AC charging pile fault analysis method and system based on data analysis

Abstract

The invention discloses an AC charging pile fault analysis method and system based on data analysis, and relates to the technical field of charging pile fault detection, and the method comprises the steps: carrying out the information matching processing of historical charging orders of an AC charging pile, and obtaining the historical charging orders of the same type; and based on the real-time input power of the charging equipment, performing information matching processing on the real-time input power of the AC charging pile and the real-time output power of the AC charging pile, and determining a first charging state of the AC charging pile. According to the method, firstly, the power of the alternating current charging pile during charging is compared and analyzed, whether the alternating current charging pile and the charging gun are abnormal or not is determined, it is guaranteed that electric energy of the alternating current charging pile is not greatly consumed, and the charging cost of the alternating current charging pile is reduced; and whether the charging current fluctuates in the charging process of the charging equipment by the alternating current charging pile is determined, and it is ensured that the charging equipment can be continuously and stably charged by the alternating current charging pile.

Description

Technical Field

[0001] This invention relates to the field of charging pile fault detection technology, specifically to a data analysis-based method and system for AC charging pile fault analysis. Background Technology

[0002] Charging piles are energy-charging devices that provide charging services for electric vehicles. Charging piles are mainly divided into ground-mounted charging piles and wall-mounted charging piles, primarily using time-based, energy-based, and cost-based charging methods. Charging piles can be fixed to the ground or walls and installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential parking lots or charging stations. They can charge various models of electric vehicles according to different voltage levels. The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. Most charging piles are public charging piles, generally providing both regular charging and fast charging methods. Users can use a specific charging card to swipe on the human-machine interface provided by the charging pile to perform operations such as selecting the charging method, charging time, and printing cost data. The charging pile display screen can display data such as charging amount, cost, and charging time.

[0003] AC charging stations may malfunction when charging devices. If a malfunctioning AC charging station is not repaired in time, it may be damaged or even spontaneously combusted when used to charge other devices, potentially causing a fire. Summary of the Invention

[0004] To address the aforementioned technical problems, a data analysis-based method and system for analyzing AC charging pile faults are provided. This technical solution resolves the issues raised in the background section.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A data analysis-based fault analysis method for AC charging piles includes: Obtain real-time charging orders and historical charging orders for AC charging piles. Based on the real-time charging orders, perform information matching processing on the historical charging orders of AC charging piles to obtain historical charging orders of the same type. The system acquires the real-time input power of the AC charging pile, the real-time output power of the AC charging pile, and the real-time input power of the charging equipment. Based on the real-time input power of the charging equipment, it performs information matching processing on the real-time input power and the real-time output power of the AC charging pile to determine the first charging state of the AC charging pile. Obtain the real-time charging duration of AC charging piles. Based on the real-time charging duration of AC charging piles, perform data analysis and processing on historical charging orders of the same type to determine the set of historical upper limit values ​​and the set of historical lower limit values ​​of charging current changes. The system acquires real-time charging current change data of AC charging piles, and performs comparative analysis on the real-time charging current change data of AC charging piles based on the historical upper limit value set and the historical lower limit value set of charging current change data to determine the second charging state of AC charging piles.

[0006] Preferably, obtaining the real-time charging orders and historical charging orders of the AC charging pile specifically includes the following steps: The nameplate information of the AC charging pile is read and processed to determine the manufacturer and type of the AC charging pile. Based on information about AC charging pile manufacturers and types of AC charging piles, data retrieval and processing were performed on the official websites of AC charging pile manufacturers to obtain equipment parameter data for AC charging piles. Extract and process the equipment parameter data of AC charging piles to obtain the communication protocol of AC charging piles; Based on the communication protocol of AC charging piles, data extraction and processing are performed on the order platform of AC charging piles to obtain real-time charging orders and historical charging orders of AC charging piles.

