Secondary cable replacement device and method and computer readable storage medium

Abstract

The invention provides a secondary cable replacement device and method and a computer readable storage medium, and the device comprises a switching module which comprises a first switch; the original power supply connection module comprises a second switch; the bypass power supply connection module comprises a third switch; the secondary cable replacement controller is connected to the first switch, the second switch and the third switch, and is used for receiving a secondary cable replacement instruction and replacing the secondary cable on the basis of the secondary cable replacement instruction; and successively switching the line protection device from the initial original power supply state to a dual power supply state, a bypass power supply state, a dual power supply state and an original power supply state. According to the technical scheme, the line protection device is always in an effective working state in which power can be supplied, the cable searching difficulty and the searching error rate are reduced while the protection function of the line protection device on a power system is ensured to be continuous and uninterrupted, and effective support is provided for relay protection field work.

Description

[Technical field]

[0001] The present application relates to the field of circuit technology, and in particular to a secondary cable replacement device and method and a computer-readable storage medium. [Background technology]

[0002] The secondary cabinets in the substation are large equipment that need to be used for a long time. The secondary cables in the secondary cabinets will age over time, causing performance degradation and prone to failure. It is especially necessary to replace the secondary cables for safety devices such as DC system cabinets and protection and control cabinets that are used to monitor power system anomalies and failures and respond correctly in a timely manner.

[0003] In this regard, the relevant technology proposes that the secondary cables can be replaced after these safety devices are powered off. However, these safety devices are particularly important for the safe and stable operation of the power system. During the power outage, the power system is equivalent to losing protection. At the same time, this method of replacing secondary cables after power outage often requires manual operation. If the replacement is carried out without power outage, a large amount of secondary cable search and verification work is involved. In actual scenarios, there are often problems such as some cables without drawings, labels, or disordered labels that do not match the actual situation. These problems will lead to a long time to find the cables, resulting in a tight construction period, and also affect the accuracy of finding the cables. The mistaken removal of cables can easily cause abnormal events such as protection malfunction, which brings great trouble to the on-site work of relay protection.

[0004] Therefore, how to replace the secondary cable without affecting the relay protection work has become a technical problem that needs to be solved urgently. [Summary of the invention]

[0005] The embodiments of the present application provide a secondary cable replacement device and method and a computer-readable storage medium, which aim to solve the technical problems of tight construction period and accidental removal of cables caused by difficulty in finding cables during the process of replacing secondary cables without power outage in the related art.

[0006] In a first aspect, an embodiment of the present application provides a secondary cable replacement device, comprising:

[0007] The adapter module includes a first switch, wherein when the first switch is configured to be in a closed state, a first end of the adapter module is connected to a line protection device of a secondary cable to be replaced, and a second end of the adapter module is connected to a first end of an original power supply connection module;

[0008] The original power supply connection module comprises a second switch, wherein when the second switch is configured to be in a closed state, the second end of the original power supply connection module is connected to the original power supply;

[0009] A bypass power supply connection module, wherein a first end of the bypass power supply connection module is connected to a third end of the adapter module, and the bypass power supply connection module comprises a third switch, and when the third switch is configured to be in a closed state, a second end of the bypass power supply connection module is connected to a bypass power supply;

[0010] A secondary cable replacement controller is connected to the first switch, the second switch and the third switch, and is used to receive a secondary cable replacement instruction, and based on the secondary cable replacement instruction, successively switch the line protection device from an initial original power supply state to a dual power supply state, a bypass power supply state, a dual power supply state and an original power supply state, wherein:

[0011] In the original power supply state, the first switch and the second switch are configured to be in a closed state, and the third switch is configured to be in an open state;

[0012] In the dual power supply state, the first switch, the second switch and the third switch are all configured to be in a closed state;

[0013] In the bypass power supply state, the first switch and the third switch are configured to be in a closed state, and the second switch is configured to be in an open state.

[0014] In one embodiment of the present application, optionally, the switching module includes:

[0015] An intermediate relay, wherein a first end of the intermediate relay is connected to the first switch, and a second end of the intermediate relay is connected to a first end of the bypass power supply connection module.

[0016] In one embodiment of the present application, optionally, the secondary cable replacement device further includes:

[0017] The first live cable identification module includes a secondary cable contact portion. When any secondary cable of the line protection device is configured to contact the secondary cable contact portion, the first live cable identification module generates secondary cable identification information.

[0018] In one embodiment of the present application, optionally, the secondary cable replacement device further includes:

[0019] The positive and negative pole wiring detection module is connected to the path where the original power supply connection module is located, and is configured to transmit a low-frequency characteristic current to the path where the original power supply connection module is located.

[0020] The second powered identification module is connected to the path where multiple power supply connection modules to be tested, including the original power supply connection module, are located, and is configured to identify whether the path where each of the multiple power supply connection modules to be tested is located has a real-time characteristic current consistent with the low-frequency characteristic current, and send the identification result to the positive and negative pole wiring detection module.

[0021] Then the positive and negative pole wiring detection module is further configured as follows:

[0022] If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, it is determined that the positive and negative poles of the original power supply connection module are correctly wired; and if a real-time characteristic current is detected in both the path where the original power supply connection module is located and the path where any other power supply connection module other than the original power supply connection module among the multiple power supply connection modules to be tested is located, it is determined that the positive and negative poles of the original power supply connection module and the other power supply connection modules are incorrectly wired.

[0023] In one embodiment of the present application, optionally, the positive and negative pole wiring detection module is connected to the first end of the original power supply connection module; or the positive and negative pole wiring detection module is connected to the line protection device of the secondary cable to be replaced which is supplied with current by the original power supply connection module.

[0024] In one embodiment of the present application, optionally, the second live identification module includes a plurality of live identification sub-modules, and the plurality of live identification sub-modules are respectively connected to the passages where the plurality of power supply connection modules to be tested are located.

[0025] In one embodiment of the present application, optionally, the secondary cable replacement device further includes:

[0026] An additional power supply connection module, the additional power supply connection module is used to supply power to at least two line protection devices, and the original power supply connection module is used to supply power to at least two line protection devices, and the at least two line protection devices powered by the original power supply connection module and the at least two line protection devices powered by the additional power supply connection module have an intersection.

[0027] The loop wiring detection module is connected to any line protection device outside the intersection that is powered by the original power supply connection module, and is configured to provide a low-frequency characteristic current to any line protection device outside the intersection that is powered by the original power supply connection module.

