CN109818354B - Charging pile group control terminal control method and group control terminal - Google Patents
Charging pile group control terminal control method and group control terminal Download PDFInfo
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Abstract
The invention discloses a charging pile group control terminal control method and a group control terminal, and relates to the technical field of charging pile group control, wherein the method comprises the steps of collecting a switch state signal, a charging machine charging power demand fed back by a matrix controller and a power distribution condition of the matrix controller; analyzing information fed back by the acquisition unit and the control execution unit, and generating a switch control strategy corresponding to the switch state signal; and performing on-off control on the switch according to the control strategy. The technical scheme of the invention breaks through the mutual influence constraint of a large number of charging piles accessed to the power distribution network, and realizes the access of a large number of charging piles to the existing power distribution network under the condition of no capacity increase.
Description
Technical Field
The invention relates to the technical field of charging pile group control, in particular to a charging pile group control terminal control method and a charging pile group control terminal.
Background
With the vigorous construction of electric vehicles and charging facilities matched with the electric vehicles, the problems of low utilization rate of a charger terminal, high capacity increasing cost of a power distribution network and the like are increasingly highlighted. All charging modules of a main current charger adopt a centralized control mode, a fixed charging module serves the corresponding charger, a required value can be obtained from an electric vehicle BMS to realize dynamic adjustment of output power, but the problems of low utilization rate of charging equipment when the required power of the electric vehicle is too low and insufficient charging capacity when the required power of the electric vehicle is too high exist. Therefore, a charging pile group control technology is developed, different powers can be automatically extracted from the centralized charging module according to actual needs of different types of electric vehicles, the charging requirements of the electric vehicles with different energy storage capacities and different charging multiplying powers are met, and meanwhile the conversion efficiency and the utilization rate of charging equipment are further improved. However, the existing charging pile group control technology still needs to provide enough power redundancy on the distribution network side, great difficulty is brought to the transformation of the power distribution network of an old cell, and the problem of high capacity increasing cost of the power distribution network cannot be solved, so that a novel charging pile intelligent group control terminal is urgently needed.
Disclosure of Invention
In view of the above defects in the prior art, the invention aims to provide a charging pile group control terminal control method and a charging pile group control terminal, so that mutual influence constraint of a large number of charging piles connected to a power distribution network is broken through, the connection of a large number of charging piles to the power distribution network is realized under the condition of no capacity increase of the existing power distribution network, the problem of high capacity increase cost of the power distribution network is solved, and the utilization rate of a charger terminal is further improved.
One of the objectives of the present invention is to provide a method for controlling a charging pile group control terminal, the method comprising,
collecting a switch state signal, a charger charging power demand fed back by a matrix controller and a power distribution condition of the matrix controller;
analyzing the collected switch state signal, the charging power requirement of a charger, the power distribution condition and control information fed back by a control execution unit, and generating a switch control strategy corresponding to the switch state signal;
and performing on-off control on the switch according to the control strategy.
Optionally, the control strategy includes:
obtaining a distribution transformer with the largest redundant load;
controlling the switch of the group control terminal, and connecting the distribution transformer with the maximum redundant load into all chargers;
monitoring the load condition of a charger and the electrical parameters of a power switch cabinet, and disconnecting all switches and displaying faults when the faults are determined; and starting load dynamic allocation when the fact that no fault occurs and the redundancy rate of the distribution transformer with the largest redundant load is lower than a threshold value is determined.
Optionally, the control strategy further includes:
when the situation that no fault occurs and the redundancy rate of the distribution transformer with the largest redundant load is not lower than a threshold value is determined, monitoring the load condition of a charger and the electrical parameters of the power switch cabinet; and
and when the dynamic allocation is determined to be completed, monitoring the load condition of the charger and the electrical parameters of the power switch cabinet, and if the dynamic allocation is not completed, disconnecting all switches and displaying faults.
Optionally, the load dynamic allocation includes balanced allocation;
the balanced allocation comprises the following steps:
according to the redundant load of the distribution transformer and the charging demand sum of a charger, calculating the load value which is evenly distributed by each distribution transformer on average;
when the difference value of the existing load and the newly-shared load of any distribution transformer is lower than a load threshold value, the charger is divided into a plurality of groups through a switch;
grouping conditions are met, and one or more chargers with load mean values close to or equal to the load values evenly distributed by each distribution transformer are grouped;
when the difference value of the existing load and the newly-shared load of any distribution transformer is not lower than the load threshold value, the grouping condition is met, the reset average value of the distribution transformer maximum redundant load total value distributed to each charger is calculated, the charger load is set as the reset average value through the cooperation of the flexible charging piles, and the grouping is carried out according to the distribution transformer maximum redundant load.
