Charging pile load management method and device, computer equipment and storage medium

Abstract

The invention relates to the technical field of electric vehicle charging, and discloses a charging pile load management method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining the electricity selling power when a charging pile is started; starting the charging state of the charging pile based on the magnitude relationship between the electricity selling power and the preset minimum charging power; the charging power of the charging pile is dynamically adjusted on the basis of the external photovoltaic power generation power and the load power of the area where the charging pile belongs, the charging power of the charging pile is dynamically adjusted on the basis of the external photovoltaic power generation power and the load power of the area where the charging pile belongs, and the photovoltaic power generation power can be utilized to charge the charging pile to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the field of household energy management and electric vehicle charging technology, and in particular to a charging pile load management method, device, computer equipment and storage medium. Background Art

[0002] In the field of electric vehicle charging, with the popularity of electric vehicles, the demand for household photovoltaic AC charging piles is growing. Existing household AC charging piles usually do not have the ability to dynamically adjust the charging power according to the real-time load of the household power system. This results in that during the peak hours of household electricity consumption, the charging pile may not be able to effectively manage its charging power, increase the burden on the household power system, and may even cause overload and tripping. Although smart charging piles provide the convenience of remote control, users are still required to manually adjust the charging plan to avoid conflicts with the use of other high-power devices in the home. This increases the management burden on users and reduces the automation and intelligence level of charging piles.

[0003] The current smart charging piles still rely on the user's settings for charging time and power. If the user sets them improperly, the charging piles may not be able to effectively utilize the idle capacity of the home power system, affecting the charging efficiency. The charging piles in the prior art usually do not directly interact with the electric meter for data, and cannot obtain the usage of the home power system in real time, so it is impossible to make corresponding adjustments to optimize the charging efficiency. During the dynamic power adjustment or shutdown process, the existing charging piles may not ensure the safety and reliability of the home power system, increasing the safety risk. The charging piles in the prior art may face high costs in implementing dynamic power management and other intelligent functions, which may affect their market competitiveness. In the prior art, the power of photovoltaic power generation may not be fully utilized, especially when the photovoltaic power fluctuates greatly, it is difficult to achieve dynamic power adjustment, resulting in the inability to maximize the use of photovoltaic power generation to charge electric vehicles.

[0004] In summary, the existing technology has made certain progress in the field of electric vehicle charging, but it still has the following shortcomings and disadvantages:

[0005] 1. Difficulty in fixing and adjusting power: Traditional charging piles use an electric gun design with fixed output power. It is impossible to adjust the output power of the electric gun according to the rated power of new energy vehicles, resulting in low charging efficiency.

[0006] 2. It is difficult to fully utilize photovoltaic power generation: When photovoltaic power generation fluctuates greatly, it is difficult to achieve dynamic power adjustment and it is impossible to maximize the use of photovoltaic power.

[0007] 3. Lack of real-time load power adjustment capability: The charging power cannot be dynamically adjusted according to the real-time load of the household power system. During peak hours of electricity consumption, the burden on the household power system is easily increased, resulting in overload and tripping, which poses a safety hazard. Summary of the invention

[0008] In view of this, the present invention provides a charging pile load management method, device, computer equipment and storage medium to solve the problem that the charging pile cannot dynamically adjust the charging power according to the photovoltaic power during charging and the photovoltaic power is insufficiently utilized.

[0009] In a first aspect, the present invention provides a charging pile load management method, the method comprising:

[0010] Get the power sold when the charging pile is started;

[0011] The charging state of the charging pile is started based on the relationship between the power sold and the preset minimum charging power;

[0012] The charging power of the charging pile is dynamically adjusted based on the external photovoltaic power generation power and the load power of the area where the charging pile belongs.

[0013] A charging pile load management method provided by the present invention obtains the electricity selling power when the charging pile is started; starts the charging state of the charging pile based on the relationship between the electricity selling power and a preset minimum charging power; and dynamically adjusts the charging power of the charging pile based on the external photovoltaic power generation power and the load power of the area to which the charging pile belongs. The photovoltaic power generation power can be used to charge the charging pile to the maximum extent, solving the problem that the charging pile cannot dynamically adjust the charging power according to the photovoltaic power during charging and the photovoltaic power is insufficiently utilized.

[0014] In an optional implementation, starting the charging state of the charging pile based on the magnitude relationship between the electricity selling power and the preset minimum charging power includes:

[0015] When the electricity selling power is greater than the preset minimum charging power, the charging state of the charging pile is started with the electricity selling power.

