A charging station power supply load balancing method

Abstract

The present invention discloses a method for balancing the power supply load of a charging station, which relates to the technical field of power supply load balancing, including obtaining the maximum power of a charging station, dividing the maximum power of the charging station, and outputting a charging speed interval; obtaining the real-time power of the charging station and the maximum power station power, calculating and analyzing the real-time power of the charging station, and outputting specific balance information; calculating and analyzing the real-time power of the charging station and the charging speed interval, and adjusting the output power of the charging station based on the calculation result; the present invention is used to solve the problem that in the prior art, the charging station cannot be analyzed based on a model obtained by accurate simulation, and when the charging station reaches the maximum output power and performs power supply load balancing, it cannot be recharged immediately, thereby affecting the charging efficiency of the user.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply load balancing, and in particular to a power supply load balancing method for a charging station. Background Art

[0002] An electric vehicle charging station is similar to a gas station for cars. It is a "power-up" device, a high-efficiency charger, and a device that can charge electric bicycles, electric cars, and elderly scooters. Among them, it can be divided into fast charging stations and slow charging stations according to the charging speed. "Electric vehicle fast charging stations", commonly known as fast charging, can be set up in street shops, street communities, newsstands, parking sheds, lottery betting points, etc., just like gas stations for cars. Power supply load balancing is an important feature of charging stations, which can prevent damage to the stability of the power grid or overload; it is achieved by managing the power distribution of charging stations when more electric vehicles are charging at the same time; through power supply load balancing, available energy can be distributed to the charging network in real time, providing the highest potential charging power without affecting the power grid and power supply.

[0003] Existing improvements for power supply load balancing usually predict the power that a charging station may need in the future so that the charging station can continue to meet the charging requirements. For example, in a Chinese patent with publication number CN114444759A, a load degree calculation model and a balance management method based on urban bus charging stations are disclosed. This solution is to obtain a load degree calculation model for urban bus depot charging stations through calculation and simulation, and to respond to the continuous adjustment of the bus network based on the model to achieve the effect of continuously meeting the charging needs of buses. However, existing methods cannot analyze the charging station based on the model obtained by accurate simulation. When the charging station reaches the maximum output power and performs power supply load balancing, it cannot immediately support the charging of new electric vehicles, and the charging efficiency is low. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the prior art to a certain extent. By improving the power supply load balancing, it is used to solve the problem that the prior art cannot analyze the charging station based on a model obtained by accurate simulation, and when the charging station reaches the maximum output power and performs power supply load balancing, it cannot immediately resume charging, thereby affecting the user's charging efficiency.

[0005] To achieve the above object, the present invention provides a charging station power supply load balancing method, comprising:

[0006] Obtain the maximum output power of the charging piles in the charging station, analyze the maximum output power, divide the maximum output power based on the analysis results, and output the charging speed range;

[0007] Obtain the real-time electric pile power and the maximum power station power, calculate and analyze the real-time electric pile power based on the maximum power station power, and output the required balancing information based on the calculation and analysis results; analyze the real-time electric pile power based on the required balancing information, and output specific balancing information based on the analysis results;

[0008] Based on the specific balance information, the real-time charging pile power and charging speed range are calculated and analyzed, and the output power of the charging pile is adjusted based on the calculation results.

[0009] Furthermore, the charging speed interval includes a slow charging interval, a fast charging interval and a flash charging interval; the maximum charging pile power in the charging station is obtained, the maximum charging pile power is analyzed, the maximum charging pile power is divided based on the analysis result, and the charging speed interval is output:

[0010] Obtain the maximum output power of the charging pile, marked as the maximum electric pile power; compare the maximum electric pile power with the power threshold; obtain the first power, the second power and the third power of the charging pile, the first power is less than the second power, and the second power is less than the third power;

[0011] When the maximum charging pile power is less than or equal to the power threshold, the closed interval from the first power to the second power is marked as a slow charging interval, and the closed interval from the third power to the maximum charging pile power is marked as a fast charging interval; the slow charging interval and the fast charging interval are output;

[0012] When the maximum charging pile power is greater than the power threshold, the closed interval from the first power to the second power is marked as a slow charging interval, and the closed interval from the third power to the power threshold is marked as a fast charging interval; the left open and right closed interval from the power threshold to the maximum charging pile power is marked as a flash charging interval; the slow charging interval, fast charging interval and flash charging interval are output.