[0028] The third powered identification module is connected to the path including the original power supply connection module and the additional power supply connection module, and is configured to identify whether the path including the original power supply connection module and the additional power supply connection module has a real-time characteristic current consistent with the low-frequency characteristic current, and send the identification result to the loop wiring detection module.

[0029] Then the loop wiring detection module is further configured as follows:

[0030] If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, it is determined that the wiring of the loop where the original power supply connection module is located is correct, and

[0031] If real-time characteristic currents are detected in the paths where the original power supply connection module and the additional power supply connection module are respectively located, and the sum of the real-time characteristic currents in the paths where the original power supply connection module and the additional power supply connection module are respectively located is consistent with the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and the additional power supply connection module; and

[0032] If only the path where the original power supply connection module is located detects the real-time characteristic current, and the real-time characteristic current is less than the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and an unknown power supply connection module other than the additional power supply connection module; and

[0033] If real-time characteristic currents are detected in the paths where the original power supply connection module and the additional power supply connection module are respectively located, and the sum of the real-time characteristic currents in the paths where the original power supply connection module and the additional power supply connection module are respectively located is less than the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and the additional power supply connection module and an unknown power supply connection module other than the additional power supply connection module.

[0034] In one embodiment of the present application, optionally, the bypass power supply connection module includes:

[0035] A bypass connection detection circuit, which is connected in parallel with the switching module, includes a fourth switch and at least one indicating load, wherein:

[0036] When the fourth switch is configured to be in a closed state, the bypass connection detection circuit is connected to the bypass power supply.

[0037] In one embodiment of the present application, optionally, the secondary cable replacement controller is also connected to the fourth switch, and is used to control the fourth switch to close after receiving the secondary cable replacement instruction, and before switching the line protection device from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence, and detect whether the indication load issues a connectivity indication after the fourth switch, and when it is detected that the indication load issues a connectivity indication, switch the line protection device from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence.

[0038] In one embodiment of the present application, optionally, the line protection device is N265-931.

[0039] In a second aspect, an embodiment of the present application provides a secondary cable replacement method, which is applied to a secondary cable replacement device described in any one of the first aspects above, and the method includes:

[0040] Receive secondary cable replacement instructions;

[0041] Based on the secondary cable replacement instruction, the line protection device is switched from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence, wherein:

[0042] In the bypass power supply state, the line protection device is configured to be in a safe state capable of receiving a secondary cable replacement operation.

[0043] In one embodiment of the present application, optionally, before the line protection device is switched from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence, it further includes:

[0044] When it is detected that any secondary cable of the line protection device is configured to contact the secondary cable contact part in the first live identification module, corresponding secondary cable identification information is acquired, where the secondary cable identification information is used to reflect the polarity of the secondary cable.

[0045] In one embodiment of the present application, optionally, before the line protection device is switched from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence, it further includes:

[0046] closing the fourth switch;

[0047] Detecting whether an indicating load in a bypass connection detection circuit issues a connection indication;

[0048] When it is detected that the indicating load issues a connection indication, the step of switching the line protection device from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state is allowed.

[0049] In one embodiment of the present application, optionally, the method further includes:

[0050] Transmitting a low-frequency characteristic current to the path where the original power supply connection module is located;

[0051] Identify whether the paths where the multiple power supply connection modules to be tested, including the original power supply connection module, are located have real-time characteristic currents that are consistent with the low-frequency characteristic current;

[0052] If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, it is determined that the positive and negative poles of the original power supply connection module are correctly connected;

[0053] If real-time characteristic current is detected in the path where the original power supply connection module is located and in the path where any other power supply connection module other than the original power supply connection module among the multiple power supply connection modules to be tested is located, it is determined that a positive and negative pole wiring error occurs between the original power supply connection module and the other power supply connection modules.

[0054] In one embodiment of the present application, optionally, the method further includes:

[0055] Providing a low-frequency characteristic current to any line protection device powered by the original power supply connection module and outside the intersection of the line protection devices of the original power supply connection module and the additional power supply connection module;

[0056] Identify whether the paths where the original power supply connection module and the additional power supply connection module are located have real-time characteristic currents that are consistent with the low-frequency characteristic current;

[0057] If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, it is determined that the wiring of the loop where the original power supply connection module is located is correct;

[0058] If real-time characteristic currents are detected in the paths where the original power supply connection module and the additional power supply connection module are respectively located, and the sum of the real-time characteristic currents in the paths where the original power supply connection module and the additional power supply connection module are respectively located is consistent with the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and the additional power supply connection module;

[0059] If only the path where the original power supply connection module is located detects the real-time characteristic current, and the real-time characteristic current is less than the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and an unknown power supply connection module other than the additional power supply connection module;

[0060] If real-time characteristic currents are detected in the paths where the original power supply connection module and the additional power supply connection module are respectively located, and the sum of the real-time characteristic currents in the paths where the original power supply connection module and the additional power supply connection module are respectively located is less than the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and the additional power supply connection module and an unknown power supply connection module other than the additional power supply connection module.

[0061] In a third aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the method described in the second aspect above.

[0062] The above technical scheme aims to solve the technical problems of tight construction period and accidental removal of cables caused by the difficulty in finding cables during the process of replacing secondary cables without power outage. By automatically switching the on and off states of the first switch, the second switch and the third switch, the line protection device is always in an effective working state where it can obtain power, and power outages will not occur during the process of replacing the secondary cables. While ensuring that the line protection device's protection function for the power system continues uninterrupted, the difficulty and error rate of cable finding are reduced, thereby providing effective support for on-site relay protection work.

Brief Description of the Drawings

[0063] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0064] Figure 1 A block diagram of a secondary cable replacement device according to an embodiment of the present application is shown;

[0065] Figure 2 A flow chart showing a secondary cable replacement method according to an embodiment of the present application is shown;

[0066] Figure 3 A block diagram of a secondary cable replacement device according to another embodiment of the present application is shown;

[0067] Figure 4 A block diagram of a secondary cable replacement device according to another embodiment of the present application is shown;

[0068] Figure 5 A schematic diagram of detecting positive and negative pole wiring errors on the device side according to an embodiment of the present application is shown;

[0069] Figure 6 A schematic diagram of detecting positive and negative pole wiring errors on the feeder side according to an embodiment of the present application is shown;

[0070] Figure 7 A schematic diagram of loop wiring error detection according to an embodiment of the present application is shown;

[0071] Figure 8 A block diagram of a computer device according to an embodiment of the present application is shown;

[0072] Fig. 9 A block diagram of a computer device according to an embodiment of the present application is shown. [Specific implementation method]

[0073] 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 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.

