CN112151300A - Device and method for preventing electrical misoperation of substation disconnecting switch - Google Patents

Abstract

The invention relates to a device and method for preventing electrical misoperation of an isolating switch in a substation. The device comprises an interface circuit, an optical communication interface, a switching value acquisition unit, a binary output module, and a logic judgment unit connected with the interface circuit. The technology of networking and sharing information of the present invention avoids the problem that the isolation switch needs to rely on a large number of control cables for electrical misoperation, and saves the usage of control cables; simplifies the complexity of the blocking circuit, and simplifies the electrical control circuit of the isolation switch. Improve the efficiency of equipment maintenance work; improve the safety performance of the equipment; make the blocking information of the substation isolating switch on the same graphic display unit, graphical display, the blocking and unlocking status of the isolating switch is displayed graphically and intuitively, which is clear at a glance, easy to monitor and isolate Electrically latched state of the switch.

Description

Device and method for preventing electrical misoperation of isolating switch in substation

technical field

The invention belongs to the field of electrical operation of power system substations, in particular to a device and method for preventing electrical misoperation of an isolating switch in a substation.

Background technique

The operation of the isolating switch in the substation of the power system needs to be operated according to a specific logic sequence. Different substations have different operation logics under the main wiring. The vicious misoperation of the isolating switch, such vicious misoperation may cause the equipment to burn down, or cause casualties or power grid instability accidents.

At present, the electrical blocking function of the electrically operable isolating switch equipment in the substation to prevent misoperation is realized by the way of connecting the control cable to the blocking circuit. , in order to realize the blocking function of an isolation switch to prevent misoperation, there are problems in using the control cable wiring method:

1. The blocking information cannot be shared, and the blocking information is transmitted by the control cable. It is impossible to realize the sharing of blocking information among multiple devices and realize a blocking logic. It is necessary to lay a control cable to access the position contact of the isolation switch through the form of cable wiring. To implement multiple logics, it is necessary to lay multiple control cables and access the position contact of the same isolation switch for multiple times;

2. The locking function is invalid due to the loose control cable wiring. Use the secondary wiring to realize the blocking logic on the circuit. When the control cable wiring is loose or wrong, the isolating switch will lose the electrical blocking function. If you modify the isolating switch blocking logic, you need to change the secondary wiring. , the construction is difficult;

3. The blocking logic requires a large number of control cable wiring to realize. When the blocked isolation switch is blocked by multiple other equipment states, a large number of control cables need to be laid to realize the function, and the circuit will become more complicated, which is not conducive to equipment maintenance;

4. The blocking status is not intuitive, and the blocking status display of the isolation switch is not intuitive. Professionals are required to check the status of the isolation switch and check the status of the blocking circuit to determine whether the blocking logic is normal.

SUMMARY OF THE INVENTION

In the substation, the electrical operation of the isolation switch can prevent misoperation, and the technical means of realizing the blocking function by the control cable wiring exist. The blocking information cannot be shared, the loose control cable wiring leads to the failure of the blocking function, and the blocking logic needs to rely on a large number of control cable wiring. To solve the problems of unintuitive realization and locking state, the present invention proposes a device and method for preventing electrical misoperation of an isolating switch in a substation.

The present invention collects the position state of the isolating switch near the isolating switch, and outputs the contact blocking information according to the set blocking logic, so as to realize the blocking function of the electrical anti-misoperation of the isolating switch, and finally reduce the electrical and anti-misoperation control cable of the isolating switch. The amount of usage and the lock status of the isolation switch are intuitively visible. The lock information of each isolation switch can be shared by multiple devices, making it easier and simpler to change or expand the lock function of the isolation switch.

