CN103594262A - Control system and method for grounding knife switch of lines of switchgear - Google Patents

Abstract

The invention discloses a control system and method for a circuit grounding switch of a switch cabinet. The electrification of the electroscope is detected by a computer key. When the electroscope is powered on, the locking device is forced to be locked. This scheme first detects whether the electroscope is charged, and judges whether to unlock it according to the charged situation, and then allows the lock to be unlocked after confirming that there is no electricity, so as to realize the mandatory locking of the corresponding equipment, thereby avoiding human misoperation during the switching operation and making the medium voltage of the substation The anti-misoperation of the switchgear is technically guaranteed, which further ensures the personal safety of the operator, as well as the safety of the power grid system and equipment. At the same time, the system has simple structure and convenient operation, which improves the labor efficiency of operators.

Description

A switch cabinet line grounding knife switch control system and method

technical field

The invention relates to the field of grounding knife switch control, in particular to a control system and method for a circuit grounding knife switch of a switch cabinet.

Background technique

In the power system, various accidents often occur, among which "live and grounding knife switch or grounding wire" is particularly serious, which will cause power grid accidents and personal accidents.

At present, the switch station mainly uses mechanical locks to artificially control the grounding operation mechanism. The traditional mechanical anti-misoperation locking mainly relies on the installation of mechanical locks on the stroke position of electrical equipment, and completes the locks through mechanical transmission devices. The function is relatively single, and the switch failure rate is high.

The traditional electromagnetic anti-mislocking is a kind of on-site electrical interlocking technology. It is mainly connected through the auxiliary contacts of related equipment, connected in series to the secondary circuit, and the locking is realized through electromagnetic devices. However, the electromagnetic anti-mislocking needs to be loaded with a large number of secondary cables. , the wiring method is complicated, and the operation and maintenance are more difficult.

Therefore, it is very necessary to carry out the electric inspection operation on the existing grounding knife switch operation to realize the electric inspection anti-misoperation locking operation with simple structure, safety and reliability.

Contents of the invention

In view of this, the present invention provides a switch cabinet line grounding knife switch control system and method to solve the problem of lack of simple structure, safe and reliable electric inspection anti-misoperation locking operation in the prior art. The specific scheme is as follows:

A switch cabinet line grounding knife switch control system, which is connected with the grounding knife switch, includes: a computer key, an electroscope connected with the grounding knife switch, a locking lockset connected with the computer key,

The computer key detects the electrification of the electroscope, and when it detects that the electroscope has no electricity, it unlocks the locking device, controls the closing of the grounding knife switch, and when it detects that the electroscope has electricity, unlocks the locking device. Perform mandatory locking.

Further, it also includes: a mechanical lock connected with the computer key,

After the computer key unlocks the locking device, it is judged whether the lock code of the mechanical lock is correct, and if it is correct, the locking device is unlocked; otherwise, the locking device is forced to be locked.

Further, it also includes: a signal lamp, when it is detected that the electroscope has power, the locking device is forced to be locked, and the signal lamp is controlled to be on at the same time.

Further, the locking lock is specifically: GYNS locking lock.

Further, the GYNS locking device includes: an emergency unlocking mechanism for unlocking under special circumstances.

A method for controlling a circuit grounding switch of a switch cabinet, comprising:

Detect whether the electroscope is charged;

When there is no power, unlock the locking device and control the closing of the grounding knife switch; otherwise, it is forced to lock.

Further, it also includes:

When there is no power, verify whether the lock code of the mechanical lock is correct;

If correct, unlock the locking device; otherwise, force locking.

Further, before checking whether the electroscope is charged, it also includes:

Read the electric inspection code to judge whether the electric inspection code is correct;

If it is correct, check whether the electroscope is charged; if it is not correct, it is forced to lock.

Further, it also includes: mandatory locking, and at the same time, the control signal light is turned on.

Further, it also includes:

The inspection electroscope is electrified, and under special circumstances, the locked locks are unlocked through the emergency unlocking mechanism.