[0013] Furthermore, the charging station is equipped with a power grid monitoring unit; the charging pile has a unique device number;

[0014] The power grid monitoring unit can output startup information when the charging pile starts to output power, and the startup information includes the startup time and the device number; and output release information when the charging pile stops outputting power, and the release information includes the device number; the power grid monitoring unit can also monitor and output the real-time power of the charging pile.

[0015] Furthermore, the charging station is also configured with a power grid database, which is used to receive startup information and release information; when the startup information is received, the startup time is stored based on the device number; when the release information is received, the startup time is deleted based on the device number.

[0016] Furthermore, the real-time electric pile power and the maximum power station power are obtained, and the real-time electric pile power is calculated and analyzed based on the maximum power station power. The information that needs to be balanced is output based on the calculation and analysis results, including:

[0017] Get the real-time charging pile power of each charging pile; calculate the sum of all real-time charging pile powers and mark it as balance judgment power;

[0018] Get the maximum output power of the charging station, marked as the maximum power station power; compare the balance judgment power with the maximum power station power. When the balance judgment power is equal to the maximum power station power, output the balance information required; when the balance judgment power is less than the maximum power station power, output the balance information not required.

[0019] Furthermore, the specific balance information includes first balance information and second balance information. The real-time electric pile power is analyzed based on the required balance information, and the specific balance information is output based on the analysis result, including:

[0020] When receiving the information requiring balancing, determining whether there is an output power of 0, and when there is no output power of 0, outputting the first balancing information;

[0021] When there is an output power of 0, the second balance information is output.

[0022] Furthermore, the real-time charging pile power and charging speed range are calculated and analyzed based on the specific balance information, and the output power of the charging pile is adjusted based on the calculation result, including:

[0023] When the first balance information is received, determining the charging speed interval in which each real-time electric pile power is located;

[0024] When the real-time charging power of the electric pile is in the slow charging range, the start time corresponding to the real-time charging power is set and does not participate in the subsequent steps; when the real-time charging power of the electric pile is not in the slow charging range, no processing is performed;

[0025] Get the current time, calculate the difference between the current time and the start time of each charging pile, and mark it as the charging time;

[0026] Obtain the number of charging piles, and mark the number of charging piles at the first scaling factor as the balanced number;

[0027] Sort the charging durations in ascending order to obtain a duration sequence;

[0028] The charging duration of the rightmost balanced quantity in the duration sequence is marked as balanced duration, and the charging pile corresponding to the balanced duration is marked as balanced pile; the real-time charging pile power of the balanced pile is marked as balanced power;

[0029] The output power of the balancing pile is adjusted to the left end point of the charging speed interval where the balancing power is located; the difference between the balancing power and the left end point of the charging speed interval is calculated and marked as the first balancing power;

[0030] The sum of all first balanced powers is calculated and marked as second balanced power.

[0031] Furthermore, calculating and analyzing the real-time charging pile power and charging speed range based on the specific balance information, and adjusting the output power of the charging pile based on the calculation result also includes:

[0032] Set a sliding window with a window size of 1, set the sliding window to the leftmost side of the duration sequence, mark the charging pile corresponding to the charging duration in the sliding window as the priority pile; mark the real-time charging pile power corresponding to the charging duration in the sliding window as the priority power; mark the right end point of the charging speed interval where the priority power is located as the adjustment power;

[0033] A power balancing cycle is set, the power balancing cycle comprising:

[0034] Calculate the difference between the adjusted power and the priority power, and mark it as the first difference; subtract the first difference from the second balanced power, and when the second balanced power is still greater than 0, balance the output power of the priority pile to the adjusted power; move the sliding window to the right by a window size, and repeat the power balancing cycle; when the second balanced power minus the first difference is less than or equal to 0, add the second balanced power to the output power of the priority pile and stop the power balancing cycle.

