Method, protector, power distribution device and system for realizing one-place tagging and two-place locking

Abstract

This specification discloses a protection method for implementing the sign-out at one location and the lock-out at two locations, the method comprising: receiving an electronic sign-out instruction, the electronic sign-out instruction being issued by a remote monitoring terminal or an on-site operation terminal; storing sign-out information corresponding to the electronic sign-out instruction; locking the closing operation of a power distribution device according to the electronic sign-out instruction; reading the sign-out information after the power distribution device is powered on again, and locking the closing operation of the power distribution device again according to the sign-out information. The method of the present invention solves the problem that the current power supply monitoring system cannot be synchronized with the on-site maintenance status when a communication link failure occurs, thereby improving the reliability of the system; achieving electronic sign-out and electronic de-signing through a remote monitoring terminal or an on-site operation terminal, thereby improving the flexibility of the system; achieving complete locking of the switch closing operation of the two locations after electronic sign-out at any location, thereby improving the safety of the system.

Description

Technical Field

[0001] The present specification relates to the field of power supply safety technology, and in particular to a method for implementing one-site signage and two-site lockout, a protector, a power distribution device, and a power supply monitoring system. Background Art

[0002] In the power supply system, when a line or a power device fails, it needs to be repaired in time. Electrical maintenance personnel need to perform on-site maintenance after power is cut off. If other personnel mistakenly send power to the maintenance site, it will cause safety accidents such as electric shock casualties or equipment damage. In order to reduce safety risks, on-site maintenance often follows the principles of "must hang a sign" and "whoever hangs the sign, whoever removes the sign", that is: before maintenance, on-site maintenance personnel must hang a visible safety maintenance sign on the power equipment as a warning. After the maintenance is completed, the person who hung the sign will remove the sign to prevent other personnel from mistakenly stopping / sending power.

[0003] In recent years, remote monitoring has been generally implemented in power supply systems. Through the monitoring system, the power equipment in the power supply system can be electronically hung with safety inspection signs (hereinafter referred to as electronic hanging signs) and electronically removed with safety inspection signs (hereinafter referred to as electronic removing signs).

[0004] However, the current power supply monitoring system still has the following two safety issues: First, after the electronic sign is posted, there is a sign in the monitoring system, and control instructions cannot be issued to the equipment during maintenance. However, the equipment can still be powered by manual operation on site, and any incorrect operation may still cause safety accidents; Second, the remote control of the monitoring system depends on the reliability and stability of the communication line. Once the communication link fails, the monitoring end cannot send instructions to the corresponding equipment for electronic sign posting and delisting. It can only be repaired by on-site maintenance personnel manually hanging warning signs. The monitoring system lacks the sign posting indication. If power is supplied by mistake after communication is restored, it will also cause safety accidents.

[0005] It can be seen that the current power supply monitoring system still has shortcomings that may cause safety accidents and is in urgent need of improvement. Summary of the invention

[0006] The present invention provides a protection method, a protector, a power distribution device and a power supply monitoring system for realizing one-place signage and two-place lockout, which are used to solve the safety problems existing in the current power supply monitoring system.

[0007] To solve the above technical problems, the present invention is achieved as follows:

[0008] In one aspect, the present invention provides a protection method for achieving one-place tagging and two-place locking, the method comprising:

[0009] Receiving an electronic sign-on instruction, the electronic sign-on instruction being issued by a remote monitoring terminal or an on-site operation terminal;

[0010] Storing the listing information corresponding to the electronic listing instruction;

[0011] Locking the closing operation of the power distribution device according to the electronic signboard instruction;

[0012] After the power distribution device is powered on again, the sign-out information is read, and the closing operation of the power distribution device is locked again according to the sign-out information.

[0013] In another aspect, the present invention provides a protector for achieving one-place tagging and two-place locking, comprising:

[0014] A receiving unit, used to receive an electronic sign-hanging instruction, wherein the electronic sign-hanging instruction is issued by a remote monitoring terminal or an on-site operation terminal;

[0015] A storage unit, used to store the listing information corresponding to the electronic listing instruction;

[0016] A locking unit, used for locking the closing operation of the power distribution device according to the electronic sign instruction;

[0017] The control unit is used to read the sign-out information after the power distribution device is powered on again, and to lock the closing operation of the power distribution device again according to the sign-out information.

[0018] On the other hand, the present invention further provides a power distribution device that can realize one-place tagging and two-place locking, and the power distribution device is provided with the protector as described above.

