CN114709741B

CN114709741B - Interlocking protection method, device and system for switch cabinet

Info

Publication number: CN114709741B
Application number: CN202210387664.2A
Authority: CN
Inventors: 高超; 傅华; 李鹏涛; 张方科; 潘晓晶; 谷强; 汪翊飞; 王雷; 周煜; 吕博闻
Original assignee: Sinoma Overseas Technology Development Co ltd
Current assignee: Sinoma Overseas Technology Development Co ltd
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2023-03-21
Anticipated expiration: 2042-04-13
Also published as: CN114709741A

Abstract

The invention discloses an interlocking protection method, a device and a system of a switch cabinet, which comprise the following steps: when the switch cabinet is overhauled, the master control system carries out identity verification on an overhaul worker and distributes a first verification code to the switch cabinet, the overhaul worker inputs identity information and a second verification code in the sub-control system, the master control system verifies the identity of the overhaul worker and the second verification code again, and the sub-control system locks a breaker trolley of the switch cabinet after the verification is correct; after the switch cabinet is overhauled, the maintainer inputs identity information and a third verification code in the sub-control system, the main control system verifies the identity of the maintainer and the third verification code again, after no error is verified, the sub-control system unlocks the breaker trolley of the switch cabinet, and therefore the circuit breaker trolley is ensured to be locked at a disconnection position, the motor of the equipment is enabled not to be started due to any misoperation, personal safety of the maintainer is effectively guaranteed, and safety of an overhauling task is improved.

Description

Interlocking protection method, device and system for switch cabinet

Technical Field

The invention relates to the technical field of switch cabinets, in particular to an interlocking protection method, device and system of a switch cabinet.

Background

In an electric power system, a switch cabinet is very important equipment for ensuring the normal operation of the electric power system, and the switch cabinet is electric equipment and mainly used for opening, closing, controlling and protecting the electric equipment in the process of generating, transmitting, distributing and converting electric energy of the electric power system. When the switch cabinet is overhauled, the general flow is that an overhaul person notifies a central control room attendant, the electric attendant is notified to break a main circuit breaker of an equipment motor to be overhauled, the breaker trolley is placed at a breaking position and is hung and locked, after the overhaul is finished, the electric attendant is notified to unlock to place the breaker trolley at a closing position, and finally the central control room attendant is notified that the equipment can normally operate after the overhaul is finished; the whole process node involves many personnel, each personnel participating in the process needs to perform its own job, and there is no place to be carefree, but accidental internal personnel errors or external personnel interference of the process cannot be avoided; besides, all the switch cabinets are provided with padlocks which use standard keys unified by manufacturers, all the switch cabinet breaker trolley position mechanisms are provided with special rocking handles unified by the manufacturers, and each switch cabinet cannot be provided with an independent and exclusive key and rocking handle; combining the two factors can bring great hidden danger to the equipment maintainer.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that potential safety hazards still exist when a maintainer overhauls a switch cabinet in the prior art, and provide an interlocking protection method, device and system of the switch cabinet.

In order to achieve the purpose, the invention provides the following technical scheme:

in a first aspect, an embodiment of the present invention provides an interlock protection method for a switch cabinet, which is applied to a master control system, and the method includes: acquiring identity information of a maintainer and verifying the identity information, acquiring a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified, and distributing a first verification code for the to-be-overhauled switch cabinet; acquiring a second verification code sent by the sub-control system; matching the first verification code with the second verification code, and when the matching is successful, sending a first matching success signal to the sub-control system, wherein the first matching success signal is used for controlling the sub-control system to acquire a locking trigger signal input by a maintainer, and the locking trigger signal is used for controlling the sub-control system to acquire identity information of the maintainer; the method comprises the steps of obtaining identity information of a maintenance worker sent by a sub-control system and verifying the identity information, sending a first verification success signal to the sub-control system after the identity information is verified successfully, wherein the first verification success signal is used for controlling the sub-control system to send a locking signal, and the locking signal is used for controlling a driving interlocking device to lock the position of a breaker trolley of a switch cabinet to be maintained.

In an embodiment, the interlock protection method of the switch cabinet is characterized by further comprising the following steps: the method comprises the steps that a third verification code sent by a sub-control system is obtained, the first verification code is matched with the third verification code, when matching is successful, a second matching success signal is sent to the sub-control system, the second matching success signal is used for controlling the sub-control system to obtain an unlocking trigger signal input by a maintainer, and the unlocking trigger signal is used for controlling the sub-control system to obtain identity information of the maintainer; and acquiring identity information of the maintainers, which is sent by the sub-control system, verifying the identity information, sending a second verification success signal to the sub-control system after the identity information is successfully verified, wherein the second verification success signal is used for controlling the sub-control system to send an unlocking signal.

In an embodiment, the interlock protection method of the switch cabinet further comprises: acquiring identity information of a maintainer and verifying the identity information, and acquiring a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified; and canceling and clearing the first verification code based on the switch cabinet code to be overhauled.

In an embodiment, the interlock protection method of the switch cabinet further comprises: and when the first verification code and the second verification code are successfully matched, sending a motor disconnection interlocking locking signal to the distributed control system, wherein the motor disconnection interlocking locking signal is used for controlling the distributed control system to close an interlocking mechanism of the motor and the switch cabinet.

In an embodiment, the interlock protection method of the switch cabinet further comprises: when the first verification code is cancelled, a motor communication interlocking locking signal is sent to the distributed control system at the same time, and the motor communication interlocking locking signal is used for controlling the distributed control system to start an interlocking mechanism of the motor and the switch cabinet.

In a second aspect, an embodiment of the present invention provides an interlocking protection method for a switch cabinet, which is applied to a sub-control system, and the method includes: acquiring a second verification code corresponding to the switch cabinet to be overhauled and input by an overhaul worker, and sending the second verification code to the main control system; acquiring a locking trigger signal input by a maintainer based on a first matching success signal sent by a master control system, wherein the master control system matches a first verification code with a second verification code, and when the matching is successful, the master control system sends a first matching success signal; acquiring identity information of a maintainer based on a locking trigger signal, and sending the identity information to a master control system; and sending a locking signal to the driving interlocking device based on the acquired first verification success signal sent by the master control system, wherein the master control system verifies the identity information of the maintainers, and after the identity information is verified successfully, the master control system sends the first verification success signal which is used for controlling the driving interlocking device to lock the position of the circuit breaker trolley of the switch cabinet to be overhauled.

