Communication method for microcomputer integrated protection device and microcomputer integrated protection device

Abstract

The present application relates to the field of data communication technology for microcomputer integrated protection devices, and specifically to a communication method for microcomputer integrated protection devices and a microcomputer integrated protection device, the method comprising: collecting electrical parameter data of the microcomputer integrated protection device at each collection moment; then obtaining the parameter volatility of each category of electrical parameter data at each collection moment in each communication period; calculating the coordinated change factor of each category of electrical parameter data at each collection moment in each communication period, and then calculating the information criticality of each collection moment in each communication period; obtaining the key collection moment of each communication period; dividing the data packets of the microcomputer integrated protection device, calculating the information criticality of each data packet; obtaining the transmission priority factor of each data packet, and communicating and transmitting the electrical parameter data in the data packet. The present application solves the problem of delayed transmission of key data in the power system, which leads to being marked as low priority and lost during the communication process.

Description

Technical Field

[0001] The present application relates to the technical field of data communication for microcomputer integrated protection devices, and in particular to a communication method for a microcomputer integrated protection device and a microcomputer integrated protection device. Background Art

[0002] The microcomputer integrated protection device is tailor-made for the high-voltage distribution room of the distribution network terminal. It takes three-stage non-directional current protection as the core. It is an economical power system protection device for integrated measurement, control, protection and communication. It is equipped with the monitoring and collection function of power grid parameters. It can monitor and protect the operating status of the power system in real time, which has a significant positive impact on improving power supply reliability, reducing maintenance costs and the automated operation of smart grids.

[0003] When the microcomputer integrated protection device uses Ethernet to communicate, it has the advantages of high bandwidth, high flexibility and high reliability, which is convenient for integration with other monitoring systems and equipment, and because the infrastructure of Ethernet is relatively mature, the installation and maintenance components are relatively low; in the process of the microcomputer integrated protection device using Ethernet to communicate, the priority of the data packet has a significant impact on the communication quality, and it is difficult to determine the priority of the data packet according to the data characteristics collected and obtained by the microcomputer integrated protection device in the prior art, which may cause delays in the transmission of key data of the microcomputer integrated protection device, or even the situation where the key data is marked as low priority and discarded during the communication process. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of this application is to provide a communication method for a microcomputer integrated protection device and a microcomputer integrated protection device. The technical solutions adopted are as follows:

[0005] In a first aspect, an embodiment of the present application provides a communication method for a microcomputer integrated protection device, the method comprising the following steps:

[0006] Collecting electrical parameter data of the microcomputer integrated protection device at each collection moment, the types of electrical parameter data include: voltage data, current data, active power and reactive power;

[0007] Based on the differences between the electrical parameter data in the same category and the differences between the slopes of the electrical parameter data on the fitting curve during the communication period, the parameter volatility of the electrical parameter data of each category at each collection time in each communication period is obtained;

[0008] Based on the differences between the periodic variation patterns of the electrical parameter data, the coordinated variation factors of the electrical parameter data of each category at each collection moment in each communication period are obtained; based on the parameter volatility and the value of the coordinated variation factor, the criticality of the information at each collection moment in each communication period is obtained;

[0009] Based on the criticality of information and combined with the threshold segmentation algorithm, the key acquisition moments of each communication period are obtained; the electrical parameter data of the microcomputer integrated protection device are divided into data packets; based on the number of key acquisition moments in each data packet and the time interval between key acquisition moments, the information criticality of each data packet is obtained;

[0010] Based on the criticality of information and the similarity between the key collection moments of each data packet, the transmission priority factor of each data packet is obtained; and the electrical parameter data in the data packet is communicated and transmitted according to the transmission priority factor.

[0011] Further, the method for obtaining the parameter volatility is:

[0012] For each type of electrical parameter data, a sequence of electrical parameter data in each communication period is used as input, a fitting curve of each type of electrical parameter data in each communication period is obtained, and the slope of the electrical parameter data at each acquisition moment on the fitting curve is calculated as the slope of the electrical parameter data at each acquisition moment;

[0013] The formula for the parameter volatility is: ; In the formula, is the parameter volatility of the electrical parameter data of the ith category at the jth collection moment in each communication period; is the absolute value of the difference between the electrical parameter data of the i-th category at the j-th collection time in the communication period and the mean value of the electrical parameter data of all previous collection times; is the cumulative result of the absolute value of the difference between the slopes of the fitting curve of the electrical parameter data of the ith category in each communication period at the jth collection time and the j+1th and j-1th collection times; Adjust parameters for the preset.

