CN111193301B

CN111193301B - Charging regulation and control method, system, computer equipment and readable storage medium

Info

Publication number: CN111193301B
Application number: CN201911223632.3A
Authority: CN
Inventors: 徐敏
Original assignee: Evergrande Hengchi New Energy Automobile Research Institute Shanghai Co Ltd
Current assignee: Evergrande Hengchi New Energy Automobile Research Institute Shanghai Co Ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2021-08-13
Anticipated expiration: 2039-12-04
Also published as: CN111193301A

Abstract

The invention provides a charging regulation and control method, which comprises the steps of determining the maximum acceptable current value of charging equipment, obtaining a community power network topology, a first safe current value of a loop switch in the community power network topology and a safe current value of a transformer, and determining the safe current value of the loop switch directly connected with the charging equipment according to the community power network topology, the first safe current value of the loop switch and the safe current value of the transformer; and determining the charging current of the charging equipment according to the safe current value of the loop switch directly connected with the charging equipment and the maximum acceptable current value of the charging equipment. The charging regulation and control method can maximize the sum of the charging currents of the charging equipment, and improves the utilization efficiency of energy. The invention also provides a charging regulation and control system, a computer readable storage medium and computer equipment.

Description

Charging regulation and control method, system, computer equipment and readable storage medium

Technical Field

The invention relates to the technical field of community intelligent charging, in particular to a charging regulation and control method, a charging regulation and control system, computer equipment and a readable storage medium.

Background

At present, the hardware composition of the community network mainly relates to three types of hardware equipment, namely a transformer, a loop switch and charging equipment, wherein the transformer is connected with the loop switch, and the loop switch is directly or indirectly connected with the charging equipment. At present, the endurance mileage of the electric automobile is generally low, the vehicle charging in the community needs to be carried out by using the charging pile more frequently so as to meet the endurance requirement, but because the charging pile in the community and the residential electricity utilization common power line are adopted, when the residential electricity utilization is more, the community does not have enough power load, so that the user cannot use the charging pile to charge the electric automobile or the current distributed by the electric automobile is not appropriate, and the charging time is too long.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a charging regulation and control method for enabling a charging device to output maximum current through charging regulation and control, and also provides a charging regulation and control system, a computer device and a readable storage medium.

In order to realize the purpose, the following technical scheme is adopted:

in a first aspect, the present invention provides a charging regulation method, including:

determining the maximum acceptable current value of charging equipment, acquiring a community power network topology, a first safe current value of a loop switch and a safe current value of a transformer in the community power network topology, and determining the safe current value of the loop switch directly connected with the charging equipment according to the community power network topology, the first safe current value of the loop switch and the safe current value of the transformer;

and determining the charging current of the charging equipment according to the safe current value of the loop switch directly connected with the charging equipment and the maximum acceptable current value of the charging equipment.

Further, the method further comprises:

encoding the transformer, the loop switch, and the charging device in the community power network topology to construct the community power network topology.

Further, the encoding the transformer, the loop switch, and the charging device in the community power network topology to construct the community power network topology comprises:

encoding the transformer;

coding the loop switch according to the coding of the transformer, wherein the coding of the loop switch and the coding of the upper-level equipment connected with the loop switch have a mapping relation;

and coding the charging equipment according to the codes of the loop switches, wherein the codes of the charging equipment and the codes of the loop switches directly connected with the charging equipment have a mapping relation.

Further, the method further comprises:

acquiring the current value of a transformer, the current value of a loop switch and the current value of charging equipment connected with a phase line in the community power network topology in real time;

and determining to trigger charging regulation according to the current value of the transformer, the current value of the loop switch or the current value of the charging equipment.

Further, the determining to trigger the charging regulation according to the current value of the transformer, the current value of the loop switch, or the current value of the charging device includes:

calculating the change current value of the transformer according to the current value of the transformer, and triggering charging regulation and control if the change current value of the transformer is determined to be larger than a first set current value; or the like, or, alternatively,

calculating the change current value of the loop switch according to the current value of the loop switch, and triggering charging regulation and control if the change current value of the loop switch is determined to be larger than a second set current value; or the like, or, alternatively,

and calculating the change current value of the charging equipment according to the current value of the charging equipment, and triggering charging regulation and control if the change current value of the charging equipment is determined to be larger than a third set current value.

Further, the first set current value, the second set current value, and the third set current value are all equal.

Further, the determining a safe current value of the loop switch directly connected to a charging device according to the community power network topology, the first safe current value of the loop switch, and the safe current value of the transformer includes:

determining the upper-level equipment and the lower-level equipment of the loop switch according to the community power network topology;

determining a second safe current value of the circuit switch which is not directly connected with the charging equipment according to a first safe current value of the circuit switch which is not directly connected with the charging equipment, the sum of first safe currents of the next-stage equipment of the circuit switch which is not directly connected with the charging equipment and a quota current value determined by the previous-stage equipment of the circuit switch which is not directly connected with the charging equipment; and/or

And determining the safe current value of the circuit switch directly connected with the charging equipment according to the first safe current value of the circuit switch directly connected with the charging equipment and the quota current value determined by the upper-level equipment of the circuit switch directly connected with the charging equipment.

Further, the determining the safe current value of the loop switch directly connected with the charging device according to the first safe current value of the loop switch directly connected with the charging device and the quota current value determined by the previous device of the loop switch directly connected with the charging device includes:

and comparing the first safe current value of the loop switch directly connected with the charging equipment with the quota current value determined by the upper-level equipment of the loop switch directly connected with the charging equipment, and determining the smaller value of the first safe current value and the quota current value as the safe current value of the loop switch directly connected with the charging equipment.