[0019] In another aspect, the present invention further provides a power supply monitoring system for realizing one-place tagging and two-place locking, comprising:

[0020] Remote monitoring terminal, on-site operation terminal, and protector installed in the power distribution device;

[0021] The protector is used to execute any of the aforementioned protection methods in response to instructions issued by the remote monitoring terminal and the on-site operation terminal.

[0022] The technical solution of the present invention can achieve the following beneficial effects:

[0023] (1) By storing the listing information and synchronizing it with the monitoring end, the problem that the current power supply monitoring system cannot synchronize with the on-site maintenance status when a communication link failure occurs is solved, thereby improving the reliability of the system;

[0024] (2) By responding to the electronic listing and delisting instructions issued by either the remote monitoring terminal or the on-site operation terminal, electronic listing and delisting can be achieved through the remote monitoring terminal or the on-site operation terminal, thereby improving the flexibility of the system;

[0025] (3) By means of hardware interlocking the closing circuit, the erroneous operation of power supply is prevented, and the closing operation of the switches at both locations is completely locked after electronic posting at either location, thereby improving the safety of the system.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 This is a schematic diagram of the structure of the coal mine power supply monitoring system;

[0029] Figure 2 A flow chart of a protection method for implementing one-location tagging and two-location locking provided in the first embodiment of the present invention;

[0030] Figure 3 Schematic diagram of an electronic sign-locking closing circuit in an embodiment of the present invention;

[0031] Figure 4 A flow chart of a protection method for implementing one-location tagging and two-location locking provided in a second embodiment of the present invention;

[0032] Figure 5 A flow chart of a protection method for implementing one-location tagging and two-location locking provided in the third embodiment of the present invention;

[0033] Figure 6 A flowchart of a protection method for implementing one-location tagging and two-location locking provided in a fourth embodiment of the present invention;

[0034] Figure 7 A structural block diagram of a protector for realizing one-place tagging and two-place locking in accordance with an embodiment of the present invention;

[0035] Figure 8 A structural block diagram of a power distribution device for implementing one-location signage and two-location lockout provided by an embodiment of the present invention;

[0036] Fig. 9 A block diagram of a power supply monitoring system for implementing one-location signage and two-location lockout provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application. In addition, for the sake of clarity, parts not related to the description of the exemplary embodiments are omitted in the drawings.

[0038] In this specification, it should be understood that terms such as "including" or "having" are intended to indicate the existence of features, numbers, steps, behaviors, components, parts or combinations thereof disclosed in this specification, and are not intended to exclude the possibility that one or more other features, numbers, steps, behaviors, components, parts or combinations thereof exist or are added. It should also be noted that the embodiments in this specification and the features in the embodiments may be combined with each other if there is no conflict.

[0039] It should be noted that the technical solution of the present invention can be applied to power supply monitoring systems in various industrial production fields. Without loss of generality, this specification will take a coal mine power supply monitoring system as an example to illustrate and give a specific implementation method.

[0040] Figure 1 A structural schematic diagram of a coal mine power supply system is given, and the technical solution of the present invention can be applied to such a coal mine power supply monitoring system.

[0041] like Figure 1 As shown, the coal mine power supply system is mostly composed of ground substations, underground substations, underground distribution points, etc. The underground distribution points include high-voltage distribution devices, low-voltage feeder switches, mobile substations, lighting comprehensive protection equipment and other equipment (hereinafter referred to as "distribution devices"). The coal mine power supply system has the characteristics of more power supply locations and more complex power supply lines.

[0042] Coal mines are mostly powered by cables. Once a power line fails or equipment fails, it needs to be repaired in time. Figure 1 The example shows that a fault occurs between the power distribution device 401 and the equipment 1 of the underground substation 4. It may be a fault of the cable or the equipment 1, which needs to be repaired. When the electrical maintenance personnel perform on-site maintenance, they need to inspect the equipment 1 and the cables there after the power distribution device 401 is powered off. In order to prevent other personnel from mistakenly sending power to the maintenance site, which may cause electric shock casualties or equipment damage, on-site maintenance personnel must follow the principles of "must hang a sign" and "whoever hangs the sign, whoever removes the sign". Before maintenance, a visible safety maintenance sign should be hung on the corresponding power distribution device as a warning, and the person who hung the sign should remove the sign after the maintenance is completed.

