Pressing plate state monitoring device and method based on WAPI wireless local area network

Abstract

The invention provides a pressing plate state monitoring device and method based on a WAPI wireless local area network. The device comprises a station control layer, a convergence layer and a sensing layer which are in communication connection in sequence, at least one pressing plate state acquisition terminal with a WAPI wireless communication function is deployed on the sensing layer, and the pressing plate state acquisition terminal acquires state data of a pressing plate and transmits the state data to the convergence layer through the WAPI wireless communication function; the convergence layer is provided with a WAPI wireless security access point, and the WAPI wireless security access point receives state data transmitted by the pressing plate state acquisition terminal and transmits the state data to the station control layer through the Ethernet. Data transmission between the pressing plate position sensor and the convergence layer is achieved through WAPI wireless communication so as to meet the national secret transmission requirement, and meanwhile the stability of WAPI wireless communication is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of intelligent monitoring of secondary equipment of power systems, and particularly relates to a pressboard state monitoring device and method based on a WAPI wireless local area network. BACKGROUND

[0002] With the development and continuous popularization of artificial intelligence, in a substation, since power stations are generally arranged in areas far away from personnel gathering areas, and just such an arrangement position, it is convenient to monitor and maintain, which has become a problem that must be solved at present.

[0003] At present, monitoring of pressboards, which are secondary equipment, is mainly used to achieve this, and WiFi / ZigBee wireless mode is used to achieve transmission of monitoring data. The WiFi / ZigBee protocol can well solve off-site / remote monitoring, but in a strong electromagnetic environment of a substation, communication stability is poor, and its encryption authentication mechanism does not meet the national encryption requirement, and data transmission is easily intercepted and attacked. SUMMARY

[0004] The main purpose of the present application is to provide a pressboard state monitoring device and method based on a WAPI wireless local area network, to solve the problems of low safety performance and poor communication stability of existing substation pressboard state monitoring data transmission.

[0005] In a first aspect, the present application provides a pressboard state monitoring device based on a WAPI wireless local area network, comprising: a station control layer, a convergence layer and a sensing layer which are sequentially communicatively connected;

[0006] At least one pressboard state acquisition terminal with a WAPI wireless communication function is arranged on the sensing layer, the pressboard state acquisition terminal acquires state data of pressboards, and transmits the state data to the convergence layer through the WAPI wireless communication function;

[0007] A WAPI wireless security access point is arranged on the convergence layer, the WAPI wireless security access point receives the state data transmitted by the pressboard state acquisition terminal, and transmits the state data to the station control layer through Ethernet.

[0008] Optionally, the pressboard state acquisition terminal comprises at least one pressboard position sensor and a WAPI communication module;

[0009] The at least one pressboard position sensor is arranged side by side and communicatively connected to the WAPI communication module through a communication bus, and after each pressboard position sensor acquires state data of each pressboard, the state data is aggregated to the WAPI communication module and transmitted to the convergence layer.

[0010] Optionally, the pressure plate position sensor is provided with N parallel pressure plate channels, each corresponding to a pressure plate, and each pressure plate channel detects the on-off state of the corresponding pressure plate through magnetic induction principle, wherein N is in the range of [1, 72].

[0011] Optionally, the pressure plate position sensor comprises a shell, and a micro-power embedded MCU, N magnetic induction sensors, a battery and an indicator light integrated in the shell.

[0012] Optionally, the network segments of the pressure plate state acquisition terminals or the pressure plate position sensors are different from each other.

[0013] Optionally, the station control layer is provided with at least one monitoring management unit for acquiring the state data of the pressure plates sent by the WAPI wireless security access point through Ethernet, and performing visual, alarm analysis and processing on the state data.

[0014] In the first aspect, the application further provides a monitoring method applied to the pressure plate state monitoring device based on the WAPI wireless LAN provided above, comprising:

[0015] The identity authentication mechanism and the encryption protocol are used to establish an encrypted communication link between the pressure plate state acquisition terminals in the sensing layer and the WAPI wireless security access point in the convergence layer.

[0016] The state data of each pressure plate collected by the pressure plate position sensor on the pressure plate state acquisition terminal is acquired, and the collected state data is transmitted to the WAPI wireless security access point for centralized convergence storage based on the encrypted communication link.

[0017] The WAPI wireless security access point uploads the state data after convergence storage to the station control layer for visual and alarm analysis processing according to the transmission protocol agreed in advance with the station control layer through Ethernet.

