Ordered charging control system and method based on network communication

Abstract

The invention discloses an ordered charging control system and method based on network communication, and belongs to the technical field of ordered charging control. The method comprises the steps of obtaining charging pile operation data in a station, power utilization data in the station and station output power threshold data, and calculating total controllable power P, direct current charging pile controllable power M and alternating current charging pile controllable power N; the operation data of the charging pile in the station comprises the current output power P1 of the charging pile and the output power P2 of the charging pile; when the current output power P1 of the charging pile is larger than the output power P2 of the charging pile, the power is limited; when the current output power P1 of the charging pile is smaller than or equal to the output power P2 of the charging pile, the power is released; and based on the size relation between the total controllable power P and the sum of the direct current charging pile controllable power M and the alternating current charging pile controllable power N, respectively determining the output power of each charging pile under different working conditions when the power is released and the power is limited.

Description

Technical Field

[0001] The present invention belongs to the technical field of orderly charging control, and relates to an orderly charging control system and method based on network communication. Background Art

[0002] With the increasing global awareness of environmental protection and the transformation of energy structure, the new energy vehicle industry has ushered in an unprecedented period of rapid development. Electric vehicles, with their advantages of zero emissions, low noise, and high energy efficiency, have gradually become an important part of urban transportation. However, the large-scale popularization of electric vehicles has also brought about an increasing demand for charging, which has put forward higher requirements for the construction of charging infrastructure. Charging piles, as key facilities for electric vehicle energy replenishment, their number and distribution directly affect the charging convenience and user experience of electric vehicle users. In order to meet the growing demand for charging, the construction speed of charging piles is accelerating, especially in areas with intensive charging demand such as residential communities, industrial parks, enterprises and institutions, the deployment of charging piles is in full swing. However, in these application scenarios, if a dedicated distribution transformer is newly built for each charging station, not only will the power utilization rate be low, but the investment cost will also be significantly increased, which will bring a greater economic burden to operators and users. Therefore, a more economical and efficient approach is to share the same distribution transformer for the charging load and the original power load.

[0003] However, this approach also brings new challenges. Due to the superposition of charging demand power and the original power load power, the total power can easily exceed the rated capacity of the distribution transformer, causing power safety hazards such as overload and overheating. Especially in new energy charging stations, there are usually multiple DC charging piles and AC charging piles. These devices have high charging power and fast charging speed, and the impact on the distribution system is more significant. Therefore, how to meet the charging needs of electric vehicles without increasing the capacity of the distribution transformer and affecting the normal power demand of the original power load has become a problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problem in the prior art that when the charging load and the original power load share the same distribution transformer, the total power is likely to exceed the rated capacity of the distribution transformer, thereby causing potential safety hazards of electricity use such as overload and overheating, and to provide an orderly charging control system and method based on network communication.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention discloses an orderly charging control system based on network communication, including an AC meter on the transformer side and an AC charging pile and a DC charging pile in a new energy charging station; the AC meter on the transformer side, the AC charging pile and the DC charging pile are all communicatively connected to an orderly charging controller; the AC meter on the transformer side is connected to the orderly charging controller via RS485 communication; the orderly charging controller is connected to the AC charging pile and the DC charging pile via TCP / IP communication; the orderly charging controller is communicatively connected to a cloud platform and a device management platform.

[0006] Further improvements are: The orderly charging controller is connected to a cloud platform and a device management platform via TCP / IP communication.

[0007] In a second aspect, the present invention discloses an orderly charging control method based on network communication based on the above system, comprising: Obtain the charging pile operation data, power consumption data and output power threshold data in the station, and calculate the total controllable power P, DC charging pile controllable power M and AC charging pile controllable power N; The charging pile operation data in the station includes the current output power P1 of the charging pile and the output power P2 of the charging pile; when the current output power P1 of the charging pile>the output power P2 of the charging pile, the power is limited; when the current output power P1 of the charging pile≤the output power P2 of the charging pile, the power is released; Based on the relationship between the total controllable power P and the sum of the controllable power M of the DC charging pile and the controllable power N of the AC charging pile, the output power of each charging pile in different working conditions when the power is released and the power is limited is determined respectively.

