Intelligent detection system and method for secondary equipment of flexible direct-current station

Abstract

The invention provides an intelligent detection system and method for secondary equipment of a flexible direct-current station, and belongs to the technical field of power system protection. The system comprises an acquisition unit and a management unit, the acquisition unit comprises an analysis processing subunit and a logic control subunit, and the analysis processing subunit is configured to acquire data messages of the flexible direct station secondary equipment and upload the data messages to the management unit; the management unit is configured to receive the data message, generate an extended data message based on the data message, and issue the extended data message to the logic control subunit; and the logic control subunit is configured to receive the extended data message and send the extended data message and the data message to a detection unit for fault detection. The intelligent detection system provided by the invention can improve the fault analysis and detection efficiency.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of power system protection, and specifically relates to an intelligent detection system and method for secondary equipment of a flexible direct current station, a flexible direct current station, a computer-readable storage medium, and a computer program product. Background Art

[0002] At present, all power grid companies are conducting research on flexible power transmission. In the existing technology, the flexible DC converter station can only protect the export transmission by modifying the internal program or setting the number on the protection device. However, repeated and multiple program modifications have brought huge safety hazards and challenges to normal production. At the same time, when the flexible DC protection device is replaced or the program is upgraded, the converter station can only perform simple inspections such as sampling function and alarm function. As a result, the use of the solution in the existing technology leads to problems such as inadequate maintenance and inadequate investigation of safety hazards, and the detection means in the existing technology are inefficient and intelligent.

[0003] Compared with AC protection, flexible DC protection has more protection types, more complex functions, and involves more devices. Therefore, the fault analysis of flexible DC is more complicated. At present, it is very difficult for maintenance personnel and feasibility study personnel to analyze and judge the fault types of flexible DC. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art and to provide an intelligent detection system, method, flexible direct current station, computer-readable storage medium and computer program product for secondary equipment of a flexible direct current station, which can accurately and efficiently judge the fault type of the flexible direct current.

[0005] In order to achieve the above objectives, in a first aspect, an embodiment of the present disclosure provides an intelligent detection system for secondary equipment of a flexible direct current station, the system comprising a collection unit and a management unit, the collection unit comprising an analysis and processing subunit and a logic control subunit, wherein:

[0006] The analysis and processing subunit is configured to collect data messages of the secondary equipment of the flexible direct current station and upload the data messages to the management unit;

[0007] The management unit is configured to receive the data message, generate an extended data message based on the data message, and send the extended data message to the logic control subunit;

[0008] The logic control subunit is configured to receive the extended data message, and send the extended data message and the data message to the detection unit for fault detection.

[0009] In some embodiments, the acquisition unit further includes a digital board, and the management unit includes an external communication subunit and a logic processing subunit, wherein:

[0010] The external communication subunit is configured to control the working state of the serial input optical port of the digital board based on a preset instruction and according to the working mode of the secondary device of the flexible direct current station, wherein the working mode of the secondary device of the flexible direct current station includes a normal working mode;

[0011] The analysis and processing subunit is specifically configured to read the working state of the serial input optical port of the digital board, and according to the working state of the serial input optical port of the digital board, when the secondary device of the flexible direct current station is in a normal working mode, collect the data message of the secondary device of the flexible direct current station, and upload the data message to the logic processing subunit;

[0012] The logic processing subunit is configured to receive the data message, generate an extended data message based on the data message, and send the extended data message to the logic control subunit.

[0013] In some embodiments, the working mode of the secondary equipment of the flexible direct current station further includes a shutdown detection mode.

[0014] The logic control subunit is specifically configured to read the working status of the serial input optical port of the digital board, and based on the working status of the serial input optical port of the digital board, when the secondary equipment of the flexible direct current station is in the shutdown detection mode, receive the extended data message sent by the logic processing subunit, and send the extended data message and the data message to the detection unit for fault detection.

[0015] In some embodiments, the management unit further includes:

[0016] A configuration management subunit is configured to perform configuration mapping on the data message and the extended data message and the data channel to obtain a configuration mapping relationship;

[0017] The logic processing subunit is specifically configured to send the extended data message to the logic control subunit according to the configuration mapping relationship;

[0018] The logic control subunit is specifically configured to send the extended data message and the data message to the detection unit according to the configuration mapping relationship to perform fault detection.

[0019] In some embodiments, the analysis and processing subunit is specifically configured to collect the original data packets of the flexible direct current station secondary equipment, classify and process the original data to obtain the data packets, and send the data packets to the logic processing subunit; wherein the data packets are data of the same fault type.

[0020] In some embodiments, the logic processing sub-unit is specifically configured to identify the fault type of the flexible direct current station secondary equipment based on the data message through a neural network model; and according to the fault type of the flexible direct current station secondary equipment, generate a new fault waveform generated by the flexible direct current station secondary equipment when the fault type occurs, obtain the extended data message, and send the extended data message to the logic control sub-unit.

[0021] In some embodiments, the neural network model is obtained through neural network training based on fault waveforms simulated by fault tests and fault simulations.

[0022] In some embodiments, the acquisition unit further includes:

[0023] The data storage subunit is configured to store the data messages of the secondary equipment of the flexible direct current station collected by the analysis and processing subunit.

