A method and device for troubleshooting dual-network signals at the process layer of an intelligent substation

Abstract

The present invention provides a method and device for checking dual-network signals at the process layer of a smart substation, the method comprising receiving a signal sent by each interface at the process layer of the smart substation; reading a signal sent by each interface that meets a preset filtering condition at a preset time interval; if the signal sent by each interface is two frames of data, then judging whether the signal data are the same, if so, then judging that the dual-network states of the process layer of the smart substation are consistent, otherwise, obtaining the application number corresponding to the signal data; checking and locating the dual-network signals at the process layer of the smart substation based on the application number corresponding to the signal data. The method for checking dual-network signals at the process layer of a smart substation proposed by the present invention can effectively improve the efficiency of signal checking and facilitate rapid location of the cause of dual-network anomalies on site.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection of power systems, and in particular to a method and device for troubleshooting dual-network signals at a process layer of an intelligent substation. Background Art

[0002] The process layer of the smart substation adopts a dual network (A network, B network) mechanism to transmit GOOSE signals, where A network is further divided into A1 and A2 networks, and B network is further divided into B1 and B2 networks. A1 network, A2 network, B1 network and B2 network are independent of each other and redundant, which can ensure the reliability of network communication at the process layer of the smart substation. However, in actual application, since the process layer networks of the smart substation are independent of each other, there may be alarms such as inconsistent dual network signals or dual network abnormalities due to many reasons such as device abnormalities or network connections. GOOSE signals involve important control signals such as tripping, position signals, and interlocking, so it is necessary to promptly investigate the specific causes of the alarms.

[0003] However, in the process of signal troubleshooting at the process layer of the smart substation, the existing technology can only compare and analyze abnormal messages through network analysis equipment. It lacks effective and convenient operation and maintenance tools, has low troubleshooting efficiency, and is not conducive to rapid on-site troubleshooting and locating the causes of dual-network anomalies. Summary of the invention

[0004] The present invention aims to provide a method and device for troubleshooting dual-network signals at the process layer of an intelligent substation to solve the above-mentioned technical problems, which can effectively improve the efficiency of signal troubleshooting and facilitate rapid location of the cause of dual-network abnormalities on site.

[0005] In order to solve the above technical problems, the present invention provides a method for troubleshooting dual-network signals at the process layer of a smart substation, comprising the following steps:

[0006] Receive signals from each interface of the smart substation process layer;

[0007] Read the signals sent by each interface that meet the preset filtering conditions at the preset time interval;

[0008] If the signal sent by each interface is two frames of data, determine whether the signal data are the same. If so, determine that the dual network states of the process layer of the smart substation are consistent. Otherwise, obtain the application number corresponding to the signal data.

[0009] Based on the application number corresponding to the signal data, the dual-network signals of the process layer of the smart substation are checked and located.

[0010] The above scheme reads the signals sent by each interface of the process layer of the smart substation that meet the preset filtering conditions at the preset time interval, and compares and judges the read signal data, so as to directly and quickly filter out the process layer of the smart substation with inconsistent dual network status, and then completes the investigation and positioning of the dual network signals of the process layer of the smart substation by obtaining the application number corresponding to the signal data. This method can effectively improve the efficiency of signal investigation and facilitate the rapid positioning of the abnormal causes of the dual networks on site.

[0011] Furthermore, the dual-network signal of the process layer of the smart substation is checked and located based on the application number corresponding to the signal data, specifically:

[0012] Based on the application number corresponding to the signal data, the SCD file and CSD file of the smart substation are searched to complete the investigation and positioning of the dual-network signals at the process layer of the smart substation.

[0013] The above solution organically combines the SCD file and CSD file of the smart substation, and can quickly check the fault location according to the dual-network signals of the process layer of the smart substation, which greatly facilitates the rapid location of the cause of the dual-network abnormality on site.

