A method and system for wireless access and online verification of anti-mismovement keys in a substation

Abstract

The present invention discloses a method and system for wireless access and online verification of a substation anti-mistaken movement key. The method is applied to a substation anti-mistaken wireless online verification network including an anti-mistaken host, an anti-mistaken movement key, and a convergence terminal. When the anti-mistaken movement key enters the operation interval, it receives periodic broadcast messages sent by the convergence terminal, monitors the signal of the received message in real time to determine whether it has entered other room intervals, and gradually sends application access signals according to preset frequencies. After receiving the access response, it establishes a connection with the terminal, thereby realizing automatic access to the online verification network of the operation interval; after the anti-mistaken movement key accesses the verification network, it gradually verifies whether the status information of each device is consistent with the status information of the simulated preview device, and performs an unlocking operation. According to the present invention, the anti-mistaken movement key can communicate with the anti-mistaken host in real time during the task execution process to verify the power grid operation information, and can also realize the online simulation preview production operation task.

Description

Technical Field

[0001] The invention relates to the field of substation automation, and in particular to a method and system for wireless access and online verification of anti-mismovement keys of a substation. Background Art

[0002] After nearly 30 years of development, the substation error prevention system has been widely promoted and used in the power system, playing an important role in power safety production. In recent years, with the orderly advancement of smart substations, smart IoT systems, and autonomous and controllable new generation substation secondary systems, the management capabilities of substations have been greatly improved, especially since 2019, when State Grid Corporation and China Southern Grid Corporation have focused on the application of strong smart grids and ubiquitous power IoT technologies. Since 2020, they have vigorously promoted the autonomous, controllable, safe and reliable new generation of smart substations. Relevant technological breakthroughs have gradually been achieved across the country, and important pilot projects have been implemented. As an important component of the substation and a core subsystem to ensure safe operation, the error prevention system can no longer fully meet the needs of safety, efficiency and intelligence in grid operation and power production operations.

[0003] The existing substation anti-error locking operation adopts an offline mode. After the smart computer key receives the task issued by the integrated intelligent anti-error host, it is in an offline state when communicating with the integrated intelligent anti-error host during the task execution. The data cannot be transmitted back in real time, and online comprehensive verification cannot be performed. The unlocking operation is only performed in sequence according to the stored task sequence. It does not communicate with the anti-error host in real time, and cannot perceive the changes in the power grid operation mode in real time. When the real-time operation mode of the power grid is inconsistent with the initial state of the simulation rehearsal, if the operation is still performed according to the simulation rehearsal state, it may cause personal or equipment safety accidents.

[0004] In addition, the error prevention related systems have problems of system isolation and data islands, and the role of each information system has not been fully utilized. The permissions, data, and functions between multiple systems such as the computer error prevention system, access control system, and lock control system have not been effectively integrated, and the system applications are relatively isolated, lacking data sharing and business collaboration. For example, the control of auxiliary equipment has not been integrated with the error prevention system, and it is impossible to realize the intelligent association authorization management of auxiliary locks and switching operations, maintenance operations, and daily maintenance. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to propose a method and system for wireless access and online verification of anti-error mobile keys in substations, so that after receiving the task issued by the comprehensive intelligent anti-error host, the anti-error key can communicate with the comprehensive intelligent anti-error host in real time during the execution of the task, and verify the power grid operation information such as equipment status and power grid operation mode, and can also realize online simulation and rehearsal of production operation tasks.

[0006] Technical solution: In the first aspect, a method for wireless access and online verification of a substation anti-mistaken mobile key is applied to a substation anti-mistaken wireless online verification network including an anti-mistaken host, an anti-mistaken mobile key, and a convergence terminal. The method comprises the following steps:

[0007] (1) The anti-accidental movement key configures and stores the communication frequencies used by all aggregation terminals. The aggregation terminal configures and stores the anti-accidental movement key identifier and periodically sends broadcast messages using the configured wireless communication frequency.

[0008] (2) The anti-error host and the anti-error movement key are directly connected, and the operation task generated by the anti-error host based on the current power grid equipment status and operation mode is sent to the anti-error movement key, and then the connection is disconnected;

[0009] (3) When the anti-accidental movement key enters the operation interval, the wireless communication frequency received is switched in rotation at a specified time interval until a broadcast message of the corresponding frequency is received, and an access request message is sent based on this frequency, and the request message carries the identification of the anti-accidental movement key;

[0010] (4) After receiving the request message, the convergence terminal determines whether it is an anti-mistaken movement key that can be accessed by the network through the previously stored anti-mistaken movement key identifier. If yes, it sends a successful request response message to confirm; if not, it sends a failed request response message or does not respond;

[0011] (5) After receiving the successful request response confirmation, the anti-error mobile key confirms access to the comprehensive anti-error wireless online verification network, and can exchange information with the anti-error host through this network; otherwise, it continues to switch the wireless communication frequency point in rotation and finds the corresponding aggregation terminal to apply for access;

[0012] (6) The anti-accidental movement key determines whether the anti-accidental movement key has moved within the interval based on the signal carrying the periodic broadcast message received from the convergence terminal. When it is determined that the anti-accidental movement key has moved within the interval, the anti-accidental movement key uses other stored communication frequencies other than the currently used frequency to search for and re-apply for network access;

[0013] (7) After the anti-error mobile key is connected to the verification network, it interacts with the anti-error host and gradually verifies whether the current substation equipment status information and power grid operation mode are consistent with the simulated rehearsal equipment status information downloaded from the anti-error host. If they are consistent, the unlocking operation is performed in sequence according to the stored operation task sequence; if they are inconsistent, the unlocking operation is performed by re-rehearsing the generated operation task through communication with the anti-error host through the verification network.

