CN117239789A - Pile group three-phase balance control method and device - Google Patents
Pile group three-phase balance control method and device Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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Abstract
The invention relates to the technical field of charging piles, and provides a pile group three-phase balance control method and device, wherein the pile group comprises a plurality of three-phase charging piles, each three-phase charging pile is used for carrying out three-phase charging or single-phase charging on a charging object, and the method comprises the following steps: acquiring current of each phase of three-phase alternating current for supplying power to the pile group; determining a first phase, a second phase and a third phase in the three-phase alternating current according to the current of each phase of the three-phase alternating current; generating a commutation control instruction when the difference between the current of the first phase and the current of the second phase is greater than a preset threshold; after the three-phase charging pile to be charged receives the charging instruction, the first phase and the third phase of the three-phase charging pile to be charged are controlled to be phase-converted according to the phase-conversion control instruction, so that the input end of the first phase is connected with the output end of the third phase, and the input end of the third phase is connected with the output end of the first phase. The invention can automatically realize the three-phase load balance of the three-phase alternating current charging station.
Description
Technical Field
The invention relates to the technical field of charging piles, in particular to a pile group three-phase balance control method and a pile group three-phase balance control device.
Background
With the popularization of new energy automobiles, the requirements for charging piles are increasing, and the requirements for high-power charging are also increasing, so that the load balance of the three-phase alternating current charging station is very challenging. For three-phase electric car charging, the current of each phase is equal, so there is no special requirement for load balancing, and most of the vehicles on the market at present are still single-phase charging, when the station is compatible with three-phase charging and single-phase charging, and more vehicles are charged in the station in a single-phase manner, the load of one phase connected with the single-phase charging vehicle can far exceed the load of the other two phases. At present, aiming at the situation, most of the methods are to change the wire inlet mode of the charging piles, and the single-phase charging interfaces of a plurality of three-phase charging piles in a station are connected with different phase wires by installing a cross wiring mode, so that three-phase balance is realized. However, this approach is disadvantageous for the uniform wiring of the charging piles on the one hand, and on the other hand, there is a requirement for the location of the charging vehicle that a plurality of single-phase charging vehicles must relatively evenly connect the charging piles that provide different single-phase charging interfaces, which requires guiding the user, is inconvenient for the user to charge, and has poor user experience.
Disclosure of Invention
The invention aims to solve the technical problems, and provides a pile group three-phase balance control method and device, which can automatically realize three-phase load balance of a three-phase alternating current charging station, have no special requirements on wiring during installation of a three-phase charging pile, have no special requirements on a charging position of a user, and are simple and convenient to implement.
The technical scheme adopted by the invention is as follows:
a pile group three-phase balance control method, the pile group including a plurality of three-phase charging piles, each of the three-phase charging piles performing three-phase charging or single-phase charging on a charging object, the method comprising the steps of: acquiring current of each phase of three-phase alternating current for supplying power to the pile group; determining a first phase, a second phase and a third phase in the three-phase alternating current according to the current of each phase of the three-phase alternating current, wherein the current of the first phase is greater than or equal to the current of the second phase, and the current of the second phase is greater than or equal to the current of the third phase; generating a commutation control instruction when the difference between the current of the first phase and the current of the second phase is greater than a preset threshold; after the three-phase charging pile to be charged receives a charging instruction, the first phase and the third phase of the three-phase charging pile to be charged are controlled to be phase-converted according to the phase-conversion control instruction, so that the input end of the first phase is connected with the output end of the third phase, and the input end of the third phase is connected with the output end of the first phase.
And a switch is arranged between the input end and the three-phase output end of each phase of the three-phase charging pile, so that phase change between any two phases is realized through the switch.