In an embodiment, the interlock protection method of the switch cabinet further comprises: acquiring a third verification code input by a maintainer, and sending the third verification code to the main control system; acquiring an unlocking trigger signal input by a maintainer based on a second matching success signal sent by the master control system, wherein the first verification code and the third verification code are matched by the master control system, and when the matching is successful, the master control system sends a second matching success signal; acquiring identity information of a maintainer based on an unlocking trigger signal, and sending the identity information to a master control system; and sending an unlocking signal to the driving interlocking device based on the obtained second verification success signal sent by the master control system, wherein the master control system verifies the identity information of the maintainers, and after the identity information is verified successfully, the master control system sends the second verification success signal which is used for controlling the driving interlocking device to unlock the position of the circuit breaker trolley of the switch cabinet to be overhauled.

In a third aspect, an embodiment of the present invention provides an interlock protection device for a switch cabinet, including: the verification code distribution module is used for acquiring and verifying identity information of a maintainer, acquiring a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified, and distributing a first verification code for the to-be-overhauled switch cabinet; the first acquisition module is used for acquiring a second verification code sent by the sub-control system; the first matching module is used for matching the first verification code with the second verification code, and when the matching is successful, sending a first matching success signal to the sub-control system, wherein the first matching success signal is used for controlling the sub-control system to acquire a locking trigger signal input by a maintainer, and the locking trigger signal is used for controlling the sub-control system to acquire identity information of the maintainer; the first verification module is used for acquiring identity information of the maintainers sent by the sub-control system and verifying the identity information, and after the identity information is verified successfully, a first verification success signal is sent to the sub-control system and used for controlling the sub-control system to send a locking signal, and the locking signal is used for controlling the driving interlocking device to lock the position of a breaker trolley of the switch cabinet to be maintained.

In one embodiment, the interlock protection device of the switch cabinet further comprises: the second matching module is used for acquiring a third verification code sent by the sub-control system, matching the first verification code with the third verification code, and sending a second matching success signal to the sub-control system when the matching is successful, wherein the second matching success signal is used for controlling the sub-control system to acquire an unlocking trigger signal input by a maintainer, and the unlocking trigger signal is used for controlling the sub-control system to acquire identity information of the maintainer; and the second verification module is used for acquiring the identity information of the maintainers sent by the sub-control system and verifying the identity information, and sending a second verification success signal to the sub-control system after the identity information is successfully verified, wherein the second verification success signal is used for controlling the sub-control system to send an unlocking signal.

In a fourth aspect, an embodiment of the present invention provides an interlock protection device for a switch cabinet, including: the second acquisition module is used for acquiring a second verification code corresponding to the to-be-overhauled switch cabinet input by an overhaul worker and sending the second verification code to the main control system; the third acquisition module is used for acquiring a locking trigger signal input by a maintainer based on a first matching success signal sent by the master control system, wherein the master control system matches the first verification code with the second verification code, and when the matching is successful, the master control system sends the first matching success signal; the fourth acquisition module is used for acquiring the identity information of the maintainers based on the locking trigger signal and sending the identity information to the main control system; the locking module is used for sending a locking signal to the driving interlocking device based on the acquired first verification success signal sent by the master control system, wherein the master control system verifies the identity information of the maintainers, and after the identity information is verified successfully, the master control system sends the first verification success signal which is used for controlling the driving interlocking device to lock the position of the breaker trolley of the switch cabinet to be overhauled.

In one embodiment, the interlock protection device of the switch cabinet further comprises: the fifth acquisition module is used for acquiring a third verification code input by a maintainer and sending the third verification code to the main control system; the sixth acquisition module is used for acquiring an unlocking trigger signal input by a maintainer based on a second matching success signal sent by the master control system, wherein the master control system matches the first verification code with the third verification code, and when the matching is successful, the master control system sends the second matching success signal; the seventh acquisition module is used for acquiring the identity information of the maintainers based on the unlocking trigger signal and sending the identity information to the main control system; and the unlocking module is used for sending an unlocking signal to the driving interlocking device based on the obtained second verification success signal sent by the master control system, wherein the master control system verifies the identity information of the maintainers, and after the identity information is verified successfully, the master control system sends the second verification success signal which is used for controlling the driving interlocking device to unlock the position of the breaker trolley of the switch cabinet to be overhauled.

In a fifth aspect, an embodiment of the present invention provides an interlock protection system for a switch cabinet, including: the system comprises a main control system and a sub-control system, wherein the main control system acquires and verifies identity information of a maintainer, acquires a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified, and distributes a first verification code to the to-be-overhauled switch cabinet; the sub-control system acquires a second verification code input by a maintainer based on the first verification code and sends the second verification code to the main control system, the main control system matches the first verification code with the second verification code, and when the matching is successful, a first matching success signal is sent to the sub-control system; the sub-control system acquires a locking trigger signal input by a maintainer based on a first matching success signal sent by the main control system; the sub-control system acquires identity information of a maintainer based on the locking trigger signal and sends the identity information to the main control system; the master control system acquires identity information of a maintainer, which is sent by the sub-control system, verifies the identity information, and sends a first verification success signal to the sub-control system after the identity information is verified successfully; the sub-control system sends a locking signal to the driving interlocking device based on the acquired first verification success signal and the locking trigger signal sent by the main control system, and the locking signal is used for controlling the driving interlocking device to lock the position of the breaker trolley of the switch cabinet to be overhauled.

In one embodiment, the sub-control system further acquires a third verification code input by a maintainer based on the first verification code and sends the third verification code to the main control system; the master control system matches the first verification code with the third verification code, and when the first verification code is successfully matched with the third verification code, a second matching success signal is sent to the sub-control system; the sub-control system acquires an unlocking trigger signal input by a maintainer based on a second matching success signal sent by the main control system; the sub-control system acquires identity information of a maintainer based on the unlocking trigger signal and sends the identity information to the main control system; the master control system acquires identity information of the maintainers sent by the sub-control system and verifies the identity information, and after the identity information is verified successfully, a second verification success signal is sent to the sub-control system; and the sub-control system sends an unlocking signal to the driving interlocking device based on the obtained second verification success signal and the unlocking trigger signal, and the unlocking signal is used for controlling the driving interlocking device to unlock the position of the circuit breaker trolley of the switch cabinet to be overhauled.