[0008] Further improvements are: When releasing the power, when the total controllable power P≤DC charging pile controllable power M+AC charging pile controllable power N, the total released power of the DC charging pile is dc_cp=P*M / (M+N), and the total released power of the AC charging pile is ac_cp=P*N / (M+N); when the total controllable power P>DC charging pile controllable power M+AC charging pile controllable power N, the total released power of the DC charging pile is dc_cp=M, and the total released power of the AC charging pile is ac_cp=N, and the output power of each charging pile is set to the rated power.

[0009] The power distribution of the DC charging pile is specifically as follows: Distribute the total release power dc_cp of the DC charging pile to each gun in turn according to the ratio of (gun rated power - gun output power) / (total rated power - total output power); the power value that should be released for each pile is calculated as dc_pPipe=SUM(dc_pGuns).

[0010] The power distribution of the AC charging pile is specifically as follows: The total available power ac_cp of the AC charging pile is distributed to each gun in turn according to the ratio of (gun rated power - gun output power) / (total rated power - total output power).

[0011] When limiting power, when the total controllable power P ≤ controllable power of DC charging pile M + controllable power of AC charging pile N, the total limitable power of DC charging pile is dc_cp = P*M / (M+N), and the total limitable power of AC charging pile is ac_cp = P*N / (M+N); when the total controllable power P > controllable power of DC charging pile M + controllable power of AC charging pile N, the total limitable power of DC charging pile is dc_cp = M, and the total limitable power of AC charging pile is ac_cp = N, and the remaining limit power is re_p = (P–M–N), and the online charging power of each charging pile is set to the offline power.

[0012] The power distribution of the DC charging pile is specifically as follows: Distribute the total limitable power dc_cp of the DC charging pile to each gun in turn according to the ratio of (gun output power - gun offline power) / (total output power - total offline power); and calculate the limitable power value of each charging pile as dc_pPipe=SUM(dc_pGuns).

[0013] The power distribution of the AC charging pile is specifically as follows: The total limitable power ac_cp of the AC charging pile is distributed to each pile in turn according to the ratio of (gun output power - gun offline power) / (total output power - total offline power).

[0014] When the remaining limited power re_p>0, the remaining limited power re_p is distributed to each AC charging pile in turn until the remaining limited power re_p is completely distributed.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses an orderly charging control system based on network communication. By establishing a local area network with the AC charging piles and DC charging piles in the station through the orderly charging controller, and adopting the TCP / IP communication protocol, the real-time and efficient collection of key information such as the output power of the charging piles is realized, and the accuracy and timeliness of the data are ensured. The orderly charging controller is connected to the three-phase AC meter installed on the transformer side through RS485 communication, and follows the Modbus protocol. It can collect the power consumption data in the station in real time and accurately, and provide the system with comprehensive power consumption information, which is helpful to optimize energy distribution and management. The system allows users to set the output power threshold value in the station according to actual needs. This function enhances the flexibility and adaptability of the system, making the charging process more in line with the safe operation requirements of the power grid and the needs of users. The orderly charging controller uses the collected data to perform real-time analysis through advanced algorithms, calculates the reasonable output power of each charging pile, realizes intelligent control of the charging process, and improves charging efficiency and energy utilization. Based on the calculation results, the orderly charging controller sends specific output power instructions to the AC charging piles and DC charging piles in the station. Each charging pile can respond quickly and adjust its own output power, ensuring the stability and safety of the charging process.

[0016] The present invention discloses an orderly charging control method based on network communication. The method can accurately calculate the total controllable power and the controllable power of each DC and AC charging pile by acquiring the operation data, power consumption data and output power threshold data of the charging pile in the station in real time. On this basis, the output power of each charging pile is dynamically adjusted, which effectively avoids the transformer overload problem caused by improper power output of the charging pile, and ensures the safe and stable operation of the power grid. The method flexibly adopts the strategy of limiting or releasing power according to the comparison between the current output power of the charging pile and the output power. When the current output power of the charging pile exceeds its output power, its power output is timely limited to avoid overload; otherwise, the power is released to meet the charging demand. This intelligent adjustment method not only ensures the safe operation of the charging pile, but also improves the charging efficiency and reduces the waiting time of users. By comprehensively considering the relationship between the total controllable power and the sum of the controllable power of the DC and AC charging piles, the method can accurately determine the working state of each charging pile when releasing power and limiting power, thereby realizing the optimal allocation of energy. This not only improves energy utilization, but also reduces energy waste, which is in line with the green and low-carbon development concept. This method allows the output power threshold to be flexibly set according to the actual situation of the site and the needs of the power grid, thereby enhancing the flexibility and adaptability of the system. This enables the system to better cope with different charging needs and power grid conditions, and provide more reliable and efficient charging services. This method can achieve precise control and management of charging loads through intelligent scheduling and optimization algorithms, thereby meeting the charging needs of electric vehicle users while ensuring the safe and stable operation of the power grid. The emergence of this technology not only helps to solve the current problems faced in the promotion and application of charging facilities, but also provides strong support for the sustainable development of the new energy vehicle industry.