[0007] Preferably, the real-time charging orders based on AC charging piles, which involve matching historical charging orders of AC charging piles to obtain historical charging orders of the same type, specifically includes the following steps: The system reads and processes real-time charging orders from AC charging piles to determine the type of charging equipment and the preset charging duration. The system reads and processes historical charging orders from AC charging stations to obtain the charging duration of all historical charging orders. Based on the preset charging time, the charging time of all historical charging orders is filtered, and historical charging orders with a charging time greater than or equal to the preset charging time are set as historical charging orders that meet the charging time standard. Based on the type of charging equipment, information matching processing is performed on historical charging orders that meet the charging duration standard to obtain historical charging orders of the same type.

[0008] Preferably, obtaining the real-time input power of the AC charging pile, the real-time output power of the AC charging pile, and the real-time input power of the charging equipment specifically includes the following steps: Based on the communication protocol of AC charging piles, data reading and processing are performed on the input and output circuits of AC charging piles respectively to obtain the real-time input power and real-time output power of AC charging piles. Based on the type of charging equipment, information is extracted and processed from the official websites of charging equipment manufacturers to obtain equipment parameter data. Extract and process the device parameter data of the charging equipment to obtain the communication protocol of the charging equipment; Based on the communication protocol of the charging device, data reading and processing are performed on the charging device to obtain the real-time input power of the charging device.

[0009] Preferably, the step of performing information matching processing on the real-time input power and real-time output power of the AC charging pile based on the real-time input power of the charging equipment to determine the first charging state of the AC charging pile specifically includes the following steps: The difference between the real-time input power and the real-time output power of the AC charging pile is calculated to obtain the energy conversion loss value inside the AC charging pile. Determine whether the energy conversion loss value inside the AC charging pile is greater than the set energy conversion loss value threshold. If yes, report the abnormal information of energy conversion loss inside the AC charging pile. If no, the energy conversion loss inside the AC charging pile is normal. The difference between the real-time input power of the charging equipment and the real-time output power of the AC charging pile is calculated to obtain the energy transmission loss value of the charging gun. Determine whether the energy transmission loss value of the charging gun is greater than the set energy transmission loss value threshold. If yes, report abnormal information about the energy transmission loss of the charging gun. If no, the energy transmission loss of the charging gun is normal.

[0010] Preferably, the step of obtaining the real-time charging duration of the AC charging pile, and based on the real-time charging duration of the AC charging pile, performing data analysis and processing on historical charging orders of the same type to determine the historical upper limit set and the historical lower limit set of charging current changes specifically includes the following steps: Extract and process real-time charging orders from AC charging piles to obtain the real-time charging duration of AC charging piles; Extract and process information from historical charging orders of the same type to obtain historical charging duration and charging current variation data; Construct a time-current relationship rectangular coordinate system, wherein the X-axis parameter of the time-current relationship rectangular coordinate system is the time parameter, and the Y-axis parameter of the time-current relationship rectangular coordinate system is the current parameter; Based on historical charging duration and charging current variation data, curves are plotted in a time-current Cartesian coordinate system to obtain multiple sets of historical order current variation curves. Based on the real-time charging duration of AC charging piles, curve analysis is performed on multiple sets of historical order current change curves to determine the historical upper limit set and the historical lower limit set of charging current change.

[0011] Preferably, the step of performing curve analysis on multiple sets of historical order current change curves based on the real-time charging duration of the AC charging pile to determine the historical upper limit set and the historical lower limit set of charging current change specifically includes the following steps: Based on the real-time charging time of AC charging piles, the current change curves of multiple historical orders are extracted and processed to obtain partial current change curves of multiple historical orders. Data extraction and processing are performed on the current variation curves of multiple historical orders to obtain a set of current variation values ​​at different times; Based on the maximum value function, the data in the set of current change values ​​at different times are sorted to obtain the maximum and minimum current change values ​​at different times. The maximum and minimum current changes at different times are set as the historical upper limit and lower limit sets of charging current changes, respectively.

