CN115549132A

CN115549132A - Current adjusting method and device and electronic equipment

Info

Publication number: CN115549132A
Application number: CN202211332703.5A
Authority: CN
Inventors: 秦斐
Original assignee: Xi'an Telingchong New Energy Technology Co ltd
Current assignee: Xi'an Telingchong New Energy Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2022-12-30

Abstract

The application provides a current regulation method, a current regulation device and electronic equipment, and relates to the technical field of power control, wherein the method comprises the following steps: determining the upper limit of the load current of each phase according to the load current of each phase in the three-phase branch circuit, the load current capable of being adjusted upwards and the current capable of being adjusted upwards of each charging pile connected with the three-phase branch circuit; determining the degree of unbalance of three phases according to the upper limit of the load current of each phase; under the condition that the three-phase unbalance is larger than the unbalance threshold, determining a load current balance interval corresponding to the three-phase balance according to the load current upper limit of each phase; determining the expected load current of each phase according to the upper limit of the load current, the lower limit of the load current and the load current balance interval of each phase; and adjusting the working current of the charging pile connected with each phase according to the expected load current of each phase, wherein the lower limit of the load current of each phase is determined according to the load current of the phase and the adjustable current of each connected charging pile. The application provides a technical scheme can reduce the three-phase unbalance degree, improves power supply efficiency.

Description

Current regulation method and device and electronic equipment

Technical Field

The present disclosure relates to the field of power control technologies, and in particular, to a current adjusting method and apparatus, and an electronic device.

Background

With the continuous development of new energy technology, the electric automobile technology is also developing at a high speed, and the charging pile is used as a charging facility of the electric automobile, and the scale of the charging pile is also getting larger and larger.

Fill electric pile and have single-phase charging pile and three-phase charging pile's branch, single-phase charging pile can face the unbalanced problem of three-phase when charging for electric automobile.

When three phases are unbalanced, the power supply efficiency of a line and a distribution transformer is reduced slightly, a certain phase conductor is burnt out, a switch is burnt out, even a distribution transformer is burnt out in a single phase, and other serious consequences are caused, when three-phase loads are unbalanced seriously, the neutral point potential can be deviated, and the line voltage drop and the power consumption can be increased greatly. Therefore, three-phase imbalance becomes a problem to be solved urgently.

Disclosure of Invention

In view of the above, the present application provides a current regulation method, a current regulation apparatus and an electronic device, which are used for reducing three-phase imbalance.

In order to achieve the above object, in a first aspect, an embodiment of the present application provides a current regulation method, including:

determining the upper limit of the load current of each phase according to the load current of each phase in the three-phase branch circuit, the load current capable of being adjusted upwards and the current capable of being adjusted upwards of each charging pile connected with the three-phase branch circuit;

determining the degree of unbalance of three phases according to the upper limit of the load current of each phase;

under the condition that the three-phase unbalance is larger than the unbalance threshold, determining a load current balance interval corresponding to three-phase balance according to the load current upper limit of each phase;

determining the expected load current of each phase according to the upper load current limit, the lower load current limit and the load current balance interval of each phase, wherein the lower load current limit of each phase is determined according to the load current of the phase and the down-adjustable current of each connected charging pile;

and adjusting the working current of the charging pile connected with each phase according to the expected load current of each phase.

As an optional implementation manner of this embodiment of the application, after determining the three-phase imbalance degree according to the upper limit of the load current of each phase, before adjusting the operating current of each charging pile connected to each phase according to the expected load current of each phase, the method further includes:

and determining the upper limit of the load current of each phase as the expected load current of the phase when the three-phase unbalance degree is less than or equal to the unbalance degree threshold value.

As an optional implementation manner of this embodiment of the present application, determining the upper limit of the load current of each phase according to the sum of the load current of each phase in the three-phase branch, the adjustable load current, and the adjustable current of each connected charging pile includes:

determining the actual adjustable current of each phase according to the sum of the adjustable load current of each phase in the three-phase branch and the adjustable current of each charging pile connected with the load current;

the upper load current limit for each phase is determined based on the actual adjustable up current and the load current for each phase.