[0018] Optionally, the acquisition of the state data of each pressure plate collected by the pressure plate position sensor on the pressure plate state acquisition terminal comprises:

[0019] The on-off state of each pressure plate at the pressure plate position of the pressure plate position sensor is collected through magnetic induction principle, and is transmitted to the WAPI communication module of the pressure plate state acquisition terminal, and the state data is outputted according to the pressure plate position sensor.

[0020] Optionally, the transmission of the collected state data to the WAPI wireless security access point for centralized convergence storage based on the encrypted communication link comprises:

[0021] The collected state data is encrypted by using a WPA3 encryption protocol and / or an advanced encryption standard (AES), and the encrypted ciphertext is transmitted to the WAPI wireless security access point through the encrypted communication link.

[0022] The WAPI wireless security access point classifies all the received state data according to the pressing plate position sensor, and stores the classified data according to the categories.

[0023] Optionally, after the WAPI wireless security access point classifies all the received state data according to the pressing plate position sensor, the method further comprises:

[0024] The classified state data is reclassified and sorted according to the priorities of the pressing plate type, the pressing plate state, the equipment position and the collection time, and the state data is output.

[0025] Optionally, the WAPI wireless security access point transmits the stored state data to the station control layer through the Ethernet according to a transmission protocol agreed in advance with the station control layer, and the station control layer performs visualized and alarm analysis processing, comprising:

[0026] The WAPI wireless security access point transmits the stored state data to the monitoring management unit of the station control layer through the Ethernet.

[0027] The monitoring management unit sorts the received state data according to the pressing plate position to generate a pressing plate array, and generates a view display based on the pressing plate array and the corresponding on-off state.

[0028] The on-off state of each pressing plate is diagnosed for fault, and alarm information is generated.

[0029] Optionally, the monitoring method further comprises:

[0030] Each pressing plate state collection terminal and / or each pressing plate position sensor is configured with a main network segment and a backup network segment based on the frequency range of the WAPI wireless communication through virtual local area network technology.

[0031] The interference degree of the main network segment of the pressing plate state collection terminal and the pressing plate position sensor is monitored in real time, and when the interference degree exceeds a threshold value, the backup network segment is switched to continue transmitting data.

[0032] The present application brings the following beneficial effects:

[0033] The aforementioned pressure plate status monitoring device and method based on WAPI wireless local area network includes: a station control layer, a convergence layer, and a sensing layer connected in sequence; at least one pressure plate status acquisition terminal with WAPI wireless communication function is deployed on the sensing layer, which acquires the pressure plate status data and transmits the status data to the convergence layer via WAPI wireless communication; a WAPI wireless security access point is provided on the convergence layer, which receives the status data transmitted by the pressure plate status acquisition terminal and transmits the status data to the station control layer via Ethernet. Data transmission between the pressure plate position sensor and the convergence layer is achieved through WAPI wireless communication to meet national cryptographic requirements, while also providing greater stability.

[0034] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application are realized and obtained through the structures particularly pointed out in the description, claims and drawings.

[0035] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 A schematic diagram of an embodiment of the pressure plate status monitoring device based on WAPI wireless local area network provided in this application;

[0038] Figure 2 A schematic diagram of another embodiment of the pressure plate status monitoring device based on WAPI wireless local area network provided in this application;

[0039] Figure 3 This is a flowchart of an embodiment of the pressure plate status monitoring method based on WAPI wireless local area network provided in this application. Detailed Implementation

[0040] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the term "comprising" or "having" and any variation thereof is intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0042] The embodiment of the present application provides a pressboard state monitoring device based on a WAPI wireless local area network. The device adds a WAPI communication module on a convergence layer and a sensing layer, so that the on-off state of the pressboard is transmitted through the WAPI wireless local area network. In this way, the wireless communication mode simplifies the line structure of the pressboard area, and the security encryption is stronger than the existing WiFi mode, meets the national secret requirement, and can be applied to the interference problem in the complex environment of a transformer substation.

[0043] For the convenience of understanding, the specific process of the embodiments of the present application will be described below. Please refer to Figure 1 An embodiment of the pressboard state monitoring device based on a WAPI wireless local area network in the embodiment of the present application, the device specifically comprises: a station control layer 110, a convergence layer 120 and a sensing layer 130, wherein the convergence layer 120 and the sensing layer 130 are connected through a WAPI wireless mode, that is, the convergence layer 120 and the sensing layer 130 are arranged in the same WAPI wireless local area network, and the station control layer 110 and the convergence layer 120 can be connected through one of a wireless mode and a wired mode.