[0074] Figure 1 A block diagram of a secondary cable replacement device according to an embodiment of the present application is shown.

[0075] like Figure 1 As shown, a secondary cable replacement device 100 according to an embodiment of the present application includes: a switching module 102 , an original power supply connection module 104 , a bypass power supply connection module 106 and a secondary cable replacement controller 108 .

[0076] Among them, the adapter module 102 includes a first switch 1022. When the first switch 1022 is configured to be in a closed state, the first end of the adapter module 102 is connected to the line protection device of the secondary cable to be replaced, and the second end of the adapter module 102 is connected to the first end of the original power supply connection module 104.

[0077] Secondary cables refer to cables used for control, signal transmission and feedback, such as motor operating column control cables, metering, protection, and electrical communication cables. The line protection device of the secondary cable to be replaced is a device used to safely protect the lines in the power system, including but not limited to any module with line protection function in the DC system cabinet, protection and measurement cabinet, etc., which are used to monitor power system anomalies and faults and make timely and correct responses.

[0078] In one embodiment of the present application, optionally, the line protection device is N265-931. Of course, the line protection device can also be any other device with a line protection function, and is not limited to this example.

[0079] The original power supply connection module 104 includes a second switch 1042 . When the second switch 1042 is configured to be in a closed state, a second end of the original power supply connection module 104 is connected to the original power supply.

[0080] The first end of the bypass power supply connection module 106 is connected to the third end of the adapter module 102. The bypass power supply connection module 106 includes a third switch 1062. When the third switch 1062 is configured to be in a closed state, the second end of the bypass power supply connection module 106 is connected to the bypass power supply.

[0081] The secondary cable replacement controller 108 is connected to the first switch 1022, the second switch 1042 and the third switch 1062, and is used to receive a secondary cable replacement instruction, and based on the secondary cable replacement instruction, switch the line protection device from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence.

[0082] As can be seen from the above, the line protection device is connected to the original power supply via the conversion module and the original power supply connection module 104, and the original power supply supplies power to the line protection device during the line protection device performs protection work. At the same time, the line protection device is connected to the bypass power supply via the conversion module and the bypass power supply connection module 106, and the bypass power supply is used to supply power to the line protection device when the secondary cable needs to be replaced for the line protection device.

[0083] In which, in the original power supply state, the first switch 1022 and the second switch 1042 are configured to be in a closed state, and the third switch 1062 is configured to be in an open state; in the dual power supply state, the first switch 1022, the second switch 1042 and the third switch 1062 are all configured to be in a closed state; in the bypass power supply state, the first switch 1022 and the third switch 1062 are configured to be in a closed state, and the second switch 1042 is configured to be in an open state.

[0084] The line protection device is switched from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence. Specifically, during the operation of the line protection device, based on the received secondary cable replacement instruction, the first switch 1022, the second switch 1042 and the third switch 1062 are first configured to be in a closed state, so that the line protection device is connected to the original power supply and the bypass power supply through the switching module 102. Then, the first switch 1022 and the third switch 1062 are configured to be in a closed state, and the second switch 1042 is configured to be in an open state, that is, the connection between the line protection device and the original power supply is automatically disconnected, and the line protection device is powered only by the bypass power supply. At this point, the secondary cable replacement operation can be performed. Then, the first switch 1022, the second switch 1042 and the third switch 1062 are configured to be in a closed state, so that the line protection device is reconnected to the original power supply. Finally, the first switch 1022 and the third switch 1062 are configured to be in a closed state again, and the second switch 1042 is configured to be in an open state, so as to disconnect the line protection device from the bypass power supply.

[0085] The above technical solution, by automatically switching the opening and closing states of the first switch 1022, the second switch 1042 and the third switch 1062, ensures that the line protection device is always in an effective working state where it can obtain power supply, and no power outage occurs during the replacement of the secondary cable. While ensuring that the line protection device continues to protect the power system, it avoids the problem of long cable search time due to the lack of drawings, labels or mismatched labels that do not match the actual situation, thereby reducing the difficulty of cable search and the error rate of search, and providing effective support for the on-site work of relay protection. At the same time, the above technical solution replaces the manual switching operation with the automatic switching of the opening and closing of each switch, thereby improving the safety and replacement efficiency of the secondary cable replacement process.

[0086] In a possible design, the switching module 102 includes: an intermediate relay, a first end of the intermediate relay is connected to the first switch 1022, and a second end of the intermediate relay is connected to a first end of the bypass power supply connection module 106. The intermediate relay is used to transmit an intermediate signal in the control circuit, is connected between the line protection device and the bypass power supply, and has a circuit protection function when the line protection device is disconnected from the bypass power supply.

[0087] In one possible design, the secondary cable replacement device 100 also includes: a first live cable identification module, including a secondary cable contact part, and when any secondary cable of the line protection device is configured to contact the secondary cable contact part, the first live cable identification module generates secondary cable identification information.

[0088] The first live identification module can identify the polarity of each secondary cable before replacing the secondary cable, providing a guarantee for the safe replacement of the secondary cable.

[0089] In a possible design, the secondary cable replacement device also includes: a positive and negative pole wiring detection module and a second charged identification module.

[0090] The positive and negative pole wiring detection module is connected to the path where the original power supply connection module is located, and is configured to transmit a low-frequency characteristic current to the path where the original power supply connection module is located. The second live identification module is connected to the path where multiple power supply connection modules to be tested, including the original power supply connection module, are located, and is configured to identify whether the paths where the multiple power supply connection modules to be tested are located have real-time characteristic currents consistent with the low-frequency characteristic current, and send the identification results to the positive and negative pole wiring detection module.

[0091] On this basis, the positive and negative pole wiring detection module is also configured as follows:

[0092] If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, this indicates that the path where the original power supply connection module is located does not lead to the paths where other power supply connection modules to be tested are located, and no current shunting occurs. Therefore, it can be determined that the positive and negative poles of the original power supply connection module are correctly wired, that is, the positive and negative poles of the original power supply connection module are not mixed with the positive and negative poles of other power supply connection modules to be tested.