Optionally, the load dynamic allocation includes proportional allocation;
the proportion distribution comprises the following steps:
calculating the redundant load ratio of each distribution transformer;
calculating the sum of the charging demands according to the redundant load ratio to obtain the charging demand of a new charger;
when the difference value of the existing load and the newly-shared load of any distribution transformer is lower than a load threshold value, dividing the charger into a plurality of groups according to the charging requirement and the maximum redundant load of each distribution transformer;
and when the difference value of the existing load and the newly-shared load of any distribution transformer is not lower than the load threshold value, calculating the maximum redundant load total value of each distribution transformer according to the redundant load ratio to obtain a redundant charging demand, and grouping the chargers according to the redundant charging demand and the maximum redundant load of each distribution transformer by matching of the flexible charging piles.
Optionally, the preferentially allocating includes the following steps: the load dynamic allocation comprises preferential allocation;
the preferential allocation comprises the following steps:
respectively sequencing all chargers from large to small according to charging requirements to obtain a charging requirement queue; sequencing the distribution transformers from large to small according to the maximum redundant load to obtain a redundant load queue;
distributing the most front charger in the redundant load queue to the most front distribution transformer in the charging demand queue;
when the former distribution transformer in the charging demand queue reaches the upper accommodation limit, the former distribution transformer is distributed to the next distribution transformer in the charging demand queue until the tail of the charging demand queue is distributed with a charger;
after the chargers in the redundant load queue are distributed each time, the next charger needs to try to be distributed to the distribution transformer at the front of the charging demand queue, and if the next charger cannot be accommodated, the next charger tries to be distributed backwards in sequence;
if any charger cannot be distributed with a proper distribution transformer, the total value of the charging requirements is reduced through the cooperation of the flexible charging stacks, and the steps are repeated until all the chargers are grouped.
The invention also provides a charging pile group control terminal, which comprises an acquisition unit, a control execution unit and an information fusion and decision unit;
the acquisition unit is used for acquiring a switch state signal, a charger charging power demand fed back by the matrix controller and a power distribution condition of the matrix controller;
the information fusion and decision unit is used for fusing information fed back by the analysis acquisition unit and the control execution unit, finishing the action decision of the switch corresponding to the switch state signal and issuing an action command to the control execution unit;
the control execution unit is connected to the information fusion and decision unit and is used for executing the action command and controlling the switch to be opened and closed.
Optionally, the switch includes a main switch module and a matrix switch module, both the main switch module and the matrix switch module include a controllable switch device and a switch branch, and the control execution unit is configured to execute the action as a command to perform on-off control on the controllable switch devices of the main switch module and the matrix switch module.
Optionally, the group control terminal is further provided with an external interface, the external interface is used for information transmission with the power switch cabinet and the flexible charging stack, the power switch cabinet is arranged between the low-voltage side of the distribution transformer and the main switch module, and the acquisition unit is further used for receiving the voltage, the current and the power signals fed back by the power switch cabinet through the external interface.
Optionally, the group control terminal includes N main switch modules, where N is greater than or equal to 1, N corresponds to the number of ac busbars, N × M matrix switch modules, where M is greater than or equal to 1, M corresponds to the number of chargers, any one of the matrix switch modules includes N input ends and one output end, the N input ends of any one of the matrix switch modules are respectively disposed on the corresponding ac busbars, and the output end of each of the matrix switch modules is connected to the corresponding charger of the flexible charging stack.
Due to the adoption of the technical scheme, the invention has the following advantages:
according to the technical scheme, the mutual influence constraint of a large number of charging piles connected to the power distribution network is broken through, the connection of a large number of charging piles to the existing power distribution network is realized under the condition of no capacity increase, the problem of high capacity increase cost of the power distribution network is solved, and the utilization rate of the charger terminal is further improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
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The drawings of the invention are illustrated as follows:
FIG. 1 is a schematic flow diagram of the process of the present invention;
fig. 2 is a block diagram of a charging pile group control terminal according to the present invention;
fig. 3 is a schematic diagram of a control of a group control terminal of a charging pile according to the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
The first embodiment of the invention provides a charging pile group control terminal control method, which comprises the following steps:
collecting a switch state signal, a charger charging power demand fed back by a matrix controller and a power distribution condition of the matrix controller;
analyzing the information acquired by the acquisition unit and the information fed back by the control execution unit, and generating a switch control strategy corresponding to the switch state signal;
and performing on-off control on the switch according to the control strategy.