[0014] According to certain embodiments of the first aspect, in the step (3), the anti-accidental movement key rotates and switches the wireless communication frequency to receive wireless messages at a specified time interval, including: the anti-accidental movement key uses the first stored wireless communication frequency to start receiving wireless messages, and determines whether the broadcast message sent by the aggregation terminal is received. If the message is received, an access application message is sent at the frequency of the received broadcast message; if the message is not received, it is determined whether the current waiting reception time is greater than the scanning interval time T, and if the scanning interval time T has not been reached, the original frequency point continues to be used to receive wireless messages; if the scanning interval time T has been reached, switching to the next wireless communication frequency point to receive wireless messages until a broadcast message of the corresponding frequency point is received.

[0015] According to certain embodiments of the first aspect, in the step (6), determining whether the anti-accidental movement key has moved in the interval includes: the anti-accidental movement key receives the periodic broadcast messages sent by the convergence terminal in real time, and monitors the wireless signal signal-to-noise ratio and signal strength, and determines whether the signal-to-noise ratio or signal strength is lower than the preset reliable communication signal-to-noise ratio and signal strength preset value; if it is lower than the preset value, it indicates that the anti-accidental movement key has entered other room intervals of the substation.

[0016] In a second aspect, a substation anti-error wireless online verification system includes: an anti-error host, a convergence terminal, and an anti-error mobile key, wherein the anti-error host is configured to: directly connect to the anti-error mobile key, send the operation task generated by the anti-error host according to the current power grid equipment status and operation mode to the anti-error mobile key, and then disconnect;

[0017] The anti-mistaken movement key is configured to: store the communication frequencies used by all aggregation terminals, and when entering the operation interval, rotate and switch the wireless communication frequencies for reception at specified time intervals until the broadcast message of the corresponding frequency can be received, and send an access application message based on this frequency; after receiving the successful request response confirmation, confirm the access to the comprehensive anti-mistaken wireless online verification network, otherwise continue to rotate and switch the wireless communication frequency, and find the corresponding aggregation terminal to apply for access; based on the signal carrying the periodic broadcast message received from the aggregation terminal, judge whether the anti-mistaken movement key moves in the interval, and when it is judged that the movement between the intervals occurs, use other stored communication frequencies except the currently used frequency to find and re-apply for access to the network; and after accessing the verification network, interact with the anti-mistake host, and gradually verify whether the current substation equipment status information and power grid operation mode are consistent with the simulated rehearsal equipment status information downloaded from the anti-mistake host. If they are consistent, the unlocking operation is performed in sequence according to the stored operation task sequence; if they are inconsistent, the unlocking operation is performed by re-rehearsing the generated operation task through the verification network and communication with the anti-mistake host;

[0018] The aggregation terminal is configured to: store the anti-accidental movement key identifier, and use the configured wireless communication frequency to periodically send broadcast messages; after receiving the message requesting access, determine whether it is an anti-accidental movement key that can be accessed by the network through the stored anti-accidental movement key identifier. If so, send a success request response message to confirm; if not, send a failure request response message or do not respond.

[0019] According to certain embodiments of the second aspect, the aggregation terminal is deployed at different operating intervals of the substation according to the wireless communication environment of the substation, and different wireless communication frequencies are used for communication between aggregation terminals at various levels. The aggregation terminal is directly or indirectly connected to the anti-error host.

[0020] According to certain embodiments of the second aspect, the indirect connection between the aggregation terminal and the anti-error host is through the anti-error edge agent and the anti-error host. The anti-error mobile key can access the comprehensive anti-error wireless online verification network with any aggregation terminal, and communicate with the anti-error host through the aggregation terminal and the anti-error edge agent to realize device status verification or simulation rehearsal interaction.

