Graphical data acquisition method and system for power distribution network

Abstract

The invention provides a power distribution network graphical data acquisition method and system, and the method comprises the steps: firstly determining the importance degree of power distribution network equipment according to the influence degree when the power distribution network equipment breaks down, and then only arranging a data acquisition device at the important power distribution network equipment; in a first data transmission channel, three communication protocols with different architectures are adopted to transmit data, different encryption modes are adopted respectively, in a third data transmission channel, a user-defined encryption mode is adopted, then analysis is performed in a control center, judgment is performed according to the analyzed data transmitted by the three channels, and collection data is received and determined according to a judgment result. Besides, abnormity judgment is carried out on the data acquisition points before data transmission, abnormity monitoring of a detection device is also taken into consideration on the basis of guaranteeing the safety of a data transmission channel, and a foundation is laid for accurate display of graphical data.

Description

Technical Field

[0001] The present invention relates to a data acquisition method and system, and in particular to a distribution network graphical data acquisition method and system. Background Art

[0002] The "one map" of the distribution network refers to a map of the distribution network, that is, a source data, and "polymorphism" refers to the generation of distribution network thematic maps of different forms and types by computer intelligence based on a source data, including line geographic wiring diagrams, line orthogonal diagrams, line orthogonal detailed diagrams, station room diagrams, ring network diagrams, regional system diagrams and other forms of graphics to meet the application needs of power supply stations in different scenarios. The distribution network is based on the display method of one map and multiple states, which can simultaneously detect the operating status of multiple devices, display abnormalities in real time, and improve the accuracy of scheduling. Through multiple visualization states, different user ends can use visualization for management operations, making some power data easier to understand. However, in the display method of one map and multiple states, the graphical data all come from the same source detection and storage data. In the process of data collection detection and transmission, disturbances such as device failures, interference or network intrusion will be encountered, resulting in abnormal data collection, and then abnormal subsequent graphical display, causing system misjudgment, executing wrong display and commands, resulting in system failure or loss. Therefore, ensuring the accuracy of collected data and the security of transmission channels is the premise for achieving high-precision one map and multiple states display. For example, the invention patent application with patent document publication number CN118915632A discloses a method for real-time collection of industrial multi-source heterogeneous data, which adopts a hybrid method of wired transmission and wireless transmission to realize the collection of industrial field data, laying the foundation for subsequent industrial intelligence. Although it improves the security of data collection and transmission to a certain extent, the wireless transmission signal is easily interfered with, and its wired transmission and wireless transmission both use the same communication protocol. If a network attack occurs, the two data transmission channels will simultaneously produce abnormalities, resulting in inaccurate collected data.

[0003] In addition, device aging or failure is also one of the main reasons for abnormal data collection. How to ensure the security of the data transmission channel while taking into account device abnormality detection is also an urgent problem that the data acquisition system needs to solve.

[0004] Therefore, in order to meet the needs of one-image-multiple-state display, it is necessary to provide a data collection method and system that can accurately collect data and securely transmit it to a control center for subsequent graphical display. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to propose a distribution network graphical data acquisition method and system, which not only ensures the security of the data transmission channel, but also takes into account the abnormal monitoring of the detection device, laying the foundation for the accurate display of graphical data.

[0006] The present invention provides a distribution network graphical data acquisition system, the distribution network graphical data acquisition system comprising a data acquisition device, a control center, a database and a mobile terminal; The data acquisition device includes a sensor, a memory, a processor and an auxiliary module; The sensor is used to collect data of distribution network equipment, add a timestamp to the collected data and send it to the memory for storage; The auxiliary module splits the custom data into first split data and second split data according to the split instruction sent by the processor, and then sends the first split data and the second split data to the processor respectively; The processor extracts the data stored in the memory, first determines whether the data is abnormal, and if not, copies the stored data into first data, second data, and third data, and recombines the third data and the first split data, and then sends the first data to the control center through the first wired transmission channel, sends the second data to the control center through the second wired transmission channel, sends the recombined third data and the first split data to the control center through the third wired transmission channel, and sends the second split data to the control center through the fourth wired transmission channel; if yes, the processor sends abnormal reminder information to the control center and the mobile terminal; The control center analyzes the received data, obtains the collected data for graphical display, and stores the collected data in a database.

