Intelligent power transmission and distribution equipment communication control system and method for multiplexing communication

Abstract

The invention discloses an intelligent power transmission and distribution equipment communication control system and method for multiplexing communication, relates to the technical field of multiplexing communication, and solves the technical problem of data communication in the communication control process of intelligent power transmission and distribution equipment. According to the invention, the collected data is transmitted through a physical line through the multiplexing communication module; wherein communication protocols adopted by the multiplexing communication module are a frequency division multiplexing communication protocol, a time division multiplexing communication protocol, a wavelength division multiplexing communication protocol, a code division multiple access communication protocol and a space division multiple access communication protocol; other modules are controlled to be in a normal working state through the control unit; circuit protection is provided through the over-current protection and rectification filtering module; data information in the multiplexing communication process is detected through the fault detection module, fault diagnosis in the multiplexing communication process is achieved by improving an abnormal flow detection model of the convolutional neural network, and the multiplexing communication capability is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of multiplexed communication and control technology, and more particularly to a multiplexed communication intelligent power transmission and distribution equipment communication control system and method. Background Art

[0002] The power transmission, distribution, and control equipment industry is closely related to the electric power industry and has a significant impact on the national economy. It is responsible for providing a wide range of electrical equipment needed for the national economy, national defense, and the electrification of people's lives. Power transmission, distribution, and control equipment form the backbone of the power transmission and distribution system, primarily referring to the equipment used to transmit and distribute electrical energy from power plants to power users.

[0003] Conventional intelligent power transmission and distribution equipment communication and control systems usually use a single data communication method and cannot implement multiplexing communication. Multiplexing technology is a technology that combines multiple low-speed channels into a high-speed channel. It can effectively improve the utilization rate of data links, so that a high-speed backbone link can simultaneously serve multiple low-speed access links. In other words, the network backbone can carry large amounts of voice and data transmission at the same time. Existing technologies have lagging data communication capabilities and low communication efficiency. Summary of the Invention

[0004] In view of the deficiencies of the above technologies, the present invention discloses a communication control system and method for intelligent power transmission and distribution equipment with multiplexed communication. By adopting multiplexed communication technology, the communication control capability of intelligent power transmission and distribution equipment is greatly improved.

[0005] The present invention adopts the following technical solutions:

[0006] A multiplex communication intelligent power transmission and distribution equipment communication control system and method, comprising:

[0007] The multiplexing communication module makes full use of the transmission media to aggregate the data of multiple users in an area, and then transmits the aggregated data through a physical line. The receiving end separates the data and distributes it to multiple users. The communication protocol adopted by the multiplexing communication module is the frequency division multiplexing communication protocol, the time division multiplexing communication protocol, the wavelength division multiplexing communication protocol, the code division multiple access communication protocol and the space division multiple access communication protocol.

[0008] Control unit, used to control other modules to be in normal working state;

[0009] Overcurrent protection and rectification and filtering modules are used to provide circuit protection;

[0010] A fault detection module is used to detect data information in the multiplexed communication process, and the fault detection module is an abnormal traffic detection model of an improved convolutional neural network;

[0011] The control unit is respectively connected to the multiplexing communication module, the overcurrent protection and rectification and filtering module and the overcurrent protection and rectification and filtering module.

[0012] As a further technical solution of the present invention, a multiplexing communication module includes a data reflection end and a data receiving end, wherein a communication protocol identification module, a communication protocol conversion module, a frequency band calculation module and a conversion coding module are arranged between the data reflection end and the data receiving end, wherein the output end of the communication protocol identification module is connected to the input end of the communication protocol conversion module, the output end of the communication protocol conversion module is connected to the input end of the frequency band calculation module, and the output end of the frequency band calculation module is connected to the output end of the conversion coding module, wherein the communication protocol identification module is used to realize the identification of multiple communication protocols, the communication protocol conversion module is used to convert multiple different communication protocols into communication protocols received by the receiving end, the frequency band calculation module is used to calculate the frequency band in the communication protocol transmission process, and the conversion coding module is used to convert data information in the communication protocol into coding information received by the receiving end.

[0013] As a further technical solution of the present invention, the communication protocol identification module includes a PIC16F877A single-chip microcomputer control system and a key input module, a protocol identification module, a display output module and a transmitting module connected to the PIC16F877A single-chip microcomputer control system.