[0014] Furthermore, the SCD file and CSD file of the smart substation are searched based on the application number corresponding to the signal data to complete the investigation and positioning of the dual-network signal of the process layer of the smart substation, specifically:

[0015] Find the MAC address of the application number corresponding to the signal data in the SCD file of the smart substation;

[0016] Find the swConfig part of the CSD file through the MAC address, find the switch that configures the MAC address, and obtain the location of the switch through the Topology part to complete the investigation and positioning of the dual-network signals at the process layer of the smart substation;

[0017] The swConfig part is used to describe the MAC addresses configured for different interfaces of the switch; and the Topology part is used to describe the location of the switch in the smart substation.

[0018] Further, the reading of the signal satisfying the preset filtering condition sent by each interface at the preset time interval is specifically:

[0019] The preset filtering condition is an application number defined in the SCD file of the smart substation;

[0020] At preset time intervals, read the signal sent by each interface that meets the application number.

[0021] In the above scheme, by filtering the signal sent by each interface according to a certain application number, the signal sent by the IED device corresponding to the application number can be screened out, which can improve the pertinence of troubleshooting and positioning.

[0022] Furthermore, a method for troubleshooting dual-network signals at the process layer of a smart substation also includes updating preset filtering conditions based on the SCD file of the smart substation, and reading signals emitted by each interface that meet the updated preset filtering conditions at preset time intervals until all application numbers defined in the SCD file of the smart substation are traversed.

[0023] In the above scheme, the preset filtering conditions are updated based on the SCD file of the smart substation, so that the signals emitted by all IED devices in the smart substation can be checked, thereby improving the comprehensiveness of the troubleshooting and positioning.

[0024] The present invention also proposes a smart substation process layer dual-network signal troubleshooting device, comprising a signal receiving module, a signal reading module, a signal judgment module and a signal troubleshooting module; wherein:

[0025] The signal receiving module is used to receive the signal sent by each interface of the process layer of the smart substation;

[0026] The signal reading module is used to read the signal that meets the preset filtering condition sent by each interface at a preset time interval;

[0027] The signal judgment module is used to judge whether the signal data are the same when the signals sent by each interface are two frames of data. If so, it is judged that the dual network states of the process layer of the smart substation are consistent. Otherwise, the application number corresponding to the signal data is obtained;

[0028] The signal troubleshooting module is used to troubleshoot and locate the dual-network signals of the process layer of the smart substation based on the application number corresponding to the signal data.

[0029] Furthermore, the signal troubleshooting module is used to troubleshoot and locate the dual-network signals of the process layer of the smart substation based on the application number corresponding to the signal data, specifically:

[0030] Based on the application number corresponding to the signal data, the SCD file and CSD file of the smart substation are searched to complete the investigation and positioning of the dual-network signals at the process layer of the smart substation.

[0031] Further, in the signal troubleshooting module, the SCD file and CSD file of the smart substation are searched based on the application number corresponding to the signal data to complete the troubleshooting and positioning of the dual-network signal of the process layer of the smart substation, specifically:

[0032] Find the MAC address of the application number corresponding to the signal data in the SCD file of the smart substation;

[0033] Find the swConfig part of the CSD file through the MAC address, find the switch that configures the MAC address, and obtain the location of the switch through the Topology part to complete the investigation and positioning of the dual-network signals at the process layer of the smart substation;

[0034] The swConfig part is used to describe the MAC addresses configured for different interfaces of the switch; and the Topology part is used to describe the location of the switch in the smart substation.

[0035] Furthermore, the signal reading module is used to read the signal that meets the preset filtering condition sent by each interface at a preset time interval, specifically:

[0036] The preset filtering condition is an application number defined in the SCD file of the smart substation;

[0037] At preset time intervals, read the signal sent by each interface that meets the application number.