[0012] Preferably, the step of acquiring real-time charging current change data of the AC charging pile, and comparing and analyzing the real-time charging current change data of the AC charging pile based on the historical upper limit value set and the historical lower limit value set of charging current change data to determine the second charging state of the AC charging pile specifically includes the following steps: Based on the communication protocol of AC charging piles, data reading and processing are performed on AC charging piles to obtain real-time charging current change data of AC charging piles. Based on the real-time charging duration and real-time charging current change data of AC charging piles, curves are plotted in a time-current Cartesian coordinate system to obtain the current change curve of real-time charging orders. Based on the historical upper limit set and lower limit set of charging current changes, the current change curves of real-time charging orders are compared and analyzed to determine the second charging state of the AC charging pile.

[0013] Preferably, the step of comparing and analyzing the current change curves of real-time charging orders based on the historical upper limit set and the historical lower limit set of charging current changes to determine the second charging state of the AC charging pile specifically includes the following steps: The data in the historical upper limit set and the historical lower limit set of charging current change are respectively marked in a time-current relationship rectangular coordinate system containing the current change curve of real-time charging orders to obtain the upper limit value and the lower limit value of the charging current marking. If the current change curve of the real-time charging order is entirely between the upper limit and lower limit of the charging current mark, the AC charging pile is charging normally and there is no fault. If the current change curve of the real-time charging order is not completely between the upper limit and lower limit of the charging current mark, the AC charging pile will experience abnormal fluctuations in the charging current during the charging process, and an AC charging pile fault information will be reported.

[0014] Furthermore, a data analysis-based AC charging pile fault analysis system is proposed to implement the aforementioned data analysis-based AC charging pile fault analysis method, including: The fault analysis terminal is used to control the data transmission and information interaction between various modules. The fault analysis terminal is used to control the various modules to perform information matching, data analysis and data comparison on the real-time charging orders and historical charging orders of AC charging piles to determine whether there is a fault in the AC charging pile. The data extraction module extracts data from the AC charging pile and the charging equipment according to their respective communication protocols. The historical order filtering module filters historical charging orders of AC charging piles based on the type of charging equipment and preset charging duration to obtain historical charging orders of the same type. The first state determination module performs information matching processing on the real-time input power and real-time output power of the AC charging pile based on the real-time input power of the charging equipment, and determines the first charging state of the AC charging pile. The parameter determination module is used to extract and process data from multiple sets of historical order current change curves to obtain a set of historical upper limits and a set of historical lower limits for charging current changes. The second state determination module compares and analyzes the current change curve of the real-time charging order based on the historical upper limit set and the historical lower limit set of charging current change to determine the second charging state of the AC charging pile.

[0015] Compared with existing technologies, this invention provides a data analysis-based method and system for AC charging pile fault analysis, which has the following advantages: This invention first compares and analyzes the power of AC charging piles during charging to determine whether there are any abnormalities in the AC charging piles and charging guns, ensuring that the power of the AC charging piles will not be significantly lost and reducing the charging cost of AC charging piles. Secondly, it compares and analyzes the charging current of AC charging piles to determine whether there are any fluctuations in the charging current during the charging process of the AC charging piles, ensuring that the AC charging piles can continuously and stably charge the charging equipment. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating steps S100-S600 in a data analysis-based AC charging pile fault analysis method proposed in this invention. Figure 2 This is a structural block diagram of an AC charging pile fault analysis system proposed in this invention. Detailed Implementation

[0017] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] Reference Figure 1 As shown, a data analysis-based fault analysis method for AC charging piles includes: S100: Obtain real-time charging orders and historical charging orders for AC charging piles; S200: Based on real-time charging orders from AC charging piles, perform information matching processing on historical charging orders from AC charging piles to obtain historical charging orders of the same type. S300: Obtain the real-time input power of the AC charging pile, the real-time output power of the AC charging pile, and the real-time input power of the charging equipment. S400: Based on the real-time input power of the charging equipment, perform information matching processing on the real-time input power and real-time output power of the AC charging pile to determine the first charging state of the AC charging pile. S500: Obtain the real-time charging duration of AC charging piles; based on the real-time charging duration of AC charging piles, perform data analysis and processing on historical charging orders of the same type to determine the set of historical upper limit values ​​and the set of historical lower limit values ​​of charging current changes. S600: Obtain real-time charging current change data of AC charging pile; based on the historical limit set of charging current change and the historical lower limit set of charging current change, compare and analyze the real-time charging current change data of AC charging pile to determine the second charging state of AC charging pile. Those skilled in the art will understand that AC charging piles will age to varying degrees over time. If the aging is severe, the AC charging pile will malfunction. If the malfunctioning AC charging pile is not repaired in time and continues to be used to charge the charging equipment, the malfunctioning AC charging pile may experience power outages during charging, prolonging the charging time of the charging equipment, affecting the user experience, and even causing spontaneous combustion of the AC charging pile, thus causing a fire. Therefore, by comparing the real-time charging orders of the AC charging pile with the historical charging orders of the AC charging pile, the degree of aging of the AC charging pile can be determined, thereby determining whether the AC charging pile is malfunctioning.