As an alternative implementation of the embodiment of the present application, the actual adjustable current of each phase is the smaller value of the sum of the adjustable load current of the phase and the adjustable current of the connected charging pile.

As an optional implementation manner of this embodiment, the load current balance interval is [ Iavg (1-Th) ] _R )，Iavg*(1+Th _R )]Where Iavg represents the average value of the upper limit of the load current of each phase, th _R Representing the unbalancing degree threshold.

As an optional implementation manner of the embodiment of the present application, for each phase, when the lower load current limit of the phase is greater than the upper limit current of the load current balance interval, the desired load current of the phase is equal to the lower load current limit of the phase;

when the lower limit of the load current of the phase is less than or equal to the upper limit current of the load current balance interval and the upper limit of the load current of the phase is greater than or equal to the upper limit current of the load current balance interval, the expected load current of the phase is equal to the upper limit current of the load current balance interval;

when the upper limit of the load current of the phase is smaller than the upper limit current of the load current balance interval, the expected load current of the phase is equal to the upper limit of the load current of the phase.

As an optional implementation manner of the embodiment of the present application, the lower limit of the load current of each phase is a value obtained by subtracting the sum of the down-adjustable currents of the connected charging piles from the load current of the phase.

As an optional implementation manner of the embodiment of the present application, the adjusting the operating current of the charging pile connected to each phase according to the expected load current of each phase includes:

for each phase, when the expected load current of the phase is greater than the load current of the phase, the working current of a charging pile connected with the phase is adjusted up according to the difference between the expected load current of the phase and the load current;

and when the expected load current of the phase is smaller than the load current of the phase, the working current of the charging pile connected with the phase is adjusted downwards according to the difference between the load current of the phase and the expected load current.

In a second aspect, an embodiment of the present application provides a current regulation apparatus, including: a determination module and an adjustment module, wherein:

the determination module is to: determining the upper limit of the load current of each phase according to the load current of each phase in the three-phase branch circuit, the load current capable of being adjusted upwards and the load current capable of being adjusted upwards of each charging pile connected with the three-phase branch circuit;

under the condition that the three-phase unbalance degree is larger than the unbalance degree threshold value, determining a load current balance interval corresponding to three-phase balance according to the load current upper limit of each phase;

determining the expected load current of each phase according to the upper load current limit and the lower load current limit of each phase and the load current balance interval, wherein the lower load current limit of each phase is determined according to the load current of the phase and the down-adjustable current of each connected charging pile;

the adjustment module is used for: and adjusting the working current of the charging pile connected with each phase according to the expected load current of each phase.

As an optional implementation manner of the embodiment of the present application, the determining module is further configured to:

after the three-phase unbalance degree is determined according to the upper load current limit of each phase, before the adjusting module adjusts the working current of each charging pile connected with each phase according to the expected load current of each phase, and under the condition that the three-phase unbalance degree is smaller than or equal to the unbalance degree threshold value, the upper load current limit of each phase is determined as the expected load current of the phase.

As an optional implementation manner of the embodiment of the present application, the determining module is specifically configured to:

the upper load current limit for each phase is determined based on the actual adjustable current and the load current for each phase.

As an alternative implementation of the embodiment of the present application, the actual adjustable current of each phase is the smaller value of the sum of the maximum adjustable load current of the phase and the adjustable current of the connected charging pile.

As an optional implementation manner of this embodiment, the lower limit of the load current of each phase is a value obtained by subtracting the sum of the down-adjustable currents of the connected charging piles from the load current of the phase.

In a third aspect, an embodiment of the present application provides an electronic device, including: a memory for storing a computer program and a processor; the processor is configured to perform the method of the first aspect or any of the embodiments of the first aspect when the computer program is invoked.

In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method according to the first aspect or any embodiment of the first aspect.

In a fifth aspect, embodiments of the present application provide a computer program product, which, when run on an adjustable charging pile apparatus, causes the adjustable charging pile apparatus to perform the current adjusting method according to any one of the first aspect.