[0024] In a second aspect, an embodiment of the present disclosure provides an intelligent detection method for a secondary device of a flexible direct current station, the method being applied to an intelligent detection system, the system comprising a collection unit and a management unit, the collection unit comprising an analysis and processing subunit and a logic control subunit, the method comprising:

[0025] The analysis and processing subunit collects data messages of the secondary equipment of the flexible direct current station and uploads the data messages to the management unit;

[0026] The management unit receives the data message, generates an extended data message based on the data message, and sends the extended data message to the logic control subunit;

[0027] The logic control subunit receives the extended data message sent by the management unit, and sends the extended data message and the data message to the detection unit to perform fault detection.

[0028] In some embodiments, the acquisition unit further includes a digital board, the management unit includes an external communication subunit and a logic processing subunit, and the method further includes:

[0029] The external communication subunit controls the working state of the serial optical port of the digital board based on the preset instruction and the working mode of the secondary equipment of the flexible direct current station, wherein the working mode of the secondary equipment of the flexible direct current station includes a normal working mode; wherein,

[0030] The analysis and processing subunit reads the working state of the serial input optical port of the digital board, and according to the working state of the serial input optical port of the digital board, when the secondary device of the flexible direct current station is in the normal working mode, collects the data message of the secondary device of the flexible direct current station, and uploads the data message to the logic processing subunit;

[0031] The logic control subunit reads the working status of the serial input optical port of the digital board, and based on the working status of the serial input optical port of the digital board, when the secondary equipment of the flexible direct current station is in the shutdown detection mode, receives the extended data message sent by the logic processing subunit, and sends the extended data message and the data message to the detection unit for fault detection.

[0032] In some embodiments, the analysis and processing subunit collects data messages of the secondary equipment of the flexible direct current station and uploads the data messages to the management unit, specifically including:

[0033] The analysis and processing subunit collects the original data message of the secondary equipment of the flexible direct current station, and classifies and processes the original data to obtain the data message, wherein the data message is data of the same fault type;

[0034] The data message is uploaded to the logic processing subunit.

[0035] In some embodiments, the management unit generates an extended data message based on the data message, and sends the extended data message to the acquisition unit, including:

[0036] The logic processing subunit identifies the fault type of the secondary equipment of the flexible direct current station based on the data message through a neural network model;

[0037] According to the fault type of the flexible direct current station secondary equipment, a new fault waveform generated by the flexible direct current station secondary equipment when the fault type occurs is generated, the extended data message is obtained, and the extended data is sent to the logic control subunit.

[0038] In a third aspect, an embodiment of the present disclosure provides a flexible direct current station, comprising an intelligent detection system as described in any one of the above-mentioned first aspects.

[0039] In a fourth aspect, the present disclosure further provides a computer-readable storage medium storing a computer program for executing the computing method of the first aspect.

[0040] In a fifth aspect, the present disclosure further provides a computer program product, including a computer program / instruction, which implements the steps of the computing method of the first aspect when the computer program / instruction is executed by a processor.

[0041] The intelligent detection system for the secondary equipment of the flexible direct current station provided by the embodiment of the present disclosure, by setting an analysis and processing subunit and a logic control subunit in the acquisition unit, enables the acquisition unit to not only serve as a data sample library, and record data by collecting data messages of the primary equipment of the flexible direct current station, but also to generate detection data as a detection device through interaction with the management unit, and send the newly generated detection data (extended data) together with the original collected data message to the corresponding unit for fault detection, so that the fault analysis of the flexible direct current station is simpler, and there is no need for maintenance personnel to analyze the fault type, thereby reducing labor costs and improving the efficiency of fault analysis. At the same time, the intelligent detection system for the secondary equipment of the flexible direct current station provided by the present disclosure has a simple structure, and can record data messages of the primary equipment according to actual needs, or generate detection data according to the collected data messages of the primary equipment for fault detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 A structural diagram of an intelligent detection system for secondary equipment of a flexible direct current station provided in an embodiment of the present disclosure;

[0044] Figure 2 A structural diagram of a digital board provided in an embodiment of the present disclosure;

[0045] Figure 3 A structural diagram of a flexible direct current station provided in an embodiment of the present disclosure;

[0046] Figure 4 A flow chart of an intelligent detection method for secondary equipment of a flexible direct current station provided in an embodiment of the present disclosure;

[0047] Figure 5 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail and completely in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0049] In a first aspect, an embodiment of the present disclosure provides an intelligent detection system for secondary equipment of a flexible direct current station, and the intelligent detection system is applied to the secondary equipment of a flexible direct current station.

[0050] Among them, the flexible direct current station, namely the flexible direct current transmission converter station, is a key component of the flexible direct current transmission system. The flexible direct current station includes primary equipment and secondary equipment, among which the primary equipment is the equipment directly involved in the production, transmission, distribution and conversion of electric energy. In the flexible direct current station, the primary equipment mainly includes converter valves, converter transformers, GIS (gas insulated switchgear), DC wall bushings, DC transfer switches, DC disconnectors, lightning arresters, capacitors, reactors, resistors, current measuring devices, voltage measuring devices, etc. These devices constitute the main framework of the flexible direct current station and are responsible for the actual transmission and distribution of electric energy.

[0051] Secondary equipment is used to monitor, control, measure, protect and adjust the operation of primary equipment. In flexible direct current stations, secondary equipment includes DC control and protection, power grid automation, etc. These devices do not directly participate in the transmission and conversion of electric energy, but ensure the normal operation of primary equipment and the safety of the entire power system through control and protection functions.