In the three-phase charging pile, two single-pole double-throw switches are arranged corresponding to each phase, wherein the movable contact of a first single-pole double-throw switch is connected with the input end of the phase, the first fixed contact of the first single-pole double-throw switch is connected with the output end of the phase, the second fixed contact of the first single-pole double-throw switch is connected with the movable contact of a second single-pole double-throw switch, the first fixed contact of the second single-pole double-throw switch is connected with the output end of one of the other two phases, and the second fixed contact of the second single-pole double-throw switch is connected with the output end of the other one of the other two phases.
And a charging contactor is arranged at the front stage of the three-phase input end, and after the phase inversion of the first phase and the third phase of the three-phase charging pile to be charged is completed, the charging contactor is controlled to be closed so that the three-phase charging pile to be charged starts to charge.
The charging instruction is a single-phase charging instruction.
A pile group three-phase balance control device, the pile group including a plurality of three-phase charging piles, each of the three-phase charging piles performing three-phase charging or single-phase charging on a charging object, the device comprising: the acquisition module is used for acquiring the current of each phase of three-phase alternating current for supplying power to the pile group; the determining module is used for determining a first phase, a second phase and a third phase in the three-phase alternating current according to the magnitude of the current of each phase of the three-phase alternating current, wherein the current of the first phase is greater than or equal to the current of the second phase, and the current of the second phase is greater than or equal to the current of the third phase; the generation module generates a commutation control instruction when the difference between the current of the first phase and the current of the second phase is greater than a preset threshold value; and the control module is used for controlling the first phase and the third phase of the three-phase charging pile to be charged to be phase-changed according to the phase-change control instruction after the three-phase charging pile to be charged receives the charging instruction, so that the input end of the first phase is connected with the output end of the third phase, and the input end of the third phase is connected with the output end of the first phase.
And a switch is arranged between the input end and the three-phase output end of each phase of the three-phase charging pile, and the control module realizes phase change between any two phases by controlling the switch.
In the three-phase charging pile, two single-pole double-throw switches are arranged corresponding to each phase, wherein the movable contact of a first single-pole double-throw switch is connected with the input end of the phase, the first fixed contact of the first single-pole double-throw switch is connected with the output end of the phase, the second fixed contact of the first single-pole double-throw switch is connected with the movable contact of a second single-pole double-throw switch, the first fixed contact of the second single-pole double-throw switch is connected with the output end of one of the other two phases, and the second fixed contact of the second single-pole double-throw switch is connected with the output end of the other one of the other two phases.
And a charging contactor is arranged at the front stage of the three-phase input end, and the control module controls the charging contactor to be closed after the phase inversion of the first phase and the third phase of the three-phase charging pile to be charged is completed, so that the three-phase charging pile to be charged starts to charge.
The charging instruction is a single-phase charging instruction.
The invention has the beneficial effects that:
according to the invention, when the current of a certain phase is too high, the phase change control is carried out on the three-phase charging pile to be charged next, so that the three-phase load balance of the three-phase alternating current charging station can be automatically realized, no special requirements are imposed on wiring when the three-phase charging pile is installed, no special requirements are imposed on the charging position of a user, and the implementation is simple and convenient.
Drawings
FIG. 1 is a schematic diagram of the equipment connections of a three-phase AC charging station according to one embodiment of the present invention;
FIG. 2 is a flow chart of a pile group three-phase balance control method according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a switch structure for each phase in a three-phase charging pile according to an embodiment of the present invention;
fig. 4 is a block diagram of a pile group three-phase balance control device according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The pile group of the embodiment of the invention is positioned at a three-phase alternating current charging station, as shown in fig. 1, and comprises a plurality of three-phase charging piles, each three-phase charging pile is connected with a power distribution cabinet, the power distribution cabinet supplies power for the pile group, so that each three-phase charging pile is connected with three-phase power, and each three-phase charging pile can charge a charging object in a three-phase or single-phase manner. Each three-phase charging post may have one charging gun or may have a plurality of charging guns so as to be capable of simultaneously performing three-phase charging and/or single-phase charging for a plurality of charging subjects.
As shown in fig. 2, the pile group three-phase balance control method according to the embodiment of the invention includes the following steps:
s1, acquiring current of each phase of three-phase alternating current for supplying power to the pile group.
