Relay protection remote control system and method based on message combined file double check

Abstract

The invention relates to the technical field of power grid control, in particular to a relay protection remote control system and a relay protection remote control method based on message combined file double check, comprising: a master station EMS module, the master station EMS module performing remote operation on soft pressing plate switching, fixed value area switching and signal resetting of a relay protection device through a telecontrol channel; a master station information protection module; a transformer substation telecontrol module; a transformer station protection information sub-station module; a relay protection device; through the cooperation of the main station EMS module, the main station protection information module, the transformer substation telecontrol module, the transformer substation protection information substation module and the relay protection device, the accuracy and reliability of relay protection remote operation can be ensured, so that safe and stable operation of a power grid is effectively ensured, and meanwhile, due to the realization of remote operation, the safety of the power grid is improved. According to the method, the workload of operation and maintenance personnel can be greatly reduced, the working efficiency is improved, and in addition, the operation accuracy and safety can be further improved and the operation and maintenance cost can be reduced through a message and file combined double-check mode.

Description

Technical Field

[0001] The present invention belongs to the technical field of power grid control, and in particular relates to a relay protection remote control system and method based on message-combined file double verification. Background Art

[0002] Remote control of relay protection is an important function in the power system. It uses remote equipment and communication equipment to remotely operate the circuit breakers in power plants and substations. At present, the remote control method of relay protection is usually to use remote tripping protection. When an overvoltage or line fault occurs in the ultra-high voltage power grid, the protection on this side trips and the remote tripping protection of the protection on this side is activated at the same time. A signal is sent to the opposite side through a high-frequency channel, causing the circuit breaker on the opposite side to trip and lock its reclosing switch. However, since remote tripping protection relies on a dedicated channel to transmit tripping instructions, the quality and reliability of the channel directly affect the performance of the protection. Once the channel fails or is interrupted, the remote tripping function will fail and manual intervention will be required, affecting the efficiency of relay protection and increasing its operation and maintenance costs. Therefore, we need to propose a relay protection remote control system and method based on message combined with file double verification to solve the above-mentioned problems, so that it can realize remote operation of relay protection, ensure safe and stable operation of the power grid, effectively improve work efficiency, and reduce operation and maintenance costs. Summary of the invention

[0003] In view of the above problems, the present invention provides a relay protection remote control system based on message combined with file double verification, including: a master station EMS module, the master station EMS module remotely operates the soft pressure plate throwing and withdrawing, setting zone switching and signal reset of the relay protection device through the remote control channel; A master station security module, which realizes remote operation of setting value modification of relay protection device through a security channel, and the master station EMS module is electrically connected to the master station security module; The substation telecontrol module is used to correctly and completely forward the relevant remote operation instructions issued by the master station EMS module to the controlled relay protection device; Substation security substation module, which is used to correctly and completely forward the relevant remote operation instructions issued by the main station security module to the controlled relay protection device; A relay protection device, wherein the relay protection device is used to protect the stable operation of the power system; The master station EMS module is electrically connected to the substation telecontrol module, the master station security module is electrically connected to the substation security substation module, and both the substation telecontrol module and the substation security substation module are electrically connected to the relay protection device.

[0004] Furthermore, the process of the master station EMS module performing the soft pressure plate operation on the relay protection device through the telecontrol channel includes a selection process, an execution process and a cancellation process, wherein the selection process is: the master station EMS module sends a remote control selection command to the substation telecontrol module, the object is the soft pressure plate entry to be remotely controlled, and the target value is the soft pressure plate target value. After receiving the remote control selection command, the substation telecontrol module returns a remote control selection return message to the master station EMS module: The execution process is as follows: the master station EMS module sends a remote control execution command to the substation telecontrol module. After receiving the remote control execution command, the substation telecontrol module returns a remote control execution result response to the master station EMS module. The cancellation process is as follows: the master station EMS module sends a remote control cancellation command to the substation telecontrol module, and the substation telecontrol module returns a remote control cancellation result response to the master station EMS module after receiving the remote control cancellation command.

[0005] Furthermore, the master station EMS module switches the setting zone of the relay protection device through the telecontrol channel as follows: A1. The master station EMS module constructs the remote adjustment setting point command message according to the DL / T634.5104 protocol; A2. The master station EMS module sends the constructed remote adjustment setting point command message to the corresponding relay protection device through the telecontrol channel; A3. After receiving the message, the relay protection device parses and verifies the message; A4. If the verification is passed, the relay protection device performs the setting zone switching operation, and the relay protection device switches its own operating setting zone to the setting zone number specified in the message; during the switching process, the relevant parameters will be updated and reconfigured to adapt to the new setting zone setting; A5. After the relay protection device completes the switching of the set value zone, it returns the remote adjustment set point command execution result message to the master station EMS module; the execution result message contains information on whether the switching is successful. If successful, the master station EMS module confirms that the set value zone switching operation is completed; if failed, the master station EMS module performs further analysis and processing based on the returned error information.

[0006] Furthermore, when the master station EMS module remotely operates the reset signal of the relay protection device through the telecontrol channel, the reset operation includes a reset selection process and a reset execution process, wherein the reset selection process is that the master station EMS module sends a remote control command with selection to the substation telecontrol module, and the substation telecontrol module returns a remote control selection result response to the master station EMS module after receiving the selected remote control instruction; the reset execution process is that the master station EMS module sends a remote control command with execution to the substation telecontrol module, and the substation telecontrol module returns a remote control execution result response to the master station EMS module after receiving the executed remote control instruction.

[0007] Furthermore, the remote operation of modifying the set value of the relay protection device by the master station security module includes the control process of reading the set value of any area, the control process of modifying the set value of the non-operating set value area, and the control process of modifying the set value of the operating set value area.