[0035] Furthermore, calculating and analyzing the real-time charging pile power and charging speed range based on the specific balance information, and adjusting the output power of the charging pile based on the calculation result also includes:

[0036] When the second balance information is received, determining the charging speed interval in which each real-time electric pile power is located;

[0037] When the real-time charging power of the electric pile is in the slow charging range, the start time corresponding to the real-time charging power is set and does not participate in the subsequent steps; when the real-time charging power of the electric pile is not in the slow charging range, no processing is performed;

[0038] Get the current time, calculate the difference between the current time and the start time of each charging pile, and mark it as the charging time;

[0039] Obtain the number of charging piles, and mark the number of charging piles at the first scaling factor as the balanced number;

[0040] Sort the charging durations in ascending order to obtain a duration sequence;

[0041] The charging duration of the rightmost balanced quantity in the duration sequence is marked as balanced duration, and the charging pile corresponding to the balanced duration is marked as balanced pile; the real-time charging pile power of the balanced pile is marked as balanced power;

[0042] The output power of the balancing pile is adjusted to the left end point of the charging speed interval where the balancing power is located; the difference between the balancing power and the left end point of the charging speed interval is calculated and marked as the third balancing power;

[0043] The sum of all third balanced powers is calculated and then the right endpoint of the slow charging interval is subtracted, which is marked as the fourth balanced power.

[0044] Furthermore, calculating and analyzing the real-time charging pile power and charging speed range based on the specific balance information, and adjusting the output power of the charging pile based on the calculation result also includes:

[0045] Set a sliding window with a window size of 1, set the sliding window to the leftmost side of the duration sequence, mark the charging pile corresponding to the charging duration in the sliding window as the priority pile; mark the real-time charging pile power corresponding to the charging duration in the sliding window as the priority power; mark the right end point of the charging speed interval where the priority power is located as the adjustment power;

[0046] A power balancing cycle is set, the power balancing cycle comprising:

[0047] Calculate the difference between the adjusted power and the priority power, and mark it as the second difference; subtract the second difference from the fourth balanced power, and when the fourth balanced power is still greater than 0, balance the output power of the priority pile to the adjusted power; move the sliding window to the right by a window size, and repeat the power balancing cycle; when the fourth balanced power subtracts the second difference and is less than or equal to 0, add the fourth balanced power to the output power of the priority pile and stop the power balancing cycle.

[0048] Beneficial effects of the present invention: The present invention obtains the maximum power of the electric pile, divides the maximum output power to obtain the charging speed interval, and when performing power supply load balancing based on the charging speed interval, the charging pile in the slow charging interval is set not to be processed, and then the output power of the balancing pile is adjusted to the left end point of the charging speed interval. The advantage of this is that there is very little power available for balancing in the slow charging interval, so the charging pile in the slow charging interval is not subjected to power supply load balancing processing, which can improve the efficiency of power supply load balancing in subsequent steps; by adjusting the output power of the balancing pile to the left end point of the corresponding charging speed interval, the output power that meets the user's needs at the minimum and the maximum power that can be used for balancing can be provided, thereby improving the efficiency and intelligence of power supply load balancing;

[0049] The present invention also determines whether balancing is required by analyzing the real-time power of the charging pile. When balancing is required, the balancing method is selected again to perform power supply load balancing. The advantage of this is that, through judgment, a situation where balancing is not required can be obtained, in which case no balancing is performed, thereby improving the intelligence of the balancing. When balancing is required, if there are idle charging piles in the charging station, a certain amount of additional power is reserved in the power supply load balancing so that a new user can immediately receive charging feedback when charging, thereby avoiding the situation where there is no response for a short time after the charging port is connected, thereby further improving the intelligence of the power supply load balancing.

[0050] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic diagram of the steps of a charging station power supply load balancing method according to the present invention;

[0052] Figure 2 This is a schematic diagram of a charging station of the present invention when there are idle charging piles;

[0053] Figure 3 This is a schematic diagram of a charging station of the present invention when there are no idle charging piles. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] Example 1

[0056] See also Figure 1 As shown, the present invention provides a charging station power supply load balancing method, comprising:

[0057] Step S1, obtaining the maximum output power of the charging pile in the charging station, analyzing the maximum output power, dividing the maximum output power based on the analysis result, and outputting the charging speed interval; Step S1 also includes the following sub-steps:

[0058] Step S101, obtaining the maximum output power of the charging pile, marked as the maximum charging pile power; comparing the maximum charging pile power with the power threshold.