[0014] As a further technical solution of the present invention, the communication protocol conversion module includes a heterogeneous information identification module, an operation conversion module, an OWA operator weight setting module and a conversion output module, wherein the output end of the heterogeneous information identification module is connected to the input end of the operation conversion module, the output end of the operation conversion module is connected to the input end of the OWA operator weight setting module, and the output end of the OWA operator weight setting module is connected to the input end of the conversion output module.

[0015] As a further technical solution of the present invention, the frequency band calculation module realizes frequency band calculation through a PLC controller.

[0016] As a further technical solution of the present invention, the conversion coding module includes a coding module, an acceleration module and a conversion module, wherein the output end of the coding module is connected to the input end of the acceleration module, and the output end of the acceleration module is connected to the input end of the conversion module.

[0017] As a further technical solution of the present invention, the overcurrent protection and rectification and filtering module is a bridge rectifier circuit.

[0018] The present invention also provides the following technical solutions:

[0019] A communication control method for intelligent power transmission and distribution equipment using multiplexed communication, comprising:

[0020] The multiplexing communication module utilizes the transmission media to aggregate the data of multiple users in an area, and then transmits the aggregated data through a physical line. The receiving end separates the data and distributes it to multiple users, wherein the communication protocol adopted by the multiplexing communication module is a frequency division multiplexing communication protocol, a time division multiplexing communication protocol, a wavelength division multiplexing communication protocol, a code division multiple access communication protocol, and a space division multiple access communication protocol;

[0021] Control other modules to be in normal working state through the control unit;

[0022] Provide circuit protection through overcurrent protection and rectification and filtering modules;

[0023] Detecting data information in the multiplexed communication process through a fault detection module, wherein the fault detection module is an abnormal traffic detection model of an improved convolutional neural network;

[0024] The control unit is connected to the multiplexing communication module, the overcurrent protection and rectification and filtering module, and the overcurrent protection and rectification and filtering module respectively.

[0025] As a further technical solution of the present invention, the method in which the communication protocol conversion module works is:

[0026] Step 1: Identify different communication protocols through the heterogeneous information identification module;

[0027] Assume that there are m communication protocols for heterogeneous network communication data fusion, denoted as B=(B1,B2,...,B m ), then the n converted heterogeneous network data sources are recorded as Z=(Z1, Z2,..., Z n ), set the confidence level of each heterogeneous network communication data source to q j , then the communication protocol fusion should be realized before the communication protocol conversion;

[0028] Step 2: Convert heterogeneous network communication data source information through the operation conversion module to improve the integration capability of the communication protocol;

[0029] Extract heterogeneous network communication data from the converted heterogeneous network communication data information, and convert the heterogeneous network communication data into the recognition level of the communication protocol according to the different types of the heterogeneous network communication data. The recognition level function is:

[0030] Z ji =(b ji , cji , d ji ) (1)

[0031] In formula (1), the recognition level of the jth heterogeneous network communication data source to the ith communication protocol object is set to Z ji ; The triangular fuzzy number of the recognition level is set to (b ji , c ji , d ji ), and 0≤b ji ≤c ji ≤d ji ≤1;

[0032] Step 3: Set the OWA operator weight vector through the OWA operator weight setting module;

[0033] According to the multiplexed communication data transfer and transmission capabilities and the preferences of the communication protocol, a reasonable fuzzy semantic quantization standard is selected, and the OWA operator weight vector is set. The fuzzy semantics is divided into "0 variables", "one variable", "two variables", "more than one variable" or "frequency division multiplexing", "time division multiplexing", "wavelength division multiplexing" and "code division multiplexing". The fuzzy semantic parameters are set to (0.31, 0.81), (0, 0.06), (0.6, 1.1) and (1.2, 2) respectively. According to the parameters, the fuzzy semantic quantization operator g(y) can be obtained.

[0034] According to g(y), calculate the OWA operator weight vector m describes the number of heterogeneous network communication data sources.