[0008] Furthermore, the control flow for reading the set value of any area is as follows: B11. The operator sends a command to read the set value to the master station security module according to the relevant identification information of the relay protection device whose set value is to be read and the designated set value zone number. The master station security module constructs a request message for reading the set value of any zone according to the command information and the established communication protocol format, and then sends the request message to the substation security substation module through the security channel; B12. After receiving the read setting request message from the master station security module, the substation security module verifies the message to check whether there is any problem with the message format, such as whether it is correct or whether there is any transmission error. If the verification is correct, the read setting request message is forwarded intact to the corresponding relay protection device; if a problem is found in the message, an error prompt message is returned to the master station security module to inform it of the abnormal forwarding; B13. After receiving the request message for reading the set value, the relay protection device first verifies the legitimacy of the request message to confirm that it comes from the authorized master station and meets its own communication requirements. After the verification is passed, the relay protection device extracts the corresponding set value data from its own corresponding storage area according to the set value area number specified in the request message, organizes and encapsulates the set value data in accordance with the communication protocol requirements, forms a set value response message that can be returned, and then sends the set value response message back to the substation security substation module through the intra-station link; B14. After receiving the fixed value response message sent back by the relay protection device, the substation security substation module will perform integrity and accuracy verification of the fixed value response message again to ensure that there is no error in the data during the transmission process within the station. After passing the verification, the fixed value response message will be forwarded back to the main station security module through the security channel; B15. After the main station security module receives the fixed value response message forwarded back by the substation security module, it parses the fixed value response message according to the communication protocol, extracts the fixed value data contained therein, and displays the fixed value data on the operation interface.

[0009] Furthermore, the control flow of modifying the fixed value of the non-operating fixed value area is as follows: B21, the master station security module generates a fixed value modification message according to the detailed information of the relay protection device to be modified, the target non-operational fixed value zone number and the specific new fixed value content, and then sends the fixed value modification message to the substation security substation module through the security channel; B22. After receiving the fixed value modification message from the main station security module, the substation security module verifies the fixed value modification message. The verification content includes whether the fixed value modification message is compliant and whether the data verification code is correct. If the verification passes, the fixed value modification message is forwarded to the relay protection device. If the verification fails, the fixed value modification message with the specific error reason is returned to the main station security module, and the module is informed that the request cannot be executed. B23. After receiving the setting value modification request message, the relay protection device also verifies the legitimacy of the message. After confirming that it is correct, it extracts the new setting value data in the message and writes it into the corresponding non-operation setting value area; B24. After the setting value is updated, the relay protection device will generate a setting value modification result feedback message, which will indicate whether the setting value modification is successful. If successful, the corresponding success flag will be set, and some simple operation record information will be attached; if failed, the cause of the failure will be explained in detail in the setting value modification result feedback message. Subsequently, the relay protection device will send the setting value modification result feedback message to the substation security substation module through the intra-station link; B25. After the substation security substation module receives the fixed value modification result feedback message from the relay protection device, it verifies the fixed value modification result feedback message and forwards it back to the main station security module. After the main station security module receives the fixed value modification result feedback message, it determines whether the fixed value modification operation is successful based on the content in the fixed value modification result feedback message. If successful, the operator is prompted that the modification is completed and the relevant fixed value record information is updated; if failed, the specific reason for failure is displayed to the operator.

[0010] Furthermore, the control flow of modifying the set value of the running set value area is as follows: B31. After the operator initiates the operation instruction to modify the set value of the operation set value area in the master station security module, the master station security module first evaluates the current operation status of the entire power system to determine whether the conditions for switching the operation set value area are met, and at the same time determines the information of the target set value area number to be switched to. After confirmation, the master station security module constructs the pre-request message for switching the operation set value area according to the communication protocol, and sends the message to the substation security substation module through the security channel; B32. After receiving the pre-request message, the substation security substation module verifies the pre-request message and forwards it to the relay protection device after passing the verification. After receiving the pre-request message, the relay protection device conducts a comprehensive check on its current operating status to determine whether it really meets the conditions for switching the operating setting zone. If the conditions are met, the relay protection device performs the corresponding locking operation and then returns a confirmation message to the substation security substation module to allow switching; if the conditions are not met, a message not allowing switching is returned with detailed reasons; B33. After receiving the confirmation message of switching permission returned by the relay protection device, the substation security module forwards it back to the main station security module. After receiving the confirmation message of switching permission, the main station security module organizes the new set value data that has been strictly verified and formatted into a set value modification message, and sends it to the substation security module through the security channel. The substation security module then forwards it to the relay protection device. After receiving the new set value data, the relay protection device starts to write it into the original operation set value area; B34. After the switching of the operating setting zone is completed, the relay protection device performs the unlocking operation, restores the relevant protection function export settings that were locked before switching the setting zone, and generates a feedback message containing the setting value modification success and unlocking completion information, which is sent to the substation security substation module through the intra-station link. The substation security substation module forwards it to the main station security module after verification; B35. After receiving the feedback message, the main station security module confirms that the operating setting area has been successfully modified and the relevant protection functions have been restored to normal, updates the operating setting information and device status information of the relay protection device recorded in itself, and prompts the operator on the operation interface that the operation is successful. At the same time, the data involved in the entire operation process is stored and archived.