The technical scheme of the invention has the following advantages:

1. according to the interlocking protection method, the interlocking protection device and the interlocking protection system for the switch cabinet, when the switch cabinet is maintained, the master control system performs identity verification on a maintainer and distributes a unique first verification code in the maintenance to the switch cabinet; in the locking process, the main control system receives and verifies a second verification code sent by the sub-control system, the second verification code is input by a maintainer based on the first verification code, when the second verification code is completely the same as the first verification code, the main control system judges that the maintainer arrives at the correct position of the switch cabinet to be overhauled, and sends a first matching success signal for controlling the sub-control system to acquire a locking trigger signal input by the maintainer, so that the situations of long overhauling time and poor overhauling efficiency caused by the fact that the maintainer arrives at the wrong position of the switch cabinet are prevented; and then, the master control system receives identity information of the maintenance personnel sent by the sub-control system and verifies the identity information, and after verification is not wrong, a first verification success signal is sent to the sub-control system and used for controlling the sub-control system to send a locking signal which is used for controlling the driving interlocking device to lock the position of a breaker trolley of the switch cabinet to be maintained, so that the conditions that the switch cabinet is damaged due to operation of non-maintenance personnel are prevented.

2. According to the interlocking protection method, device and system for the switch cabinet, in the locking process, the sub-control system acquires the second verification code input by an overhaul worker based on the first verification code and sends the second verification code to the main control system to ensure that the switch cabinet controlled by the sub-control system is the switch cabinet in the overhaul process, after the main control system successfully verifies, the sub-control system acquires the identity information of the overhaul worker based on the first matching success signal sent by the main control system and sends the identity information to the main control system to ensure that the overhaul worker is a worker executing an overhaul task, after the main control system successfully verifies, the sub-control system acquires the locking trigger signal input by the overhaul worker based on the first verification success signal sent by the main control system, and the sub-control system locks the breaker trolley of the switch cabinet based on the locking trigger signal to ensure that the circuit breaker trolley of the overhaul switch cabinet is locked at the disconnection position, so that an equipment motor cannot be started due to misoperation at this time, the personal safety of the overhaul worker is effectively ensured, and the safety of the overhaul task is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a block diagram of a specific example of an interlock protection system of a switch cabinet according to an embodiment of the present invention;

fig. 2 is a composition diagram of a specific example of the sub-control system according to the embodiment of the present invention;

fig. 3 is a flowchart of unlocking according to an embodiment of the present invention;

fig. 4 is a flowchart of a specific example of an interlock protection method for a switch cabinet according to an embodiment of the present invention;

fig. 5 is a flowchart of another specific example of an interlock protection method for a switch cabinet according to an embodiment of the present invention;

fig. 6 is a flowchart of another specific example of an interlock protection method for a switch cabinet according to an embodiment of the present invention;

fig. 7 is a flowchart of another specific example of an interlock protection method for a switch cabinet according to an embodiment of the present invention;

fig. 8 is a composition diagram of a specific example of the interlock protection device of the switch cabinet according to the embodiment of the present invention;

fig. 9 is a composition diagram of another specific example of the interlock protection device of the switch cabinet according to the embodiment of the present invention;

fig. 10 is a composition diagram of a specific example of the interlock protection device of the switch cabinet according to the embodiment of the present invention;

fig. 11 is a composition diagram of another specific example of the interlock protection device of the switch cabinet according to the embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

An embodiment of the present invention provides an interlock protection system for a switch cabinet, as shown in fig. 1, including: a master control system and a branch control system.

Specifically, as shown in fig. 1, the main control system includes a display module (which may be an HMI touch screen module, etc.), an identity information acquisition module (which may be a fingerprint information acquisition module, a facial recognition module, an iris collector, etc.), a database, a communication module (which may be an Internet ethernet module), a power supply module (which may be an uninterruptible power supply module), and at least one industrial communication module.

Specifically, as shown in fig. 1, in an industrial project, each switch cabinet is configured with a sub-control system, and each sub-control system performs data information transmission with a main control system through an industrial communication module, as shown in fig. 2, the sub-control system includes a display module (which may be an HMI touch screen module, etc.), an identity information acquisition module (which may be a fingerprint information acquisition module, a face recognition module, an iris collector, etc.), a driving interlock device, and an industrial communication module.

Specifically, the interlock protection system of the switch cabinet of the embodiment of the present invention can complete two operation flows, which are a circuit breaker trolley position locking flow and an unlocking flow of the switch cabinet, respectively, where the unlocking flow is shown in fig. 3 and specifically includes the following steps:

(1) Locking process: (1) the method comprises the steps that a master control system obtains identity information of a maintainer and verifies the identity information, after the identity information is verified successfully, a to-be-overhauled switch cabinet code input by the maintainer is obtained, and a first verification code is distributed to the to-be-overhauled switch cabinet; (2) the sub-control system acquires a second verification code which is automatically input by a maintainer based on the first verification code and sends the second verification code to the main control system, the main control system matches the first verification code with the second verification code, and when the matching is successful, a first matching success signal is sent to the sub-control system; (3) the sub-control system acquires a locking trigger signal input by a maintainer based on a first matching success signal sent by the main control system; the sub-control system acquires identity information of a maintainer based on the locking trigger signal and sends the identity information to the main control system; (4) the master control system acquires identity information of a maintainer, which is sent by the sub-control system, verifies the identity information, and sends a first verification success signal to the sub-control system after the identity information is verified successfully; (5) the sub-control system sends a locking signal to the driving interlocking device based on the obtained first verification success signal and the obtained locking trigger signal sent by the main control system, and the locking signal is used for controlling the driving interlocking device to lock the position of a circuit breaker trolley of the switch cabinet to be overhauled.