[0038] Furthermore, a smart substation process layer dual-network signal troubleshooting device also includes a filtering condition update module, which is used to update the preset filtering conditions based on the SCD file of the smart substation, and read the signal sent by each interface that meets the updated preset filtering conditions at a preset time interval until all application numbers defined in the SCD file of the smart substation are traversed. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of a process flow of a dual-network signal troubleshooting method for a smart substation process layer provided by an embodiment of the present invention;

[0040] Figure 2 A schematic diagram of the module connection of a dual-network signal troubleshooting device for a process layer of an intelligent substation provided by an embodiment of the present invention;

[0041] Figure 3 A schematic diagram of a specific implementation of a device for troubleshooting dual-network signals at a process layer of a smart substation provided by an embodiment of the present invention;

[0042] Figure 4 A flowchart of a specific implementation method of a dual-network signal troubleshooting method at the process layer of a smart substation provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0044] See also Figure 1 , a method for troubleshooting dual-network signals at the process layer of a smart substation, comprising the following steps:

[0045] S1: Receive a signal sent by each interface of the smart substation process layer; the signal may be a GOOSE message signal;

[0046] S2: Read the signal sent by each interface that meets the preset filtering condition at a preset time interval;

[0047] S3: If the signals sent by each interface are two frames of data, determine whether the signal data are the same. If so, determine that the dual network states of the process layer of the smart substation are consistent. Otherwise, obtain the application number APPID corresponding to the signal data.

[0048] S4: Based on the application number APPID corresponding to the signal data, the dual-network signals of the process layer of the smart substation are checked and located.

[0049] This embodiment reads the signals sent by each interface of the smart substation process layer that meet the preset filtering conditions at a preset time interval, and compares and judges the read signal data, so that the smart substation process layer with inconsistent dual network status can be directly and quickly screened out, and then the dual network signals of the smart substation process layer are checked and located by obtaining the application number corresponding to the signal data. This method can effectively improve the efficiency of signal troubleshooting and facilitate the rapid location of the abnormal causes of the dual networks on site.

[0050] Furthermore, the dual-network signal of the process layer of the smart substation is checked and located based on the application number corresponding to the signal data, specifically:

[0051] Based on the application number corresponding to the signal data, the SCD file and CSD file of the smart substation are searched to complete the investigation and positioning of the dual-network signals at the process layer of the smart substation.

[0052] This embodiment organically combines the SCD file and CSD file of the smart substation, and can quickly check the fault location according to the dual-network signals of the process layer of the smart substation, which greatly facilitates the rapid location of the cause of the dual-network abnormality on site.

[0053] Furthermore, the SCD file and CSD file of the smart substation are searched based on the application number corresponding to the signal data to complete the investigation and positioning of the dual-network signal of the process layer of the smart substation, specifically:

[0054] Find the MAC address of the application number corresponding to the signal data in the SCD file of the smart substation;

[0055] Find the swConfig part of the CSD file through the MAC address, find the switch that configures the MAC address, and obtain the location of the switch through the Topology part to complete the investigation and positioning of the dual-network signals at the process layer of the smart substation;

[0056] The swConfig part is used to describe the MAC addresses configured for different interfaces of the switch; and the Topology part is used to describe the location of the switch in the smart substation.

[0057] Further, the reading of the signal satisfying the preset filtering condition sent by each interface at the preset time interval is specifically:

[0058] The preset filtering condition is an application number defined in the SCD file of the smart substation;

[0059] At preset time intervals, read the signal sent by each interface that meets the application number.

[0060] In this embodiment, by filtering the signal sent by each interface according to a certain application number, the signal sent by the IED device corresponding to the application number can be screened out, which can improve the pertinence of the investigation and positioning.

[0061] Furthermore, a method for troubleshooting dual-network signals at the process layer of a smart substation also includes: S5: updating the preset filtering conditions based on the SCD file of the smart substation, and reading the signals emitted by each interface that meet the updated preset filtering conditions at preset time intervals until all application numbers defined in the SCD file of the smart substation are traversed.

[0062] In this embodiment, the preset filtering condition is updated based on the SCD file of the smart substation, so that the signals emitted by all IED devices in the smart substation can be checked, thereby improving the comprehensiveness of the check and positioning.