[0017] Furthermore, the method can accurately calculate and allocate the total available or limited power of DC and AC charging piles according to the actual controllable power, ensuring that the output power of each charging pile meets the charging demand without exceeding the capacity of the power grid and equipment. When releasing the power, the method gives priority to meeting the rated power demand of the charging pile; when limiting the power, the output power of the charging pile is intelligently adjusted according to the current output power and offline power of the charging pile to optimize energy distribution and reduce energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1It is a flow chart of an orderly charging control method based on network communication in the present invention; Figure 2 A detailed step diagram of an orderly charging control method based on network communication in the present invention; Figure 3 It is a communication flow chart of the orderly charging controller and the AC and DC charging piles in the present invention; Figure 4 This is a flow chart for collecting electricity usage in a station in the present invention; Figure 5 It is a schematic diagram of an orderly charging control system based on network communication in the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 3 , Figure 4 and Figure 5 The embodiment of the present invention discloses an orderly charging control system based on network communication, including an AC meter on the transformer side and an AC charging pile and a DC charging pile in a new energy charging station; the AC meter on the transformer side, the AC charging pile and the DC charging pile are all communicatively connected to an orderly charging controller; the AC meter on the transformer side is connected to the orderly charging controller via RS485 communication; the orderly charging controller is connected to the AC charging pile and the DC charging pile via TCP / IP communication, the orderly charging controller serves as a TCP server, and the charging pile serves as a TCP client; the orderly charging controller is connected to a cloud platform and a device management platform via TCP / IP communication.

[0024] TCP client operation: 1. Connect to the server.

[0025] 4. Receive the power setting data sent by the server and adjust its own output power.

[0026] TCP server side operation: 3. Parse, update and store the client status frame data.

[0027] 4. Set the power delivery.

[0028] The present invention discloses an orderly charging control system based on network communication. By establishing a local area network with the AC charging piles and DC charging piles in the station through the orderly charging controller, and adopting the TCP / IP communication protocol, the real-time and efficient collection of key information such as the output power of the charging piles is realized, and the accuracy and timeliness of the data are ensured. The orderly charging controller is connected to the three-phase AC meter installed on the transformer side through RS485 communication, and follows the Modbus protocol. It can collect the power consumption data in the station in real time and accurately, and provide the system with comprehensive power consumption information, which is helpful to optimize energy distribution and management. The system allows users to set the output power threshold value in the station according to actual needs. This function enhances the flexibility and adaptability of the system, making the charging process more in line with the safe operation requirements of the power grid and the needs of users. The orderly charging controller uses the collected data to perform real-time analysis through advanced algorithms, calculates the reasonable output power of each charging pile, realizes intelligent control of the charging process, and improves charging efficiency and energy utilization. Based on the calculation results, the orderly charging controller sends specific output power instructions to the AC charging piles and DC charging piles in the station. Each charging pile can respond quickly and adjust its own output power, ensuring the stability and safety of the charging process.

[0029] See also Figure 1 and Figure 2 The present invention also discloses an orderly charging control method based on network communication, which is characterized by comprising: Step 1: Obtain the charging pile operation data, power consumption data and output power threshold data of the station, and calculate the total controllable power P, the DC charging pile controllable power M and the AC charging pile controllable power N; Step 2: The charging pile operation data in the station includes the current output power P1 of the charging pile and the output power P2 of the charging pile; when the current output power P1 of the charging pile is greater than the output power P2 of the charging pile, the power is limited; when the current output power P1 of the charging pile is less than or equal to the output power P2 of the charging pile, the power is released; Step three, based on the relationship between the total controllable power P and the sum of the controllable power M of the DC charging pile and the controllable power N of the AC charging pile, respectively determine the output power of each charging pile under different working conditions when the power is released and the power is limited.