[0052] The primary equipment and secondary equipment are interdependent and work together in the flexible direct current station. The primary equipment is the foundation of the power system, responsible for the transmission and distribution of electric energy, and has strong physical properties and current carrying capacity. The secondary equipment is the guardian of the power system. Although they are not directly involved in the transmission and conversion of electric energy, they ensure the stable operation and safety of the entire system through monitoring and control functions. In the design and operation of the flexible direct current station, the selection and configuration of the primary and secondary equipment need to be considered at the same time to ensure the overall performance and safety of the power system.

[0053] Figure 1 FIG. 1 is a structural diagram of an intelligent detection system 100 for a secondary device of a flexible direct current station provided in an embodiment of the present disclosure. Figure 1 As shown, the intelligent detection system 100 of the secondary equipment of the flexible direct current station includes a collection unit 10 and a management unit 20 , wherein the collection unit 10 includes an analysis and processing subunit 11 and a logic control subunit 12 .

[0054] The analysis and processing subunit 11 is configured to collect data messages of the secondary equipment of the flexible direct current station and upload the data messages to the management unit 20. The data messages of the secondary equipment of the flexible direct current station collected by the analysis and processing subunit 11 include analog quantities and switch quantities of the secondary equipment of the flexible direct current station. The analog quantity includes amplitude, phase, frequency, duration, etc., and the switch quantity includes state value and duration, etc.

[0055] The management unit 20 is configured to receive the data message, generate an extended data message based on the data message, and send the extended data message to the logic control subunit 12. Specifically, the management unit 20 can actively learn the received data message, thereby generating a new data message matching the received data message as the extended data message. Matching the received data message means that the fault type corresponding to the received data message is the same.

[0056] In some embodiments, the analysis and processing subunit 11 is also configured to process the collected data message of the secondary device of the flexible direct current station, including converting the data message into a recording file, or preprocessing the data message (such as denoising the data message, or classifying and arranging the data message according to preset rules, etc.), etc., which is not limited in the present disclosure. Such a setting can improve the learning ability and learning efficiency of the management unit 20, so that the new data message generated by the management unit 20 is more matched with the data message collected by the collection unit 10, so as to be used for subsequent fault detection and improve the efficiency of subsequent fault detection.

[0057] In some embodiments, the management unit 20 is further configured to receive data packets sent by the analysis and processing subunit 11 in the acquisition unit 10, and perform intelligent analysis, visualization and other functions on the data packets.

[0058] The logic control subunit 12 is configured to receive the extended data message, and send the extended data message and the data message to the detection unit for fault detection. The detection unit can be a unit independent of the intelligent detection system 100, or a subunit inside the intelligent detection system 100, and the present disclosure does not limit this. The detection unit is configured to perform fault detection on the secondary equipment of the flexible direct current station based on the data message and / or the extended data message.

[0059] The intelligent detection system for the secondary equipment of the flexible direct current station provided by the embodiment of the present disclosure, by setting an analysis and processing subunit and a logic control subunit in the acquisition unit, enables the acquisition unit to not only serve as a data sample library, but also to cache and record the data packets of the collected secondary equipment of the flexible direct current station; the acquisition unit can also serve as a detection device, and through interaction with the management unit, the newly generated detection data (extended data) of the management unit and the data packets originally collected by the acquisition unit are sent to the detection unit for fault detection, thereby realizing data playback inversion. The intelligent detection system provided by the present disclosure can make the fault analysis of the secondary equipment of the flexible direct current station simpler, without the need for maintenance personnel to analyze the fault type, reducing labor costs and improving the efficiency of fault analysis. At the same time, the intelligent detection system for the secondary equipment of the flexible direct current station provided by the present disclosure has a simple structure, and can record the data packets of the secondary equipment according to actual needs, or generate detection data according to the collected data packets of the secondary equipment for fault detection.

[0060] like Figure 1 As shown, in some embodiments, the acquisition unit 10 includes not only an analysis and processing subunit 11 and a logic control subunit 12, but also a digital board.

[0061] Specifically, the data board has a sending module and a receiving module. The acquisition unit 10 provided by the present disclosure can be in the form of multiple data boards, and the number of data boards can be freely configured to increase the number of optical ports, which can be specifically configured according to the on-site conditions. Each data board is connected to the analysis and processing subunit 11 and the logic control subunit 12 at the same time. With such a configuration, in the data acquisition and analysis mode, the data board receives data and uploads it to the analysis and processing subunit 11; in the data inversion test mode, the logic control subunit 12 sends the test data to the digital board. It should be noted that in Figure 1 In the description, the acquisition unit 10 includes only two digital boards, a digital board M and a digital board N, and is taken as an example for description, which does not constitute a limitation on the number of digital boards.