[0019] Step S100, obtaining the real-time charging orders and historical charging orders of the AC charging pile, specifically includes the following steps: S101. Read and process the nameplate information of the AC charging pile to determine the manufacturer information and type of the AC charging pile. Understandably, each electronic device has a metal nameplate on its casing, which records the manufacturer and type of the device. Therefore, the device parameter data of the AC charging pile can be obtained based on the information on the nameplate. S102. Based on the manufacturer information and type of AC charging pile, perform data retrieval and processing on the official website of the AC charging pile manufacturer to obtain the equipment parameter data of the AC charging pile. S103. Extract and process the equipment parameter data of the AC charging pile to obtain the communication protocol of the AC charging pile. S104. Based on the communication protocol of AC charging piles, perform data extraction and processing on the order platform of AC charging piles to obtain real-time charging orders and historical charging orders of AC charging piles. It is understandable that different manufacturers of AC charging piles may use different internal components. Therefore, in order to extract historical charging orders for AC charging piles, it is necessary to first determine the communication protocol of the AC charging pile in order to obtain the real-time charging orders and historical charging orders of the AC charging pile.

[0020] Step S200: Based on the real-time charging orders of AC charging piles, perform information matching processing on the historical charging orders of AC charging piles to obtain historical charging orders of the same type. This specifically includes the following steps: S201. Read and process real-time charging orders for AC charging piles to determine the type of charging equipment and the preset charging duration; S202. Read and process the historical charging orders of AC charging piles to obtain the charging duration of all historical charging orders; S203. Based on the preset charging time, filter the charging time of all historical charging orders and set historical charging orders with a charging time greater than or equal to the preset charging time as historical charging orders that meet the charging time standard. S204. Based on the type of charging equipment, perform information matching processing on historical charging orders that meet the charging duration standard to obtain historical charging orders of the same type. In this embodiment, to determine whether an AC charging pile is faulty, it is necessary to compare the real-time status of the AC charging pile with its historical status. However, the status of the AC charging pile will vary depending on the charging device it is charging. Therefore, it is necessary to determine the type of charging device and the preset charging duration through the real-time charging orders of the AC charging pile. Then, the historical charging orders of the AC charging pile are filtered based on the type of charging device and the preset charging duration to obtain historical charging orders that are similar to the real-time charging orders of the AC charging pile (i.e., historical charging orders of the same type). By analyzing historical charging orders of the same type, the status of the AC charging pile is obtained more accurately.

[0021] Step S300, obtaining the real-time input power of the AC charging pile, the real-time output power of the AC charging pile, and the real-time input power of the charging equipment, specifically includes the following steps: S301. Based on the communication protocol of the AC charging pile, data reading and processing are performed on the input circuit and output circuit of the AC charging pile respectively to obtain the real-time input power and real-time output power of the AC charging pile. S302. Based on the type of charging equipment, extract and process information from the official websites of charging equipment manufacturers to obtain equipment parameter data of the charging equipment. S303. Extract and process the equipment parameter data of the charging equipment to obtain the communication protocol of the charging equipment. S304. Based on the communication protocol of the charging equipment, perform data reading and processing on the charging equipment to obtain the real-time input power of the charging equipment; It is understandable that AC charging piles charge charging devices by supplying power to the AC charging pile from an external power source. The AC charging pile converts external electrical energy into the energy required by the charging device. However, there will be some loss during the conversion process. When the loss is too large, it indicates that the AC charging pile has malfunctioned. Therefore, by comparing the power loss, it can be determined whether the AC charging pile has malfunctioned.