[0035] Step 4: Use the calculation conversion module to convert the multiplexed communication according to the confidence level q of each heterogeneous network communication data source. j and the recognition level value z ji z ji Conversion; To use the OWA weight vector, according to q j and z ji After converting each communication protocol value, arrange them according to size and use fuzzy decision method to convert them, then we have:

[0036] z ji-min =q j ×z ji (2)

[0037] z ji-max =q j +z ji -q j ×z ji (3)

[0038]

[0039] Step 5: Implement heterogeneous network communication data fusion according to the OWA operator weight vector and the converted recognition level, and calculate the final communication protocol value of each communication protocol at the same time; then:

[0040]

[0041] In the formula, the jth largest element is set to c ji ; Relation number, express the functional relationship as:

[0042]

[0043] In formula (6), P i1 and P i2 is the sampling point in the sampling current curve, P j1 and P j2 is the reference point in the reference current curve, and n is the comparison of the curve. In multiplexed communication fault detection, the steady-state reference current is a constant value. To prevent false detection, the present invention analyzes the correlation coefficient of the accumulated value of the line. The comparison value of the sampling current curve and the steady-state reference current curve is expressed as:

[0044]

[0045] In formula (4), I ref_j is the transient line current, I sam_j To sample the line current, when the current curves are different but the current change rate is the same, a high correlation will appear. The present invention introduces an adjustment factor for optimization. The adjustment factor p is expressed as:

[0046]

[0047] The system needs to obtain the precise location of the line fault point to generate a fault plan. After the fault detection is completed, the system generates various random combinations of fault locations and fault resistances, and then calculates the transient line current and the maximum transient current I during the multiplex communication process. cdli_max And the maximum sampling current I sam_max , taking the moment when the fault is detected as the reference moment, aligning the sampling current and the calculated transient current at each moment, and judging I cdli_max and I sam_max The relationship between cdli_max Greater than I sam_max , the calculated current curve offset, and then the PEARSON method is used to analyze the correlation between the calculated transient currents. When the correlation is higher than the set threshold, the fault location can be terminated.

[0048] The present invention has the following positive and beneficial effects:

[0049] The present invention uses a multiplexing communication module to transmit the collected data through a physical line, and the receiving end separates the data and distributes it to multiple users. The communication protocol adopted by the multiplexing communication module is a frequency division multiplexing communication protocol, a time division multiplexing communication protocol, a wavelength division multiplexing communication protocol, a code division multiple access communication protocol and a space division multiple access communication protocol; the control unit controls other modules to be in normal working state; the overcurrent protection and rectification and filtering modules provide circuit protection; the fault detection module detects data information in the multiplexing communication process, and the abnormal flow detection model of the improved convolutional neural network is used to realize fault diagnosis in the multiplexing communication process. The present invention greatly improves the multiplexing communication capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0051] Figure 1 This is a schematic diagram of the working process of the communication protocol conversion module of the present invention;

[0052] Figure 2 Schematic diagram of the overcurrent protection and rectification and filtering circuit of the present invention;

[0053] Figure 3 The figure is a flow chart of the fault detection and fault location method of the present invention. DETAILED DESCRIPTION

[0054] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0055] like Figure 1-Figure 3 As shown, a multiplex communication intelligent power transmission and distribution equipment communication control system includes:

[0056] The multiplexing communication module makes full use of the transmission media to aggregate the data of multiple users in an area, and then transmits the aggregated data through a physical line. The receiving end separates the data and distributes it to multiple users. The communication protocol adopted by the multiplexing communication module is the frequency division multiplexing communication protocol, the time division multiplexing communication protocol, the wavelength division multiplexing communication protocol, the code division multiple access communication protocol and the space division multiple access communication protocol.

[0057] Control unit, used to control other modules to be in normal working state;

[0058] Overcurrent protection and rectification and filtering modules are used to provide circuit protection;

[0059] A fault detection module is used to detect data information in the multiplexed communication process, and the fault detection module is an abnormal traffic detection model of an improved convolutional neural network;

[0060] The control unit is respectively connected to the multiplexing communication module, the overcurrent protection and rectification and filtering module and the overcurrent protection and rectification and filtering module.

[0061] In the above embodiment, the multiplexing communication module includes a data reflection end and a data receiving end, wherein a communication protocol identification module, a communication protocol conversion module, a frequency band calculation module and a conversion coding module are arranged between the data reflection end and the data receiving end, wherein the output end of the communication protocol identification module is connected to the input end of the communication protocol conversion module, the output end of the communication protocol conversion module is connected to the input end of the frequency band calculation module, and the output end of the frequency band calculation module is connected to the output end of the conversion coding module, wherein the communication protocol identification module is used to realize the identification of multiple communication protocols, the communication protocol conversion module is used to convert multiple different communication protocols into communication protocols received by the receiving end, the frequency band calculation module is used to calculate the frequency band in the communication protocol transmission process, and the conversion coding module is used to convert data information in the communication protocol into coding information received by the receiving end.

