electric vehicle can be regarded as a load connected to the distribution network. In the discharging mode, it can discharge to the urban distribution network system in a centralized manner with the help of the charging piles placed in the parking lots in various areas of the city. The overall access capacity of electric vehicles with centralized discharge is large, which...
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IPC IPC(8): H02J3/32B60L55/00B60L58/13H02J3/06
CPCH02J3/32B60L55/00B60L58/13H02J3/06Y02T10/70
Inventor 杨健维胡思洋廖凯何正友
Owner SOUTHWEST JIAOTONG UNIV