[0016] The present invention provides a charging pile load management method. When the electricity selling power is greater than the preset minimum charging power, the charging state of the charging pile is started with the electricity selling power, so as to make full use of the electricity on the grid and avoid waste. At the same time, it can also quickly respond to charging needs and improve charging efficiency.

[0017] In an optional implementation, the minimum charging power is set in the following manner:

[0018] The ratio of the minimum charging power of the three-phase charging pile to the minimum charging power of the single-phase charging pile is set as the minimum charging power.

[0019] In an optional implementation, dynamically adjusting the charging power of the charging pile based on the external photovoltaic power generation power and the load power of the area to which the charging pile belongs includes:

[0020] When the charging pile starts the charging state, the charging power of the charging pile is increased with a first preset incremental step size;

[0021] After each power increase, the sum of the load power of the area to which the charging pile belongs and the charging power of the charging pile is calculated, and the charging power of the charging pile is increased or reduced based on the relationship between the external photovoltaic power generation power and the sum of the powers. The power purchased from the power grid equals the preset threshold and is used as the balance point for not buying electricity from the power grid.

[0022] In an optional implementation, increasing the charging power of the charging pile or reducing the charging power of the charging pile based on the magnitude relationship between the external photovoltaic power generation power and the sum of the powers includes:

[0023] When the external photovoltaic power generation power is greater than or equal to the sum of the powers, continue to increase the charging power of the charging pile according to the first preset incremental step size;

[0024] When the external photovoltaic power generation power is less than the sum of the powers, the charging power of the charging pile is reduced until the purchased power is equal to the preset threshold.

[0025] The present invention provides a charging pile load management method, which can monitor the load of the power system in the area where the charging pile belongs in real time and dynamically adjust the charging power of the charging pile according to the real-time data of photovoltaic power generation to avoid overload and tripping, while improving charging efficiency. The charging pile can give priority to photovoltaic power when the photovoltaic power generation power is sufficient, and intelligently switch to energy storage or grid power when the photovoltaic power is insufficient, ensuring that the charging needs of electric vehicles are met.

[0026] In an optional implementation, dynamically adjusting the charging power of the charging pile based on the external photovoltaic power generation power and the load power of the area to which the charging pile belongs also includes:

[0027] When the external photovoltaic power generation power is less than the load power of the area where the charging pile belongs, the charging power of the charging pile is reduced until it is maintained at the minimum safe charging power for charging, and an alarm prompting the current photovoltaic power supply is insufficient;

[0028] During the decreasing process of the charging power of the charging pile, if the load power of the area to which the charging pile belongs is lower than the preset power threshold, the decreasing process of the charging power of the charging pile is suspended and the charging power of the charging pile is increased with a second preset incremental step size to maintain a balance point without buying electricity from the power grid.

[0029] The present invention provides a charging pile load management method. When the external photovoltaic power generation power is less than the load power of the area to which the charging pile belongs, the charging power of the charging pile is reduced until it is maintained at the minimum safe charging power for charging, and an alarm prompt of insufficient current photovoltaic power supply is issued to avoid excessive consumption of grid resources, ensure the basic electricity demand of the area to which the charging pile belongs, and wait for the photovoltaic power to recover or the user to manually intervene to adjust the charging plan. During the charging power reduction process of the charging pile, if the load power of the area to which the charging pile belongs is lower than the preset power threshold, the charging power reduction process of the charging pile is suspended and the charging power of the charging pile is increased with a second preset incremental step size, thereby achieving a balance point of not buying electricity from the power grid, making full use of excess electric energy, and improving energy efficiency.

[0030] In an optional implementation, the charging pile load management method further includes:

[0031] Set the household current value of the area where the charging pile belongs and the rated current value of the household circuit breaker of the charging pile;

[0032] When the incoming current value is equal to or higher than a preset percentage of the rated current value of the incoming circuit breaker, the charging power of the charging pile is reduced until the incoming current value is lower than a preset percentage of the rated current value of the incoming circuit breaker.

[0033] The present invention provides a charging pile load management method. When the household current value is equal to or higher than a preset percentage of the rated current value of the household circuit breaker, the electric power of the charging pile is reduced until the household current value is lower than the preset percentage of the rated current value of the household circuit breaker, thereby effectively preventing the household circuit breaker from tripping due to excessive charging power and ensuring the safety of electricity use in the area to which the charging pile belongs.

[0034] In a second aspect, the present invention provides a charging pile load management device, the device comprising:

[0035] The power selling module is used to obtain the power selling when the charging pile is started;

[0036] A charging state starting module, used to start the charging state of the charging pile based on the relationship between the selling power and the preset minimum charging power;

[0037] The charging power dynamic adjustment module is used to dynamically adjust the charging power of the charging pile based on the external photovoltaic power generation power and the load power of the area to which the charging pile belongs.