[0011] Furthermore, the substation telecontrol module forwards the remote operation instruction issued by the master station EMS module as follows: C1. Receive the remote operation command issued by the master station EMS module through the remote control channel, and use the verification formula to verify the remote operation command. The verification formula is as follows: ,in, is the generating polynomial, M(x) is the information polynomial, and n is the generating polynomial The number of times, k is the number of times M(x), is the remainder polynomial; C2: If the verification fails, an error message is sent to the master station EMS module, requesting to resend the instruction; if the verification passes, enter C3; C3. Parse the passed instructions and extract key information, including operation object, operation type and related parameters, and pre-process the instructions according to the key information; C4. According to the operation object information obtained by parsing, the pre-processed instructions are accurately forwarded to the corresponding controlled relay protection device; C5. After the relay protection device completes the operation, it will feed back the operation result to the substation telecontrol module; C6. Record the operation results and related process information in a local log file or database; at the same time, generate a corresponding report based on the operation results and feed it back to the master station EMS module through the remote control channel to inform it whether the operation is successful and related detailed information.

[0012] Based on the above-described relay protection remote control system based on message combined with file double check, the present invention also provides a relay protection remote control method based on message combined with file double check, comprising the following steps: S1. The master station EMS module or the master station security module generates a remote operation command and sends it to the substation through the telecontrol channel or the security channel; S2, the substation telecontrol module or substation security substation module receives the command and performs preliminary message analysis and verification; after the verification is passed, the command is forwarded to the controlled relay protection device; S3. The relay protection device receives the command and performs a secondary check at the message level to ensure the correctness of the command; S4. For remote operation of setting value modification, the master station security module generates a file containing detailed setting value information and sends it to the substation security module through the security channel; S5. The substation security substation module receives the file and performs integrity check and format check on the file. After the check passes, the file is forwarded to the controlled relay protection device; S6. The relay protection device receives the file and performs a secondary check at the file level. The secondary check at the file level includes the correctness and completeness of the file content and whether it is consistent with the current system status; S7. After the message and the file are verified, the relay protection device executes the remote operation command, which includes soft pressure plate input and output, setting zone switching, signal reset or setting value modification; S8. During the execution process, the relay protection device needs to perform real-time status monitoring and fault detection to ensure the safety and effectiveness of the operation; S9. After the relay protection device completes the operation, it sends the operation result feedback to the substation protection substation module or the substation telecontrol module; S10, the substation security substation module or the substation telecontrol module receives the feedback and performs corresponding processing or recording; S11. The master station EMS module or the master station security module confirms whether the remote operation is successfully completed based on the feedback result.

[0013] The beneficial effects of the present invention are: The present invention can ensure the accuracy and reliability of remote operation of relay protection through the cooperation of the master station EMS module, the master station security module, the substation telecontrol module, the substation security substation module and the relay protection device, thereby effectively ensuring the safe and stable operation of the power grid. At the same time, since remote operation is realized, the workload of operation and maintenance personnel can be greatly reduced and work efficiency can be improved. In addition, through the method of double verification of messages and files, the accuracy and safety of operations can be further improved, and the operation and maintenance costs can be reduced.

[0014] The present invention, through the setting of the master station security module, can realize remote operation of setting modification of the relay protection device through the security channel. Setting modification is an important means of adjusting the function of the relay protection device, which can ensure that the device can still provide effective protection when the power system changes.

[0015] The present invention can perform remote operations such as soft pressure plate activation and deactivation, setting zone switching and signal reset on the relay protection device through the remote control channel by setting the EMS module of the master station.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of a control system according to an embodiment of the present invention is shown; Figure 2 A flowchart of switching the setting zone of a relay protection device according to an embodiment of the present invention is shown; Figure 3 A control flow chart of reading a fixed value of any region according to an embodiment of the present invention is shown; Figure 4 It shows a flowchart of the substation telecontrol module forwarding the remote operation instruction issued by the master station EMS module according to an embodiment of the present invention; Figure 5 A flow chart of a control method according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The embodiment of the present invention provides a relay protection remote control system based on message combined with file double verification, such as Figure 1-4 As shown, it includes a master station EMS module, a master station security module, a substation telecontrol module, a substation security substation module and a relay protection device, the master station EMS module is electrically connected to the master station security module, the master station EMS module is electrically connected to the substation telecontrol module, the master station security module is electrically connected to the substation security substation module, and the substation telecontrol module and the substation security substation module are both electrically connected to the relay protection device; the master station EMS module and the substation telecontrol module adopt the DL / T634.5104 protocol Or the general classification service of the Ethernet version of the DL / T634.5101 protocol, the set value service of the DL / T860 protocol is adopted between the substation telecontrol module and the relay protection device, the set value service of the DL / T860 protocol is adopted between the master station security module and the substation security substation module, the set value service of the DL / T860 protocol is adopted between the substation security substation module and the relay protection device, the direct control service of the DL / T860 protocol or the general command service of the substation 103 protocol is adopted between the substation telecontrol module and the relay protection device.