The technical scheme of the present invention is as follows:

A device for preventing electrical misoperation of an isolating switch in a substation, comprising an interface circuit, an optical communication interface, a switch value acquisition unit, a switch value output module, and a logic judgment unit connected with the interface circuit;

The switch value acquisition unit is composed of the photoelectric isolation element and the signal processing circuit. The auxiliary contact of the external isolation switch position controls the light-emitting and extinguishing of the photoelectric isolation element, collects the digital state of the isolation switch position, and transmits the collected information to the logic judgment unit for logic. judge;

The logic judgment unit transmits the information state according to the collected switch value state, makes judgment according to the set logic, and outputs the locking and unlocking information according to the judgment result;

The electrical operation circuit of the controlled isolation switch is blocked or unlocked through the switch quantity output unit, and the collected switch quantity position and judgment result are transmitted to other devices and graphic display units through the optical fiber communication interface.

Further, the device also includes a plurality of signal lamps and a power source, the plurality of signal lamps are connected to the interface circuit, and the power source is connected to the interface circuit.

Further, at least one of the devices is installed in the isolation switch mechanism box.

Further, the optical communication interface is connected with the graphic display unit; the graphic display unit displays normal, abnormal, unlocked, and blocked graphic information; the optical communication interface is connected with the graphic display unit, receives the blocking information, and transmits it to the logic judgment unit through the interface circuit, At the same time, the blocking information transmitted by the logic judgment unit is received through the interface circuit, and the information is sent through the sending port.

Further, the switch value output unit receives the result of the logic judgment, and the switch value output unit connects the output contact in series with the electrical operation circuit of the isolation switch. The circuit is turned on, at this time unlocking the isolation switch electrical operation, the isolation switch can be electrically operated, when the logic is judged to be blocked, the open contact connected in series with the isolation switch electric operation circuit opens and disconnects the electric operation circuit, and the isolation switch is electrically operated. Latches cannot be operated electrically.

Further, it includes four indicator lights, which are running, abnormal, locked, and unlocked in sequence. The four indicator lights have different colors, and the running light is on and the abnormal light is off when normal;

When self-checking faults, output alarm information and alarm contacts, and output blocking amount to block the electrical operation of the isolation switch, and at the same time, the running light of the local device is off, the abnormal light is on, and the blocking light is on;

The amount of information collected by the switching value acquisition unit judges that the locking light is on and the unlocking light is off when the controlled isolation switch is in the locked state; when it is judged that the controlled isolating switch is not locked, the locking light is off and the unlocking light is on.

Further, the device is also provided with a debugging interface, the debugging interface is connected with the interface circuit, the debugging computer is connected with the debugging interface, the debugging computer writes to the device, reads the blocking logic, and retrieves the state of the device, and the device outputs a small sealed relay often. The closed air contact is connected in series to the electric operation circuit of the isolation switch. When the output blocking contact opens, the electrical operation circuit of the isolation switch is opened to realize the electrical blocking of the isolation switch. The small sealed relay is controlled by the logic judgment unit. The logic judgment is When locked, control the output relay contact to open and cut off the electrical operation circuit of the isolation switch. When the logic is determined to be unlocked, control the output relay contact to close to unlock the electrical operation circuit of the isolation switch, which has the function of electric operation.

A device for preventing electrical misoperation of an isolating switch in a substation of the present invention comprises a casing, a processor is arranged in the casing, and the processor is connected with a debugging interface, a switch output interface, an optical fiber communication interface, a power input interface, and a switch input interface ;Debugging interface, switch value output interface, optical fiber communication interface, power input interface, switch value input interface are arranged on one side of the casing; the graphic display unit is connected to the processor; the graphic display unit displays the normal, abnormal, unlocked, and locked graphics information;

The debugging interface is used to debug the computer to retrieve the state and blocking logic of the device. The processor outputs a small sealed relay normally closed empty contact, which is connected in series to the electric operation circuit of the isolation switch. The operation circuit is used to realize the electrical blocking of the isolation opening. The small sealed relay is controlled by the logic judgment unit. When it is judged to be blocked, the control output relay contact is opened to cut off the electrical operation circuit of the isolation switch. When it is judged to be unlocked, the control output relay contact is closed. Unlock the electrical operation circuit of the isolating switch and have the function of electrical operation;

The processor performs logical judgment according to the collected switch value state and the information state transmitted by other devices, and outputs the information of locking and unlocking.