In one embodiment of the present invention, as shown in fig. 1, the current of each phase of the three-phase ac power for supplying the pile group may be obtained through a three-phase ac power meter connected to a power distribution cabinet, and the current of each phase may be transmitted to an energy controller.
S2, determining a first phase, a second phase and a third phase in the three-phase alternating current according to the current of each phase of the three-phase alternating current, wherein the current of the first phase is greater than or equal to the current of the second phase, and the current of the second phase is greater than or equal to the current of the third phase.
It should be understood that the first, second and third phases are used herein only to distinguish the order of magnitude of the current, and the first phase may be any one of the A, B, C phases, as may the second and third phases.
In the embodiment of the invention, when all three-phase charging piles of the whole three-phase alternating current charging station are used for carrying out single-phase charging on the charging objects, all the charging objects charged in the single phase are connected with the output end of the same phase, for example, all the charging objects charged in the single phase are connected with the output end of the phase A. When the three-phase ac charging station is operating normally, for example, when no abnormal condition such as current detection error or electric leakage occurs, it is indicated that the load of the first phase is large, that is, more electricity of the first phase is used for single-phase charging, and it is indicated that all charging objects of single-phase charging are connected to the output end of the first phase.
And S3, when the difference between the current of the first phase and the current of the second phase is larger than a preset threshold value, generating a phase-change control instruction.
The difference between the current of the first phase and the current of the second phase is greater than a preset threshold, which means that the difference between the current of the first phase and the current of the other two phases is greater than the preset threshold, and at the moment, the load of the first phase is too high, the three phases are unbalanced, and the subsequent phase change is needed to balance the three-phase load. The energy controller generates a commutation control command when the load of the first phase is determined to be too high in this way.
In one embodiment of the present invention, the preset threshold may be set according to the requirement for three-phase balance, for example, the preset threshold may be 30A in a specific embodiment.
And S4, after the three-phase charging pile to be charged receives the charging instruction, controlling the first phase and the third phase of the three-phase charging pile to be charged to be phase-converted according to the phase-conversion control instruction, so that the input end of the first phase is connected with the output end of the third phase, and the input end of the third phase is connected with the output end of the first phase.
The to-be-charged three-phase charging pile receiving the charging instruction is a three-phase charging pile to be charged, and the charging instruction can be generated by a gun or by clicking a start charging button by a user.
As shown in fig. 1, a phase-change controller is disposed in each three-phase charging pile, and the energy controller sends a phase-change control instruction to the phase-change controller in the three-phase charging pile to be charged so as to realize phase change in the three-phase charging pile.
In one embodiment of the invention, a switch is arranged between the input end and the three-phase output end of each phase of the three-phase charging pile, and the phase change controller controls the switch to realize phase change between any two phases.
In the three-phase charging pile, two single-pole double-throw switches can be arranged corresponding to each phase, wherein the movable contact of a first single-pole double-throw switch is connected with the input end of the phase, the first fixed contact of the first single-pole double-throw switch is connected with the output end of the phase, the second fixed contact of the first single-pole double-throw switch is connected with the movable contact of a second single-pole double-throw switch, the first fixed contact of the second single-pole double-throw switch is connected with the output end of one of the other two phases, and the second fixed contact of the second single-pole double-throw switch is connected with the output end of the other one of the other two phases.