[0044] In the embodiment, at least one pressure plate state acquisition terminal 131 with WAPI wireless communication function is arranged on the sensing layer 130. The pressure plate state acquisition terminal 131 acquires the state data of the pressure plate and transmits the state data to the convergence layer 120 through the WAPI wireless communication function. The convergence layer 120 is provided with a WAPI wireless security access point 121. The WAPI wireless security access point 121 receives the state data transmitted by the pressure plate state acquisition terminal 131 and transmits the state data to the station control layer 110 through Ethernet, as shown in Figure 2 .

[0045] Specifically, the pressure plate state acquisition terminal 131 includes at least one pressure plate position sensor 1311 and a WAPI communication module 1312.

[0046] The at least one pressure plate position sensor 1311 is arranged side by side and is in communication connection with the WAPI communication module 1312 through a communication bus 1313. After each pressure plate position sensor 1311 acquires the state data of each pressure plate, the state data is aggregated and transmitted to the convergence layer 120 by the WAPI communication module 1312.

[0047] It should be noted that the sensing layer 130 is actually a device layer for acquiring the on-off state of the pressure plate. It is composed of at least one pressure plate state acquisition terminal 131, and each pressure plate state acquisition terminal 131 is provided with multiple sensors for acquiring the on-off state of the pressure plate, as shown in Figure 2 . It is actually composed of at least one pressure plate position sensor 1311. In the figure, each pressure plate state acquisition terminal 131 is provided with three pressure plate position sensors 1311. Each pressure plate state acquisition terminal 131 is actually a terminal in the form of a protective screen. All pressure plate position sensors 1311 on the terminal are arranged in parallel and connected together through a bus 1313. Each pressure plate position sensor 1311 can report the state data of the pressure plate to the convergence layer 120 through the bus 1313.

[0048] In actual application, the pressure plate position sensor 1311 is provided with N parallel pressure plate channels. Each pressure plate channel corresponds to one pressure plate. The on-off state of each pressure plate is detected in parallel through the magnetic induction principle. The value of N ranges from 1 to 72.

[0049] That is, the pressure plate position sensor 1311 uses the magnetic induction principle to realize real-time sensing of the state of the pressure plate. A single pressure plate position sensor 1311 supports parallel monitoring of up to 72 pressure plate positions. During operation, it communicates with the WAPI security access point 121 device of the convergence layer 120 in the substation through a WAPI wireless network. The communication supports Wapi PSK and certificate security authentication technology.

[0050] The WAPI wireless security access point 121 transmits the pressure plate state information sent by the pressure plate position sensor 1311 and communicates with the station control layer 110 of the pressure plate central station 110 in an Ethernet mode.

[0051] In the embodiment, the station control layer 110 receives the latest pressure plate state transmitted by the WAPI wireless security access point 121 and the working voltage of each pressure plate position sensor 1311 in real time, and centrally manages the pressure plate information and communicates with an external system, wherein the station control layer 110 communicates with the external system by using a DL / T860 protocol to realize transmission.

[0052] In the embodiment, the pressure plate position sensor includes a shell, a micro-power embedded MCU, N magnetic induction sensors, a battery and an indicator light integrated in the shell. The sensor collects the pressure plate on-off position by using a magnetic induction principle, wherein a magnet is built in the sensor and is installed by using magnetic attraction and VHB paste to ensure the stability of installation.

[0053] In actual application, the convergence layer 120 and the sensing layer 130 are actually arranged in the same area, and at this time, the pressure plate position and the working state of the sensor sent by the pressure plate position sensor 1311 can be directly managed and transmitted by increasing the WAPI wireless network facility and the WAPI security access AP in the area and by using the WAPI wireless network facility and the WAPI security access AP.

[0054] The pressure plate position sensor 131 is powered by a battery and is installed on the front of the pressure plate state collection terminal 131, and is connected with the WAPI wireless network and the security access AP in the area; the station control layer 110 is connected with the security access AP by using an Ethernet line. The state information of the pressure plate is centrally managed in the station control layer 110, and functions such as online monitoring, visual display, state query and log management are supported.

