A charging pile power supply network topology identification method and system

Abstract

The present invention provides a method and system for identifying the topology of a charging pile power supply network, which relates to the field of power systems and new energy vehicle charging technology. The method includes first assigning a unique ID to the charging pile and encoding it in octal. Then the communication device sends a command to the charging pile and notifies the head end and branch detection device to prepare to measure the power change. After receiving the command, the charging pile first outputs a preset power change at a first preset time interval to form a guide code, and then controls the power change to an integer multiple of 1KW according to the octal code of the ID at a second preset time interval to transmit the ID information. The detection device monitors the circuit, starts the receiving function according to the time and power change standard, records and converts the power change, and restores the ID and determines the topological position of the charging pile after receiving the end code. The present invention effectively solves the problems of chaotic topology, unreasonable load distribution and three-phase imbalance in the power supply system, and improves charging efficiency and safety.

Description

Technical Field

[0001] The present invention relates to the field of power systems and new energy vehicle charging technology, and in particular to a method and system for identifying the topology of a charging pile power supply network. Background Art

[0002] With the increasing popularity of electric vehicles, the large-scale installation and deployment of AC charging stations has become an inevitable trend. However, in actual construction, due to the long time intervals between charging station installations, the power supply system has gradually become topologically chaotic. This chaos is mainly reflected in the difficulty in achieving reasonable load distribution, which in turn leads to serious three-phase imbalance in the distribution transformer.

[0003] In traditional power distribution networks, balanced load distribution is a key factor in ensuring power supply efficiency and safety. However, the unordered integration of charging stations has disrupted the existing balance of the distribution system. The usage frequency and power demand of charging stations vary significantly across time periods and regions, and there is a lack of effective coordination mechanisms. For example, during peak hours in certain commercial districts, a large number of electric vehicles charging simultaneously can cause one or more phases of the local distribution transformer to be overloaded, while other phases remain underloaded. This not only reduces transformer efficiency and increases power loss, but can also cause a series of power quality issues such as voltage fluctuations and harmonic pollution, seriously impacting the stable operation of the power system and the efficient and safe charging of charging equipment.

[0004] Furthermore, three-phase imbalance accelerates the aging of power equipment such as transformers and cables, shortening their service life and increasing maintenance costs and replacement frequency, placing a financial burden on power companies and users. Furthermore, the chaotic topology makes it difficult for power operators to accurately understand the power supply paths and load distribution of charging piles, creating significant challenges in troubleshooting, power dispatching, and system upgrades. This severely hinders the intelligent management and efficient operation of charging pile power supply networks. Therefore, an effective charging pile power supply network topology identification method and system are urgently needed to address these issues and ensure the stable, safe, and efficient operation of charging pile power supply networks. Summary of the Invention

[0005] To this end, an embodiment of the present invention provides a charging pile power supply network topology identification method and system for solving the problems in the prior art caused by large-scale decentralized installation of AC charging piles and long time intervals, such as chaotic power supply system topology, unreasonable load distribution, and three-phase imbalance of distribution transformers, which seriously affect efficient and safe charging.

[0006] In order to solve the above problems, an embodiment of the present invention provides a method for identifying a charging pile power supply network topology, the method comprising:

[0007] Assign a unique ID to each charging station and encode the ID into an octal digit string;

[0008] Use the communication device to send a start topology identification command to the charging pile, and notify the power supply network head end and each branch detection device to prepare to measure power changes;

[0009] After receiving the command, the charging pile implements a preset charging power change at a first preset time interval based on the correspondence between the charging power and the octal number, which serves as a guide code for the detection data;

[0010] After the boot code is transmitted, the charging pile controls the charging power to be output in increments of 1 kW at intervals of the second preset time, in accordance with the octal encoding sequence of its own ID, thereby realizing power coding transmission of the ID information.

[0011] The headend and each branch detection device monitor the loop power change in real time. When a power fluctuation with a first preset time or a second preset time as the time interval and a power change of an integer multiple of 1KW is detected, the topology identification data receiving function is started;

[0012] After confirming receipt of the pilot code, the headend and each branch detection device continuously record the subsequent power changes that meet the conditions, and record the power changes of 1KW integer multiples that change at the second preset time interval as octal numbers;

[0013] After the charging pile completes the power coding output of the ID information, it again outputs the preset charging power change at the first preset time interval as the end code of the detection data;

[0014] After confirming the receipt of the end code, the head-end and each branch detection device restores the recorded octal digital information to the original ID, and determines the phase difference between each branch and the head-end to which the charging pile is connected in the power supply network based on the corresponding phase difference information during the power change process, thereby realizing a complete topology identification function.