[0063] See also Figure 2 This embodiment proposes a smart substation process layer dual-network signal troubleshooting device, which is used to implement a smart substation process layer dual-network signal troubleshooting method, which includes a signal receiving module, a signal reading module, a signal judgment module and a signal troubleshooting module; wherein:

[0064] The signal receiving module is used to receive the signal sent by each interface of the process layer of the smart substation;

[0065] The signal reading module is used to read the signal that meets the preset filtering condition sent by each interface at a preset time interval;

[0066] The signal judgment module is used to judge whether the signal data are the same when the signals sent by each interface are two frames of data. If so, it is judged that the dual network states of the process layer of the smart substation are consistent. Otherwise, the application number corresponding to the signal data is obtained;

[0067] The signal troubleshooting module is used to troubleshoot and locate the dual-network signals of the process layer of the smart substation based on the application number corresponding to the signal data.

[0068] Furthermore, the signal troubleshooting module is used to troubleshoot and locate the dual-network signals of the process layer of the smart substation based on the application number corresponding to the signal data, specifically:

[0069] Based on the application number corresponding to the signal data, the SCD file and CSD file of the smart substation are searched to complete the investigation and positioning of the dual-network signals at the process layer of the smart substation.

[0070] Further, in the signal troubleshooting module, the SCD file and CSD file of the smart substation are searched based on the application number corresponding to the signal data to complete the troubleshooting and positioning of the dual-network signal of the process layer of the smart substation, specifically:

[0071] Find the MAC address of the application number corresponding to the signal data in the SCD file of the smart substation;

[0072] Find the swConfig part of the CSD file through the MAC address, find the switch that configures the MAC address, and obtain the location of the switch through the Topology part to complete the investigation and positioning of the dual-network signals at the process layer of the smart substation;

[0073] The swConfig part is used to describe the MAC addresses configured for different interfaces of the switch; and the Topology part is used to describe the location of the switch in the smart substation.

[0074] Furthermore, the signal reading module is used to read the signal that meets the preset filtering condition sent by each interface at a preset time interval, specifically:

[0075] The preset filtering condition is an application number defined in the SCD file of the smart substation;

[0076] At preset time intervals, read the signal sent by each interface that meets the application number.

[0077] Furthermore, a smart substation process layer dual-network signal troubleshooting device also includes a filtering condition update module, which is used to update the preset filtering conditions based on the SCD file of the smart substation, and read the signal sent by each interface that meets the updated preset filtering conditions at a preset time interval until all application numbers defined in the SCD file of the smart substation are traversed.

[0078] This embodiment reads the signals sent by each interface of the process layer of the smart substation that meet the preset filtering conditions at a preset time interval, and compares and judges the read signal data, so that the process layer of the smart substation with inconsistent dual network status can be directly and quickly screened out, and then the dual network signals of the process layer of the smart substation are checked and located by obtaining the application number corresponding to the signal data. The device can effectively improve the efficiency of signal troubleshooting and facilitate the rapid location of the abnormal causes of the dual networks on site.

[0079] Furthermore, in order to further describe the technical implementation process of the present invention and highlight its technical advantages, this embodiment provides a specific implementation method of the smart substation process layer dual network signal troubleshooting device. For details, please refer to Figure 3 The device includes a first network port, a second network port, a third network port, a fourth network port, an APPID filter, a first memory, a second memory, a third memory, a fourth memory, a dual network matching module, and an abnormal alarm module; wherein:

[0080] The first network port, the second network port, the third network port, and the fourth network port are used to receive the message signal sent by each interface of the process layer of the smart substation and send it to the APPID filter. For the message signal data frame received by the first network port, it is sent to the first memory for storage after passing through the APPID filter; for the message signal data frame received by the second network port, it is sent to the second memory for storage after passing through the APPID filter; for the message signal data frame received by the third network port, it is sent to the third memory for storage after passing through the APPID filter; for the message signal data frame received by the fourth network port, it is sent to the fourth memory for storage after passing through the APPID filter. The dual-network matching module sequentially schedules the data frames stored in the first memory, the second memory, the third memory, and the fourth memory, reads the signal sent by each interface that meets the preset filtering conditions and performs logical judgment according to the preset time interval, and sends the final result to the abnormal alarm module.