[0055] Specifically, the basic parameter settings of the pressure plate position sensor 131 are as follows:

[0056] (1) Working power supply: lithium sulfonyl chloride (Li / SOCl2) battery, battery capacity ≥17000 mAh, 3.6V, theoretical working time not less than 8 years, and the sensor battery is replaceable;

[0057] (2) Size: 27mm*57mm*45mm;

[0058] (3) Position sensing: magnetic induction principle, supporting various types of required monitoring continuous sheet, spring type pressure plate, and no electrical connection with the secondary circuit;

[0059] (4) Data transmission: 2.4 / 5G communication frequency band, national Wapi security transmission protocol;

[0060] (5) Press plate position monitoring: real-time alarm and periodic report, with power-on operation and position alarm, periodic indication light;

[0061] (6) Data retention: no data loss during power failure, retaining pre-power-off state data and restoring automatically after power-on;

[0062] (7) Self-checking alarm: supporting software and hardware self-diagnosis functions, battery voltage uploadable;

[0063] (8) Physical ID: with sensor unique coding function;

[0064] (9) Configuration: with Test button, supporting configuration, receiving configuration information download and reading.

[0065] In the embodiment, the station control layer 110 is provided with at least one monitoring management unit 111 for acquiring, through Ethernet, state data of a press plate sent by the WAPI wireless security access point 121 and performing visualized, alarm analysis processing on the state data.

[0066] It can be understood that the monitoring management unit 111 can be a computer or a server, which communicates with the WAPI wireless security access point 121 in the convergence layer 120 through wireless communication modes such as Ethernet to acquire data of a press plate on-off state sent by the WAPI wireless security access point 121, then performs visualized processing and fault or alarm analysis based on preset rules or models. Further, the analyzed information can also be displayed on the visualized data.

[0067] Further, the monitoring management unit 111 can also be a 2U high fanless embedded device, configured with 2980U Processor, 4-8G DDR3L memory and ≥320G storage, supporting DL / T 860 protocol and external application system communication.

[0068] In the embodiment, the parameter settings of the monitoring management unit 111 are as follows:

[0069] (1) Working voltage: AC: 220V; DC: 110V / 220V;

[0070] (2) 2980U Processor, 4-8G DDR3L memory and ≥320G storage;

[0071] (3) 2U rack-mounted case, fanless, dustproof;

[0072] (4) 6 gigabit Ethernet ports, 8-way 485 serial ports;

[0073] (5) External communication: support IEC61850 information model and transmission protocol to upload data information by means of fault recording networking, secondary equipment online monitoring substation, WAPI and IV area network;

[0074] (6) Account management: support binding of devices that need to collect data and physical IDs, device unique identification codes and other related associated equipment of the substation.

[0075] Further, when the monitoring management unit 111 communicates with the external system, it further comprises:

[0076] Timely upload the press plate state snapshot to the power monitoring system, and the synchronization period is less than or equal to 50 ms;

[0077] Provide a remote operation interface based on the DL / T860 protocol, and support authorized users to remotely retrieve press plate data.

[0078] The device provided in the embodiment has the advantages that the WAPI wireless local area network is used for transmission of press plate state data, so that the security of the press plate state data is improved, and the network segment characteristics of the WAPI wireless local area network have good anti-interference performance, so that the accuracy of data transmission is ensured.

[0079] Based on the structure of the press plate state monitoring device based on the WAPI wireless local area network provided above, the application further provides a press plate state monitoring method based on the WAPI wireless local area network, as shown in Figure 3 The method specifically comprises the following steps:

[0080] S210, an encrypted communication link between each press plate state collection terminal in the sensing layer and the WAPI wireless security access point in the convergence layer is established by using a preset identity authentication mechanism and an encryption protocol;

[0081] It should be noted that the sensing layer is a press plate collection device composed of a plurality of press plate state collection terminals, and a plurality of press plate position sensors are arranged on the press plate state collection terminal, each press plate position sensor can collect the on-off state of a plurality of press plates, and the press plate state collection terminal is a device provided with a WAPI communication module, that is, after the press plate state collection terminal collects the press plate state data on the press plate position sensor, the press plate state data is encrypted according to the preset encryption protocol and sent to the convergence layer through the WAPI communication module.

[0082] Before transmitting such data, an encrypted communication link between the sensing layer and the convergence layer needs to be established, specifically, the press plate state collection terminal and the convergence layer need to be registered to realize identity authentication, and then the link is constructed based on the encryption protocol.