Specifically, the interlocking protection system of the switch cabinet shown in fig. 1 and 2 is taken as an example for explanation, when an overhaul person overhauls the switch cabinet, an iris collector of a main control system firstly identifies the iris of the overhaul person, a main control CPU module performs matching verification on the identified iris of the overhaul person and iris information of the overhaul person stored in a database, after the verification is successful, the overhaul person can input a code of the switch cabinet to be overhauled through an HMI touch screen module, the main control CPU allocates a unique first verification code in the overhaul to the switch cabinet to be overhauled based on the code of the switch cabinet to be overhauled, and the HMI touch screen module displays the first verification code; then, after the maintainer confirms that the breaker trolley of the switch cabinet to be overhauled is in the open position, a second verification code is automatically input into an HMI touch screen of the sub-control system, the sub-control CPU module sends the second verification code to the main control CPU module, the main control CPU module matches the second verification code with the first verification code, and when the second verification code and the first verification code are completely the same, the main control CPU module sends a first matching success signal to the sub-control system; then, the overhaul personnel select to press down a locking option on an HMI touch screen of a sub-control CPU module of the sub-control system (namely, the sub-control CPU module acquires a locking trigger signal input by the overhaul personnel), an iris collector of the sub-control system identifies the iris of the overhaul personnel, the sub-control CPU module sends the identified iris information to a main control CPU module, the main control CPU module carries out matching verification on the identified iris of the overhaul personnel and the iris information of the overhaul personnel stored in a database, and when the verification is successful, a first verification success signal is sent to the sub-control system; and then the sub-control CPU module sends a locking signal to the drive interlocking device based on the first verification success signal and the locking trigger signal.

It should be noted that, after the main control CPU module matches the first verification code with the second verification code, and the first verification code and the second verification code are successfully matched, the main control CPU also sends a motor disconnection interlock locking signal to the distributed control system, where the motor disconnection interlock locking signal is used to control the Distributed Control System (DCS) to turn off an interlock mechanism between the motor and the switch cabinet.

(2) An unlocking process: (1) the sub-control system also acquires a third verification code which is automatically input by a maintainer based on the first verification code and sends the third verification code to the main control system; the master control system matches the first verification code with the third verification code, and when the matching is successful, a second matching success signal is sent to the sub-control system; (2) the sub-control systems acquire unlocking trigger signals input by maintainers based on second matching success signals sent by the main control system; the sub-control system acquires identity information of a maintainer based on the unlocking trigger signal and sends the identity information to the main control system; (3) the master control system acquires identity information of the maintainers sent by the sub-control system and verifies the identity information, and after the identity information is verified successfully, a second verification success signal is sent to the sub-control system; (4) and the sub-control system sends an unlocking signal to the driving interlocking device based on the obtained second verification success signal and the unlocking trigger signal, and the unlocking signal is used for controlling the driving interlocking device to unlock the position of the circuit breaker trolley of the switch cabinet to be overhauled.

Specifically, the interlocking protection system of the switch cabinet shown in fig. 1 and 2 is taken as an example for explanation, when an overhaul personnel overhauls the switch cabinet, the overhaul personnel inputs a third verification code through an HMI touch screen module of a sub-control system, the sub-control CPU module sends the third verification code to a main control CPU module, the main control CPU module matches the first verification code with the third verification code, and when the first verification code and the third verification code are completely the same, a second matching success signal is sent to the sub-control CPU module; then, the overhaul personnel select to press down a locking option on an HMI touch screen of a sub-control CPU module of the sub-control system (namely, the sub-control CPU module acquires an unlocking trigger signal input by the overhaul personnel), an iris collector of the sub-control system identifies the iris of the overhaul personnel, the sub-control CPU module sends the identified iris information to a main control CPU module, the main control CPU module carries out matching verification on the identified iris of the overhaul personnel and the iris information of the overhaul personnel stored in a database, and when the verification is successful, a second verification success signal is sent to the sub-control system; and then the sub-control CPU module sends an unlocking signal to the drive interlocking device based on the second verification success signal and the unlocking trigger signal.

Specifically, the embodiment of the present invention provides two security lines, that is, a first verification code and the identity information of the maintenance personnel, wherein the first verification code corresponds to the switch cabinet to be maintained, so as to prevent the maintenance personnel from performing misoperation, for example: should actually overhaul cubical switchboard #1, but because the factor of proper motion, the maintainer overhauls cubical switchboard #2, leads to the phenomenon that maintenance time is long, maintenance efficiency is poor from this. The maintainer identity information is corresponding with the personnel that can implement the maintenance operation to the condition such as not the maintainer operates, and leads to the cubical switchboard damage.

Specifically, in the locking process, the main control CPU of the embodiment of the present invention allocates a unique first verification code in the current maintenance to the to-be-maintained switch cabinet based on a code of the to-be-maintained switch cabinet, and displays the first verification code on the HMI touch screen, after acquiring the first verification code, the maintenance worker moves to the front of the to-be-maintained switch cabinet by himself/herself and inputs a second verification code by himself/herself, and the input second verification code is input by the maintenance worker by himself/herself based on the acquired first verification code, so that the second verification code input by the maintenance worker may be identical to or not identical to the first verification code, and thus in order to save maintenance time and prevent the maintenance worker from performing maintenance on the switch cabinet that does not need to perform maintenance, the main control CPU verifies the second verification code, and only when the second verification code is identical to the first verification code, the current switch cabinet can be determined as the to-be-maintained switch cabinet. The method comprises the steps that a first verification code is input into a branch control system of the current switch cabinet, a second verification code is input into the branch control system of the current switch cabinet, the input second verification code is input into the branch control system of the current switch cabinet by self based on the acquired first verification code, and therefore the third verification code input by the maintainer is possibly identical to or not identical to the first verification code, so that the third verification code needs to be verified, and only if the third verification code is identical to the first verification code, the current switch cabinet can be judged to be the switch cabinet which is overhauled at this time.

Further, taking the interlock protection system of the switch cabinet shown in fig. 1 and 2 as an example for explanation, the sub-control CPU module sends an unlocking signal to the drive interlock device based on the second verification success signal and the unlocking trigger signal, and then the maintainer can also perform verification and cancellation of the present retrieval task, and the process includes: the method comprises the steps that a main control system obtains identity information of a maintainer and verifies the identity information, and after the identity information is verified successfully, a to-be-overhauled switch cabinet code input by the maintainer is obtained; and the master control system cancels and clears the first verification code based on the switch cabinet code to be overhauled.

Specifically, the interlocking protection system of the switch cabinet shown in fig. 1 and 2 is taken as an example for explanation, an iris collector of the main control system firstly identifies the iris of the maintainer, the main control CPU module performs matching verification on the identified iris of the maintainer and the iris information of the maintainer stored in the database, after the verification is successful, the maintainer can input the code of the switch cabinet to be overhauled through the HMI touch screen module, and the main control CPU cancels and clears the first verification code based on the code of the switch cabinet to be overhauled.