[0043] In recent years, as coal mines have continuously improved their safety requirements for power supply systems, ground monitoring systems have been equipped with electronic sign-on and electronic sign-off functions. However, the current power supply monitoring system still has the following two safety issues: First, after the electronic sign-off, there is a sign-off mark in the monitoring system, and control instructions cannot be issued to the device during maintenance, but manual operation on site can still supply power to the device, and once an error is made, a safety accident will still occur; second, the remote control of the monitoring system depends on the reliability and stability of the communication line. Once a communication link fails, the monitoring end cannot issue instructions to the corresponding device for electronic sign-off and sign-off, and the on-site maintenance personnel can only manually hang warning signs for maintenance. The monitoring system lacks the sign-off indication, and if the power is supplied by mistake after the communication is restored, it will also cause a safety accident.

[0044] To this end, the present invention proposes a solution of "hanging a sign at one place and locking at two places", wherein the "two places" refer to the ground power supply monitoring system and the protector in the local power distribution device. Through the technical solution of the present invention, a maintenance sign can be hung at any place. After hanging the sign, not only the remote control operation of power off and power supply of the maintenance equipment by the ground power supply monitoring system is locked, but also the remote control operation of power off and power supply of the protector in the local power distribution device is locked. After the maintenance is completed, according to the principle of "whoever hangs the sign, whoever removes the sign", the maintenance personnel shall confirm and remove the sign before closing the switch and supplying power, so as to ensure the safety of the maintenance link and prevent the above-mentioned safety problems from occurring.

[0045] The following is attached to the instruction manual Figures 2 to 8 The specific implementation method of the technical solution of the present invention is described.

[0046] Figure 2 The flowchart of the protection method for implementing one-location tagging and two-location locking provided by the first embodiment of the present invention is schematically shown.

[0047] like Figure 2 As shown, the protection method includes operations S210 to S240.

[0048] S210: receiving an electronic sign-hanging instruction, which is issued by a remote monitoring terminal or an on-site operation terminal.

[0049] S220: Storing the sign information corresponding to the electronic sign instruction.

[0050] S230: Lock the closing operation of the power distribution device according to the electronic sign instruction.

[0051] S240: After the power distribution device is powered on again, the sign-out information is read, and the closing operation of the power distribution device is locked again according to the sign-out information.

[0052] The power supply monitoring system of the embodiment of the present invention can be a power supply monitoring system of a coal mine, or a power supply monitoring system in an electric power or other industrial scenario. The power supply monitoring system remotely controls the power distribution device through a communication network (such as an industrial ring network, a 5G communication network, etc.).

[0053] The power distribution device is the power equipment in the power supply system, including high-voltage power distribution devices, low-voltage feeder switches, mobile substations, lighting comprehensive protection equipment, etc. A comprehensive protector (also referred to as "protector" in this specification) is provided in the power distribution device to realize the function of comprehensive protection, and the method of the present invention can be executed through the protector.

[0054] The remote monitoring terminal is the manual operation terminal of the power supply monitoring system. The monitoring system is usually set up in the monitoring center on the ground. It is usually designed as a graphical human-machine interface and issues commands through operation buttons. The on-site operation terminal refers to the operation terminal that issues commands at the on-site equipment. The operation terminal can be a physical switch button set on the distribution device, a remote control switch connected to the protector, or an operable display screen set on the protector.

[0055] In operation S210, the electronic signboard instruction can be issued by either the remote monitoring terminal or the on-site operation terminal, so as to adapt to the signboard requirements in different scenarios. For example, when the communication network fails, the remote monitoring terminal cannot issue the electronic signboard instruction. At this time, the electronic signboard can be performed on-site, which is also an improvement on the current power supply monitoring system that only supports remote electronic signboard.

[0056] In operation S220, the listing information corresponding to the electronic listing instruction is stored so that the information can be read after the maintenance is completed and the power is turned on again to prevent the information from being lost due to the maintenance power failure. Therefore, the operation can be specifically: the listing information corresponding to the electronic listing instruction is stored in a memory that is not lost when the power is off. Since the maintenance process requires power-off operation, in order to ensure the reliability of the stored information, a memory that is not lost when the power is off is used, such as Flash ROM (flash memory), EEPROM (electrically erasable programmable read-only memory), FRAM (ferroelectric memory) and phase change memory (PRAM), etc. The memory can be a hardware unit built into the protector.