[0021] The master station EMS module remotely operates the soft pressure plate of the relay protection device, switching of the setting zone and signal reset through the remote control channel; The process of the master station EMS module performing the soft pressure plate operation on the relay protection device through the telecontrol channel includes a selection process, an execution process and a cancellation process, wherein the selection process is: the master station EMS module sends a remote control selection command to the substation telecontrol module, the object is the soft pressure plate entry to be remotely controlled, the target value is the soft pressure plate target value, the substation telecontrol module sends a control command to the relay protection device as SBOw_req[FC=C0], after receiving the remote control selection command, the substation telecontrol module returns a remote control selection return message to the master station EMS module, and the substation telecontrol module sends a control command to the relay protection device as SBOw_rsp[FC=C0]: The execution process is as follows: the master station EMS module sends a remote control execution command to the substation telecontrol module, and the substation telecontrol module sends a control command to the relay protection device as oper[FC=CO]. After receiving the remote control execution command, the substation telecontrol module returns a remote control execution result response to the master station EMS module, and the substation telecontrol module sends a control command to the relay protection device as oper_rsp[FC=C0]. The cancellation process is as follows: the master station EMS module sends a remote control cancellation command to the substation telecontrol module, and the substation telecontrol module sends a control command to the relay protection device as cancel[FC=CO]. After receiving the remote control cancellation command, the substation telecontrol module returns a remote control cancellation result response to the master station EMS module, and the substation telecontrol module sends a control command to the relay protection device as cancel_rsp[FC=CO]. like Figure 2 As shown, the master station EMS module switches the setting zone of the relay protection device through the telecontrol channel as follows: A1. The master station EMS module constructs the remote adjustment set point command message according to the DL / T634.5104 protocol; the message type uses the set scaled value type (i.e. C_SE_NA_1 or C_SE_NB_1 or C_SE_NC_1); The remote adjustment set point command message is constructed through the setting group control block. The related attributes of the setting group control block are described as follows: A11, NumOfSG: number of setting groups, the number of setting areas used by the relay protection device is a parameter of the device and is not allowed to be set or modified; A12, ActSG: active setting group, the activated setting area code, that is, the current setting area code. The client uses the GetSGValues ​​operation to obtain the current setting area code from the device, and also uses the SelectActiveSG operation to re-assign a new activated setting area code (that is, switch setting area operation). The value range of the current setting area code starts from 1; A13. EditSG: edit setting group, the set value area code to be edited, that is, the set value area code currently being modified. The client uses SetSGValues ​​or GetSGValues ​​to operate it. When the relay protection device is powered on, the edit set value area code field EditSG should be initialized to 0, and the value range of the current set value area ActSG field must correspond to 1. Area 0 means that modification of the set value is not allowed at present.

[0022] A14. CnfEdit: confirm editing, confirm the operation of editing the set value.

[0023] A15, LActTm: last activation time, the time when the client last performed SelectActiveSG (select and activate the fixed value area code, that is, switch the fixed value area) operation.

[0024] Different relay protection devices in the station are distinguished by the information object address in the DL / T634.5104 protocol. This information object address uniquely identifies each relay protection device. The set value is the fixed value zone code of the relay protection device. That is, the master station determines the fixed value zone code to be switched to according to the actual operation requirements and puts it into the message. The DL / T634.5104 protocol has flexible expansion performance. For substations that comply with the DL / T860 standard, the substation telecontrol module realizes the mutual compatible conversion of service models: a) When the substation telecontrol module is initialized, the model file of the device shall be preprocessed, obtained and saved. The saved content includes the information of numOfSGs, and the range of the fixed value area that can be used by the device is obtained through numOfSGs; b) After receiving the switching selection command from the master station MES module, the substation telecontrol module performs a rationality check on the target setting area code issued by the master station. If the target setting area code is reasonable, the substation telecontrol module uses the SelectActiveSG service to write the target setting area code into the current setting area code field ActSG in the device SGCB setting group control block; c) The relay protection device receives the SelectActiveSG command from the substation telecontrol module to select the activation setting group and performs the setting area switching operation. If the switching operation is successful, the SelectActiveSG service is used to send an affirmative message; if the switching operation fails, the SelectActiveSG service is used to send a negative message and give an error code.

[0025] A2. The master station EMS module sends the constructed remote adjustment setting point command message to the corresponding relay protection device through the telecontrol channel; A3. After receiving the message, the relay protection device parses and verifies the message; The process of parsing and verifying the message is as follows: first check whether the message format complies with the requirements of DL / T634.5104 protocol, including whether the information object address corresponds to itself, whether the message type is correct, etc., and then perform a legality check on the set value (fixed value area code) to ensure that the received fixed value area code is within the fixed value area range supported by the relay protection device; A4. If the verification is passed, the relay protection device performs the setting zone switching operation, and the relay protection device switches its own operating setting zone to the setting zone number specified in the message; during the switching process, the relevant parameters will be updated and reconfigured to adapt to the new setting zone setting; A5. After the relay protection device completes the switching of the set value zone, it returns the remote adjustment set point command execution result message to the master station EMS module; the execution result message contains information on whether the switching is successful. If successful, the master station EMS module confirms that the set value zone switching operation is completed; if failed, the master station EMS module performs further analysis and processing based on the returned error information.

[0026] When the master station EMS module remotely resets the signal of the relay protection device through the telecontrol channel, it means that the master station EMS module resets the signal of the controlled relay protection device remotely at a different location. The reset operation includes a reset selection process and a reset execution process. The reset selection process is that the master station EMS module sends a remote control command with selection to the substation telecontrol module, and the substation telecontrol module returns the remote control selection result response to the master station EMS module after receiving the selected remote control instruction; the reset execution process is that the master station EMS module sends a remote control command with execution to the substation telecontrol module, and the substation telecontrol module returns the remote control execution result response to the master station EMS module after receiving the executed remote control instruction.