[0015] Preferably, the unique ID encoding method of the charging pile is octal encoding, and the encoding is reflected by the cyclic change of charging power during the topology identification process.

[0016] Preferably, after receiving the command, the charging pile implements a preset charging power change at a first preset time interval according to the correspondence between the charging power and the octal number, and the process of using the boot code of the detection data as follows:

[0017] After receiving the command, the charging pile implements the charging power change of 3KW-0KW-3KW-0KW at a time interval of 5s according to the octal digits 0-7 corresponding to the charging power 0-7KW, which serves as the guide code for the detection data.

[0018] Preferably, after the boot code transmission is completed, the charging pile outputs the charging power corresponding to the octal code of its own ID at intervals of 10s, and the power change is an integer multiple of 1KW.

[0019] Preferably, the triggering condition for the head-end and each branch detection device to start the topology identification data receiving function is to detect a power change with a time interval of 5s or 10s and a power change amount that is an integer multiple of 1KW.

[0020] Preferably, the head-end and each branch detection device records the power variation and converts it into an octal number based on the power variation at a time interval of 10s and an integer multiple of 1KW.

[0021] Preferably, after the charging pile completes the power coding output of the ID information, the process of changing the preset charging power again at a first preset time interval as the end code of the detection data is as follows:

[0022] After the charging pile completes the power coding output of the ID information, it again changes the charging power from 3KW to 0KW to 3KW to 0KW at an interval of 5 seconds as the end code of the detection data.

[0023] An embodiment of the present invention further provides a charging pile power supply network topology identification system, the system comprising:

[0024] Multiple charging piles, each charging pile has a unique ID and can perform charging power control according to the method of claim 1 to achieve topology identification;

[0025] A communication device, used to send a start topology identification command to the charging pile and communicate with the head-end and branch detection devices;

[0026] A head-end detection device for monitoring power changes at the head-end of the power supply network, and performing data recording and processing according to the method of claim 1 after receiving notification from the communication device;

[0027] A plurality of branch detection devices are distributed in various branches of the power supply network, and are used to monitor branch power changes, and perform data recording and processing according to the method of claim 1 after receiving notification from the communication device.

[0028] An embodiment of the present invention also provides an electronic device, which includes a processor, a memory and a bus system, wherein the processor and the memory are connected through the bus system, the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to implement the above-mentioned charging pile power supply network topology identification method.

[0029] An embodiment of the present invention further provides a computer storage medium storing a computer software product. The computer software product includes several instructions for enabling a computer device to execute the above-mentioned charging pile power supply network topology identification method.

[0030] It can be seen from the above technical solutions that the present invention has the following beneficial effects:

[0031] (1) Accurate topology identification: Assign a unique ID to each charging pile and encode it in octal. Accurately determine its position and connection relationship in the power supply network based on the specific power change mechanism, effectively solve the topology confusion problem, and provide accurate architecture information for management optimization.

[0032] (2) Optimize load balance: With the help of topology identification results, the power consumption of charging piles can be accurately grasped, the load can be reasonably distributed, the three-phase imbalance of distribution transformers can be significantly improved, the charging efficiency and safety can be improved, and the power consumption problems caused by unclear topology can be solved.

[0033] (3) Reliable data mechanism: The power change setting and detection device response mechanism at specific time intervals are used to build an efficient and reliable data transmission and identification system, reduce misjudgments and transmission errors, ensure accurate and stable topology identification, and enhance system adaptability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the implementation cases of the present invention or the technical solutions in the prior art, the following is a brief description of the drawings required for use in the embodiments. By referring to the drawings, the features and advantages of the present invention will be more clearly understood. The drawings are schematic and should not be understood as limiting the present invention in any way. Those skilled in the art can derive other drawings based on these drawings without inventive effort. Among them:

[0035] Figure 1 This is a flow chart of a method for identifying a charging pile power supply network topology provided in an embodiment;

[0036] Figure 2 This is a block diagram of a charging pile power supply network topology identification system provided in an embodiment. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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 making creative efforts shall fall within the scope of protection of the present invention.