[0062] In a specific embodiment, before sending the data signal sequence of the object, the multiplexing communication module configures a signal sequence that is time-shifted according to a predetermined offset value for each transmission stream as a channel estimation signal sequence for a zero-correlation channel estimation signal sequence (basic channel estimation signal sequence) with a predetermined length, and generates each transmission stream in the BB (baseband) frequency band, wherein each transmission stream is configured with a CP (cyclic prefix) of a predetermined length in the first half of the channel estimation signal sequence; after converting the signal sequence of the BB band of all the generated transmission streams to the RF (radio frequency) band or to the IF (intermediate frequency) band, the frequency is converted to the RF band; and the multiple transmission streams after the frequency conversion are converted into signals of multiple OAM modes of different orders, and spatially multiplexed and transmitted from the UCA.

[0063] In the present invention, the communication protocol identification module includes a PIC16F877A single-chip microcomputer control system and a key input module, a protocol identification module, a display output module and a transmitting module connected to the PIC16F877A single-chip microcomputer control system.

[0064] In this specific embodiment, the system involves a large amount of programming, requiring a sufficient Flash program memory. An EEPROM data memory module is used to store transmitted and received text messages, ensuring that the contents are not lost during power outages. Receive decoding requires pulse width capture and comparison functions, utilizing a capture / compare / pulse width modulation (CCP) module. Independent timers are required for transmission, reception, and clock functions, requiring at least three timers. Based on design requirements, a Microchip PIC16F877A chip is used as the system's main controller. This circuit primarily consists of a main control chip, a crystal oscillator circuit, and an in-circuit emulation interface, enabling information exchange for multiplexed communications. In the specific design, the MCLR, RB6, and RB7 interfaces are used as the in-circuit emulation interface. The physical layer, at the lowest level, is responsible for transmitting and receiving bit streams. Issues addressed by the physical layer include how to represent "1" and "0," how to eliminate interference, and whether transmission occurs simultaneously in both directions. The present invention uses a 433MHz high-frequency transmitting module and a receiving module as a wireless communication bridge. The fixed frequency limits data transmission to only one direction at a time, so data transmission in two directions can only be completed when it occurs alternately.

[0065] In the present invention, the communication protocol conversion module includes a heterogeneous information identification module, an operation conversion module, an OWA operator weight setting module and a conversion output module, wherein the output end of the heterogeneous information identification module is connected to the input end of the operation conversion module, the output end of the operation conversion module is connected to the input end of the OWA operator weight setting module, and the output end of the OWA operator weight setting module is connected to the input end of the conversion output module.

[0066] In multiplexed communications, in the above-mentioned embodiments, frequency division multiplexing (FDM) divides a circuit or space's frequency bandwidth into multiple frequency bands and allocates them to multiple users. Data from each user terminal is transmitted via its assigned sub-channel. This is primarily used in telephone and cable television systems. Time division multiplexing (TDM) divides transmission time, transmitting different signals at different times. It includes two methods: synchronous TDM and asynchronous TDM. Wavelength division multiplexing (WDM) utilizes frequency division multiplexing for optical signals. This allows a single optical fiber to simultaneously transmit multiple optical signals with closely spaced frequencies. Code division multiplexing (CDM) allows each user to communicate using the same frequency band at the same time, a method of sharing channels. This prevents interference between different communication channels and provides strong anti-interference capabilities. In these multiplexed communications, ambiguity matching is performed based on the protocols of the different data messages.

[0067] In the present invention, the frequency band calculation module realizes frequency band calculation through a PLC controller.

[0068] In the present invention, the conversion encoding module includes an encoding module, an acceleration module and a conversion module, wherein the output end of the encoding module is connected to the input end of the acceleration module, and the output end of the acceleration module is connected to the input end of the conversion module.

[0069] In a specific embodiment, for example, the encoding module improves the communication code recognition capability by encoding the communication protocol, the acceleration module improves the communication acceleration capability by adding an acceleration chip, and the conversion module improves the communication acceleration capability by converting different formats or communication protocols.

[0070] In the present invention, the overcurrent protection and rectification and filtering module is a bridge rectifier circuit.