[0027] The master station security module realizes remote operation of setting value modification of relay protection device through security channel; The remote operation of the master station security module to modify the set value of the relay protection device includes the control process of reading the set value of any area, the control process of modifying the set value of the non-operating set value area, and the control process of modifying the set value of the operating set value area, wherein, Figure 3 As shown in the figure, the control flow of reading the set value of any area is as follows: B11. The operator sends a command to read the set value to the master station security module according to the relevant identification information of the relay protection device whose set value is to be read and the designated set value zone number. The master station security module constructs a request message for reading the set value of any zone according to the command information and the established communication protocol format, and then sends the request message to the substation security substation module through the security channel; B12. After receiving the read setting request message from the master station security module, the substation security module verifies the message to check whether there is any problem with the message format, such as whether it is correct or whether there is any transmission error. If the verification is correct, the read setting request message is forwarded intact to the corresponding relay protection device; if a problem is found in the message, an error prompt message is returned to the master station security module to inform it of the abnormal forwarding; B13. After receiving the request message for reading the set value, the relay protection device first verifies the legitimacy of the request message to confirm that it comes from the authorized master station and meets its own communication requirements. After the verification is passed, the relay protection device extracts the corresponding set value data from its own corresponding storage area according to the set value area number specified in the request message, organizes and encapsulates the set value data in accordance with the communication protocol requirements, forms a set value response message that can be returned, and then sends the set value response message back to the substation security substation module through the intra-station link; B14. After receiving the fixed value response message sent back by the relay protection device, the substation security substation module will perform integrity and accuracy verification of the fixed value response message again to ensure that there is no error in the data during the transmission process within the station. After passing the verification, the fixed value response message will be forwarded back to the main station security module through the security channel; B15. After the main station security module receives the fixed value response message forwarded back by the substation security module, it parses the fixed value response message according to the communication protocol, extracts the fixed value data contained therein, and displays the fixed value data on the operation interface, so that the operator can view, analyze or store it in the corresponding database to complete the reading of the fixed value of any area.

[0028] The control flow for modifying the set value in the non-operating set value area is as follows: B21, the master station security module generates a fixed value modification message according to the detailed information of the relay protection device to be modified, the target non-operational fixed value zone number and the specific new fixed value content, and then sends the fixed value modification message to the substation security substation module through the security channel; B22. After receiving the fixed value modification message from the main station security module, the substation security module verifies the fixed value modification message. The verification content includes whether the fixed value modification message is compliant and whether the data verification code is correct. If the verification passes, the fixed value modification message is forwarded to the relay protection device. If the verification fails, the fixed value modification message with the specific error reason is returned to the main station security module, and the module is informed that the request cannot be executed. B23. After receiving the setting value modification request message, the relay protection device also verifies the legitimacy of the message. After confirming that it is correct, it extracts the new setting value data in the message and writes it into the corresponding non-operation setting value area. During the writing process, a series of internal operations such as data integrity verification and storage location confirmation are performed to ensure that the new setting value can be accurately updated to the specified non-operation setting value area; B24. After the setting value is updated, the relay protection device will generate a setting value modification result feedback message, which will indicate whether the setting value modification is successful. If successful, the corresponding success flag will be set, and some simple operation record information will be attached; if failed, the cause of the failure will be explained in detail in the setting value modification result feedback message, such as the new setting value exceeds the allowable range, storage writing errors, etc., and then the relay protection device will send the setting value modification result feedback message to the substation security substation module through the station link; B25. After receiving the feedback message of the fixed value modification result of the relay protection device, the substation security module verifies the feedback message of the fixed value modification result and forwards it back to the main station security module. After receiving the feedback message of the fixed value modification result, the main station security module determines whether the fixed value modification operation is successful according to the content in the feedback message of the fixed value modification result. If successful, the operator is prompted that the modification is completed and the relevant fixed value record information is updated; if failed, the specific reason for the failure is displayed to the operator so that further processing measures can be taken later; The control flow of modifying the set value in the running set value area is as follows: B31. After the operator initiates the operation instruction to modify the set value of the operation setting area in the master station security module, the master station security module first evaluates the current operation status of the entire power system to determine whether the conditions for switching the operation setting area are met (for example, whether the relevant protection function is in a switchable state, whether there are important protection actions currently being executed, etc.), and at the same time determines the information of the target setting area number to be switched to. After confirmation, the master station security module constructs a pre-request message for switching the operation setting area according to the communication protocol. The pre-request message contains key contents such as the relevant information of the relay protection device, the current operation setting area number, and the target setting area number, and sends the message to the substation security substation module through the security channel; B32. After receiving the pre-request message, the substation security substation module verifies the pre-request message and forwards it to the relay protection device after passing the verification. After receiving the pre-request message, the relay protection device conducts a comprehensive check on its current operating status to determine whether it really has the conditions for switching the operating setting zone, such as whether there is any ongoing fault processing and whether the corresponding locking logic is satisfied; if the conditions are met, the relay protection device performs the corresponding locking operation (such as temporarily locking some protection exits that may be affected by the setting switching, etc.), and then returns a confirmation message allowing the switching to the substation security substation module; if the conditions are not met, a message not allowing the switching is returned with detailed reasons; B33. After receiving the confirmation message of switching permission returned by the relay protection device, the substation security module forwards it back to the main station security module. After receiving the confirmation message of switching permission, the main station security module organizes the new set value data that has been strictly verified and formatted into a set value modification message, and sends it to the substation security module through the security channel. The substation security module then forwards it to the relay protection device. After receiving the new set value data, the relay protection device starts to write it into the original operation set value area. During this process, strict data comparison, verification and update operations will be performed to ensure that the new set value can accurately replace the old set value and complete the switching operation of the operation set value area. B34. After the switching of the operating setting zone is completed, the relay protection device performs the unlocking operation, restores the relevant protection function export settings that were locked before switching the setting zone, and generates a feedback message containing the setting value modification success and unlocking completion information, which is sent to the substation security substation module through the intra-station link. The substation security substation module forwards it to the main station security module after verification; B35. After receiving the feedback message, the main station security module confirms that the operating setting area has been successfully modified and the relevant protection functions have been restored to normal, updates the operating setting information and device status information of the relay protection device recorded in itself, and prompts the operator on the operation interface that the operation is successful. At the same time, the data involved in the entire operation process is stored and archived for subsequent query, statistics and analysis.