[0038] Example 1

[0039] In order to solve the problems in the existing technology caused by large-scale decentralized installation of AC charging piles and long time intervals, such as chaotic power supply system topology, unreasonable load distribution, and three-phase imbalance of distribution transformers, which seriously affect efficient and safe charging. Figure 1 As shown, an embodiment of the present invention provides a method for identifying a charging pile power supply network topology, the method comprising:

[0040] Assign a unique ID to each charging station and encode the ID into an octal digit string;

[0041] Use the communication device to send a start topology identification command to the charging pile, and notify the power supply network head end and each branch detection device to prepare to measure power changes;

[0042] After receiving the command, the charging pile implements a preset charging power change at a first preset time interval based on the correspondence between the charging power and the octal number, which serves as a guide code for the detection data;

[0043] After the boot code is transmitted, the charging pile controls the charging power to be output in increments of 1 kW at intervals of the second preset time, in accordance with the octal encoding sequence of its own ID, thereby realizing power coding transmission of the ID information.

[0044] The headend and each branch detection device monitor the loop power change in real time. When a power fluctuation with a first preset time or a second preset time as the time interval and a power change of an integer multiple of 1KW is detected, the topology identification data receiving function is started;

[0045] After confirming receipt of the pilot code, the headend and each branch detection device continuously record the subsequent power changes that meet the conditions, and record the power changes of 1KW integer multiples that change at the second preset time interval as octal numbers;

[0046] After the charging pile completes the power coding output of the ID information, it again outputs the preset charging power change at the first preset time interval as the end code of the detection data;

[0047] After confirming the receipt of the end code, the head-end and each branch detection device restores the recorded octal digital information to the original ID, and determines the phase difference between each branch and the head-end to which the charging pile is connected in the power supply network based on the corresponding phase difference information during the power change process, thereby realizing a complete topology identification function.

[0048] From the above technical solution, it can be seen that the present invention proposes a charging pile power supply network topology identification method, which realizes the precise positioning of the charging pile through precise coding and power control mechanism, and successfully sorts out the chaotic topology structure; based on this, the load can be reasonably distributed, the three-phase imbalance of the distribution transformer can be effectively improved, and efficient and safe charging can be guaranteed; the rigorous monitoring and identification rules ensure the reliability of data transmission and enhance the stability and practicality of the system.

[0049] In this embodiment, a unique ID is assigned to each charging pile in the power supply network and converted into a digital string using octal encoding. This encoding method serves as a key information carrier in the subsequent power control and identification process to ensure the uniqueness and identifiability of each charging pile in the network. The encoding rules follow a specific algorithm to ensure the accuracy and uniqueness of the encoding and avoid encoding conflicts in a complex power supply network environment.

[0050] Specifically, the unique ID encoding method of the charging pile is octal code, and this code is reflected through high-precision charging power cycle changes during the topology identification process. The encoding process follows strict mathematical conversion rules to ensure the one-to-one correspondence between the code and the power change. At the same time, taking into account the capacity and performance differences of different charging piles, the response time and accuracy of the power change are optimized.

[0051] Furthermore, a communication device is used to send a start-topology identification command to the charging pile, and at the same time notify the head end of the power supply network and each branch detection device to prepare to measure power changes. The communication device adopts advanced communication protocols, such as communication technology based on 5G or industrial Ethernet, to ensure the high speed and reliability of command transmission, reduce transmission delay and bit error rate, and ensure the timeliness and accuracy of the topology identification process.

[0052] Furthermore, after receiving the command, the charging pile realizes the charging power change of 3KW-0KW-3KW-0KW at a time interval of 5s based on the correspondence between the charging power and the octal numbers (0KW, 1KW, 2KW, 3KW, 4KW, 5KW, 6KW, and 7KW correspond to 0, 1, 2, 3, 4, 5, 6, and 7 in octal, respectively), thereby forming a guide code for the detection data. The power change pattern and time interval of this guide code have been carefully designed to effectively trigger the response mechanism of the detection device under the background of complex power fluctuations, and will not be falsely triggered due to normal charging power cycle changes or small interference in the power grid.

[0053] Specifically, the guidance code is the charging power change of the charging pile from 3KW to 0KW to 3KW to 0KW at a time interval of 5s. The frequency and power change amplitude have been verified by a large number of experiments and theoretical analysis. It can effectively activate the specific monitoring functions of the head-end and branch detection devices in complex power grid environments and when multiple charging piles are running at the same time. It also has good anti-interference ability and will not malfunction due to the normal start and stop of other equipment or slight fluctuations in the power grid.

[0054] Furthermore, after the boot code transmission is completed, the charging pile controls the charging power to output in increments of 1KW at intervals of 10 seconds according to the octal coding sequence of its own ID, thereby realizing the power coding transmission of the ID information. In this process, the power control module of the charging pile adopts high-precision power regulation technology to ensure that the accuracy of the output power is within an extremely small error range, thereby ensuring the accuracy of the ID code transmission.