According to the technical scheme provided by the embodiment of the application, the upper limit of the load current of each phase is determined according to the load current of each phase in a three-phase branch circuit, the load current capable of being adjusted upwards and the current capable of being adjusted upwards of each charging pile connected with the three-phase branch circuit; then determining the degree of unbalance of three phases according to the upper limit of the load current of each phase; under the condition that the three-phase unbalance is larger than the unbalance threshold, determining a load current balance interval corresponding to the three-phase balance according to the load current upper limit of each phase; then, according to the upper limit of the load current of each phase, the lower limit of the load current and the load current balance interval, determining the expected load current of each phase; and finally, adjusting the working current of the charging pile connected with each phase according to the expected load current of each phase. Can reduce the unbalanced degree of three-phase when improving the charging pile speed of charging like this to can reduce because the unbalanced three-phase causes certain looks wire to burn out when causing, the switch burns out, and the emergence of phenomenon such as distribution transformer single-phase burns out even, and improve distribution transformer's power supply efficiency, reduce line voltage drop and consumption.

Drawings

Fig. 1 is a schematic structural diagram of an electric system provided in an embodiment of the present application;

fig. 2 is a schematic flowchart of a current regulation method according to an embodiment of the present disclosure;

fig. 3 is a relationship diagram of a load current interval and a load current balance interval provided in the embodiment of the present application;

fig. 4 is a schematic structural diagram of a current regulator according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings. The terminology used in the description of the embodiments of the examples herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

First, a system architecture related to an embodiment of the present application is introduced, please refer to fig. 1, where fig. 1 is a schematic diagram of an electrical system architecture provided in an embodiment of the present application.

As shown in fig. 1, the power consumption system includes a power grid 10, a power grid-side metering device 20, a distribution box 30, a router 40, and a charging pile 50.

It is to be understood that the illustrated structure of the embodiments of the present application does not constitute a specific limitation to the electric system. In other embodiments of the present application, the powered system may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Specifically, the power grid 10 is used to provide electrical energy to the entire power consumption system; the power grid side metering device 20 is connected with a power grid 10, a junction box 30 and each charging pile 50, and the power grid side metering device 20 is mainly used for measuring and recording power generation amount; the junction box 30 is connected with each charging pile 50 and is mainly used for providing required current for each charging pile, and each phase circuit divided by the junction box 30 can be connected with one or more charging piles 50 in parallel.

The router 40 is connected to each charging pile 50, and can establish connection with a monitoring operation center of a charging operation enterprise, thereby realizing bidirectional data transmission between the charging facility and the monitoring operation center. The monitoring operation center can monitor the operation parameters such as voltage, current, electric quantity, power of on-site charging pile in real time on the one hand, and on the other hand can monitor the state of charging pile, if there is an alarm or a fault, it can be maintained in time.

Each charging pile 50 can communicate with other charging piles 50 through the router 40 to obtain the operating parameters of other charging piles 50, such as working current and the like; the charging pile 50 may also communicate with other devices (e.g., a monitoring operation center) to obtain line parameters, such as load current of each phase, maximum allowable current of the power grid, and the like.

The power utilization system provided by the embodiment of the application can adjust the current of the charging piles 50 on each phase line according to the running state of each line in the system, so as to reduce the unbalanced degree of the three phases, wherein the electronic device for determining the current adjustment scheme can be the charging pile 50, or other electronic devices in the system, for example, after the electronic device is determined by the power grid side metering device 20, the current adjustment scheme corresponding to each charging pile 50 is distributed to each charging pile 50, so as to adjust the current; or, new electronic equipment may be added to the power utilization system, and the electronic equipment determines the current regulation scheme and distributes the current regulation scheme to each charging pile 50. In the specific implementation, the selection may be performed according to needs, and this is not particularly limited in the embodiments of the present application.

The above current regulation process is explained below.

Fig. 2 is a schematic flow chart of a current adjustment method provided in an embodiment of the present application, and as shown in fig. 2, the current adjustment method provided in the embodiment of the present application may include the following steps:

and S10, determining the upper limit of the load current of each phase according to the load current of each phase in the three-phase branch circuit, the load current capable of being adjusted upwards and the current capable of being adjusted upwards of each charging pile connected with the load current capable of being adjusted upwards.