[0093] The positive and negative pole wiring detection module is also configured as follows:

[0094] If real-time characteristic current is detected in the path where the original power supply connection module is located and in the path where any other power supply connection module among the multiple power supply connection modules to be tested is located except the original power supply connection module, it means that the original low-frequency characteristic current is diverted to the path where other power supply connection modules to be tested are located through the path where the original power supply connection module is located, and there is a possibility that the positive and negative poles of the original power supply connection module and the positive and negative poles of the other power supply connection modules are confused, that is, a positive and negative pole wiring error occurs.

[0095] The above technical solution can identify whether the original power supply connection module has a positive and negative wiring fault by whether the low-frequency characteristic current can be undivided in the path where the original power supply connection module is located. Therefore, the wiring processing efficiency and processing accuracy of the positive and negative wiring faults in the secondary cable replacement process can be further improved.

[0096] In one embodiment of the present application, optionally, the positive and negative pole wiring detection module is connected to the first end of the original power supply connection module.

[0097] In another embodiment of the present application, optionally, the positive and negative pole wiring detection module is connected to the line protection device of the secondary cable to be replaced which is supplied with current by the original power supply connection module.

[0098] In one embodiment of the present application, optionally, the second live identification module includes a plurality of live identification sub-modules, and the plurality of live identification sub-modules are respectively connected to the passages where the plurality of power supply connection modules to be tested are located.

[0099] In a possible design, the secondary cable replacement device further includes: an additional power supply connection module, a third live identification module and a loop wiring detection module.

[0100] The additional power supply connection module is used to supply power to at least two line protection devices, and the original power supply connection module is used to supply power to at least two line protection devices, and the at least two line protection devices supplied by the original power supply connection module and the at least two line protection devices supplied by the additional power supply connection module have an intersection. That is, the additional power supply connection module and the original power supply connection module are connected to at least one of the same line protection devices.

[0101] The loop wiring detection module is connected to any line protection device outside the intersection powered by the original power supply connection module, and is configured to provide a low-frequency characteristic current to any line protection device outside the intersection powered by the original power supply connection module.

[0102] The third powered identification module is connected to the path including the original power supply connection module and the additional power supply connection module, and is configured to identify whether the path including the original power supply connection module and the additional power supply connection module has a real-time characteristic current consistent with the low-frequency characteristic current, and send the identification result to the loop wiring detection module.

[0103] On this basis, the loop wiring detection module is further configured as follows:

[0104] If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, it means that the original low-frequency characteristic current has not been diverted to the path where the additional power supply connection module is located through the path where the original power supply connection module is located, and it is determined that the loop wiring where the original power supply connection module is located is correct.

[0105] The loop wiring detection module is further configured to:

[0106] If real-time characteristic currents are detected in the paths where the original power supply connection module and the additional power supply connection module are respectively located, and the sum of the real-time characteristic currents in the paths where the original power supply connection module and the additional power supply connection module are respectively located is consistent with the low-frequency characteristic current, it means that the original low-frequency characteristic current is shunted through the path where the original power supply connection module is located to and only to the path where the additional power supply connection module is located, then the loop wiring error of the original power supply connection module only exists between the original power supply connection module and the additional power supply connection module, that is, it is determined that a loop wiring error occurs between the original power supply connection module and the additional power supply connection module.

[0107] The loop wiring detection module is further configured to:

[0108] If only the real-time characteristic current is detected in the path where the original power supply connection module is located, and the real-time characteristic current is smaller than the low-frequency characteristic current, it means that the original low-frequency characteristic current is diverted through the path where the original power supply connection module is located, but is not diverted to the path where the additional power supply connection module is located. Therefore, the original low-frequency characteristic current is diverted to an unknown power supply connection module other than the additional power supply connection module after passing through the path where the original power supply connection module is located. At this time, it is determined that a loop wiring error occurs between the original power supply connection module and an unknown power supply connection module other than the additional power supply connection module.

[0109] The loop wiring detection module is further configured to:

[0110] If real-time characteristic currents are detected in the paths where the original power supply connection module and the additional power supply connection module are respectively located, and the sum of the real-time characteristic currents in the paths where the original power supply connection module and the additional power supply connection module are respectively located is less than the low-frequency characteristic current, it means that the original low-frequency characteristic current is shunted to the path where the additional power supply connection module is located through the path where the original power supply connection module is located, but at the same time it is also shunted to an unknown power supply connection module other than the additional power supply connection module. At this time, a loop wiring error occurs between the original power supply connection module and the additional power supply connection module and an unknown power supply connection module other than the additional power supply connection module, that is, it is determined that a loop wiring error occurs between the original power supply connection module and the additional power supply connection module and an unknown power supply connection module other than the additional power supply connection module.

[0111] The above technical solution can automatically determine whether the original power supply connection module has a loop wiring error and the objects involved when the loop wiring error occurs by automatically determining whether the low-frequency characteristic current is shunted after passing through the path where the original power supply connection module is located and the shunting situation when shunting. This can further improve the wiring processing efficiency and processing accuracy during the secondary cable replacement process.

[0112] Figure 2 A flow chart of a secondary cable replacement method according to an embodiment of the present application is shown.

[0113] like Figure 2 As shown, combined Figure 1 The secondary cable replacement device 100 shown, according to an embodiment of the present application, the secondary cable replacement method includes:

[0114] Step 202: Receive a secondary cable replacement instruction.

[0115] Step 204, based on the secondary cable replacement instruction, the line protection device is switched from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence, wherein in the bypass power supply state, the line protection device is configured to be in a safe state that can receive the secondary cable replacement operation.

[0116] Before step 204, the method further includes: when it is detected that any secondary cable of the line protection device is configured to contact the secondary cable contact part in the first live identification module, obtaining corresponding secondary cable identification information, wherein the secondary cable identification information is used to reflect the polarity of the secondary cable. In other words, the polarity of each secondary cable can be identified before replacing the secondary cable through the first live identification module, thereby providing a guarantee for the safe replacement of the secondary cable.

[0117] In one possible design, the bypass power supply connection module includes: a bypass connectivity detection circuit, which is connected in parallel with the adapter module, including a fourth switch and at least one indicating load, wherein when the fourth switch is configured to be in a closed state, the bypass connectivity detection circuit is connected to the bypass power supply.

[0118] Before step 204, the method further includes: closing the fourth switch; detecting whether the indicating load in the bypass connection detection circuit issues a connection indication; and allowing the method to enter step 204 if it is detected that the indicating load issues a connection indication.