[0021] In a third aspect, an anti-mistaken movement key includes a memory, a processor, and a communication interface, wherein the memory stores communication frequencies used by all convergence terminals, and the processor is configured to:

[0022] Receiving, from the error prevention host via the communication interface, an operation task generated by the error prevention host in advance according to the current power grid equipment state and operation mode;

[0023] receiving, via the communication interface, broadcast messages periodically sent by the convergence terminal;

[0024] When entering the operation interval, the wireless communication frequency point that the communication interface receives is switched in rotation at a specified time interval until the broadcast message of the corresponding frequency point can be received, and the access application message is sent through the communication interface based on this frequency point;

[0025] After receiving a successful request response confirmation from the convergence terminal via the communication interface, confirm access to the comprehensive anti-mistaken wireless online verification network; otherwise, continue to rotate and switch the wireless communication frequency point, and find the corresponding convergence terminal to apply for access. The successful request response is sent by the convergence terminal based on the previously stored anti-mistaken movement key identifier to determine that the anti-mistaken movement key identifier carried in the received request message is an anti-mistaken movement key that can be accessed by the network;

[0026] Based on the signal carrying the periodic broadcast message received from the convergence terminal, it is determined whether the anti-mistaken movement key moves in the interval. When it is determined that the movement between the intervals occurs, other stored communication frequencies other than the currently used frequency are used to find and re-apply for access to the network;

[0027] After accessing the verification network, it interacts with the anti-error host and gradually verifies whether the current substation equipment status information and power grid operation mode are consistent with the simulated rehearsal equipment status information downloaded from the anti-error host. If they are consistent, the unlocking operation is performed in sequence according to the stored operation task sequence; if they are inconsistent, the unlocking operation is performed by communicating with the anti-error host through the verification network and re-rehearsing the generated operation task.

[0028] In a fourth aspect, a convergence terminal includes a memory, a processor, and a communication interface, wherein the memory stores all anti-mistaken movement key identifiers, and the processor is configured to:

[0029] Periodically sending broadcast messages via the communication interface using the configured wireless communication frequency point;

[0030] After receiving a request message from the anti-accidental movement key via the communication interface, determine whether the anti-accidental movement key identifier carried in the request message is an anti-accidental movement key accessible to the network through the stored anti-accidental movement key identifier. If yes, send a successful request response message to confirm via the communication interface; if not, send a failed request response message or do not respond via the communication interface;

[0031] The request message is sent by the anti-mistaken movement key when entering the operation interval, switching the wireless communication frequency point received by its communication interface at a specified time interval until a broadcast message of the corresponding frequency point is received, based on this frequency point;

[0032] The signal carrying the periodic broadcast message is used by the anti-accidental movement key to determine whether the anti-accidental movement key moves in the interval. When it is determined that movement between intervals occurs, the anti-accidental movement key uses other stored communication frequencies except the currently used frequency to search and re-apply for access to the network.

[0033] Beneficial effects: The method and system for wireless access and online verification of comprehensive anti-error mobile keys for substations proposed by the present invention can enable the anti-error mobile keys to communicate with the anti-error host in real time during task execution, verify the current equipment status and power grid operation mode in real time, solve the problem that the equipment status or power grid operation mode changes and the erroneous operation may cause personal or equipment safety accidents, improve the safety of operation and the effectiveness of error prevention, and enhance the intelligent level of error prevention management and control. At the same time, relying on the verification network that supports mobile connections, it can communicate and exchange data with the anti-error host, complete and improve the functions of lock management, ground wire management, unlocking operation control, safety equipment management, etc., expand the secondary error prevention and maintenance error prevention functions, and also include personnel safety access into the system for unified management, forming the anti-error control of the entire business of substation operation and inspection, realizing full error prevention of operation and full process control, and improving the safety control level and operation efficiency of substation operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1It is the network topology structure of the comprehensive anti-error wireless online verification of the present invention;

[0035] Figure 2 It is an overall flow chart of the wireless access and online verification method for preventing mistaken movement of keys of the present invention;

[0036] Figure 3 This is a flow chart of wireless access network for preventing mistaken movement of a key according to the present invention;

[0037] Figure 4 It is a flow chart of the wireless access and online verification method for preventing the key from being moved by mistake in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0039] Figure 1 The topology of the comprehensive anti-error wireless online verification network of the present invention is shown. The comprehensive anti-error wireless online verification network is composed of an anti-error key and multiple convergence terminals. Each convergence terminal is deployed in different operation intervals of the substation according to the wireless communication environment of the substation. In order to prevent communication interference between convergence terminals, different wireless communication frequencies are used for communication between convergence terminals at all levels. Therefore, when the anti-error mobile key enters different interval operations, it is necessary to switch to the frequency of the convergence terminal at the corresponding interval and apply for access with this convergence terminal to maintain the network connection with the convergence terminal. The anti-error key can access the comprehensive anti-error wireless online verification network with any convergence terminal, and communicate with the anti-error host through the convergence terminal and the anti-error edge agent to realize device status verification or simulated rehearsal interaction. In the present invention, the anti-error mobile key is also called an anti-error key or a mobile key, or simply a key, which can be used interchangeably.

[0040] The wireless access process of the anti-mistaken movement key is that the anti-mistaken movement key configures and stores all communication frequencies in the network, and each convergence terminal periodically sends broadcast messages. When the anti-mistaken movement key enters the operation interval, the wireless receiving frequency is switched in rotation at a certain interval until the broadcast message of the corresponding frequency is received, indicating that it is in the correct interval, and an access application message is sent to the convergence terminal. Only after receiving the successful request response confirmation from the convergence terminal, it can actually access the network. During the working process, by detecting the signal-to-noise ratio and signal strength of the periodic broadcast message sent by the anti-mistaken convergence terminal, it can independently determine whether to enter other intervals of the substation, and automatically switch to the corresponding frequency to re-access the network. After accessing the network, by real-time verification of the status information of the circuit breaker, disconnector, grounding switch and other equipment, it is determined whether to perform the unlocking operation in sequence according to the stored operation task sequence, or to re-rehearse the generated operation task for unlocking operation, to ensure personal or equipment safety.