[0030] Specifically: When releasing the power, when the total controllable power P≤DC charging pile controllable power M+AC charging pile controllable power N, the total releaseable power of the DC charging pile is dc_cp=P*M / (M+N), and the total releaseable power of the AC charging pile is ac_cp=P*N / (M+N); when the total controllable power P>DC charging pile controllable power M+AC charging pile controllable power N, the total releaseable power of the DC charging pile is dc_cp=M, and the total releaseable power of the AC charging pile is ac_cp=N, and the output power of each charging pile is set to the rated power. The power distribution of the DC charging pile is specifically as follows: Distribute the total release power dc_cp of the DC charging pile to each gun in turn according to the ratio of (gun rated power - gun output power) / (total rated power - total output power); the power value that should be released for each pile is calculated as dc_pPipe=SUM(dc_pGuns).

[0031] The power distribution of the AC charging pile is specifically as follows: The total available power ac_cp of the AC charging pile is distributed to each gun in turn according to the ratio of (gun rated power - gun output power) / (total rated power - total output power).

[0032] When limiting power, when the total controllable power P ≤ controllable power of DC charging pile M + controllable power of AC charging pile N, the total limitable power of DC charging pile is dc_cp = P*M / (M+N), and the total limitable power of AC charging pile is ac_cp = P*N / (M+N); when the total controllable power P > controllable power of DC charging pile M + controllable power of AC charging pile N, the total limitable power of DC charging pile is dc_cp = M, and the total limitable power of AC charging pile is ac_cp = N, and the remaining limit power is re_p = (P–M–N), and the online charging power of each charging pile is set to the offline power.

[0033] The power distribution of the DC charging pile is specifically as follows: Allocate dc_cp to each gun in turn according to the ratio of (gun output power - gun offline power) / (total output power - total offline power); calculate the power limit value of each pile as dc_pPipe=SUM(dc_pGuns).

[0034] The power distribution of the AC charging pile is specifically as follows: Allocate ac_cp to each pile in turn according to the ratio of (gun output power - gun offline power) / (total output power - total offline power).

[0035] When the remaining limited power re_p>0, the remaining limited power re_p is distributed to each AC charging pile in turn until the remaining limited power re_p is completely distributed.

[0036] The present invention discloses an orderly charging control method based on network communication. The method can accurately calculate the total controllable power and the controllable power of each DC and AC charging pile by acquiring the operation data, power consumption data and output power threshold data of the charging pile in the station in real time. On this basis, the output power of each charging pile is dynamically adjusted, which effectively avoids the transformer overload problem caused by improper power output of the charging pile, and ensures the safe and stable operation of the power grid. The method flexibly adopts the strategy of limiting or releasing power according to the comparison between the current output power of the charging pile and the output power. When the current output power of the charging pile exceeds its output power, its power output is timely limited to avoid overload; otherwise, the power is released to meet the charging demand. This intelligent adjustment method not only ensures the safe operation of the charging pile, but also improves the charging efficiency and reduces the waiting time of users. By comprehensively considering the relationship between the total controllable power and the sum of the controllable power of the DC and AC charging piles, the method can accurately determine the working state of each charging pile when releasing power and limiting power, thereby realizing the optimal allocation of energy. This not only improves energy utilization, but also reduces energy waste, which is in line with the green and low-carbon development concept. This method allows the output power threshold to be flexibly set according to the actual situation of the site and the needs of the power grid, thereby enhancing the flexibility and adaptability of the system. This enables the system to better cope with different charging needs and power grid conditions, and provide more reliable and efficient charging services. This method can achieve precise control and management of charging loads through intelligent scheduling and optimization algorithms, thereby meeting the charging needs of electric vehicle users while ensuring the safe and stable operation of the power grid. The emergence of this technology not only helps to solve the current problems faced in the promotion and application of charging facilities, but also provides strong support for the sustainable development of the new energy vehicle industry.

[0037] The working process of the present invention is as follows: (1) System networking: Connect the charging piles and orderly charging controller equipment in the station by wire, and connect the meter communication cable to the orderly charging controller.

[0038] (2) IP parameter configuration: Set the IP addresses of the AC and DC charging piles and orderly charging controllers in the station, and set the IP address of the orderly charging controller server on each charging pile to ensure that the charging pile and the orderly charging controller can communicate through TCP / IP.

[0039] (3) Station parameter configuration: Set the station output power threshold value on the orderly charging controller.

[0040] (4) System operation: After the parameter configuration is completed, the system operates normally and can dynamically adjust the output power of the charging piles in the station to prevent the transformer from overloading.