Further, determining the second safe current value of the circuit switch indirectly connected with the charging device according to the first safe current value of the circuit switch indirectly connected with the charging device, the sum of the first safe currents of the devices at the next stage of the circuit switch indirectly connected with the charging device and the quota current value determined by the devices at the previous stage of the circuit switch indirectly connected with the charging device comprises:

and determining the sum of the first safety current of the next-stage device of the circuit switch which is not directly connected with the charging device, the first safety current value of the circuit switch which is not directly connected with the charging device and the minimum value of the quota current value determined by the previous-stage device of the circuit switch which is not directly connected with the charging device, and determining the minimum value of the sum, the first safety current value of the first safety current of the next-stage device of the circuit switch which is not directly connected with the charging device and the quota current value of the last-stage device of the circuit switch which is not directly connected with the charging device as the second safety current value of the circuit switch which is directly connected with the charging device.

Further, the determining the maximum acceptable current value of the charging device includes:

detecting the value of current input into the charging equipment when the charging pile outputs the current of a set value;

determining a value of the detected current as a maximum acceptable current value of the charging device.

Further, the determining the charging current of the charging device according to the safe current value of the loop switch directly connected to the charging device and the maximum acceptable current value of the charging device specifically includes:

establishing an objective function, the objective function including maximizing a sum of charging currents of charging devices;

establishing a constraint condition, wherein the constraint condition comprises that the charging current of the charging equipment is smaller than the maximum acceptable current value of the charging equipment, and the sum of the currents of the charging equipment connected with the loop switch directly connected with the charging equipment is smaller than the safety current of the loop switch directly connected with the charging equipment;

and calculating and obtaining the charging current of the charging equipment according to the constraint condition and the objective function.

establishing a constraint condition, wherein the constraint condition comprises that the charging current of charging equipment is smaller than the maximum acceptable current value of the charging equipment, the sum of proportional currents of the charging equipment connected with the loop switch directly connected with the charging equipment is smaller than the safety current of the loop switch directly connected with the charging equipment, the proportional current of the charging equipment is the product of the charging current of the charging equipment and a proportional coefficient corresponding to the charging equipment, and the proportional coefficient is determined according to the access time of the charging equipment;

Further, the determining of the proportionality coefficient according to the access time of the charging device specifically includes:

determining that the access time is less than a first time set value, and then the proportional coefficient is a first set value; or determining that the access time is greater than a first time set value and less than a second time set value, and then the proportionality coefficient is a second set value; or determining that the access time is greater than the second time set value, and the proportionality coefficient is a third set value, wherein the first set value is greater than the second set value, and the third set value is greater than the second set value.

In a second aspect, the present invention provides a charging regulation and control system, including:

a maximum acceptable current value determination unit for determining a maximum acceptable current value of the charging device;

the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a community power network topology, a first safe current value of a loop switch in the community power network topology and a safe current value of a transformer;

the safety current value determining unit is used for determining the safety current value of the loop switch directly connected with the charging equipment according to the community power network topology, the first safety current value of the loop switch and the safety current value of the transformer;

and the charging current calculation unit is used for determining the charging current of the charging equipment according to the safe current value of the loop switch directly connected with the charging equipment and the maximum acceptable current value of the charging equipment.

Further, the system further comprises:

the encoding unit is used for encoding the transformer, the loop switch and the charging equipment in the community power network topology to construct the community power network topology.

Further, the encoding unit is specifically configured to:

encoding the transformer;

Further, the system further comprises:

the regulation and control triggering unit is used for acquiring the current value of a transformer, the current value of a loop switch and the current value of charging equipment connected with a phase line in the community power network topology in real time; and determining to trigger charging regulation according to the current value of the transformer, the current value of the loop switch or the current value of the charging equipment.

Further, the regulation and control triggering unit is specifically configured to:

calculating the change current value of the transformer according to the current value of the transformer, and starting current regulation and control if the change current value of the transformer is determined to be larger than a first set current value; or the like, or, alternatively,

calculating the change current value of the loop switch according to the current value of the loop switch, and starting current regulation if the change current value of the loop switch is determined to be larger than a second set current value; or the like, or, alternatively,

and calculating the change current value of the charging equipment according to the current value of the charging equipment, and starting current regulation and control if the change current value of the charging equipment is determined to be larger than a third set current value.

Further, the first set current value, the second set current value and the third set current value are the same.

Further, the safe current value determination unit includes:

the upper and lower equipment determining unit is used for determining upper and lower equipment of the loop switch according to the community power network topology;

the first safety current value determining unit is used for determining a second safety current value of the circuit switch which is not directly connected with the charging equipment according to a first safety current value of the circuit switch which is not directly connected with the charging equipment, the sum of a first safety current of a next-stage device of the circuit switch which is not directly connected with the charging equipment and a quota current value determined by a previous-stage device of the circuit switch which is not directly connected with the charging equipment;

and the second safe current value determining unit is used for determining the safe current value of the circuit switch directly connected with the charging equipment according to the first safe current value of the circuit switch directly connected with the charging equipment and the quota current value determined by the previous-stage equipment of the circuit switch directly connected with the charging equipment.

Further, the second safe current value determining unit is specifically configured to:

Further, the first safe current value determining unit is specifically configured to:

and determining the minimum value of the sum of the safety current of the next-stage device of the circuit switch which is not directly connected with the charging device, the first safety current value of the circuit switch which is not directly connected with the charging device and the quota current value determined by the previous-stage device of the circuit switch which is not directly connected with the charging device, and determining the minimum value of the sum, the first safety current value and the quota current value as the second safety current value of the circuit switch which is not directly connected with the charging device.

Further, the maximum acceptable current value determining unit is specifically configured to:

Further, the charging current calculation unit is specifically configured to:

establishing an objective function, the objective function including maximizing a sum of charging currents of charging devices; establishing a constraint condition, wherein the constraint condition comprises that the charging current of the charging equipment is smaller than the maximum acceptable current value of the charging equipment, and the sum of the currents of all the charging equipment connected with the loop switch directly connected with the charging equipment is smaller than the safety current of the loop switch directly connected with the charging equipment;

Further, the charging current calculation unit is specifically configured to:

In a third aspect, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a computer device, performs the aforementioned method steps.