Specifically, as shown in fig. 3, six single pole double throw switches S1 to S6 are provided in total between the input terminal and the output terminal of the three phases. Assuming that the first phase, the second phase and the third phase are L1, L2 and L3 respectively, and the Input end and the Output end of the first phase, the second phase and the third phase are Input L1 and Output L1, input L2 and Output L2, input L3 and Output L3 respectively, when the difference between the current of L1 and the current of L2 is not more than 30A, namely three-phase balance, in the three-phase charging pile to be charged, which receives a charging instruction, the phase change controller controls the S1, S2 and S3 to dial downwards, and the S4, S5 and S6 do not act, so that the Input end of each phase is correspondingly connected with the Output end of the phase; when the difference between the current of L1 and the current of L2 is larger than 30A, namely when the load of L1 is too high, the energy controller generates a commutation control instruction and sends the commutation control instruction to a three-phase charging pile to be charged, and in the three-phase charging pile to be charged, the commutation controller controls S1 to dial up, S4 to dial up, S2 to dial down, S3 to dial up and S6 to dial up, S5 does not act, so that Input L1 is connected with Output L3, input L3 is connected with Output L1, and commutation of L1 and L3 is realized. Thus, when the three-phase charging post to be charged performs single-phase charging on the charging object, the charging object of the single-phase charging does not add a load to the L1 with an excessively high load, but acts as a load of the L3 with the lowest load.
In other embodiments of the present invention, the switch for implementing phase inversion may take other forms, for example, two single pole single throw switches may be used to replace the single pole double throw switch described above, so long as phase inversion between any two phases can be implemented, which is not described in detail herein.
According to the embodiment of the invention, the phase change is realized through the switch, the circuit structure is simple, the occupied space is small, and the volume of the three-phase charging pile is not obviously increased.
In one embodiment of the invention, a charging contactor is arranged at the front stage of the three-phase input end, and after the phase inversion of the first phase and the third phase of the three-phase charging pile to be charged is completed, the charging contactor can be controlled to be closed so as to enable the three-phase charging pile to be charged to start the charging work. Therefore, the switch for realizing phase change is arranged at the rear stage of the charging contactor, or the switch for realizing phase change is arranged between the charging contactor and the output end, and the charging contactor is not closed before the phase change is completed, so that the switch is switched under the scene of no voltage and current during the phase change, and the safety can be improved.
In a preferred embodiment of the present invention, the charging command is a single-phase charging command. That is, the phase change may be performed after receiving the single-phase charging command, but not after receiving the three-phase charging command, thereby avoiding unnecessary switching and prolonging the switching life.
According to the pile group three-phase balance control method provided by the embodiment of the invention, through carrying out phase change control on the three-phase charging pile to be charged next when the current of a certain phase is too high, the three-phase load balance of the three-phase alternating current charging station can be automatically realized, no special requirements are imposed on wiring when the three-phase charging pile is installed, no special requirements are imposed on the charging position of a user, and the implementation is simple and convenient.
Corresponding to the pile group three-phase balance control method in the embodiment, the invention also provides a pile group three-phase balance control device.
As shown in fig. 4, the pile group three-phase balance control device according to the embodiment of the present invention includes an acquisition module 10, a determination module 20, a generation module 30, and a control module 40. The acquisition module 10 is used for acquiring the current of each phase of three-phase alternating current for supplying power to the pile group; the determining module 20 is configured to determine a first phase, a second phase and a third phase of the three-phase alternating current according to a magnitude of a current of each phase of the three-phase alternating current, where the current of the first phase is greater than or equal to the current of the second phase, and the current of the second phase is greater than or equal to the current of the third phase; the generation module 30 generates a commutation control instruction when the difference between the current of the first phase and the current of the second phase is greater than a preset threshold; after the three-phase charging pile to be charged receives the charging instruction, the control module 40 controls the first phase and the third phase of the three-phase charging pile to be charged to be phase-converted according to the phase-conversion control instruction, so that the input end of the first phase is connected with the output end of the third phase, and the input end of the third phase is connected with the output end of the first phase.
In one embodiment of the present invention, the obtaining module 10 may be a three-phase ac electric meter connected to the power distribution cabinet shown in fig. 1, and the determining module 20 and the generating module 30 may be integrated into the energy controller shown in fig. 1. The control module 40 may include the commutation controller shown in fig. 1.
The current of each phase of the three-phase alternating current for supplying power to the pile group can be obtained through the three-phase alternating current meter, and the current of each phase is sent to the energy controller.