[0062] Each digital board has an independent FPGA control chip to independently process data reception or data transmission. Each digital board has multiple FPGA programs to control multiple groups of optical string input ports. Each group of optical string input ports has an independent ID. The working state of the optical string input ports of the digital board is controlled by the management unit 20 to switch the working mode of the intelligent detection system 100, and the working mode of the intelligent detection system 100 is sent to the acquisition unit 10 (including the analysis and processing subunit 11 and the logic control subunit 12). The acquisition unit (including the analysis and processing subunit 11 and the logic control subunit 12) determines the working state of each group of optical string input ports and confirms the working mode of each group of optical ports. Each group of optical string input ports is controlled by the soft pressure plate and the hard pressure plate. The working mode of each group of optical string input ports is changed by changing the soft pressure plate and the hard pressure plate for maintenance. When the soft pressure plate is put into use and the maintenance pressure plate is withdrawn, the group of optical string input ports is in the "data acquisition and analysis mode". When the soft pressure plate is withdrawn and the maintenance pressure plate is put into use, the group of optical string input ports is in the "data inversion test mode".

[0063] Figure 2 The structure diagram of a digital board provided by the embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the acquisition execution unit forwards the data message through the acquisition unit 10 to the secondary device, and the digital plug-in of the acquisition unit 10 adopts an independent FPGA control. Among them, the digital board includes two FPGA program controls. In the data acquisition and analysis mode, the optical module receives the digital message of the acquisition execution unit, one way sends the digital message directly through the optical module, and forwards it to the output optical port to send it to the secondary device. The other way enters the recording module of the FPGA through the physical layer interface (Physical Layer Interface, referred to as PHY) and the media access control (Media Access Control, referred to as MAC) to realize the recording analysis of the digital message. In the data acquisition and analysis mode, the sending control module of the FPGA receives the command of the management unit 20, and sends the data message through the physical layer interface (Physical Layer Interface, referred to as PHY) and the media access control (Media Access Control, referred to as MAC) according to the configuration command.

[0064] In some embodiments, the management unit 20 includes an external communication subunit 21 and a logic processing subunit 22. The external communication subunit 21 is configured to control the working state of the serial input optical port of the digital board based on preset instructions and according to the working mode of the secondary equipment of the flexible direct current station.

[0065] Specifically, the preset instruction is used to indicate the working mode of the secondary equipment of the flexible direct current station. The preset instruction can be an instruction directly input from the outside, or it can be an instruction set based on certain rules, for example, setting the working mode of the secondary equipment of the flexible direct current station to be switched once every preset time period, etc. The present disclosure does not limit this.

[0066] Among them, the working mode of the flexible direct current station secondary equipment includes a normal working mode and a stop detection mode. When the flexible direct current station secondary equipment is in the normal working mode, data messages are continuously generated during the normal working of the flexible direct current station secondary equipment. At this time, the acquisition unit 10 acts as a data cache, and the analysis and processing subunit 11 in the acquisition unit 10 collects the data messages of the flexible direct current station secondary equipment in real time; when the flexible direct current station secondary equipment is in the stop detection mode, the flexible direct current station secondary equipment no longer generates new data. At this time, the acquisition unit 10 acts as a detection device to implement data playback inversion test, and the logic control subunit 12 in the acquisition unit 10 interacts with the management unit 20, and the management unit 20 generates new extended data based on the data message of the flexible direct current station secondary equipment collected by the analysis and processing subunit 11, and the original data message of the flexible direct current station secondary equipment is sent to the corresponding detection unit for fault detection.

[0067] In some embodiments, the working mode of the flexible direct current station secondary device includes a normal working mode. The analysis and processing subunit 11 is specifically configured to read the working state of the serial input optical port of the digital board, and according to the working state of the serial input optical port of the digital board, when the flexible direct current station secondary device is in the normal working mode, collect the data message of the flexible direct current station secondary device, and upload the data message to the logic processing subunit 22. The logic processing subunit 22 is configured to receive the data message, generate an extended data message based on the data message, and send the extended data message to the logic control subunit 12.

[0068] Specifically, when the soft pressure plate of the optical input port corresponding to the digital board is put into operation and the maintenance pressure plate is withdrawn, it indicates that the optical input port of the digital board is in the "data collection and analysis mode". That is, at this time, the secondary equipment of the flexible direct current station is in the normal working mode, and data messages are continuously generated during the normal working of the secondary equipment of the flexible direct current station. At this time, the collection unit 10 acts as a data cache, and the analysis and processing subunit 11 in the collection unit 10 collects the data messages of the secondary equipment of the flexible direct current station in real time and uploads them to the logic processing subunit 22 in the management unit 20.

[0069] In some embodiments, the working mode of the flexible direct current station secondary equipment also includes an outage detection mode, and the logic control subunit 12 is specifically configured to read the working status of the serial input optical port of the digital board, and according to the working status of the serial input optical port of the digital board, when the flexible direct current station secondary equipment is in the outage detection mode, receive the extended data message sent by the logic processing subunit 22, and send the extended data message and the data message to the detection unit for fault detection.

[0070] Specifically, when the soft pressure plate of the optical input port corresponding to the digital board is withdrawn and the maintenance pressure plate is put into use, it indicates that the optical input port of the digital board is in the "data inversion mode". That is, at this time, the secondary equipment of the flexible direct current station is in the shutdown detection mode, and no new data message is generated during the shutdown detection of the secondary equipment of the flexible direct current station. At this time, the acquisition unit 10 serves as a detection device, and the logic control subunit 12 in the acquisition unit 10 inverts the fault waveform data according to the data message of the secondary equipment of the flexible direct current station collected and the extended data message generated by the logic processing subunit 22, so as to realize the fault detection of the secondary equipment of the flexible direct current station.