[0057] In operation S230, locking the closing operation of the power distribution device according to the electronic signboard instruction may specifically be: disconnecting the hard contact in the closing circuit according to the electronic signboard instruction to lock the closing operation of the power distribution device. The protector is connected to the closing circuit of the power distribution device, and the opening and closing of the closing circuit is controlled by the opening and closing of the hard contact therein. In some embodiments, the hard contact is a normally closed contact of a closing relay in the closing circuit.

[0058] Figure 3The schematic diagram of an electronic sign-board locking closing circuit is shown, and the electronic sign-board locking closing circuit can be applied to various embodiments in this specification.

[0059] like Figure 3 As shown, the closing circuit connects the closing power supply and the closing motor through an electronic sign-locking closing relay, and there are also manual closing buttons and remote control closing buttons in the circuit. The electronic sign-locking closing contact of the relay is a normally closed contact. When the circuit is normal, the contact is in a closed state. When the protector receives the electronic sign-locking command, the contact is in an open state, and the on-off of the closing circuit is controlled by hardware contacts. At this time, whether the closing command is issued by the ground power supply monitoring system or the protector in the local power distribution device is through the infrared remote control or the closing button on the switch door, the closing operation cannot be performed, and the hardware lock is realized.

[0060] The power distribution device is powered off during maintenance and is powered on again after the maintenance is completed. Therefore, the state of the power distribution device undergoes the process of "power on-power off-power on again". The "power on again" in this manual refers to powering on again after power off. For example, when the coal mine power supply system is being maintained, the circuit breaker trolley in the power distribution device is often pulled out. For more reliable and safe maintenance, the entire power distribution device and protector are not powered after the circuit breaker trolley is pulled out. After the maintenance is completed, the power distribution device is pushed in. At this time, the power distribution device is powered on again, and the protector is also powered on again. According to the circuit principle of the closing circuit, after power is on Figure 3 The electronic sign-out locking closing contact in the circuit becomes normally closed again. At this time, the closing circuit is conductive, and if there is an error in operation, the motor M can be closed. Therefore, in operation S240, after the power distribution device is powered on again after the maintenance is completed, the protector reads the stored sign-out information and disconnects the hard contacts in the closing circuit again according to the sign-out information, so as to achieve the purpose of locking the closing operation of the power distribution device, thereby preventing safety accidents caused by the wrong operation of power transmission.

[0061] Figure 4 The flowchart of the protection method for implementing one-location tagging and two-location locking provided by the second embodiment of the present invention is schematically shown.

[0062] like Figure 4 As shown, the protection method further includes operation S250 based on the aforementioned operations S210 to S240.

[0063] S250: If the electronic sign-off instruction is issued by the on-site operation terminal, the sign-off information is reported to the remote monitoring terminal.

[0064] In the method of the embodiment of the present invention, the purpose of "hanging a sign at any location, locking both locations" can be achieved. Therefore, if the remote monitoring end cannot issue an electronic sign-hanging instruction to the power distribution device due to some reasons, such as a communication network failure, the electronic sign-hanging can be performed on-site. After the communication is restored, the protector reports the sign-hanging information to the remote monitoring end, thereby ensuring that the electronic sign-hanging sign in the monitoring system is synchronized with the site, preventing erroneous operation due to the lack of electronic sign-hanging sign in the monitoring system, and overcoming the shortcomings of the existing monitoring system.

[0065] Figure 5 The flowchart of the protection method for implementing one-location tagging and two-location locking provided by the third embodiment of the present invention is schematically shown.

[0066] like Figure 5 As shown, the protection method can further include S260 and S270 based on any of the above embodiments.

[0067] S260: Receive an electronic delisting instruction.

[0068] S270: Unlock the closing operation of the distribution device when the electronic de-boarding instruction meets the requirements.

[0069] In order to follow the safety principle of "whoever hangs up the sign, whoever removes the sign", after the maintenance is completed, the maintenance personnel must confirm before issuing the electronic delisting instruction. In principle, the electronic delisting instruction is issued by the end that issued the electronic hanging instruction, that is, the issuer of the electronic delisting instruction and the electronic hanging instruction should be the same. In special cases, if the electronic hanging instruction is issued by the remote monitoring end, but the electronic delisting instruction cannot be issued by the remote monitoring end due to a communication failure during delisting, the electronic delisting can be performed by the on-site operation end in conjunction with the password verification method. The issuance of the electronic delisting can be verified by software on the operation end, for example, the non-hanging initiating end can initiate the electronic delisting only after entering the correct password; it can also be verified on the protector end, for example, the legality of the electronic delisting instruction is determined by verifying the information content.

