Light storage and charging integrated charging system

Abstract

The invention discloses a light storage and charging integrated charging system, and relates to the technical field of new energy storage. According to the invention, an energy storage battery is electrically connected to a DCDC charging module through an energy storage battery interface, and a photovoltaic panel is also electrically connected to the DCDC charging module through a photovoltaic panel interface; the DCDC charging module is controlled by the main controller, so that direct-current energy supply of the energy storage battery and / or the photovoltaic panel to the charging pile is realized, and direct-current charging of the photovoltaic panel to the energy storage battery is realized; the main controller collects the residual electric quantity and temperature of the energy storage battery, the real-time power generation power of the photovoltaic panel and the real-time charging power of the charging pile in real time, and the stability of the real-time charging power of the charging pile is kept. According to the invention, energy of the energy storage battery and the photovoltaic panel is managed through the master controller, independent operation can be realized without a power grid, and stable charging of the charging pile is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy storage, and in particular relates to a photovoltaic storage and charging integrated charging system. Background Art

[0002] With the popularization of electric vehicles, the demand for charging piles is growing, but the insufficient capacity of the power grid makes it impossible to install charging piles. At the same time, the development of photovoltaic energy storage has evolved into a photovoltaic storage and charging system. The integrated photovoltaic storage and charging solution is to organically combine photovoltaic power generation, energy storage systems and charging facilities to form an intelligent, efficient and reliable energy management system. The existing photovoltaic storage and charging system has high transmission construction costs for the power grid, and the electric energy needs to be repeatedly converted from DC to AC, resulting in serious power waste. Summary of the invention

[0003] The purpose of the present invention is to provide an integrated photovoltaic storage and charging system, which can manage the energy of energy storage batteries and photovoltaic panels through a main controller, operate independently from the power grid and achieve stable charging of charging piles.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention provides a photovoltaic storage and charging integrated charging system, comprising:

[0006] The energy storage battery is electrically connected to the DCDC charging module through the energy storage battery interface, and the photovoltaic panel is also electrically connected to the DCDC charging module through the photovoltaic panel interface;

[0007] The DCDC charging module is controlled by the main controller to realize the DC power supply from the energy storage battery and / or photovoltaic panel to the charging pile, and the DC charging from the photovoltaic panel to the energy storage battery;

[0008] The main controller collects the remaining power and temperature of the energy storage battery, the real-time power generation power of the photovoltaic panel and the real-time charging power of the charging pile in real time to keep the real-time charging power of the charging pile stable.

[0009] Furthermore, when the energy storage battery and the photovoltaic panel are simultaneously charging the charging pile through the DCDC charging module, the main controller controls the discharge power of the energy storage battery in real time and keeps the real-time charging power of the charging pile stable based on the remaining power and temperature of the energy storage battery, the real-time power generation power of the photovoltaic panel and the real-time charging power of the charging pile collected in real time.

[0010] Furthermore, the step of controlling the discharge power of the energy storage battery in real time and maintaining the stability of the real-time charging power of the charging pile includes:

[0011] According to the remaining power and temperature of the energy storage battery, the maximum steady-state discharge power of the energy storage battery at the current moment is obtained;

[0012] According to the continuously collected power generation of the photovoltaic panels, the power generation record of the photovoltaic panels in the current period is obtained;

[0013] Estimate the estimated power generation state of the photovoltaic panels in future periods based on the power generation records of the photovoltaic panels in the current period;

[0014] According to the real-time charging power of the charging pile at the current moment, the maximum instantaneous discharge power and maximum steady-state discharge power of the energy storage battery, and the estimated power generation state of the photovoltaic panel in the future period, the planned discharge power of the energy storage battery at the next moment is obtained to maintain the stability of the real-time charging power of the charging pile.