[0038] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the charging pile load management method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0039] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the charging pile load management method of the first aspect or any corresponding embodiment thereof.

[0040] In a fifth aspect, the present invention provides a computer program product, including computer instructions, which are used to enable a computer to execute the charging pile load management method of the above-mentioned first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 is a flow chart of a charging pile load management method according to an embodiment of the present invention;

[0043] Figure 2 is a flow chart of another charging pile load management method according to an embodiment of the present invention;

[0044] Figure 3 is a flow chart of another charging pile load management method according to an embodiment of the present invention;

[0045] Figure 4 is a structural block diagram of a charging pile load management device according to an embodiment of the present invention;

[0046] Figure 5 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0048] The charging scheme of charging piles mainly involves the following aspects:

[0049] 1. Photovoltaic storage and charging integrated solution: This solution integrates photovoltaic power generation, energy storage system and split charging pile load, and realizes real-time monitoring and management of power generation information and operating status through the data acquisition module of photovoltaic inverter and energy storage system.

[0050] 2. Dynamic power scheduling method for charging piles: This technical solution dynamically adjusts the output power of the charging pile to adapt to the grid load and charging demand by detecting parameters such as the photovoltaic power in the home, the meter power at the grid connection point, and the charging pile power, including the current output power and the minimum allowable output power.

[0051] 3. Intelligent AC pile combining intelligent home load management and photovoltaics: This technical solution collects the current of the inverter output line and the main incoming line of the home power grid through the CT collector, and combines the voltage and current detection module of the charging pile to realize home load power management, dynamically adjust the output power of the charging pile, and ensure the safety of home electricity use.

[0052] 4. Charging pile power dynamic allocation system and method: A charging pile power dynamic allocation system and method are provided, which improves the stability, efficiency and safety of charging and reduces the production cost of charging piles by dynamically allocating the output power of the electric gun.

[0053] In the prior art, photovoltaic power generation may not be fully utilized, especially when the photovoltaic power fluctuates greatly, it is difficult to dynamically adjust the charging power of the charging pile, resulting in the inability to maximize the use of photovoltaic power generation to charge electric vehicles. The embodiment of the present invention provides a charging pile load management method to achieve the effect of monitoring the photovoltaic power generation in real time and dynamically adjusting the charging power of the charging pile according to its fluctuations.

[0054] According to an embodiment of the present invention, an embodiment of a charging pile load management method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0055] In this embodiment, a charging pile load management method is provided, which can be used for a dynamic load management system, including: an AC charging pile, an adaptive inverter, a household electric meter and a control unit, wherein the AC charging pile is connected to the inverter, the household electric meter and the control unit respectively, and the AC charging pile is used as a core execution component for charging an electric vehicle; the inverter is connected to the photovoltaic panel for collecting photovoltaic power generation and realizing data communication with the charging pile; the household electric meter monitors the power consumption of the area (such as a home) to which the charging pile belongs in real time, and the data is fed back to the control unit; the control unit adjusts the charging power of the charging pile according to the data fed back by each component. Figure 1is a flow chart of a charging pile load management method according to an embodiment of the present invention. Figure 1 As shown, the process includes the following steps:

[0056] Step S101, obtaining the electricity selling power when the charging pile is started.

[0057] Specifically, the power sold refers to the power sold to the grid. When the charging pile is started, it first obtains the current power sold through the communication link with the inverter and the household meter.

[0058] Step S102, starting the charging state of the charging pile based on the relationship between the sold power and the preset minimum charging power.

[0059] Specifically, in order to make full use of the electricity from the grid and avoid waste, and at the same time quickly respond to charging needs and improve charging efficiency, it is necessary to start the charging state of the charging pile based on the relationship between the selling power and the preset minimum charging power. For example, the acquired selling power is compared with the preset minimum charging power. If the selling power is greater than the threshold, the charging pile directly starts the charging procedure with the current selling power.

[0060] Step S103, dynamically adjusting the charging power of the charging pile based on the external photovoltaic power generation power and the load power of the area to which the charging pile belongs.

[0061] Exemplarily, the area to which the charging pile belongs can be within the load range of the family. Taking the load range of the family as an example, when the charging pile starts the charging state, the charging power of the charging pile can be gradually increased, the inverter continues to collect photovoltaic power, and the control unit simultaneously monitors the household load power (calculated through the household meter data). After each power increase, it is determined whether the current photovoltaic power can meet the sum of the household load power and the car charging power. If it is satisfied, that is, the photovoltaic power still has a surplus to support the increase of the charging power after deducting the household load power, then continue to increase the charging power of the charging pile according to the step size, otherwise, reduce the charging power of the charging pile.