It should be noted that, after the main control CPU module matches the first verification code and the third verification code, and the first verification code and the third verification code are successfully matched, the main control CPU also sends a motor communication interlock locking signal to the distributed control system, and the motor communication interlock locking signal is used for controlling the Distributed Control System (DCS) to open an interlock mechanism between the motor and the switch cabinet. It should be noted that the data module of the main control system in the embodiment of the present invention may store information such as an iris, a verification code, and the like, which is operated by a service person in each task, and the information may be uploaded to the plant monitoring system through the internet ethernet module.

It should be noted that the first verification code, the second verification code, and the third verification code may be a combination of numbers, letters, and the like, and are not limited herein.

Example 2

The embodiment of the invention provides an interlocking protection method of a switch cabinet, which is applied to a main control system shown in fig. 1, and comprises a locking method and an unlocking method, wherein the locking method is shown in fig. 4 and comprises the following steps:

step S11: the method comprises the steps of obtaining identity information of a maintainer and verifying the identity information, obtaining a to-be-overhauled switch cabinet code input by the maintainer after the identity information is verified successfully, and distributing a first verification code for the to-be-overhauled switch cabinet.

Specifically, the interlocking protection system of the switch cabinet shown in fig. 1 and 2 is taken as an example for explanation, when an overhaul person overhauls the switch cabinet, an iris collector of the main control system firstly identifies the iris of the overhaul person, the main control CPU module performs matching verification on the identified iris of the overhaul person and the iris information of the overhaul person stored in the database, after the verification is successful, the overhaul person can input a code of the switch cabinet to be overhauled through the HMI touch screen module, the main control CPU allocates a unique first verification code in the overhaul to the switch cabinet to be overhauled based on the code of the switch cabinet to be overhauled, and the HMI touch screen module displays the first verification code.

Step S12: and acquiring a second verification code sent by the sub-control system.

Specifically, the interlocking protection system of the switch cabinet shown in fig. 1 and 2 is taken as an example for explanation, after the maintainer confirms that the breaker trolley of the switch cabinet to be overhauled is in the open position, a second verification code is input on the HMI touch screen of the sub-control system, and the sub-control CPU module sends the second verification code to the main control CPU module.

Step S13: and matching the first verification code with the second verification code, and when the matching is successful, sending a first matching success signal to the sub-control system, wherein the first matching success signal is used for controlling the sub-control system to acquire a locking trigger signal input by a maintainer, and the locking trigger signal is used for controlling the sub-control system to acquire identity information of the maintainer.

Specifically, taking the interlock protection system of the switch cabinet shown in fig. 1 and 2 as an example for explanation, the main control CPU module matches the second verification code with the first verification code, and when the two are completely the same, the main control CPU module sends a first matching success signal to the sub-control system.

Step S14: the method comprises the steps of obtaining identity information of a maintenance worker sent by a sub-control system and verifying the identity information, sending a first verification success signal to the sub-control system after the identity information is verified successfully, wherein the first verification success signal is used for controlling the sub-control system to send a locking signal, and the locking signal is used for controlling a driving interlocking device to lock the position of a breaker trolley of a switch cabinet to be maintained.

Specifically, the interlocking protection system of the switch cabinet shown in fig. 1 and 2 is taken as an example for explanation, an overhaul person selects to press down a locking option on an HMI touch screen of a sub-control CPU module of a sub-control system (that is, the sub-control CPU module acquires a locking trigger signal input by the overhaul person), an iris collector of the sub-control system identifies the iris of the overhaul person, the sub-control CPU module sends the identified iris information to a main control CPU module, the main control CPU module performs matching verification on the identified iris of the overhaul person and the iris information of the overhaul person stored in a database, and when the verification is successful, a first verification success signal is sent to the sub-control system; and then the sub-control CPU module sends a locking signal to the drive interlocking device based on the first verification success signal and the locking trigger signal.

In a specific embodiment, as shown in fig. 5, the unlocking method in the interlock protection method for a switch cabinet further includes:

step S21: and acquiring a third verification code sent by the sub-control system, matching the first verification code with the third verification code, and sending a second matching success signal to the sub-control system when the matching is successful, wherein the second matching success signal is used for controlling the sub-control system to acquire an unlocking trigger signal input by a maintainer.

Specifically, the interlocking protection system of the switch cabinet shown in fig. 1 and 2 is taken as an example for explanation, after the maintenance personnel complete maintenance of the switch cabinet, the maintenance personnel inputs a third verification code through an HMI touch screen module of the sub-control system, the sub-control CPU module sends the third verification code to the main control CPU module, the main control CPU module matches the first verification code with the third verification code, and when the first verification code and the third verification code are completely the same, a second matching success signal is sent to the sub-control CPU module.

Step S22: the method comprises the steps of obtaining identity information of a maintainer, sent by a sub-control system, verifying, sending a second verification success signal to the sub-control system after the identity information is verified successfully, wherein the second verification success signal is used for controlling the sub-control system to send an unlocking signal, and the unlocking trigger signal is used for controlling the sub-control system to obtain the identity information of the maintainer.

Specifically, the interlocking protection system of the switch cabinet shown in fig. 1 and 2 is taken as an example for explanation, an inspector selects and presses a locking option on an HMI touch screen of a sub-control CPU module of a sub-control system (that is, the sub-control CPU module acquires an unlocking trigger signal input by the inspector), an iris collector of the sub-control system identifies an iris of the inspector, the sub-control CPU module sends identified iris information to a main control CPU module, the main control CPU module performs matching verification on the identified iris of the inspector and the iris information of the inspector stored in a database, and when the verification is successful, a second verification success signal is sent to the sub-control system; and then the sub-control CPU module sends an unlocking signal to the drive interlocking device based on the second verification success signal and the unlocking trigger signal.

Specifically, the embodiment of the present invention provides two security lines, that is, a first verification code and the identity information of the maintenance personnel, wherein the first verification code corresponds to the switch cabinet to be maintained, so as to prevent the maintenance personnel from performing misoperation, for example: should actually overhaul cubical switchboard #1, but because subjective factor, the maintainer overhauls cubical switchboard #2, leads to the phenomenon that overhauls time is long, maintenance efficiency is poor from this. The maintainer identity information is corresponding with the personnel that can implement the maintenance operation to prevent that non-maintainer operates, and lead to the circumstances such as cubical switchboard damage.