[0007] Preferably, the first wired transmission channel adopts a first communication protocol and a first encryption method, the second wired transmission channel adopts a second communication protocol and a second encryption method, and the third wired transmission channel and the fourth wired transmission channel adopt a third communication protocol.

[0008] Preferably, the control center also ranks the importance of distribution network equipment based on the impact of distribution network equipment failure according to historical data stored in the database, and sets a data acquisition device at the distribution network equipment whose ranking is less than or equal to the first threshold.

[0009] Preferably, the processor extracts the data stored in the memory and first determines whether the data is abnormal, specifically including: the processor draws a data curve of the data based on the data stored in the memory, and extracts the slope of the data curve for comparison; if the slope of the data curve exceeds a preset threshold or is similar to a fault data curve, the collected data is determined to be abnormal.

[0010] Preferably, the control center analyzes the received data and obtains the collected data for graphical display, which specifically includes: The control center restores the reorganized third data and the first split data, combines the first split data and the second split data, and receives the temporarily stored third data if there is no error; if there is an error, the control center notifies the collection device to resend the collected data; The control center analyzes and verifies the first data and the second data. If there is any error, the control center notifies the collection device to resend the collected data. If there is no error, the control center inputs the first data, the second data and the third data into the comparison module for comparison respectively. When the importance ranking of the distribution network equipment is less than or equal to the second threshold: if any of the first data, the second data and the third data is different, the control center notifies the collection device to resend the collected data; if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; When the importance ranking of the distribution network equipment is greater than the second threshold and less than or equal to the first threshold: if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; if any two or more of the three data are different, the control center notifies the collection device to resend the collected data; if any one of the first data, the second data and the third data is different, it is further determined which data is different: if the third data is different, the control center notifies the collection device to resend the collected data; if the first data or the second data is different, the third data is taken as the collected data for subsequent graphical display and storage.

[0011] In order to solve the above problem, the present invention also provides a distribution network graphical data collection method, which specifically includes the following steps: S1. Sort the importance of distribution network equipment based on the impact of distribution network equipment failure, and set a data acquisition device at the distribution network equipment whose ranking is less than or equal to a first threshold; S2, the data acquisition device collects data of distribution network equipment, adds a timestamp to the collected data, and sends it to an internally set memory for storage; S3, the data acquisition device processes the custom data, obtains the first split data and the second split data, and extracts the data stored in the memory, first determines whether the data is abnormal, if not, copies the stored data into the first data, the second data and the third data, and reorganizes the third data and the first split data; then sends the first data to the control center through the first wired transmission channel, sends the second data to the control center through the second wired transmission channel, sends the reorganized third data and the first split data to the control center through the third wired transmission channel, and sends the second split data to the control center through the fourth wired transmission channel; if yes, the processor sends abnormal reminder information to the control center and the mobile terminal; S4. The control center analyzes the received data, obtains the collected data for graphical display, and stores the collected data in a database.

[0012] Preferably, the data acquisition device processes the custom data to obtain first split data and second split data, specifically including: the data acquisition device includes a processor and an auxiliary module, the auxiliary module splits the custom data into first split data and second split data according to the splitting instruction sent by the processor, and then sends the first split data and the second split data to the processor respectively.

[0013] Preferably, the data acquisition device extracts the data stored in the memory and first determines whether the data is abnormal, specifically including: the processor draws a data curve of the data based on the data stored in the memory, and extracts the slope of the data curve for comparison; if the slope of the data curve exceeds a preset threshold or is similar to a fault data curve, the collected data is judged to be abnormal.

[0014] Preferably, the control center analyzes the received data and obtains the collected data for graphical display, which specifically includes: The control center restores the reorganized third data and the first split data, combines the first split data and the second split data, and receives the temporarily stored third data if there is no error; if there is an error, the control center notifies the collection device to resend the collected data; The control center analyzes and verifies the first data and the second data. If there is any error, the control center notifies the collection device to resend the collected data. If there is no error, the control center inputs the first data, the second data and the third data into the comparison module for comparison respectively. When the importance ranking of the distribution network equipment is less than or equal to the second threshold: if any of the first data, the second data and the third data is different, the control center notifies the collection device to resend the collected data; if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; When the importance ranking of the distribution network equipment is greater than the second threshold and less than or equal to the first threshold: if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; if any two or more of the three data are different, the control center notifies the collection device to resend the collected data; if any one of the first data, the second data and the third data is different, it is further determined which data is different: if the third data is different, the control center notifies the collection device to resend the collected data; if the first data or the second data is different, the third data is taken as the collected data for subsequent graphical display and storage.

