CN-122008939-A - Cross-cabinet power scheduling method, device and system applied to charging station

CN122008939ACN 122008939 ACN122008939 ACN 122008939ACN-122008939-A

Abstract

The application discloses a cross-cabinet power scheduling method, a cross-cabinet power scheduling device and a cross-cabinet power scheduling system applied to a charging station, wherein the cross-cabinet power scheduling method can be applied to the technical field of energy management of the charging station; the power management system comprises a first power cabinet, a second power cabinet, a dynamic schedulable power, a power distribution system and a power distribution system, wherein the first power cabinet is any power cabinet of a charging station, the second power cabinet is the rest power cabinets, the dynamic schedulable power is determined based on rated total power of the power cabinets, current load power and a safety margin adjusted according to the real-time state of an internal charging gun, the resource occupation priority of each second power cabinet is determined based on the dynamic schedulable power and peak power demand, and the power resource of the corresponding second power cabinet is called through a corresponding cross-cabinet contactor group according to the priority. The application improves the running stability and the power resource utilization rate of the charging station.

Inventors

ZHAO QINGLONG
MA CHUNYU
SU XIAOYU
LIU YOUHENG
Huang Yabiao
LI YILONG
ZHU JIANGUO

Assignees

永联科技(常熟)有限公司

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (11)

1. A cross-cabinet power scheduling method for a charging station, the charging station comprising a plurality of power cabinets and at least one cross-cabinet contactor set, each power cabinet comprising at least one charging gun, the cross-cabinet contactor set being connected between two charging guns of different power cabinets, the method comprising: When the current charging demand of a first power cabinet exceeds the rated total power of the first power cabinet, acquiring the dynamic schedulable power of at least one second power cabinet and the peak power demand of the second power cabinet in a future time window; the power control system comprises a plurality of power cabinets, a first power cabinet, a second power cabinet, a dynamic schedulable power, a power control unit and a power control unit, wherein the first power cabinet is any one of the plurality of power cabinets, and the second power cabinet is a power cabinet of the plurality of power cabinets except the first power cabinet; Determining a resource occupancy priority for each second power cabinet based on the dynamically schedulable power and the peak power demand of the at least one second power cabinet; and according to the resource occupation priority of each second power cabinet, calling the power resource of the corresponding second power cabinet through the corresponding cross-cabinet contactor group.
2. The method of claim 1, wherein said obtaining dynamically schedulable power of at least one second power cabinet comprises: According to the real-time charging state of each charging gun in the second power cabinet, respectively determining independent safety margins of each charging gun; Calculating the total safety margin of the second power cabinet according to the independent safety margin of each charging gun and the priority weight of each charging gun; Determining the dynamic schedulable power of the second power cabinet according to the rated total power of the second power cabinet, the current load power and the total safety margin.
3. The method of claim 2, wherein the determining the independent safety margin of each charging gun according to the real-time charging state of each charging gun in the second power cabinet comprises: For each charging gun in the second power cabinet, acquiring a basic safety margin of the charging gun; Acquiring at least one risk coefficient of a charging stage risk coefficient, a state of charge risk coefficient, a battery temperature risk coefficient and a voltage risk coefficient of the charging gun; And correcting the basic safety margin according to the at least one risk coefficient to obtain the independent safety margin of the charging gun.
4. The method of claim 2, wherein calculating the total safety margin of the second power cabinet based on the independent safety margin of each charging gun and the priority weight of the corresponding charging gun comprises: according to the priority weights of the charging guns, carrying out weighted summation on the independent safety margins to obtain candidate safety margins; selecting a target safety margin from the candidate safety margin and the bottom protection safety margin of the second power cabinet, wherein the target safety margin is larger than the safety margin which is not selected from the candidate safety margin and the bottom protection safety margin; based on the target safety margin and a system level safety margin, a total safety margin of the second power cabinet is determined.
5. The method of claim 1, wherein obtaining peak power demand of the second power cabinet over a future time window comprises: Based on the current charging stage of each charging gun in the second power cabinet, respectively adopting a corresponding power prediction model to predict a power change curve of each charging gun in the future time window; Determining predicted power values of each charging gun at a plurality of time points within the future time window according to the power time-varying curve of each charging gun; for each time point in the future time window, calculating the total predicted power of the second power cabinet at the time point according to the predicted power value, the charging stage correction coefficient and the environmental factor correction coefficient of each charging gun at the time point; and determining the peak power requirement of the second power cabinet in the future time window according to the total predicted power of the second power cabinet in each time point in the future time window.
6. The method of claim 5, wherein the method further comprises: for each time point in the future time window, determining the charging stage correction coefficient corresponding to the time point according to the number of charging guns expected to be newly connected at the time point and the number of charging guns expected to be charged to be ended at the time point in the second power cabinet; and determining the environmental factor correction coefficient corresponding to each charging gun at the time point according to the temperature of the battery connected with each charging gun in the second power cabinet.
7. The method according to claim 1, wherein the method further comprises: When the first power cabinet occupies the power resources of at least one second power cabinet and the current charging demand of the first power cabinet is smaller than or equal to the rated total power of the first power cabinet, the rated total power, the current load rate and the peak power demand in a future time window of each occupied second power cabinet are obtained; For each second power cabinet that is occupied, determining a resource release priority for the second power cabinet based on the total power rating, the current load factor, and the peak power demand of the second power cabinet; And according to the resource release priority of each occupied second power cabinet, releasing the power resource of the corresponding second power cabinet through the corresponding cross-cabinet contactor group.
8. The method according to claim 1, wherein the method further comprises: Receiving a resource release request sent by a second power cabinet occupying power resources by the first power cabinet, wherein the resource release request is sent by the second power cabinet when the current charging demand of the second power cabinet exceeds the power which is not occupied by a cross cabinet in the rated total power of the second power cabinet; and responding to the resource release request, and releasing the occupied power resource of the second power cabinet.
9. The method according to claim 7 or 8, characterized in that the method further comprises: after the calling or releasing of the power resource is executed, triggering a second power cabinet to which the called or released power resource belongs to enter a busy state, so that the power resource of the second power cabinet is forbidden to be called across cabinets in a preset time period from the moment when the calling or releasing of the power resource is executed.
10. A cross-cabinet power dispatching apparatus for a charging station, the charging station comprising a plurality of power cabinets and at least one cross-cabinet contactor set, each power cabinet comprising at least one charging gun, the cross-cabinet contactor set being connected between two charging guns of different power cabinets, the apparatus comprising: The information acquisition module is used for acquiring the dynamic schedulable power of at least one second power cabinet and the peak power demand of the second power cabinet in a future time window when the current charging demand of the first power cabinet exceeds the rated total power of the first power cabinet; the power control system comprises a plurality of power cabinets, a first power cabinet, a second power cabinet, a dynamic schedulable power, a power control unit and a power control unit, wherein the first power cabinet is any one of the plurality of power cabinets, and the second power cabinet is a power cabinet of the plurality of power cabinets except the first power cabinet; A priority determining module for determining a resource occupancy priority for each second power cabinet based on the dynamically schedulable power and the peak power demand of the at least one second power cabinet; and the resource calling module is used for calling the power resource of the corresponding second power cabinet through the corresponding cross-cabinet contactor group according to the resource occupation priority of each second power cabinet.
11. A cross-cabinet power scheduling system for a charging station, comprising: a plurality of power cabinets, each power cabinet including at least one charging gun; At least one cabinet-spanning contactor set connected between two charging guns of different power cabinets; A plurality of power control units in one-to-one correspondence with the plurality of power cabinets, the plurality of power control units being communicatively coupled therebetween, each of the power control units being operatively coupled to a cabinet-crossing contactor set of a charging gun coupled to the power cabinet in which it is located and configured to perform the method of any one of claims 1 to 9.