In a specific embodiment, the interlock protection method of the switch cabinet further comprises: acquiring identity information of a maintainer and verifying the identity information, and acquiring a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified; and logging out and clearing the first verification code based on the switch cabinet code to be overhauled.

Specifically, taking the interlock protection system of the switch cabinet shown in fig. 1 and 2 as an example for explanation, the sub-control CPU module sends an unlocking signal to the drive interlock device based on the second verification success signal and the unlocking trigger signal, and then the service man can also perform verification and cancellation of the present retrieval task, and the process includes: the method comprises the steps that a master control system obtains identity information of a maintainer and verifies the identity information, and after the identity information is verified successfully, a switch cabinet code to be overhauled, which is input by the maintainer, is obtained; and the master control system cancels and clears the first verification code based on the switch cabinet code to be overhauled.

In a specific embodiment, the interlock protection method of the switch cabinet further comprises: and when the first verification code and the second verification code are successfully matched, sending a motor disconnection interlocking locking signal to the distributed control system, wherein the motor disconnection interlocking locking signal is used for controlling the distributed control system to close an interlocking mechanism of the motor and the switch cabinet.

In a specific embodiment, the interlock protection method of the switch cabinet further comprises: when the first verification code is cancelled, a motor communication interlocking locking signal is sent to the distributed control system at the same time, and the motor communication interlocking locking signal is used for controlling the distributed control system to start an interlocking mechanism of the motor and the switch cabinet.

Example 3

The embodiment of the invention provides an interlocking protection method of a switch cabinet, which is applied to a sub-control system shown in fig. 1 and 2, the interlocking protection method comprises a locking method and an unlocking method, and as shown in fig. 6, the locking method comprises the following steps:

step S31: and acquiring a second verification code corresponding to the to-be-overhauled switch cabinet input by the maintainer, and sending the second verification code to the main control system. For details, refer to the related description of step S11 in the above method embodiment, and are not described herein again.

Step S32: and acquiring a locking trigger signal input by a maintainer based on a first matching success signal sent by the master control system, wherein the master control system matches the first verification code with the second verification code, and when the matching is successful, the master control system sends a first matching success signal. For details, refer to the related description of step S12 in the above method embodiment, and are not repeated herein.

Step S33: and acquiring identity information of the maintainers based on the locking trigger signal, and sending the identity information to the master control system. For details, refer to the related description of step S13 in the above method embodiment, and are not described herein again.

Step S34: and sending a locking signal to the driving interlocking device based on the acquired first verification success signal sent by the master control system, wherein the master control system verifies the identity information of the maintainers, and after the identity information is verified successfully, the master control system sends the first verification success signal which is used for controlling the driving interlocking device to lock the position of the circuit breaker trolley of the switch cabinet to be overhauled. For details, refer to the related description of step S14 in the above method embodiment, and are not repeated herein.

In a specific embodiment, as shown in fig. 7, the unlocking method of the interlock protection method of the switch cabinet includes:

step S41: and acquiring a third verification code input by the maintainer, and sending the third verification code to the master control system.

Step S42: and acquiring an unlocking trigger signal input by a maintainer based on a second matching success signal sent by the master control system, wherein the master control system matches the first verification code with the third verification code, and when the matching is successful, the master control system sends a second matching success signal.

Step S43: and acquiring the identity information of the maintainer based on the unlocking trigger signal, and sending the identity information to the master control system.

Step S44: and sending an unlocking signal to the driving interlocking device based on the obtained second verification success signal sent by the master control system, wherein the master control system verifies the identity information of the maintainers, and after the identity information is verified successfully, the master control system sends the second verification success signal which is used for controlling the driving interlocking device to unlock the position of the circuit breaker trolley of the switch cabinet to be overhauled.

For details, refer to the related description of steps S21 to S22 in the above method embodiment, and are not described herein again.

Example 4

An embodiment of the present invention provides an interlock protection device for a switch cabinet, as shown in fig. 8, including:

the verification code distribution module 11 is used for acquiring and verifying identity information of a maintainer, acquiring a to-be-repaired switch cabinet code input by the maintainer after the identity information is successfully verified, and distributing a first verification code to the to-be-repaired switch cabinet; this module executes the method described in step S11 in embodiment 2, which is not described herein again.

The first obtaining module 12 is configured to obtain a second verification code sent by the sub-control system; this module executes the method described in step S12 in embodiment 2, and is not described herein again.

The first matching module 13 is configured to match the first verification code with the second verification code, and when the matching is successful, send a first matching success signal to the sub-control system, where the first matching success signal is used to control the sub-control system to obtain a locking trigger signal input by the maintenance personnel, and the locking trigger signal is used to control the sub-control system to obtain identity information of the maintenance personnel; this module executes the method described in step S13 in embodiment 2, which is not described herein again.

The first verification module 14 is configured to acquire identity information of the maintenance personnel sent by the sub-control system and perform verification, and send a first verification success signal to the sub-control system after the identity information is successfully verified, where the first verification success signal is used to control the sub-control system to send a locking signal, and the locking signal is used to control the driving interlocking device to lock the position of a breaker trolley of the switch cabinet to be maintained; this module executes the method described in step S14 in embodiment 2, and is not described herein again.

In a specific embodiment, as shown in fig. 9, the interlock protection device of the switch cabinet further comprises:

the second matching module 21 is configured to obtain a third verification code sent by the sub-control system, match the first verification code with the third verification code, and send a second matching success signal to the sub-control system when the matching is successful, where the second matching success signal is used to control the sub-control system to obtain an unlocking trigger signal input by a maintainer, and the unlocking trigger signal is used to control the sub-control system to obtain identity information of the maintainer; this module executes the method described in step S21 in embodiment 2, which is not described herein again.

The second verification module 22 is configured to obtain identity information of the maintainers sent by the sub-control system and perform verification, and send a second verification success signal to the sub-control system after the identity information is successfully verified, where the second verification success signal is used to control the sub-control system to send an unlocking signal; this module executes the method described in step S22 in embodiment 2, which is not described herein again.