[0029] The substation telecontrol module is used to correctly and completely forward the relevant remote operation instructions issued by the master station EMS module to the controlled relay protection device; like Figure 4 As shown, the substation telecontrol module forwards the remote operation instruction issued by the master station EMS module as follows: C1. Receive the remote operation command issued by the master station EMS module through the remote control channel, and use the verification formula to verify the remote operation command. The verification formula is as follows: ,in, is the generating polynomial, M(x) is the information polynomial, and n is the generating polynomial The number of times, k is the number of times M(x), is the remainder polynomial; C2: If the verification fails, an error message is sent to the master station EMS module, requesting to resend the instruction; if the verification passes, enter C3; C3. Parse the passed instructions and extract key information, including operation object, operation type and related parameters, and pre-process the instructions according to the key information; C4. According to the operation object information obtained by parsing, the pre-processed instructions are accurately forwarded to the corresponding controlled relay protection device; C5. After the relay protection device completes the operation, it will feed back the operation results to the substation telecontrol module. After receiving the feedback information, the telecontrol module will analyze and verify it to ensure the accuracy and completeness of the results; C6. Record the operation results and related process information in a local log file or database for subsequent query and analysis; at the same time, generate a corresponding report based on the operation results and feed it back to the master station EMS module through the telecontrol channel to inform it whether the operation is successful and related detailed information; The substation protection module is used to correctly and completely forward the relevant remote operation instructions issued by the main station protection module to the controlled relay protection device; The substation security substation module forwards the remote operation command issued by the master station EMS module as follows: D1. The substation security substation module receives remote operation instructions from the main station EMS module; the remote operation instructions include remote operations of soft pressure plate input and output, setting zone switching and signal reset; D2. After receiving the command, the substation security substation module parses the command to ensure that its format and content conform to the predefined protocols and standards; D3. After parsing the command, the substation security substation module will verify the command, including checking the integrity, correctness and legality of the command; D31. If the command verification passes, the substation security substation module will forward the command to the controlled relay protection device. After the command is forwarded, the substation security substation module needs to wait for confirmation information from the relay protection device to confirm that the command has been successfully received and executed; D32. If the command verification fails, the substation security module sends an error message to the main station security module, requesting to resend the command. D4. The substation security substation module records the process of receiving, parsing, checking, forwarding and confirming the instructions, and generates corresponding log information for subsequent auditing and troubleshooting.

[0030] The relay protection device is used to protect the stable operation of the power system.

[0031] The working process of the relay protection device to protect the stable operation of the power system is as follows: E1. Collect the electrical quantities of current and voltage of the power system through current transformers and voltage transformers, and measure and calculate the collected electrical quantities to obtain real-time status information of the power system; E2: Perform fault detection based on the collected electrical quantities and the preset protection logic. If no fault is detected, enter E1; if a fault is detected (such as short circuit, overload, etc.), enter E3; E3. The relay protection device immediately executes the preset protection action, which includes tripping, cutting off the faulty equipment, etc., to isolate the fault and prevent the fault from spreading; E4. After the fault is handled, the relay protection device will record the time, location, and type of the fault and generate a corresponding fault report. The fault report is used for subsequent accident analysis and troubleshooting.

[0032] E5. After the fault is isolated and handled, the relay protection device will enter the recovery state, waiting for confirmation information from the operator or automatically performing a reset operation to restore normal protection functions.

[0033] Through the coordination of the master station EMS module, the master station security module, the substation telecontrol module, the substation security substation module and the relay protection device, the accuracy and reliability of the remote operation of the relay protection can be ensured, thereby effectively ensuring the safe and stable operation of the power grid. At the same time, since remote operation is realized, the workload of the operation and maintenance personnel can be greatly reduced and the work efficiency can be improved. In addition, through the method of double verification of messages and files, the accuracy and safety of the operation can be further improved, and the operation and maintenance costs can be reduced.

[0034] Based on the above-described relay protection remote control system based on message combined with file double check, the present invention also provides a relay protection remote control method based on message combined with file double check, such as Figure 5 As shown, the following steps are included: S1. The master station EMS module or the master station security module generates a remote operation command and sends it to the substation through the telecontrol channel or the security channel; S2, the substation telecontrol module or substation security substation module receives the command and performs preliminary message analysis and verification; after the verification is passed, the command is forwarded to the controlled relay protection device; S3. The relay protection device receives the command and performs a secondary check at the message level to ensure the correctness of the command; S4. For remote operation of setting value modification, the master station security module generates a file containing detailed setting value information and sends it to the substation security module through the security channel; S5. The substation security substation module receives the file and performs integrity check and format check on the file. After the check passes, the file is forwarded to the controlled relay protection device; S6. The relay protection device receives the file and performs a secondary check at the file level. The secondary check at the file level includes the correctness and completeness of the file content and whether it is consistent with the current system status; S7. After the message and the file are verified, the relay protection device executes the remote operation command, which includes soft pressure plate input and output, setting zone switching, signal reset or setting value modification; S8. During the execution process, the relay protection device needs to perform real-time status monitoring and fault detection to ensure the safety and effectiveness of the operation; S9. After the relay protection device completes the operation, it sends the operation result feedback to the substation protection substation module or the substation telecontrol module; S10, the substation security substation module or the substation telecontrol module receives the feedback and performs corresponding processing or recording; S11. The master station EMS module or the master station security module confirms whether the remote operation is successfully completed based on the feedback result.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A relay protection remote control system based on message combined with file double verification, characterized in that: include: The master station EMS module remotely operates the soft pressure plate of the relay protection device, the setting zone switching and the signal reset through the telecontrol channel; A master station security module, which realizes remote operation of setting value modification of relay protection device through a security channel, and the master station EMS module is electrically connected to the master station security module; The substation telecontrol module is used to correctly and completely forward the relevant remote operation instructions issued by the master station EMS module to the controlled relay protection device; Substation security substation module, which is used to correctly and completely forward the relevant remote operation instructions issued by the main station security module to the controlled relay protection device; A relay protection device, wherein the relay protection device is used to protect the stable operation of the power system; The master station EMS module is electrically connected to the substation telecontrol module, the master station security module is electrically connected to the substation security substation module, and both the substation telecontrol module and the substation security substation module are electrically connected to the relay protection device.