[0055] Specifically, after the boot code ends, the charging pile outputs the charging power change corresponding to the octal code of its own ID at intervals of 10 seconds, and the power change is an integer multiple of 1KW. During this process, the power control algorithm of the charging pile adopts closed-loop feedback control technology to monitor and adjust the output power in real time to ensure the stability and accuracy of the power change. At the same time, it works in coordination with the reactive compensation and voltage regulation equipment of the power grid to avoid adverse effects on the power quality of the power grid.

[0056] Furthermore, the head-end and each branch detection device monitors the loop power changes in real time. When a power fluctuation with a time interval of 5s or 10s and a power change of an integer multiple of 1KW is detected, the topology identification data reception function is quickly activated. These detection devices are equipped with highly sensitive power sensors and intelligent signal processing units, which can accurately capture weak power change signals in strong electromagnetic interference environments, and distinguish between valid signals and noise interference through advanced filtering and threshold judgment algorithms.

[0057] Specifically, the triggering condition for the head-end and branch detection devices to start the topology identification data reception function is to detect power changes with a time interval of 5s or 10s and a power change of an integer multiple of 1KW. The detection device uses high-speed data processing chips and intelligent algorithms inside, which can quickly analyze and judge a large amount of power data in real time, and accurately identify the power change signals that meet the triggering conditions in a very short time, ensuring the efficiency of the topology identification process.

[0058] Furthermore, after confirming receipt of the guide code, the head-end and each branch detection device continuously record the subsequent power changes that meet the conditions, and record the power changes of 1KW integer multiples that change at a time interval of 10s as octal numbers. Reliable data storage technology is used during the recording process to prevent data loss or erroneous writing, and a verification algorithm is used to ensure the integrity and accuracy of the data.

[0059] Specifically, the head-end and branch detection devices record power changes and convert them into octal numbers based on power changes at time intervals of 10s and integer multiples of 1KW. During the data recording and conversion process, redundant storage technology and error correction coding algorithms are used to prevent data errors caused by hardware failures or electromagnetic interference. At the same time, big data analysis technology is combined to analyze and optimize historical record data to continuously improve the accuracy and reliability of data processing.

[0060] Furthermore, after the charging pile completes the power coding output of the ID information, it again outputs the charging power change of 3KW-0KW-3KW-0KW at intervals of 5s as the end code. The purpose of this end code is to clearly mark the termination of a topology identification process, so that the detection device can stop data reception and processing in time, avoiding unnecessary errors or data confusion due to continuous monitoring.

[0061] Specifically, the end code is the charging power change of 3KW-0KW-3KW-0KW at a time interval of 5s after the charging pile finishes outputting the ID information. Its design purpose is to provide a clear end mark for the detection device. By accurately identifying the end code, the detection device can clear the cached data in time, turn off unnecessary monitoring functions, reduce system power consumption, and avoid erroneous judgments due to data residue or continuous monitoring.

[0062] Furthermore, after confirming receipt of the termination code, the headend and each branch detection device restores the recorded octal digital information to the original ID. Based on the corresponding phase information during the power change process, the phase difference between each branch and the headend to which the charging pile is connected in the power supply network is determined, thereby achieving complete topology identification. During the phase identification process, advanced phase detection algorithms and grid synchronization technology are used to ensure the accuracy of phase determination, which is unaffected by grid frequency fluctuations or phase distortion.

[0063] Example 2

[0064] like Figure 2 As shown, the present invention provides a charging pile power supply network topology identification system, which is used to implement the charging pile power supply network topology identification method of the above embodiment 1, specifically comprising:

[0065] Multiple charging piles, each with a unique ID and capable of charging power control according to the above method to achieve topology identification;

[0066] A communication device, used to send a start topology identification command to the charging pile and communicate with the head-end and branch detection devices;

[0067] A head-end detection device is used to monitor power changes at the head end of the power supply network and record and process data according to the above method after receiving notification from the communication device;

[0068] Multiple branch detection devices are distributed in various branches of the power supply network to monitor branch power changes and perform data recording and processing according to the above method after receiving notification from the communication device.

[0069] A charging pile power supply network topology identification system of this embodiment is used to implement the aforementioned charging pile power supply network topology identification method. Therefore, the specific implementation method of the charging pile power supply network topology identification system can be found in the embodiment part of the charging pile power supply network topology identification method mentioned above. In order to avoid redundancy, it will not be repeated here.

[0070] Example 3

[0071] An embodiment of the present invention provides an electronic device, which includes a processor, a memory and a bus system. The processor and the memory are connected through the bus system. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to implement the above-mentioned charging pile power supply network topology identification method.