[0071] like Figure 2 As shown, the energy-collecting magnetic core induces an alternating voltage from the circuit, while the online monitoring equipment requires a direct current voltage. Therefore, it is necessary to first process the alternating voltage through a rectifier and filter circuit to convert the alternating voltage into a relatively stable direct current voltage. The present invention uses a bridge rectifier circuit, which has a high output voltage and a small ripple coefficient. Considering that the secondary output voltage is high and the secondary current is not large, a Schottky diode with a small forward conduction voltage is selected here. Its reverse withstand voltage is 200V and the forward current can reach 20A, which can fully meet the design requirements. The filtering part adopts an LCπ-type filter circuit, which has a high output voltage smoothness and small fluctuations. To filter out high-frequency voltage interference, two 470pF ceramic capacitors C1 and C2 are connected in parallel at both ends of the circuit. C3, C4, C5, and C6 are electrolytic capacitors with a withstand voltage of 50V, and resistors R1, R2, R3, and R4 of the same resistance are connected in parallel at both ends of the capacitor to evenly distribute the voltage across the two capacitors.

[0072] A communication control method for intelligent power transmission and distribution equipment using multiplexed communication, comprising:

[0073] The multiplexing communication module utilizes the transmission media to aggregate the data of multiple users in an area, and then transmits the aggregated data through a physical line. The receiving end separates the data and distributes it to multiple users, wherein the communication protocol adopted by the multiplexing communication module is a frequency division multiplexing communication protocol, a time division multiplexing communication protocol, a wavelength division multiplexing communication protocol, a code division multiple access communication protocol, and a space division multiple access communication protocol;

[0074] Control other modules to be in normal working state through the control unit;

[0075] Provide circuit protection through overcurrent protection and rectification and filtering modules;

[0076] A fault detection module is used to detect data information in the multiplexed communication process, and the fault detection module is an abnormal traffic detection model of an improved convolutional neural network;

[0077] The control unit is respectively connected to the multiplexing communication module, the overcurrent protection and rectification and filtering module and the overcurrent protection and rectification and filtering module.

[0078] In the present invention, the communication protocol conversion module works as follows:

[0079] Step 1: Identify different communication protocols through the heterogeneous information identification module;

[0080] Assume that there are m communication protocols for heterogeneous network communication data fusion, which are recorded as B = (B1, B2, ..., B m ), then the n converted heterogeneous network data sources are recorded as Z = (Z1, Z2, ..., Z n ), set the confidence level of each heterogeneous network communication data source to q j , then the communication protocol fusion should be realized before the communication protocol conversion;

[0081] Step 2: Convert heterogeneous network communication data source information through the operation conversion module to improve the integration capability of the communication protocol;

[0082] Extract heterogeneous network communication data from the converted heterogeneous network communication data information, and convert the heterogeneous network communication data into the recognition level of the communication protocol according to the different types of the heterogeneous network communication data. The recognition level function is:

[0083] Z ji =(b ji , c ji , d ji ) (1)

[0084] In formula (1), the recognition level of the jth heterogeneous network communication data source to the ith communication protocol object is set to Z ji ; The triangular fuzzy number of the recognition level is set to (b ji , c ji , d ji )At the same time 0≤b ji ≤c ji ≤d ji ≤1;

[0085] Step 3: Set the OWA operator weight vector through the OWA operator weight setting module;

[0086] According to the multiplexed communication data transfer and transmission capabilities and the preferences of the communication protocol, a reasonable fuzzy semantic quantization standard is selected, and the OWA operator weight vector is set. The fuzzy semantics is divided into "0 variables", "one variable", "two variables", "more than one variable" or "frequency division multiplexing", "time division multiplexing", "wavelength division multiplexing" and "code division multiplexing". The fuzzy semantic parameters are set to (0.31, 0.81), (0, 0.06), (0.6, 1.1) and (1.2, 2) respectively. According to the parameters, the fuzzy semantic quantization operator g(y) can be obtained.

[0087] The data link layer uses the services provided by the physical layer and transforms a simple data link into a reliable one by adding error handling mechanisms. This is then provided to the application layer. The data link layer transmits data in codewords, each consisting of data and necessary checksum information. This is defined here as the Wireless Transmission Protocol (WTP).

[0088] According to g(y), calculate the OWA operator weight vector m describes the number of heterogeneous network communication data sources.