[0071] The disclosed embodiment is based on preset instructions, according to the working mode of the flexible direct current station secondary equipment, and realizes the switching of the working mode of the intelligent detection system 100 by controlling the working state of the serial input optical port of the digital board. In this way, the intelligent detection system 100 can cache the data messages of the flexible direct current station secondary equipment as a database when the flexible direct current station secondary equipment is in the normal working mode, and can also invert the fault waveform data as a detection device when the flexible direct current station secondary equipment is in the stop detection mode, thereby improving the detection efficiency of the flexible direct current station secondary equipment and reducing the labor cost.

[0072] like Figure 1 As shown, in some embodiments, the management unit 20 includes not only an external communication subunit 21 and a logic processing subunit 22, but also a configuration management subunit 23. The configuration management subunit 23 is configured to perform configuration mapping between the data message and the extended data message and the data channel to obtain a configuration mapping relationship. The logic processing subunit 22 is specifically configured to send the extended data message to the logic control subunit 12 according to the configuration mapping relationship. The logic control subunit 12 is specifically configured to send the extended data message and the data message to the detection unit according to the configuration mapping relationship to perform fault detection.

[0073] Specifically, different data channels correspond to the transmission of different types of data messages. For example, data channel 1 is used to transmit voltage data, data channel 2 is used to transmit current data, and so on. In some embodiments, the configuration management subunit 23 is specifically configured to perform configuration mapping of the data message and the extended data message with the data channel based on preset rules to obtain a configuration mapping relationship. Among them, the preset rules refer to the mapping rules between the data channel and the type of data message corresponding to the data channel. That is, the configuration management subunit 23 maps the data message and / or the extended data message according to the mapping rules set in advance to obtain a configuration mapping relationship. When the logic processing subunit 22 and the logic control subunit 12 transmit data, they are all transmitted according to the configuration mapping relationship. In this way, the accuracy of data transmission can be guaranteed and the efficiency of data processing can be improved.

[0074] In some embodiments, the analysis and processing subunit 11 is specifically configured to collect the original data packets of the flexible direct current station secondary equipment, classify and process the original data to obtain the data packets, and send the data packets to the logic processing subunit 22; wherein the data packets are data of the same fault type.

[0075] Specifically, the analysis and processing subunit 11 performs classification processing on the raw data, which means classifying the collected raw data according to the fault type corresponding to the data message. That is, the obtained data message includes one or more, wherein the data in each data message belongs to the same fault type. Such a setting can ensure the accuracy of the subsequent logic processing subunit 22 learning according to the received data message.

[0076] In some embodiments, the logic processing sub-unit 22 is specifically configured to identify the fault type of the flexible direct current station secondary equipment based on the data message through a neural network model; and according to the fault type of the flexible direct current station secondary equipment, generate a new fault waveform generated by the flexible direct current station secondary equipment when the fault type occurs, obtain the extended data message, and send the extended data message to the logic control sub-unit 12.

[0077] In some embodiments, the neural network model is obtained through neural network training based on fault waveforms simulated by fault tests and fault simulations.

[0078] Specifically, based on the fault type identification function of the LSTM neural network, the flexible direct current station carries out fault tests and fault simulations during maintenance, and uses the acquired data packets (generally in the form of fault waveforms) as data sources to train the LSTM neural network to obtain a neural network model, so that the obtained neural network model can mine the time series characteristics of the fault waveforms generated by the power system under different fault conditions, and based on this, it can identify the fault type under complex fault conditions according to the fault waveforms.

[0079] Among them, the fault type recognition technology based on LSTM. The LSTM model enhances the neural network's ability to process long-term time series through the "gate" structure, and better learns the timing characteristics of fault waveforms. LSTM has three gate structures: forget gate, input gate, and output gate, which together form the neural network module A. The three gates work together to realize the abstract extraction and memory of timing characteristics.

[0080] In some embodiments, the collection unit 10 further includes a data storage subunit 13, wherein the data storage subunit 13 is configured to store the data message of the flexible direct current station secondary device collected by the analysis and processing subunit 11. In this way, in the data propagation test mode, the collection unit 10 can send the extended data generated by the management unit 20 and the data message collected by the collection unit 10 itself to the detection unit for fault detection.

[0081] It should be noted that in the embodiment of the present disclosure, the analysis and processing sub-unit 11 performs fault classification processing on the collected original data message, and the fault type corresponding to the obtained data message is the initial fault type, and the collection unit sends the data message and the extended data message to the detection unit for detection, and the obtained fault type is a specific fault type.

[0082] For example, the fault type obtained by the analysis and processing subunit 11 may be a single-phase grounding fault, a line damage fault, or a line being disturbed by a magnetic field, etc. For a single-phase grounding fault, the fault type finally detected by the detection unit is which device has a short circuit, or the magnitude of the short circuit current, etc.

[0083] The intelligent detection system provided by the embodiment of the present disclosure is applied to the secondary equipment of the flexible direct current station. Among them, the management unit of the intelligent detection system controls the acquisition unit to perform data acquisition or data inversion test by controlling the digital board in the acquisition unit. When the flexible direct current station is in the normal working mode, the intelligent detection system collects data packets of the secondary equipment of the flexible direct current station, and when the flexible direct current station is in the shutdown detection mode, based on the collected data packets, generates extended data, and sends the collected data packets and the generated extended data to the corresponding detection unit to perform an inversion test of the fault data. The intelligent detection system provided by the present disclosure has a simple structure, and can improve the efficiency of fault analysis, while reducing labor costs.