[0072] Example 4

[0073] An embodiment of the present invention provides a computer storage medium storing a computer software product. The computer software product includes several instructions for enabling a computer device to execute the above-mentioned charging pile power supply network topology identification method.

[0074] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0075] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0076] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work 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 These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0077] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications derived therefrom remain within the scope of protection of the present invention.

Claims

1. A charging pile power supply network topology identification method, characterized in that: include: Assign a unique ID to each charging station and encode the ID into an octal digit string; Use the communication device to send a start topology identification command to the charging pile, and notify the power supply network head end and each branch detection device to prepare to measure power changes; After receiving the command, the charging pile implements a preset charging power change at a first preset time interval based on the correspondence between the charging power and the octal number, which serves as a guide code for the detection data; After the boot code is transmitted, the charging pile controls the charging power to be output in increments of 1 kW at intervals of the second preset time, in accordance with the octal encoding sequence of its own ID, thereby realizing power coding transmission of the ID information. The headend and each branch detection device monitor the loop power change in real time. When a power fluctuation with a first preset time or a second preset time as the time interval and a power change of an integer multiple of 1KW is detected, the topology identification data receiving function is started; After confirming receipt of the pilot code, the headend and each branch detection device continuously record the subsequent power changes that meet the conditions, and record the power changes of 1KW integer multiples that change at the second preset time interval as octal numbers; After the charging pile completes the power coding output of the ID information, it again outputs the preset charging power change at the first preset time interval as the end code of the detection data; After confirming the receipt of the end code, the head-end and each branch detection device restores the recorded octal digital information to the original ID, and determines the phase difference between each branch and the head-end to which the charging pile is connected in the power supply network based on the corresponding phase difference information during the power change process, thereby realizing a complete topology identification function.

2. The charging pile power supply network topology identification method according to claim 1, characterized in that: The unique ID encoding method of the charging pile is octal encoding, and the encoding is reflected by the cyclic change of charging power during the topology identification process.

3. The charging pile power supply network topology identification method according to claim 1, characterized in that: After receiving the command, the charging pile implements a preset charging power change at a first preset time interval according to the corresponding relationship between the charging power and the octal number, and the process of using the first preset time interval as the guide code for the detection data is as follows: After receiving the command, the charging pile implements the charging power change of 3KW-0KW-3KW-0KW at a time interval of 5s according to the octal digits 0-7 corresponding to the charging power 0-7KW, which serves as the guide code for the detection data.

4. The charging pile power supply network topology identification method according to claim 1, characterized in that: After the boot code transmission is completed, the charging pile outputs the charging power change corresponding to the octal code of its own ID at intervals of 10s, and the power change is an integer multiple of 1KW.

5. The charging pile power supply network topology identification method according to claim 1, characterized in that: The triggering condition for the head-end and each branch detection device to start the topology identification data receiving function is to detect a power change with a time interval of 5s or 10s and a power change amount that is an integer multiple of 1KW.

6. The charging pile power supply network topology identification method according to claim 1, characterized in that: The head-end and each branch detection device records the power variation and converts it into an octal number based on the power variation of 1KW with a time interval of 10s.

7. The charging pile power supply network topology identification method according to claim 1, characterized in that: After the charging pile completes the power coding output of the ID information, the process of changing the preset charging power again at the first preset time interval as the end code of the detection data is as follows: After the charging pile completes the power coding output of the ID information, it again changes the charging power from 3KW to 0KW to 3KW to 0KW at an interval of 5 seconds as the end code of the detection data.

8. A charging pile power supply network topology identification system, characterized in that: include: Multiple charging piles, each charging pile has a unique ID and can perform charging power control according to the method of claim 1 to achieve topology identification; A communication device, used to send a start topology identification command to the charging pile and communicate with the head-end and branch detection devices; A head-end detection device for monitoring power changes at the head-end of the power supply network, and performing data recording and processing according to the method of claim 1 after receiving notification from the communication device; A plurality of branch detection devices are distributed in various branches of the power supply network, and are used to monitor branch power changes, and perform data recording and processing according to the method of claim 1 after receiving notification from the communication device.

9. An electronic device, characterized in that: The electronic device includes a processor, a memory and a bus system, the processor and the memory are connected through the bus system, the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to implement the charging pile power supply network topology identification method described in any one of claims 1 to 7.

10. A computer storage medium, characterized in that The computer storage medium stores a computer software product, which includes several instructions for enabling a computer device to execute the charging pile power supply network topology identification method according to any one of claims 1 to 7.

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