[0015] Furthermore, the step of estimating the estimated power generation state of the photovoltaic panel in the future time period based on the power generation record of the photovoltaic panel in the current time period includes:

[0016] Divide the current time period into multiple time period units;

[0017] According to the power generation record of the photovoltaic panel in the current time period, the power generation sub-record of the photovoltaic panel in each time period unit is obtained;

[0018] Extracting multiple types of power generation characteristics of the power generation sub-records of the photovoltaic panels in each time period unit;

[0019] According to the multiple types of power generation characteristics of the photovoltaic panel in each time period unit, the estimated power generation characteristics of the photovoltaic panel in multiple types in the future time period are obtained;

[0020] The estimated power generation state of the photovoltaic panels in the future period is obtained by fitting the estimated power generation characteristics of multiple types of photovoltaic panels in the future period.

[0021] Furthermore, the step of extracting multiple types of power generation characteristics of the power generation sub-records of the photovoltaic panel in each time period unit includes:

[0022] The mean power, maximum instantaneous power, minimum instantaneous power, power standard deviation, maximum instantaneous power change rate, minimum instantaneous power change rate and / or mean instantaneous power change rate of the photovoltaic panel in each time period unit are used as the power generation characteristics of the photovoltaic panel in each time period unit.

[0023] Furthermore, the step of estimating multiple types of estimated power generation characteristics of the photovoltaic panel in future time periods based on multiple types of power generation characteristics of the photovoltaic panel in each time period unit includes:

[0024] According to the multiple types of power generation characteristics of the photovoltaic panel in each time period unit and the multiple types of power generation characteristics in the time period unit at the current moment, multiple time period units that are consistent with the power generation state at the current moment are selected;

[0025] According to the multiple types of power generation characteristics in multiple time period units that are consistent with the power generation state at the current moment, multiple types of estimated power generation characteristics of the photovoltaic panel in the future time period are estimated.

[0026] Furthermore, the step of selecting a plurality of time period units that are consistent with the power generation state at the current moment according to the plurality of types of power generation characteristics of the photovoltaic panel in each time period unit and the plurality of types of power generation characteristics in the time period unit at the current moment includes:

[0027] Selecting a number of time period units from the plurality of time period units as marking time period units;

[0028] The accumulated sum of the differences of each type of power generation characteristics between two time period units is used as the power generation difference state between the time period units, and the power generation difference state between each marked time period unit and other time period units is calculated and obtained;

[0029] Divide each other time period unit and the marked time period unit with the smallest power generation difference state into the same time period combination;

[0030] Determine whether the power generation states of the time period units included in each time period combination are consistent;

[0031] If yes, the time period units included in the time period combination at the current moment are taken as multiple time period units that are consistent with the power generation state at the current moment;

[0032] If not, then re-dividing and selecting a plurality of time period units that are consistent with the power generation state at the current moment.

[0033] Furthermore, the step of judging whether the power generation states of the time period units included in each time period combination are consistent includes:

[0034] Calculate and obtain the mean value of each type of power generation characteristics of all time period units in each time period combination;

[0035] In each time period combination, it is determined whether the time period unit having the smallest power generation difference state with the power generation characteristic mean of each type of all time period units in the time period combination is the corresponding marked time period unit;

[0036] If yes, it is determined that the power generation states of the time period units included in the time period combination are consistent;

[0037] If not, it is determined that the power generation states of the time period units included in the time period combination are inconsistent.

[0038] Furthermore, the step of re-dividing and selecting a plurality of time period units that are consistent with the power generation state at the current moment includes:

[0039] The time period unit with the smallest power generation difference state between the power generation characteristic mean of each type of all time period units in each time period combination and the time period unit in the time period combination is selected as the time period unit to be reselected;

[0040] The time period combinations are recalculated according to the reselected time period units, and it is determined whether the power generation states of the time period units included in each time period combination are consistent.

[0041] Furthermore, the step of obtaining the planned discharge power of the energy storage battery at the next moment according to the real-time charging power of the charging pile at the current moment, the maximum instantaneous discharge power and the maximum steady-state discharge power of the energy storage battery, and the estimated power generation state of the photovoltaic panel in the future time period, so as to maintain the stability of the real-time charging power of the charging pile, includes:

[0042] Get the charging power of the charging pile at the current moment;

[0043] The estimated power generation state of the photovoltaic panel at the next moment is obtained according to the estimated power generation state of the photovoltaic panel in the future period;

[0044] Within the maximum instantaneous discharge power range of the energy storage battery, the difference between the charging power of the charging pile at the current moment and the estimated power generation power of the photovoltaic panel at the next moment is used as the planned discharge power of the energy storage battery at the next moment.