[0059] The first power, second power and third power of the charging pile are obtained. The first power is less than the second power, and the second power is less than the third power. It should be noted that the maximum output power of the charging pile is determined by the charging pile manufacturer; the power threshold is set to 80KW, the first power is set to 3KW, the second power is set to 10KW, and the third power is set to 30KW.

[0060] When the first power is set too small, the charging efficiency is too low. Considering the charging efficiency, it is optimal to set the first power to 3KW.

[0061] When the output power is less than or equal to 10KW, the charging pile outputs AC current, and the AC current is converted into DC through a DC-AC converter in the vehicle to charge the battery. Due to limited space on the vehicle, only a small-power DC-AC converter can be integrated. For different types of electric bicycles, when the output AC current is greater than 10KW, for example 15KW, it may exceed the power limit of the DC-AC converter for AC-DC conversion. Therefore, the second power is most preferably set to 10KW.

[0062] When the output power is greater than 10KW, the charging pile outputs DC current. Similarly, for the first power, when the output DC current power is less than 30KW, the charging efficiency is low and does not meet the fast charging requirements. Therefore, the range between 10KW and 30KW is not analyzed.

[0063] The setting of the power threshold is based on the output power of existing and common charging piles. With the development of fast charging technology, the output power of existing charging piles can reach 360KW or even higher. When the output power is greater than 80KW, it can meet the flash charging needs.

[0064] Step S102, when the maximum charging pile power is less than or equal to the power threshold, mark the closed interval from the first power to the second power as a slow charging interval, and mark the closed interval from the third power to the maximum charging pile power as a fast charging interval; output the slow charging interval and the fast charging interval.

[0065] Step S103, when the maximum charging pile power is greater than the power threshold, mark the closed interval from the first power to the second power as a slow charging interval, and mark the closed interval from the third power to the power threshold as a fast charging interval; mark the left open and right closed interval from the power threshold to the maximum charging pile power as a flash charging interval; output the slow charging interval, fast charging interval and flash charging interval.

[0066] The charging station is equipped with a power grid monitoring unit; the charging pile has a unique device number; the power grid monitoring unit can output startup information when the charging pile starts to output power, and the startup information includes the startup time and the device number; when the charging pile stops outputting power, it outputs release information, and the release information includes the device number; the power grid monitoring unit can also monitor and output the real-time power of the charging pile.

[0067] The charging station is also equipped with a power grid database, which is used to receive startup information and release information; when the startup information is received, the startup time is stored based on the device number; when the release information is received, the startup time is deleted based on the device number.

[0068] See also Figure 2 as well as Figure 3 As shown, Figure 2 T1 is the charging pile being used, and T2 is the charging pile not being used. Figure 3 T1 is the charging pile being used; T1 is the dark rectangular area in the figure, and T2 is the light rectangular area in the figure; the rectangular area corresponding to the charging pile includes the parking space.

[0069] Step S2, obtaining the real-time electric pile power and the maximum power station power, calculating and analyzing the real-time electric pile power based on the maximum power station power, and outputting the information requiring balancing or not requiring balancing based on the calculation and analysis results; when receiving the information requiring balancing, analyzing the real-time electric pile power, and outputting the specific balancing information based on the analysis results; Step S2 also includes the following sub-steps:

[0070] Step S2011, obtain the real-time charging pile power of each charging pile; calculate the sum of all real-time charging pile powers and mark it as balance judgment power.

[0071] Step S2012, obtain the maximum output power of the charging station, marked as the maximum power station power; compare the balance judgment power with the maximum power station power, when the balance judgment power is equal to the maximum power station power, output the information that balance is required; when the balance judgment power is less than the maximum power station power, output the information that balance is not required.

[0072] It should be noted that the maximum output power of the charging station is determined by the input power of the power grid. For example, if there are 30 charging piles in the charging station and the maximum output power of each charging pile is 120KW, the theoretical maximum power of the power station is 30×120=3600KW. In actual applications, if the charging station is set in the distribution network and there are important loads in the distribution network, it is necessary to constrain the capacity of the charging station connected to the distribution network. For example, the input power of the power grid is set to 2000KW. At this time, the maximum output power of the charging station is 2000KW.