[0084] In a second aspect, based on the same invention, the present disclosure also provides a flexible direct current station, which includes any intelligent detection system 100 in the above-mentioned first aspect.

[0085] In some embodiments, the flexible direct current station includes not only an intelligent detection system, but also primary equipment, a collection execution unit and secondary equipment.

[0086] Figure 3 FIG. 1 is a structural diagram of a flexible direct current station 1000 provided in an embodiment of the present disclosure. Figure 3 As shown, the flexible direct current station 1000 includes an intelligent detection system 100 , a primary device 300 and a secondary device 200 , wherein the intelligent detection system 100 includes a collection unit 10 and a management unit 20 .

[0087] The collection unit 10 is configured to collect data messages of the secondary equipment 300 of the flexible direct current station, and the data messages include analog quantities and switch quantities of the secondary equipment 300 .

[0088] In some embodiments, the flexible direct current station further includes a collection execution unit, wherein the collection execution unit is configured to collect data of the primary device 300 and convert the data to obtain data matching the secondary device 200. That is, the data output by the collection execution unit is the same as the data of the secondary device.

[0089] like Figure 3As shown, specifically, the collection execution unit of the flexible direct current station is connected to the collection unit 10 through a direct collection and direct jump mode. The collection unit 10 receives the data message of the secondary device 300 provided by the collection execution unit, and sends it to the corresponding secondary device 200 in a transparent transmission mode, wherein the secondary device 200 may include at least one of a security control device, a multi-functional measurement and control device, and a protection device. At the same time, the collection unit 10 is also configured to upload the collected data message to the management unit 20, which is analyzed and learned by the management unit 20. In addition, the management unit 20 is also configured to send the extended data obtained by the analysis and learning to the collection unit 10, and the collection unit 10 sends the extended data analyzed and learned by the management unit 20 to the corresponding secondary device 200.

[0090] In some embodiments, the flexible direct current station 1000 further includes an electronic transformer, and the acquisition execution unit is further configured to receive voltage or current data converted and output by the electronic transformer.

[0091] It should be noted that the flexible direct current station 1000 may include multiple acquisition execution units, which correspond to the total number of primary devices and electronic transformers. Among them, the acquisition unit 10 in the intelligent detection system 100 and the multiple acquisition execution units in the flexible direct current station can also be set in a one-to-one correspondence. The multiple acquisition units 10 can be divided according to the number of devices in the secondary device to form multiple groups of serial optical ports.

[0092] In some embodiments, the flexible direct current station provided by the present disclosure establishes a standardized data model for the flexible direct current station secondary equipment and intelligent detection system based on a communication standardization system.

[0093] Among them, the standardized data model of the secondary equipment and intelligent detection system of the flexible direct current station includes three parts: the attribute modeling of the intelligent detection system itself, the standard modeling of the test function data interface, and the communication command modeling.

[0094] The intelligent detection system's own attribute modeling includes setting the maximum voltage, maximum current, number of voltage channels, number of current channels, message format, optical port ID, number of messages, etc.

[0095] Standard modeling of test function data interface in intelligent detection system, including the name and ID of test function, modeling of test parameters and result parameters of various test functions, modeling of data types of various parameters of test functions, including the name and identification of data type, description of value range of data type, etc.

[0096] The process in which the collection execution unit sends data to the collection unit 10 and the process in which the collection unit 10 sends data to the secondary device 200 both involves data transmission through the data transmission protocol.

[0097] Among them, the protocol format modeling of data transmission includes: defining the 60044-7 / 8 message format, sending the total length of the 60044-7 / 8 message, the starting byte identifier of the sampling data channel, the length of the sampling data channel (each channel length), the voltage channel type, the current channel type, the voltage data, the voltage coefficient, the current data, the current coefficient, the starting byte identifier of the sampling counter, and the counting method identifier of the sampling counter to the FPGA program, and the FPGA program fills the data according to the 60044-7 / 8 message format sent by the host computer, and sends the message according to the set sampling rate and baud rate. The starting character of the FT3 message is 0564H, which occupies 2 bytes. After the starting character, it is the customer data, 16 bytes followed by a CRC check code, and so on. At the end of the message, if it is less than 16 bytes, it still follows a 2-byte CRC check code. Determine the length in the FT3 message, start with 0564H, end with CRC, and fill the data and other information sent by the host computer in the middle.

[0098] Communication command modeling specifically refers to the modeling of communication commands between different units or devices.

[0099] For example, the communication commands between the acquisition unit 10 and the management unit 20 during communication are modeled. Alternatively, from a testing perspective, the testing process can be abstracted as follows:

[0100] Step 1: Configure the device under test and prepare for testing;

[0101] Step 2: Control the test system output test volume;

[0102] Step 3: Read status data from the device under test through the communication protocol;

[0103] Step 4: Determine whether the test results are qualified.

[0104] The first and third steps both require communication with the device under test, so the communication commands of the device under test need to be modeled, including communication command modeling and communication parameter modeling of each communication command, combined with sensor layer device modeling, to establish an association or correspondence between the communication command model and the device data model of the device under test, etc. The communication command modeling in this disclosure is not limited to the communication commands mentioned above, as long as the communication part in the flexible direct current station can be modeled, and this disclosure does not limit this.