[0089] Step 4: Use the calculation conversion module to convert the multiplexed communication according to the confidence level q of each heterogeneous network communication data source. j and the recognition level value z ji z ji Conversion; To use the OWA weight vector, according to q j and z ji After converting each communication protocol value, arrange them according to size and use fuzzy decision method to convert them, then we have:

[0090] z ji-min =q j ×z ji (2)

[0091] z ji-max =q j +z ji -q j ×z ji (3)

[0092]

[0093] Step 5: Implement heterogeneous network communication data fusion according to the OWA operator weight vector and the converted recognition level, and calculate the final communication protocol value of each communication protocol at the same time; then:

[0094]

[0095] In the formula, the jth largest element is set to c ji ;

[0096] Step 6: Implement the converged communication protocol according to the actual problem and the size of the communication protocol value to complete the multiplexed communication heterogeneous network communication data conversion and calculation.

[0097] In the present invention, the abnormal traffic detection model of the improved convolutional neural network uses the PEARSON method to compare the sampled current with the steady-state reference current, and then calculates the data power in the multiplexed communication process;

[0098] In the present invention, the PEARSON method expresses the functional relationship as follows by solving the correlation coefficient between the voltage and the current in the multiplexed communication process:

[0099]

[0100] In formula (6), P i1 and P i2 is the sampling point in the sampling current curve, P j1 and P j2 is the reference point in the reference current curve, and n is the comparison of the curve. In multiplexed communication fault detection, the steady-state reference current is a constant value. To prevent the occurrence of false detection, the present invention analyzes the correlation coefficient of the accumulated value of the line. The comparison value of the sampling current curve and the steady-state reference current curve is expressed as:

[0101]

[0102] In formula (4), I ref_j is the transient line current, I sam_j To sample the line current, when the current curves are different but the current change rate is the same, a high correlation will appear. The present invention introduces an adjustment factor for optimization. The adjustment factor p is expressed as:

[0103]

[0104] During fault detection, monitoring terminals on multiplexed transmission and distribution lines sample and store the fault current. A fixed time window (3ms) is selected as the line current reference. The correlation between the sampled current and the steady-state reference current is compared at a 2kHz frequency. If the correlation between the positive and negative fault currents falls below a threshold and the sum of the currents at the two poles is non-zero, a polarity-to-ground short circuit fault is detected.

[0105] The system needs to obtain the precise location of the line fault point to generate a fault plan. After the fault detection is completed, the system generates various random combinations of fault locations and fault resistances, and then calculates the transient line current and the maximum transient current I during the multiplex communication process. cdli_max And the maximum sampling current I sam_max , taking the moment when the fault is detected as the reference moment, aligning the sampling current and the calculated transient current at each moment, and judging I cdli_max and I sam_max The relationship between cdli_max Greater than I sam_max , the calculated current curve offset, and then the PEARSON method is used to analyze the correlation between the calculated transient currents. When the correlation is higher than the set threshold, the fault location can be terminated.

[0106] In a further embodiment, line fault detection and location in the process of multiplexed communication are realized based on the improved PEARSON method. During the operation of the abnormal traffic detection model in the circuit during multiplexed communication, the data can also be preprocessed accordingly. When extracting the characteristic vector of the traffic, characteristic vectors of different orders of magnitude will appear, which will lead to inaccurate classification results. The above data model maps all characteristic vectors to between [0, 1]. Then training is performed. The final prediction result is compared with the true value to calculate the loss value, and the parameters are continuously updated until the model converges. Then testing is performed. A detection model is obtained through step 2, and the performance of the model is verified using a test set. If the performance is better, the training can be stopped. If the performance is not good enough, the training is continued. By improving the convolutional neural network model to detect the traffic of the data platform during multiplexed communication, the probability of the platform being attacked can be greatly reduced.

[0107] like Figure 3 As shown, when the system generates multiplexed communication information online, the fault plan needs to rely on an accurate fault location method to predict the specific location of the multiplexed communication fault on the fault line, so as to isolate and repair the multiplexed communication fault point. Since there are many multiplexed communication connection equipment units and different lines are coupled with each other, the direct use of the multiplexed communication flexible direct current transmission fault detection method may misjudge a short circuit fault on a non-fault line. Therefore, the present invention requires a fault location method with low sampling frequency requirements and high positioning accuracy. The present invention proposes a method for detecting and locating line faults based on an improved PEARSON method. The improved PEARSON method can effectively avoid misjudgments caused by different current curves.

[0108] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these specific embodiments are merely illustrative, and that those skilled in the art may omit, substitute, and modify the details of the above-described methods and inventions without departing from the principles and spirit of the present invention. For example, combining the above-described method steps to perform substantially the same functions in substantially the same manner to achieve substantially the same results falls within the scope of the present invention. Accordingly, the scope of the present invention is limited solely by the appended claims.