[0045] The present invention realizes the direct current energy flow between the energy storage battery, the charging pile and the photovoltaic panel through the DCDC charging module, avoids the energy waste caused by AC-DC conversion, and accurately estimates the power generation state of the photovoltaic panel through the main controller, accurately adjusts the energy output of the energy storage battery, and realizes the stable charging of the charging pile.

[0046] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0048] Figure 1 A schematic diagram of functional modules and information energy flow of a photovoltaic storage and charging integrated charging system in one embodiment of the present invention;

[0049] Figure 2 A schematic diagram of a process flow of a main controller according to an embodiment of the present invention;

[0050] Figure 3This is a schematic diagram of the step flow of step S3 in one embodiment of the present invention;

[0051] Figure 4 A schematic diagram of a step flow chart of step S34 in an embodiment of the present invention;

[0052] Figure 5 This is a schematic diagram of a step flow chart of step S341 in an embodiment of the present invention;

[0053] Figure 6 This is a schematic diagram of the step flow of step S4 in one embodiment of the present invention;

[0054] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0055] 1-Energy storage battery, 2-Energy storage battery interface, 3-DCDC charging module, 4-Charging pile, 5-Photovoltaic panel interface, 6-Photovoltaic panel, 7-Main controller. DETAILED DESCRIPTION

[0056] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0057] It should be noted that the terms "first", "second", etc. in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0058] See also Figures 1 to 2 As shown, the present invention provides an integrated photovoltaic storage and charging system, which includes, from the functional module, an energy storage battery 1, an energy storage battery interface 2, a DCDC charging module 3, a charging pile 4, a photovoltaic panel interface 5, a photovoltaic panel 6 and a main controller 7. The energy storage battery 1 in this system is electrically connected to the DCDC charging module 3 through the energy storage battery interface 2, and the photovoltaic panel 6 is also electrically connected to the DCDC charging module 3 through the photovoltaic panel interface 5. The DCDC charging module 3 is controlled by the main controller 7 to realize the DC power supply of the energy storage battery 1 and / or the photovoltaic panel 6 to the charging pile 6, and the DC charging of the photovoltaic panel 6 to the energy storage battery 1. The main controller 7 collects the remaining power and temperature of the energy storage battery 1, the real-time power generation power of the photovoltaic panel and the real-time charging power of the charging pile 4 in real time to keep the real-time charging power of the charging pile 4 stable.

[0059] See also Figure 2As shown, when the energy storage battery 1 and the photovoltaic panel 6 are simultaneously charging the charging pile 4 through the DCDC charging module 3, the main controller 7 controls the discharge power of the energy storage battery 1 in real time and keeps the real-time charging power of the charging pile 4 stable according to the remaining power and temperature of the energy storage battery 1, the real-time power generation power of the photovoltaic panel 6 and the real-time charging power of the charging pile 4 collected in real time. During operation, the main controller 7 can first execute step S1 to obtain the maximum steady-state discharge power of the energy storage battery at the current moment according to the remaining power and temperature of the energy storage battery. Next, step S2 can be executed to obtain the power generation power record of the photovoltaic panel in the current time period according to the continuously collected power generation power of the photovoltaic panel. Next, step S3 can be executed to estimate the estimated power generation power state of the photovoltaic panel in the future time period according to the power generation power record of the photovoltaic panel in the current time period.

[0060] See also Figure 2 and 6 As shown, step S4 can be finally executed to obtain the planned discharge power of the energy storage battery at the next moment according to the real-time charging power of the charging pile at the current moment, the maximum instantaneous discharge power and the maximum steady-state discharge power of the energy storage battery, and the estimated power generation state of the photovoltaic panel in the future time period, so as to maintain the stability of the real-time charging power of the charging pile. Even if it is disconnected from the power grid, the stable discharge of the charging pile to the vehicle can still be achieved. Specifically, step S41 can be first executed to obtain the charging power of the charging pile 4 at the current moment. Next, step S42 can be executed to obtain the estimated power generation power of the photovoltaic panel 6 at the next moment according to the estimated power generation power state of the photovoltaic panel 6 in the future time period. Finally, step S43 can be executed to use the difference between the charging power of the charging pile 4 at the current moment and the estimated power generation power of the photovoltaic panel 6 at the next moment as the planned discharge power of the energy storage battery 1 at the next moment within the maximum instantaneous discharge power range of the energy storage battery 1.