[0083] In the embodiment, the encryption protocol is a combination of one or both of WPA3 encryption and AES encryption, wherein WPA3 encryption refers to the latest WPA3 encryption protocol, which is used to provide stronger data encryption and user authentication mechanism; AES encryption refers to encrypting data using the Advanced Encryption Standard (AES), which is used to ensure the security of data transmission.

[0084] Further, the identity authentication mechanism can be an 802.1X authentication mechanism and a multi-factor authentication mechanism (MFA), wherein the 802.1X authentication mechanism can ensure that only authenticated devices can access the network; the multi-factor authentication mechanism (MFA) requires the combination of passwords, biometric identification, and other authentication mechanisms, which can improve the security of authentication.

[0085] In the embodiment, after the encrypted communication link is established, each press plate state acquisition terminal and / or each press plate position sensor is configured with a main network segment and a backup network segment based on the frequency range of WAPI wireless communication through virtual local area network technology; the interference degree of the main network segment of the press plate state acquisition terminal and the press plate position sensor is monitored in real time, and when the interference degree exceeds a threshold, the backup network segment is switched to continue data transmission.

[0086] It can be understood that the network segment of each press plate state acquisition terminal or each press plate position sensor is configured mainly to achieve network isolation, which can avoid mutual interference between links and improve the accuracy of data reception on the basis of realizing data transmission security. In addition to the above effects, configuring different network segments actually configures independent networks, limiting their access rights to internal networks, and controlling the access rights of the convergence layer to different sensors in the sensing layer in combination with the use of the identity authentication mechanism.

[0087] S220, acquiring the state data of each press plate collected by the press plate position sensor on the press plate state acquisition terminal, and transmitting the collected state data to the WAPI wireless security access point based on the encrypted communication link for centralized convergence and storage;

[0088] In the embodiment, the on-off state of each press plate position of the press plate position sensor is collected by the magnetic induction principle and transmitted to the WAPI communication module of the press plate state acquisition terminal, classified according to the press plate position sensor, and the state data is output.

[0089] It can be understood that a plurality of platen channels are arranged on the platen position sensor, and a sensor is arranged on each platen channel. After the platen is fixed on the platen channel, the sensor collects the on-off state of the platen by using the magnetic induction principle, and marks the corresponding platen channel identifier and the device identifier of the platen position sensor, so as to output a state data of the platen. In the same platen position sensor, the state data of the platen is sorted and combined in the order of the position of the platen channel, to obtain a platen data sequence, which is given to the WAPI communication module. The WAPI communication module splices the platen data sequences of all platen position sensors on the platen state collection terminal in the order of the position, to obtain a platen data set. Finally, the platen data set is transmitted to the WAPI wireless security access point of the convergence layer through the WAPI wireless network.

[0090] In actual application, the on-off state of the platen is actually obtained by the sensor. When the sensor is arranged on the platen, the sensor is fixed by using the magnetic attraction and VHB pasting mode according to the type of the platen.

[0091] The working principle of the sensor is a low-power wake-up transmission principle. The sensor adopts an intermittent wake-up mechanism. When the sensor is in sleep mode, the current is less than or equal to 100 microamperes. When the sensor collects data, the WAPI communication module is woken up to send data.

[0092] Specifically, the on-off position of the platen is collected by using the magnetic induction principle. A platen position collection array is installed in the platen area of the screen cabinet. Each row of the array is composed of a corresponding antenna of the platen. A magnetic induction sensor is arranged on the antenna. Meanwhile, a platen sheath with a magnetic steel accessory (a silica gel sheath that can be adapted to various styles) is buckled on the continuous sheet of each platen. When the platen is in the on position, the magnetic induction sensor of the antenna senses the proximity of the magnetic steel, and outputs an on signal. When the platen is in the off position, the magnetic induction sensor cannot sense the magnetic steel, and outputs an off signal.

[0093] It should be noted that before transmission, the identity of the platen state collection terminal needs to be authenticated. For example, WAPI PSK or certificate authentication can be used for identity verification. After verification, the platen data set is encrypted by using an encryption protocol and then transmitted.

[0094] Specifically, the WPA3 encryption protocol and / or the advanced encryption standard AES are used to encrypt the collected state data, and the encrypted ciphertext is transmitted to the WAPI wireless security access point through the encryption communication link. The WAPI wireless security access point classifies all the received state data according to the platen position sensor, and stores the classified data according to the category. At this time, the classification can be understood as being based on the device identifier of the platen position sensor.