[0119] The bypass connection detection circuit is connected in parallel with the adapter module. When the fourth switch is closed, if the bypass connection detection circuit and the bypass power supply are in a valid path, it indicates that the bypass power supply is a valid power supply. The indicating load will send indication information when powered on, and the indication information is used to reflect that the bypass connection detection circuit and the bypass power supply are in a valid path.

[0120] Optionally, the indicating load is a light emitting device and / or a sound emitting device.

[0121] In one possible design, an indication load can also be set at the output end of the original power supply, which is used to send indication information when the original power supply supplies power to the cable to be replaced or the new secondary cable. The indication information reflects that there is an effective path between the original power supply and the cable to be replaced or the original power supply and the new secondary cable.

[0122] In one possible design, the secondary cable replacement controller is also connected to the fourth switch, and is used to control the fourth switch to close after receiving the secondary cable replacement instruction, before switching the line protection device from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence, and detect whether the indication load issues a connectivity indication after the fourth switch; when it is detected that the indication load issues a connectivity indication, the line protection device is switched from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence.

[0123] That is to say, before replacing the secondary cable, it is necessary to pre-detect whether the bypass connection detection circuit and the bypass power supply are a valid path to achieve a pre-judgment of the feasibility of replacing the secondary cable. Only when it is detected that the bypass connection detection circuit and the bypass power supply are a valid path, that is, when it is determined that the bypass power supply is a valid power supply, the control process of each switch state is entered to achieve the replacement of the secondary cable.

[0124] In one embodiment of the present application, optionally, the method further includes:

[0125] Transmitting a low-frequency characteristic current to the path where the original power supply connection module is located;

[0126] Identify whether the paths where the multiple power supply connection modules to be tested, including the original power supply connection module, are located have real-time characteristic currents that are consistent with the low-frequency characteristic current;

[0127] If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, it is determined that the positive and negative poles of the original power supply connection module are correctly connected;

[0128] If real-time characteristic current is detected in the path where the original power supply connection module is located and in the path where any other power supply connection module other than the original power supply connection module among the multiple power supply connection modules to be tested is located, it is determined that a positive and negative pole wiring error occurs between the original power supply connection module and the other power supply connection modules.

[0129] The above technical solution can identify whether the original power supply connection module has a positive and negative wiring fault by whether the low-frequency characteristic current can be undivided in the path where the original power supply connection module is located. Therefore, the wiring processing efficiency and processing accuracy of the positive and negative wiring faults in the secondary cable replacement process can be further improved.

[0130] In one embodiment of the present application, optionally, the method further includes:

[0131] Providing a low-frequency characteristic current to any line protection device powered by the original power supply connection module and outside the intersection of the line protection devices of the original power supply connection module and the additional power supply connection module;

[0132] Identify whether the paths where the original power supply connection module and the additional power supply connection module are located have real-time characteristic currents that are consistent with the low-frequency characteristic current;

[0133] If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, it is determined that the wiring of the loop where the original power supply connection module is located is correct;

[0134] If real-time characteristic currents are detected in the paths where the original power supply connection module and the additional power supply connection module are respectively located, and the sum of the real-time characteristic currents in the paths where the original power supply connection module and the additional power supply connection module are respectively located is consistent with the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and the additional power supply connection module;

[0135] If only the path where the original power supply connection module is located detects the real-time characteristic current, and the real-time characteristic current is less than the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and an unknown power supply connection module other than the additional power supply connection module;

[0136] If real-time characteristic currents are detected in the paths where the original power supply connection module and the additional power supply connection module are respectively located, and the sum of the real-time characteristic currents in the paths where the original power supply connection module and the additional power supply connection module are respectively located is less than the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and the additional power supply connection module and an unknown power supply connection module other than the additional power supply connection module.

[0137] The above technical solution can automatically determine whether the original power supply connection module has a loop wiring error and the objects involved when the loop wiring error occurs by automatically determining whether the low-frequency characteristic current is shunted after passing through the path where the original power supply connection module is located and the shunting situation when shunting. This can further improve the wiring processing efficiency and processing accuracy during the secondary cable replacement process.

[0138] Figure 3 A block diagram of a secondary cable replacement device according to another embodiment of the present application is shown.

[0139] like Figure 3 As shown in the figure, when replacing the secondary cable of the protection device N256-931, it is necessary to replace the original power cable with a new cable without shutting down the protection device N256-931. The steps for replacing the secondary cable of the protection device N256-931 without shutting down the power are as follows:

[0140] S301. Use the secondary cable live identification instrument to correctly identify the secondary cable of the protection device N256-931 to prevent cable core crossing errors and ensure that the circuit breaker name is consistent with the corresponding cable.

[0141] S302. Lead out a bypass power supply from the feeder panel and connect it to the power terminal of the protection device N256-931 through the bypass power switch KP, bypass cable and universal adapter ZJ.

[0142] S303, a bypass outlet line is led out from the outlet terminal of the bypass power supply, and is connected in parallel with the bypass power supply through the bypass outlet line switch KP1 and the bypass on / off indicator lights L1 and L2.

[0143] S304, control the bypass outlet switch KP1 to close, the bypass on / off indicator lights L1 and L2 light up, and at the same time, the current on the clamp meter CT changes by about 0.43A, and the bypass is in the on state.

[0144] S305, control the bypass outlet switch KP1 to disconnect, and the pointer of the clamp meter CT falls back.

[0145] S306, control the bypass power switch KP to close, and the protection device N256-931 is in the dual power supply state.

[0146] S307, control the original power cable switch KK to disconnect, and the operating indicator light of the protection device N256-931 still indicates the operating status.

[0147] S308. Disconnect the original power cable of the control protection device N256-931, replace it with a new secondary cable and reconnect it to the protection device N256-931.

[0148] S309, control the new power cable switch KK to close, and the protection device N256-931 is in dual power supply state.

[0149] S310, control the bypass power switch KP to close, the operation indicator light of the protection device N256-931 still indicates the operating status, and the new secondary power cable is put into operation.

[0150] Furthermore, the above-mentioned method of replacing secondary cables without power outage can be applied to any secondary power equipment renovation work with renovation requirements, such as replacement of secondary devices, secondary panels, etc. without power outage.

[0151] Figure 4 A block diagram of a secondary cable replacement device according to yet another embodiment of the present application is shown.

[0152] like Figure 4 As shown in the figure, when replacing the secondary cable of the protection device N256-931, it is necessary to replace the original power cable with a new cable without shutting down the protection device N256-931. The steps for replacing the secondary cable of the protection device N256-931 without shutting down the power are as follows:

[0153] S401. Use the clamp ammeter principle to identify the live secondary cable, accurately find the secondary cable of the protection device N256-931, prevent the cable cores from crossing and make sure the circuit breaker name is consistent with the corresponding cable.