In a fourth aspect, the present invention also provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the computer program to make the computer device execute the steps of the aforementioned method.

The invention has the beneficial effects that: after the community network topology determines to trigger current regulation, determining the maximum acceptable current of the charging equipment and obtaining the safe current of the transformer and the first safe current of the loop switch, determining the safe current of the loop switch directly connected with the charging equipment according to the first safe current of the loop switch and the safe current of the transformer, and determining the charging current of the charging equipment according to the safe current of the loop switch directly connected with the charging equipment and the maximum acceptable current of the charging equipment. The charging regulation and control method can maximize the sum of the charging currents of the charging equipment and improve the utilization efficiency of energy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope of the present invention.

Fig. 1 is a schematic flow chart of a charging regulation method according to a first embodiment of the present invention;

fig. 2 is a schematic diagram of a power topology of a community network according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a charging regulation and control system according to a second embodiment of the present invention;

fig. 4 is a schematic structural diagram of a current determining unit according to a second embodiment of the present invention.

Detailed Description

Hereinafter, various embodiments of the present invention will be described more fully. The invention is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit various embodiments of the invention to the specific embodiments disclosed herein, but on the contrary, the intention is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of various embodiments of the invention.

Hereinafter, the terms "includes" or "may include" used in various embodiments of the present invention indicate the presence of disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, is not to be understood as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.

In various embodiments of the invention, the expression "a or/and B" includes any or all combinations of the words listed simultaneously, e.g., may include a, may include B, or may include both a and B.

Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.

It should be noted that: in the present invention, unless otherwise explicitly stated or defined, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; there may be communication between the interiors of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, it should be understood by those skilled in the art that the terms indicating an orientation or a positional relationship herein are based on the orientations and the positional relationships shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation and operate, and thus, should not be construed as limiting the present invention.

The terminology used in the various embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the present invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

An embodiment of the present invention provides a method for regulating charging, as shown in fig. 1, including the following steps:

s1, determining the maximum acceptable current value of the charging equipment, acquiring the community power network topology, the first safe current value of a loop switch and the safe current value of a transformer in the community power network topology, and determining the safe current value of the loop switch directly connected with the charging equipment according to the community power network topology, the first safe current value of the loop switch and the safe current value of the transformer.

Specifically, the charging pile outputs the maximum current, the acceptable current value of the charging equipment when the current reaches the stable state when the charging pile outputs the maximum current is detected, and the detected acceptable current value of the charging equipment is determined as the maximum acceptable current value of the charging equipment. For example, the maximum outputable current of the charging pile is 32A, the charging pile outputs the current of 32A, after the current of the charging equipment is stabilized, the acceptable current value 20A of the charging equipment is detected, and then the detected current value 20A is determined as the maximum acceptable current value of the charging equipment.

Specifically, a community power network topology is obtained, wherein the community power network topology comprises a transformer, a loop switch and a charging device, the transformer is connected with the loop switch, and the loop switch is directly or indirectly connected with the charging device. After the community network topology is obtained, encoding a transformer, a loop switch and charging equipment in the community network topology to construct the community network topology, and determining the connection relation of the transformer, the loop switch and the charging equipment according to the encoding.

As shown in fig. 2, the transformer code is 1, the next-stage switches of the transformer are respectively coded as a circuit switch 01, a circuit switch 02 and a circuit switch 03, and for the next-stage circuit switch of the circuit switch 01, the circuit switch 0101, the next-stage circuit switch of the circuit switch 0101 is coded as a circuit switch 010101, and the charging devices of the circuit switch 010101 are respectively coded as 01010101, 01010102 and 01010103.

Specifically, the upper-level equipment and the lower-level equipment of each loop switch are determined according to the community power network topology. And for the loop switch which is not directly connected with the charging equipment, determining a second safe current value according to the first safe current value of the loop switch which is not directly connected with the charging equipment, the sum of the first safe current of the next-stage equipment of the loop switch which is not directly connected with the charging equipment and the quota current value determined by the previous-stage equipment of the loop switch which is not directly connected with the charging equipment. Further, comparing the sum of the safety currents of the next-stage equipment of the loop switch which is not directly connected with the charging equipment with the first safety current value of the loop switch which is not directly connected with the charging equipment to obtain a first smaller value; and judging the first smaller value and the quota current value determined by the previous stage device of the loop switch which is not directly connected with the charging device, determining the smaller value of the first smaller value and the quota current value determined by the previous stage device of the loop switch which is not directly connected with the charging device as a second safe current value of the loop switch which is not directly connected with the charging device, and/or determining the safe current value of the loop switch which is directly connected with the charging device according to the first safe current value of the loop switch which is directly connected with the charging device and the quota current value determined by the previous stage device of the loop switch which is directly connected with the charging device for the loop switch which is directly connected with the charging device (namely, the loop switch and the charging device are not connected with other devices except a connecting wire). Further, the first safe current value of the loop switch directly connected with the charging equipment is compared with the quota current value determined by the upper-level equipment of the loop switch directly connected with the charging equipment, and the smaller value of the first safe current value and the quota current value is determined as the safe current value of the loop switch directly connected with the charging equipment.

For example, regarding the circuit switch 010101, it is assumed that the first safety current value of the circuit switch 010101 is a ampere, if the safety current limit value established by the previous-stage equipment circuit switch 0101 for the circuit switch 010101 after the current is limited by the previous-stage equipment circuit switch 0101 of the circuit switch 010101 is B ampere, the safety current value of the circuit switch 010101 is determined by comparing the magnitude values of a and B, if a is smaller than B, the safety current value of the circuit switch 010101 is determined to be a, and if a is larger than B, the safety current value of the circuit switch 010101 is determined to be B.