[0105] It should be noted that other specific implementation details in the flexible direct current station provided in the present disclosure are the same as those of the intelligent detection system provided in the first aspect above, and will not be repeated here. At the same time, the specific details of the intelligent detection system in the flexible direct current station provided in the present disclosure are also applicable to the intelligent detection system in the first aspect above.

[0106] In a third aspect, based on the same inventive concept, the disclosed embodiment also provides an intelligent detection method for secondary equipment of a flexible direct current station, which can be applied to any intelligent detection system in the above-mentioned first aspect.

[0107] Figure 4 The flowchart of an intelligent detection method for a secondary device of a flexible direct current station provided by an embodiment of the present disclosure. The method is applied to an intelligent detection system, the system includes a collection unit and a management unit, and the collection unit includes an analysis and processing subunit and a logic control subunit. Figure 4 As shown, the method comprises the following steps:

[0108] S41. The analysis and processing subunit collects data messages of the secondary equipment of the flexible direct current station and uploads the data messages to the management unit.

[0109] S42: The management unit receives the data message, generates an extended data message based on the data message, and sends the extended data message to the logic control subunit.

[0110] S43: The logic control subunit receives the extended data message sent by the management unit, and sends the extended data message and the data message to the detection unit for fault detection.

[0111] In some embodiments, the acquisition unit also includes a digital board, the management unit includes an external communication subunit and a logic processing subunit, and the method also includes: the external communication subunit controls the working state of the serial input optical port of the digital board based on preset instructions and according to the working mode of the flexible direct current station secondary equipment, wherein the working mode of the flexible direct current station secondary equipment includes a normal working mode.

[0112] Step S41 specifically includes: the analysis and processing sub-unit reads the working status of the serial input optical port of the digital board, and according to the working status of the serial input optical port of the digital board, when the flexible direct current station secondary device is in the normal working mode, collects the data message of the flexible direct current station secondary device, and uploads the data message to the logic processing sub-unit.

[0113] Step S43 specifically includes: the logic control subunit reads the working status of the serial input optical port of the digital board, and based on the working status of the serial input optical port of the digital board, when the secondary equipment of the flexible direct current station is in the shutdown detection mode, receives the extended data message sent by the logic processing subunit, and sends the extended data message and the data message to the detection unit for fault detection.

[0114] In some embodiments, the management unit includes a configuration management subunit and a logic processing subunit, and step 42 specifically includes:

[0115] S431. The configuration management subunit performs configuration mapping on the data message and the extended data message and the data channel to obtain a configuration mapping relationship.

[0116] S432: The logic processing subunit accepts the data message according to the configuration mapping relationship, generates an extended data message according to the data message, and sends the extended data message to the logic control subunit according to the configuration mapping relationship.

[0117] In some embodiments, step S41 specifically includes: the analysis and processing subunit collects the original data message of the flexible direct current station secondary device, classifies and processes the original data to obtain the data message, and sends the data message to the logic processing subunit; wherein the data message is data of the same fault type.

[0118] In some embodiments, step S42 generates an extended data message based on the data message, specifically including: the logic processing subunit identifies the fault type of the flexible direct current station secondary equipment based on the data message through a neural network model; and generates a new fault waveform generated by the flexible direct current station secondary equipment when the fault type occurs according to the fault type of the flexible direct current station secondary equipment, to obtain the extended data message.

[0119] In some embodiments, the neural network model is obtained through neural network training based on fault waveforms simulated by fault tests and fault simulations.

[0120] In some embodiments, the acquisition unit further includes a data storage subunit, and the method includes not only steps S41 to S43, but also step S44: the data storage unit stores the data messages of the flexible direct current station secondary equipment collected by the analysis and processing subunit.

[0121] It should be noted that the specific implementation details of the intelligent detection method for the secondary equipment of the flexible direct current station disclosed in the embodiment of the present disclosure can be found in the intelligent detection system for the secondary equipment of the flexible direct current station provided in the first aspect above, and will not be repeated here.

[0122] In a fourth aspect, an embodiment of the present disclosure further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the methods described in the third aspect when executing the computer program.

[0123] Specifically, Figure 5 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present disclosure, such as Figure 5As shown, the electronic device 003 includes a processor 301, a memory 302 and a bus 303. The processor 301 and the memory 302 communicate with each other via the bus 303.

[0124] The processor 301 is used to call the program instructions in the memory 302 to execute the methods provided by the above method embodiments.

[0125] In a fifth aspect, an embodiment of the present disclosure further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program of the method described in any one of the third aspects above.

[0126] In a sixth aspect, an embodiment of the present disclosure further provides a computer program product, comprising a computer program / instructions, which, when executed by a processor, implement the steps of the method described in any one of the third aspects above.

[0127] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0128] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0129] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0130] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0131] The present disclosure uses specific embodiments to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method of the present disclosure and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present disclosure, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present disclosure.

Claims

1. An intelligent detection system for secondary equipment of a flexible direct current station, characterized in that: The system includes a collection unit and a management unit, wherein the collection unit includes an analysis and processing subunit and a logic control subunit, wherein: The analysis and processing subunit is configured to collect data messages of the secondary equipment of the flexible direct current station and upload the data messages to the management unit; The management unit is configured to receive the data message, generate an extended data message based on the data message, and send the extended data message to the logic control subunit; The logic control subunit is configured to receive the extended data message, and send the extended data message and the data message to the detection unit for fault detection.