It can be seen from the above technical solutions that the switch cabinet line grounding knife switch control system and method disclosed in the present invention detect the electrification of the electroscope through the computer key, and when it is detected that the electroscope has no electricity, unlock the locking device and control the grounding. The knife switch is closed, and when it is detected that the electroscope has power, the locking device is forced to be locked. This scheme first detects whether the electroscope is charged, and judges whether to unlock it according to the charging situation, and then allows unlocking after confirming that there is no electricity, so as to realize the mandatory locking of the corresponding equipment, thereby avoiding human misoperation during the switching operation and making the medium voltage of the substation The anti-misoperation of the switchgear is technically guaranteed, which further ensures the personal safety of the operator, as well as the safety of the power grid system and equipment. At the same time, the system has simple structure and convenient operation, which improves the labor efficiency of operators.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a switch cabinet line grounding knife switch control system disclosed in an embodiment of the present invention;

Fig. 2 is a flow chart of a switch cabinet line grounding knife switch control system disclosed by an embodiment of the present invention;

Fig. 3 is a flow chart of a switch cabinet line grounding knife switch control system disclosed by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

This embodiment discloses a switch cabinet line grounding knife switch control system, its structural diagram is shown in Figure 1, connected to the grounding knife switch, including:

The computer key 11 that links to each other with the grounding knife switch, the electroscope 12 that links to each other with the grounding knife switch, the blocking lockset 13.

The computer key 11 detects the charging situation of the electroscope 12, and when it is detected that the electroscope 12 has no electricity, the locking device 13 is unlocked, and after unlocking, the grounding switch is controlled to be closed.

When the computer key 11 detects that the electroscope 12 has electricity, the lock 13 is forced to be locked.

Wherein, the electroscope 12 and the locking device 13 are arranged on the switch cabinet, and are connected with the computer key 11 through wireless signals.

The switch cabinet line grounding switch control system disclosed in this embodiment detects the liveness of the electroscope through the computer key. When it detects that the When there is electricity, the locking lock is forced to lock. This scheme first detects whether the electroscope is charged, and judges whether to unlock it according to the charging situation, and then allows unlocking after confirming that there is no electricity, so as to realize the mandatory locking of the corresponding equipment, thereby avoiding human misoperation during the switching operation and making the medium voltage of the substation The anti-misoperation of the switchgear is technically guaranteed, which further ensures the personal safety of the operator, as well as the safety of the power grid system and equipment. At the same time, the system has simple structure and convenient operation, which improves the labor efficiency of operators.

Further, the switch cabinet line grounding switch control system disclosed in this embodiment may further include: a mechanical lock 14 .

The mechanical lock 14 is set on the switch cabinet and is connected with the computer key 11 through a wireless signal. When the computer key 11 detects that the electroscope 12 has no electricity, it detects whether the lock code of the mechanical lock 14 is correct. If it is correct, the locking lock 13 is unlocked. , otherwise, lockout is enforced.

The solution disclosed in this embodiment first detects whether the electroscope is charged. If it is not charged, it is necessary to detect the lock code of the mechanical lock. If the lock code of the mechanical lock is detected to be correct, it will be unlocked. If it is incorrect, it will prompt that the lock code does not match, and the unlocking will not be performed. The scheme disclosed in this embodiment implements double-layer protection for unlocking the grounding switch through double-layer unlocking, effectively avoiding production accidents caused by misoperation of the grounding switch and improving production safety.

Wherein, preferably, the locking device 13 is specifically a GYNS locking device.

Further, the GYNS locking lock includes: an emergency unlocking mechanism.

The emergency unlocking mechanism can verify whether it is in a special situation when the computer key verifies that the electroscope has electricity, and if so, it will be unlocked through the emergency unlocking mechanism.

Preferably, the switch cabinet line grounding knife switch control system disclosed in this embodiment may further include: a signal lamp 15 .

The signal lamp 15 is arranged on the switch cabinet, and is connected with the computer key 11 through a wireless signal.

When the computer key 11 detects that the electroscope 12 has electricity, the locking lockset 13 is forced to be locked. Misoperation of the grounding switch.

This embodiment discloses a method for controlling a circuit grounding knife switch of a switchgear, the flow chart of which is shown in Figure 2, including:

Step S21, detecting whether the electroscope is charged;

The computer key detects the electroscope, and detects whether the electroscope is electrified.

Step S22, when there is no power, unlock the locking device, and control the grounding switch to close; otherwise, execute step S23;

Step S23, forced locking.

The method for controlling the grounding knife switch of the switch cabinet line disclosed in this embodiment detects whether the electroscope is electrified, and when it is not electrified, unlocks the locking device to control the closing of the grounding knife switch, otherwise, locks it forcibly. This scheme first detects whether the electroscope is charged, and judges whether to unlock it according to the charging situation, and then allows unlocking after confirming that there is no electricity, so as to realize the mandatory locking of the corresponding equipment, thereby avoiding human misoperation during the switching operation and making the medium voltage of the substation The anti-misoperation of the switchgear is technically guaranteed, which further ensures the personal safety of the operator, as well as the safety of the power grid system and equipment. At the same time, the system has simple structure and convenient operation, which improves the labor efficiency of operators.