[0070] Figure 6 The flowchart of the protection method for implementing one-location tagging and two-location locking provided by the fourth embodiment of the present invention is schematically shown.

[0071] like Figure 6 As shown, the protection method can further include S280 and S290 based on any of the above embodiments.

[0072] S280: storing the delisting information corresponding to the electronic delisting instruction.

[0073] S290: If the electronic delisting instruction is issued by the on-site operation terminal, the delisting information is reported to the remote monitoring terminal.

[0074] Through the above operation, when the protector receives the electronic delisting instruction, the corresponding delisting information will be stored in a memory that will not be lost when the power is off, so as to prevent the loss of the delisting information due to power failure for other reasons during the maintenance process (if this happens, the listing information will still be read after powering on again, which will disconnect the closing circuit and make it impossible to supply power, affecting the power supply recovery). On the other hand, if the communication failure causes the remote monitoring end to be unable to send the electronic delisting instruction, and it is sent by the on-site operation end, the protector also needs to store the delisting information to report it to the monitoring system after the communication is restored, so that the hanging and unhanging status of the electronic maintenance signs at the two locations can be kept synchronized.

[0075] In an embodiment of the present invention, the sign-on information includes a sign-on maintenance remote signal flag, and the corresponding delisting information includes a delisting maintenance remote signal flag. In some implementations, the sign-on flag and the delisting flag in the remote signal are the same bit, for example, the sign-on bit is set to 1 and the delisting bit is reset to 0. The sign-on information may also include a sign-on maintenance event record.

[0076] By applying the method of the embodiment of the present invention, the following technical effects can be achieved:

[0077] (1) By storing the listing information and synchronizing it with the monitoring end, the problem that the current power supply monitoring system cannot synchronize with the on-site maintenance status when a communication link failure occurs is solved, thereby improving the reliability of the system;

[0078] (2) By responding to the electronic listing and delisting instructions issued by either the remote monitoring terminal or the on-site operation terminal, electronic listing and delisting can be achieved through the remote monitoring terminal or the on-site operation terminal, thereby improving the flexibility of the system;

[0079] (3) By means of hardware interlocking the closing circuit, the erroneous operation of power supply is prevented, and the closing operation of the switches in both locations is completely locked after electronic posting at either location, thereby improving the safety of the system.

[0080] The following examples illustrate three operation modes of a coal mine power supply monitoring system using the technical solution of the present invention.

[0081] (1) Use the ground power supply monitoring system to hang an electronic sign to achieve interlocking between two locations.

[0082] Reference Figure 1 The coal mine power supply system and the fault point of the example shown, before the maintenance, the ground power supply monitoring system is used to control the high-voltage distribution device 401 to open the switch, so that it stops supplying power to the power supply line and equipment 1 below. At the same time, in the ground power supply monitoring system, an electronic sign is set for the high-voltage distribution device 401 in the underground substation 4. After the electronic sign is set, the ground power supply monitoring system cannot send a closing command to the high-voltage distribution device 401 through the monitoring software.

[0083] After receiving the electronic maintenance sign command, the integrated protection device in the power distribution device 401 sets the maintenance sign event record and maintenance sign remote signal flag, and stores this information in the memory that will not be lost in case of power failure. Figure 3 The normally closed contact of the electronic sign-out interlock closing relay in the circuit breaker is open. Under normal circumstances, the electronic sign-out interlock closing contact is in a closed state. When the integrated protector receives the command of the electronic sign-out interlock, the electronic sign-out interlock closing contact is in an open state, and its contact is blocked. The closing circuit is disconnected by hard contact. At this time, the closing command issued by the ground power supply monitoring system or the closing button on the infrared remote control of the integrated protector or the switch door cannot connect the closing circuit. The motor M is not energized and the closing operation cannot be performed, achieving the purpose of "one place sign-out, two places interlocking".

[0084] When the coal mine power supply system is being overhauled, the circuit breaker trolley in the power distribution device is often pulled out. To ensure a safer overhaul process, the entire power distribution device and the integrated protector are not energized after the circuit breaker trolley is pulled out. After the overhaul is completed, the power distribution device is pushed in, and the integrated protector is powered on again. At this time, the protector automatically reads the electronic sign from the memory, and opens the hard contact in the closing circuit according to the electronic sign. At this time, the closing circuit is not conductive, and power cannot be delivered even if there is a power-on command due to erroneous operation. Only after the maintenance personnel confirm and remove the sign, is closing and power delivery allowed, thus ensuring safe and reliable power supply.