2. According to claim 1, a relay protection remote control system based on message and file double verification is characterized in that: The process of the master station EMS module performing the soft pressure plate operation on the relay protection device through the telecontrol channel includes a selection process, an execution process and a cancellation process, wherein the selection process is: the master station EMS module sends a remote control selection command to the substation telecontrol module, the object is the soft pressure plate entry to be remotely controlled, and the target value is the soft pressure plate target value. After receiving the remote control selection command, the substation telecontrol module returns a remote control selection return message to the master station EMS module: The execution process is as follows: the master station EMS module sends a remote control execution command to the substation telecontrol module. After receiving the remote control execution command, the substation telecontrol module returns a remote control execution result response to the master station EMS module. The cancellation process is as follows: the master station EMS module sends a remote control cancellation command to the substation telecontrol module, and the substation telecontrol module returns a remote control cancellation result response to the master station EMS module after receiving the remote control cancellation command.

3. A relay protection remote control system based on message and file double verification according to claim 2, characterized in that: The master station EMS module switches the relay protection device setting area through the telecontrol channel as follows: A1. The master station EMS module constructs the remote adjustment setting point command message according to the DL / T634.5104 protocol; A2. The master station EMS module sends the constructed remote adjustment setting point command message to the corresponding relay protection device through the telecontrol channel; A3. After receiving the message, the relay protection device parses and verifies the message; A4. If the verification is passed, the relay protection device performs the setting zone switching operation, and the relay protection device switches its own operating setting zone to the setting zone number specified in the message; During the switching process, the relevant parameters will be updated and reconfigured to adapt to the new setting area; A5. After the relay protection device completes the switching of the set value zone, it returns the remote adjustment set point command execution result message to the master station EMS module; the execution result message contains information on whether the switching is successful. If successful, the master station EMS module confirms that the set value zone switching operation is completed; if failed, the master station EMS module performs further analysis and processing based on the returned error information.

4. A relay protection remote control system based on message and file double verification according to claim 3, characterized in that: When the master station EMS module performs remote operation on the signal reset of the relay protection device through the telecontrol channel, the reset operation includes a reset selection process and a reset execution process, wherein the reset selection process is that the master station EMS module sends a remote control command with selection to the substation telecontrol module, and the substation telecontrol module returns a remote control selection result response to the master station EMS module after receiving the selected remote control command; The reset execution process is that the master station EMS module sends a remote control command with execution to the substation telecontrol module. After receiving the remote control command to be executed, the substation telecontrol module returns the remote control execution result response to the master station EMS module.

5. A relay protection remote control system based on message and file double verification according to claim 4, characterized in that: The remote operation of modifying the set value of the relay protection device by the master station security module includes the control process of reading the set value of any area, the control process of modifying the set value of the non-operating set value area, and the control process of modifying the set value of the operating set value area.

6. A relay protection remote control system based on message and file double verification according to claim 5, characterized in that: The control flow of reading the set value of any area is as follows: B11. The operator sends a command to read the set value to the master station security module according to the relevant identification information of the relay protection device whose set value is to be read and the designated set value zone number. The master station security module constructs a request message for reading the set value of any zone according to the command information and the established communication protocol format, and then sends the request message to the substation security substation module through the security channel; B12. After receiving the set value read request message from the master station security module, the substation security module verifies the message to check whether there is any problem with the message format, such as whether it is correct or whether there is any transmission error. If the verification is correct, the set value read request message is forwarded intact to the corresponding relay protection device; If a problem is found in the message, an error message will be returned to the main station security module to inform it that the forwarding is abnormal; B13. After receiving the request message for reading the set value, the relay protection device first verifies the legitimacy of the request message to confirm that it comes from the authorized master station and meets its own communication requirements. After the verification is passed, the relay protection device extracts the corresponding set value data from its own corresponding storage area according to the set value area number specified in the request message, organizes and encapsulates the set value data in accordance with the communication protocol requirements, forms a set value response message that can be returned, and then sends the set value response message back to the substation security substation module through the intra-station link; B14. After receiving the fixed value response message sent back by the relay protection device, the substation security substation module will perform integrity and accuracy verification of the fixed value response message again to ensure that there is no error in the data during the transmission process within the station. After passing the verification, the fixed value response message will be forwarded back to the main station security module through the security channel; B15. After the main station security module receives the fixed value response message forwarded back by the substation security module, it parses the fixed value response message according to the communication protocol, extracts the fixed value data contained therein, and displays the fixed value data on the operation interface.

