CN114301100A - Charging pile ordered charging method, system, device and medium considering multiple distribution transformer combined control - Google Patents

Charging pile ordered charging method, system, device and medium considering multiple distribution transformer combined control Download PDF

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CN114301100A
CN114301100A CN202210046249.0A CN202210046249A CN114301100A CN 114301100 A CN114301100 A CN 114301100A CN 202210046249 A CN202210046249 A CN 202210046249A CN 114301100 A CN114301100 A CN 114301100A
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transformer
transformers
charging
capacity
value
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赵小楠
王智东
周星月
王金阳
陈瑞源
黄思泳
杨玲
张紫凡
张勇军
肖君
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South China University of Technology SCUT
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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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/126—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12—Remote or cooperative charging
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

The invention discloses a charging pile ordered charging method, system, device and medium considering multiple distribution transformer combined control, wherein the method comprises the following steps: carrying out parallel connection processing on a plurality of transformers, wherein the connection group number of each transformer is the same; monitoring a real-time load value of a power supply area; and determining the number of the transformers which are put into operation according to the real-time load value so that the efficiency of each transformer is greater than a preset efficiency threshold value. According to the invention, the parallel transformer supplies power to the charging pile, so that the capacity of the transformer is not required to be improved, and the cost is saved; in addition, the number of the transformers which are put into operation is adjusted according to the load size, so that the transformers which are put into operation work at high efficiency, the spare capacity is reduced, and the operation economy is improved. The invention can be widely applied to the technical field of electric vehicle charging.

Description

Charging pile ordered charging method, system, device and medium considering multiple distribution transformer combined control
Technical Field
The invention relates to the technical field of electric vehicle charging, in particular to a charging pile ordered charging method, system, device and medium considering multiple distribution transformer combined control.
Background
In recent years, electric vehicles are widely used due to the characteristics of low carbon, environmental protection and convenience, and the requirements of charging piles are increased. Along with fill electric pile's wide application, the platform district distribution transform appears easily and uses not enough problem.
Fill electric pile at present and insert a distribution network transformer basically, supply power by a distribution network transformer, the problem of power supply deficiency appears easily, in order to avoid charging simultaneously when many electric automobile, causes the not enough problem of capacity of transformer, current solution is: increasing the capacity of the transformer increases the hardware cost and can make the transformer work inefficiently most of the time.
Disclosure of Invention
In order to solve at least one of the technical problems in the prior art to a certain extent, the invention aims to provide a charging pile ordered charging method, system, device and medium considering the joint control of a plurality of distribution transformers.
The technical scheme adopted by the invention is as follows:
a charging pile ordered charging method considering multiple distribution transformer combined control comprises the following steps:
carrying out parallel connection processing on a plurality of transformers, wherein the connection group number of each transformer is the same;
monitoring a real-time load value of a power supply area;
and determining the number of the transformers which are put into operation according to the real-time load value so that the efficiency of each transformer is greater than a preset efficiency threshold value.
Further, the number of the parallel-connected transformers is determined by the following method:
acquiring a load maximum value of a power supply area, and acquiring the total capacity of the transformer according to the load maximum value and a preset capacity residual value;
and acquiring the number of the transformers connected in parallel according to the total capacity of the transformers.
Further, the capacity values of different transformers are different;
the number of the transformers connected in parallel meets the following relation:
Figure BDA0003468341540000011
wherein the content of the first and second substances,
Figure BDA0003468341540000012
for the capacity of each transformer, StrFor the capacity of all transformers, SimaxThe capacity of the transformer with the maximum capacity in the plurality of transformers.
Further, the cost of the transformers with different capacity values is different, and the total cost of all the transformers is smaller than the preset cost value.
Further, the determining the number of transformers put into operation according to the real-time load value includes:
determining the output power of the transformer according to the real-time load value;
according to the maximum value beta of the output power and the preset transformer load factornaxAnd a predetermined efficiency threshold η of the transformerminAcquiring the number of transformers needing to be put into operation;
wherein the load factor of each transformer put into operationβiIs less than or equal to betamaxEfficiency η of each transformer put into operationiGreater than or equal to the efficiency threshold ηmin。
Further, the load factor of the transformer is expressed as:
Figure BDA0003468341540000021
Figure BDA0003468341540000022
wherein, IiIs the load current of the ith transformer, INiIs the rated current of the ith transformer, ZkiShort-circuit impedance of the ith transformer, I total load current,
Figure BDA0003468341540000023
is IiThe vector of (a) is determined,
Figure BDA0003468341540000024
is a vector of I.