As shown in fig. 1, the control strategy includes:
screening out the distribution transformer with the maximum redundant load according to the redundant load of each distribution transformer;
controlling a switch of a group control terminal to connect the distribution transformer to all chargers, wherein the switch of the group control terminal comprises a main switch module and a matrix switch module;
monitoring the load condition of a charger and the electrical parameters of a power switch cabinet, judging whether a fault occurs, and disconnecting all switches and displaying the fault if the fault occurs;
if the fault does not occur, judging whether the redundancy of the distribution transformer is lower than a redundancy threshold value, if not, continuing to monitor in real time, and if so, starting dynamic load allocation;
and judging whether the dynamic allocation is finished or not, if so, returning to a real-time monitoring state, and if not, disconnecting all switches and displaying faults.
Specifically, the above scheme may be described as that after a charging pile intelligent group control terminal based on a power distribution network capacity time-sharing multiplexing strategy is started, a maximum one is determined according to the maximum redundant load of each distribution transformer, all chargers are connected by controlling a main switch module and a matrix switch module, the load condition of the chargers and the electrical parameter condition of a power switch cabinet are monitored in real time, if a fault occurs, all switches are switched off emergently and the fault is displayed, if the redundancy of a certain distribution transformer is lower than a threshold value X, dynamic allocation is started, whether dynamic allocation is completed is determined, if the dynamic allocation is completed, execution is performed and the real-time monitoring state is returned, and if the redundancy is not completed, all switches are switched off emergently and.
Wherein the dynamic blending comprises the following steps: and judging the power load working conditions of the distribution transformers in different periods, if the redundancy of a certain distribution transformer is lower than a threshold value X, starting dynamic allocation, and realizing grouping through the main switch module and the matrix switch module.
The allocation method in this embodiment includes, but is not limited to, balanced allocation, proportional allocation, and priority allocation.
The three blending methods are described below
The balanced allocation comprises the following steps:
according to the redundant load of the distribution transformer and the charging demand sum of a charger, calculating the load value which is evenly distributed by each distribution transformer on average;
judging whether the difference value of the existing load and the newly-shared load of any distribution transformer is lower than a load threshold value or not;
if the load is lower than the load threshold, the charger is divided into a plurality of groups through the main switch module and the matrix switch module;
grouping conditions are met, and one or more chargers with load mean values close to or equal to the load values evenly distributed by each distribution transformer are grouped;
if the load is not lower than the load threshold, the grouping condition is met, the reset mean value of the distribution transformer maximum redundant load total value distributed to each charger is calculated, the flexible charging stacks are matched, the charger load is set as the reset mean value, and grouping is carried out according to the distribution transformer maximum redundant load.
Specifically, the balanced distribution is to calculate the load value W which is averagely and evenly distributed by each distribution transformer according to the redundant load of the distribution transformer and the charging demand sum of a charger;
if the load value of each distribution transformer after subtracting the newly-allocated load value is still lower than the load threshold value Y, dividing the chargers into N groups through the main switch module and the matrix switch module if the load value of each distribution transformer is lower than the load threshold value Y, and taking one or more chargers with the average value close to or equal to W as one group;
if the average value is not lower than the maximum redundancy load of the distribution transformer, calculating a mean value V of the distribution transformer to be distributed to each charger, reserving a certain margin when the maximum redundancy load of the distribution transformer is calculated, matching through a flexible charging pile, setting the load of the charger to be a reset mean value V, reserving an original value for the charger lower than the reset mean value V, and dividing the chargers into N groups according to the maximum redundancy load of the distribution transformer.