It should be understood that the first, second, and third phases are merely used to distinguish the order of magnitude of the current, and that the first phase may be any one of the phases A, B, C, as may the second and third phases.
In the embodiment of the invention, when all three-phase charging piles of the whole three-phase alternating current charging station are used for carrying out single-phase charging on the charging objects, all the charging objects charged in the single phase are connected with the output end of the same phase, for example, all the charging objects charged in the single phase are connected with the output end of the phase A. When the three-phase ac charging station is operating normally, for example, when no abnormal condition such as current detection error or electric leakage occurs, it is indicated that the load of the first phase is large, that is, more electricity of the first phase is used for single-phase charging, and it is indicated that all charging objects of single-phase charging are connected to the output end of the first phase.
The difference between the current of the first phase and the current of the second phase is greater than a preset threshold, which means that the difference between the current of the first phase and the current of the other two phases is greater than the preset threshold, and at the moment, the load of the first phase is too high, the three phases are unbalanced, and the subsequent phase change is needed to balance the three-phase load. The energy controller generates a commutation control command when the load of the first phase is determined to be too high in this way.
In one embodiment of the present invention, the preset threshold may be set according to the requirement for three-phase balance, for example, the preset threshold may be 30A in a specific embodiment.
The to-be-charged three-phase charging pile receiving the charging instruction is a three-phase charging pile to be charged, and the charging instruction can be generated by a gun or by clicking a start charging button by a user.
In one embodiment of the invention, a switch is arranged between the input end and the three-phase output end of each phase of the three-phase charging pile, and the phase change controller controls the switch to realize phase change between any two phases.
In the three-phase charging pile, two single-pole double-throw switches can be arranged corresponding to each phase, wherein the movable contact of a first single-pole double-throw switch is connected with the input end of the phase, the first fixed contact of the first single-pole double-throw switch is connected with the output end of the phase, the second fixed contact of the first single-pole double-throw switch is connected with the movable contact of a second single-pole double-throw switch, the first fixed contact of the second single-pole double-throw switch is connected with the output end of one of the other two phases, and the second fixed contact of the second single-pole double-throw switch is connected with the output end of the other one of the other two phases.
Specifically, as shown in fig. 3, six single pole double throw switches S1 to S6 are provided in total between the input terminal and the output terminal of the three phases. Assuming that the first phase, the second phase and the third phase are L1, L2 and L3 respectively, and the Input end and the Output end of the first phase, the second phase and the third phase are Input L1 and Output L1, input L2 and Output L2, input L3 and Output L3 respectively, when the difference between the current of L1 and the current of L2 is not more than 30A, namely three-phase balance, in the three-phase charging pile to be charged, which receives a charging instruction, the phase change controller controls the S1, S2 and S3 to dial downwards, and the S4, S5 and S6 do not act, so that the Input end of each phase is correspondingly connected with the Output end of the phase; when the difference between the current of L1 and the current of L2 is larger than 30A, namely when the load of L1 is too high, the energy controller generates a commutation control instruction and sends the commutation control instruction to a three-phase charging pile to be charged, and in the three-phase charging pile to be charged, the commutation controller controls S1 to dial up, S4 to dial up, S2 to dial down, S3 to dial up and S6 to dial up, S5 does not act, so that Input L1 is connected with Output L3, input L3 is connected with Output L1, and commutation of L1 and L3 is realized. Thus, when the three-phase charging post to be charged performs single-phase charging on the charging object, the charging object of the single-phase charging does not add a load to the L1 with an excessively high load, but acts as a load of the L3 with the lowest load.
In other embodiments of the present invention, the switch for implementing phase inversion may take other forms, for example, two single pole single throw switches may be used to replace the single pole double throw switch described above, so long as phase inversion between any two phases can be implemented, which is not described in detail herein.