Furthermore, when a plurality of transformers are connected in parallel, the variation ratio deviation is not more than +/-0.5%, and the per unit value of the short-circuit impedance is not more than +/-10%.
The other technical scheme adopted by the invention is as follows:
an orderly charging system of a charging pile considering a plurality of distribution transformer combined control comprises:
the circuit design module is used for carrying out parallel connection processing on a plurality of transformers, and the connection group number of each transformer is the same;
the load monitoring module is used for monitoring the real-time load value of the power supply area;
and the operation adjusting module is used for determining the number of the transformers which are put into operation according to the real-time load value so as to enable the efficiency of each transformer to be larger than a preset efficiency threshold value.
The other technical scheme adopted by the invention is as follows:
an orderly charging device of stake of charging of considering a plurality of distribution transformer joint control includes:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, cause the at least one processor to implement the method described above.
The other technical scheme adopted by the invention is as follows:
a computer readable storage medium in which a processor executable program is stored, which when executed by a processor is for performing the method as described above.
The invention has the beneficial effects that: according to the invention, the parallel transformer supplies power to the charging pile, so that the capacity of the transformer is not required to be improved, and the cost is saved; in addition, the number of the transformers which are put into operation is adjusted according to the load size, so that the transformers which are put into operation work at high efficiency, the spare capacity is reduced, and the operation economy is improved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description is made on the drawings of the embodiments of the present invention or the related technical solutions in the prior art, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solutions of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart illustrating steps of a charging pile ordered charging method considering a plurality of distribution transformer combined controls according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Interpretation of terms:
connection group number: the connection group numbers indicate the phase relation of the phase voltages of the high-voltage winding and the low-voltage winding and the phase relation of the line voltages; the number of the connection group is determined according to the homonymous terminals of the high-voltage winding and the low-voltage winding and the connection method.
Variation ratio deviation: the transformation ratio deviation delta k represents the deviation of the transformation ratio of the two transformers, and the calculation formula is as follows:
Figure BDA0003468341540000041
where i, j is 1,2,3 … …, n (i, j denotes the i, j th transformer in parallel, kiRepresenting the transformation ratio, k, of the ith transformerjRepresenting the transformation ratio of the jth transformer, n being the total number of transformers connected in parallel).
Short circuit impedance per unit value: per unit value is equal to actual value/reference value, short circuit impedance per unit value is equal to short circuit voltage per unit value ukThe calculation formula is as follows:
Figure BDA0003468341540000042
distribution and transformation: distribution transformers, referred to as "distribution transformers", are static electrical appliances that transform ac voltage and current to transmit ac power in an electrical distribution system according to the law of electromagnetic induction.
A platform area: in an electrical power system, a transformer area refers to the supply range or area of a (single) transformer.
The load factor of the transformer is as follows: the ratio of the apparent power of the average output of the transformer to the rated capacity of the transformer in a certain time. The average load factor of the load curve is multiplied by a factor greater than 1, the higher the average load factor of the load curve.
As shown in fig. 1, the present embodiment provides a method for orderly charging a charging pile considering multiple distribution transformer combined controls, including the following steps:
and S1, carrying out parallel connection processing on a plurality of transformers, wherein the connection group number of each transformer is the same.
In this embodiment, the parallel operation of the transformers requires that the numbers of the connection groups of the transformers are the same, the ratio variation (not more than-0.5%, + 0.5%) is strictly controlled, the per unit values of the short-circuit impedances cannot differ too much (not more than-10%, + 10%), and the impedance angles may differ to some extent.
The charging piles controlled by the distribution transformer in a combined mode are charged orderly, and the following contents need to be considered: firstly, the economy is realized, and the number of the parallel transformers is considered; secondly, the number of the transformers which are put into operation is adjusted according to the load size, so that each transformer works on the load which is close to the highest efficiency. The specific contents are as follows:
1) number of transformers connected in parallel with a plurality of distribution transformers
The number n of the transformers connected in parallel with the distribution transformer can be the same or different, for example, the transformers with different capacity value steps are arranged, and the number of the transformers can be flexibly regulated according to actually increased loads.