The method of the above-mentioned device involved in the present invention is carried out as follows:

The switch value acquisition unit collects the position status of the isolation switch; the logic judgment unit transmits the information state according to the collected switch value status, makes logical judgment, and outputs the blocking and unlocking information; the electrical operation circuit of the controlled isolation switch is blocked or unlocked through the switch value output unit At the same time, the collected switch position and judgment result are transmitted to other on-site devices and graphic display units; wherein, when the logic is judged to be abnormal, the isolation switch is electrically blocked, and when the logic is judged to be normal, it is further judged whether to unlock, if necessary, Then release the isolation switch to close the lock, if not, then the isolation switch is electrically blocked.

Compared with the prior art, the beneficial effects of the present invention are as follows:

1. The present invention uses the technology of collecting information on the spot and forming a network to share information, avoiding the problem that the isolation switch needs to rely on a large number of control cables to prevent electrical misoperation, and saves the usage of control cables;

2. The present invention integrates all the complicated and tedious circuits on the circuit, the peripheral interface circuit has only a small number of input and output circuits, and the others are realized by communication and power circuits, which simplifies the complexity of the blocking circuit and simplifies the electrical control circuit of the isolation switch. Improve the efficiency of equipment maintenance work;

3. The present invention avoids the locking failure caused by the weak secondary wiring, and improves the safety performance of the equipment.

4. The present invention makes the blocking information of the isolating switch in the substation be the same on the graphic display unit, which can be displayed graphically, and the blocking and unlocking status of the isolating switch can be displayed graphically and intuitively, which is clear at a glance, and is convenient for monitoring the electrical blocking status of the isolating switch.

Description of drawings

Fig. 1 is the structural block diagram of the device of the present invention;

Fig. 2 is the main wiring schematic diagram of the present invention;

Fig. 3 is the schematic diagram that the graphic display unit of the present invention performs information interaction;

Fig. 4 is the flow chart of the method of the present invention;

Fig. 5 is the structural representation of the device of the present invention;

Among them, 1. Normal operation indicator; 2. Abnormal indicator; 3. Lock indicator; 4. Unlock indicator; 5. Debugging interface; 6. Optical fiber communication interface; 7. 220V power input interface; 8. Digital input interface ; 9. Switch output interface; 1M: 1 segment bus;

2M: 2-section busbar; 1MGD: 1-section busbar grounding switch; 2MGD: 2-section busbar grounding switch; 1G: 1 bus-side isolating switch; 2G: 2 bus-side isolating switch; The circuit breaker is connected to the line-side grounding switch; 3G: the line-side isolating switch; 3GD: the line-side grounding switch; QF: the circuit breaker.

Detailed ways

The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Unless otherwise defined, the technical or scientific terms used in the embodiments of the present application shall have the ordinary meanings understood by those with ordinary skill in the art. "First", "second" and similar words used in this embodiment do not denote any order, quantity or importance, but are only used to distinguish different components. "Comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. "Installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be Communication within two elements. "Top", "bottom", "left", "right", "horizontal" and "vertical" are only used relative to the orientation of the components in the drawings, these directional terms are relative concepts, they For relative description and clarification, it may vary accordingly depending on the orientation in which components are placed in the figures.

As shown in FIG. 1 , the device for preventing electrical misoperation of a substation isolation switch in this embodiment includes an interface circuit, an optical communication interface, a switch value acquisition unit, a switch value output module, and a logic judgment unit connected to the interface circuit.

The switch value acquisition unit is composed of the photoelectric isolation element and the signal processing circuit. The auxiliary contact of the external isolation switch position controls the light-emitting and extinguishing of the photoelectric isolation element, collects the digital state of the isolation switch position, and transmits the collected information to the logic judgment unit for logic. judge.

The logic judgment unit transmits the information state according to the collected switch quantity state, performs logic judgment, and outputs locking and unlocking information.