[0062] The charging pile load management method provided in this embodiment obtains the electricity selling power when the charging pile is started; starts the charging state of the charging pile based on the relationship between the electricity selling power and the preset minimum charging power; and dynamically adjusts the charging power of the charging pile based on the external photovoltaic power generation power and the load power of the area to which the charging pile belongs. It can maximize the use of photovoltaic power generation power to charge the charging pile, solving the problem that the charging pile cannot dynamically adjust the charging power according to the photovoltaic power during charging and the photovoltaic power is insufficiently utilized.

[0063] In this embodiment, a charging pile load management method is provided, which can be used for a dynamic load management system, including: an AC charging pile, an adaptive inverter, a household meter and a control unit, wherein the AC charging pile is connected to the inverter, the household meter and the control unit respectively, and the AC charging pile is used as a core execution component for charging an electric vehicle; the inverter is connected to a photovoltaic panel for collecting photovoltaic power generation and realizing data communication with the charging pile; the household meter monitors the power consumption of the area (such as a home) to which the charging pile belongs in real time, and the data is fed back to the control unit; the control unit adjusts the charging power of the charging pile according to the data fed back by each component. Figure 2 is a flow chart of a charging pile load management method according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0064] Step S201, obtain the power sold when the charging pile is started. Figure 1 Step S101 of the illustrated embodiment will not be described in detail here.

[0065] Step S202, starting the charging state of the charging pile based on the relationship between the sold power and the preset minimum charging power.

[0066] Specifically, the above step S202 includes:

[0067] Step a: When the electricity selling power is greater than the preset minimum charging power, the charging state of the charging pile is started with the electricity selling power. The minimum charging power is set in the following way:

[0068] The ratio of the minimum charging power of the three-phase charging pile to the minimum charging power of the single-phase charging pile is set as the minimum charging power. For example: minimum charging power = minimum charging power of the three-phase charging pile 4.2KW / minimum charging power of the single-phase charging pile 1.4KW.

[0069] Step S203: dynamically adjust the charging power of the charging pile based on the external photovoltaic power generation and the load power of the area where the charging pile belongs. Figure 1 Step S103 of the illustrated embodiment will not be described in detail here.

[0070] The charging pile load management method provided in this embodiment starts the charging state of the charging pile with the sold electricity power when the sold electricity power is greater than the preset minimum charging power, making full use of the online electricity to avoid waste, and also being able to quickly respond to charging needs and improve charging efficiency.

[0071] In this embodiment, a charging pile load management method is provided, which can be used for a dynamic load management system, including: an AC charging pile, an adaptive inverter, a household meter and a control unit, wherein the AC charging pile is connected to the inverter, the household meter and the control unit respectively, and the AC charging pile is used as a core execution component for charging an electric vehicle; the inverter is connected to a photovoltaic panel for collecting photovoltaic power generation and realizing data communication with the charging pile; the household meter monitors the power consumption of the area (such as a home) to which the charging pile belongs in real time, and the data is fed back to the control unit; the control unit adjusts the charging power of the charging pile according to the data fed back by each component. Figure 3 is a flow chart of a charging pile load management method according to an embodiment of the present invention. Figure 3 As shown, the process includes the following steps:

[0072] Step S301, obtain the power sold when the charging pile is started. Figure 2 Step S201 of the illustrated embodiment will not be described in detail here.

[0073] Step S302: start the charging state of the charging pile based on the relationship between the selling power and the preset minimum charging power. Figure 2 Step S202 of the illustrated embodiment will not be described in detail here.

[0074] Step S303: dynamically adjust the charging power of the charging pile based on the external photovoltaic power generation power and the load power of the area to which the charging pile belongs.

[0075] Specifically, the above step S303 includes:

[0076] Step S3031, when the charging pile starts the charging state, the charging power of the charging pile is increased with a first preset incremental step size.

[0077] Specifically, the first preset incremental step length is set according to the rated power of the charging pile. In this embodiment, the first preset incremental step length is set to 5% of the rated power.

[0078] After the charging pile starts charging, the charging power is gradually increased in an incremental manner. The first preset incremental step of each power increase is set to 5% of the rated power. Each time the charging power is increased, the dynamic load management system is briefly delayed (e.g., 10 seconds) to stabilize the charging power output of the charging pile and facilitate the inverter to collect data.