Under the condition of a certain total capacity, the cost of a single transformer and the reliability factor of power supply should be comprehensively considered. The specific formula is as follows:
Figure BDA0003468341540000051
∑Ci≤C (2)
Figure BDA0003468341540000052
with respect to the formula (1),
Figure BDA0003468341540000053
denotes the capacity (i ═ 1,2,3, …, n) of the ith transformer, StrRepresenting the total transformer capacity (which should be greater than the maximum value of the power supply area access load (capacity)). For equation (2), the inequality indicates that the total cost of the transformer should be less than the expected cost, CiThe cost of the ith transformer is shown, C is the expected cost, and C is a constant and can be preset. For equation (3), the inequality indicates that the total capacity of the remaining parallel transformers should still be greater than the maximum load in the power supply area, assuming that the transformer with the largest capacity in the parallel transformer bank fails; simaxRepresents the capacity of the largest transformer among the parallel transformers,
Figure BDA0003468341540000054
representing the maximum value of the load of the supply area.
And S2, monitoring the real-time load value of the power supply area.
The real-time load value of the power supply area is collected in real time, and the real-time load value can be obtained through the intelligent electric meter. In some embodiments, the load value on the power supply area is detected in real time by setting a detection period (such as 1 second), for example, the detection period may be changed, such as in a time period in which power is frequently used every day, the detection supplement is reduced, that is, the detection period is small; and in the time period with less electricity, the detection period is increased.
And S3, determining the number of transformers which are put into operation according to the real-time load value, so that the efficiency of each transformer is greater than a preset efficiency threshold value.
About charging stake access charging at a certain moment, the transformer number of putting into operation specifically as follows:
1) the total number of the transformers connected in parallel is a, the number of the ith transformers which are put into operation is i, the number of the transformers which are put into operation is n (n < ═ a), the total number of charging piles for supplying power to the transformers is m, and the number of the jth charging piles is j (j < ═ m).
The number i of the transformers put into operation meets the following conditions:
Figure BDA0003468341540000055
βi≤βmax (5)
ηi≥ηmin (6)
wherein, for the formula (4),
Figure BDA0003468341540000057
represents the output power of the i-th transformer,
Figure BDA0003468341540000056
the electric automobile load of the jth charging pile is represented, the left side of the equal sign represents the total output power of the transformer connected at the moment t, and the right side of the equal sign represents the total electric automobile load of the charging pile at the moment t. For equation (5), βiRepresents the load factor, beta, of the ith transformermaxRepresents the maximum value of the transformer load factor; for equation (6), ηiIs shown asThe efficiency of the i transformers is such that eta should be guaranteed for each transformer to operate at a load close to the highest efficiencyiGreater than ηminThereby reducing the spare capacity and improving the running economy; in this embodiment, ηmin＝0.95。
2) Distribution of transformer load for a specific
n transformers are operated in parallel, and the load current I of the ith transformeriComprises the following steps:
Figure BDA0003468341540000061
n transformers are operated in parallel, and the load factor beta of the ith transformeriComprises the following steps:
Figure BDA0003468341540000062
wherein, IiIs the load current of the ith transformer, INiIs the rated current of the ith transformer, ZkiShort-circuit impedance of the ith transformer, I total load current,
Figure BDA00034683415400000611
is IiThe vector of (a) is determined,
Figure BDA00034683415400000612
is a vector of I.
The above-described method is explained in detail below with reference to specific examples.
In the power supply region, the total charging load of the platform vehicle is t1
Figure BDA0003468341540000063
Number n of transformers to be put into operation1Ith transformer capacity
Figure BDA0003468341540000064
Load factor betai1And a load at t1 of
Figure BDA0003468341540000065
Efficiency is etai1. At this time, the following formula is satisfied:
Figure BDA0003468341540000066
Figure BDA0003468341540000067
βi1≤βmax (11)
ηi1≥0.95 (12)
wherein, i is 1,2, … …, n1。ZkiIs the short-circuit impedance of the ith transformer, I1Total load current at t1, Ii1Load current of I-th transformer at t1, INiThe rated current of the ith transformer.
Then, when the charging or the disconnection of the charging of the vehicle is started at time t2, the total load of the platform vehicle becomes
Figure BDA0003468341540000068
And detecting the load condition in real time, analyzing according to the load condition, and adjusting the number of the transformers which are put into operation by the formulas (13) to (16) to ensure that the transformers work at the working points with high efficiency and the efficiency of the transformers which are put into operation is more than 95 percent.