[0154] S402. Lead a bypass power supply from the feeder panel and connect it to the power terminal of the protection device N256-931 through the bypass power switch KP, bypass cable and universal adapter ZJT.

[0155] S403, a bypass outlet line is led out from the outlet terminal of the bypass power supply, and is connected in parallel with the bypass power supply through the bypass outlet line switch KP1 and the bypass on / off indicator lights L1 and L2.

[0156] S404, control the bypass outlet switch KP1 to close, the bypass on / off indicator lights L1 and L2 light up, and at the same time, the receiving instrument clamp meter CT shows a current change of about 0.43A, and the bypass is in the on state.

[0157] S405. Control the bypass output switch KP1 to disconnect. If the current indication of the receiving clamp meter CT decreases, the bypass power supply has reliably supplied power to the protection device N256-931.

[0158] S406, control the bypass power switch KP to close, and the protection device N256-931 is in the dual power supply state.

[0159] S407, control the original power cable switch KK to disconnect, the operating indicator light of the protection device N256-931 still indicates the operating status, and the position indicator light Lk of the switch KK is still in the lighted state.

[0160] S408, control the original power cable of the protection device N256-931 to be disconnected, the position indicator light Lk of the switch KK is turned off, and the new secondary cable is controlled to be connected to the protection device N256-931.

[0161] S409, control the new power cable switch KK' to close. At this time, the position indicator light Lk' of the switch KK' is on, indicating that the protection device N256-931 is in the dual power supply state.

[0162] S410, control the bypass power switch KP to disconnect, and the operation indicator light of the protection device N256-931 still indicates the operating status, indicating that the new secondary power cable is put into operation.

[0163] In addition, the above-mentioned method of replacing secondary cables without power outage can be applied to any secondary power equipment renovation work with renovation requirements, such as replacement of secondary devices, secondary panels, etc. without power outage.

[0164] Figure 5 A schematic diagram of device-side positive and negative wiring error detection according to an embodiment of the present application is shown, wherein KKa is the power switch of feeder branch 1, KKb is the power switch of feeder branch 2, CT11 and CT12 are the first set of receiver clamp current meters, CT21 and CT22 are the second set of receiver clamp current meters, ZJT is an adapter, KK1 is the power switch of device 1, and KK2 is the power switch of device 2. Device 1 and device 2 can be selected as protection device N256-931.

[0165] like Figure 5 As shown, when detecting whether the positive and negative poles on the device side are connected incorrectly, the following steps are included:

[0166] S501, connect to the secondary cable identification instrument through adapter ZJT.

[0167] S502. Control the secondary cable identification instrument to emit a low-frequency characteristic current that will not interfere with system operation.

[0168] S503 , obtaining current detection results of the first set of receiving instrument clamp ammeters CT11 and CT12 and the second set of receiving instrument clamp ammeters CT21 and CT22 .

[0169] S504. If only the current detection result of the clamp ammeters CT21 and CT22 of the second set of receiving instruments is a real-time characteristic current with the same magnitude as the low-frequency characteristic current, it is determined that there is no positive and negative cross wiring error between device 1 and device 2.

[0170] S505. If the current detection results of the first set of receiving instrument clamp ammeters CT11 and CT12 and the current detection results of the second set of receiving instrument clamp ammeters CT21 and CT22 both detect a certain characteristic current, it is determined that there is a positive and negative cross wiring error between device 1 and device 2.

[0171] Figure 6 A schematic diagram of detecting positive and negative pole wiring errors on the feeder side according to an embodiment of the present application is shown, and the detection steps are similar to those in FIG. Figure 5 The same is shown and will not be repeated here.

[0172] Figure 7 A schematic diagram of loop wiring error detection according to an embodiment of the present application is shown.

[0173] like Figure 7 As shown, K1 is the power switch of feeder branch 1; K2 is the power switch of feeder branch 2; K3 is the closing point; CT11 and CT12 are the first set of receiver clamp current meters; CT21 and CT22 are the second set of receiver clamp current meters; ZJT is the adapter; KK1 is the power switch of device 1; KK2 is the power switch of device 2; KK3 is the power switch of device 3. Among them, device 1, device 2, and device 3 can be selected as protection device N256-931.

[0174] like Figure 7 As shown, in normal operation, switches K1, K2, and K3 cannot be in the closed position at the same time, that is, there are three feasible operation modes:

[0175] ①Switches K1 and K2 are in the closed position, and K3 is in the open position;

[0176] ②Switches K1 and K3 are in the closed position, and K2 is in the open position;

[0177] ③Switches K2 and K3 are in the closed position, and K1 is in the open position.

[0178] If switches K1, K2, and K3 are in the closed position at the same time, the system is in loop wiring mode. It is necessary to accurately determine the number of power supply lines and find the closing point for disconnection. The specific steps for loop wiring search are as follows:

[0179] S701, connect to the secondary cable identification instrument through adapter ZJT.

[0180] S702. Control the secondary cable identification instrument to emit a low-frequency characteristic current that will not cause interference.

[0181] S703, obtaining current detection results of the first set of receiving instrument clamp ammeters CT11, CT12 and the second set of receiving instrument clamp ammeters CT21, CT22.

[0182] S704. If only the current detection result of the second set of receiving instrument clamp ammeters CT21 and CT22 is that the real-time characteristic current with the same magnitude as the low-frequency characteristic current is detected, it means that there is no loop connection between device 1, device 2, and device 3.

[0183] S705. If only the current detection results of the second set of receiving instrument clamp ammeters CT21 and CT22 detect the real-time characteristic current, but the real-time characteristic current is smaller than the low-frequency characteristic current, it means that the system composed of device 1, device 2, and device 3 has other feeder branches besides feeder branch 1 and feeder branch 2, and further search is required.

[0184] S706. If the current detection results of the first set of receiving instrument clamp ammeters CT11, CT12 and the second set of receiving instrument clamp ammeters CT21, CT22 are both real-time characteristic currents, and the sum of the real-time characteristic currents of the two is a low-frequency characteristic current, it means that there is a loop connection between device 1, device 2, and device 3, and it is necessary to further find the closing point K3 and then release the loop.