In one embodiment of the present invention, a charging contactor is disposed at a front stage of the three-phase input terminal, and the control module 40 may control the charging contactor to be closed after the phase inversion of the first phase and the third phase of the three-phase charging pile to be charged is completed, so that the three-phase charging pile to be charged starts the charging operation. Therefore, the switch for realizing phase change is arranged at the rear stage of the charging contactor, or the switch for realizing phase change is arranged between the charging contactor and the output end, and the charging contactor is not closed before the phase change is completed, so that the switch is switched under the scene of no voltage and current during the phase change, and the safety can be improved.
In a preferred embodiment of the present invention, the charging command is a single-phase charging command. That is, the phase change may be performed after receiving the single-phase charging command, but not after receiving the three-phase charging command, thereby avoiding unnecessary switching and prolonging the switching life.
According to the pile group three-phase balance control device provided by the embodiment of the invention, through carrying out phase change control on the three-phase charging pile to be charged next when the current of a certain phase is too high, the three-phase load balance of the three-phase alternating current charging station can be automatically realized, no special requirements are imposed on wiring when the three-phase charging pile is installed, no special requirements are imposed on the charging position of a user, and the implementation is simple and convenient.
In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements.
The order of execution of the steps illustrated in the flowcharts is a preferred implementation, and in other embodiments of the present invention, the functions involved in the steps may be adjusted, for example, may be executed simultaneously or in reverse order.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
Claims (10)
1. A pile group three-phase balance control method, wherein the pile group comprises a plurality of three-phase charging piles, each of the three-phase charging piles performs three-phase charging or single-phase charging on a charging object, the method comprising the steps of:
acquiring current of each phase of three-phase alternating current for supplying power to the pile group;
determining a first phase, a second phase and a third phase in the three-phase alternating current according to the current of each phase of the three-phase alternating current, wherein the current of the first phase is greater than or equal to the current of the second phase, and the current of the second phase is greater than or equal to the current of the third phase;
generating a commutation control instruction when the difference between the current of the first phase and the current of the second phase is greater than a preset threshold;
after the three-phase charging pile to be charged receives a charging instruction, the first phase and the third phase of the three-phase charging pile to be charged are controlled to be phase-converted according to the phase-conversion control instruction, so that the input end of the first phase is connected with the output end of the third phase, and the input end of the third phase is connected with the output end of the first phase.
2. The pile group three-phase balance control method according to claim 1, wherein a switch is arranged between an input end and a three-phase output end of each phase of the three-phase charging pile, so that phase change between any two phases is realized through the switch.
3. The method according to claim 2, wherein in the three-phase charging pile, two single-pole double-throw switches are provided corresponding to each phase, wherein a movable contact of a first single-pole double-throw switch is connected to an input end of the phase, a first fixed contact of the first single-pole double-throw switch is connected to an output end of the phase, a second fixed contact of the first single-pole double-throw switch is connected to a movable contact of a second single-pole double-throw switch, a first fixed contact of the second single-pole double-throw switch is connected to an output end of one of the other two phases, and a second fixed contact of the second single-pole double-throw switch is connected to an output end of the other two phases.
4. The pile group three-phase balance control method according to claim 2 or 3, wherein a charging contactor is arranged at a front stage of a three-phase input end, and after the phase conversion of the first phase and the third phase of the three-phase charging pile to be charged is completed, the charging contactor is controlled to be closed so that the three-phase charging pile to be charged starts charging work.
5. The pile group three-phase balance control method according to claim 1, wherein the charging command is a single-phase charging command.
6. A pile group three-phase balance control device, wherein the pile group includes a plurality of three-phase charging piles, each of the three-phase charging piles performs three-phase charging or single-phase charging on a charging object, the device comprising:
the acquisition module is used for acquiring the current of each phase of three-phase alternating current for supplying power to the pile group;
the determining module is used for determining a first phase, a second phase and a third phase in the three-phase alternating current according to the magnitude of the current of each phase of the three-phase alternating current, wherein the current of the first phase is greater than or equal to the current of the second phase, and the current of the second phase is greater than or equal to the current of the third phase;
the generation module generates a commutation control instruction when the difference between the current of the first phase and the current of the second phase is greater than a preset threshold value;
and the control module is used for controlling the first phase and the third phase of the three-phase charging pile to be charged to be phase-changed according to the phase-change control instruction after the three-phase charging pile to be charged receives the charging instruction, so that the input end of the first phase is connected with the output end of the third phase, and the input end of the third phase is connected with the output end of the first phase.