Figure BDA0003468341540000069
Figure BDA00034683415400000610
βi2≤βmaX (15)
ηi2≥0.95 (16)
Wherein, i is 1,2, … …, n2。ZkiIs the short-circuit impedance of the ith transformer, I2Total load current at t1, Ii2Load current of I-th transformer at t1, INiThe rated current of the ith transformer.
In summary, compared with the prior art, the present embodiment has the following beneficial effects:
(1) according to the embodiment of the invention, the parallel transformer is used for supplying power to the charging pile, so that the capacity of the transformer is not required to be improved, and the cost is saved.
(2) The embodiment of the invention provides a method for determining the number of parallel transformers, which is simple and can limit the cost of configuring the transformers and ensure the reliability of power supply. In addition, when a transformer breaks down, other parallel transformers can be allocated to supply power to the charging pile in time, and the safety is high.
(3) The embodiment of the invention adjusts the number of the transformers which are put into operation according to the load size, thereby leading the transformers which are put into operation to work with higher efficiency, reducing the spare capacity and improving the economical efficiency of operation.
(4) According to the embodiment of the invention, a plurality of transformers are connected in parallel for supplying power without rectification (alternating current is converted into direct current), so that the engineering quantity is reduced.
The embodiment also provides a charging pile ordered charging system considering a plurality of distribution transformer combined control, which includes:
the circuit design module is used for carrying out parallel connection processing on a plurality of transformers, and the connection group number of each transformer is the same;
the load monitoring module is used for monitoring the real-time load value of the power supply area;
and the operation adjusting module is used for determining the number of the transformers which are put into operation according to the real-time load value so as to enable the efficiency of each transformer to be larger than a preset efficiency threshold value.
The charging pile ordered charging system considering the joint control of the multiple distribution transformers can execute the charging pile ordered charging method considering the joint control of the multiple distribution transformers, can execute any combination of implementation steps of the method embodiments, and has corresponding functions and beneficial effects of the method.
The embodiment also provides a charging pile ordered charging device considering a plurality of distribution transformer combined control, which comprises:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, cause the at least one processor to implement the method as shown in fig. 1.
The charging pile ordered charging device considering the joint control of the multiple distribution transformers can execute the charging pile ordered charging method considering the joint control of the multiple distribution transformers, can execute any combination of implementation steps of the method embodiments, and has corresponding functions and beneficial effects of the method.
The embodiment of the application also discloses a computer program product or a computer program, which comprises computer instructions, and the computer instructions are stored in a computer readable storage medium. The computer instructions may be read by a processor of a computer device from a computer-readable storage medium, and executed by the processor to cause the computer device to perform the method illustrated in fig. 1.
The embodiment also provides a storage medium, which stores instructions or programs capable of executing the charging pile ordered charging method considering the multiple distribution and transformation combined control provided by the method embodiment of the invention, and when the instructions or the programs are run, the steps can be implemented in any combination of the method embodiment, so that the method has corresponding functions and beneficial effects.
In alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flow charts of the present invention are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and in which sub-operations described as part of larger operations are performed independently.
Furthermore, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the described functions and/or features may be integrated in a single physical device and/or software module, or one or more functions and/or features may be implemented in a separate physical device or software module. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary for an understanding of the present invention. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be understood within the ordinary skill of an engineer, given the nature, function, and internal relationship of the modules. Accordingly, those skilled in the art can, using ordinary skill, practice the invention as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the invention, which is defined by the appended claims and their full scope of equivalents.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. 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.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A charging pile ordered charging method considering multiple distribution transformer combined control is characterized by comprising the following steps:
carrying out parallel connection processing on a plurality of transformers, wherein the connection group number of each transformer is the same;
monitoring a real-time load value of a power supply area;
and determining the number of the transformers which are put into operation according to the real-time load value so that the efficiency of each transformer is greater than a preset efficiency threshold value.
2. The method for charging the charging pile in order by considering the joint control of the distribution transformer and the transformation substation as claimed in claim 1, wherein the number of the transformers connected in parallel is determined by the following method:
acquiring a load maximum value of a power supply area, and acquiring the total capacity of the transformer according to the load maximum value and a preset capacity residual value;
and acquiring the number of the transformers connected in parallel according to the total capacity of the transformers.