[0085] After the maintenance is completed, the electronic sign-off mark is set for the high-voltage distribution device 401 in the ground power supply monitoring system. After receiving the electronic sign-off command, the integrated protector in the distribution device 401 restores the remote signal mark of the electronic sign-off and stores the information in the memory that will not be lost when the power is off. At the same time, the control Figure 3 The normally closed contact of the relay in is closed, the closing circuit is turned on, the motor M is energized, and the power distribution device 401 can be closed. After closing, it continues to supply power to the power supply line and equipment 1 below.

[0086] (ii) Use the integrated protector in the power distribution device to hang an electronic sign to achieve interlocking between two locations.

[0087] Still Figure 1 Taking the fault point shown as an example, before maintenance, the high-voltage distribution device 401 is opened on site to stop supplying power to the power supply line and equipment 1 below. At the same time, an electronic sign is set on the integrated protector in the high-voltage distribution device 401 in the underground substation 4. The electronic sign-hanging command can be sent through an infrared remote control or button or an operable display screen on the protector. After the integrated protector in the distribution device 401 receives the electronic sign-hanging command, a sign-hanging maintenance sign is displayed on the protector's display screen, and the set sign-hanging maintenance event record and remote signal sign are stored in the memory that will not be lost in the event of a power failure. At the same time, the protector controls Figure 3The hard contact in the switch is opened, thereby locking the closing operation. At this time, the closing command cannot be issued to the integrated protector in the power distribution device 401 on site.

[0088] After the maintenance is completed, the integrated protector in the high-voltage power distribution device 401 is electronically de-boarded through the infrared remote controller or button. After receiving the electronic de-boarding command, the integrated protector in the power distribution device 401 restores the remote signal sign of the electronic board and stores the information in the memory that will not be lost when the power is off. At the same time, the control Figure 3 The hard contact in is closed, the closing circuit is turned on, the motor M is energized, and the power distribution device 401 can be closed. After closing, it continues to supply power to the power supply line and equipment 1 below.

[0089] (3) The two listings serve as backup for each other.

[0090] "Two places" refer to the ground power supply monitoring system and the integrated protector in the local power distribution device. After applying the technical solution of the present invention, both places can be electronically listed. When a communication failure occurs in the ground monitoring system, the electronic listing can be performed on-site through the protection device in the power distribution device, and the listing maintenance event record and remote signaling mark are set. When the communication of the ground monitoring system is restored, the protector uploads the listing information to the monitoring system. After receiving the listing information, the monitoring system sets the electronic listing mark on the corresponding power distribution device, thereby avoiding the control signal of the equipment being sent during the maintenance period, which may cause safety accidents after power transmission. Only after the maintenance personnel confirm the removal of the sign can the switch be closed and power can be transmitted.

[0091] Based on the same inventive concept, the embodiment of the present invention also provides a protector 400 that realizes one-place tagging and two-place locking. Figure 7 The protector 400 will be described.

[0092] Figure 7 The block diagram of the protector 400 for realizing one-place tagging and two-place locking according to the embodiment of the present invention is schematically shown. The protector 400 is realized by combining software and hardware.

[0093] like Figure 7 As shown, the protector 400 includes a receiving unit 410, a storage unit 420, a locking unit 430, and a control unit 440. The protector 400 can execute the various methods described above. Among them:

[0094] The receiving unit 410 is used to receive an electronic sign-on instruction, which is sent by a remote monitoring terminal or an on-site operation terminal;

[0095] The storage unit 420 is used to store the listing information corresponding to the electronic listing instruction;

[0096] A locking unit 430, used to lock the closing operation of the power distribution device according to the electronic tag instruction;

[0097] The control unit 440 is used to read the sign-out information after the power distribution device is powered on again, and to lock the closing operation of the power distribution device again according to the sign-out information.

[0098] The receiving unit 410 may also be used to receive an electronic delisting instruction, and the storage unit 420 may also be used to store delisting information corresponding to the electronic delisting instruction.

[0099] The protector of the embodiment of the present invention responds to the electronic listing and delisting instructions issued by either the remote monitoring end or the on-site operation end, thereby realizing electronic listing and electronic delisting through the remote monitoring end or the on-site operation end, thereby improving the flexibility of the system; through the hardware locking closing circuit method, it prevents power supply by erroneous operation, and realizes complete locking of the switch closing operation at both locations after electronic listing is performed at any location, thereby improving the safety of the system.