For example, for the loop switch 0201, if the first safety current value set by the loop switch 0201 is C amperes, after the previous-stage device loop switch 02 limits the current, the previous-stage device loop switch 02 establishes a safety current limit for the loop switch 0201, and if the safety current value of the limit is D amperes, the sum of the first safety currents of the next-stage device loop switch 020101 and the loop switch 020102 of the loop switch 0201 is E amperes, the magnitudes of C, D and E are compared, and the minimum value of the three is determined as the second safety current value of the loop switch 0201.

And S2, determining the charging current of the charging equipment according to the safe current value of the loop switch directly connected with the charging equipment and the maximum acceptable current value of the charging equipment.

Specifically, an objective function and a constraint condition are established, and the charging current of the charging equipment is obtained by solving according to the constraint condition and the objective function. In one embodiment, the objective function includes a maximum sum of charging currents of the charging devices, and the constraint condition includes: for each charging device, the charging current of the charging device is not larger than the maximum acceptable current value, and the sum of the charging currents of a plurality of charging devices directly connected with the same loop switch is smaller than the safe current value of the same loop switch.

As explained with reference to fig. 2, assuming that the charging current of charging device 01010101 is I1, the charging current of charging device 01010102 is I2, the charging current of charging device 01010103 is I3, the charging current of charging device 02010101 is I4, the charging current of charging device 5 is I5, the charging current of charging device 02010201 is I6, the charging current of charging device 0301 is I7, the charging current of charging device 0302 is I8, the maximum acceptable current of charging device 01001 is I '1, the maximum acceptable current of charging device 01010102 is I' 2, the maximum acceptable current of charging device 01010103 is I '3, the maximum acceptable current of charging device 02010101 is I' 4, the maximum acceptable current of charging device 02010102 is I '5, the maximum acceptable current of charging device 02010201 is I' 6, the maximum acceptable current of charging device is I '7, the maximum acceptable current of charging device is I' 8, when the safety current of the loop switch 010101 is I9, the safety current of the loop switch 020101 is I10, the safety current of the loop switch 020102 is I11, and the safety current of the loop switch 03 is I12, the objective function is: max (I1+ I2+ I3+ I4+ I5+ I6+ I7+ I8), with the following constraints: i1< I '1, I2< I' 2, I3< I '3, I4< I' 4, I5< I '5, I6< I' 6, I7< I '7, I8< I' 8, I1+ I2+ I3< I9, I4+ I5< I10, I6< I11, I7+ I8< I12. And calculating the charging current value of each charging device according to the objective function and the constraint condition. In the case where there are multiple solutions, the optimal solution is obtained on the principle of satisfying a smaller maximum acceptable current.

Specifically, an objective function and a constraint condition are established, and the charging current of the charging equipment is obtained by solving according to the constraint condition and the objective function. In another specific embodiment, the objective function includes that the sum of charging currents of charging devices is maximum, the constraint condition includes that the charging current of a charging device is smaller than the maximum acceptable current value of the charging device, the sum of proportional currents of the charging devices connected to the loop switch directly connected to the charging device is smaller than the safety current of the loop switch directly connected to the charging device, the proportional current of the charging device is the product of the charging current of the charging device and a proportional coefficient corresponding to the charging device, and the proportional coefficient is determined according to the time when the charging device is switched in;

more specifically, the access time of the charging device is obtained, if the access time is determined to be smaller than a first time set value, the scaling factor is a first set value, if the access time is determined to be larger than the first time set value and smaller than a second time set value, the scaling factor is a second set value, if the access time is determined to be larger than the second time set value, the scaling factor is a third set value, wherein the first set value is larger than the second set value, and the third set value is larger than the second set value.

As explained with reference to fig. 2, assuming that the charging current of charging device 01010101 is I1, the charging current of charging device 01010102 is I2, the charging current of charging device 01010103 is I3, the charging current of charging device 02010101 is I4, the charging current of charging device 5 is I5, the charging current of charging device 02010201 is I6, the charging current of charging device 0301 is I7, the charging current of charging device 0302 is I8, the maximum acceptable current of charging device 01001 is I '1, the maximum acceptable current of charging device 01010102 is I' 2, the maximum acceptable current of charging device 01010103 is I '3, the maximum acceptable current of charging device 02010101 is I' 4, the maximum acceptable current of charging device 02010102 is I '5, the maximum acceptable current of charging device 02010201 is I' 6, the maximum acceptable current of charging device is I '7, the maximum acceptable current of charging device is I' 8, the safety current of the loop switch 010101 is I9, the safety current of the loop switch 020101 is I10, the safety current of the loop switch 020102 is I11, the safety current of the loop switch 03 is I12, and the time for accessing the charging equipment 01010101 is t₁The time when the charging device 01010102 is connected is t₂The time when the charging device 01010103 is connected is t₃The time when the charging device 02010101 is connected is t₄The time when the charging device 02010102 is connected is t₅The time when the charging device 02010201 is connected is t₆The time of the 0301 access of the charging equipment is t₇The time of the 0302 access of the charging equipment is t₈The proportionality coefficient of the charging equipment 01010101 is m₁The proportionality coefficient of the charging device 01010102 is m₂The proportionality coefficient of the charging device 01010103 is m₃The proportionality coefficient of the charging device 02010101 is m₄Proportionality coefficient m of charging device 02010102₅The proportionality coefficient of the charging device 02010201 is m₆The proportionality coefficient of the charging equipment 0301 is m₇The proportionality coefficient of the charging equipment 0302 is m₈Then the objective function is: max (I1+ I2+ I3+ I4+ I5+ I6+ I7+ I8), with the following constraints: i1<I’1，I2<I’2，I3<I’3， I4<I’4，I5<I’5，I6<I’6，I7<I’7，I8<I’8，m₁I1+m₂I2+m₃I3<I9，m₄I4+m₅I5<I10， m₆I6<I11，m₇I7+m₈I8<I12，