3. The method for charging the charging pile in order by considering the joint control of the distribution transformers as claimed in claim 2, wherein the capacity values of different transformers are different;
the number of the transformers connected in parallel meets the following relation:
Figure FDA0003468341530000011
Figure FDA0003468341530000012
wherein the content of the first and second substances,
Figure FDA0003468341530000013
for the capacity of each transformer, StrFor the capacity of all transformers, SimaxThe capacity of the transformer with the maximum capacity in the plurality of transformers.
4. The method as claimed in claim 3, wherein the cost of the transformers with different capacity values is different, and the total cost of all the transformers is less than a preset cost value.
5. The method for charging the charging pile in order by considering the joint control of the distribution transformer and the distribution transformer as claimed in claim 1, wherein the determining the number of the transformers which are put into operation according to the real-time load value comprises:
determining the output power of the transformer according to the real-time load value;
according to the maximum value beta of the output power and the preset transformer load factormaxAnd a predetermined efficiency threshold η of the transformerminAcquiring the number of transformers needing to be put into operation;
wherein the load factor beta of each transformer put into operationiIs less than or equal to betamaxEfficiency η of each transformer put into operationiGreater than or equal to the efficiency threshold ηmin。
6. The method as claimed in claim 5, wherein the load factor of the transformer is expressed as:
Figure FDA0003468341530000014
Figure FDA0003468341530000021
wherein, IiIs the load current of the ith transformer, INiIs the rated current of the ith transformer, ZkiShort-circuit impedance of the ith transformer, I total load current,
Figure FDA0003468341530000022
is IiThe vector of (a) is determined,
Figure FDA0003468341530000023
is a vector of I.
7. The method as claimed in claim 1, wherein when a plurality of transformers are connected in parallel, the variation ratio is not more than ± 0.5%, and the per unit value of the short-circuit impedance is not more than ± 10%.
8. A charging pile ordered charging system considering a plurality of distribution transformer combined control is characterized by comprising:
the circuit design module is used for carrying out parallel connection processing on a plurality of transformers, and the connection group number of each transformer is the same;
the load monitoring module is used for monitoring the real-time load value of the power supply area;
and the operation adjusting module is used for determining the number of the transformers which are put into operation according to the real-time load value so as to enable the efficiency of each transformer to be larger than a preset efficiency threshold value.
9. An orderly charging device of electric pile that fills who considers a plurality of distribution transformer joint control, its characterized in that includes:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, cause the at least one processor to implement the method of any one of claims 1-7.
10. A computer-readable storage medium, in which a program executable by a processor is stored, wherein the program executable by the processor is adapted to perform the method according to any one of claims 1 to 7 when executed by the processor.
CN202210046249.0A 2022-01-13 2022-01-13 Charging pile ordered charging method, system, device and medium considering multiple distribution transformer combined control Pending CN114301100A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101976849A (en) * 2010-09-30 2011-02-16 山东计保电气有限公司 Method and device for intelligently switching on and off transformer set
CN105006870A (en) * 2015-08-21 2015-10-28 中国人民解放军96657部队 Charging pile intelligent power distribution system and method thereof
CN106980932A (en) * 2017-03-23 2017-07-25 广州供电局有限公司 Transformer maximum load rate ranging assessments method and system
CN108988400A (en) * 2018-07-03 2018-12-11 中国科学院广州能源研究所 Power distribution method and electronic equipment for multi-machine parallel connection electric power electric transformer
CN109980783A (en) * 2019-03-27 2019-07-05 国网北京市电力公司 Distribution transformer monitoring device and load access management system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101976849A (en) * 2010-09-30 2011-02-16 山东计保电气有限公司 Method and device for intelligently switching on and off transformer set
CN105006870A (en) * 2015-08-21 2015-10-28 中国人民解放军96657部队 Charging pile intelligent power distribution system and method thereof
CN106980932A (en) * 2017-03-23 2017-07-25 广州供电局有限公司 Transformer maximum load rate ranging assessments method and system
CN108988400A (en) * 2018-07-03 2018-12-11 中国科学院广州能源研究所 Power distribution method and electronic equipment for multi-machine parallel connection electric power electric transformer
CN109980783A (en) * 2019-03-27 2019-07-05 国网北京市电力公司 Distribution transformer monitoring device and load access management system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
付国宏: "电子电力变压器并联运行与能量管理", 《中国优秀硕士论文电子期刊网》, 15 June 2019 (2019-06-15), pages 25 - 48 *

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