Further, the method for controlling the circuit grounding knife switch of the switch cabinet disclosed in this embodiment may further include:

Step S24, read the electric test code, judge whether the electric test code is correct, if correct, perform the subsequent steps, if not correct, perform step S23;

Before operating the equipment, the computer key first reads the electroscope code. If the electroscope code matches, it will check whether the electroscope is charged.

The scheme disclosed in this embodiment firstly verifies the electroscope code, and then verifies whether the electroscope is charged. Through double verification, the mandatory locking is realized, and at the same time, the misoperation of the grounding switch of the switch cabinet is effectively avoided, and the The purpose of efficient production, at the same time, to ensure the personal safety of operators and the safety of equipment.

Preferably, the switch cabinet line grounding knife switch control method disclosed in this embodiment may also include: when the computer key detects that the electroscope is charged, the lock is forced, and at the same time, the computer key controls the signal light to light up, which has played a role in reminding the operator , to reduce the possibility of misuse.

Preferably, in the solution disclosed in this embodiment, when the computer key detects that the electroscope is charged and there is a special situation, the computer key unlocks the locked lock through the emergency unlocking mechanism.

And the locking lock with emergency unlocking mechanism is GYNS locking lock.

This embodiment discloses a method for controlling a circuit grounding switch of a switchgear, the flow chart of which is shown in Figure 3, including:

Step S31, read the electric inspection code, and judge whether the electric inspection code is correct;

Step S32, if correct, check whether the electroscope is charged; otherwise, execute step S35;

Step S33, when there is no power, verify whether the lock code of the mechanical lock is correct; otherwise, execute step S35;

Adding the verification of the mechanical lock code can further prevent the misoperation of the grounding switch and ensure the safe operation of the line.

Step S34, if correct, unlock the locking device; otherwise, execute step S35;

Step S35, forcibly locking.

When the computer key judges that the electrical inspection code is incorrect, the computer key can also prompt that the conditions do not match while the lock is forced; when the computer key verifies that the lock code of the mechanical lock is incorrect, the computer key can also prompt that the lock code does not match while the lock is forced.

In the solution disclosed in this embodiment, by first judging whether the electroscope code is correct, then checking whether the electroscope is charged, and finally verifying whether the mechanical lock code is correct, the unlocking is only allowed after the triple judgment, so as to realize the mandatory locking of the equipment and effectively avoid Human misoperation is prevented, so that the anti-misoperation of the medium voltage switchgear in the substation is technically guaranteed, and the personal safety of the operator, as well as the safety of the power grid system and equipment are further ensured.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part.

Professionals can further realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the possible For interchangeability, in the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be directly implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A switch cabinet line grounding knife switch control system, which is connected with the grounding knife switch, is characterized in that it comprises: a computer key, an electroscope connected to the grounding knife switch, a locking lockset connected with the computer key, The computer key detects the electrification of the electroscope, and when it detects that the electroscope has no electricity, it unlocks the locking device, controls the closing of the grounding knife switch, and when it detects that the electroscope has electricity, unlocks the locking device. Perform mandatory locking. 2. The system according to claim 1, further comprising: a mechanical lock connected to the computer key, When the computer key detects that the electroscope has no electricity, it is judged whether the lock code of the mechanical lock is correct, and if it is correct, the lock is unlocked; otherwise, the lock is forcibly locked. 3. The system according to claim 1, further comprising: a signal light, when it is detected that the electroscope has power, the locking device is forced to be locked, and the signal light is controlled to be on at the same time. 4. The system according to claim 1, wherein the locking device is specifically: a GYNS locking device. 5. The system according to claim 4, characterized in that the GYNS locking lockset includes: an emergency unlocking mechanism to unlock under special circumstances. 6. A switch cabinet line grounding knife switch control method, characterized in that, comprising: Detect whether the electroscope is charged; When there is no power, unlock the locking device and control the closing of the grounding knife switch; otherwise, it is forced to lock. 7. The method according to claim 6, further comprising: When there is no power, verify whether the lock code of the mechanical lock is correct; If correct, unlock the locking device; otherwise, force locking. 8. The method according to claim 6, wherein before checking whether the electroscope is charged, it also includes: Read the electric inspection code to judge whether the electric inspection code is correct; If it is correct, check whether the electroscope is charged; if it is not correct, it is forced to lock. 9. The method according to claim 6, further comprising: forcibly locking, and at the same time, controlling the signal light to be on. 10. The method of claim 6, further comprising: The inspection electroscope is electrified, and under special circumstances, the locked locks are unlocked through the emergency unlocking mechanism.

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