[0073] When the balancing judgment power is less than the maximum power station power, one situation is that there is still surplus power in the charging station to support the charging of a new car; when the new car starts charging, the power supply load balancing is performed; the other situation is that all charging piles are used and the output power used is less than the maximum power station power; in both cases, there is no need to balance the power supply load of the charging station, so the output does not require balancing information.

[0074] When the balance judgment power is equal to the maximum power station power, one case is that all charging piles are used, and the other case is that there are charging piles that are not used, so further analysis is required, that is, step S202.

[0075] by Figure 2 For example:

[0076] In the first case, if there are 30 charging piles in the charging station, the input power of the charging station is 2000KW, and 20 charging piles are in use, if the average output power of each charging pile is 100KW, then the balance judgment power is equal to the maximum output power of 2000KW, and there is a charging pile with an output power of 0, then the second balance information is output in the subsequent step.

[0077] In the second case, if there are 30 charging piles in the charging station, the input power of the charging station is 2000KW, and 20 charging piles are in use, if the average output power of each charging pile is 80KW, then the balance judgment power is 1600KW, which is less than the maximum output power, and direct output does not require balance information.

[0078] by Figure 3 For example:

[0079] In the first case, if there are 30 charging piles in the charging station, the input power of the charging station is 3000KW, and the average output power of each charging pile is 100KW. At this time, the maximum power station power is equal to the balance judgment power, and there is no charging pile with an output of 0. The first balance information is output in the subsequent step.

[0080] In the second case, if there are 30 charging piles in the charging station, the input power of the charging station is 3000KW, and the average output power of each charging pile is 80KW. At this time, the balance judgment power is 2400KW, and direct output does not require balance information.

[0081] Step S202, when receiving the information requiring balancing, determining whether there is an output power of 0, and when there is no output power of 0, outputting the first balancing information; when there is an output power of 0, outputting the second balancing information.

[0082] Step S3, calculating and analyzing the real-time charging pile power and charging speed range based on the specific balance information, and adjusting the output power of the charging pile based on the calculation results; Step S3 also includes the following sub-steps:

[0083] Step S3011, when the first balance information is received, determine the charging speed interval in which each real-time electric pile power is located.

[0084] Step S3012, when the real-time charging pile power is in the slow charging interval, the start time corresponding to the real-time charging pile power is set not to participate in subsequent steps; when the real-time charging pile power is not in the slow charging interval, no processing is performed.

[0085] It should be noted that when the real-time charging pile power is within the slow charging range, the output power of the charging pile is less than or equal to 10KW, and the efficiency of power supply load balancing for the charging pile is extremely low, so it is set not to participate in subsequent steps.

[0086] Step S3013, obtain the current time, calculate the difference between the current time and the start time of each charging pile, and mark it as the charging time.

[0087] Step S3014, obtaining the number of charging piles, and marking the number of charging piles at the first zoom factor as a balanced number.

[0088] In specific implementation, the first scaling factor is set to 0.2. For example, when there are 30 charging piles in the charging station, the balancing number is 6, indicating that 6 charging piles need to be powered load balanced. The first scaling factor can be arbitrarily set within the closed interval of 0.1 to 0.5, and should not be less than 0.1. When it is less than 0.1, the output power obtained by balancing may be low, resulting in no significant balancing effect. If necessary, the first scaling factor can be greater than 0.5, but should not be too large.

[0089] Step S3015, sorting the charging durations in ascending order to obtain a duration sequence.

[0090] Step S3016, mark the charging duration of the rightmost balanced number in the duration sequence as balanced duration, mark the charging pile corresponding to the balanced duration as balanced pile; mark the real-time charging pile power of the balanced pile as balanced power.

[0091] Step S3017, adjusting the output power of the balancing pile to the left endpoint of the charging speed interval where the balancing power is located; calculating the difference between the balancing power and the left endpoint of the charging speed interval, and marking it as the first balancing power.

[0092] Step S3018: Calculate the sum of all first balanced powers and mark it as second balanced power.

[0093] Step S3021, set a sliding window with a window size of 1, set the sliding window to the leftmost side of the duration sequence, mark the charging pile corresponding to the charging duration in the sliding window as the priority pile; mark the real-time charging pile power corresponding to the charging duration in the sliding window as the priority power; mark the right endpoint of the charging speed interval where the priority power is located as the adjusted power.