Wherein i is an integer, i belongs to [1, 8 ]]A is a first set value, preferably a is 1, b is a second set value, preferably b e (0.5, 1), c is a third set value, preferably c e (1, 1.5), said first set value is greater than said second set value, said third set value is greater than said second set value, T1 is a first time set value, preferably T1 is 1, T2 is a second time set value, preferably T2 is 6, T2 is 6_iThe access time of the ith vehicle. And calculating the charging current value of each charging device according to the objective function and the constraint condition. In the case where there are multiple solutions, the optimal solution is obtained on the principle of satisfying a smaller maximum acceptable current. Determining the corresponding proportionality coefficient according to the access time of each charging device, since the battery is in the first stage t_i< T1 and a third stage T_iThe current required for > T2 is relatively small, while in the second phase T1 < T_iThe charging current required for < T2 is large, and by setting the second set value smaller than the first set value and the third set value, the current of the vehicle in the second stage can be made relatively large. The distribution of the current is combined with the state of charge of the vehicle, so that the distribution of the current is more accurate.

Before step S1, the method for regulating charging according to the embodiment of the present invention further includes obtaining a current value of a transformer, a current value of a loop switch, and a current value of each charging device connected to the phase line in the community power network topology in real time; and determining to trigger charging regulation according to the current value of the transformer, the current value of the loop switch or the current value of the charging equipment.

Specifically, the change current value of the transformer is calculated according to the current value of the transformer, and if the change current value of the transformer is obtained by subtracting the current value of the transformer at the last detection time, whether the change current value of the transformer is greater than a first set current value is judged, and if the change current value is greater than the first set current value, current regulation and control are triggered. The first set current value is 1A, namely when the current change value of the transformer is larger than 1A, current regulation is triggered.

Specifically, the change current value of the transformer is calculated according to the current value of the loop switch, and if the change current value of the loop switch is obtained by subtracting the current value of the last detection time of the loop switch from the current value of the loop switch, whether the change current value of the loop switch is larger than a second set current value is judged, and if yes, current regulation is triggered. And the second set current value is 1A, namely when the current change value of any loop switch is greater than 1A, current regulation is triggered.

Specifically, the change current value of the charging device is calculated according to the current value of the charging device, if the change current value of the charging device is obtained by subtracting the detection current value of the charging device at the last detection time from the current value of the charging device, whether the change current value of the charging device is larger than a third set current value or not is judged, and if yes, current regulation and control are triggered. And the third set current value is 1A, namely when the current change value of any charging equipment is greater than 1A, current regulation is triggered.

In a word, when the current change value of any one device in the community network topology is larger than the corresponding set current value, current regulation is triggered. The trigger current regulation caused by unstable current change is avoided by setting the current value.

According to the charging regulation and control method, after the community power network topology determines the trigger current regulation and control, the maximum acceptable current of the charging equipment is determined, the safety current of the transformer and the first safety current of the loop switch are obtained, the safety current of the loop switch directly connected with the charging equipment is determined according to the first safety current of the loop switch and the safety current of the transformer, and the charging current of the charging equipment is determined according to the safety current of the loop switch directly connected with the charging equipment and the maximum acceptable current of the charging equipment. The charging regulation and control method of the embodiment of the invention can maximize the sum of the charging currents of the charging equipment and improve the utilization efficiency of energy.

Based on the first embodiment of the present invention, the second embodiment of the present invention provides a charging regulation and control system, as shown in fig. 3, the charging regulation and control system 10 includes: a maximum acceptable current value determining unit 1 for determining a maximum acceptable current value of the charging device; the acquisition unit 2 is used for acquiring a community power network topology, a first safe current value of a loop switch in the community power network topology and a safe current value of a transformer; the safety current value determining unit 3 is used for determining the safety current value of the loop switch directly connected with the charging equipment according to the community power network topology, the first safety current value of the loop switch and the safety current value of the transformer; and the charging current calculating unit 4 is used for determining the charging current of the charging equipment according to the safe current value of the loop switch directly connected with the charging equipment and the maximum acceptable current value of the charging equipment.

Specifically, the maximum acceptable current value determining unit 1 is configured to detect a stable current value of the charging device when the charging pile outputs a current of a set value, determine whether the detected current value is less than or equal to the set value, and determine, if yes, the detected current value of the charging device as the maximum acceptable current value of the charging device.

Specifically, if the maximum outputtable current value of the charging pile is 32A, when the charging pile outputs the maximum current, the current of the charging device when the current is stable is detected, and if the detected current value is less than or equal to 32A, the maximum acceptable current value of the charging device is determined to be the detected current value of the charging device.

Specifically, the maximum acceptable current value unit 1 is configured to detect, when the charging pile outputs a set current value and the charging device reaches a current stability, a current acceptable to the charging device, and determine the detected current value acceptable to the charging device as the maximum acceptable current value of the charging device. For example, the charging pile outputs a current of 32A, detects the acceptable current value of the charging device as 20A after the current of the charging device is stabilized, and determines the detected current value 20A as the maximum acceptable current value of the charging device.

Specifically, the obtaining unit 2 is configured to obtain the topology of the community power network, where the community power network includes a transformer, a loop switch, and a charging device, the transformer is connected to the loop switch, and the loop switch is directly or indirectly connected to the charging device.