The electrical operation circuit of the controlled isolation switch is blocked or unlocked through the switch quantity output unit, and the collected switch quantity position and judgment result are transmitted to other local devices and graphic display units through the optical fiber communication interface.

The device of this embodiment adopts the photoelectric isolation technology to externally collect the position switch status of the isolation switch, receives the position status, locking, unlocking, and self-checking information of the isolation switch through the communication interface, and simultaneously sends the position status of the isolation switch, the device's position status through the communication interface. Blocking, unlocking and self-checking information, the device makes logical judgments based on the collected isolation switch position, blocking, unlocking, and blocking information. The logical judgments are output after program judgments based on the collected information, and the judgment results control the output contacts of the output modules. closed, disconnected.

The output contact is connected in series in the electrical operation circuit of the isolation switch. When the logic is determined to be unlocked, the open contact is closed, and the electrical operation circuit of the controlled isolation switch is turned on. At this time, the unlocking switch is electrically operated, and the isolation switch can be electrically operated. , When the logic is judged to be blocked, the open contact connected in series with the electrical operation circuit of the isolation switch opens and disconnects the electrical operation circuit, and the electrical operation of the isolation switch is blocked and cannot be electrically operated. At the same time, the result of the logical judgment will also light up the corresponding signal indicator to realize the intuitive visualization of the locking and unlocking status of the isolation switch. The appearance of the device is shown in Figure 5.

As shown in FIG. 5 , the device for preventing electrical misoperation of a substation isolating switch in this embodiment includes a casing, a processor is arranged in the casing, the processor and the debugging interface 5 , the switch output interface 9 (as a switch output unit), Optical fiber communication interface 6 (as a communication interface unit), 220V power input interface 7, digital input interface 8 (as a binary input acquisition unit), indicator light connection; debugging interface, digital output interface, optical fiber communication interface, power input interface . The switch input interface is arranged on one side of the casing; the graphic display unit is connected with the controller; the graphic display unit displays the graphic information of normal, abnormal, unlocked and locked. The indicator lights include normal operation indicator light 1, abnormal indicator light 2, lock indicator light 3, unlock indicator light 4, and the four indicator lights are green, yellow, red, and green in turn.

In this embodiment, a metal material is used as the casing, a circuit board is designed to integrate the above-mentioned units in the metal casing, and an interface circuit is used to connect the units to realize information exchange between the components.

As shown in Figure 3, in this implementation, two of the above-mentioned devices are installed in the isolation switch mechanism box, and information exchange is carried out with the graphic display unit through the optical fiber communication network. The optical fiber communication network, as the communication part, is composed of optical cables and optical switches. The DC 220V provides the power supply of the device, and the optical switch connects each local device and the graphic display unit to realize the data exchange between the devices.

Graphic display unit, the hardware is composed of a computer with optical fiber communication function, and the software is designed in the form of the main wiring diagram 1 of the substation. The communication of the locked unit, according to the collected position status of the isolation switch, the normal, abnormal, unlocked, and locked status of each blocking unit, convert the information into a graphic display of the closing and opening of the isolation switch, and convert the information to prevent electrical misoperation. Graphical display of normal, abnormal, unlocking and locking of the device.

The graphic display unit can issue control commands through human operation to control each locking unit to unlock and lock the output.

As shown in FIG. 4 , the method based on the above-mentioned device of this embodiment is performed as follows:

The switch value acquisition unit collects the position state of the isolation switch, and stores and shares the data through the processor; the logic judgment unit transmits the information state according to the collected switch value state, makes logical judgment, and outputs the locking and unlocking information; Unlock the electrical operation circuit of the controlled isolation switch, and transmit the collected switch position and judgment result to other local devices and graphic display units; when the logical judgment is abnormal, the isolation switch is electrically blocked, and when the logical judgment is normal , and further determine whether to unlock, if necessary, release the isolation switch to close the lock, if not, then the isolation switch is electrically locked.