[0081] It should be noted that an IED device in a smart substation will simultaneously inject the same message into the A1, B1, A2, and B2 networks, and these messages have the same APPID. Through the APPID filter, the messages sent by a certain IED device can be fixedly filtered.

[0082] For further information, see Figure 4 The specific implementation method of the above-mentioned smart substation process layer dual-network signal troubleshooting device includes:

[0083] Step 1: disconnect the network cable connection between the A1 network center switch of the process layer of the smart substation and the smart recorder, and establish a network cable connection between the A1 network center switch of the process layer of the smart substation and the first network port;

[0084] It should be noted that the intelligent recorder obtains the GOOSE messages sent by various protection and measurement and control devices in the intelligent substation process layer A1 network through the central switch of the intelligent substation process layer A1 network. Use the first network port to replace the intelligent recorder to access the central switch of the intelligent substation process layer A1 network, so that the first network port can receive the GOOSE messages sent by various protection and measurement and control devices in the intelligent substation process layer A1 network.

[0085] Step 2: disconnect the network cable connection between the A2 network center switch of the process layer of the smart substation and the smart recorder, and establish a network cable connection between the A2 network center switch of the process layer of the smart substation and the second network port.

[0086] It should be noted that the intelligent recorder obtains the GOOSE messages sent by various protection and measurement and control devices in the process layer A2 network of the intelligent substation through the central switch of the process layer A2 network of the intelligent substation. The second network port is used to replace the intelligent recorder to access the central switch of the process layer A2 network of the intelligent substation, so that the second network port can receive the GOOSE messages sent by various protection and measurement and control devices in the process layer A2 network of the intelligent substation.

[0087] Step 3: Disconnect the network cable connection between the B1 network center switch of the process layer of the smart substation and the smart recorder, and establish a network cable connection between the B1 network center switch of the process layer of the smart substation and the third network port.

[0088] It should be noted that the intelligent recorder obtains the GOOSE messages sent by various protection and measurement and control devices in the process layer B1 network of the intelligent substation through the central switch of the process layer B1 network of the intelligent substation. The third network port is used to replace the intelligent recorder to access the central switch of the process layer B1 network of the intelligent substation, so that the third network port can receive the GOOSE messages sent by various protection and measurement and control devices in the process layer B1 network of the intelligent substation.

[0089] Step 4: disconnect the network cable connection between the B2 network center switch of the process layer of the smart substation and the smart recorder, and establish a network cable connection between the B2 network center switch of the process layer of the smart substation and the fourth network port.

[0090] It should be noted that the intelligent recorder obtains the GOOSE messages sent by various protection and measurement and control devices in the process layer B2 network of the intelligent substation through the central switch of the process layer B2 network of the intelligent substation. The fourth network port is used to replace the intelligent recorder to access the central switch of the process layer B2 network of the intelligent substation, so that the fourth network port can receive the GOOSE messages sent by various protection and measurement and control devices in the process layer B2 network of the intelligent substation.

[0091] It should be noted that, in this embodiment, the network connection of the intelligent recorder is replaced by the first network port, the second network port, the third network port, and the fourth network port, thereby achieving full coverage monitoring of the process layer network data of the intelligent substation.

[0092] Step 5: Use the APPID filtering module to select an APPID defined in the smart substation, and filter the GOOSE messages from the first network port, the second network port, the third network port, and the fourth network port respectively. If all APPIDs defined in the SCD file of the smart substation have been traversed, proceed to step 12, otherwise proceed to step 6.

[0093] It should be noted that each smart substation has a corresponding SCD file. The SCD file defines the specific format of the GOOSE message sent by various protection and measurement and control devices in the process layer of the smart substation. The APPID field of the GOOSE message sent by each device is different.