[0185] S707. If the current detection results of the first set of receiving instrument clamp ammeters CT11, CT12 and the second set of receiving instrument clamp ammeters CT21, CT22 are both real-time characteristic currents, and the sum of the real-time characteristic currents of the two is lower than the low-frequency characteristic current, it means that the system composed of device 1, device 2, and device 3 has loop wiring, and there are other feeder branches besides feeder branch 1 and feeder branch 2, which need to be further searched.

[0186] In one possible design, Figures 3 to 7 The steps in the illustrated embodiment are performed by manual operation.

[0187] In another possible design, Figures 3 to 7 The steps in the illustrated embodiment are executed in response to a control command after the controller issues a control command.

[0188] The above technical solution, through the bypass power switch connected to the feeder panel, automatically connects to the bypass power supply from the feeder panel, and then supplies power to the device whose secondary cable is to be replaced through the universal adapter, so that the secondary cable of the device can be replaced without power interruption. This technical solution can improve the maintenance efficiency of the power system while ensuring the safe and stable operation of the power system.

[0189] In another embodiment of the present application, the power terminal of the line protection device can be found on the secondary panel cabinet. At the same time, a high-precision clamp meter is mounted on the outlet terminal of the original power cable that supplies electricity to the line protection device on the feeder panel, and a secondary cable live identifier is used to accurately identify and determine the positive and negative secondary cables of the line protection device to prevent cable core crossover errors. Next, a bypass power supply is automatically led out from the feeder panel, and one end of the bypass power supply is automatically connected to the power terminal of the line protection device through a universal adapter, and the other end is led out from the feeder panel through a bypass power switch, and the initial state of the bypass power switch is a split state. The bypass outlet terminal is connected in parallel with two incandescent lamp loads through the bypass outlet switch, and the initial state of the bypass outlet switch is a split state.

[0190] Next, close the bypass outlet switch, and judge that the bypass power supply can provide reliable temporary power supply for the line protection device by checking that the clamp meter indicates the correct change and the incandescent lamp is on. Disconnect the bypass outlet switch, the clamp meter drops back, and the incandescent lamp goes out.

[0191] At this point, the bypass power switch can be closed, and the original power cable and the bypass power supply can simultaneously supply power to the line protection device, providing a prerequisite for replacing the secondary cable without power outage. Disconnect the original power cable from the line protection device, replace the secondary cable led out from the feeder panel, and reconnect it to the line protection device after the replacement is completed. The line protection device can be powered by the new secondary cable and switch to normal operation, and the bypass power supply can be shut down.

[0192] The above technical scheme can connect the new secondary cable led out of the feeder panel to the device of the cable to be replaced without interrupting the power supply. The new secondary cable is put into use and the secondary cable to be replaced is retired, thereby realizing the replacement of the secondary cable without power outage. This application adds a bypass power switch and a universal adapter on the basis of the original panel cabinet wiring, and realizes the replacement of the secondary cable without power outage while ensuring low cost and high versatility and providing power for the line protection device of the cable to be replaced. In this way, it not only ensures that the protection function of the line protection device for the power system continues uninterrupted, but also avoids the problem of long cable search time due to the lack of drawings, labels or disordered labels that do not match the actual situation of some cables, reduces the difficulty of cable search and the error rate of search, provides effective support for on-site relay protection work, effectively ensures the stability of system operation, and improves the maintenance efficiency of the power system.

[0193] In addition, in one embodiment, the present application provides a computer device, which may be a server, and its internal structure diagram may be as follows: Figure 8 As shown. The computer device includes a processor, a memory, a network interface and a database connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile and / or volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external client via a network connection. When the computer program is executed by the processor, the secondary cable replacement method described in any of the above embodiments can be implemented.

[0194] In one embodiment, the present application further provides a computer device, which may be a client, and its internal structure diagram may be as follows: Fig. 9As shown. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external server through a network connection. When the computer program is executed by the processor, the secondary cable replacement method described in any of the above embodiments can be implemented.

[0195] Any of the above-mentioned computer devices in the embodiments of the present application may exist in various forms, including but not limited to:

[0196] (1) Mobile communication devices: These devices are characterized by their mobile communication functions and their main purpose is to provide voice and data communications. These terminals include: smart phones (such as iPhone), multimedia phones, functional phones, and low-end phones.

[0197] (2) Ultra-mobile personal computer devices: These devices fall into the category of personal computers, have computing and processing capabilities, and generally also have mobile Internet access features. These terminals include: PDA, MID and UMPC devices, such as iPad.

[0198] (3) Portable entertainment devices: These devices can display and play multimedia content. They include audio and video players (such as iPods), handheld game consoles, e-books, as well as smart toys, wearable devices, and portable car navigation devices.

[0199] (4) Server: A device that provides computing services. The server consists of a processor, hard disk, memory, system bus, etc. The server is similar to a general computer architecture, but because it needs to provide highly reliable services, it has higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0200] (5) Other electronic devices with data interaction functions.

[0201] In addition, an embodiment of the present application provides a computer-readable storage medium storing computer executable instructions, which are used to perform the following steps: receiving a secondary cable replacement instruction; based on the secondary cable replacement instruction, switching the line protection device from an initial original power supply state to a dual power supply state, a bypass power supply state, a dual power supply state and an original power supply state in sequence, wherein in the bypass power supply state, the line protection device is configured to be in a safe state that can receive a secondary cable replacement operation.

[0202] It should be noted that the above functions or steps that can be implemented by the computer-readable storage medium or computer device can refer to the relevant description in the aforementioned method embodiment. In order to avoid repetition, they will not be described one by one here.

[0203] The above describes in detail the technical solution of the present application in conjunction with the accompanying drawings. Through the technical solution of the present application, by automatically switching the opening and closing states of the first switch, the second switch, and the third switch, the line protection device is always in an effective working state where it can obtain power supply, and power outages will not occur during the replacement of the secondary cable. While ensuring that the line protection device continues to provide protection for the power system without interruption, it avoids the problem of long cable search time due to the lack of drawings, labels, or mismatched labels that do not match the actual situation for some cables, thereby reducing the difficulty of cable search and the search error rate, and providing effective support for relay protection on-site work. At the same time, the above technical solution replaces the manual switching operation with the automatic switching of the opening and closing of each switch, thereby improving the safety and replacement efficiency of the secondary cable replacement process.

[0204] It should be understood that although the terms first, second, etc. may be used to describe switches in the embodiments of the present application, the switches should not be limited to these terms. These terms are only used to distinguish switches from each other. For example, without departing from the scope of the embodiments of the present application, the first switch may also be referred to as the second switch, and similarly, the second switch may also be referred to as the first switch.