The proportion allocation comprises the following steps:
calculating the redundant load ratio of each distribution transformer;
calculating the sum of the charging demands according to the redundant load ratio to obtain the charging demand of a new charger;
dividing the chargers into a plurality of groups according to the charging requirements and the maximum redundant load of each distribution transformer;
judging whether the difference value of the existing load and the newly-shared load of any distribution transformer is lower than a load threshold value or not, and if the difference value is lower than the load threshold value, adopting the grouping scheme;
and if the total value of the maximum redundant load of each distribution transformer is not lower than the load threshold value, calculating the total value of the maximum redundant load of each distribution transformer according to the redundant load ratio to obtain a redundant charging demand, and grouping the chargers according to the redundant charging demand and the maximum redundant load of each distribution transformer by matching of the flexible charging piles.
Specifically, the proportional distribution is according to a certain proportional value Z, the proportional value can be the ratio of the redundant loads of all distribution transformers, then the charging demand sum is calculated according to the proportional value Z to obtain a new charging demand A of the charger, the charging demand A is divided into N groups according to the maximum redundant loads of all distribution transformers, and if the current load of each distribution transformer is still lower than a threshold value Y after the newly-allocated load value is subtracted from the current load of each distribution transformer, the method can be implemented; and if the total maximum redundant load value of each distribution transformer is not lower than the threshold value Y, calculating the total maximum redundant load value of each distribution transformer according to the proportional value Z, reserving a certain margin when calculating the total maximum redundant load value of each distribution transformer, obtaining a redundant charging demand B of a new charger, matching through the flexible charging pile, and dividing the charger into N groups according to the maximum redundant load of each distribution transformer according to the redundant charging demand B.
The preferential allocation comprises the following steps:
respectively sequencing all chargers from large to small according to charging requirements to obtain a charging requirement queue;
sequencing all distribution transformers from large to small according to the maximum redundant load to obtain a redundant load queue;
distributing the most front charger in the redundant load queue to the most front distribution transformer in the charging demand queue;
when the former distribution transformer in the charging demand queue reaches the upper accommodation limit, the former distribution transformer is distributed to the next distribution transformer in the charging demand queue until the tail of the charging demand queue is distributed with a charger;
after the chargers in the redundant load queue are distributed each time, the next charger needs to try to be distributed to the distribution transformer at the front of the charging demand queue, and if the next charger cannot be accommodated, the next charger tries to be distributed backwards in sequence;
if any charger cannot be distributed with a proper distribution transformer, the total value of the charging requirements is reduced through the cooperation of the flexible charging stacks, and the steps are repeated until all the chargers are grouped.
Specifically, the preferential distribution is to sort the chargers from large to small according to the charging requirements, wherein the queue is a charging requirement queue C, the distribution transformers are sorted from large to small according to the maximum redundant load, the queue is a redundant load queue D, the charger at the forefront in the queue D is distributed to the distribution transformer at the forefront in the queue C in sequence, and when the distribution transformer at the forefront in the queue C cannot be accommodated, the charger is distributed to the distribution transformer at the next position in sequence until the last position in the queue C is reached in sequence; after each distribution in the team D, the next charger needs to try to distribute to the distribution transformer with redundant space at the top, and if the next charger cannot accommodate the distribution transformer, the next charger sequentially tries downwards; if any charger cannot be allocated with a proper distribution transformer, the total value E to F of the charging demand is reduced through the matching of the flexible charging stacks, the F can be set according to the proportion or the average value or a fixed value, and the process is repeated until all the chargers are allocated to the N groups.
As shown in fig. 2, a second embodiment of the present invention provides a charging pile group control terminal, which includes a main switch module, a matrix switch module and a group controller;
the main switch module and the matrix switch module are respectively arranged at two sides of an alternating current bus, the main switch module is connected to the high-voltage side alternating current bus through a distribution transformer, and the matrix switch module is arranged at one side of a group control terminal connected with the flexible charging pile;
the cluster controller comprises an acquisition unit, a control execution unit and an information fusion and decision unit;
the acquisition unit is used for acquiring switching state signals of the main switch module and the matrix switch module, charging power requirements of a charger fed back by the matrix controller and power distribution conditions of the matrix controller, and the matrix controller is arranged in the flexible charging stack;
the information fusion and decision unit is used for fusing information fed back by the analysis acquisition unit and the control execution unit, completing action decision of the main switch module and the matrix switch module, and issuing an action command to the control execution unit;
the control execution unit is connected to the information fusion and decision unit and used for executing the action command so as to control the opening and closing of the main control module and the matrix switch module.