The device is installed in the isolation switch mechanism box, and four indicator lights are set: running (green), abnormal (yellow), blocking (red), and unlocking (green). When the device is normal, the running (green) lights and the abnormal (yellow) lights When the device is self-checking fault, it outputs alarm information and alarm contacts, and outputs the blocking amount to block the electrical operation of the isolation switch. At the same time, the device running (green) light is off, the abnormal (yellow) light is on, and the blocking (red) light is on. .

The device judges that the controlled isolation switch is in the locked state through the amount of information collected from the communication port and its own switching value, the blocking (red) light is on, and the unlocking (green) light is off; when it is judged that the controlled isolating switch is not blocked, the blocking The (red) light turns off and the unlock (green) light turns on.

The device is provided with an optical fiber communication interface for information transmission after the device forms a network; the debugging interface is connected with the interface circuit, and the debugging computer is connected with the debugging interface. The debugging computer writes and reads the blocking logic to the device and retrieves the state of the device. The normally closed empty contact of the output small sealed relay is connected in series to the electric operation circuit of the isolation switch through the insulated cable of 2.5 square millimeters. When the output latching contact opens, the electrical operation circuit of the isolation switch is cut off, so as to realize the electrical latching of the isolation opening. The small sealed relay is controlled by the first logic judgment unit. When the logic is judged to be blocked, it controls the output relay contact to open and cut off the electrical operation circuit of the isolation switch. When the logic is judged to be unlocked, it controls the output relay contact to close to make the electrical operation circuit of the isolation switch. Unlock, with electric operation function.

The power input is DC 220V input, and the output 3~5V DC voltage is supplied through the interface circuit to provide working power for logic modules and communication interfaces, and the output 12V DC voltage is supplied through the interface circuit to switch value acquisition, switch value output, and signal light output modules as working power.

The switch value acquisition unit is composed of the photoelectric isolation element and the signal processing circuit. The auxiliary contact of the external isolation switch position controls the light of the photoelectric isolation element, extinguishes the digital state collected at the position of the isolation switch, and transmits the collected information to the interface circuit through the interface circuit. The logical judgment module performs logical judgment.

The communication interface is realized by receiving and transmitting ports and signal conversion circuit with optical fiber communication function. After receiving the blocking information sent by other devices, it is transmitted to the logic judgment module through the interface circuit, and at the same time, the blocking information transmitted by the logic judgment module is received through the interface circuit. , send information to other locking devices through the sending port.

The logic judgment unit is written into the blocking judgment program formulated according to the main wiring by the single-chip microcomputer with stable performance. According to the collected switching value status and the information status transmitted by other devices, the logic judgment is performed, and the blocking and unlocking information is output through the switching value output module. Or unlock the electrical operation circuit of the controlled isolation switch, and at the same time transmit the collected switch position and judgment result to other local devices and graphic display units through the optical fiber communication interface.

Figure 2 is a schematic diagram of one of the main wiring. This embodiment uses the schematic diagram 2 of the main wiring to formulate the blocking logic as follows:

(1) The isolating switch 1G collects the position information of the grounding switch 1MGD, isolating switch 1GD, and circuit breaker QF of a section of busbar. When the grounding switch 1MGD, isolating switch 1GD or the circuit breaker QF of a section of busbar is in the closing position, it is judged that the isolating switch 1G is blocked. When a section of busbar grounding switch 1MGD, isolating switch 1GD and circuit breaker QF are all in the off position, it is judged that isolating switch 1G is unlocked;

(2) The isolating switch 2G collects the position information of the two-stage busbar grounding switch 2MGD, isolating switch 1GD, and circuit breaker QF. When the two-stage busbar grounding switch 2MGD or isolating switch 1GD or circuit breaker QF is in the closed position, it is judged that the isolating switch 2G is closed. Blocking, when the second-stage busbar grounding switch 2MGD, isolating switch 1GD and circuit breaker QF are all in the open position, it is judged that 2G is unlocked;

(3) Grounding switch 1GD collects the position information of isolating switch 1G, isolating switch 2G and circuit breaker QF. When isolating switch 1G or isolating switch 2G or circuit breaker QF is in the closed position, it is judged that grounding switch 1GD is blocked. When the isolating switch 2G and the circuit breaker QF are both in the open position, it is judged that the grounding switch 1GD is unlocked;