Claims

1. A multiplex communication intelligent power transmission and distribution equipment communication control system, characterized by: include: The multiplexing communication module makes full use of the transmission media to aggregate the data of multiple users in an area, and then transmits the aggregated data through a physical line. The receiving end separates the data and distributes it to multiple users. The communication protocol adopted by the multiplexing communication module is the frequency division multiplexing communication protocol, the time division multiplexing communication protocol, the wavelength division multiplexing communication protocol, the code division multiple access communication protocol and the space division multiple access communication protocol. Control unit, used to control other modules to be in normal working state; Overcurrent protection and rectification and filtering modules are used to provide circuit protection; A fault detection module is used to detect data information in the multiplexed communication process, and the fault detection module is an abnormal traffic detection model of an improved convolutional neural network; The control unit is respectively connected to the multiplexing communication module, the overcurrent protection and rectification and filtering module and the overcurrent protection and rectification and filtering module.

2. The intelligent power transmission and distribution equipment communication control system with multiplexed communication according to claim 1, characterized in that: The multiplexing communication module includes a data reflection end and a data receiving end, wherein a communication protocol identification module, a communication protocol conversion module, a frequency band calculation module and a conversion coding module are arranged between the data reflection end and the data receiving end, wherein the output end of the communication protocol identification module is connected to the input end of the communication protocol conversion module, the output end of the communication protocol conversion module is connected to the input end of the frequency band calculation module, and the output end of the frequency band calculation module is connected to the output end of the conversion coding module, wherein the communication protocol identification module is used to realize the identification of multiple communication protocols, the communication protocol conversion module is used to convert multiple different communication protocols into communication protocols received by the receiving end, the frequency band calculation module is used to calculate the frequency band in the communication protocol transmission process, and the conversion coding module is used to convert data information in the communication protocol into coding information received by the receiving end.

3. The intelligent power transmission and distribution equipment communication control system with multiplexed communication according to claim 1, characterized in that: The communication protocol identification module comprises a PIC16F877A single-chip microcomputer control system and a key input module, a protocol identification module, a display output module and a transmitting module connected with the PIC16F877A single-chip microcomputer control system.

4. The intelligent power transmission and distribution equipment communication control system with multiplexed communication according to claim 1, characterized in that: The communication protocol conversion module includes a heterogeneous information identification module, an operation conversion module, an OWA operator weight setting module and a conversion output module, wherein the output end of the heterogeneous information identification module is connected to the input end of the operation conversion module, the output end of the operation conversion module is connected to the input end of the OWA operator weight setting module, and the output end of the OWA operator weight setting module is connected to the input end of the conversion output module.

5. The intelligent power transmission and distribution equipment communication control system with multiplexed communication according to claim 1, characterized in that: The frequency band calculation module realizes frequency band calculation through the PLC controller.

6. The intelligent power transmission and distribution equipment communication control system with multiplexed communication according to claim 1, characterized in that: The conversion coding module includes a coding module, an acceleration module and a conversion module, wherein the output end of the coding module is connected to the input end of the acceleration module, and the output end of the acceleration module is connected to the input end of the conversion module.

7. The intelligent power transmission and distribution equipment communication control system with multiplexed communication according to claim 1, characterized in that: The overcurrent protection and rectification and filtering module is a bridge rectifier circuit.

8. A communication control method for intelligent power transmission and distribution equipment with multiplexed communication, characterized by: include: The multiplexing communication module utilizes the transmission media to aggregate the data of multiple users in an area, and then transmits the aggregated data through a physical line. The receiving end separates the data and distributes it to multiple users, wherein the communication protocol adopted by the multiplexing communication module is a frequency division multiplexing communication protocol, a time division multiplexing communication protocol, a wavelength division multiplexing communication protocol, a code division multiple access communication protocol, and a space division multiple access communication protocol; Control other modules to be in normal working state through the control unit; Provide circuit protection through overcurrent protection and rectification and filtering modules; Detecting data information in the multiplexed communication process through a fault detection module, wherein the fault detection module is an abnormal traffic detection model of an improved convolutional neural network; The control unit is connected to the multiplexing communication module, the overcurrent protection and rectification and filtering module, and the overcurrent protection and rectification and filtering module respectively.