In this embodiment, when adjusting the operating current of each charging pile, in order to improve the charging speed, the adjusting current of each charging pile can be determined according to the upper limit of the load current of each phase, so that the charging pile charges according to the maximum charging power

The adjustable load current per phase can be determined by the following equation (1):

I _ada ＝I _s -I _a ，I _adb ＝I _s -I _b ，I _adc ＝I _s -I _c (1)

wherein, I _ada Representing the adjustable load current of phase A, I _adb Representing the adjustable load current of phase B, I _adc Represents the adjustable load current of the C phase; i is _a Represents the load current of phase A, I _b Represents the load current of the B phase, I _c Represents the load current of the C phase; I.C. A _s Represents the maximum allowed current of the current grid,

alternatively, the maximum allowable current of the current power grid may be set as the rated current of the fuse, which may be fixed or may be set by the user.

The adjustable current of each charging pile can be determined according to the working current and the rated current of the charging pile, and specifically can be the absolute value of the difference between the working current and the rated current.

The upper limit of the load current of each phase may be specifically determined according to the following steps:

firstly, determining the sum I of the current which can be adjusted up and of the charging piles connected with the phase A _upa B phase of the charging piles are connected with the charging pile, the sum of the current which can be adjusted up is I _upb The sum of the current of charging piles connected with the C phase which can be adjusted up _upc 。

Second, the actual up-regulated current for each phase is calculated separately, wherein:

practically adjustable current Δ I of phase a _a ＝min(I _ada ，I _upa )；

Practical up-regulated current Δ I of phase B _b ＝min(I _adb ，I _upb )；

Practically adjustable current Δ I of phase C _c ＝min(I _adc ，I _upc )。

And thirdly, determining the upper limit of the load current of each phase, wherein:

upper limit of load current of A phase I _maxa ＝I _a +ΔI _a ；

Upper limit of load current I of phase B _maxb ＝I _b +ΔI _b ；

Upper limit of load current I of C phase _maxc ＝I _c +ΔI _c 。

And S20, determining the three-phase unbalance degree according to the upper limit of the load current of each phase.

After the upper limit of the load current of each phase is determined, the working current of each charging pile is directly adjusted according to the upper limit of the load current of each phase, and the condition that the three-phase balance requirement is not met may occur. Therefore, in order to reduce the degree of three-phase imbalance, in this embodiment, after determining the upper limit of the load current of each phase, it may be determined whether the current adjustment based on the upper limit of the load current of each phase meets the three-phase balancing requirement, and if the three-phase balancing requirement is met, the current adjustment may be performed by using the upper limit of the load current of each phase as the expected load current; if the three-phase balance requirement is not met, the expected load current meeting the three-phase balance requirement can be determined according to the upper limit of the load current of each phase, and then current regulation is carried out.

When judging whether the three-phase balance requirement is met, the three-phase unbalance degree can be determined according to the upper limit of the load current of each phase, and then whether the three-phase balance requirement is met is judged based on the determined three-phase unbalance degree.

In particular, the three-phase unbalance R _exp Can be determined by the following formula (2) and formula (3):

it should be noted that the algorithm for determining the three-phase imbalance degree includes, but is not limited to, the above calculation method, and other calculation methods may also be used, which is not particularly limited in this embodiment.

S30, judging whether the three-phase unbalance is smaller than or equal to the unbalance threshold, and if so, executing a step S40; otherwise, step S50 is performed.

Wherein the threshold value Th of the degree of unbalance _R For measuring whether the three-phase unbalance degree meets the three-phase balance requirement, it can be determined according to the relevant standard, taking the standard 15% commonly adopted in the power industry as an example, if R _exp And less than or equal to 15 percent, which means that the three-phase unbalance degree meets the three-phase balance requirement, step S40 can be executed to determine the upper limit of the load current of each phase as the expected load current of the phase. If R is _exp If > 15%, it means that the three-phase unbalance degree does not satisfy the three-phase balance requirement, step S50 and step S60 may be executed to determine the expected load current satisfying the three-phase balance requirement.