7. The pile group three-phase balance control device according to claim 6, wherein a switch is arranged between the input end and the three-phase output end of each phase of the three-phase charging pile, and the control module realizes phase change between any two phases by controlling the switch.
8. The pile group three-phase balance control device according to claim 7, wherein in the three-phase charging pile, two single-pole double-throw switches are arranged corresponding to each phase, wherein a movable contact of a first single-pole double-throw switch is connected with an input end of the phase, a first fixed contact of the first single-pole double-throw switch is connected with an output end of the phase, a second fixed contact of the first single-pole double-throw switch is connected with a movable contact of a second single-pole double-throw switch, a first fixed contact of the second single-pole double-throw switch is connected with an output end of one of the other two phases, and a second fixed contact of the second single-pole double-throw switch is connected with an output end of the other two phases.
9. The pile group three-phase balance control device according to claim 7 or 8, wherein a charging contactor is arranged at a front stage of a three-phase input end, and the control module controls the charging contactor to be closed after the phase change of the first phase and the third phase of the three-phase charging pile to be charged is completed, so that the three-phase charging pile to be charged starts charging work.
10. The pile group three-phase balance control device of claim 6, wherein the charging command is a single-phase charging command.
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147113A (en) * | 2017-06-05 | 2017-09-08 | 泰豪科技股份有限公司 | A kind of phase change method and device without phase fault |
| CN108400605A (en) * | 2018-01-16 | 2018-08-14 | 湖南四海中能电力科技有限公司 | A kind of charging power distribution control method and system with intelligent monitoring function |
| CN108512256A (en) * | 2018-06-14 | 2018-09-07 | 河北工业大学 | A kind of multifunctional vehicle mounted charge and discharge integral system |
| CN208715002U (en) * | 2018-07-13 | 2019-04-09 | 深圳新恒业电气有限公司 | It is suitable for the alternating-current charging pile device of heterogeneous output |
| CN109756010A (en) * | 2017-11-08 | 2019-05-14 | 浙江万马新能源有限公司 | For the three phase dynamic balance control method of one master and multiple slaves framework AC charging system |
| CN111098748A (en) * | 2020-01-14 | 2020-05-05 | 张翼洲 | Automatic voltage stabilization charging pile based on pre-balancing system |
| CN211508632U (en) * | 2020-01-23 | 2020-09-15 | 北京中清智辉能源科技有限公司 | Unbalanced three-phase commutation device and commutation system |
| CN211606116U (en) * | 2020-04-09 | 2020-09-29 | 西安兆孚电气科技股份有限公司 | Intelligent phase change switch switching circuit |
| DE102019134384A1 (en) * | 2019-12-13 | 2021-06-17 | Sma Solar Technology Ag | METHOD OF OPERATING A CHARGER FOR AN ELECTRIC VEHICLE, CHARGER FOR AN ELECTRIC VEHICLE, POWER SUPPLY SYSTEM WITH SUCH A CHARGER AND ENERGY MANAGEMENT DEVICE FOR USE IN THE METHOD |
| CN113459859A (en) * | 2021-08-23 | 2021-10-01 | 阳光电源股份有限公司 | New energy charging system, alternating-current charging pile and charging method thereof |
| CN113659595A (en) * | 2021-07-27 | 2021-11-16 | 国创移动能源创新中心(江苏)有限公司 | Three-phase balance control method and device of alternating current charging system |