Specifically, the charging regulation and control system further comprises a coding unit, wherein the coding unit is used for coding the transformer unit, the loop switch and the charging equipment in the community power network topology, so that the power network topology of the community can be determined through the coding. As shown in fig. 2, the encoding unit encodes the transformer as 1, and encodes the next-stage switches of the transformer as the circuit switch 01, the circuit switch 02 and the circuit switch 03, respectively, and for the next-stage circuit switch of the circuit switch 01, encodes as the circuit switch 0101, and encodes as the next-stage circuit switch of the circuit switch 0101, 010101.

Specifically, as shown in fig. 4, the safety current value determining unit 3 includes an upper and lower device determining unit 31, a first safety current value determining unit 32, and a second safety current value determining unit 33, where the upper and lower device determining unit 31 is configured to determine an upper device and a lower device of each circuit switch according to the community power network topology; the first safe current value determining unit 32 is configured to determine a second safe current value of the loop switch that is not directly connected to the charging device according to a first safe current value of the loop switch that is not directly connected to the charging device, a sum of safe currents of devices next to the loop switch that is not directly connected to the charging device, and a quota current value determined by a device previous to the loop switch that is not directly connected to the charging device; the second safe current value determining unit 33 is configured to determine the safe current value of the circuit switch directly connected to the charging device according to the first safe current value of the circuit switch directly connected to the charging device and the quota current value determined by the previous device of the circuit switch directly connected to the charging device.

Specifically, the first safety current determining unit 32 is specifically configured to determine the second safety current value according to a first safety current value of the circuit switch that is not directly connected to the charging device, a sum of first safety currents of devices that are next to the circuit switch that is not directly connected to the charging device, and a quota current value determined by a device that is previous to the circuit switch that is not directly connected to the charging device.

Specifically, the first safe current value determining unit 32 compares the sum of the first safe currents of the devices at the next stage of the circuit switch that is not directly connected to the charging device with the first safe current value of the circuit switch that is not directly connected to the charging device, and obtains a first smaller value; and judging the first smaller value and the quota current value determined by the upper-level equipment of the loop switch which is not directly connected with the charging equipment, and determining the smaller value of the first smaller value and the quota current value as a second safe current value of the loop switch which is not directly connected with the charging equipment.

For example, for the loop switch 0201, if the first safety current value set by the loop switch 0201 is C amperes, after the previous-stage device loop switch 02 limits the current, the previous-stage device loop switch 02 establishes a safety current limit for the loop switch 0201, and if the safety current value of the limit is D amperes, the initial safety current sum of the next-stage device loop switch 020101 and the loop switch 020102 of the loop switch 0201 is E amperes, the magnitudes of C, D and E are compared, and the minimum value of the three is determined as the safety current value of the loop switch 0201.

Specifically, the second safe current value determining unit 33 is specifically configured to determine the safe current value of the circuit switch directly connected to the charging device according to the first safe current value of the circuit switch directly connected to the charging device and the quota current value determined by the previous device of the circuit switch directly connected to the charging device. Further, the second safe current value determining unit 33 compares the first safe current value of the circuit switch directly connected to the charging device with the quota current value determined by the previous device of the circuit switch directly connected to the charging device, and determines the smaller value of the first safe current value and the quota current value as the safe current value of the circuit switch directly connected to the charging device.

For example, regarding the circuit switch 010101, it is assumed that the first safety current value set by the circuit switch 010101 is a ampere, if the safety current limit value set by the previous-stage equipment circuit switch 0101 for the circuit switch 010101 after the current is limited by the previous-stage equipment circuit switch 0101 of the circuit switch 010101 is B ampere, the safety current value of the circuit switch 010101 is determined by comparing the magnitude values of a and B, if a is smaller than B, the safety current value of the circuit switch 010101 is determined as a, and if a is larger than B, the safety current value of the circuit switch 010101 is determined as B.

Specifically, the charging current calculation unit is specifically configured to construct an objective function and a constraint condition, and calculate and obtain the charging current of each charging device according to the constraint condition and the objective function. In a specific embodiment, the objective function includes a maximum sum of charging currents of the charging devices, the constraint condition includes that the charging current of the charging device is smaller than a maximum acceptable current value of the charging device, and a sum of currents of all the charging devices connected to the loop switch directly connected to the charging device is smaller than a safety current of the loop switch directly connected to the charging device.

As explained with reference to fig. 2, assuming that the charging current of charging device 01010101 is I1, the charging current of charging device 01010102 is I2, the charging current of charging device 01010103 is I3, the charging current of charging device 02010101 is I4, the charging current of charging device 5 is I5, the charging current of charging device 02010201 is I6, the charging current of charging device 0301 is I7, the charging current of charging device 0302 is I8, the maximum acceptable current of charging device 01001 is I '1, the maximum acceptable current of charging device 01010102 is I' 2, the maximum acceptable current of charging device 01010103 is I '3, the maximum acceptable current of charging device 02010101 is I' 4, the maximum acceptable current of charging device 02010102 is I '5, the maximum acceptable current of charging device 02010201 is I' 6, the maximum acceptable current of charging device is I '7, the maximum acceptable current of charging device is I' 8, when the safety current of the loop switch 010101 is I9, the safety current of the loop switch 020101 is I10, the safety current of the loop switch 020102 is I11, and the safety current of the loop switch 03 is I12, the objective function is:

max (I1+ I2+ I3+ I4+ I5+ I6+ I7+ I8), with the following constraints: i1< I '1, I2< I' 2, I3< I '3, I4< I' 4, I5< I '5, I6< I' 6, I7< I '7, I8< I' 8, I1+ I2+ I3< I9, I4+ I5< I10, I6< I11, I7+ I8< I12. And calculating the charging current value of each charging device according to the objective function and the constraint condition. In the case where there are multiple solutions, the optimal solution is obtained on the principle of satisfying a smaller maximum acceptable current.