[0041] The present invention only implements the load constraint control strategy. The orderly charging controller strategy control module of the core control device can be expanded according to different application scenarios, such as the scalable three-phase balance strategy, priority charging constraint strategy, peak shaving and valley filling strategy, etc.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An orderly charging control system based on network communication, characterized in that: It includes an AC meter on the transformer side and an AC charging pile and a DC charging pile in a new energy charging station; the AC meter on the transformer side, the AC charging pile and the DC charging pile are all communicatively connected to an orderly charging controller; the AC meter on the transformer side is connected to the orderly charging controller via RS485 communication; the orderly charging controller is connected to the AC charging pile and the DC charging pile via TCP / IP communication; the orderly charging controller is communicatively connected to a cloud platform and a device management platform.

2. The orderly charging control system based on network communication according to claim 1 is characterized in that: The orderly charging controller is connected to a cloud platform and a device management platform via TCP / IP communication.

3. An orderly charging control method based on network communication based on the system of claim 1, characterized in that: include: Obtain the charging pile operation data, power consumption data and output power threshold data in the station, and calculate the total controllable power P, DC charging pile controllable power M and AC charging pile controllable power N; The charging pile operation data in the station includes the current output power P1 of the charging pile and the output power P2 of the charging pile; when the current output power P1 of the charging pile>the output power P2 of the charging pile, the power is limited; when the current output power P1 of the charging pile≤the output power P2 of the charging pile, the power is released; Based on the relationship between the total controllable power P and the sum of the controllable power M of the DC charging pile and the controllable power N of the AC charging pile, the output power of each charging pile in different working conditions when the power is released and the power is limited is determined respectively.

4. The orderly charging control method based on network communication according to claim 3 is characterized in that: When releasing the power, when the total controllable power P≤DC charging pile controllable power M+AC charging pile controllable power N, the total released power of the DC charging pile is dc_cp=P*M / (M+N), and the total released power of the AC charging pile is ac_cp=P*N / (M+N); when the total controllable power P>DC charging pile controllable power M+AC charging pile controllable power N, the total released power of the DC charging pile is dc_cp=M, and the total released power of the AC charging pile is ac_cp=N, and the output power of each charging pile is set to the rated power.

5. The orderly charging control method based on network communication according to claim 4 is characterized in that: The power distribution of the DC charging pile is specifically as follows: Distribute the total release power dc_cp of the DC charging pile to each gun in turn according to the ratio of (gun rated power - gun output power) / (total rated power - total output power); the power value that should be released for each pile is calculated as dc_pPipe=SUM(dc_pGuns).

6. The orderly charging control method based on network communication according to claim 4 is characterized in that: The power distribution of the AC charging pile is specifically as follows: The total available power ac_cp of the AC charging pile is distributed to each gun in turn according to the ratio of (gun rated power - gun output power) / (total rated power - total output power).

7. The orderly charging control method based on network communication according to claim 3 is characterized in that: When limiting power, when the total controllable power P ≤ controllable power of DC charging pile M + controllable power of AC charging pile N, the total limitable power of DC charging pile is dc_cp = P*M / (M+N), and the total limitable power of AC charging pile is ac_cp = P*N / (M+N); when the total controllable power P > controllable power of DC charging pile M + controllable power of AC charging pile N, the total limitable power of DC charging pile is dc_cp = M, and the total limitable power of AC charging pile is ac_cp = N, and the remaining limit power is re_p = (P–M–N), and the online charging power of each charging pile is set to the offline power.

8. The orderly charging control method based on network communication according to claim 7, characterized in that: The power distribution of the DC charging pile is specifically as follows: Distribute the total limitable power dc_cp of the DC charging pile to each gun in turn according to the ratio of (gun output power - gun offline power) / (total output power - total offline power); and calculate the limitable power value of each charging pile as dc_pPipe=SUM(dc_pGuns).

9. The orderly charging control method based on network communication according to claim 7, characterized in that: The power distribution of the AC charging pile is specifically as follows: The total limitable power ac_cp of the AC charging pile is distributed to each pile in turn according to the ratio of (gun output power - gun offline power) / (total output power - total offline power).

10. The orderly charging control method based on network communication according to claim 7, characterized in that: When the remaining limited power re_p>0, the remaining limited power re_p is distributed to each AC charging pile in turn until the remaining limited power re_p is completely distributed.

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