[0205] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0206] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0207] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0208] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0209] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A secondary cable replacement device, characterized in that: include: The adapter module includes a first switch, wherein when the first switch is configured to be in a closed state, a first end of the adapter module is connected to a line protection device of a secondary cable to be replaced, and a second end of the adapter module is connected to a first end of an original power supply connection module; The original power supply connection module comprises a second switch, wherein when the second switch is configured to be in a closed state, the second end of the original power supply connection module is connected to the original power supply; A bypass power supply connection module, wherein a first end of the bypass power supply connection module is connected to a third end of the adapter module, and the bypass power supply connection module comprises a third switch, and when the third switch is configured to be in a closed state, a second end of the bypass power supply connection module is connected to a bypass power supply; A secondary cable replacement controller is connected to the first switch, the second switch and the third switch, and is used to receive a secondary cable replacement instruction, and based on the secondary cable replacement instruction, successively switch the line protection device from an initial original power supply state to a dual power supply state, a bypass power supply state, a dual power supply state and an original power supply state, wherein: In the original power supply state, the first switch and the second switch are configured to be in a closed state, and the third switch is configured to be in an open state; In the dual power supply state, the first switch, the second switch and the third switch are all configured to be in a closed state; In the bypass power supply state, the first switch and the third switch are configured to be in a closed state, and the second switch is configured to be in an open state.

2. The secondary cable replacement device according to claim 1, characterized in that: The switching module comprises: An intermediate relay, wherein a first end of the intermediate relay is connected to the first switch, and a second end of the intermediate relay is connected to a first end of the bypass power supply connection module.

3. The secondary cable replacement device according to claim 1, characterized in that: Also includes: The first live cable identification module includes a secondary cable contact portion. When any secondary cable of the line protection device is configured to contact the secondary cable contact portion, the first live cable identification module generates secondary cable identification information.

4. The secondary cable replacement device according to claim 1, characterized in that: Also includes: A positive and negative pole wiring detection module is connected to the path where the original power supply connection module is located, and is configured to transmit a low-frequency characteristic current to the path where the original power supply connection module is located; A second live identification module is connected to the path where multiple power supply connection modules to be tested, including the original power supply connection module, are located, and is configured to identify whether the paths where the multiple power supply connection modules to be tested are located have real-time characteristic currents consistent with the low-frequency characteristic current, and send the identification results to the positive and negative pole wiring detection module; Then the positive and negative pole wiring detection module is further configured as follows: If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, it is determined that the positive and negative poles of the original power supply connection module are correctly wired; and if a real-time characteristic current is detected in both the path where the original power supply connection module is located and the path where any other power supply connection module other than the original power supply connection module among the multiple power supply connection modules to be tested is located, it is determined that the positive and negative poles of the original power supply connection module and the other power supply connection modules are incorrectly wired.

5. The secondary cable replacement device according to claim 4, characterized in that: The positive and negative pole wiring detection module is connected to the first end of the original power supply connection module; The positive and negative pole wiring detection module is connected to the line protection device of the secondary cable to be replaced which is supplied with current by the original power supply connection module.

6. The secondary cable replacement device according to claim 4, characterized in that: The second live power identification module includes a plurality of live power identification submodules, and the plurality of live power identification submodules are respectively connected to the passages where the plurality of power supply connection modules to be tested are located.

7. The secondary cable replacement device according to claim 1, characterized in that: Also includes: An additional power supply connection module, the additional power supply connection module is used to supply power to at least two line protection devices, and the original power supply connection module is used to supply power to at least two line protection devices, and the at least two line protection devices supplied by the original power supply connection module and the at least two line protection devices supplied by the additional power supply connection module have an intersection; A loop wiring detection module, connected to any line protection device outside the intersection and powered by the original power supply connection module, configured to provide a low-frequency characteristic current to any line protection device outside the intersection and powered by the original power supply connection module; A third live identification module is connected to the path including the original power supply connection module and the additional power supply connection module, and is configured to identify whether the path where the original power supply connection module and the additional power supply connection module are located has a real-time characteristic current consistent with the low-frequency characteristic current, and send the identification result to the loop wiring detection module; Then the loop wiring detection module is further configured as follows: If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, it is determined that the wiring of the loop where the original power supply connection module is located is correct; as well as If real-time characteristic currents are detected in the paths where the original power supply connection module and the additional power supply connection module are respectively located, and the sum of the real-time characteristic currents in the paths where the original power supply connection module and the additional power supply connection module are respectively located is consistent with the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and the additional power supply connection module; as well as If only the path where the original power supply connection module is located detects the real-time characteristic current, and the real-time characteristic current is less than the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and an unknown power supply connection module other than the additional power supply connection module; as well as If real-time characteristic currents are detected in the paths where the original power supply connection module and the additional power supply connection module are respectively located, and the sum of the real-time characteristic currents in the paths where the original power supply connection module and the additional power supply connection module are respectively located is less than the low-frequency characteristic current, it is determined that a loop wiring error occurs between the original power supply connection module and the additional power supply connection module and an unknown power supply connection module other than the additional power supply connection module.

8. A secondary cable replacement method, characterized in that: The secondary cable replacement device used in any one of claims 1 to 7 comprises: Receive secondary cable replacement instructions; Based on the secondary cable replacement instruction, the line protection device is switched from the initial original power supply state to the dual power supply state, the bypass power supply state, the dual power supply state and the original power supply state in sequence, wherein: In the bypass power supply state, the line protection device is configured to be in a safe state capable of receiving a secondary cable replacement operation.

9. The secondary cable replacement device according to claim 8, characterized in that: Also includes: Transmitting a low-frequency characteristic current to the path where the original power supply connection module is located; Identify whether the paths where the multiple power supply connection modules to be tested, including the original power supply connection module, are located have real-time characteristic currents that are consistent with the low-frequency characteristic current; If a real-time characteristic current consistent with the low-frequency characteristic current is detected only in the path where the original power supply connection module is located, it is determined that the positive and negative poles of the original power supply connection module are correctly connected; If real-time characteristic current is detected in the path where the original power supply connection module is located and in the path where any other power supply connection module other than the original power supply connection module among the multiple power supply connection modules to be tested is located, it is determined that a positive and negative pole wiring error occurs between the original power supply connection module and the other power supply connection modules.

10. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are used to execute the method according to claim 8 or 9.

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