[0100] Furthermore, the protector 400 provided in the embodiment of the present invention may also include:

[0101] The sending unit 450 is used to report the sign-posting information to the remote monitoring terminal when the electronic sign-posting instruction is issued by the on-site operation terminal.

[0102] The sending unit 450 is also used to report the delisting information to the remote monitoring terminal when the electronic delisting instruction is issued by the on-site operation terminal.

[0103] The protector of the embodiment of the present invention solves the problem that the current power supply monitoring system cannot be synchronized with the on-site maintenance status when a communication link failure occurs by storing the listing information and sending it to the monitoring end to keep it synchronized, thereby improving the reliability of the system.

[0104] Furthermore, the protector 400 provided in the embodiment of the present invention may also include:

[0105] The display unit 460 is used to display the warning information of the electronic sign to the on-site personnel.

[0106] The display unit 460 may be an electronic display screen, which prompts on-site personnel the status of the power distribution device by displaying visual elements such as text and icons to avoid erroneous operations by other personnel.

[0107] The display unit 460 may also be an operable electronic display screen that can be clicked by an operator to provide on-site electronic signage and warning information display.

[0108] Based on the same inventive concept, an embodiment of the present invention further provides a power distribution device 500 .

[0109] Figure 8A block diagram of a power distribution device 500 provided in an embodiment of the present invention is schematically shown.

[0110] like Figure 8 As shown, the power distribution device 500 is provided with the protector 400 in the aforementioned embodiment.

[0111] The power supply monitoring system formed by the power distribution device 500 can achieve safer and more reliable power supply protection performance.

[0112] Based on the same inventive concept, the embodiment of the present invention further provides a power supply monitoring system 600. Fig. 9 The monitoring system 600 will be described.

[0113] Fig. 9 The block diagram of the power supply monitoring system 600 according to the embodiment of the present invention is schematically shown. The power supply monitoring system 600 can be implemented as part or all of the electronic device through software, hardware or a combination of both.

[0114] like Fig. 9 As shown, the power supply monitoring system 600 includes a remote monitoring terminal 610, an on-site operation terminal 620, and a protector 630 disposed in a power distribution device.

[0115] The protector 630 is used to execute the protection method of any of the embodiments described above in response to instructions issued by the remote monitoring terminal 610 and the on-site operation terminal 620 .

[0116] According to the power supply monitoring system of the embodiment of the present invention, the protector responds to the instructions of the remote monitoring terminal and the on-site operation terminal, provides stable and safe protection during electronic listing and electronic delisting, and improves the safety performance of the power supply monitoring system.

[0117] The above describes specific embodiments of the present invention. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0118] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, electronic device, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0119] The apparatus, electronic device, non-volatile computer storage medium and method provided in the embodiments of this specification correspond to each other, and therefore, the apparatus, electronic device and non-volatile computer storage medium also have similar beneficial technical effects as the corresponding method. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the corresponding apparatus, electronic device and non-volatile computer storage medium will not be repeated here.

[0120] In the 1990s, improvements to a technology could be clearly distinguished as hardware improvements (for example, improvements to the circuit structure of diodes, transistors, switches, etc.) or software improvements (improvements to the method flow). However, with the development of technology, many improvements to the method flow today can be regarded as direct improvements to the hardware circuit structure. Designers almost always obtain the corresponding hardware circuit structure by programming the improved method flow into the hardware circuit. Therefore, it cannot be said that an improvement in a method flow cannot be implemented using a hardware entity module. For example, a programmable logic device (PLD) (such as a field programmable gate array (FPGA)) is such an integrated circuit whose logical function is determined by the user's programming of the device. Designers can "integrate" a digital system on a PLD by programming it themselves, without having to ask a chip manufacturer to design and produce a dedicated integrated circuit chip. Moreover, nowadays, instead of manually making integrated circuit chips, this kind of programming is mostly implemented by "logic compiler" software, which is similar to the software compiler used when developing and writing programs, and the original code before compilation must also be written in a specific programming language, which is called hardware description language (HDL). There is not only one HDL, but many kinds, such as ABEL (Advanced Boolean Expression Language), AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, RHDL (Ruby Hardware Description Language), etc. The most commonly used ones are VHDL (Very-High-Speed ​​Integrated Circuit Hardware Description Language) and Verilog. Those skilled in the art should also know that it is only necessary to program the method flow slightly in the above-mentioned hardware description languages ​​and program it into the integrated circuit, and then it is easy to obtain the hardware circuit that implements the logic method flow.