[0014] Further, the method for obtaining the synergistic variation factor is:

[0015] For each category of electrical parameter data, the sequence composed of the electrical parameter data of each communication period is used as the input of the STL sequence decomposition algorithm, and the output is the seasonal intensity of each category of electrical parameter data at each collection time in each communication period;

[0016] For each collection moment in each communication time period, the absolute value of the difference between the seasonal intensity of each category of electrical parameter data and other categories of electrical parameter data is calculated, and the sum of all the absolute values ​​of the difference of each category of electrical parameter data is calculated as the coordinated change factor of each category of electrical parameter data at each collection moment in each communication time period.

[0017] Furthermore, the calculation formula for the criticality of the information is: ; In the formula, is the criticality of information at the jth collection moment in each communication period; , are the parameter volatility and coordinated change factor of the electrical parameter data of the ith category at the jth acquisition moment in each communication period; norm[] is the normalization function; is the total number of categories of electrical parameter data.

[0018] Furthermore, the method for obtaining the key acquisition moment is:

[0019] The information criticality of all acquisition moments in each communication period is used as the input of the threshold segmentation algorithm, and the segmentation threshold is output. The acquisition moments with information criticality greater than or equal to the segmentation threshold in each communication period are used as the key acquisition moments in each communication period.

[0020] Furthermore, each data packet contains all types of electrical parameter data at all collection moments in each communication period.

[0021] Furthermore, the method for obtaining the criticality of the information is:

[0022] For each data packet, the ratio of the number of key acquisition moments in the data packet to the total number of all key acquisition moments in all data packets is calculated, the cumulative result of the time intervals between all key acquisition moments in the data packet is calculated, and the quotient of the ratio and the cumulative result is taken as the information criticality of each data packet.

[0023] Furthermore, the calculation formula of the transmission priority factor is: ; In the formula, is the transmission priority factor of the xth data packet; is the information criticality of the xth data packet; is the total number of data packets; , are sequences composed of the key collection moments of the xth and yth data packets in positive time order; is the cosine similarity; norm[] is the normalization function.

[0024] Further, the communication transmission of the electrical parameter data according to the transmission priority factor includes:

[0025] The data packets to be transmitted are divided into priorities according to the descending order of the transmission priority factors of the data packets, and the electrical parameter data in the data packets to be transmitted are communicated and transmitted according to the priorities.

[0026] In a second aspect, an embodiment of the present application also provides a microcomputer integrated protection device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of any one of the above-mentioned methods when executing the computer program.

[0027] This application has at least the following beneficial effects:

[0028] The present application obtains the information criticality of each collection moment within the communication period through the volatility and coordinated change characteristics of various categories of electrical parameter data obtained by the microcomputer integrated protection device, and adds the consideration of the coordinated change of different categories of electrical parameter data on the basis of analyzing the fluctuation status of various categories of electrical parameter data in the power system, which more accurately reflects the information criticality of each collection moment within the communication period of the microcomputer integrated protection device; the key collection moments are screened according to the information criticality, and the transmission priority factor is obtained through the key information characteristics contained in the data packets in the communication module of the microcomputer integrated protection device and the correlation characteristics between the data packets, and the priority of the data packets is completed, and the amount of key information contained in the data packets in the process of monitoring the power system by the microcomputer integrated protection device and the connection between the key information between the data packets are comprehensively considered, which more accurately reflects the transmission priority status of each data packet in the communication module of the microcomputer integrated protection device, solves the problem of delayed transmission of key data in the power system, which leads to being marked as low priority and lost during the communication process, so that the acquired key data of the power system can be transmitted and processed in time, and the communication reliability of the microcomputer integrated protection device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A flow chart of the steps of a communication method for a microcomputer integrated protection device provided in one embodiment of the present application;

[0031] Figure 2 A schematic diagram of a communication period fitting curve provided by an embodiment of the present application;

[0032] Figure 3 A schematic diagram of dividing communication time periods provided for one embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the following is a detailed description of the communication method for the microcomputer integrated protection device and the microcomputer integrated protection device proposed in the present application, its specific implementation method, structure, features and effects, in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0034] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0035] The following describes in detail the communication method for the microcomputer integrated protection device and the specific scheme of the microcomputer integrated protection device provided by the present application in conjunction with the accompanying drawings.

[0036] See also Figure 1 , which shows a flow chart of the steps of a communication method for a microcomputer integrated protection device provided by an embodiment of the present application, the method comprising the following steps:

[0037] Step S1, obtaining the electrical parameter data collected by the microcomputer integrated protection device and preprocessing the data to be transmitted.