Example 5

An embodiment of the present invention provides an interlock protection device for a switch cabinet, as shown in fig. 10, including:

the second obtaining module 31 is used for obtaining a second verification code corresponding to the switch cabinet to be overhauled, which is input by an overhaul worker, and sending the second verification code to the main control system; this module executes the method described in step S31 in embodiment 3, which is not described herein again.

The third obtaining module 32 is configured to obtain a locking trigger signal input by a service man based on a first matching success signal sent by the master control system, where the master control system matches the first verification code with the second verification code, and when the matching is successful, the master control system sends the first matching success signal; this module executes the method described in step S32 in embodiment 3, which is not described herein again.

The fourth acquisition module 33 is used for acquiring the identity information of the maintainers based on the locking trigger signal and sending the identity information to the main control system; this module executes the method described in step S33 in embodiment 3, which is not described herein again.

The locking module 34 is configured to send a locking signal to the driving interlocking device based on the acquired first verification success signal sent by the master control system, where the master control system verifies the identity information of the maintenance personnel, and after the identity information is successfully verified, the master control system sends the first verification success signal, and the locking signal is used to control the driving interlocking device to lock the position of the breaker trolley of the switch cabinet to be maintained; this module executes the method described in step S34 in embodiment 3, which is not described herein again.

In a specific embodiment, as shown in fig. 11, the interlock protection device of the switch cabinet further includes:

the fifth obtaining module 41 is used for obtaining a third verification code input by a maintainer and sending the third verification code to the main control system; this module executes the method described in step S41 in embodiment 3, and is not described herein again.

A sixth obtaining module 42, configured to obtain an unlocking trigger signal input by a maintainer based on a second successful matching signal sent by the master control system, where the master control system matches the first verification code with the third verification code, and when matching is successful, the master control system sends the second successful matching signal; this module executes the method described in step S42 in embodiment 3, which is not described herein again.

The seventh obtaining module 43 is configured to obtain identity information of the maintainer based on the unlocking trigger signal, and send the identity information to the master control system; this module executes the method described in step S43 in embodiment 3, which is not described herein again.

The unlocking module 44 is used for sending an unlocking signal to the driving interlocking device based on the obtained second verification success signal sent by the main control system, wherein the main control system verifies the identity information of the maintainers, and after the identity information is verified successfully, the main control system sends the second verification success signal which is used for controlling the driving interlocking device to unlock the position of the breaker trolley of the switch cabinet to be overhauled; this module executes the method described in step S44 in embodiment 3, which is not described herein again.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.

Claims

1. An interlocking protection method of a switch cabinet is applied to a master control system, and comprises the following steps:

acquiring identity information of a maintainer and verifying the identity information, acquiring a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified, and distributing a first verification code for the to-be-overhauled switch cabinet;

acquiring a second verification code sent by the sub-control system;

matching the first verification code with the second verification code, and when the matching is successful, sending a first matching success signal to a sub-control system, wherein the first matching success signal is used for controlling the sub-control system to acquire a locking trigger signal input by a maintainer, and the locking trigger signal is used for controlling the sub-control system to acquire identity information of the maintainer;

the method comprises the steps of obtaining identity information of a maintenance worker sent by a sub-control system and verifying the identity information, sending a first verification success signal to the sub-control system after the identity information is verified successfully, wherein the first verification success signal is used for controlling the sub-control system to send a locking signal, and the locking signal is used for controlling a driving interlocking device to lock the position of a breaker trolley of a switch cabinet to be maintained.

2. The interlock protection method of a switch cabinet according to claim 1, further comprising:

acquiring a third verification code sent by the sub-control system, matching the first verification code with the third verification code, and sending a second matching success signal to the sub-control system when the matching is successful, wherein the second matching success signal is used for controlling the sub-control system to acquire an unlocking trigger signal input by a maintainer, and the unlocking trigger signal is used for controlling the sub-control system to acquire identity information of the maintainer;

the method comprises the steps of obtaining identity information of a maintainer, sent by a sub-control system, verifying, and sending a second verification success signal to the sub-control system after the identity information is successfully verified, wherein the second verification success signal is used for controlling the sub-control system to send an unlocking signal.

3. The interlock protection method of a switch cabinet according to claim 2, further comprising:

acquiring identity information of a maintainer and verifying the identity information, and acquiring a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified;

and canceling and clearing the first verification code based on the switch cabinet code to be overhauled.

4. The interlock protection method of a switch cabinet according to claim 2, further comprising:

and when the first verification code and the second verification code are successfully matched, sending a motor disconnection interlocking locking signal to the distributed control system, wherein the motor disconnection interlocking locking signal is used for controlling the distributed control system to close an interlocking mechanism of a motor and the switch cabinet.

5. The interlock protection method for a switch cabinet according to claim 4, further comprising:

and when the first verification code is cancelled and cleared, simultaneously sending a motor communication interlocking locking signal to the distributed control system, wherein the motor communication interlocking locking signal is used for controlling the distributed control system to start an interlocking mechanism of the motor and the switch cabinet.

6. An interlocking protection method of a switch cabinet is applied to a branch control system, and comprises the following steps:

acquiring a second verification code corresponding to the to-be-overhauled switch cabinet input by an overhaul worker, and sending the second verification code to the main control system;

the method comprises the steps of acquiring a locking trigger signal input by a maintainer based on a first matching success signal sent by a master control system, wherein the master control system is used for matching a first verification code with a second verification code, and when the matching is successful, the master control system sends a first matching success signal, wherein the first verification code generating process comprises the following steps: acquiring identity information of a maintainer and verifying the identity information, acquiring a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified, and distributing a first verification code for the to-be-overhauled switch cabinet;

acquiring identity information of a maintainer based on the locking trigger signal, and sending the identity information to a master control system;

and sending a locking signal to the driving interlocking device based on an acquired first verification success signal sent by the main control system, wherein the main control system verifies the identity information of the maintainers, and after the identity information is verified successfully, the main control system sends the first verification success signal which is used for controlling the driving interlocking device to lock the position of the breaker trolley of the switch cabinet to be overhauled.