[0022] Step S400: Based on the real-time input power of the charging equipment, perform information matching processing on the real-time input power and real-time output power of the AC charging pile to determine the first charging state of the AC charging pile. This specifically includes the following steps: S401. Perform difference calculation on the real-time input power and real-time output power of the AC charging pile to obtain the energy conversion loss value inside the AC charging pile. S402. Determine whether the energy conversion loss value inside the AC charging pile is greater than the set energy conversion loss value threshold. If yes, report the abnormal information of energy conversion loss inside the AC charging pile. If no, the energy conversion loss inside the AC charging pile is normal. S403. Perform a difference calculation on the real-time input power of the charging equipment and the real-time output power of the AC charging pile to obtain the energy transmission loss value of the charging gun. S404. Determine whether the energy transmission loss value of the charging gun is greater than the set energy transmission loss value threshold. If yes, report the abnormal information of the energy transmission loss of the charging gun. If no, the energy transmission loss of the charging gun is normal. It is understandable that AC charging piles convert external power into the energy required by the charging equipment. During the conversion process, AC charging piles will experience some energy loss. If the loss is too large, it indicates that the internal components of the AC charging pile are severely aged, resulting in excessive losses. In addition, AC charging piles transmit electrical energy into the charging equipment through a charging gun, and the charging gun will also experience losses when transmitting electrical energy. Therefore, it is also necessary to judge the energy transmission loss value of the charging gun to determine whether the charging gun is malfunctioning.

[0023] Step S500: Obtain the real-time charging duration of the AC charging pile. Based on the real-time charging duration of the AC charging pile, perform data analysis and processing on historical charging orders of the same type to determine the historical upper limit set and the historical lower limit set of charging current changes. Specifically, this includes the following steps: S501. Extract and process information from the real-time charging orders of AC charging piles to obtain the real-time charging duration of AC charging piles. S502. Extract and process information from historical charging orders of the same type to obtain historical charging duration and charging current change data. S503. Construct a time-current relationship rectangular coordinate system, wherein the X-axis parameter of the time-current relationship rectangular coordinate system is the time parameter, and the Y-axis parameter of the time-current relationship rectangular coordinate system is the current parameter; S504. Based on historical charging duration and charging current variation data, perform curve plotting in a time-current Cartesian coordinate system to obtain multiple sets of historical order current variation curves. S505. Based on the real-time charging duration of AC charging piles, perform curve analysis on multiple sets of historical order current change curves to determine the historical upper limit set and the historical lower limit set of charging current change. Specifically, step S505, which involves analyzing the current change curves of multiple historical orders based on the real-time charging duration of the AC charging pile to determine the historical upper limit set and the historical lower limit set of charging current changes, includes the following steps: S5051. Based on the real-time charging time of AC charging piles, the current change curves of multiple historical orders are extracted and processed to obtain partial current change curves of multiple historical orders. S5052. Extract and process the data of partial current change curves of multiple historical orders to obtain a set of current change values ​​at different times; S5053. Based on the maximum value function, sort the data in the set of current change values ​​at different times to obtain the maximum value of current change and the minimum value of current change at different times. S5054. Set the maximum value of current change at different times and the minimum value of current change at different times as the historical limit set of charging current change and the historical lower limit set of charging current change, respectively. In this embodiment, since the AC charging pile is still charging the charging equipment, only a portion of the data from historical charging orders of the same type is available. Therefore, the current change curves of multiple historical orders are extracted based on the real-time charging duration of the AC charging pile. The extracted curves are the usable data. It is worth noting that the AC charging pile may suddenly malfunction, while the data in the historical charging orders of the same type are all data generated by the normal operation of the AC charging pile. Therefore, the partial current change curves of multiple historical orders are sorted to determine the maximum and minimum current change values ​​of the AC charging pile at each moment during charging. These values ​​are generated by the normal AC charging pile. Therefore, these values ​​are used to determine whether the current change of the AC charging pile during the charging process is normal.