[0038] The data acquisition module in the microcomputer integrated protection device is used to collect different types of electrical parameter data in the power system, including current, voltage, active power, and reactive power. The time interval for collecting the above-mentioned electrical parameter data of each category in the power system is 1s, and each hour is divided into communication periods. In order to prevent the data acquisition module from being lost due to network fluctuations or external environmental interference when the acquired data is transmitted to the measurement module, and to prevent the different dimensions of different types of electrical parameters from affecting subsequent analysis, the median filling method and Z-Score standardization are used to fill in missing values ​​and unify dimensions of the acquired electrical parameter data of each category. Since the median filling method is a well-known technology, the specific acquisition process will not be described in detail.

[0039] At this point, the electrical parameter data sequences of various categories collected by the microcomputer integrated protection device can be obtained according to the above method.

[0040] Step S2, obtaining the information criticality of each collection moment in the communication period through the volatility and coordinated change characteristics of various types of electrical parameter data obtained by the microcomputer integrated protection device.

[0041] The various types of electrical parameter time series data obtained by the microcomputer integrated protection device can effectively reflect the operating status and load change of the power system, which is convenient for the subsequent determination of the key data of the microcomputer integrated protection device for communication transmission; in the various types of electrical parameter time series data obtained by the data acquisition module of the microcomputer integrated protection device, external environmental interference such as electromagnetic interference, temperature, and humidity can also cause changes in electrical parameter data, but the electrical parameter fluctuations caused by external environmental interference usually cannot effectively reflect the state changes of the power system, and thus do not belong to key data. Under normal circumstances, the abnormal fluctuations of various types of electrical parameter data caused by changes in the operating status of the power system are more significant than the electrical parameter fluctuations caused by external environmental interference, and the instantaneous change characteristics are obvious.

[0042] Based on the above analysis, for each type of electrical parameter data, the sequence of electrical parameter data in each communication period is used as input, and the least square method is used to obtain the fitting curve of each type of electrical parameter data in each communication period, and the slope of the electrical parameter data at each acquisition moment on the fitting curve is calculated as the slope of the electrical parameter data at each acquisition moment. Among them, the schematic diagram of the communication period fitting curve is shown in Figure 2 As shown, the horizontal axis is time, and the vertical axis is the normalized current data value.

[0043] The calculation formula for the parameter volatility of electrical parameter data at each acquisition moment during the communication period is: ; In the formula, is the parameter volatility of the i-th category electrical parameter data at the j-th collection moment in the communication period; is the absolute value of the difference between the jth collection time of the i-th category electrical parameter data in the communication period and the mean value of the electrical parameter data at all previous collection times, in order to prevent the local fluctuation of the electrical parameter data from being too small, resulting in too small a slope difference, which would affect the calculation of parameter volatility; is the cumulative result of the absolute value of the difference between the slopes of the fitting curve corresponding to the i-th category electrical parameter data at the j-th acquisition time and the j+1-th and j-1-th acquisition times; To preset the adjustment parameter, the value in this application is 0.1 to prevent the denominator from being 0.

[0044] When the abnormal fluctuation of the corresponding electrical parameter data of the power system at any collection moment is more likely to be caused by a change in the operating state rather than by interference from the external environment, the more significant the fluctuation degree of the electrical parameter data, the slighter the instantaneous change characteristics, and the greater the parameter volatility, that is, the greater the absolute value of the difference between the electrical parameter data at the collection moment in the communication period and the mean of the corresponding electrical parameter data at all previous collection moments, the smaller the cumulative result of the absolute value of the difference in the slope of the fitting curve corresponding to the electrical parameter data at any collection moment and its previous collection moment and next collection moment.

[0045] Normally, due to the mutual coupling between electrical equipment and circuits, when the operating state of the power system changes, changes in one type of electrical parameter data will also cause changes in other types of electrical parameter data. The more significant the coordinated changes between various types of electrical parameter data of the power system obtained by the microcomputer integrated protection device at any collection moment, the stronger the key characteristics of the electrical parameter data of the power system at any collection moment, that is, the more it can provide the change status of the operating state of the power system.

[0046] Based on the above analysis, for each category of electrical parameter data, the sequence composed of the electrical parameter data of each communication period is used as the input of the STL (Seasonal and Trend decomposition using Loess) sequence decomposition algorithm, and the output is the seasonal intensity of each category of electrical parameter data at each collection time in each communication period. The STL sequence decomposition algorithm is a well-known technology and will not be described here.