[0015] Preferably, the first wired transmission channel adopts a first communication protocol and a first encryption method, the second wired transmission channel adopts a second communication protocol and a second encryption method, and the third wired transmission channel and the fourth wired transmission channel adopt a third communication protocol.

[0016] The beneficial effects of the present invention are: 1. Determine the importance of distribution network equipment according to the impact of distribution network equipment failure, and then only set up data acquisition devices at important distribution network equipment, while taking into account system security and reducing system setting and operation costs; 2. Three communication protocols with different architectures are used to transmit data at the same time, and different encryption methods are used respectively to reduce the risk of data interference. In addition, in the third data transmission channel, a custom encryption method is used to reduce the risk of data being intercepted and tampered. Finally, the control center analyzes the data and makes judgments based on the analyzed three-channel transmission data. The collected data is received and determined based on the judgment results. During the transmission process, the security of the data transmission channel is guaranteed based on multiple verification methods, and the accuracy of the collected data is improved; 3. After the sensor collects data, it is determined on-site whether the collected data is abnormal. Abnormality judgment is performed at the data collection point before data transmission, which can eliminate the interference of abnormal collection components and improve the accuracy of data collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the structure diagram of the distribution network graphical data acquisition system; Figure 2 This is a step diagram of the distribution network graphical data collection method. DETAILED DESCRIPTION

[0018] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0019] The solution provided by the embodiment of the present invention can be applied to any data acquisition system, and is particularly applicable to the data acquisition process of a distribution network graphical monitoring system. Example 1

[0020] Embodiment 1 of the present invention provides a distribution network graphical data acquisition system, such as Figure 1 As shown, the distribution network graphical data acquisition system includes a data acquisition device, a control center, a database and a mobile terminal; The data acquisition device includes a sensor, a memory, a processor and an auxiliary module; The sensor is used to collect data of distribution network equipment, add a timestamp to the collected data and send it to the memory for storage; The auxiliary module splits the custom data into first split data and second split data according to the split instruction sent by the processor, and then sends the first split data and the second split data to the processor respectively; The processor extracts the data stored in the memory, first determines whether the data is abnormal, and if not, copies the stored data into first data, second data, and third data, and recombines the third data and the first split data, and then sends the first data to the control center through the first wired transmission channel, sends the second data to the control center through the second wired transmission channel, sends the recombined third data and the first split data to the control center through the third wired transmission channel, and sends the second split data to the control center through the fourth wired transmission channel; if yes, the processor sends abnormal reminder information to the control center and the mobile terminal; The control center analyzes the received data, obtains the collected data for graphical display, and stores the collected data in a database.

[0021] The distribution network graphical data acquisition system provided by the present invention simultaneously adopts three communication protocols with different architectures to transmit data. Even if interference or network intrusion occurs, the probability of causing interference to the three communication protocols at the same time is much lower than that of a data acquisition system that adopts a single communication protocol for data transmission.

[0022] Specifically, the auxiliary module splits the custom data into first split data and second split data according to the split instruction sent by the processor, and then sends the first split data and the second split data to the processor respectively, including: The auxiliary module includes a signal generator and a microcontroller. The signal generator can be used to randomly generate one or more groups of waveforms or pulse signals containing multiple frequencies and amplitudes. The microcontroller receives a segmentation instruction sent by a processor, and the segmentation instruction contains a randomly set signal amplitude. The set signal amplitude is used as a boundary to divide the randomly generated waveform or pulse signal into an upper and lower part, that is, to obtain a first split data and a second split data, and then the first split data and the second split data are sent to the processor respectively.

[0023] The custom data may also be other forms of custom encrypted data, and is not limited to the above-mentioned signal generator randomly generating one or more groups of waveforms or pulse signals containing multiple frequencies and amplitudes.

[0024] Among them, further optionally, the first wired transmission channel adopts a first communication protocol and a first encryption method, the second wired transmission channel adopts a second communication protocol and a second encryption method, and the third wired transmission channel and the fourth wired transmission channel adopt a third communication protocol.