[0094] Step 6. If the data frame received by the first network port meets the APPID filtering condition in step 5, the message is stored in the first memory, otherwise it is not processed; if the data frame received by the second network port meets the APPID filtering condition in step 5, the message is stored in the second memory, otherwise it is not processed; if the data frame received by the third network port meets the APPID filtering condition in step 5, the message is stored in the third memory, otherwise it is not processed; if the data frame received by the fourth network port meets the APPID filtering condition in step 5, the message is stored in the fourth memory, otherwise it is not processed.

[0095] Step 7: The dual network matching module reads out all the data frames stored in the first memory, the second memory, the third memory, and the fourth memory every 6 seconds.

[0096] Step 8: If the first memory, the second memory, the third memory, and the fourth memory all read out two frames of GOOSE messages, execute step 9; otherwise, execute step 7.

[0097] It should be noted that based on the GOOSE message transmission mechanism, when there is no position change information in the GOOSE message, the GOOSE message is transmitted in the substation process layer network at a frequency of once every 5 seconds. Therefore, only 2 frames of GOOSE messages are received within 6 seconds, indicating that the switch position corresponding to the GOOSE message is in a stable state and has not changed, which is convenient for subsequent steps to process the message and check the consistency of the signal.

[0098] Step 9. If the two GOOSE message frames read out of the first memory are consistent with the two GOOSE message frames read out of the second memory, the two GOOSE message frames read out of the third memory, and the two GOOSE message frames read out of the fourth memory, it indicates that the signals transmitted by the current GOOSE message in the smart substation process layer A1 network, B1 network, A2 network, and B2 network are consistent, return to step 5; otherwise, continue to execute step 10.

[0099] It should be noted that this embodiment first parses the STNUM and SQNUM fields of the GOOSE message, and then parses the status information carried by the GOOSE message. When a frame message exists in the first memory, the second memory, the third memory, and the fourth memory at the same time, the STNUM and SQNUM fields are consistent and the status information is consistent, indicating that the GOOSE message corresponding to the APPID is normally transmitted in the smart substation process layer A1 network, B1 network, A2 network, and B2 network, and the dual network status is consistent. Otherwise, it indicates that there is a dual network inconsistency in the smart substation process layer network.

[0100] Step 10: The abnormal alarm module searches for the corresponding association description in the SCD file based on the APPID of the currently tested GOSOE message, including which device in the smart substation process layer sent the GOOSE message and the location of the device in the smart substation.

[0101] It should be noted that the SCD file of the smart substation describes the configuration information of each IED device in the smart substation, including the MAC address of the device and the APPID for sending and receiving GOOSE messages; while the CSD file of the smart substation describes the position of the switch in the smart substation in the Topology part, and the SwConfig part describes the static multicast MAC configured for different ports of each switch.

[0102] Therefore, after obtaining the APPID of the message, this embodiment finds the MAC address corresponding to the APPID through the description of the device information in the SCD file; then matches the swConfig part of the CSD file through the MAC address to find the switch configured with the MAC address, and obtains the location of the switch through Topology.

[0103] Step 11: On-site relay maintenance personnel check the configuration information of the corresponding device and eliminate any abnormalities. Then proceed to step 5.

[0104] Step 12: Complete the dual network signal check of the process layer network of the smart substation.

[0105] This embodiment combines the whole station configuration file SCD of the smart substation, and monitors, identifies, analyzes and compares the GOOSE messages transmitted by the A1 network, A2 network, B1 network and B2 network of the process layer of the smart substation, and can automatically and sequentially complete the double-network consistency check of the whole station GOOSE messages, which accelerates the commissioning period of the substation and brings convenience to the on-site maintenance personnel of the substation. By judging whether the messages sent by each IED device at the process layer of the smart substation are normally transmitted in the process layer network, and whether the redundancy characteristics of the process layer network are effective, it provides convenience for the on-site operation and maintenance of the smart substation.