[0079] Step S3032, after each power increase, calculate the sum of the load power of the area to which the charging pile belongs and the charging power of the charging pile, increase the charging power of the charging pile or reduce the charging power of the charging pile based on the size relationship between the external photovoltaic power generation power and the sum of the power, and use the power purchased from the power grid equal to the preset threshold as the balance point for not buying electricity from the power grid. Specifically, the preset threshold in this embodiment is set to 0. The area to which the charging pile belongs is taken as the home range as an example.

[0080] In some optional implementations, the above step S3032 includes:

[0081] Step a1: when the external photovoltaic power generation power is greater than or equal to the sum of the powers, continue to increase the charging power of the charging pile according to the first preset incremental step size.

[0082] Specifically, the inverter continuously collects photovoltaic power generation, and the control unit simultaneously monitors the household load power (calculated through household electricity meter data). After each charging pile charging power increase, it is determined whether the current photovoltaic power generation can meet the sum of the household load power and the vehicle charging power. If it is satisfied, that is, after deducting the household load power from the photovoltaic power, there is still a surplus to support the increase in charging power, then the charging power of the charging pile will continue to increase according to the first preset incremental step.

[0083] Step a2: when the external photovoltaic power generation power is less than the sum of the powers, the charging power of the charging pile is reduced until the purchased power is equal to the preset threshold.

[0084] Specifically, if it is determined that the photovoltaic power generation power is less than the sum of the powers, and electricity is about to be purchased from the power grid (that is, the purchased power has an upward trend), the charging power increase of the charging pile will be stopped immediately, and the charging power will be gradually reduced until the purchased power drops to 0, so as to find the balance point of maintaining no purchase of electricity from the power grid.

[0085] Step S3033, when the external photovoltaic power generation power is less than the load power of the area to which the charging pile belongs, the charging power of the charging pile is reduced until it is maintained at the minimum safe charging power for charging, and an alarm prompting the current photovoltaic power supply is insufficient is issued.

[0086] Specifically, when there are continuous cloudy days or sudden failures in the photovoltaic system, causing the photovoltaic power generation to be at an extremely low level for a long time, it may be necessary to buy a small amount of electricity from the grid even if the charging pile power has been reduced to the minimum. At this time, the dynamic load management system will issue an alarm to remind the user that the current photovoltaic power supply is insufficient, and at the same time maintain the charging power of the charging pile at the minimum safe charging power to avoid excessive consumption of grid resources, ensure the basic electricity needs of the family, and wait for the photovoltaic power to recover or the user to manually intervene to adjust the charging plan.

[0087] Step S3034, during the charging power reduction process of the charging pile, if the load power of the area to which the charging pile belongs is lower than the preset power threshold, the charging power reduction process of the charging pile is suspended and the charging power of the charging pile is increased with a second preset incremental step size to maintain a balance point without buying electricity from the power grid.

[0088] Specifically, the preset power threshold is set according to the actual situation, and no specific limitation is made here. The second preset incremental step is set according to the rated power of the charging pile. In this embodiment, the second preset incremental step is set to 3% to 5% of the rated power.

[0089] During the power reduction process, if the household load power suddenly drops significantly (such as some high-power electrical appliances are turned off), the state that was originally close to buying electricity will be reversed instantly, and excess electric energy will be fed back to the power grid. After the dynamic load management system detects this change, it will suspend the power reduction and try to gradually increase the charging power with a smaller second preset incremental step (such as 3% to 5% of the rated power), re-test the new power balance range, make full use of the excess electric energy, and improve energy utilization efficiency.

[0090] This embodiment provides a charging pile load management method. When the external photovoltaic power generation power is less than the load power of the area to which the charging pile belongs, the charging power of the charging pile is reduced until it is maintained at the minimum safe charging power for charging, and an alarm prompt of insufficient current photovoltaic power supply is issued to avoid excessive consumption of grid resources, ensure the basic electricity demand of the area to which the charging pile belongs, and wait for the photovoltaic power to recover or the user to manually intervene to adjust the charging plan. During the charging power reduction process of the charging pile, if the load power of the area to which the charging pile belongs is lower than the preset power threshold, the charging power reduction process of the charging pile is suspended and the charging power of the charging pile is increased by a second preset incremental step, thereby achieving a balance point of not buying electricity from the power grid, making full use of excess electricity, and improving energy efficiency.

[0091] Step S304, set the household current value of the area to which the charging pile belongs and the rated current value of the household circuit breaker of the charging pile; when the household current value is equal to or higher than the preset percentage of the rated current value of the household circuit breaker, reduce the charging power of the charging pile until the household current value is lower than the preset percentage of the rated current value of the household circuit breaker.