[0025] Specifically, the first communication protocol, the second communication protocol and the third communication protocol are wired communication protocols with different architectures, such as the first communication protocol can be IIC, the second communication protocol can be SPI, and the third communication protocol can be CAN. According to the communication interface protocol supported by the processor, any three qualified wired communication protocols can be selected from the existing communication protocols. The first encryption method can use CRC, and the second encryption method can use hash check. Any two of the existing communication encryption methods can be selected. Generally speaking, network interference or intrusion only interferes with the content of one communication protocol at the same time, that is, only targets or causes anomalies in one communication data. At the same time, selecting three different wired communication protocols to realize data transmission can effectively eliminate disturbances such as interference or network intrusion, and can improve the accuracy of acquiring collected data.

[0026] Among them, further optionally, the control center also ranks the importance of distribution network equipment based on the impact degree of distribution network equipment failure according to historical data stored in the database, and sets a data acquisition device at the distribution network equipment with a ranking less than or equal to a first threshold.

[0027] Among them, further optionally, the processor extracts the data stored in the memory and first determines whether the data is abnormal, specifically including: the processor draws a data curve of the data based on the data stored in the memory, and extracts the slope of the data curve for comparison; if the slope of the data curve exceeds a preset threshold or is similar to a fault data curve, the collected data is judged to be abnormal.

[0028] Among them, further optionally, the control center analyzes the received data to obtain the collected data for graphical display, specifically including: The control center restores the reorganized third data and the first split data, combines the first split data and the second split data, and receives the temporarily stored third data if there is no error; if there is an error, the control center notifies the collection device to resend the collected data; The control center analyzes and verifies the first data and the second data. If there is any error, the control center notifies the collection device to resend the collected data. If there is no error, the control center inputs the first data, the second data and the third data into the comparison module for comparison respectively. When the importance ranking of the distribution network equipment is less than or equal to the second threshold: if any of the first data, the second data and the third data is different, the control center notifies the collection device to resend the collected data; if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; When the importance ranking of the distribution network equipment is greater than the second threshold and less than or equal to the first threshold: if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; if any two or more of the three data are different, the control center notifies the collection device to resend the collected data; if any one of the first data, the second data and the third data is different, it is further determined which data is different: if the third data is different, the control center notifies the collection device to resend the collected data; if the first data or the second data is different, the third data is taken as the collected data for subsequent graphical display and storage.

[0029] Specifically, during the process of the control center analyzing the received data, if the data is found to be wrong or abnormal, the subsequent analysis process is stopped, and the collection device is notified to resend the collected data for processing, thereby improving the system data processing speed. Based on the further subdivision of the first threshold and the second threshold based on the importance ranking of the distribution network equipment, the second threshold is less than the first threshold, which can reduce the calculation pressure of the control center on the basis of ensuring the accuracy of the data collected by the most important distribution network equipment, and further improve the system response speed.

[0030] The processor converts the received first split data and the second split data into a data format supported by the third communication protocol, and then splices and reassembles the first split data and the third data, and sends the data to the control center via the third wired transmission channel; and sends the second split data to the control center via the fourth wired transmission channel; The control center receives data transmitted by the third and fourth wired transmission channels, first parses the reorganized third data and the first split data to obtain the third data and the first split data, and then converts the first split data and the second split data respectively, converts the two into waveform or pulse signal forms and splices them. If they can be restored to a randomly generated waveform or pulse signal, it is judged that the transmission is correct; otherwise, it is judged that the transmission is erroneous. Example 2

[0031] Based on the above distribution network graphical data acquisition system, the present invention provides another embodiment 2, which is as follows Figure 2 As shown, a distribution network graphical data collection method is provided, and the method specifically comprises the following steps: S1. Sort the importance of distribution network equipment based on the impact of distribution network equipment failure, and set a data acquisition device at the distribution network equipment whose ranking is less than or equal to a first threshold; S2, the data acquisition device collects data of distribution network equipment, adds a timestamp to the collected data, and sends it to an internally set memory for storage; S3, the data acquisition device processes the custom data, obtains the first split data and the second split data, and extracts the data stored in the memory, first determines whether the data is abnormal, if not, copies the stored data into the first data, the second data and the third data, and reorganizes the third data and the first split data; then sends the first data to the control center through the first wired transmission channel, sends the second data to the control center through the second wired transmission channel, sends the reorganized third data and the first split data to the control center through the third wired transmission channel, and sends the second split data to the control center through the fourth wired transmission channel; if yes, the processor sends abnormal reminder information to the control center and the mobile terminal; S4. The control center analyzes the received data, obtains the collected data for graphical display, and stores the collected data in a database.