[0047] The calculation formula for the coordinated change factor of any category of electrical parameter data at any collection time in each communication period is: ; In the formula, is the coordinated change factor of the i-th category electrical parameter data at the j-th collection moment in each communication period; is the total number of categories of electrical parameter data; , They are the seasonal intensities of the electrical parameter data of the i-th and k-th categories at the j-th collection moment in the communication period.

[0048] The stronger the key characteristics of various categories of electrical parameter data in the power system at any collection moment, the more significant the coordinated changes of various categories of electrical parameter data in the power system at the collection moment, and the larger the coordinated change factor, that is, the smaller the difference between the seasonal intensities corresponding to various categories of electrical parameter data in the power system at the collection moment.

[0049] In the communication process of the microcomputer integrated protection device, the priority of the data packet is closely related to the communication quality, and the priority of the data packet is closely related to the contribution of the data information in the data packet; when the microcomputer integrated protection device monitors the power system, the electrical parameter data at the time of collecting the change of the power system operation status and the time of collecting the coordinated change of the electrical parameter data can better represent the criticality of the monitoring information, and provide data support for the determination of the priority of subsequent data packets.

[0050] Based on the above analysis, the criticality of information at any collection time during the communication period can be calculated as follows: ; In the formula, is the criticality of information at the jth collection moment in each communication period; , are the parameter volatility and coordinated change factor of the i-th category electrical parameter data at the j-th acquisition time during the communication period; norm[] is the normalization function, so that The value range of is in the range of [0, 1]; is the total number of categories of electrical parameter data.

[0051] When the microcomputer integrated protection device monitors the power system, the more any collection moment within the communication period can represent the criticality of the monitoring information, the more significant the fluctuation of various categories of electrical parameter data in the power system at the collection moment, the slighter the instantaneous change characteristics, the more obvious the coordinated change between various categories of electrical parameter data, and the stronger the information criticality, that is, the stronger the parameter volatility at the collection moment, the larger the coordinated change factor.

[0052] At this point, the criticality of information at each acquisition moment in each communication period during the monitoring process of the microcomputer integrated protection device can be obtained according to the above method.

[0053] Step S3, screening the key collection moments according to the criticality of the information, and dividing the electrical parameter data obtained by the microcomputer integrated protection device into data packets.

[0054] The information criticality of all the collection moments in each communication period is taken as input, and the OTSU method is used to obtain the segmentation threshold of the information criticality of all the collection moments in the communication period. The collection moments with information criticality greater than or equal to the segmentation threshold in the communication period are recorded as the key collection moments of the communication period. Figure 3 shown.

[0055] The electrical parameters of various categories obtained by the microcomputer integrated protection device are divided into data packets. The specific process is as follows:

[0056] The data acquisition module of the microcomputer integrated protection device converts all types of electrical parameter data obtained into the data format specified by the TCP protocol, and sets each data packet message to include the source MAC address (6 bits), the target MAC address (6 bits), the Ethernet type (2 bits), the electrical parameter data message (64~1500 bits, the minimum length of the Ethernet frame message is 64 bits, the purpose is to ensure that the most extreme conflicts can be detected, 64 bits is the minimum value that can be detected, and the maximum is 1500 bits because the maximum Ethernet data frame is 1518 bits. The 1500-bit data message can prevent the data packet from being too large, resulting in a long transmission time, and the phenomenon of occupying the shared link seriously causes other services to be blocked) and CRC cyclic redundancy check (4 bits). Among them, each data packet contains all types of electrical parameter data at all acquisition times in each communication period. Since the OTSU Otsu method and data packet division are both well-known technologies, the specific acquisition process will not be described in detail.

[0057] At this point, the division of key acquisition moments within the communication period and the division of data packets of the microcomputer integrated protection device can be achieved according to the above method.

[0058] Step S4, obtaining the transmission priority factor through the key information characteristics contained in the data packets in the communication module of the microcomputer integrated protection device and the correlation characteristics between the data packets.

[0059] In each data packet to be transmitted at the sending end of the communication module of the microcomputer integrated protection device, the more key information that can characterize the monitoring process of the microcomputer integrated protection device is contained in the data packet, the more quickly the data packet needs to be responded to and processed, and the higher the priority it needs to have in the communication process of the microcomputer integrated protection device, so as to ensure that the key information of the power system obtained by the microcomputer integrated protection device is quickly transmitted and processed, thereby improving the reliability and safety of the power system.