[0041] Reference Figure 2The present invention provides a substation comprehensive anti-mismovement key wireless access and online verification method, comprising the following steps:

[0042] Step S1, initialization: the anti-accidental movement key configures and stores the communication frequencies used by all convergence terminals, the convergence terminal configures and stores the anti-accidental movement key identifier, and uses the configured fixed wireless communication frequency to periodically send broadcast messages.

[0043] Step S2, task issuance: the anti-mistaken movement host is directly connected to the anti-mistaken movement key through a wired method such as Ethernet, and an operation task is generated in advance based on the current power grid equipment status and operation mode, and issued to the anti-mistaken movement key.

[0044] Step S3, apply for access: the operator disconnects the direct connection between the anti-accidental mobile key and the anti-accidental host, carries the anti-accidental mobile key and prepares to enter the on-site operation. The mobile key switches to use the stored wireless communication frequency to receive wireless messages at a certain interval until it can receive the broadcast message of the corresponding frequency, and sends the access application message at this frequency.

[0045] Specifically, refer to Figure 3 After the anti-mistaken mobile key enters the scene, it uses the stored first wireless communication frequency to receive wireless messages, and then determines whether the broadcast message sent by the convergence terminal is received. If the message is received, the mobile key sends an access application message at the frequency of receiving the broadcast message; if the message is not received, it determines whether the current waiting reception time is greater than the scanning interval time T. If the scanning interval time T has not been reached, the mobile key continues to use the original frequency to receive wireless messages, and then determines whether the broadcast message sent by the convergence terminal is received; if the scanning interval time T has been reached, the mobile key switches to use the next wireless communication frequency p2 to receive wireless messages, and then determines whether the broadcast message sent by the convergence terminal is received, until the broadcast message of the corresponding frequency is received.

[0046] Step S4, request response: the convergence terminal receives the mobile key access application message. After receiving the request message, the convergence terminal determines whether it is a mobile key that can be accessed by the network through the stored mobile key identifier. If yes, a successful request response message is sent to confirm; if not, a failed request response message is sent or no response is given;

[0047] Specifically, the convergence terminal determines whether the applied mobile key is accessible through the mobile key identifier carried in the application message. If the mobile key identifier cannot be recognized and is not in the identifier library, the convergence terminal sends a failure request response message or does not respond, and then returns to the operation of determining whether the received message is received in step (3); if the applied mobile key is in the identifier library, it is determined that it is accessible, and the convergence terminal sends a success request response message;

[0048] Step S5, confirm access: after receiving the successful request response confirmation, the anti-mistaken mobile key confirms access to the comprehensive anti-mistaken wireless online verification network, and can interact with the anti-mistaken host through this network; otherwise, continue to switch the wireless communication frequency point in rotation, and find the corresponding aggregation terminal to apply for access according to steps S3, S4, and S5;

[0049] There may be multiple wireless networking networks in the substation. To prevent accidental access to other networks, when the anti-accidental mobile key applies for access, it must receive a response confirmation from the convergence terminal in this interval before confirming the access to the network. Otherwise, it will continue to switch the wireless receiving frequency points in rotation to find the corresponding convergence terminal to apply for access. Through the design of steps S3, S4, and S5, it can ensure that the anti-accidental mobile key correctly accesses the network.

[0050] Step S6, mobility judgment: During the working process, the anti-mistaken mobile key receives the periodic broadcast messages sent by the anti-mistaken convergence terminal in real time, and monitors the wireless signal signal-to-noise ratio and signal strength to determine whether the signal-to-noise ratio or signal strength is lower than the preset reliable communication signal-to-noise ratio or signal strength preset value. If the signal-to-noise ratio is lower than the preset signal-to-noise ratio value, or the signal strength is lower than the preset signal strength value, it means that the anti-mistaken mobile key has entered other room intervals of the substation, and the mobile key uses other stored communication frequencies except the currently used frequency points in accordance with steps S3, S4, and S5 to find and re-apply for access to the network.

[0051] When the key is moved from one interval to another, the wireless communication performance is reduced or the communication is interrupted due to factors such as the obstruction of the room or equipment, and it is necessary to switch to the convergence terminal of the current interval for normal communication. The present invention detects the signal-to-noise ratio and signal strength of the received message to compare the thresholds and judge the intervals of other rooms in the substation, so as to gradually switch and try to receive broadcast messages that meet the requirements of signal-to-noise ratio and signal strength according to the preset frequency points, resend the access application signal, and re-establish the connection with this network after the response, so as to realize the automatic access of the online verification network of the operation interval.