Specifically, an objective function and a constraint condition are established, and the charging current of the charging equipment is obtained by solving according to the constraint condition and the objective function. In another specific embodiment, the constraint condition includes that a charging current of a charging device is less than a maximum acceptable current value of the charging device, a sum of proportional currents of the charging devices connected to the loop switch directly connected to the charging device is less than a safety current of the loop switch directly connected to the charging device, the proportional current of the charging device is a product of the charging current of the charging device and a proportional coefficient corresponding to the charging device, and the proportional coefficient is determined according to a time for which the charging device is switched in;

As explained with reference to fig. 2, assuming that the charging current of charging device 01010101 is I1, the charging current of charging device 01010102 is I2, the charging current of charging device 01010103 is I3, the charging current of charging device 02010101 is I4, the charging current of charging device 5 is I5, the charging current of charging device 02010201 is I6, the charging current of charging device 0301 is I7, the charging current of charging device 0302 is I8, the maximum acceptable current of charging device 01001 is I '1, the maximum acceptable current of charging device 01010102 is I' 2, the maximum acceptable current of charging device 01010103 is I '3, the maximum acceptable current of charging device 02010101 is I' 4, the maximum acceptable current of charging device 02010102 is I '5, the maximum acceptable current of charging device 02010201 is I' 6, the maximum acceptable current of charging device is I '7, the maximum acceptable current of charging device is I' 8, the safety current of the loop switch 010101 is I9, the safety current of the loop switch 020101 is I10, the safety current of the loop switch 020102 is I11, the safety current of the loop switch 03 is I12, and the time for accessing the charging equipment 01010101 is t₁The time when the charging device 01010102 is connected is t₂The time when the charging device 01010103 is connected is t₃The time when the charging device 02010101 is connected is t₄The time when the charging device 02010102 is connected is t₅The time when the charging device 02010201 is connected is t₆The time of the 0301 access of the charging equipment is t₇The time of the 0302 access of the charging equipment is t₈The proportionality coefficient of the charging equipment 01010101 is m₁The proportionality coefficient of the charging device 01010102 is m₂The proportionality coefficient of the charging device 01010103 is m₃The proportionality coefficient of the charging device 02010101 is m₄Proportionality coefficient m of charging device 02010102₅Ratio of charging device 02010201Example coefficient of m₆The proportionality coefficient of the charging equipment 0301 is m₇The proportionality coefficient of the charging equipment 0302 is m₈Then the objective function is:

max (I1+ I2+ I3+ I4+ I5+ I6+ I7+ I8), with the following constraints: i1<I’1，I2<I’2，I3<I’3， I4<I’4，I5<I’5，I6<I’6，I7<I’7，I8<I’8，m₁I1+m₂I2+m₃I3<I9，m₄I4+m₅I5<I10， m₆I6<I11，m₇I7+m₈I8<I12，

Wherein i is an integer, i belongs to [1, 8 ]]A is a first set value, preferably a ═ 1, b is a second set value, preferably b ∈ (0.5, 1), c is a third set value, preferably c ∈ (1, 1.5), said first set value is greater than said second set value, said third set value is greater than said second set value, T1 is a first time set value, preferably T1 is 1, T2 is a second time set value, preferably T2 is 6, T is a third set value, c is a fourth set_iThe access time of the ith vehicle. And calculating the charging current value of each charging device according to the objective function and the constraint condition. In the case where there are multiple solutions, the optimal solution is obtained on the principle of satisfying a smaller maximum acceptable current. Determining the corresponding proportionality coefficient according to the access time of each charging device, since the battery is in the first stage t_i< T1 and a third stage T_iThe current required for > T2 is relatively small, while in the second phase T1 < T_iThe charging current required for < T2 is large, and by setting the second set value smaller than the first set value and the third set value, the current of the vehicle in the second stage can be made relatively large, and the distribution of the current is combined with the state of charge of the vehicle, thereby making the distribution of the current more accurate.

Specifically, the charging regulation and control system further comprises a regulation and control triggering unit, wherein the regulation and control triggering unit is used for acquiring the current value of a transformer, the current value of a loop switch and the current value of each charging device connected to a phase line in the community power network topology in real time; and determining to trigger charging regulation according to the current value of the transformer, the current value of the loop switch or the current value of the charging equipment.

Specifically, the regulation trigger unit is specifically configured to: calculating the change current value of the transformer according to the current value of the transformer, and starting current regulation and control if the change current value of the transformer is determined to be larger than a first set current value; or calculating the change current value of the loop switch according to the current value of the loop switch, and starting current regulation if the change current value of the loop switch is determined to be larger than a second set current value; or calculating the change current value of the charging equipment according to the current value of the charging equipment, and starting current regulation if the change current value of the charging equipment is determined to be larger than a third set current value.

Specifically, the first set current value, the second set current value, and the third set current value are the same.

Based on the first embodiment of the present invention, a third embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a computer device, implements the foregoing method steps.

Based on the first embodiment of the present invention, a computer device is provided in the fourth embodiment of the present invention, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to make the computer device execute the steps according to the foregoing method.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and bus dynamic RAM (RDRAM).

The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, other various changes and modifications can be made according to the above-described technical solutions and concepts, and all such changes and modifications should fall within the protection scope of the present invention.

Claims

1. A charging regulation method is characterized by comprising the following steps:

determining the maximum acceptable current value of charging equipment and acquiring a community power network topology, a first safe current value of a loop switch in the community power network topology and a safe current value of a transformer;

determining a safe current value of the loop switch directly connected with charging equipment according to the community power network topology, the first safe current value of the loop switch and the safe current value of the transformer;

determining the charging current of the charging equipment according to the safe current value of the loop switch directly connected with the charging equipment and the maximum acceptable current value of the charging equipment;

wherein the determining the safe current value of the loop switch directly connected to the charging device according to the community power network topology, the first safe current value of the loop switch, and the safe current value of the transformer comprises:

2. The method of claim 1, further comprising:

3. The method of claim 2, wherein the encoding the transformer, the loop switch, and the charging device in the community power network topology to construct the community power network topology comprises:

encoding the transformer;

4. The method of claim 1, further comprising:

5. The method of claim 4, wherein the determining to trigger charging regulation based on the current value of the transformer, the current value of the loop switch, or the current value of the charging device comprises:

6. The method of claim 5, wherein:

the first set current value, the second set current value and the third set current value are all equal.