[0060] Based on the above analysis, the calculation formula for the information criticality of any data packet to be transmitted in the communication module of the microcomputer integrated protection device is: ; In the formula, is the information criticality of the xth data packet; is the ratio of the number of key acquisition moments in the xth data packet to the total number of key acquisition moments in all data packets; The result is accumulated for the time intervals between all key acquisition moments in the xth data packet.

[0061] The more the data packets to be transmitted in the communication module of the microcomputer integrated protection device need to be transmitted and processed quickly, the more key information that can characterize the monitoring process of the microcomputer integrated protection device is contained in the data packet, the more significant the frequency of changes in the operating status of the power system contained in the data packet, and the stronger the information criticality of the data packet, that is, the greater the proportion of the number of key acquisition moments in the data packet to the total number of key acquisition moments in all electrical parameter data, and the smaller the cumulative result of the time intervals between all key acquisition moments in the data packet.

[0062] When the priority of a data packet is determined only by the amount of key information of the microcomputer integrated protection device monitoring process contained in the data packet and the frequency of changes in the operating status of the power system, the correlation analysis between data packets is ignored. There may be data packets with less key information but strong correlation with other data packets to be transmitted, which have lower priority and cannot be responded to and processed quickly, affecting the monitoring reliability of the microcomputer integrated protection device.

[0063] Therefore, the sequence of all key acquisition moments in each data packet in chronological order is used as the key acquisition moment sequence of each data packet. The transmission priority factor of any data packet to be transmitted in the communication module of the microcomputer integrated protection device can be calculated as follows: ; In the formula, is the transmission priority factor of the xth data packet; is the information criticality of the xth data packet; is the total number of data packets; , are sequences composed of the key collection moments of the xth and yth data packets in positive time order; is the cosine similarity; norm[] is the normalization function, making The value range of is between [0, 1].

[0064] When the priority of the data packet to be transmitted in the communication module of the microcomputer integrated protection device is higher, the data packet contains more key information of the monitoring process of the microcomputer integrated protection device, the correlation between the data packet and the other data packets is stronger, and the transmission priority factor is larger, that is, the more critical the information of the data packet is, the greater the cumulative result of the cosine similarity between the data packet and the corresponding key acquisition time sequence of the other data packets in the communication module of the microcomputer integrated protection device.

[0065] At this point, the transmission priority factors of all data packets in the communication module of the microcomputer integrated protection device can be obtained through the above method.

[0066] Step S5, dividing the data packet transmission priority according to the data packet transmission priority factor, and realizing the communication method of the microcomputer integrated protection device.

[0067] The data packets to be transmitted in the communication module of the microcomputer integrated protection device are divided into priorities in descending order according to the data packet transmission priority factors, and the data packets to be transmitted are transmitted according to the priorities.

[0068] When the microcomputer integrated protection device receives a communication transmission request, it obtains the communication address of the communication object, divides the power system related electrical parameter data obtained by the microcomputer integrated protection device into data packets and determines the priority of each data packet in accordance with the method described in this application, writes the data packet to be transmitted into the sending buffer in the communication module of the microcomputer integrated protection device, and starts the transmission of the data packet when the communication interface is triggered. When the data transmission is completed, the microcomputer integrated protection device waits for the confirmation signal or response information of the communication object; when the sending end of the communication module of the microcomputer integrated protection device times out and does not receive the communication response from the receiving end of the communication object, the communication module of the microcomputer integrated protection device retransmits the data packet, wherein the CRC check is used to detect errors that may occur during the transmission process.

[0069] At this point, the communication transmission of the microcomputer integrated protection device can be completed through the above method, realizing a communication method for a microcomputer integrated protection device and a microcomputer integrated protection device.

[0070] Based on the same inventive concept as the above-mentioned method, an embodiment of the present application also provides a microcomputer integrated protection device, including a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the steps of the communication method for the microcomputer integrated protection device described in any one of the above-mentioned communication methods for the microcomputer integrated protection device are implemented.

[0071] It should be noted that the above sequence of the embodiments of the present application is for description only and does not represent the advantages and disadvantages of the embodiments. The above is a description of a specific embodiment of this specification. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0072] The various embodiments in the present application are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0073] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application should be included in the protection scope of the present application.