| DE102020125540A1 (en) * | 2020-09-30 | 2022-03-31 | Schaeffler Technologies AG & Co. KG | Charging device for supplying electrical energy to connected electric vehicles |
| CN114362334A (en) * | 2020-10-13 | 2022-04-15 | 比亚迪股份有限公司 | Charging device and vehicle with same |
| EP4005860A1 (en) * | 2020-11-26 | 2022-06-01 | Zeta Specialist Lighting Limited | System and method for dynamic phase load balancing for electric vehicle chargers |
| CN116512966A (en) * | 2023-05-15 | 2023-08-01 | 万帮数字能源股份有限公司 | Pile power demand detection and redistribution method for charging station |
| CN116729179A (en) * | 2023-06-15 | 2023-09-12 | 天津平高易电科技有限公司 | Three-phase power balance adjustment method and multi-gun alternating-current charging pile |
-
2023
- 2023-11-13 CN CN202311499010.XA patent/CN117239789B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147113A (en) * | 2017-06-05 | 2017-09-08 | 泰豪科技股份有限公司 | A kind of phase change method and device without phase fault |
| CN109756010A (en) * | 2017-11-08 | 2019-05-14 | 浙江万马新能源有限公司 | For the three phase dynamic balance control method of one master and multiple slaves framework AC charging system |
| CN108400605A (en) * | 2018-01-16 | 2018-08-14 | 湖南四海中能电力科技有限公司 | A kind of charging power distribution control method and system with intelligent monitoring function |
| CN108512256A (en) * | 2018-06-14 | 2018-09-07 | 河北工业大学 | A kind of multifunctional vehicle mounted charge and discharge integral system |
| CN208715002U (en) * | 2018-07-13 | 2019-04-09 | 深圳新恒业电气有限公司 | It is suitable for the alternating-current charging pile device of heterogeneous output |
| DE102019134384A1 (en) * | 2019-12-13 | 2021-06-17 | Sma Solar Technology Ag | METHOD OF OPERATING A CHARGER FOR AN ELECTRIC VEHICLE, CHARGER FOR AN ELECTRIC VEHICLE, POWER SUPPLY SYSTEM WITH SUCH A CHARGER AND ENERGY MANAGEMENT DEVICE FOR USE IN THE METHOD |
| CN111098748A (en) * | 2020-01-14 | 2020-05-05 | 张翼洲 | Automatic voltage stabilization charging pile based on pre-balancing system |
| CN211508632U (en) * | 2020-01-23 | 2020-09-15 | 北京中清智辉能源科技有限公司 | Unbalanced three-phase commutation device and commutation system |
| CN211606116U (en) * | 2020-04-09 | 2020-09-29 | 西安兆孚电气科技股份有限公司 | Intelligent phase change switch switching circuit |
| DE102020125540A1 (en) * | 2020-09-30 | 2022-03-31 | Schaeffler Technologies AG & Co. KG | Charging device for supplying electrical energy to connected electric vehicles |
| CN114362334A (en) * | 2020-10-13 | 2022-04-15 | 比亚迪股份有限公司 | Charging device and vehicle with same |
| EP4005860A1 (en) * | 2020-11-26 | 2022-06-01 | Zeta Specialist Lighting Limited | System and method for dynamic phase load balancing for electric vehicle chargers |
| CN113659595A (en) * | 2021-07-27 | 2021-11-16 | 国创移动能源创新中心(江苏)有限公司 | Three-phase balance control method and device of alternating current charging system |
| CN113459859A (en) * | 2021-08-23 | 2021-10-01 | 阳光电源股份有限公司 | New energy charging system, alternating-current charging pile and charging method thereof |
| CN116512966A (en) * | 2023-05-15 | 2023-08-01 | 万帮数字能源股份有限公司 | Pile power demand detection and redistribution method for charging station |
| CN116729179A (en) * | 2023-06-15 | 2023-09-12 | 天津平高易电科技有限公司 | Three-phase power balance adjustment method and multi-gun alternating-current charging pile |
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