[0032] Optionally, the data acquisition device processes the custom data to obtain first split data and second split data, specifically including: the data acquisition device includes a processor and an auxiliary module, the auxiliary module splits the custom data into first split data and second split data according to the splitting instruction sent by the processor, and then sends the first split data and the second split data to the processor respectively.

[0033] Optionally, the data acquisition device extracts data stored in the memory and first determines whether the data is abnormal, specifically including: the processor draws a data curve of the data based on the data stored in the memory, and extracts the slope of the data curve for comparison; if the slope of the data curve exceeds a preset threshold or is similar to a fault data curve, the collected data is judged to be abnormal.

[0034] Optionally, the control center analyzes the received data to obtain the collected data for graphical display, specifically including: The control center restores the reorganized third data and the first split data, combines the first split data and the second split data, and receives the temporarily stored third data if there is no error; if there is an error, the control center notifies the collection device to resend the collected data; The control center analyzes and verifies the first data and the second data. If there is any error, the control center notifies the collection device to resend the collected data. If there is no error, the control center inputs the first data, the second data and the third data into the comparison module for comparison respectively. When the importance ranking of the distribution network equipment is less than or equal to the second threshold: if any of the first data, the second data and the third data is different, the control center notifies the collection device to resend the collected data; if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; When the importance ranking of the distribution network equipment is greater than the second threshold and less than or equal to the first threshold: if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; if any two or more of the three data are different, the control center notifies the collection device to resend the collected data; if any one of the first data, the second data and the third data is different, it is further determined which data is different: if the third data is different, the control center notifies the collection device to resend the collected data; if the first data or the second data is different, the third data is taken as the collected data for subsequent graphical display and storage.

[0035] Optionally, the first wired transmission channel adopts a first communication protocol and a first encryption method, the second wired transmission channel adopts a second communication protocol and a second encryption method, and the third wired transmission channel and the fourth wired transmission channel adopt a third communication protocol.

[0036] The actions performed by the modules and units in the distribution network graphical data collection method in the embodiment of the present invention are all implemented based on the distribution network graphical data collection system in Example 1.

[0037] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a ROM, a RAM, etc.

[0038] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A distribution network graphical data acquisition system, characterized in that: The distribution network graphical data acquisition system includes a data acquisition device, a control center, a database and a mobile terminal; The data acquisition device includes a sensor, a memory, a processor and an auxiliary module; The sensor is used to collect data of distribution network equipment, add a timestamp to the collected data and send it to the memory for storage; The auxiliary module splits the custom data into first split data and second split data according to the split instruction sent by the processor, and then sends the first split data and the second split data to the processor respectively; The processor extracts the data stored in the memory, first determines whether the data is abnormal, and if not, copies the stored data into first data, second data, and third data, and recombines the third data and the first split data, and then sends the first data to the control center through the first wired transmission channel, sends the second data to the control center through the second wired transmission channel, sends the recombined third data and the first split data to the control center through the third wired transmission channel, and sends the second split data to the control center through the fourth wired transmission channel; if yes, the processor sends abnormal reminder information to the control center and the mobile terminal; The control center analyzes the received data, obtains the collected data for graphical display, and stores the collected data in a database.

2. A distribution network graphical data acquisition system as claimed in claim 1, characterized in that: The first wired transmission channel adopts a first communication protocol and a first encryption method, the second wired transmission channel adopts a second communication protocol and a second encryption method, and the third wired transmission channel and the fourth wired transmission channel adopt a third communication protocol.

3. A distribution network graphical data acquisition system as claimed in claim 1, characterized in that: The control center also ranks the importance of distribution network equipment based on the impact of distribution network equipment failure according to historical data stored in the database, and sets a data collection device at the distribution network equipment whose ranking is less than or equal to the first threshold.

4. A distribution network graphical data acquisition system as claimed in claim 1, characterized in that: The processor extracts the data stored in the memory and first determines whether the data is abnormal, specifically including: the processor draws a data curve of the data based on the data stored in the memory, and extracts the slope of the data curve for comparison; if the slope of the data curve exceeds a preset threshold or is similar to a fault data curve, the collected data is determined to be abnormal.