Claims

1. A communication method for a microcomputer integrated protection device, characterized in that: The method comprises the following steps: Collecting electrical parameter data of the microcomputer integrated protection device at each collection moment, the types of electrical parameter data include: voltage data, current data, active power and reactive power; Based on the differences between the electrical parameter data in the same category and the differences between the slopes of the electrical parameter data on the fitting curve during the communication period, the parameter volatility of the electrical parameter data of each category at each collection time in each communication period is obtained; Based on the differences between the periodic variation patterns of the electrical parameter data, the coordinated variation factors of the electrical parameter data of each category at each collection moment in each communication period are obtained; based on the parameter volatility and the value of the coordinated variation factor, the criticality of the information at each collection moment in each communication period is obtained; Based on the criticality of information and combined with the threshold segmentation algorithm, the key acquisition moments of each communication period are obtained; the electrical parameter data of the microcomputer integrated protection device are divided into data packets; based on the number of key acquisition moments in each data packet and the time interval between key acquisition moments, the information criticality of each data packet is obtained; Based on the criticality of information and the similarity between the key collection moments of each data packet, a transmission priority factor of each data packet is obtained; and the electrical parameter data in the data packet is communicated and transmitted according to the transmission priority factor; The calculation formula of the transmission priority factor is: ; In the formula, is the transmission priority factor of the xth data packet; is the information criticality of the xth data packet; is the total number of data packets; , are sequences composed of the key collection moments of the xth and yth data packets in positive time order; is the cosine similarity; norm[] is the normalization function; The communication transmission of the electrical parameter data according to the transmission priority factor includes: The data packets to be transmitted are divided into priorities according to the descending order of the transmission priority factors of the data packets, and the electrical parameter data in the data packets to be transmitted are communicated and transmitted according to the priorities.

2. The communication method for a microcomputer integrated protection device according to claim 1, characterized in that: The method for obtaining the parameter volatility is: For each type of electrical parameter data, a sequence of electrical parameter data in each communication period is used as input, a fitting curve of each type of electrical parameter data in each communication period is obtained, and the slope of the electrical parameter data at each acquisition moment on the fitting curve is calculated as the slope of the electrical parameter data at each acquisition moment; The formula for the parameter volatility is: ; In the formula, is the parameter volatility of the electrical parameter data of the ith category at the jth collection moment in each communication period; is the absolute value of the difference between the electrical parameter data of the i-th category at the j-th collection time in the communication period and the mean value of the electrical parameter data of all previous collection times; is the cumulative result of the absolute value of the difference between the slopes of the fitting curve of the electrical parameter data of the ith category in each communication period at the jth collection time and the j+1th and j-1th collection times; Adjust parameters for the preset.

3. The communication method for a microcomputer integrated protection device according to claim 1, characterized in that: The method for obtaining the synergistic variation factor is: For each category of electrical parameter data, the sequence composed of the electrical parameter data of each communication period is used as the input of the STL sequence decomposition algorithm, and the output is the seasonal intensity of each category of electrical parameter data at each collection time in each communication period; For each collection moment in each communication time period, the absolute value of the difference between the seasonal intensity of each category of electrical parameter data and other categories of electrical parameter data is calculated, and the sum of all the absolute values ​​of the difference of each category of electrical parameter data is calculated as the coordinated change factor of each category of electrical parameter data at each collection moment in each communication time period.

4. The communication method for a microcomputer integrated protection device according to claim 1, characterized in that: The calculation formula for the criticality of the information is: ; In the formula, is the criticality of information at the jth collection moment in each communication period; , are the parameter volatility and coordinated change factor of the electrical parameter data of the ith category at the jth acquisition moment in each communication period; norm[] is the normalization function; is the total number of categories of electrical parameter data.

5. The communication method for a microcomputer integrated protection device according to claim 1, characterized in that: The method for obtaining the key acquisition moment is: The information criticality of all acquisition moments in each communication period is used as the input of the threshold segmentation algorithm, and the segmentation threshold is output. The acquisition moments with information criticality greater than or equal to the segmentation threshold in each communication period are used as the key acquisition moments in each communication period.

6. The communication method for a microcomputer integrated protection device according to claim 1, characterized in that: Each data packet contains all types of electrical parameter data at all collection moments in each communication period.

7. The communication method for a microcomputer integrated protection device according to claim 1, characterized in that: The method for obtaining the criticality of the information is: For each data packet, the ratio of the number of key acquisition moments in the data packet to the total number of all key acquisition moments in all data packets is calculated, the cumulative result of the time intervals between all key acquisition moments in the data packet is calculated, and the quotient of the ratio and the cumulative result is taken as the information criticality of each data packet.

8. A microcomputer integrated protection device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the communication method for a microcomputer integrated protection device as described in any one of claims 1 to 7 are implemented.

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