7. The method of claim 1, wherein determining the safe current value of the circuit switch directly connected to the charging device according to the first safe current value of the circuit switch directly connected to the charging device and the quota current value determined by the previous device of the circuit switch directly connected to the charging device comprises:

8. The method of claim 1, wherein determining the second safe current value of the loop switch indirectly connected to the charging device according to a first safe current value of the loop switch indirectly connected to the charging device, a sum of first safe currents of devices next to the loop switch indirectly connected to the charging device, and a quota current value determined by a device previous to the loop switch indirectly connected to the charging device comprises:

and determining the sum of the first safety current of the next-stage device of the circuit switch which is not directly connected with the charging device, the first safety current value of the circuit switch which is not directly connected with the charging device and the minimum value of the quota current value determined by the previous-stage device of the circuit switch which is not directly connected with the charging device, and determining the minimum value of the sum, the first safety current value of the first safety current of the next-stage device of the circuit switch which is not directly connected with the charging device and the quota current value of the last-stage device of the circuit switch which is not directly.

9. The method of claim 1, wherein determining the maximum acceptable current value for the charging device comprises:

detecting the value of current acceptable by the charging equipment when the charging pile outputs the current of a set value;

10. The method of claim 1, wherein the determining the charging current of the charging device according to the safe current value of the circuit switch directly connected to the charging device and the maximum acceptable current value of the charging device specifically comprises:

11. The method of claim 1, wherein the determining the charging current of the charging device according to the safe current value of the circuit switch directly connected to the charging device and the maximum acceptable current value of the charging device specifically comprises:

establishing a constraint condition, wherein the constraint condition comprises that the charging current of charging equipment is smaller than the maximum acceptable current value of the charging equipment, and the sum of proportional currents of the charging equipment connected with the loop switch directly connected with the charging equipment is smaller than the safety current of the loop switch directly connected with the charging equipment, wherein the proportional current of the charging equipment is the product of the charging current of the charging equipment and a proportional coefficient corresponding to the charging equipment, and the proportional coefficient is determined according to the access time of the charging equipment;

12. The method according to claim 11, wherein the determining of the scaling factor according to the time of the charging device accessing specifically includes:

determining that the access time is less than a first time set value, and then the proportionality coefficient is a first set value; or

Determining that the access time is greater than a first time set value and less than a second time set value, and then the proportional coefficient is a second set value; or

And if the access time is determined to be greater than the second time set value, the proportionality coefficient is a third set value, wherein the first set value is greater than the second set value, and the third set value is greater than the second set value.

13. A charging regulation system, comprising:

the charging current calculation unit is used for determining the charging current of the charging equipment according to the safe current value of the loop switch directly connected with the charging equipment and the maximum acceptable current value of the charging equipment;

the safety current value determination unit includes: the upper and lower equipment determining unit is used for determining upper and lower equipment of the loop switch according to the community power network topology; the first safety current value determining unit is used for determining a second safety current value of the circuit switch which is not directly connected with the charging equipment according to a first safety current value of the circuit switch which is not directly connected with the charging equipment, the sum of a first safety current of a next-stage device of the circuit switch which is not directly connected with the charging equipment and a quota current value determined by a previous-stage device of the circuit switch which is not directly connected with the charging equipment; and the second safe current value determining unit is used for determining the safe current value of the circuit switch directly connected with the charging equipment according to the first safe current value of the circuit switch directly connected with the charging equipment and the quota current value determined by the previous-stage equipment of the circuit switch directly connected with the charging equipment.

14. The system of claim 13, further comprising:

15. The system according to claim 14, wherein the encoding unit is specifically configured to:

encoding the transformer;

16. The system of claim 13, further comprising:

17. The charging regulation and control system of claim 16, wherein the regulation and control trigger unit is specifically configured to:

18. The system of claim 17, wherein:

the first set current value, the second set current value and the third set current value are the same.

19. The system according to claim 13, characterized in that the second safety current value determination unit is specifically configured to:

20. The system according to claim 13, characterized in that the first safety current value determination unit is specifically configured to:

21. The system according to claim 13, wherein the maximum acceptable current value determining unit is specifically configured to:

22. The system of claim 13, wherein the charging current calculation unit is specifically configured to:

establishing an objective function, the objective function including maximizing a sum of charging currents of charging devices; establishing a constraint condition, wherein the constraint condition comprises that the charging current of the charging equipment is smaller than the maximum acceptable current value of the charging equipment, and the sum of the currents of all the charging equipment connected with the loop switch directly connected with the charging equipment is smaller than the safety current of the loop switch directly connected with the charging equipment; and calculating and obtaining the charging current of the charging equipment according to the constraint condition and the objective function.

23. The system of claim 13, wherein the charging current calculation unit is specifically configured to:

24. The system of claim 23, wherein the charging current calculation unit is specifically configured to:

and if the access time is determined to be smaller than a first time set value, the proportionality coefficient is a first set value, if the access time is determined to be larger than the first time set value and smaller than a second time set value, the proportionality coefficient is a second set value, if the access time is determined to be larger than the second time set value, the proportionality coefficient is a third set value, wherein the first set value is larger than the second set value, and the third set value is larger than the second set value.

25. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a computer device, carries out the method steps of any of the preceding claims 1 to 12.

26. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor executes the computer program to cause the computer device to perform the steps of the method according to any of claims 1 to 12.