And S40, determining the upper limit of the load current of each phase as the expected load current of the phase.

Specifically, the desired load current I of the A phase _expa ＝I _maxa Desired load current I of phase B _expb ＝I _maxb Desired load current I of C phase _expc ＝I _maxc 。

And S50, determining a load current balance section corresponding to three-phase balance according to the upper limit of the load current of each phase.

Specifically, when determining the desired load current satisfying the three-phase balance requirement, a load current balance interval satisfying the three-phase balance requirement may be determined, and then the desired load current of each phase may be determined according to the load current balance interval.

Wherein the load current balance intervalThe determination may be performed according to the upper limit of the load current of each phase and the imbalance threshold, and specifically may be: [ I ] of _avg ×(1－Th _R )，I _avg ×(1+Th _R )]. Continuing to take the example of the unbalance threshold value being 15%, the corresponding three-phase balance interval is [ I% _avg ×(1－15％)，I _avg ×(1+15％)]。

And S60, determining the expected load current of each phase according to the upper limit of the load current, the lower limit of the load current and the load current balance interval of each phase.

In the specific determination of the desired load current for each phase, the determination may be made based on the relationship between the load current interval (i.e., [ lower load current limit, upper load current limit ]) and the load current balance interval for the phase.

Wherein, the load current lower limit of every looks can be based on the load current of this looks and the electric current of can adjusting down of each electric pile of charging of connection and confirm, wherein:

lower limit of load current I of A phase _mina ＝I _a －I _downa ，I _downa The sum of the current which can be adjusted down and is connected with each charging pile of the phase A;

lower limit of load current I of phase B _minb ＝I _b －I _downb ，I _downb The sum of the current which can be adjusted down and is connected with each charging pile of the phase B;

lower limit of load current I of C phase _minc ＝I _c －I _downc ，I _downc The sum of the current of each charging pile connected with the phase C can be adjusted.

The down-adjustable current of each charging pile can be determined according to the working current and the minimum charging current of the charging pile, and specifically can be the absolute value of the difference between the working current and the minimum charging current.

FIG. 3 is a graph showing a relationship between a load current section and a load current balance section, and the load current section [ I ] of any phase is shown in FIG. 3 _min ，I _max ]And load current balance interval [ I ] _avg ×(1－15％)，I _avg ×(1+15％)]There may be 6 cases as follows:

case 1,I _max ＜I _avg ×(1－15％)，I _min ＜I _avg ×(1－15％)；

Case 2,I _avg ×(1－15％)<I _max ＜I _avg ×(1+15％)，I _min ＜I _avg ×(1－15％)；

Case 3,I _avg ×(1－15％)<I _max ＜I _avg ×(1+15％)，I _avg ×(1－15％)<I _min ＜I _avg ×(1+15％)；

Case 4,I _max ＞I _avg ×(1+15％)，I _avg ×(1－15％)<I _min ＜I _avg ×(1+15％)；

Case 5,I _max ＞I _avg ×(1+15％)，I _min ＞I _avg ×(1+15％)；

Case 6,I _max ＞I _avg ×(1+15％)，I _min ＜I _avg ×(1－15％)。

In which, cases 1 to 3 may be combined, and case 4 and case 6 may be combined, and then they may be combined into the following three cases:

situation one, I _max ＜I _avg X (1 + 15%); case two, I _max ≥I _avg X (1 + 15%) and I _min ≤I _avg X (1 + 15%); case three, I _min ＞I _avg ×(1+15％)。

The desired load current determination method corresponding to the above three cases will be described below by taking phase a as an example.

The first condition is as follows: when the upper limit of the load current of the A phase is smaller than the upper limit of the load current balance interval, i.e. I _maxa ＜I _avg Desired load current I for phase A (1 +15%) _expa ＝I _max ；

In the second case, when the upper limit of the load current of the a-phase is greater than or equal to the upper limit of the load current balance section and the lower limit of the load current of the a-phase is less than or equal to the upper limit of the load current balance section, i.e., I _maxa ≥I _avg X (1 + 15%) and I _mina ≤I _avg Desired load current I for phase A (1 +15%) _expa ＝I _avg ×(1+15％)；

In case three, when the lower load current limit of the a phase is larger than the upper load current balance interval limit, i.e. I _mina ＞I _avg Desired load current I for phase A (1 +15%) _expa ＝I _min ；

The process of determining the desired load currents for phases B and C is similar to the process of determining the desired load current for phase a and is not described in detail herein.