[0094] Step S3022: Setting a power balancing cycle, the power balancing cycle includes:

[0095] Calculate the difference between the adjusted power and the priority power, and mark it as the first difference; subtract the first difference from the second balanced power, and when the second balanced power is still greater than 0, balance the output power of the priority pile to the adjusted power; move the sliding window to the right by a window size, and repeat the power balancing cycle; when the second balanced power minus the first difference is less than or equal to 0, add the second balanced power to the output power of the priority pile and stop the power balancing cycle.

[0096] Step S3031, when the second balance information is received, determine the charging speed interval in which each real-time electric pile power is located.

[0097] Step S3032, when the real-time charging pile power is in the slow charging interval, the start time corresponding to the real-time charging pile power is set not to participate in subsequent steps; when the real-time power is not in the slow charging interval, no processing is performed.

[0098] Step S3033, obtain the current time, calculate the difference between the current time and the start time of each charging pile, and mark it as the charging time.

[0099] Step S3034, obtaining the number of charging piles, and marking the number of charging piles at the first zoom factor as a balanced number.

[0100] Step S3035, sorting the charging durations in ascending order to obtain a duration sequence.

[0101] Step S3036, mark the charging duration of the rightmost balanced number in the duration sequence as balanced duration, mark the charging pile corresponding to the balanced duration as balanced pile; mark the real-time charging pile power of the balanced pile as balanced power.

[0102] Step S3037, adjusting the output power of the balancing pile to the left endpoint of the charging speed interval where the balancing power is located; calculating the difference between the balancing power and the left endpoint of the charging speed interval, and marking it as the third balancing power.

[0103] Step S3038: Calculate the sum of all third balanced powers and then subtract the right endpoint of the slow charging interval, which is marked as the fourth balanced power.

[0104] It should be noted that compared with step S3018, the purpose of subtracting the right endpoint of the slow charging interval from the sum of the third balanced power in step S3038 is to enable immediate output when a new electric bicycle is charged, and then balance the power supply load to avoid the situation where the electric bicycle cannot be charged within a short time after being connected to the charging port.

[0105] Step S3041, set a sliding window with a window size of 1, set the sliding window to the leftmost side of the duration sequence, mark the charging pile corresponding to the charging duration in the sliding window as the priority pile; mark the real-time charging pile power corresponding to the charging duration in the sliding window as the priority power; mark the right endpoint of the charging speed interval where the priority power is located as the adjusted power.

[0106] Step S3042: Setting a power balancing cycle, the power balancing cycle includes:

[0107] Calculate the difference between the adjusted power and the priority power, and mark it as the second difference; subtract the second difference from the fourth balanced power, and when the fourth balanced power is still greater than 0, balance the output power of the priority pile to the adjusted power; move the sliding window to the right by a window size, and repeat the power balancing cycle; when the fourth balanced power subtracts the second difference and is less than or equal to 0, add the fourth balanced power to the output power of the priority pile and stop the power balancing cycle.

[0108] Example 2

[0109] The difference between this embodiment and embodiment 1 is that, for the maximum power station power, when the charging station is set in the transmission network, the maximum power station power is the theoretical charging pile output power. When the maximum power station power is equal to the balance judgment power, the power supply load balancing cannot be performed. Therefore, this embodiment is further described for the case where the charging station is set in the transmission network:

[0110] Step S2, obtaining the real-time electric pile power and the maximum power station power, calculating and analyzing the real-time electric pile power based on the maximum power station power, and outputting the information requiring balancing or not requiring balancing based on the calculation and analysis results; when receiving the information requiring balancing, analyzing the real-time electric pile power, and outputting the specific balancing information based on the analysis results; Step S2 also includes the following sub-steps:

[0111] Step S2011, obtain the real-time charging pile power of each charging pile; calculate the sum of all real-time charging pile powers and mark it as balance judgment power.

[0112] Step S2012, obtaining the maximum output power of the charging station, marked as the maximum station power.

[0113] Step S2013, obtain the number of charging piles, and use the power calculation formula to calculate the theoretical maximum power.