2. The system according to claim 1, characterized in that The acquisition unit also includes a digital board, and the management unit includes an external communication subunit and a logic processing subunit, wherein: The external communication subunit is configured to control the working state of the serial input optical port of the digital board based on a preset instruction and according to the working mode of the secondary device of the flexible direct current station, wherein the working mode of the secondary device of the flexible direct current station includes a normal working mode; The analysis and processing subunit is specifically configured to read the working state of the serial input optical port of the digital board, and according to the working state of the serial input optical port of the digital board, when the secondary device of the flexible direct current station is in a normal working mode, collect the data message of the secondary device of the flexible direct current station, and upload the data message to the logic processing subunit; The logic processing subunit is configured to receive the data message, generate an extended data message based on the data message, and send the extended data message to the logic control subunit.

3. The system according to claim 2, characterized in that The working mode of the secondary equipment of the flexible direct current station also includes a shutdown detection mode. The logic control subunit is specifically configured to read the working status of the serial input optical port of the digital board, and based on the working status of the serial input optical port of the digital board, when the secondary equipment of the flexible direct current station is in the shutdown detection mode, receive the extended data message sent by the logic processing subunit, and send the extended data message and the data message to the detection unit for fault detection.

4. The system according to claim 2, characterized in that The management unit also includes: A configuration management subunit is configured to perform configuration mapping on the data message and the extended data message and the data channel to obtain a configuration mapping relationship; The logic processing subunit is specifically configured to send the extended data message to the logic control subunit according to the configuration mapping relationship; The logic control subunit is specifically configured to send the extended data message and the data message to the detection unit according to the configuration mapping relationship to perform fault detection.

5. The system according to claim 2, characterized in that The analysis and processing subunit is specifically configured to collect the original data packets of the flexible direct current station secondary equipment, classify and process the original data to obtain the data packets, and send the data packets to the logic processing subunit; wherein the data packets are data of the same fault type.

6. The system according to claim 2, characterized in that The logic processing sub-unit is specifically configured to identify the fault type of the flexible direct current station secondary equipment based on the data message through a neural network model; and according to the fault type of the flexible direct current station secondary equipment, generate a new fault waveform generated by the flexible direct current station secondary equipment when the fault type occurs, obtain the extended data message, and send the extended data message to the logic control sub-unit.

7. The system according to claim 6, characterized in that The neural network model is obtained through neural network training based on fault waveforms simulated by fault tests and fault simulations.

8. The system according to claim 1, characterized in that The acquisition unit also includes: The data storage subunit is configured to store the data messages of the secondary equipment of the flexible direct current station collected by the analysis and processing subunit.

9. An intelligent detection method for secondary equipment of a flexible direct current station, characterized in that: The method is applied to an intelligent detection system, the system includes a collection unit and a management unit, the collection unit includes an analysis and processing subunit and a logic control subunit, and the method includes: The analysis and processing subunit collects data messages of the secondary equipment of the flexible direct current station and uploads the data messages to the management unit; The management unit receives the data message, generates an extended data message based on the data message, and sends the extended data message to the logic control subunit; The logic control subunit receives the extended data message sent by the management unit, and sends the extended data message and the data message to the detection unit to perform fault detection.

10. The method according to claim 9, characterized in that The acquisition unit further includes a digital board, the management unit includes an external communication subunit and a logic processing subunit, and the method further includes: The external communication subunit controls the working state of the serial input optical port of the digital board based on the preset instruction and according to the working mode of the secondary equipment of the flexible direct current station, wherein the working mode of the secondary equipment of the flexible direct current station includes a normal working mode; wherein the working mode of the secondary equipment of the flexible direct current station includes a normal working mode and a stop detection mode; The analysis and processing subunit reads the working state of the serial input optical port of the digital board, and according to the working state of the serial input optical port of the digital board, when the secondary device of the flexible direct current station is in the normal working mode, collects the data message of the secondary device of the flexible direct current station, and uploads the data message to the logic processing subunit; The logic control subunit reads the working status of the serial input optical port of the digital board, and based on the working status of the serial input optical port of the digital board, when the secondary equipment of the flexible direct current station is in the shutdown detection mode, receives the extended data message sent by the logic processing subunit, and sends the extended data message and the data message to the detection unit for fault detection.

11. The method according to claim 10, characterized in that The analyzing and processing subunit collects data messages of the secondary equipment of the flexible direct current station and uploads the data messages to the management unit, specifically including: The analysis and processing subunit collects the original data message of the secondary equipment of the flexible direct current station, and classifies and processes the original data to obtain the data message, wherein the data message is data of the same fault type; The data message is uploaded to the logic processing subunit.

12. The method according to claim 11, characterized in that The management unit generates an extended data message based on the data message, and sends the extended data message to the collection unit, including: The logic processing subunit identifies the fault type of the secondary equipment of the flexible direct current station based on the data message through a neural network model; According to the fault type of the flexible direct current station secondary equipment, a new fault waveform generated by the flexible direct current station secondary equipment when the fault type occurs is generated, the extended data message is obtained, and the extended data is sent to the logic control subunit.

13. A flexible direct current station, characterized in that: Comprising the intelligent detection system as described in any one of claims 1-8.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program for executing the method according to any one of claims 9 to 12.

15. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 9 to 12 are implemented.

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