Description

Cross-cabinet power scheduling method, device and system applied to charging station Technical Field The application relates to the technical field of energy management of charging stations, in particular to a cross-cabinet power scheduling method, device and system applied to charging stations. Background With the vigorous development of the new energy automobile industry, the construction scale of charging infrastructures is continuously enlarged, and the requirements of users on charging speed, efficiency and service experience are increasingly improved. As a core carrier of the charging network, the charging station not only needs to meet the basic requirement of rapid energy supplement of vehicles, but also needs to realize efficient utilization of energy and stable operation of the system under a complex operation scene. The existing charging station is generally composed of a plurality of integral charging piles or split power cabinets, wherein each power cabinet is internally provided with a plurality of power modules and is used for serving a single or a plurality of charging guns. In actual operation, the current situation that resources of each power cabinet are independently managed is limited, the situation that part of charging guns cannot meet the instantaneous high-power requirement of a vehicle due to insufficient available power of the power cabinet where the charging guns are located, so that the charging rate is limited is frequently caused, meanwhile, after the charging guns meet the requirement of the vehicle, the power cabinet where the charging guns are located still has surplus power, so that the module runs idle or runs under low load, power waste is formed, and the overall power utilization rate of a station is difficult to improve. In order to solve the above problems, the prior art proposes a concept of cross-cabinet power scheduling, namely, resource mutual-match among different power cabinets is realized through means such as a matrix switch or a contactor. However, in an actual charging scenario, the power requirements of the vehicle battery in different charging phases (such as constant current and constant voltage phases) show a dynamic trend, and the starting and stopping of a plurality of charging guns and power adjustment in the charging station also have randomness. When the existing cross-cabinet scheduling scheme is used for decision, the judgment and the distribution are generally carried out only according to the available power of the called cabinet at the current moment. When the charging load is changed drastically, the static and responsive scheduling mode easily causes fluctuation of the output power of the system, even causes interruption or deceleration of charging, and is difficult to ensure the overall operation stability of the station while meeting the multi-gun charging requirement. Disclosure of Invention In order to solve the problems in the prior art, the embodiment of the application provides a cross-cabinet power scheduling method, device and system applied to a charging station. The technical scheme is as follows: In one aspect, there is provided a cross-cabinet power scheduling method applied to a charging station comprising a plurality of power cabinets each comprising at least one charging gun and at least one cross-cabinet contactor set connected between two charging guns of different power cabinets, the method comprising: When the current charging demand of a first power cabinet exceeds the rated total power of the first power cabinet, acquiring the dynamic schedulable power of at least one second power cabinet and the peak power demand of the second power cabinet in a future time window; the power control system comprises a plurality of power cabinets, a first power cabinet, a second power cabinet, a dynamic schedulable power, a power control unit and a power control unit, wherein the first power cabinet is any one of the plurality of power cabinets, and the second power cabinet is a power cabinet of the plurality of power cabinets except the first power cabinet; Determining a resource occupancy priority for each second power cabinet based on the dynamically schedulable power and the peak power demand of the at least one second power cabinet; and according to the resource occupation priority of each second power cabinet, calling the power resource of the corresponding second power cabinet through the corresponding cross-cabinet contactor group. In another aspect, there is provided a cross-cabinet power dispatching apparatus for a charging station, the charging station comprising a plurality of power cabinets and at least one cross-cabinet contactor set, each power cabinet comprising at least one charging gun, the cross-cabinet contactor set being connected between two charging guns of different power cabinets, the apparatus comprising: The information acquisition module is used for acquiring the dynamic schedulable power of at least one secon