[0061] See also Figure 3 As shown, in the process of the photovoltaic panel 6 stably controlling the output power of the charging pile 4, step S31 can be first executed to divide the current time period into multiple time period units. Next, step S32 can be executed to obtain the power generation sub-record of the photovoltaic panel 6 in each time period unit according to the power generation record of the photovoltaic panel in the current time period. Next, step S33 can be executed to extract multiple types of power generation characteristics of the power generation sub-record of the photovoltaic panel 6 in each time period unit. The mean power, maximum instantaneous power, minimum instantaneous power, power standard deviation, maximum instantaneous power change rate, minimum instantaneous power change rate and / or the mean instantaneous power change rate of the photovoltaic panel 6 in each time period unit are used as the power generation characteristics of the photovoltaic panel 6 in each time period unit.

[0062] See also Figure 3As shown, after extracting the power generation characteristics, step S34 can be executed next to estimate multiple types of estimated power generation characteristics of the photovoltaic panel 6 in the future time period according to multiple types of power generation characteristics of the photovoltaic panel in each time period unit. Step S35 can be executed next to fit multiple types of estimated power generation characteristics of the photovoltaic panel 6 in the future time period to obtain the estimated power generation state of the photovoltaic panel 6 in the future time period.

[0063] See also Figure 3 and 4 As shown, in the process of estimating the power generation characteristics of the photovoltaic panel 6 in the future time period, step S341 can be first executed to select multiple time period units that are consistent with the power generation state at the current moment according to multiple types of power generation characteristics of the photovoltaic panel in each time period unit and multiple types of power generation characteristics in the time period unit at the current moment. Next, step S342 can be executed to estimate multiple types of estimated power generation characteristics of the photovoltaic panel in the future time period according to multiple types of power generation characteristics in multiple time period units that are consistent with the power generation state at the current moment.

[0064] Please refer to Figures 4 and 5. In the process of selecting multiple time period units that are consistent with the power generation state at the current moment, step S3411 can be first performed to select several of the multiple time period units as marked time period units. Next, step S3412 can be performed to take the cumulative sum of the difference of each type of power generation characteristics between two time period units as the power generation difference state between the time period units, and calculate the power generation difference state between each marked time period unit and other time period units. Next, step S3413 can be performed to divide each other time period unit and the marked time period unit with the smallest power generation difference state into the same time period combination. Next, step S3414 can be performed to calculate and obtain the mean value of each type of power generation characteristics of all time period units in each time period combination. Next, step S3415 can be performed to determine in each time period combination whether the time period unit with the smallest power generation difference state with the mean value of each type of power generation characteristics of all time period units in the time period combination is the corresponding marked time period unit. If so, step S3416 can be performed next to determine that the power generation state of the time period units contained in the time period combination is consistent; the time period units contained in the time period combination at the current moment are taken as multiple time period units that are consistent with the power generation state at the current moment.

[0065] If the above judgment is otherwise, step S3417 can be executed next to determine that the power generation states of the time period units included in the time period combination are not consistent. Step S3418 can be executed next to use the time period unit with the smallest power generation difference state between each time period combination and the mean value of each type of power generation characteristics of all time period units in the time period combination as the reselected time period unit. Steps S3412 to S3415 can be executed next to recalculate and divide the time period combination according to the reselected time period unit and determine whether the power generation states of the time period units included in each time period combination are consistent. Through continuous iteration, the time period combination with highly consistent power generation states is continuously optimized.

[0066] In order to supplement the implementation process of the above steps S3411 to S3418, the source code of some functional modules is provided, and the explanation is compared in the comment section. In order to avoid the leakage of data involving commercial secrets, some data that does not affect the implementation of the solution are desensitized, the same below.