And S70, adjusting the working current of the charging pile connected with each phase according to the expected load current of each phase.

Specifically, for each phase, the operating current of the charging post to which the phase is connected may be adjusted according to the difference between the desired load current and the load current of the phase.

When the expected load current of the phase is greater than the load current of the phase, the working current of the charging pile connected with the phase can be adjusted upwards according to the difference between the expected load current of the phase and the load current; and when the expected load current of the phase is smaller than the load current of the phase, the working current of the charging pile connected with the phase is adjusted downwards according to the difference between the load current of the phase and the expected load current.

Taking phase A as an example, the desired load current I of phase A can be determined _expa Load current I minus A phase _a Has a difference of Δ I _a . When Δ I _a When the load current value of the current A phase does not reach the expected load current value, the load current value can be determined according to the delta I _a The working current of the charging pile connected with the phase A is adjusted up; delta I _a When the value of (a) is less than 0, it means that the load current value of the current phase a exceeds the desired load current value, and the current of the phase a needs to be adjusted downward.

Wherein, in accordance with Δ I _a When the working current of the charging piles connected with the A phase is adjusted up, the delta I can be adjusted according to the ratio relation between the current of each charging pile connected with the A phase and the current of each charging pile connected with the A phase _a Proportionally distributing the electric energy to each charging pile; also can be expressed by _a Distributing the electric energy to a plurality of charging piles selected at will; the adjustment current of each charging pile may also be determined in other distribution manners, which is not particularly limited in this embodiment.

It will be appreciated by those skilled in the art that the above embodiments are exemplary and not intended to limit the present application. Where possible, the order of execution of one or more of the above steps may be adjusted, or selectively combined, to arrive at one or more other embodiments. The skilled person can select any combination of the above steps according to the needs, and all that does not depart from the essence of the scheme of the present application falls into the protection scope of the present application.

The current adjusting method provided by the embodiment of the application can reduce the degree of three-phase unbalance, thereby reducing the phenomena of burning of a certain phase conductor, burning of a switch, even single-phase burning of a distribution transformer and the like caused by three-phase unbalance, improving the power supply efficiency and the electrical efficiency of the distribution transformer, and reducing the line voltage drop and the power consumption. The charging pile can also be used for charging the electric automobile according to the maximum charging power under the condition of meeting the three-phase current balance as much as possible.

Based on the same inventive concept, the embodiment of the application also provides a current regulating device. Fig. 4 is a schematic structural diagram of a current regulator according to an embodiment of the present application, and as shown in fig. 4, the current regulator according to the embodiment includes: a determination module 110 and an adjustment module 120, wherein:

the determination module 110 is configured to: determining the upper limit of the load current of each phase according to the load current of each phase in the three-phase branch circuit, the load current capable of being adjusted upwards and the load current capable of being adjusted upwards of each charging pile connected with the three-phase branch circuit;

under the condition that the three-phase unbalance is larger than the unbalance threshold, determining a load current balance interval corresponding to the three-phase balance according to the load current upper limit of each phase;

the adjustment module 120 is configured to: and adjusting the working current of the charging pile connected with each phase according to the expected load current of each phase.

As an optional implementation manner of this embodiment of this application, the determining module 110 is further configured to:

after determining the three-phase imbalance degree according to the load current upper limit of each phase, before the adjusting module 120 adjusts the working current of each charging pile connected to each phase according to the expected load current of each phase, and under the condition that the three-phase imbalance degree is smaller than or equal to the imbalance degree threshold value, determining the load current upper limit of each phase as the expected load current of the phase.