[0092] Specifically, the preset percentage is limited according to actual conditions and is not specifically limited here. The preset percentage in this embodiment is set to 90%.

[0093] The household electricity meter monitors the household current value in real time and transmits the data to the control unit. The user sets the rated current value of the household circuit breaker in advance in the charging pile control system (i.e. the charging pile control system of the electric vehicle). The control unit continuously compares the household current value with 90% of the rated current value of the household circuit breaker. When it is detected that the household current reaches the threshold, the power reduction command is immediately triggered to gradually reduce the charging power of the charging pile until the household current stabilizes below 90% of the rated current value of the household circuit breaker, effectively preventing the household circuit breaker from tripping due to excessive charging power of the charging pile, and ensuring the safety of household electricity use.

[0094] The charging pile load management method provided in this embodiment can monitor the load of the power system in the area where the charging pile belongs in real time and dynamically adjust the charging power of the charging pile according to the real-time data of photovoltaic power generation to avoid overload and tripping, while improving charging efficiency. The charging pile can give priority to photovoltaic power when the photovoltaic power generation power is sufficient, and intelligently switch to energy storage or grid power when the photovoltaic power is insufficient to ensure that the charging needs of electric vehicles are met. When the household current value is equal to or higher than the preset percentage of the household circuit breaker rated current value, the electric power of the charging pile is reduced until the household current value is lower than the preset percentage of the household circuit breaker rated current value, effectively preventing the household circuit breaker from tripping due to excessive charging power, and ensuring the safety of electricity use in the area where the charging pile belongs.

[0095] As one or more specific application embodiments of the embodiments of the present invention, the charging pile load management method provided by the present invention is further described in detail, specifically including:

[0096] The charging pile load management method provided by the present invention is applied to a dynamic load management system, comprising: an AC charging pile, an adapted inverter, a household electric meter and a control unit, wherein the AC charging pile is respectively connected to the inverter, the household electric meter and the control unit, and the AC charging pile is used as a core execution component for charging an electric vehicle; the inverter is connected to a photovoltaic panel for collecting photovoltaic power generation and realizing data communication with the charging pile; the household electric meter monitors the power consumption of the area (such as a home) to which the charging pile belongs in real time, and the data is fed back to the control unit; the control unit regulates the charging power of the charging pile according to the data fed back by each component.

[0097] (I) Start-up control strategy:

[0098] 1. When the charging pile is started, it first obtains the current electricity selling power (i.e. the electricity sold to the grid) through the communication link with the inverter and the household electricity meter.

[0099] 2. The system presets the minimum charging power value and compares the obtained selling power with the minimum charging power (the minimum charging power of a three-phase charging pile is 4.2KW / the minimum charging power of a single-phase charging pile is 1.4KW). If the selling power is greater than the threshold, the charging pile will directly start the charging process with the current selling power, making full use of the power on the grid to avoid waste, while also being able to quickly respond to charging needs and improve charging efficiency.

[0100] (II) Dynamic adjustment of charging power during charging process:

[0101] 1. After the charging pile is started, the charging power is gradually increased in an incremental manner. The step size of each power increase is set to 5% of the rated power. Each time the power is increased, the system is briefly delayed (e.g., 10 seconds) to stabilize the power output and collect data.

[0102] 2. The inverter continuously collects photovoltaic power, and the control unit simultaneously monitors the household load power (calculated through household electricity meter data). After each power increase, determine whether the current photovoltaic power can meet the sum of the household load power and the car charging power. If it is satisfied, that is, the photovoltaic power still has a surplus to support the increase in charging power after deducting the household load power, then continue to increase the charging power in steps; if it is determined that electricity is about to be purchased from the power grid (that is, the purchased power has an upward trend), then immediately stop the power increase and gradually reduce the charging power until the purchased power drops to 0, and find a balance point to maintain not buying electricity from the power grid.

[0103] (III) Dealing with sudden changes in photovoltaic power:

[0104] 1. When there are continuous cloudy days or sudden failures in the photovoltaic system, causing the photovoltaic power to be at an extremely low level for a long time, it may be necessary to buy a small amount of electricity from the grid even if the charging pile power has been reduced to the minimum. At this time, the system will issue an alarm to remind the user that the current photovoltaic power supply is insufficient, and at the same time maintain the charging pile power at the minimum safe charging power to avoid excessive consumption of grid resources, ensure the basic electricity needs of the family, and wait for the photovoltaic power to recover or the user to manually intervene to adjust the charging plan.