[0067] #include <iostream>

[0068] #include <vector>

[0069] #include <algorithm>

[0070] #include <numeric>

[0071] #include <cmath>

[0072] #include <limits>

[0073] / / Power generation characteristic structure

[0074] struct PowerFeatures{

[0075] double averagePower; / / average power

[0076] double maxPower; / / maximum instantaneous power

[0077] double minPower; / / Minimum instantaneous power

[0078] double powerStdDev; / / power standard deviation

[0079] double maxPowerChangeRate; / / maximum instantaneous power change rate

[0080] double minPowerChangeRate; / / minimum instantaneous power change rate

[0081] double avgPowerChangeRate; / / Instantaneous power change rate average

[0082] };

[0083] / / Calculate the power generation difference between the two time periods

[0084] double calculateDifference(const PowerFeatures&feature1,constPowerFeatures&feature2){

[0085] doublediffAveragePower=std::abs(feature1.averagePower-feature2.averagePower);

[0086] doublediffMaxPower=std::abs(feature1.maxPower-feature2.maxPower);

[0087] doublediffMinPower=std::abs(feature1.minPower-feature2.minPower);

[0088]

[0089] [](double sum,const PowerFeatures&feature){return sum+feature.minPower;}) / size;

[0090] / / Calculate the power standard deviation

[0091] meanFeatures.powerStdDev=std::accumulate(group.begin(),group.end(),0.0,

[0092] [](double sum,const PowerFeatures&feature){return sum+feature.powerStdDev;}) / size;

[0093] / / Calculate the maximum instantaneous power change rate

[0094] meanFeatures.maxPowerChangeRate=std::accumulate(group.begin(),group.end(),0.0,

[0095] [](double sum,const PowerFeatures&feature){return sum+feature.maxPowerChangeRate;}) / size;

[0096] / / Calculate the minimum instantaneous power change rate

[0097] meanFeatures.minPowerChangeRate=std::accumulate(group.begin(),group.end(),0.0,

[0098] [](double sum,const PowerFeatures&feature){return sum+feature.minPowerChangeRate;}) / size;

[0099] / / Calculate the mean instantaneous power change rate

[0100] meanFeatures.avgPowerChangeRate=std::accumulate(group.begin(),group.end(),0.0,

[0101] [](double sum,const PowerFeatures&feature){return sum+feature.avgPowerChangeRate;}) / size;

[0102] return meanFeatures;

[0103] }

[0104] / / Select the time period unit that is consistent with the current power generation status

[0105] std::vector <powerfeatures>selectConsistentUnits(const std::vector <powerfeatures>&allFeatures,const PowerFeatures¤tFeature){

[0106] std::vector <powerfeatures>consistentUnits;

[0107] std::vector<std::vector <powerfeatures>>groups;

[0108]

[0109]

[0110] }

[0111] }

[0112] / / Find the time period combination of the current time

[0113] double minDifference=std::numeric_limits <double>::max();

[0114] size_t groupIndex = 0;

[0115] for(size_t i=0;i <groups.size();++i){

[0116] doubledifference=calculateDifference(currentFeature,calculateMeanFeatures(groups[i]));

[0117] if(difference <minDifference){

[0118] minDifference = difference;

[0119] groupIndex = i;

[0120] }

[0121] }

[0122] / / Return the time period unit that is consistent with the current power generation status

[0123] consistentUnits=groups[groupIndex];

[0124] return consistentUnits;

[0125] }

[0126] int main(){

[0127] / / Example: Power generation characteristics of photovoltaic panels in all time units

[0128] std::vector <powerfeatures>allFeatures={

[0129] {2000.0,2200.0,1800.0,150.0,100.0,-50.0,25.0},

[0130] {2100.0,2300.0,1900.0,160.0,110.0,-60.0,30.0},

[0131] {1900.0,2100.0,1700.0,140.0,90.0,-40.0,20.0},

[0132] {2050.0,2250.0,1850.0,155.0,105.0,-55.0,27.5},

[0133] {1950.0,2150.0,1750.0,145.0,95.0,-45.0,22.5}

[0134] };