Specifically, in this embodiment, the ac bus is composed of a plurality of ac lines for transmitting ac energy, the main switch module and the matrix switch module are composed of a controllable switch device and a switch branch, the main switch module and the matrix switch module are connected to each switch branch through the controllable switch device, the controllable switch device includes a contactor or a relay, the controllable switch device is used for executing a control command, and the switch branch is used for feeding back a switch state signal of the switch branch to the acquisition unit and simultaneously executing a command issued by the control execution unit.
On the basis of the foregoing embodiment, in another embodiment of the present invention, the group control terminal further includes a power conversion unit and an interface display unit, the power conversion unit is configured to supply power to each unit and module of the charging pile intelligent group control terminal, the interface display unit is configured to display an operation state of the group control terminal and human-computer interaction of the group control terminal, and the human-computer interaction includes functions of instruction information entry, history download, and the like.
The group control terminal is further provided with an external interface, the external interface is used for carrying out information transmission with the power switch cabinet and the flexible charging pile, the power switch cabinet is arranged between the low-voltage side of the distribution transformer and the main switch module, the acquisition unit is further used for receiving voltage, current and power signals fed back by the power switch cabinet through the external interface, more accurate control can be achieved through acquiring the voltage, current and power signals fed back by the power switch cabinet, and the utilization rate of the charger terminal is further improved.
In another embodiment of the present invention, as shown in fig. 3, the scheme of the present invention is described with reference to an actual situation, and the whole set of group control system of the charging pile includes a high-voltage side dc bus, a distribution transformer, a power switch cabinet, a charging pile group control terminal, a flexible charging pile, and an electric vehicle.
The high-voltage side alternating current bus transmits electric energy to a power switch cabinet through a distribution transformer, the power switch cabinet comprises a power switch cabinet monitoring terminal which is used for monitoring the state of the power switch cabinet and uploading relevant parameters, the power switch cabinet is connected to a charging pile group control terminal, the group control terminal comprises a main switch module and a plurality of alternating current buses, one main switch module corresponds to one alternating current bus, the outgoing line of the alternating current bus is connected to a matrix switch module, the switching state signals of the main switch module and the matrix switch module are connected to a group controller, the outgoing line of the charging pile group control terminal is connected to a flexible charging pile, the flexible charging pile comprises a power distribution area, a direct current bus and a charging terminal group which are sequentially connected, the charging terminal group is connected to an electric automobile to charge the electric automobile, and a matrix controller is arranged in the flexible charging pile, the matrix controller also inserts the signal into the cluster controller to satisfy the cluster controller and can gather the charging parameter in the flexible charging pile.
In this embodiment, as shown in fig. 3, it is assumed that N distribution transformers are provided, M corresponding charger modules are provided, and the charging pile group control terminal includes 1 group controller, N alternating current buses, N main switch modules, and N × M matrix switch modules, where N is greater than or equal to 1, and M is greater than or equal to 1. Each main switch module comprises an input port and an output port, the input port of each main switch module is respectively connected with one side of a breaker of a distribution transformer in the corresponding power switch cabinet, and each output port is respectively connected with the corresponding alternating current bus; each matrix switch module comprises N input ports and an output port, the input ports of the matrix switch modules are respectively connected with the corresponding alternating current buses, and the output ports are connected with the corresponding charger modules in the flexible charging stacks. Each main switch module and each matrix switch module comprise a controllable switch device and a switch branch, the main switch modules and the matrix switch modules are connected with the switch branches through the controllable switch devices, and the controllable switch devices comprise contactors or relays.
The main switch module mainly selects the distribution transformers to be put into, and the matrix switch module mainly selects the groups of the chargers and accesses the corresponding distribution transformers. For example, there are A, B, C distribution transformers, the number of the charger is 1, 2, 3, 4, 5, 6, the main switch module is MK1, MK2, MK3, the matrix switch module is JK11, JK12.. JK16, J21, j22.. J26, J31, j32.. J36, that is, the matrix JK, the access is 1, 2, 4, the access is a, 3, 5, the access is B, 6, the access is C, the access is open according to 0, the access is closed according to the grouping condition, there are:
MK＝[1 1 1]
for another example, there are A, B, C distribution transformers, and there are chargers 1, 2, 3, 4, 5, and 6, then the main switch modules are MK1, MK2, and MK3, respectively, the matrix switch modules are JK11, JK12.. JK16, J21, j22.. J26, J31, and j32.. J36, and according to the dynamic allocation, the groups are access a, 3 access C, and distribution transformer B is not connected, charger 6 is not connected, and according to 0, the charger is disconnected, 1 is closed, and according to the grouping situation, there are:
MK＝[1 0 1]
on the basis of the embodiment, the main control module and the matrix switch module are designed in a modularized standard mode and produced in batches, so that the standardization of products is facilitated, the output expansion of the power switch cabinet can be realized, the system compatibility is strong, the production cost and the maintenance cost of the products can be effectively reduced, and the installation and the maintenance are convenient.