[0121] The controller can be implemented in any appropriate manner, for example, the controller can take the form of a microprocessor or processor and a computer-readable medium storing a computer-readable program code (such as software or firmware) that can be executed by the (micro)processor, a logic gate, a switch, an application-specific integrated circuit (ASIC), a programmable logic controller, and an embedded microcontroller. Examples of controllers include, but are not limited to, the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicone Labs C8051F320. The memory controller can also be implemented as part of the control logic of the memory. Those skilled in the art also know that in addition to implementing the controller in a purely computer-readable program code manner, the controller can be implemented in the form of a logic gate, a switch, an application-specific integrated circuit, a programmable logic controller, and an embedded microcontroller by logically programming the method steps. Therefore, this controller can be considered as a hardware component, and the devices included therein for implementing various functions can also be regarded as structures within the hardware component. Or even, the devices for implementing various functions can be regarded as both software modules for implementing the method and structures within the hardware component.

[0122] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0123] For the convenience of description, the above devices are described in terms of functions and are divided into various units. Of course, when implementing one or more embodiments of this specification, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0124] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems, or computer program products. Therefore, the embodiments of this specification may be in the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the embodiments of this specification may be in the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0125] This specification is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of this specification. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data optimization device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data optimization device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0126] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data optimization device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0127] These computer program instructions may also be loaded onto a computer or other programmable data optimization device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0128] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0129] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0130] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0131] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0132] The specification may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media including storage devices.

[0133] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0134] The above is only an embodiment of this specification and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A protection method for achieving one-place signage and two-place lockout, characterized in that: The method comprises: Receiving an electronic sign-on instruction, the electronic sign-on instruction being issued by a remote monitoring terminal or an on-site operation terminal; Storing the listing information corresponding to the electronic listing instruction, including: storing the listing information corresponding to the electronic listing instruction in a memory that is not lost when power is off; According to the electronic signboard instruction, locking the closing operation of the power distribution device includes: disconnecting the hard contact in the closing circuit according to the electronic signboard instruction to lock the closing operation of the power distribution device, wherein the hard contact is a normally closed contact, and during maintenance, the power distribution device is not energized, and after the maintenance is completed, the power distribution device is powered on again, so that the hard contact becomes normally closed again; After the power distribution device is powered on again, the tag information is read, and the closing operation of the power distribution device is locked again according to the tag information, including: disconnecting the hard contact again according to the tag information to lock the closing operation of the power distribution device; If the electronic sign-off instruction is issued by the on-site operation terminal, the sign-off information is reported to the remote monitoring terminal.

2. The method according to claim 1, characterized in that The method further comprises: Receive electronic delisting instructions; When the electronic delisting instruction meets the requirements, the closing operation of the power distribution device is unlocked.

3. The method according to claim 2, characterized in that The method further comprises: Storing delisting information corresponding to the electronic delisting instruction; If the electronic delisting instruction is issued by the on-site operation terminal, the delisting information is reported to the remote monitoring terminal.

4. A protector for realizing one-place tagging and two-place locking, the protector executing the protection method according to any one of claims 1 to 3, characterized in that: The protector comprises: A receiving unit, used to receive an electronic sign-hanging instruction, wherein the electronic sign-hanging instruction is issued by a remote monitoring terminal or an on-site operation terminal; A storage unit, used to store the listing information corresponding to the electronic listing instruction, wherein the storage unit is a memory that does not lose the information when power is off; A locking unit, used for locking the closing operation of the power distribution device according to the electronic sign instruction; A control unit, used for reading the sign information after the power distribution device is powered on again, and blocking the closing operation of the power distribution device again according to the sign information; The sending unit is used to report the listing information to the remote monitoring terminal when the electronic listing instruction is issued by the on-site operation terminal.

5. A power distribution device that realizes one-location tagging and two-location locking, characterized in that: The power distribution device is provided with a protector as claimed in claim 4.

6. A power supply monitoring system that realizes one-site signage and two-site lockout, characterized in that: include: Remote monitoring terminal, on-site operation terminal, and protector installed in the power distribution device; The protector is used to execute the protection method as described in any one of claims 1 to 3 in response to instructions issued by the remote monitoring terminal and the on-site operation terminal.

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