[0135] / / Power generation characteristics at the current moment

[0136] PowerFeatures currentFeature={2000.0,2200.0,1800.0,150.0,100.0,-50.0,25.0};

[0137]

[0138] Function summary:

[0139] The above code implements a photovoltaic panel power generation state consistency analysis function. The code module first selects multiple time period units that are consistent with the current power generation state. Then, several time period units are initially selected as marked time period units, and the time period units are divided into different combinations according to the power generation difference state. Next, the power generation characteristic mean of the time period units in each combination is calculated, and it is determined whether the time period unit with the smallest difference in the mean characteristic in the combination is the marked time period unit. If the consistency condition is met, the time period combination of the current moment is returned; otherwise, the marked time period unit is reselected and the combination is re-divided. The above code realizes the accurate analysis of the power generation state of the photovoltaic panel through dynamic division and consistency judgment, and provides reliable data support for subsequent power generation estimation and control.

[0140] The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the device, system, method and computer program product according to multiple embodiments of the present application. In this regard, each square frame in the flow chart or block diagram can represent a part of a module, program segment or instruction, and a part of the module, program segment or instruction includes one or more executable instructions for realizing the logical function of the specification. In some alternative implementations, the functions marked in the square frame can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square frames can actually be executed substantially in parallel, and they can also be executed in reverse order sometimes, depending on the functions involved.

[0141] It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented by hardware that performs the corresponding function or action, such as a circuit or ASIC (Application Specific Integrated Circuit), or can be implemented by a combination of hardware and software, such as firmware.

[0142] Although the present invention is described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0143] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.< / powerfeatures> < / double> < / powerfeatures> < / powerfeatures> < / powerfeatures> < / powerfeatures> < / limits> < / cmath> < / numeric> < / algorithm> < / vector> < / iostream>

Claims

1. A photovoltaic storage and charging integrated charging system, characterized in that: include, The energy storage battery is electrically connected to the DCDC charging module through the energy storage battery interface, and the photovoltaic panel is also electrically connected to the DCDC charging module through the photovoltaic panel interface; The DCDC charging module is controlled by the main controller to realize the DC power supply from the energy storage battery and / or photovoltaic panel to the charging pile, and the DC charging from the photovoltaic panel to the energy storage battery; The main controller collects the remaining power and temperature of the energy storage battery, the real-time power generation power of the photovoltaic panel and the real-time charging power of the charging pile in real time to keep the real-time charging power of the charging pile stable.

2. The system according to claim 1, characterized in that When the energy storage battery and photovoltaic panel are charging the charging pile through the DCDC charging module at the same time, the main controller controls the discharge power of the energy storage battery in real time and keeps the real-time charging power of the charging pile stable based on the remaining power and temperature of the energy storage battery, the real-time power generation power of the photovoltaic panel and the real-time charging power of the charging pile collected in real time.

3. The system according to claim 2, characterized in that The step of controlling the discharge power of the energy storage battery in real time and maintaining the stability of the real-time charging power of the charging pile, include, According to the remaining power and temperature of the energy storage battery, the maximum steady-state discharge power of the energy storage battery at the current moment is obtained; According to the continuously collected power generation of the photovoltaic panels, the power generation record of the photovoltaic panels in the current period is obtained; Estimate the estimated power generation state of the photovoltaic panels in future periods based on the power generation records of the photovoltaic panels in the current period; According to the real-time charging power of the charging pile at the current moment, the maximum instantaneous discharge power and maximum steady-state discharge power of the energy storage battery, and the estimated power generation state of the photovoltaic panel in the future period, the planned discharge power of the energy storage battery at the next moment is obtained to maintain the stability of the real-time charging power of the charging pile.