[0105] 2. During the power reduction process, if the household load power suddenly drops significantly (such as some high-power electrical appliances are turned off), the state that was originally close to buying electricity will be reversed instantly, and excess electric energy will be fed back to the power grid. After the system detects this change, it will suspend power reduction and try to gradually increase the charging power with smaller incremental steps (such as 3%-5% of the rated power), re-test the new power balance range, make full use of excess electric energy, and improve energy utilization efficiency.

[0106] (IV) Protection mechanism based on household current:

[0107] 1. The household electric meter monitors the household current value in real time and transmits the data to the control unit. The user sets the rated current value of the household circuit breaker in the charging pile control system in advance.

[0108] 2. The control unit continuously compares the incoming current value with 90% of the rated current value of the incoming circuit breaker. When it is detected that the incoming current reaches this threshold, the power reduction command is immediately triggered to gradually reduce the charging power of the charging pile until the incoming current stabilizes below 90% of the rated current value, effectively preventing the circuit breaker from tripping due to excessive charging power and ensuring the safety of household electricity use.

[0109] The charging pile load management method provided in this embodiment can maximize the use of photovoltaic power generation to charge electric vehicles by dynamically adjusting the output power of the charging pile, especially when the photovoltaic power fluctuates greatly, it can achieve dynamic power adjustment, and overcome the problem of insufficient photovoltaic power utilization in the prior art. By making full use of photovoltaic power generation, the dependence on traditional fossil energy is reduced, which helps to reduce environmental pollution and carbon emissions and promote the realization of environmental protection goals. Compared with traditional power systems, distributed photovoltaic systems can significantly reduce the emission of carbon dioxide and other harmful gases, while reducing dependence on external power supply and ensuring energy security and stability. By reducing dependence on the power grid and load, the operating efficiency and reliability of the overall power grid can be improved, the pressure on the power system can be reduced, and households can partially or fully achieve energy self-sufficiency and reduce dependence on the power grid, thereby reducing the pressure on the power system and improving the operating efficiency and reliability of the overall power grid.

[0110] The charging pile load management method provided in this embodiment not only improves the efficiency and reliability of household photovoltaic AC charging piles, but also helps to promote the green transformation of household energy use and achieve the goals of energy conservation, emission reduction and sustainable development.

[0111] In this embodiment, a charging pile load management device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and will not be repeated here. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0112] This embodiment provides a charging pile load management device, such as Figure 4 As shown, including:

[0113] The power selling acquisition module 401 is used to acquire the power selling when the charging pile is started.

[0114] The charging state starting module 402 is used to start the charging state of the charging pile based on the relationship between the selling power and the preset minimum charging power.

[0115] The charging power dynamic adjustment module 403 is used to dynamically adjust the charging power of the charging pile based on the external photovoltaic power generation power and the load power of the area to which the charging pile belongs.

[0116] In some optional implementations, the charging state starting module 402 includes:

[0117] The charging state starting unit is used to start the charging state of the charging pile with the selling power when the selling power is greater than the preset minimum charging power. The minimum charging power is set in the following way:

[0118] The ratio of the minimum charging power of the three-phase charging pile to the minimum charging power of the single-phase charging pile is set as the minimum charging power.

[0119] In some optional implementations, the charging power dynamic adjustment module 403 includes:

[0120] The charging power increasing unit is used to increase the charging power of the charging pile with a first preset increasing step size after the charging pile starts the charging state.

[0121] The first charging power dynamic adjustment unit is used to calculate the sum of the load power of the area to which the charging pile belongs and the charging power of the charging pile after each power increase, increase the charging power of the charging pile or reduce the charging power of the charging pile based on the relationship between the external photovoltaic power generation power and the sum of the powers, and use the power purchased from the power grid equal to a preset threshold as a balance point for not purchasing electricity from the power grid.

[0122] The second charging power dynamic adjustment unit is used to reduce the charging power of the charging pile until it is maintained at the minimum safe charging power for charging when the external photovoltaic power generation power is less than the load power of the area to which the charging pile belongs, and to issue an alarm prompting that the current photovoltaic power supply is insufficient.

[0123] The third charging power dynamic adjustment unit is used to suspend the charging power reduction process of the charging pile and increase the charging power of the charging pile with a second preset incremental step size during the charging power reduction process of the charging pile, if the load power of the area to which the charging pile belongs is lower than the preset power threshold, so as to maintain a balance point without buying electricity from the power grid.

[0124] In some optional implementations, the charging power dynamic adjustment unit includes:

[0125] The charging power increasing subunit is used to continue to increase the charging power of the charging pile according to a first preset increasing step when the external photovoltaic power generation power is greater than or equal to the sum of the powers.