9. The intelligent power transmission and distribution equipment communication control system with multiplexed communication according to claim 8, characterized in that: The method in which the communication protocol conversion module works is: Step 1: Identify different communication protocols through the heterogeneous information identification module; Assume that there are m communication protocols for heterogeneous network communication data fusion, which are recorded as B = (B1, B2, ..., B m ), then the n converted heterogeneous network data sources are recorded as Z = (Z1, Z2, ..., Z n ), set the confidence level of each heterogeneous network communication data source to q j , then the communication protocol fusion should be realized before the communication protocol conversion; Step 2: Convert heterogeneous network communication data source information through the operation conversion module to improve the integration capability of the communication protocol; Extract heterogeneous network communication data from the converted heterogeneous network communication data information, and convert the heterogeneous network communication data into the recognition level of the communication protocol according to the different types of the heterogeneous network communication data. The recognition level function is: Z ji =(b ji ,c ji ,d ji ) (1) In formula (1), the recognition level of the jth heterogeneous network communication data source to the ith communication protocol object is set to Z ji ; The triangular fuzzy number of the recognition level is set to (b ji , c ji , d ji ), and 0≤b ji ≤c ji ≤d ji ≤1; Step 3: Set the OWA operator weight vector through the OWA operator weight setting module; According to the data transfer and transmission capabilities of multiplexed communication and the preferences of communication protocol providers, reasonable fuzzy semantic quantization standards are selected and the OWA operator weight vector is set. Fuzzy semantics are divided into "0 variables", "one variable", "two variables", "more than one variable" or into "frequency division multiplexing", "time division multiplexing", "wavelength division multiplexing" and "code division multiplexing". The fuzzy semantic parameters are set to (0.31, 0.81), (0, 0.06), (0.6, 1.1) and (1.2, 2) respectively. According to the parameters, the fuzzy semantic quantization operator g(y) can be obtained. According to g(y), calculate the OWA operator weight vector m describes the number of heterogeneous network communication data sources. Step 4: Use the calculation conversion module to convert the multiplexed communication according to the confidence level q of each heterogeneous network communication data source. j and the recognition level value z ji z ji Conversion; To use the OWA weight vector, according to q j and z ji After converting each communication protocol value, arrange them according to size and use fuzzy decision method to convert them, then we have: z ji-min =q j ×z ji (2) z ji-max =q j +z ji -q j ×z ji (3) Step 5: Implement heterogeneous network communication data fusion according to the OWA operator weight vector and the converted recognition level, and calculate the final communication protocol value of each communication protocol at the same time; then: In the formula, the jth largest element is set to c ji ; Step 6: Implement the converged communication protocol according to the actual problem and the size of the communication protocol value to complete the multiplexed communication heterogeneous network communication data conversion and calculation.

10. The intelligent power transmission and distribution equipment communication control system with multiplexed communication according to claim 8, characterized in that: The improved convolutional neural network abnormal traffic detection model uses the PEARSON method to compare the sampled current with the steady-state reference current, and then calculates the data power in the multiplexed communication process; The PEARSON method expresses the functional relationship as follows by solving the correlation coefficient between voltage and current in the multiplexed communication process: In formula (6), P i1 and P i2 is the sampling point in the sampling current curve, P j1 and P j2 is the reference point in the reference current curve, and n is the comparison of the curve. In multiplexed communication fault detection, the steady-state reference current is a constant value. To prevent the occurrence of false detection, the present invention analyzes the correlation coefficient of the accumulated value of the line. The comparison value of the sampling current curve and the steady-state reference current curve is expressed as: In formula (4), I ref_j is the transient line current, I sam_j To sample the line current, when the current curves are different but the current change rate is the same, a high correlation will appear. The present invention introduces an adjustment factor for optimization. The adjustment factor p is expressed as: The system needs to obtain the precise location of the line fault point to generate a fault plan. After the fault detection is completed, the system generates various random combinations of fault locations and fault resistances, and then calculates the transient line current and the maximum transient current I during the multiplex communication process. cdli_max And the maximum sampling current I sam_max , taking the moment when the fault is detected as the reference moment, aligning the sampling current and the calculated transient current at each moment, and judging I cdli_max and I sam_max The relationship between cdli_max Greater than I sam_max , the calculated current curve offset, and then the PEARSON method is used to analyze the correlation between the calculated transient currents. When the correlation is higher than the set threshold, the fault location can be terminated.

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