4. The system according to claim 3, characterized in that The step of estimating the estimated power generation state of the photovoltaic panel in the future period based on the power generation record of the photovoltaic panel in the current period includes: Divide the current time period into multiple time period units; According to the power generation record of the photovoltaic panel in the current time period, the power generation sub-record of the photovoltaic panel in each time period unit is obtained; Extracting multiple types of power generation characteristics of the power generation sub-records of the photovoltaic panels in each time period unit; According to the multiple types of power generation characteristics of the photovoltaic panel in each time period unit, the estimated power generation characteristics of the photovoltaic panel in multiple types in the future time period are obtained; The estimated power generation state of the photovoltaic panels in the future period is obtained by fitting the estimated power generation characteristics of multiple types of photovoltaic panels in the future period.

5. The system according to claim 4, characterized in that The step of extracting multiple types of power generation characteristics of the power generation sub-records of the photovoltaic panel in each time period unit includes: The mean power, maximum instantaneous power, minimum instantaneous power, power standard deviation, maximum instantaneous power change rate, minimum instantaneous power change rate and / or mean instantaneous power change rate of the photovoltaic panel in each time period unit are used as the power generation characteristics of the photovoltaic panel in each time period unit.

6. The system according to claim 4, characterized in that The step of estimating multiple types of estimated power generation characteristics of the photovoltaic panel in future time periods based on multiple types of power generation characteristics of the photovoltaic panel in each time period unit includes: According to the multiple types of power generation characteristics of the photovoltaic panel in each time period unit and the multiple types of power generation characteristics in the time period unit at the current moment, multiple time period units that are consistent with the power generation state at the current moment are selected; According to the multiple types of power generation characteristics in multiple time period units that are consistent with the power generation state at the current moment, multiple types of estimated power generation characteristics of the photovoltaic panel in the future time period are estimated.

7. The system according to claim 6, characterized in that The step of selecting multiple time period units that are consistent with the power generation state at the current moment according to multiple types of power generation characteristics of the photovoltaic panel in each time period unit and multiple types of power generation characteristics in the time period unit at the current moment includes: Selecting a number of time period units from the plurality of time period units as marking time period units; The accumulated sum of the differences of each type of power generation characteristics between two time period units is used as the power generation difference state between the time period units, and the power generation difference state between each marked time period unit and other time period units is calculated and obtained; Divide each other time period unit and the marked time period unit with the smallest power generation difference state into the same time period combination; Determine whether the power generation states of the time period units included in each time period combination are consistent; If yes, the time period units included in the time period combination at the current moment are taken as multiple time period units that are consistent with the power generation state at the current moment; If not, then re-dividing and selecting a plurality of time period units that are consistent with the power generation state at the current moment.

8. The system according to claim 7, characterized in that The step of judging whether the power generation states of the time period units included in each time period combination are consistent includes: Calculate and obtain the mean value of each type of power generation characteristics of all time period units in each time period combination; In each time period combination, it is determined whether the time period unit having the smallest power generation difference state with the power generation characteristic mean of each type of all time period units in the time period combination is the corresponding marked time period unit; If yes, it is determined that the power generation states of the time period units included in the time period combination are consistent; If not, it is determined that the power generation states of the time period units included in the time period combination are inconsistent.

9. The system according to claim 7, characterized in that The step of re-dividing and selecting a plurality of time period units that are consistent with the power generation state at the current moment, include, The time period unit with the smallest power generation difference state between the power generation characteristic mean of each type of all time period units in each time period combination and the time period unit in the time period combination is selected as the time period unit to be reselected; The time period combinations are recalculated according to the reselected time period units, and it is determined whether the power generation states of the time period units included in each time period combination are consistent.

10. The system according to claim 1, characterized in that The step of obtaining the planned discharge power of the energy storage battery at the next moment according to the real-time charging power of the charging pile at the current moment, the maximum instantaneous discharge power and the maximum steady-state discharge power of the energy storage battery, and the estimated power generation state of the photovoltaic panel in the future time period, so as to maintain the stability of the real-time charging power of the charging pile, includes: Get the charging power of the charging pile at the current moment; The estimated power generation state of the photovoltaic panel at the next moment is obtained according to the estimated power generation state of the photovoltaic panel in the future period; Within the maximum instantaneous discharge power range of the energy storage battery, the difference between the charging power of the charging pile at the current moment and the estimated power generation power of the photovoltaic panel at the next moment is used as the planned discharge power of the energy storage battery at the next moment.

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