[0126] The charging power reduction subunit is used to reduce the charging power of the charging pile when the external photovoltaic power generation power is less than the sum of the powers until the purchased power is equal to a preset threshold.

[0127] In an optional implementation, the charging pile load management device further includes:

[0128] The current value setting module is used to set the household current value of the area to which the charging pile belongs and the rated current value of the household circuit breaker of the charging pile.

[0129] The incoming current protection module is used to reduce the charging power of the charging pile when the incoming current value is equal to or higher than a preset percentage of the rated current value of the incoming circuit breaker, until the incoming current value is lower than a preset percentage of the rated current value of the incoming circuit breaker.

[0130] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0131] The charging pile load management device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0132] The embodiment of the present invention also provides a computer device having the above Figure 4 The charging pile load management device shown.

[0133] See also Figure 5 , Figure 5 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 5 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 5 A processor 10 is taken as an example.

[0134] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0135] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0136] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0137] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0138] The computer device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Figure 5 The example of connecting through bus is taken in the following.

[0139] The input device 30 can receive input digital or character information, and generate key signal input related to the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0140] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0141] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0142] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A charging pile load management method, characterized in that: The method comprises: Get the power sold when the charging pile is started; Starting the charging state of the charging pile based on the relationship between the selling power and the preset minimum charging power; The charging power of the charging pile is dynamically adjusted based on the external photovoltaic power generation power and the load power of the area where the charging pile belongs.

2. The method according to claim 1, characterized in that: The charging state of the charging pile is started based on the relationship between the selling power and the preset minimum charging power, including: When the electricity selling power is greater than the preset minimum charging power, the charging state of the charging pile is started with the electricity selling power.

3. The method according to claim 1 or 2, characterized in that: The minimum charging power is set in the following manner: the ratio of the minimum charging power of the three-phase charging pile to the minimum charging power of the single-phase charging pile is set as the minimum charging power.

4. The method according to claim 1, characterized in that: The method of dynamically adjusting the charging power of the charging pile based on the external photovoltaic power generation and the load power of the area to which the charging pile belongs includes: When the charging pile starts the charging state, the charging power of the charging pile is increased with a first preset incremental step size; After each power increase, the sum of the load power of the area to which the charging pile belongs and the charging power of the charging pile is calculated, and the charging power of the charging pile is increased or reduced based on the relationship between the external photovoltaic power generation power and the sum of the powers. The power purchased from the power grid equals to the preset threshold as the balance point for not buying electricity from the power grid.

5. The method according to claim 4, characterized in that The increasing or reducing the charging power of the charging pile based on the magnitude relationship between the external photovoltaic power generation power and the sum of the power includes: When the external photovoltaic power generation power is greater than or equal to the sum of the powers, continue to increase the charging power of the charging pile according to a first preset incremental step size; When the external photovoltaic power generation power is less than the sum of the powers, the charging power of the charging pile is reduced until the purchased power is equal to a preset threshold.

6. The method according to claim 4, characterized in that The method of dynamically adjusting the charging power of the charging pile based on the external photovoltaic power generation power and the load power of the area to which the charging pile belongs also includes: When the external photovoltaic power generation power is less than the load power of the area to which the charging pile belongs, the charging power of the charging pile is reduced until it is maintained at the minimum safe charging power for charging, and an alarm prompting the current photovoltaic power supply is insufficient is issued; During the decreasing process of the charging power of the charging pile, if the load power of the area to which the charging pile belongs is lower than a preset power threshold, the decreasing process of the charging power of the charging pile is suspended and the charging power of the charging pile is increased with a second preset incremental step size to maintain a balance point without buying electricity from the power grid.

7. The method according to claim 1, characterized in that The method further comprises: Set the household current value of the area where the charging pile belongs and the rated current value of the household circuit breaker of the charging pile; When the incoming current value is equal to or higher than a preset percentage of the rated current value of the incoming circuit breaker, the charging power of the charging pile is reduced until the incoming current value is lower than a preset percentage of the rated current value of the incoming circuit breaker.

8. A charging pile load management device, characterized in that: The device comprises: The power selling module is used to obtain the power selling when the charging pile is started; A charging state starting module, used to start the charging state of the charging pile based on the relationship between the selling power and the preset minimum charging power; The charging power dynamic adjustment module is used to dynamically adjust the charging power of the charging pile based on the external photovoltaic power generation power and the load power of the area to which the charging pile belongs.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the charging pile load management method according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the charging pile load management method according to any one of claims 1 to 7.

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