7. A relay protection remote control system based on message and file double verification according to claim 6, characterized in that: The control flow for modifying the set value in the non-operating set value area is as follows: B21, the master station security module generates a fixed value modification message according to the detailed information of the relay protection device to be modified, the target non-operational fixed value zone number and the specific new fixed value content, and then sends the fixed value modification message to the substation security substation module through the security channel; B22. After receiving the fixed value modification message from the main station security module, the substation security module verifies the fixed value modification message. The verification content includes whether the fixed value modification message is compliant and whether the data verification code is correct. If the verification passes, the fixed value modification message is forwarded to the relay protection device. If the verification fails, the fixed value modification message with the specific error reason is returned to the main station security module, and the module is informed that the request cannot be executed. B23. After receiving the setting value modification request message, the relay protection device also verifies the legitimacy of the message. After confirming that it is correct, it extracts the new setting value data in the message and writes it into the corresponding non-operation setting value area; B24. After the setting value is updated, the relay protection device will generate a setting value modification result feedback message, which will indicate whether the setting value modification is successful. If successful, the corresponding success flag will be set, and some simple operation record information will be attached; If it fails, the reason for the failure is described in detail in the fixed value modification result feedback message. Subsequently, the relay protection device sends the fixed value modification result feedback message to the substation security substation module through the intra-station link; B25. After the substation security substation module receives the fixed value modification result feedback message from the relay protection device, it verifies the fixed value modification result feedback message and forwards it back to the main station security module. After the main station security module receives the fixed value modification result feedback message, it determines whether the fixed value modification operation is successful based on the content in the fixed value modification result feedback message. If successful, the operator is prompted that the modification is completed and the relevant fixed value record information is updated; if failed, the specific reason for failure is displayed to the operator.

8. A relay protection remote control system based on message and file double verification according to claim 7, characterized in that: The control flow of modifying the set value in the running set value area is as follows: B31. After the operator initiates the operation instruction to modify the set value of the operation set value area in the master station security module, the master station security module first evaluates the current operation status of the entire power system to determine whether the conditions for switching the operation set value area are met, and at the same time determines the information of the target set value area number to be switched to. After confirmation, the master station security module constructs the pre-request message for switching the operation set value area according to the communication protocol, and sends the message to the substation security substation module through the security channel; B32. After receiving the pre-request message, the substation security substation module verifies the pre-request message and forwards it to the relay protection device after passing the verification. After receiving the pre-request message, the relay protection device conducts a comprehensive check on its current operating status to determine whether it really meets the conditions for switching the operating setting zone. If the conditions are met, the relay protection device performs the corresponding locking operation and then returns a confirmation message allowing the switching to the substation security substation module; If the conditions are not met, a switching-not-allowed message with detailed reasons is returned; B33. After receiving the confirmation message of switching permission returned by the relay protection device, the substation security module forwards it back to the main station security module. After receiving the confirmation message of switching permission, the main station security module organizes the new set value data that has been strictly verified and formatted into a set value modification message, and sends it to the substation security module through the security channel. The substation security module then forwards it to the relay protection device. After receiving the new set value data, the relay protection device starts to write it into the original operation set value area; B34. After the switching of the operating setting zone is completed, the relay protection device performs the unlocking operation, restores the relevant protection function export settings that were locked before switching the setting zone, and generates a feedback message containing the setting value modification success and unlocking completion information, which is sent to the substation security substation module through the intra-station link. The substation security substation module forwards it to the main station security module after verification; B35. After receiving the feedback message, the main station security module confirms that the operating setting area has been successfully modified and the relevant protection functions have been restored to normal, updates the operating setting information and device status information of the relay protection device recorded in itself, and prompts the operator on the operation interface that the operation is successful. At the same time, the data involved in the entire operation process is stored and archived.

9. A relay protection remote control system based on message and file double verification according to claim 8, characterized in that: The process of the substation telecontrol module forwarding the remote operation command issued by the master station EMS module is as follows: C1. Receive the remote operation command issued by the master station EMS module through the remote control channel, and use the verification formula to verify the remote operation command. The verification formula is as follows: ,in, is the generating polynomial, M(x) is the information polynomial, and n is the generating polynomial The number of times, k is the number of times M(x), is the remainder polynomial; C2: If the verification fails, an error message is sent to the master station EMS module, requesting to resend the instruction; if the verification passes, enter C3; C3. Parse the passed instructions and extract key information, including operation object, operation type and related parameters, and pre-process the instructions according to the key information; C4. According to the operation object information obtained by parsing, the pre-processed instructions are accurately forwarded to the corresponding controlled relay protection device; C5. After the relay protection device completes the operation, it will feed back the operation result to the substation telecontrol module; C6. Record the operation results and related process information in a local log file or database; at the same time, generate a corresponding report based on the operation results and feed it back to the master station EMS module through the remote control channel to inform it whether the operation is successful and related detailed information.

10. A relay protection remote control method based on message combined with file double check, based on a relay protection remote control system based on message combined with file double check according to any one of claims 1 to 9, characterized in that: The steps include: S1. The master station EMS module or the master station security module generates a remote operation command and sends it to the substation through the telecontrol channel or the security channel; S2, the substation telecontrol module or substation security substation module receives the command and performs preliminary message analysis and verification; after the verification is passed, the command is forwarded to the controlled relay protection device; S3. The relay protection device receives the command and performs a secondary check at the message level to ensure the correctness of the command; S4. For remote operation of setting value modification, the master station security module generates a file containing detailed setting value information and sends it to the substation security module through the security channel; S5. The substation security substation module receives the file and performs integrity check and format check on the file. After the check passes, the file is forwarded to the controlled relay protection device; S6. The relay protection device receives the file and performs a secondary check at the file level. The secondary check at the file level includes the correctness and completeness of the file content and whether it is consistent with the current system status; S7. After the message and the file are verified, the relay protection device executes the remote operation command, which includes soft pressure plate input and output, setting zone switching, signal reset or setting value modification; S8. During the execution process, the relay protection device needs to perform real-time status monitoring and fault detection to ensure the safety and effectiveness of the operation; S9. After the relay protection device completes the operation, it sends the operation result feedback to the substation protection substation module or the substation telecontrol module; S10, the substation security substation module or the substation telecontrol module receives the feedback and performs corresponding processing or recording; S11. The master station EMS module or the master station security module confirms whether the remote operation is successfully completed based on the feedback result.

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