The intelligent cluster controller is connected with the switch cabinet monitoring terminal, the main switch module, the matrix switch module and the matrix controller in one or more modes of wireless communication such as Bluetooth, sound wave, WiFi and LTE and wired communication such as PLC, RS485, RS232 and CAN. The intelligent cluster controller preferentially adopts a CAN communication bus to communicate with the main switch module and the matrix light-emitting module. The intelligent cluster controller preferentially adopts RS485 communication with the switch cabinet monitoring terminal and the matrix controller.
Those skilled in the art should understand that, in order to ensure the implementation of the present invention, the charging pile intelligent group control terminal related to the implementation of the present invention may further optionally include some necessary structures such as a communication channel, a wiring system, a protection device, and the like, and further optionally include an exhaust device, a cable bridge, a monitoring system, an alarm system, a lighting device, a fire protection system, and the like, which are not described herein again.
The charging system breaks through the mutual influence constraint of a large number of charging piles connected into the power distribution network, realizes the connection of a large number of charging piles in the existing power distribution network under the condition of no capacity increase, solves the problem of high capacity increase cost of the power distribution network, and further improves the utilization rate of a charger terminal; the invention can be widely applied to charging facility construction and power distribution network transformation.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (6)
1. A method for controlling a group control terminal of a charging pile is characterized in that the method comprises the following steps,
collecting a switch state signal, a charger charging power demand fed back by a matrix controller and a power distribution condition of the matrix controller;
analyzing the collected switch state signal, the charging power requirement of a charger, the power distribution condition and control information fed back by a control execution unit, and generating a switch control strategy corresponding to the switch state signal;
controlling the switch to be opened or closed according to the control strategy;
the control strategy comprises the following steps:
obtaining a distribution transformer with the largest redundant load;
controlling the switch of the group control terminal, and connecting the distribution transformer with the maximum redundant load into all chargers;
monitoring the load condition of a charger and the electrical parameters of a power switch cabinet, and disconnecting all switches and displaying faults when the faults are determined; when the situation that no fault occurs and the redundancy rate of the distribution transformer with the largest redundant load is lower than a threshold value is determined, starting dynamic load allocation;
the control strategy further comprises:
when the situation that no fault occurs and the redundancy rate of the distribution transformer with the largest redundant load is not lower than a threshold value is determined, monitoring the load condition of a charger and the electrical parameters of the power switch cabinet; and
when the dynamic allocation is determined to be completed, monitoring the load condition of a charger and the electrical parameters of the power switch cabinet, and if the dynamic allocation is not completed, disconnecting all switches and displaying faults;
the load dynamic allocation comprises balanced allocation;
the balanced allocation comprises the following steps:
according to the redundant load of the distribution transformer and the charging demand sum of a charger, calculating the load value which is evenly distributed by each distribution transformer on average;
when the difference value of the existing load and the newly-shared load of any distribution transformer is lower than a load threshold value, the charger is divided into a plurality of groups through a switch;
grouping conditions are met, and one or more chargers with load mean values close to or equal to the load values evenly distributed by each distribution transformer are grouped;
when the difference value of the existing load and the newly-shared load of any distribution transformer is not lower than the load threshold value, the grouping condition is met, the reset average value of the distribution transformer maximum redundant load total value distributed to each charger is calculated, the charger load is set as the reset average value through the cooperation of the flexible charging piles, and the grouping is respectively carried out according to the distribution transformer maximum redundant load.