[0095] Further, after the WAPI wireless security access point classifies all the received state data according to the position sensor of the pressboard, it further includes:

[0096] The classified state data is further classified and sorted according to the priority of the pressboard type, the pressboard state, the equipment position and the collection time, and the state data is output.

[0097] Pressboard type: classified according to the function of the pressboard, such as protection function pressboard, outlet pressboard, locking pressboard, etc.

[0098] Pressboard state: classified according to the on-off state of the pressboard, such as on state and off state.

[0099] Equipment position: classified according to the position of the pressboard in the equipment or screen cabinet, such as main transformer protection screen and line protection screen.

[0100] Time dimension: classified according to the time of data collection, such as real-time data and historical data.

[0101] S230, the WAPI wireless security access point transmits the stored state data to the station control layer through Ethernet according to the transmission protocol agreed in advance with the station control layer, and uploads it to the station control layer for visualization and alarm analysis processing.

[0102] It can be understood that the WAPI wireless security access point transmits the stored state data to the monitoring management unit of the station control layer through Ethernet; the monitoring management unit sorts the received state data according to the position of the pressboard to generate a pressboard array, and generates a view based on the pressboard array and the corresponding on-off state; the on-off state of each pressboard is diagnosed to generate alarm information.

[0103] In this embodiment, in order to ensure the stability of the pressboard position sensor, a safety control step is further included in the process of collecting the on-off state of the pressboard:

[0104] Electromagnetic compatibility processing: the sensor shell is made of electromagnetic shielding material to reduce the interference of strong electromagnetic environment (≤120dBμV / m) of the substation on signal transmission;

[0105] Self-diagnosis alarm: the management unit monitors the working voltage of the sensor in real time, and triggers a low power alarm when the battery voltage is lower than 3.0V;

[0106] Network isolation: the sensor network and the station control layer network are logically isolated by VLAN technology to limit the data flow.

[0107] The electromagnetic compatibility processing further includes:

[0108] Radio frequency filtering: the sensor WAPI module is built-in with a band-pass filter to filter out interference signals outside the 2.4GHz frequency band;

[0109] Grounding treatment: the AP device reduces the grounding resistance to ≤4Ω through multi-point grounding to reduce common-mode interference.

[0110] To sum up, the method effectively solves the problems of low data transmission security performance and poor communication stability in the existing substation pressure plate monitoring scheme by adopting the national WAPI security authentication protocol, dynamic channel switching mechanism and hierarchical network architecture. Specifically, the transmission security compliance is realized by the SM4 encryption algorithm and 802.1X authentication to meet the national secret requirements of the power system; the communication success rate is improved and the delay is reduced by using the multi-network segment anti-interference design; the deployment cost is reduced by combining non-intrusive installation and long-life battery design, and the long-term stable operation in a strong electromagnetic environment is ensured by the hardware-level security isolation and self-diagnosis function, thereby comprehensively improving the safety, reliability and economy of the secondary equipment monitoring of the power system.

[0111] The present application further proposes a computer readable storage medium storing computer executable instructions, which, when called and executed by a processor, cause the processor to implement the pressure plate state monitoring method based on the WAPI wireless local area network

[0112] The computer readable storage medium refers to a physical carrier that can persistently store data and support processor reading, and can be implemented by a solid state disk, a flash memory chip or an optical disc, and its function is to provide a stable and reliable instruction storage environment for algorithm execution. The computer executable instructions refer to a code set written by a programming language and executable by compilation, and can be implemented by Python, C++ or Java language, and its function is to convert the fault monitoring method of the mobile substation into an operation process that can be recognized by hardware. The processor refers to an integrated circuit that performs arithmetic logic operations, and can be implemented by a multi-core CPU, GPU or TPU architecture, and its function is to accelerate the feature extraction, matrix decomposition and model training process through parallel computing.

[0113] Finally, it should be noted that the above examples are merely specific embodiments of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the same. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that, within the technical scope disclosed by the present application, any person skilled in the art can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A WAPI-based wireless local area network-based press pad state monitoring device, characterized in that, The device comprises a station control layer, a convergence layer and a sensing layer connected in sequence; At least one pressure plate state acquisition terminal with WAPI wireless communication function is arranged on the sensing layer, the pressure plate state acquisition terminal acquires state data of the pressure plate, and transmits the state data to the convergence layer through the WAPI wireless communication function; The convergence layer is provided with a WAPI wireless security access point, the WAPI wireless security access point receives the state data transmitted by the pressure plate state acquisition terminal, and transmits the state data to the station control layer through Ethernet.