[0052] Step S7, execute verification: after the anti-error mobile key is connected to the verification network, it interacts with the anti-error host to gradually verify whether the current equipment status information such as circuit breakers, disconnectors, earthing switches and the power grid operation mode are consistent with the simulated rehearsal equipment status information downloaded from the anti-error host. If they are consistent, the unlocking operation is performed in sequence according to the stored operation task sequence; if they are inconsistent, the unlocking operation is performed by communicating with the anti-error host through the verification network to re-rehearse the generated operation task.

[0053] Figure 4 The overall process of the wireless access and online verification method for preventing the key from being moved by mistake in one embodiment is shown as follows:

[0054] (1) The anti-accidental movement key configures and stores the communication frequencies used by all converged terminals. The converged terminal stores the anti-accidental movement key identification configuration in the terminal identification library and periodically sends broadcast messages using the configured fixed wireless communication frequency.

[0055] (2) The anti-mistaken movement host is directly connected to the anti-mistaken movement key through a wired method such as Ethernet, and the operation task is generated based on the current power grid equipment status and operation mode, and then sent to the anti-mistaken movement key;

[0056] (3) The operator disconnects the anti-accidental movement key from the anti-accidental movement host, carries the anti-accidental movement key and prepares to enter the site for operation. The mobile key uses the first stored wireless communication frequency point p1 to receive wireless messages;

[0057] (4) The anti-mistaken movement key determines whether the broadcast message sent by the convergence terminal is received. If the message is not received, the process proceeds to step (5). If the message is received, the process proceeds to step (6);

[0058] (5) Determine whether the current waiting reception time is greater than the scanning interval time T. If the scanning interval time T has not been reached, the mobile key continues to use the original frequency point to receive wireless messages, and then enters step (4); if the scanning interval time T has been reached, the mobile key switches to use the next wireless communication frequency point p2 to receive wireless messages, and then enters step (4);

[0059] (6) The mobile key sends an access request message at the frequency at which the broadcast message is received;

[0060] (7) The aggregation terminal receives the mobile key access application message;

[0061] (8) The converged terminal determines whether the applied mobile key is accessible through the mobile key identifier in the application message. If the mobile key identifier cannot be recognized and is not in the identifier library, the converged terminal sends a failed request response message or does not respond, and then proceeds to step (4). If the applied mobile key is in the identifier library, it is determined that it is accessible, and the converged terminal sends a successful request response message, and then proceeds to step (9).

[0062] (9) The anti-mistaken mobile key receives the request response message and successfully confirms access to the comprehensive anti-mistaken wireless online verification network;

[0063] (10) The anti-mistaken movement key determines whether the wireless signal signal-to-noise ratio and signal strength are lower than the preset reliable communication signal-to-noise ratio and signal strength preset value. If the signal-to-noise ratio or signal strength is lower than the preset value, the mobile key switches to use the next wireless communication frequency point p2 to receive the wireless message, and then enters step (4); if the signal-to-noise ratio and signal strength are not lower than the preset value, enter step (11);

[0064] (11) The anti-error movement key is moved to the operation interval to start the anti-error locking operation. First, it interacts with the anti-error host to gradually verify whether the current equipment status information such as circuit breakers, disconnectors, and earthing switches and the power grid operation mode are consistent with the simulated rehearsal equipment status information downloaded from the anti-error host. If they are consistent, the unlocking operation is performed in sequence according to the stored operation task sequence; if they are inconsistent, the operation task is re-rehearsed and generated through the verification network and communication with the anti-error host to perform the unlocking operation.

[0065] According to the method of the present invention, the anti-mistaken movement key independently determines whether to enter other intervals of the substation by detecting the signal-to-noise ratio and signal strength of the periodic broadcast message received from the anti-mistaken convergence terminal, thereby sending access application signals one by one according to the preset frequency until receiving the access application response from the convergence terminal of this interval and accessing this network; when entering from one interval to another, in order to ensure communication reliability, the anti-mistaken movement key needs to switch to another interval convergence terminal for access, thereby realizing seamless access to the online verification network of the operating interval.

[0066] Furthermore, the method also includes: according to the position of the anti-mismovement key access aggregation terminal and the wireless positioning, the operator's operation position is given, and it can be linked with multiple systems such as the access control system and the lock control system to achieve operator tracking and misentry interval alarm.