2. The method of claim 1, wherein the dynamic load allocation comprises proportional allocation;
the proportion distribution comprises the following steps:
calculating the redundant load ratio of each distribution transformer;
calculating the sum of the charging demands according to the redundant load ratio to obtain the charging demand of a new charger;
when the difference value of the existing load and the newly-shared load of any distribution transformer is lower than a load threshold value, dividing the charger into a plurality of groups according to the charging requirement and the maximum redundant load of each distribution transformer;
when the difference value of the existing load and the newly shared load of any distribution transformer is not lower than the load threshold value, the maximum redundant load total value of each distribution transformer is calculated according to the redundant load ratio to obtain a redundant charging demand, and the chargers are respectively grouped according to the redundant charging demand and the maximum redundant load of each distribution transformer through the cooperation of the flexible charging piles.
3. The method of claim 1, wherein the dynamic load allocation comprises a priority allocation;
the preferential allocation comprises the following steps:
respectively sequencing all chargers from large to small according to charging requirements to obtain a charging requirement queue; sequencing the distribution transformers from large to small according to the maximum redundant load to obtain a redundant load queue;
distributing the most front charger in the redundant load queue to the most front distribution transformer in the charging demand queue;
when the former distribution transformer in the charging demand queue reaches the upper accommodation limit, the former distribution transformer is distributed to the next distribution transformer in the charging demand queue until the tail of the charging demand queue is distributed with a charger;
after the chargers in the redundant load queue are distributed each time, the next charger needs to try to be distributed to the distribution transformer at the front of the charging demand queue, and if the next charger cannot be accommodated, the next charger tries to be distributed backwards in sequence;
if any charger cannot be distributed with a proper distribution transformer, the total value of the charging requirements is reduced through the cooperation of the flexible charging stacks, and the steps are repeated until all the chargers are grouped.
4. A charging pile group control terminal is characterized by comprising an acquisition unit, a control execution unit and an information fusion and decision unit;
the acquisition unit is used for acquiring a switch state signal, a charger charging power demand fed back by the matrix controller and a power distribution condition of the matrix controller;
the information fusion and decision unit is used for fusing information fed back by the analysis acquisition unit and the control execution unit, finishing the action decision of the switch corresponding to the switch state signal and issuing an action command to the control execution unit;
the control execution unit is connected to the information fusion and decision unit and is used for executing the action command and controlling the switch to be opened and closed;
the group control terminal comprises N main switch modules, wherein N is larger than or equal to 1, N corresponds to the number of alternating current buses, N is multiplied by M matrix switch modules, M is larger than or equal to 1, M corresponds to the number of chargers, any matrix switch module comprises N input ends and one output end, the N input ends of any matrix switch module are respectively arranged on the corresponding alternating current buses, and the output end of each matrix switch module is connected to the corresponding charger of the flexible charging pile.
5. The charging pile group control terminal according to claim 4, wherein the switch comprises a main switch module and a matrix switch module, the main switch module and the matrix switch module both comprise controllable switch devices and switch branches, and the control execution unit is configured to execute the action command to control the controllable switch devices of the main switch module and the matrix switch module to be turned on and off.
6. The charging pile group control terminal according to claim 5, wherein the group control terminal is further provided with an external interface, the external interface is used for information transmission with a power switch cabinet and the flexible charging pile, the power switch cabinet is arranged between a low-voltage side of a distribution transformer and a main switch module, and the acquisition unit is further used for receiving voltage, current and power signals fed back by the power switch cabinet through the external interface.
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| CN110347204B (en) * | 2019-07-17 | 2020-06-26 | 石家庄通合电子科技股份有限公司 | Contactor control algorithm for power distribution of annular bus |
| CN111835072B (en) * | 2020-07-31 | 2022-11-22 | 北京兴达智联科技有限公司 | Power exchange cabinet with dynamic current distribution function and charging method |
| CN112104048B (en) * | 2020-09-29 | 2021-09-24 | 深圳市骑换科技有限公司 | Charging and battery-replacing cabinet control system with charger scheduling function |
| CN115782667B (en) * | 2023-02-08 | 2023-04-28 | 云南丁旺科技有限公司 | Method and system for distributing capacitance for charging pile |
| CN118074198A (en) * | 2024-04-22 | 2024-05-24 | 江苏华骋科技有限公司 | Intelligent self-adaptive integrated charging and discharging system |
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| CN105610218B (en) * | 2016-01-22 | 2018-02-27 | 石家庄科林电气股份有限公司 | A kind of control method for coordinating of electric automobile intelligent charge |
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