[0024] Step S600: Obtain real-time charging current change data of the AC charging pile. Based on the historical upper limit set and the historical lower limit set of charging current change, compare and analyze the real-time charging current change data of the AC charging pile to determine the second charging state of the AC charging pile. This specifically includes the following steps: S601. Based on the communication protocol of AC charging pile, perform data reading and processing on AC charging pile to obtain real-time charging current change data of AC charging pile. S602. Based on the real-time charging duration and real-time charging current change data of the AC charging pile, perform curve plotting in the time-current relationship rectangular coordinate system to obtain the current change curve of the real-time charging order. S603. Based on the historical limit set of charging current change and the historical lower limit set of charging current change, the current change curve of real-time charging orders is compared and analyzed to determine the second charging state of the AC charging pile. Specifically, step S603, which involves comparing and analyzing the current change curves of real-time charging orders based on the historical upper limit set and the historical lower limit set of charging current changes, to determine the second charging state of the AC charging pile, includes the following steps: S6031. Mark the data in the historical upper limit set and the historical lower limit set of charging current change in the time-current relationship rectangular coordinate system containing the current change curve of real-time charging orders, and obtain the upper limit value of the charging current mark and the lower limit value of the charging current mark. S6032. If the current change curve of the real-time charging order is entirely between the upper limit and lower limit of the charging current mark, the AC charging pile is charging normally and there is no fault. S6033. If the current change curve of the real-time charging order is not completely between the upper limit value and the lower limit value of the charging current mark, and the AC charging pile experiences abnormal fluctuations in charging current during the charging process, report the AC charging pile fault information. It is understandable that AC charging piles will produce different current changes when charging the same charging equipment, and these current changes are normal. In order to reduce the amount of calculation of subsequent data, these data are filtered, that is, the maximum and minimum current changes are determined. As long as the real-time current change of the AC charging pile is within this range, the AC charging pile is operating normally and there is no fault.

[0025] Reference Figure 2 As shown, a data analysis-based AC charging pile fault analysis system is used to implement the data analysis-based AC charging pile fault analysis method described above, including: The fault analysis terminal is used to control the data transmission and information interaction between various modules. The fault analysis terminal is used to control the various modules to perform information matching, data analysis and data comparison on the real-time charging orders and historical charging orders of AC charging piles to determine whether there is a fault in the AC charging pile. The data extraction module extracts data from the AC charging pile and the charging equipment according to their respective communication protocols. The historical order filtering module filters historical charging orders of AC charging piles based on the type of charging equipment and preset charging duration to obtain historical charging orders of the same type. The first state determination module performs information matching processing on the real-time input power and real-time output power of the AC charging pile based on the real-time input power of the charging equipment, and determines the first charging state of the AC charging pile. The parameter determination module is used to extract and process data from multiple sets of historical order current change curves to obtain a set of historical upper limits and a set of historical lower limits for charging current changes. The second state determination module compares and analyzes the current change curve of the real-time charging order based on the historical upper limit set and the historical lower limit set of charging current change to determine the second charging state of the AC charging pile.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A fault analysis method for AC charging piles based on data analysis, characterized in that, include: Obtain real-time charging orders and historical charging orders for AC charging piles. Based on the real-time charging orders, perform information matching processing on the historical charging orders of AC charging piles to obtain historical charging orders of the same type. The system acquires the real-time input power of the AC charging pile, the real-time output power of the AC charging pile, and the real-time input power of the charging equipment. Based on the real-time input power of the charging equipment, it performs information matching processing on the real-time input power and the real-time output power of the AC charging pile to determine the first charging state of the AC charging pile. Obtain the real-time charging duration of AC charging piles. Based on the real-time charging duration of AC charging piles, perform data analysis and processing on historical charging orders of the same type to determine the set of historical upper limit values ​​and the set of historical lower limit values ​​of charging current changes. The system acquires real-time charging current change data of AC charging piles, and performs comparative analysis on the real-time charging current change data of AC charging piles based on the historical upper limit value set and the historical lower limit value set of charging current change data to determine the second charging state of AC charging piles.