[0106] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for troubleshooting dual-network signals at the process layer of a smart substation, characterized in that: The following steps are involved: Receive signals from each interface of the smart substation process layer; Reading, at a preset time interval, a signal sent by each interface that meets a preset filtering condition; the preset filtering condition is set according to the application number; and the signal sent by each interface is filtered using an application number filter; If the signal sent by each interface is two frames of data, determine whether the signal data are the same. If so, determine that the dual network states of the process layer of the smart substation are consistent. Otherwise, obtain the application number corresponding to the signal data. Based on the application number corresponding to the signal data, the dual-network signals of the process layer of the smart substation are checked and located; The process layer dual network signals of the smart substation are checked and located based on the application number corresponding to the signal data, specifically: Find the MAC address of the application number corresponding to the signal data in the SCD file of the smart substation; Find the swConfig part of the CSD file through the MAC address, find the switch that configures the MAC address, and obtain the location of the switch through the Topology part to complete the investigation and positioning of the dual-network signals at the process layer of the smart substation; The swConfig part is used to describe the MAC addresses configured for different interfaces of the switch; and the Topology part is used to describe the location of the switch in the smart substation.

2. According to claim 1, a method for troubleshooting dual-network signals at the process layer of a smart substation is characterized in that: The step of reading the signal sent by each interface and meeting the preset filtering condition at the preset time interval is specifically as follows: The preset filtering condition is an application number defined in the SCD file of the smart substation; At preset time intervals, read the signal sent by each interface that meets the application number.

3. A method for troubleshooting dual-network signals at the process layer of a smart substation according to claim 2, characterized in that: It also includes updating the preset filtering conditions based on the SCD file of the smart substation, and reading the signal that meets the updated preset filtering conditions sent by each interface at a preset time interval until all application numbers defined in the SCD file of the smart substation are traversed.

4. A smart substation process layer dual network signal troubleshooting device, characterized in that: It includes a signal receiving module, a signal reading module, a signal judging module and a signal troubleshooting module; wherein: The signal receiving module is used to receive the signal sent by each interface of the process layer of the smart substation; The signal reading module is used to read the signal sent by each interface that meets the preset filtering condition at a preset time interval; the preset filtering condition is set according to the application number; the signal sent by each interface is filtered using the application number filter; The signal judgment module is used to judge whether the signal data are the same when the signals sent by each interface are two frames of data. If so, it is judged that the dual network states of the process layer of the smart substation are consistent. Otherwise, the application number corresponding to the signal data is obtained; The signal troubleshooting module is used to troubleshoot and locate the dual-network signals of the process layer of the smart substation based on the application number corresponding to the signal data; The signal troubleshooting module is used to troubleshoot and locate the dual-network signals of the process layer of the smart substation based on the application number corresponding to the signal data, specifically: Find the MAC address of the application number corresponding to the signal data in the SCD file of the smart substation; Find the swConfig part of the CSD file through the MAC address, find the switch that configures the MAC address, and obtain the location of the switch through the Topology part to complete the investigation and positioning of the dual-network signals at the process layer of the smart substation; The swConfig part is used to describe the MAC addresses configured for different interfaces of the switch; and the Topology part is used to describe the location of the switch in the smart substation.

5. The device for checking dual-network signals at the process layer of a smart substation according to claim 4 is characterized in that: The signal reading module is used to read the signal that meets the preset filtering conditions sent by each interface at a preset time interval, specifically: The preset filtering condition is an application number defined in the SCD file of the smart substation; At preset time intervals, read the signal sent by each interface that meets the application number.

6. The device for checking dual-network signals at the process layer of a smart substation according to claim 5 is characterized in that: It also includes a filtering condition update module, which is used to update the preset filtering conditions based on the SCD file of the smart substation, and read the signal sent by each interface that meets the updated preset filtering conditions at a preset time interval until all application numbers defined in the SCD file of the smart substation are traversed.

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