As an optional implementation manner of this embodiment, the determining module 110 is specifically configured to:

As an optional implementation manner of this embodiment, the load current balance interval is [ Iavg (1-Th) ] _R )，Iavg*(1+Th _R )]Where Iavg represents the average value of the upper limit of the load current of each phase, th _R Representing the unbalancing threshold.

when the upper limit of the load current of the phase is smaller than the upper limit current of the load current balance section, the desired load current of the phase is equal to the upper limit of the load current of the phase.

As an optional implementation manner of the embodiment of the present application, the adjusting the working current of the charging pile connected to each phase according to the expected load current of each phase includes:

The technical effect of the current adjusting device provided in this embodiment is similar to that of the method embodiments described above, and is not described herein again.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

Based on the same inventive concept, the embodiment of the application also provides the electronic equipment. Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application, and as shown in fig. 5, the electronic device according to the embodiment includes: a memory 210 and a processor 220, the memory 210 for storing computer programs; the processor 220 is adapted to perform the methods of the above-described method embodiments when invoking the computer program.

The electronic device provided by this embodiment may perform the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

Embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the method described in the foregoing method embodiments.

The embodiment of the application further provides a computer program product, and when the computer program product runs on the charging pile, the method of the above method embodiment is implemented when the charging pile is executed.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in or transmitted over a computer-readable storage medium. The computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optics, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, or a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

One of ordinary skill in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by hardware related to instructions of a computer program, which may be stored in a computer-readable storage medium, and when executed, may include the processes of the above method embodiments. And the aforementioned storage medium may include: various media capable of storing program codes, such as ROM or RAM, magnetic or optical disks, etc.

The naming or numbering of the steps appearing in the present application does not mean that the steps in the method flow have to be executed in the chronological/logical order indicated by the naming or numbering, and the named or numbered process steps may be executed in a modified order depending on the technical purpose to be achieved, as long as the same or similar technical effects are achieved.

In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/device and method may be implemented in other ways. For example, the above-described apparatus/device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

In the description of the present application, a "/" indicates a relationship in which the objects associated before and after are an "or", for example, a/B may indicate a or B; in the present application, "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural.

Also, in the description of the present application, "a plurality" means two or more than two unless otherwise specified. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, described with reference to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method of current regulation, comprising:

determining the upper limit of the load current of each phase according to the load current of each phase in the three-phase branch circuit, the load current capable of being adjusted upwards and the load current capable of being adjusted upwards of each charging pile connected with the three-phase branch circuit;

2. The method of claim 1, wherein after determining the degree of unbalance of the three phases according to the upper load current limits of the phases, the method further comprises, before adjusting the operating currents of the charging poles connected to the phases according to the desired load currents of the phases:

and determining the upper limit of the load current of each phase as the expected load current of the phase under the condition that the three-phase unbalance is less than or equal to the unbalance threshold value.

3. The method of claim 1, wherein determining the upper load current limit for each phase based on the sum of the load current for each phase in the three-phase branch, the adjustable load current, and the adjustable current for each connected charging post comprises:

determining the actual adjustable current of each phase according to the sum of the adjustable load current of each phase in the three-phase branch and the adjustable current of each connected charging pile;

4. A method according to claim 3, characterized in that the actual adjustable current for each phase is the smaller of the sum of the adjustable load current for that phase and the adjustable current of the connected charging pole.

5. A method according to claim 1, wherein the load current balance interval is [ Iavg (1-Th) ] _R )，Iavg*(1+Th _R )]Where Iavg represents the average value of the upper limit of the load current of each phase, th _R Representing the unbalancing threshold.

6. The method of claim 1, wherein for each phase, when the lower load current limit of the phase is greater than the upper limit current of the load current balancing interval, the desired load current of the phase is equal to the lower load current limit of the phase;

7. The method of claim 1, wherein the lower load current limit for each phase is the load current for that phase minus the sum of the down-regulated currents of the connected charging posts.

8. The method of any one of claims 1 to 7, wherein said adjusting the operating current of the charging post to which each phase is connected according to the desired load current of each phase comprises:

9. A current regulating device, comprising: a determination module and an adjustment module, wherein:

10. An electronic device, comprising: a memory for storing a computer program and a processor; the processor is adapted to perform the method of any of claims 1-8 when the computer program is invoked.