[0067] According to the above combination Figure 2-Figure 4 The process of the wireless access and online verification method for preventing mistaken movement of the key described above can be understood that in the substation wireless online verification system for preventing mistaken movement of the key provided by the present invention, the functions of the anti-mistaken key include: directly connecting with the anti-mistaken movement key, sending the operation task generated by the anti-mistaken key on the anti-mistaken key in the current power grid equipment state and operation mode preview to the anti-mistaken movement key, and then disconnecting;

[0068] The functions of the anti-mistaken movement key include: storing the communication frequencies used by all aggregation terminals, and when entering the operation interval, rotating and switching the wireless communication frequencies for reception at specified time intervals until the broadcast message of the corresponding frequency can be received, and sending an access application message based on this frequency; after receiving the successful request response confirmation, confirming the access to the comprehensive anti-mistaken wireless online verification network, otherwise continue to rotate and switch the wireless communication frequency, and find the corresponding aggregation terminal to apply for access; based on the signal carrying the periodic broadcast message received from the aggregation terminal, determine whether the anti-mistaken movement key has moved in the interval, and when it is determined that the movement between the intervals occurs, use other stored communication frequencies except the currently used frequency to find and re-apply for access to the network; and after accessing the verification network, interact with the anti-mistake host to gradually verify whether the current substation equipment status information and power grid operation mode are consistent with the simulated rehearsal equipment status information downloaded from the anti-mistake host. If they are consistent, the unlocking operation is performed in sequence according to the stored operation task sequence; if they are inconsistent, the unlocking operation is performed by re-rehearsing the generated operation task through the verification network and communication with the anti-mistake host;

[0069] The functions of the aggregation terminal include: storing the anti-accidental movement key identifier, and periodically sending broadcast messages using the configured wireless communication frequency; after receiving the message requesting access, judging whether it is an anti-accidental movement key that can be accessed by the network through the stored anti-accidental movement key identifier. If so, sending a success request response message for confirmation; if not, sending a failure request response message or not responding.

[0070] The present invention also provides an anti-mismovement key, comprising a memory, a processor, and a communication interface, wherein the memory stores the communication frequency points used by all convergence terminals, and the processor is configured as follows:

[0071] Receiving, from the error prevention host via the communication interface, an operation task generated by the error prevention host in advance according to the current power grid equipment state and operation mode;

[0072] receiving, via the communication interface, broadcast messages periodically sent by the convergence terminal;

[0073] When entering the operation interval, the wireless communication frequency point that the communication interface receives is switched in rotation at a specified time interval until the broadcast message of the corresponding frequency point can be received, and the access application message is sent through the communication interface based on this frequency point;

[0074] After receiving a successful request response confirmation from the convergence terminal via the communication interface, confirm access to the comprehensive anti-mistaken wireless online verification network; otherwise, continue to rotate and switch the wireless communication frequency point, and find the corresponding convergence terminal to apply for access. The successful request response is sent by the convergence terminal based on the previously stored anti-mistaken movement key identifier to determine that the anti-mistaken movement key identifier carried in the received request message is an anti-mistaken movement key that can be accessed by the network;

[0075] Based on the signal carrying the periodic broadcast message received from the convergence terminal, it is determined whether the anti-mistaken movement key moves in the interval. When it is determined that the movement between the intervals occurs, other stored communication frequencies other than the currently used frequency are used to find and re-apply for access to the network;

[0076] After accessing the verification network, it interacts with the anti-error host and gradually verifies whether the current substation equipment status information and power grid operation mode are consistent with the simulated rehearsal equipment status information downloaded from the anti-error host. If they are consistent, the unlocking operation is performed in sequence according to the stored operation task sequence; if they are inconsistent, the unlocking operation is performed by communicating with the anti-error host through the verification network and re-rehearsing the generated operation task.

[0077] The present invention also provides a convergence terminal, comprising a memory, a processor, and a communication interface, wherein the memory stores all anti-mistaken movement key identifiers, and the processor is configured to:

[0078] Periodically sending broadcast messages via the communication interface using the configured wireless communication frequency point;

[0079] After receiving a request message from the anti-accidental movement key via the communication interface, determine whether the anti-accidental movement key identifier carried in the request message is an anti-accidental movement key accessible to the network through the stored anti-accidental movement key identifier. If yes, send a successful request response message to confirm via the communication interface; if not, send a failed request response message or do not respond via the communication interface;

[0080] The request message is sent by the anti-mistaken movement key when entering the operation interval, switching the wireless communication frequency point received by its communication interface at a specified time interval until a broadcast message of the corresponding frequency point is received, based on this frequency point;

[0081] The signal carrying the periodic broadcast message is used by the anti-accidental movement key to determine whether the anti-accidental movement key moves in the interval. When it is determined that movement between intervals occurs, the anti-accidental movement key uses other stored communication frequencies except the currently used frequency to search and re-apply for access to the network.

[0082] Compared with the traditional system, the present invention builds a wireless online verification network for substation error prevention, and establishes a local real-time communication channel between the error prevention host and the error prevention mobile key. Therefore, the operator can obtain changes in the power grid operation mode, power grid data and coordination instructions from the error prevention host through the error prevention mobile key.

[0083] According to the present invention, the anti-error mobile key can communicate with the anti-error host in real time during the task execution process, and check the current equipment status and power grid operation mode in real time, so as to solve the problem that the equipment status or power grid operation mode changes and the misoperation may cause personal or equipment safety accidents, improve the safety of operation and the effectiveness of anti-error, and improve the intelligent level of anti-error management and control. In addition, after the anti-error mobile key is connected to the convergence terminal, it can rely on the verification network supporting mobile connection to communicate and exchange data with the anti-error host, realize data sharing and business collaboration, complete and improve the functions of lock management, ground wire management, unlocking operation control, safety equipment management, etc., expand the secondary anti-error and maintenance anti-error functions, and also include personnel safety access into the system for unified management, forming the anti-error control of the whole business of substation operation and inspection, realizing full anti-error operation and full process control, and improving the safety control level and operation efficiency of substation operation.