2. A presspad condition monitoring apparatus according to claim 1, characterised in that, The pressure plate state acquisition terminal comprises at least one pressure plate position sensor and a WAPI communication module; The at least one pressure plate position sensor is arranged side by side and is connected with the WAPI communication module through a communication bus, and after each pressure plate position sensor acquires state data of each pressure plate, the state data is aggregated and transmitted to the convergence layer by the WAPI communication module.

3. A presspad condition monitoring apparatus according to claim 2, characterised in that, The pressure plate position sensor is provided with N parallel pressure plate channels, each pressure plate channel corresponds to one pressure plate, and the on-off state of each pressure plate is detected in parallel through the magnetic induction principle, wherein the value range of N is [1, 72].

4. A presspad condition monitoring apparatus according to claim 3, characterised in that, The pressure plate position sensor comprises a shell, a micro-power embedded MCU, N magnetic induction sensors, a battery and an indicator light integrated in the shell.

5. The presspad condition monitoring apparatus of claim 2, wherein, The network segments of each pressure plate state acquisition terminal or each pressure plate position sensor are different from each other.

6. A presspad condition monitoring device according to any one of claims 1 to 5, characterised in that, The station control layer is provided with at least one monitoring management unit for acquiring the state data of the pressure plate transmitted by the WAPI wireless security access point through Ethernet, and performing visualization, alarm analysis and processing on the state data.

7. A monitoring method applied to the WAPI-based wireless local area network-based press pad state monitoring device according to any one of claims 1-6, characterized in that, The monitoring method comprises: An encrypted communication link between each pressure plate state acquisition terminal in the sensing layer and the WAPI wireless security access point in the convergence layer is established by using a preset identity authentication mechanism and encryption protocol; The state data of each pressure plate collected by the pressure plate position sensor on the pressure plate state acquisition terminal is acquired, and each collected state data is transmitted to the WAPI wireless security access point for centralized storage based on the encrypted communication link; The WAPI wireless security access point transmits the state data stored after convergence to the station control layer through Ethernet according to the transmission protocol agreed with the station control layer in advance for visualization and alarm analysis and processing.

8. The monitoring method according to claim 7, characterized in that, The acquisition of the state data of each pressure plate collected by the pressure plate position sensor on the pressure plate state acquisition terminal comprises: The on-off state of each pressure plate at the pressure plate position sensor is collected through the magnetic induction principle and transmitted to the WAPI communication module of the pressure plate state acquisition terminal, and the state data is classified according to the pressure plate position sensor and output.

9. The monitoring method according to claim 7, characterized in that, The centralized storage of each collected state data to the WAPI wireless security access point based on the encrypted communication link comprises: The collected state data is encrypted by using the WPA3 encryption protocol and / or the advanced encryption standard AES, and the encrypted ciphertext is transmitted to the WAPI wireless security access point through the encrypted communication link; The WAPI wireless security access point classifies all received state data according to the position sensor of the press plate, and stores the classified data according to the category.

10. The monitoring method according to claim 9, characterized in that, After the WAPI wireless security access point classifies all received state data according to the position sensor of the press plate, it further comprises: The classified state data is reclassified and sorted according to the priority of the press plate type, the press plate state, the equipment position and the collection time, and the state data is output.

11. The monitoring method according to any one of claims 7-10, characterized in that, The WAPI wireless security access point transmits the stored state data to the station control layer for visual display and alarm analysis processing according to the transmission protocol agreed in advance with the station control layer through Ethernet, comprising: The WAPI wireless security access point transmits the stored state data to the monitoring management unit of the station control layer through Ethernet; The monitoring management unit sorts the received state data according to the position of the press plate to generate a press plate array, and generates a view based on the press plate array and the corresponding on-off state; Diagnose the on-off state of each press plate to generate alarm information.

12. The monitoring method according to any one of claims 7-10, characterized in that, The monitoring method further comprises: Configure the main network segment and the standby network segment of each press plate state collection terminal and / or each press plate position sensor based on the frequency range of WAPI wireless communication through virtual local area network technology; Real-time monitor the interference degree of the main network segment of the press plate state collection terminal and the press plate position sensor, and switch to the standby network segment to continue data transmission when the interference degree exceeds the threshold.

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