2. The AC charging pile fault analysis method based on data analysis according to claim 1, characterized in that, The process of obtaining real-time charging orders and historical charging orders for AC charging piles specifically includes the following steps: The nameplate information of the AC charging pile is read and processed to determine the manufacturer and type of the AC charging pile. Based on information about AC charging pile manufacturers and types of AC charging piles, data retrieval and processing were performed on the official websites of AC charging pile manufacturers to obtain equipment parameter data for AC charging piles. Extract and process the equipment parameter data of AC charging piles to obtain the communication protocol of AC charging piles; Based on the communication protocol of AC charging piles, data extraction and processing are performed on the order platform of AC charging piles to obtain real-time charging orders and historical charging orders of AC charging piles.

3. The AC charging pile fault analysis method based on data analysis according to claim 2, characterized in that, The real-time charging order based on AC charging piles involves matching historical charging orders from AC charging piles to obtain historical charging orders of the same type, specifically including the following steps: The system reads and processes real-time charging orders from AC charging piles to determine the type of charging equipment and the preset charging duration. The system reads and processes historical charging orders from AC charging stations to obtain the charging duration of all historical charging orders. Based on the preset charging time, the charging time of all historical charging orders is filtered, and historical charging orders with a charging time greater than or equal to the preset charging time are set as historical charging orders that meet the charging time standard. Based on the type of charging equipment, information matching processing is performed on historical charging orders that meet the charging duration standard to obtain historical charging orders of the same type.

4. The AC charging pile fault analysis method based on data analysis according to claim 1, characterized in that, The process of obtaining the real-time input power of the AC charging pile, the real-time output power of the AC charging pile, and the real-time input power of the charging equipment specifically includes the following steps: Based on the communication protocol of AC charging piles, data reading and processing are performed on the input and output circuits of AC charging piles respectively to obtain the real-time input power and real-time output power of AC charging piles. Based on the type of charging equipment, information is extracted and processed from the official websites of charging equipment manufacturers to obtain equipment parameter data. Extract and process the device parameter data of the charging equipment to obtain the communication protocol of the charging equipment; Based on the communication protocol of the charging device, data reading and processing are performed on the charging device to obtain the real-time input power of the charging device.

5. The AC charging pile fault analysis method based on data analysis according to claim 4, characterized in that, The process of matching the real-time input power and real-time output power of the AC charging pile based on the real-time input power of the charging equipment to determine the first charging state of the AC charging pile specifically includes the following steps: The difference between the real-time input power and the real-time output power of the AC charging pile is calculated to obtain the energy conversion loss value inside the AC charging pile. Determine whether the energy conversion loss value inside the AC charging pile is greater than the set energy conversion loss value threshold. If yes, report the abnormal information of energy conversion loss inside the AC charging pile. If no, the energy conversion loss inside the AC charging pile is normal. The difference between the real-time input power of the charging equipment and the real-time output power of the AC charging pile is calculated to obtain the energy transmission loss value of the charging gun. Determine whether the energy transmission loss value of the charging gun is greater than the set energy transmission loss value threshold. If yes, report abnormal information about the energy transmission loss of the charging gun. If no, the energy transmission loss of the charging gun is normal.

6. The AC charging pile fault analysis method based on data analysis according to claim 3, characterized in that, The process of obtaining the real-time charging duration of AC charging piles, and based on that real-time charging duration, performing data analysis on historical charging orders of the same type to determine the historical upper limit set and the historical lower limit set of charging current changes, specifically includes the following steps: Extract and process real-time charging orders from AC charging piles to obtain the real-time charging duration of AC charging piles; Extract and process information from historical charging orders of the same type to obtain historical charging duration and charging current variation data; Construct a time-current relationship rectangular coordinate system, wherein the X-axis parameter of the time-current relationship rectangular coordinate system is the time parameter, and the Y-axis parameter of the time-current relationship rectangular coordinate system is the current parameter; Based on historical charging duration and charging current variation data, curves are plotted in a time-current Cartesian coordinate system to obtain multiple sets of historical order current variation curves. Based on the real-time charging duration of AC charging piles, curve analysis is performed on multiple sets of historical order current change curves to determine the historical upper limit set and the historical lower limit set of charging current change.