[0114] The power calculation formula is configured as: LMX=ZS×ZD; where LMX is the theoretical maximum power, ZS is the number of charging piles, and ZD is the maximum charging pile power.

[0115] Step S2014, determine whether the theoretical maximum power is the same as the maximum power station power. When they are not the same, compare the balance judgment power and the maximum power station power. When the balance judgment power is equal to the maximum power station power, output the information that balance is required; when the balance judgment power is less than the maximum power station power, output the information that balance is not required.

[0116] When the same, the output does not require balance information.

[0117] Step S202, when receiving the information requiring balancing, determining whether there is an output power of 0, and when there is no output power of 0, outputting the first balancing information; when there is an output power of 0, outputting the second balancing information.

[0118] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0119] It should be understood by those skilled in the art that the embodiments of the present invention can be provided as methods, systems or computer program products. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program codes. Among them, the storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, disk or optical disk. These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0120] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

Claims

1. A charging station power supply load balancing method, characterized in that: include: Obtain the maximum power of the charging pile in the charging station, analyze the maximum power of the charging pile, divide the maximum power of the charging pile based on the analysis results, and output the charging speed range; Obtain the real-time charging pile power and the maximum power station power, calculate and analyze the real-time charging pile power based on the maximum power station power, and output the required balancing information based on the calculation and analysis results; Analyze the real-time charging pile power based on the required balancing information, and output specific balancing information based on the analysis results; Calculate and analyze the real-time charging pile power and charging speed range based on specific balance information, and adjust the output power of the charging pile based on the calculation results; The charging speed interval includes a slow charging interval, a fast charging interval and a flash charging interval; Get the maximum charging pile power in the charging station, analyze the maximum charging pile power, and divide the maximum charging pile power based on the analysis results. The output charging speed range includes: Obtain the maximum output power of the charging pile, marked as the maximum electric pile power; compare the maximum electric pile power with the power threshold; obtain the first power, the second power and the third power of the charging pile, the first power is less than the second power, and the second power is less than the third power; When the maximum charging pile power is less than or equal to the power threshold, the closed interval from the first power to the second power is marked as a slow charging interval, and the closed interval from the third power to the maximum charging pile power is marked as a fast charging interval; the slow charging interval and the fast charging interval are output; When the maximum charging pile power is greater than the power threshold, the closed interval from the first power to the second power is marked as a slow charging interval, and the closed interval from the third power to the power threshold is marked as a fast charging interval; the left open and right closed interval from the power threshold to the maximum charging pile power is marked as a flash charging interval; the slow charging interval, fast charging interval and flash charging interval are output; The charging station is equipped with a power grid monitoring unit; the charging pile has a unique device number; The power grid monitoring unit can output startup information when the charging pile starts to output power, and the startup information includes the startup time and the device number; when the charging pile stops outputting power, it can output release information, and the release information includes the device number; the power grid monitoring unit can also monitor and output the real-time power of the charging pile; The charging station is also configured with a power grid database, which is used to receive startup information and release information; when the startup information is received, the startup time is stored based on the device number; when the release information is received, the startup time is deleted based on the device number; Obtain the real-time charging pile power and the maximum power station power, calculate and analyze the real-time charging pile power based on the maximum power station power, and output the required balancing information based on the calculation and analysis results, including: Get the real-time charging pile power of each charging pile; calculate the sum of all real-time charging pile powers and mark it as balance judgment power; Get the maximum output power of the charging station, marked as the maximum power station power; compare the balance judgment power with the maximum power station power. When the balance judgment power is equal to the maximum power station power, output the balance information required; when the balance judgment power is less than the maximum power station power, output the balance information not required; The specific balance information includes first balance information and second balance information. The real-time electric pile power is analyzed based on the required balance information, and the specific balance information is output based on the analysis result, including: When receiving the information requiring balancing, determining whether there is an output power of 0, and when there is no output power of 0, outputting the first balancing information; When there is an output power of 0, outputting second balance information; Based on the specific balance information, the real-time charging pile power and charging speed range are calculated and analyzed, and the output power of the charging pile is adjusted based on the calculation results, including: When the first balance information is received, determining the charging speed interval in which each real-time electric pile power is located; When the real-time charging power of the electric pile is in the slow charging range, the start time corresponding to the real-time charging power is set and does not participate in the subsequent steps; when the real-time charging power of the electric pile is not in the slow charging range, no processing is performed; Get the current time, calculate the difference between the current time and the start time of each charging pile, and mark it as the charging time; Obtain the number of charging piles, and mark the number of charging piles at the first scaling factor as the balanced number; Sort the charging durations in ascending order to obtain a duration sequence; The charging duration of the rightmost balanced quantity in the duration sequence is marked as balanced duration, and the charging pile corresponding to the balanced duration is marked as balanced pile; the real-time charging pile power of the balanced pile is marked as balanced power; The output power of the balancing pile is adjusted to the left end point of the charging speed interval where the balancing power is located; the difference between the balancing power and the left end point of the charging speed interval is calculated and marked as the first balancing power; The sum of all first balanced powers is calculated and marked as second balanced power.