7. The interlock protection method of a switch cabinet according to claim 6, further comprising:

acquiring a third verification code input by a maintainer, and sending the third verification code to the master control system;

acquiring an unlocking trigger signal input by a maintainer based on a second matching success signal sent by a master control system, wherein the first verification code and the third verification code are matched by the master control system, and when the matching is successful, the master control system sends a second matching success signal;

acquiring identity information of a maintainer based on the unlocking trigger signal, and sending the identity information to a master control system;

and sending an unlocking signal to the driving interlocking device based on the obtained second verification success signal sent by the master control system, wherein the master control system verifies the identity information of the maintainers, and when the identity information is verified successfully, the master control system sends the second verification success signal which is used for controlling the driving interlocking device to unlock the position of the breaker trolley of the switch cabinet to be overhauled.

8. An interlock protection device of a switch cabinet is characterized by comprising:

the verification code distribution module is used for acquiring and verifying identity information of a maintainer, acquiring a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified, and distributing a first verification code to the to-be-overhauled switch cabinet;

the first acquisition module is used for acquiring a second verification code sent by the sub-control system;

the first matching module is used for matching the first verification code with the second verification code, and when the matching is successful, sending a first matching success signal to a sub-control system, wherein the first matching success signal is used for controlling the sub-control system to acquire a locking trigger signal input by a maintainer, and the locking trigger signal is used for controlling the sub-control system to acquire identity information of the maintainer;

the first verification module is used for acquiring identity information of maintenance personnel sent by the sub-control system and verifying the identity information, and sending a first verification success signal to the sub-control system after the identity information is verified successfully, wherein the first verification success signal is used for controlling the sub-control system to send a locking signal, and the locking signal is used for controlling the driving interlocking device to lock the position of a breaker trolley of the switch cabinet to be maintained.

9. The interlock protection device of a switchgear cabinet according to claim 8, further comprising:

the second matching module is used for acquiring a third verification code sent by the sub-control system, matching the first verification code with the third verification code, and sending a second matching success signal to the sub-control system when the matching is successful, wherein the second matching success signal is used for controlling the sub-control system to acquire an unlocking trigger signal input by a maintainer, and the unlocking trigger signal is used for controlling the sub-control system to acquire identity information of the maintainer;

and the second verification module is used for acquiring and verifying the identity information of the maintainers, which is sent by the sub-control system, and sending a second verification success signal to the sub-control system after the identity information is successfully verified, wherein the second verification success signal is used for controlling the sub-control system to send an unlocking signal.

10. An interlock protection device of a switch cabinet is characterized by comprising:

the second acquisition module is used for acquiring a second verification code corresponding to the to-be-overhauled switch cabinet input by an overhaul worker and sending the second verification code to the main control system;

the third acquisition module is used for acquiring a locking trigger signal input by a maintainer based on a first matching success signal sent by a master control system, wherein the master control system matches a first verification code with a second verification code, and when the matching is successful, the master control system sends a first matching success signal, wherein the first verification code generation process comprises the following steps: acquiring identity information of a maintainer and verifying the identity information, acquiring a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified, and distributing a first verification code for the to-be-overhauled switch cabinet;

the fourth acquisition module is used for acquiring identity information of the maintainers based on the locking trigger signal and sending the identity information to the main control system;

the locking module is used for sending a locking signal to the driving interlocking device based on an acquired first verification success signal sent by the main control system, wherein the main control system verifies the identity information of the maintainers, and when the identity information is verified successfully, the main control system sends the first verification success signal which is used for controlling the driving interlocking device to lock the position of a breaker trolley of the switch cabinet to be overhauled.

11. The interlock protection device for a switchgear cabinet according to claim 10, further comprising:

the fifth acquisition module is used for acquiring a third verification code input by a maintainer and sending the third verification code to the master control system;

a sixth obtaining module, configured to obtain, based on a second matching success signal sent by the master control system, an unlocking trigger signal input by a service man, where the master control system matches the first verification code with the third verification code, and when matching is successful, the master control system sends a second matching success signal;

the seventh acquisition module is used for acquiring the identity information of the maintainers based on the unlocking trigger signal and sending the identity information to the main control system;

and the unlocking module is used for sending an unlocking signal to the driving interlocking device based on an acquired second verification success signal sent by the main control system, wherein the main control system verifies the identity information of the maintainer, and when the identity information is verified successfully, the main control system sends a second verification success signal which is used for controlling the driving interlocking device to unlock the position of a circuit breaker trolley of the switch cabinet to be overhauled.

12. An interlock protection system for a switchgear, comprising: a main control system and a sub-control system, wherein,

the master control system acquires and verifies identity information of a maintainer, acquires a to-be-overhauled switch cabinet code input by the maintainer after the identity information is successfully verified, and distributes a first verification code to the to-be-overhauled switch cabinet;

the sub-control system acquires a second verification code input by a maintainer based on a first verification code and sends the second verification code to the main control system, the main control system matches the first verification code with the second verification code, and when the matching is successful, a first matching success signal is sent to the sub-control system;

the sub-control system acquires a locking trigger signal input by a maintainer based on a first matching success signal sent by the main control system; the sub-control system acquires identity information of a maintainer based on the locking trigger signal and sends the identity information to the main control system;

the master control system acquires identity information of a maintainer, which is sent by the sub-control system, verifies the identity information, and sends a first verification success signal to the sub-control system after the identity information is successfully verified;

the sub-control system sends a locking signal to the driving interlocking device based on the acquired first verification success signal sent by the main control system and the locking trigger signal, wherein the locking signal is used for controlling the driving interlocking device to lock the position of a breaker trolley of the switch cabinet to be overhauled.

13. The interlock protection system for a switchgear cabinet according to claim 12,

the sub-control system also acquires a third verification code input by a maintainer based on the first verification code and sends the third verification code to the main control system; the master control system matches the first verification code with the third verification code, and when the matching is successful, a second matching success signal is sent to the sub-control system;

the sub-control system acquires an unlocking trigger signal input by a maintainer based on a second matching success signal sent by the main control system; the sub-control system acquires identity information of a maintainer based on the unlocking trigger signal and sends the identity information to the main control system;

the master control system acquires identity information of a maintainer, which is sent by the sub-control system, verifies the identity information, and sends a second verification success signal to the sub-control system after the identity information is verified successfully;

and the sub-control system sends an unlocking signal to the driving interlocking device based on the obtained second verification success signal and the unlocking trigger signal, wherein the unlocking signal is used for controlling the driving interlocking device to unlock the position of a breaker trolley of the switch cabinet to be overhauled.