7. The AC charging pile fault analysis method based on data analysis according to claim 6, characterized in that, The process of analyzing multiple sets of historical order current variation curves based on the real-time charging duration of AC charging piles to determine the historical upper limit set and lower limit set of charging current variation specifically includes the following steps: Based on the real-time charging time of AC charging piles, the current change curves of multiple historical orders are extracted and processed to obtain partial current change curves of multiple historical orders. Data extraction and processing are performed on the current variation curves of multiple historical orders to obtain a set of current variation values ​​at different times; Based on the maximum value function, the data in the set of current change values ​​at different times are sorted to obtain the maximum and minimum current change values ​​at different times. The maximum and minimum current changes at different times are set as the historical upper limit and lower limit sets of charging current changes, respectively.

8. The AC charging pile fault analysis method based on data analysis according to claim 7, characterized in that, The process of acquiring real-time charging current change data of the AC charging pile, and comparing and analyzing the real-time charging current change data of the AC charging pile based on the historical upper limit value set and the historical lower limit value set of charging current change data to determine the second charging state of the AC charging pile, specifically includes the following steps: Based on the communication protocol of AC charging piles, data reading and processing are performed on AC charging piles to obtain real-time charging current change data of AC charging piles. Based on the real-time charging duration and real-time charging current change data of AC charging piles, curves are plotted in a time-current Cartesian coordinate system to obtain the current change curve of real-time charging orders. Based on the historical upper limit set and lower limit set of charging current changes, the current change curves of real-time charging orders are compared and analyzed to determine the second charging state of the AC charging pile.

9. The AC charging pile fault analysis method based on data analysis according to claim 8, characterized in that, The process of comparing and analyzing the current change curves of real-time charging orders based on the historical upper limit set and the historical lower limit set of charging current changes to determine the second charging state of the AC charging pile includes the following steps: The data in the historical upper limit set and the historical lower limit set of charging current change are respectively marked in a time-current relationship rectangular coordinate system containing the current change curve of real-time charging orders to obtain the upper limit value and the lower limit value of the charging current marking. If the current change curve of the real-time charging order is entirely between the upper limit and lower limit of the charging current mark, the AC charging pile is charging normally and there is no fault. If the current change curve of the real-time charging order is not completely between the upper limit and lower limit of the charging current mark, the AC charging pile will experience abnormal fluctuations in the charging current during the charging process, and an AC charging pile fault information will be reported.

10. A data analysis-based AC charging pile fault analysis system, used to implement the data analysis-based AC charging pile fault analysis method as described in any one of claims 1-9, characterized in that, include: The fault analysis terminal is used to control the data transmission and information interaction between various modules. The fault analysis terminal is used to control the various modules to perform information matching, data analysis and data comparison on the real-time charging orders and historical charging orders of AC charging piles to determine whether there is a fault in the AC charging pile. The data extraction module extracts data from the AC charging pile and the charging equipment according to their respective communication protocols. The historical order filtering module filters historical charging orders of AC charging piles based on the type of charging equipment and preset charging duration to obtain historical charging orders of the same type. The first state determination module performs information matching processing on the real-time input power and real-time output power of the AC charging pile based on the real-time input power of the charging equipment, and determines the first charging state of the AC charging pile. The parameter determination module is used to extract and process data from multiple sets of historical order current change curves to obtain a set of historical upper limits and a set of historical lower limits for charging current changes. The second state determination module compares and analyzes the current change curve of the real-time charging order based on the historical upper limit set and the historical lower limit set of charging current change to determine the second charging state of the AC charging pile.

Images