Claims

1. A method for wireless access and online verification of a substation anti-mistaken mobile key, applied to a substation anti-mistaken wireless online verification network including an anti-mistaken host, an anti-mistaken mobile key and a convergence terminal, characterized in that: The method comprises the following steps: (1) The anti-accidental movement key configures and stores the communication frequencies used by all aggregation terminals. The aggregation terminal configures and stores the anti-accidental movement key identifier and periodically sends broadcast messages using the configured wireless communication frequency. (2) The anti-error host and the anti-error movement key are directly connected, and the operation task generated by the anti-error host based on the current power grid equipment status and operation mode is sent to the anti-error movement key, and then the connection is disconnected; (3) When the anti-accidental movement key enters the operation interval, the wireless communication frequency received is switched in rotation at a specified time interval until a broadcast message of the corresponding frequency is received, and an access request message is sent based on this frequency, and the request message carries the identification of the anti-accidental movement key; (4) After receiving the request message, the convergence terminal determines whether it is an anti-mistaken movement key that can be accessed by the network through the previously stored anti-mistaken movement key identifier. If yes, it sends a successful request response message to confirm; if not, it sends a failed request response message or does not respond; (5) After receiving the successful request response confirmation, the anti-error mobile key confirms access to the comprehensive anti-error wireless online verification network, and can exchange information with the anti-error host through this network; otherwise, it continues to switch the wireless communication frequency point in rotation and finds the corresponding aggregation terminal to apply for access; (6) The anti-accidental movement key determines whether the anti-accidental movement key has moved within the interval based on the signal carrying the periodic broadcast message received from the convergence terminal. When it is determined that the anti-accidental movement key has moved within the interval, the anti-accidental movement key uses other stored communication frequencies other than the currently used frequency to search for and re-apply for network access; (7) After the anti-error mobile key is connected to the verification network, it interacts with the anti-error host and gradually verifies whether the current substation equipment status information and power grid operation mode are consistent with the simulated rehearsal equipment status information downloaded from the anti-error host. If they are consistent, the unlocking operation is performed in sequence according to the stored operation task sequence; if they are inconsistent, the unlocking operation is performed by re-rehearsing the generated operation task through communication with the anti-error host through the verification network.

2. The method according to claim 1, characterized in that: In the step (3), the anti-accidental movement key switches the wireless communication frequency point at a specified time interval to receive the wireless message, including: the anti-accidental movement key uses the first stored wireless communication frequency point to start receiving the wireless message, and determines whether the broadcast message sent by the convergence terminal is received. If the message is received, the access application message is sent at the frequency point for receiving the broadcast message; if the message is not received, it is determined whether the current waiting reception time is greater than the scanning interval time T, and if the scanning interval time T is not reached, the original frequency point continues to be used to receive the wireless message; if the scanning interval time T is reached, the next wireless communication frequency point is switched to receive the wireless message until the broadcast message of the corresponding frequency point is received.

3. The method according to claim 1, characterized in that In the step (6), judging whether the anti-accidental movement key has moved in the interval includes: the anti-accidental movement key receives the periodic broadcast message sent by the convergence terminal in real time, and monitors the wireless signal signal-to-noise ratio and signal strength, and judges whether the signal-to-noise ratio or signal strength is lower than the preset reliable communication signal-to-noise ratio and signal strength preset value. If it is lower than the preset value, it indicates that the anti-accidental movement key has entered the interval of other rooms in the substation.

4. A wireless online verification system for preventing errors in substations, comprising: The anti-error host, the convergence terminal and the anti-error movement key are characterized in that the anti-error host is configured to: directly connect with the anti-error movement key, send the operation task generated by the anti-error host according to the current power grid equipment status and operation mode to the anti-error movement key, and then disconnect; The anti-mistaken movement key is configured to: store the communication frequencies used by all aggregation terminals, and when entering the operation interval, rotate and switch the wireless communication frequencies for reception at specified time intervals until the broadcast message of the corresponding frequency can be received, and send an access application message based on this frequency; after receiving the successful request response confirmation, confirm the access to the comprehensive anti-mistaken wireless online verification network, otherwise continue to rotate and switch the wireless communication frequency, and find the corresponding aggregation terminal to apply for access; based on the signal carrying the periodic broadcast message received from the aggregation terminal, judge whether the anti-mistaken movement key moves in the interval, and when it is judged that the movement between the intervals occurs, use other stored communication frequencies except the currently used frequency to find and re-apply for access to the network; and after accessing the verification network, interact with the anti-mistake host, and gradually verify whether the current substation equipment status information and power grid operation mode are consistent with the simulated rehearsal equipment status information downloaded from the anti-mistake host. If they are consistent, the unlocking operation is performed in sequence according to the stored operation task sequence; if they are inconsistent, the unlocking operation is performed by re-rehearsing the generated operation task through the verification network and communication with the anti-mistake host; The aggregation terminal is configured to: store the anti-accidental movement key identifier, and use the configured wireless communication frequency to periodically send broadcast messages; after receiving the message requesting access, determine whether it is an anti-accidental movement key that can be accessed by the network through the stored anti-accidental movement key identifier. If so, send a success request response message to confirm; if not, send a failure request response message or do not respond.