2. A charging station power supply load balancing method according to claim 1, characterized in that: Based on the specific balance information, the real-time charging pile power and charging speed range are calculated and analyzed, and the output power of the charging pile is adjusted based on the calculation results, which also includes: Set a sliding window with a window size of 1, set the sliding window to the leftmost side of the duration sequence, mark the charging pile corresponding to the charging duration in the sliding window as the priority pile; mark the real-time charging pile power corresponding to the charging duration in the sliding window as the priority power; mark the right end point of the charging speed interval where the priority power is located as the adjustment power; A power balancing cycle is set, the power balancing cycle comprising: Calculate the difference between the adjusted power and the priority power, and mark it as the first difference; subtract the first difference from the second balanced power, and when the second balanced power is still greater than 0, balance the output power of the priority pile to the adjusted power; move the sliding window to the right by a window size, and repeat the power balancing cycle; when the second balanced power minus the first difference is less than or equal to 0, add the second balanced power to the output power of the priority pile and stop the power balancing cycle.

3. A charging station power supply load balancing method according to claim 2, characterized in that: Based on the specific balance information, the real-time charging pile power and charging speed range are calculated and analyzed, and the output power of the charging pile is adjusted based on the calculation results, which also includes: When the second balance information is received, determining the charging speed interval in which each real-time electric pile power is located; When the real-time charging power of the electric pile is in the slow charging range, the start time corresponding to the real-time charging power is set and does not participate in the subsequent steps; when the real-time charging power of the electric pile is not in the slow charging range, no processing is performed; Get the current time, calculate the difference between the current time and the start time of each charging pile, and mark it as the charging time; Obtain the number of charging piles, and mark the number of charging piles at the first scaling factor as the balanced number; Sort the charging durations in ascending order to obtain a duration sequence; The charging duration of the rightmost balanced quantity in the duration sequence is marked as balanced duration, and the charging pile corresponding to the balanced duration is marked as balanced pile; the real-time charging pile power of the balanced pile is marked as balanced power; The output power of the balancing pile is adjusted to the left end point of the charging speed interval where the balancing power is located; the difference between the balancing power and the left end point of the charging speed interval is calculated and marked as the third balancing power; The sum of all third balanced powers is calculated and then the difference of the right endpoint of the slow charging interval is subtracted, which is marked as the fourth balanced power.

4. A charging station power supply load balancing method according to claim 3, characterized in that: Based on the specific balance information, the real-time charging pile power and charging speed range are calculated and analyzed, and the output power of the charging pile is adjusted based on the calculation results, which also includes: Set a sliding window with a window size of 1, set the sliding window to the leftmost side of the duration sequence, mark the charging pile corresponding to the charging duration in the sliding window as the priority pile; mark the real-time charging pile power corresponding to the charging duration in the sliding window as the priority power; mark the right end point of the charging speed interval where the priority power is located as the adjustment power; A power balancing cycle is set, the power balancing cycle comprising: Calculate the difference between the adjusted power and the priority power, and mark it as the second difference; subtract the second difference from the fourth balanced power, and when the fourth balanced power is still greater than 0, balance the output power of the priority pile to the adjusted power; move the sliding window to the right by a window size, and repeat the power balancing cycle; when the fourth balanced power subtracts the second difference and is less than or equal to 0, add the fourth balanced power to the output power of the priority pile and stop the power balancing cycle.

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