5. A distribution network graphical data acquisition system as claimed in claim 3, characterized in that: The control center analyzes the received data and obtains the collected data for graphical display, which specifically includes: The control center restores the reorganized third data and the first split data, combines the first split data and the second split data, and receives the temporarily stored third data if there is no error; if there is an error, the control center notifies the collection device to resend the collected data; The control center analyzes and verifies the first data and the second data. If there is any error, the control center notifies the collection device to resend the collected data. If there is no error, the control center inputs the first data, the second data and the third data into the comparison module for comparison respectively. When the importance ranking of the distribution network equipment is less than or equal to the second threshold: if any of the first data, the second data and the third data is different, the control center notifies the collection device to resend the collected data; if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; When the importance ranking of the distribution network equipment is greater than the second threshold and less than or equal to the first threshold: if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; if any two or more of the three data are different, the control center notifies the collection device to resend the collected data; if any one of the first data, the second data and the third data is different, it is further determined which data is different: if the third data is different, the control center notifies the collection device to resend the collected data; if the first data or the second data is different, the third data is taken as the collected data for subsequent graphical display and storage.

6. A distribution network graphical data collection method, characterized in that: The method specifically comprises the following steps: S1. Sort the importance of distribution network equipment based on the impact of distribution network equipment failure, and set a data acquisition device at the distribution network equipment whose ranking is less than or equal to a first threshold; S2, the data acquisition device collects data of distribution network equipment, adds a timestamp to the collected data, and sends it to an internally set memory for storage; S3, the data acquisition device processes the custom data, obtains the first split data and the second split data, and extracts the data stored in the memory, first determines whether the data is abnormal, if not, copies the stored data into the first data, the second data and the third data, and reorganizes the third data and the first split data; then sends the first data to the control center through the first wired transmission channel, sends the second data to the control center through the second wired transmission channel, sends the reorganized third data and the first split data to the control center through the third wired transmission channel, and sends the second split data to the control center through the fourth wired transmission channel; if yes, the processor sends abnormal reminder information to the control center and the mobile terminal; S4. The control center analyzes the received data, obtains the collected data for graphical display, and stores the collected data in a database.

7. A distribution network graphical data acquisition system as claimed in claim 6, characterized in that: The data acquisition device processes the custom data to obtain first split data and second split data, specifically including: the data acquisition device includes a processor and an auxiliary module, the auxiliary module splits the custom data into first split data and second split data according to the segmentation instruction sent by the processor, and then sends the first split data and the second split data to the processor respectively.

8. A distribution network graphical data acquisition system as claimed in claim 7, characterized in that: The data acquisition device extracts data stored in the memory and first determines whether the data is abnormal, specifically including: the processor draws a data curve of the data based on the data stored in the memory, and extracts the slope of the data curve for comparison; if the slope of the data curve exceeds a preset threshold or is similar to a fault data curve, the collected data is determined to be abnormal.

9. A distribution network graphical data acquisition system as claimed in claim 8, characterized in that: The control center analyzes the received data and obtains the collected data for graphical display, which specifically includes: The control center restores the reorganized third data and the first split data, combines the first split data and the second split data, and receives the temporarily stored third data if there is no error; if there is an error, the control center notifies the collection device to resend the collected data; The control center analyzes and verifies the first data and the second data. If there is any error, the control center notifies the collection device to resend the collected data. If there is no error, the control center inputs the first data, the second data and the third data into the comparison module for comparison respectively. When the importance ranking of the distribution network equipment is less than or equal to the second threshold: if any of the first data, the second data and the third data is different, the control center notifies the collection device to resend the collected data; if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; When the importance ranking of the distribution network equipment is greater than the second threshold and less than or equal to the first threshold: if the first data, the second data and the third data are the same, any one of the data is taken as the collected data for subsequent graphical display and storage; if any two or more of the three data are different, the control center notifies the collection device to resend the collected data; if any one of the first data, the second data and the third data is different, it is further determined which data is different: if the third data is different, the control center notifies the collection device to resend the collected data; if the first data or the second data is different, the third data is taken as the collected data for subsequent graphical display and storage.

10. A distribution network graphical data acquisition system as claimed in claim 6, characterized in that: The first wired transmission channel adopts a first communication protocol and a first encryption method, the second wired transmission channel adopts a second communication protocol and a second encryption method, and the third wired transmission channel and the fourth wired transmission channel adopt a third communication protocol.

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