5. The system according to claim 4, characterized in that The aggregation terminal is deployed at different operation intervals of the substation according to the wireless communication environment of the substation, and different wireless communication frequencies are used for communication between aggregation terminals at all levels. The aggregation terminal is directly or indirectly connected to the anti-error host.

6. The system according to claim 5, characterized in that The indirect connection between the aggregation terminal and the anti-error host is through the anti-error edge agent. The anti-error mobile key can access the comprehensive anti-error wireless online verification network with any aggregation terminal, and communicate with the anti-error host through the aggregation terminal and the anti-error edge agent to realize device status verification or simulation rehearsal interaction.

7. The system according to claim 4, characterized in that The anti-accidental movement key rotates and switches the wireless communication frequency to receive wireless messages at specified time intervals, including: the anti-accidental movement key uses the first stored wireless communication frequency to start receiving wireless messages, and determines whether a broadcast message sent by the aggregation terminal is received. If the message is received, an access application message is sent at the frequency of the received broadcast message; if the message is not received, it is determined whether the current waiting reception time is greater than the scanning interval time T, and if the scanning interval time T has not been reached, the original frequency point continues to be used to receive wireless messages; if the scanning interval time T has been reached, the next wireless communication frequency point is switched to receive wireless messages until a broadcast message of the corresponding frequency point is received.

8. The system according to claim 4, characterized in that The anti-accidental movement key determines whether the anti-accidental movement key has moved in the interval, including: the anti-accidental movement key receives the periodic broadcast message sent by the convergence terminal in real time, and monitors the wireless signal signal-to-noise ratio and signal strength, and determines whether the signal-to-noise ratio or signal strength is lower than the preset reliable communication signal-to-noise ratio and signal strength preset value. If it is lower than the preset value, it indicates that the anti-accidental movement key has entered other room intervals of the substation.

9. A key for preventing accidental movement, characterized in that: The system comprises a memory, a processor and a communication interface, wherein the memory stores the communication frequency points used by all converged terminals, and the processor is configured to: Receiving, from the error prevention host via the communication interface, an operation task generated by the error prevention host in advance according to the current power grid equipment state and operation mode; receiving, via the communication interface, broadcast messages periodically sent by the convergence terminal; When entering the operation interval, the wireless communication frequency point that the communication interface receives is switched in rotation at a specified time interval until the broadcast message of the corresponding frequency point can be received, and the access application message is sent through the communication interface based on this frequency point; After receiving a successful request response confirmation from the convergence terminal via the communication interface, confirm access to the comprehensive anti-mistaken wireless online verification network; otherwise, continue to rotate and switch the wireless communication frequency point, and find the corresponding convergence terminal to apply for access. The successful request response is sent by the convergence terminal based on the previously stored anti-mistaken movement key identifier to determine that the anti-mistaken movement key identifier carried in the received request message is an anti-mistaken movement key that can be accessed by the network; Based on the signal carrying the periodic broadcast message received from the convergence terminal, it is determined whether the anti-mistaken movement key moves in the interval. When it is determined that the movement between the intervals occurs, other stored communication frequencies other than the currently used frequency are used to find and re-apply for access to the network; After accessing the verification network, it interacts with the anti-error host to gradually verify whether the current substation equipment status information and power grid operation mode are consistent with the simulated preview equipment status information downloaded from the anti-error host. If they are consistent, the unlocking operation is performed in sequence according to the stored operation task sequence; If there is any inconsistency, the unlocking operation is performed by re-rehearsing and generating the operation task through the verification network and communication with the anti-error host.

10. A convergence terminal, characterized in that: The system comprises a memory, a processor and a communication interface, wherein the memory stores all anti-mistaken movement key identifiers, and the processor is configured to: Periodically sending broadcast messages via the communication interface using the configured wireless communication frequency point; After receiving a request message from the anti-accidental movement key via the communication interface, determine whether the anti-accidental movement key identifier carried in the request message is an anti-accidental movement key accessible to the network through the stored anti-accidental movement key identifier. If yes, send a successful request response message to confirm via the communication interface; if not, send a failed request response message or do not respond via the communication interface; The request message is sent by the anti-mistaken movement key when entering the operation interval, switching the wireless communication frequency point received by its communication interface at a specified time interval until a broadcast message of the corresponding frequency point is received, based on this frequency point; The signal carrying the periodic broadcast message is used by the anti-accidental movement key to determine whether the anti-accidental movement key moves in the interval. When it is determined that movement between intervals occurs, the anti-accidental movement key uses other stored communication frequencies except the currently used frequency to search and re-apply for access to the network.

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