(4) The grounding switch 2GD collects the position information of the isolating switch 3G and the circuit breaker QF. When the isolating switch 3G or the circuit breaker QF is in the closed position, it is judged that the isolating switch 3G is blocked. When the isolating switch 3G and the circuit breaker QF are both open When it is in position, it is judged that the isolation switch 3G is unlocked;

(5) The isolating switch 3G collects the position information of the circuit breaker QF, the grounding switch 2GD, the grounding switch 3GD, and the line voltage. When the circuit breaker QF or the grounding switch 2GD or the grounding switch 3GD is in the closed position or the line is under voltage, it is judged as isolation The switch 3G is blocked. When the circuit breaker QF, the grounding switch 2GD and the grounding switch 3GD are both in the off position and the line has no voltage, it is determined that the isolating switch 3G is unlocked;

(6) The grounding switch 3GD collects the position information and line voltage of the isolating switch 3G. When the isolating switch 3G is in the closing position or the line is under voltage, it is judged that the grounding switch 3GD is blocked. When the isolating switch 3G is in the opening position and the line When there is no pressure, it is judged that the grounding switch 3GD is unlocked;

(7) A busbar grounding switch 1MGD collects the position information of all disconnectors connected to a busbar. When any one of the disconnectors connected to a busbar is in the closed position, it is judged that 1MGD is blocked. When all the disconnectors connected to a busbar are in the closed position. It is judged that 1MGD is unlocked when it is in the open position;

(8) The grounding switch 2MGD of the second-section busbar collects the position information of all the disconnectors connected to the second-section busbar. When any one of the isolation switches connected to the second-section busbar is in the closed position, it is judged that the 2MGD is blocked. It is judged that the 2MGD is unlocked when the isolating switches are all in the open position.

The switch output unit is connected by the interface circuit and the logic judgment unit, and receives the result of the logic judgment. The switch output module connects the output contacts in series with the electrical operation circuit of the isolation switch. When the logic is judged to be unlocked, the open contacts are closed. The electrical operation circuit of the controlled isolating switch is turned on, at this time, the electrical operation of the isolating switch is unlocked, and the isolating switch can be operated electrically. When the logic is judged to be blocked, the open contact connected in series with the electrical operating circuit of the isolating switch opens and disconnects the electrical operating circuit. , the electrical operation of the isolating switch is blocked and cannot be operated electrically.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (9)

1. The utility model provides a transformer substation's isolator prevents electric maloperation device which characterized in that: the device comprises an interface circuit, an optical communication interface, a switching value acquisition unit, a switching value output module and a logic judgment unit, wherein the logic judgment unit is connected with the interface circuit;

the switching value acquisition unit consists of a photoelectric isolation element configuration signal processing circuit, an external isolation switch position auxiliary contact controls the light emitting and the light extinguishing of the photoelectric isolation element, acquires the digital state of the position of the isolation switch, and transmits the acquired information to the logic judgment unit for logic judgment;

the logic judgment unit transmits the information state according to the acquired switching value state, judges according to the set logic to perform logic judgment, and outputs locking and unlocking information according to the judgment result;

the electric operation loop of the controlled isolating switch is locked or unlocked through the switching value output unit, and meanwhile, the collected switching value position and the judgment result are transmitted to other devices and the graph display unit through the optical fiber communication interface.

2. The substation disconnecting switch electrical misoperation prevention device according to claim 1, wherein: the device also comprises a plurality of signal lamps and a power supply, wherein the signal lamps are connected with the interface circuit, and the power supply is connected with the interface circuit.

3. The substation disconnecting switch electrical misoperation prevention device according to claim 1, wherein: at least one of the devices is mounted within a disconnector mechanism box.

4. The substation disconnecting switch electrical misoperation prevention device according to claim 1, wherein: the optical communication interface is connected with the graphic display unit; the graphic display unit displays normal, abnormal, unlocked and locked graphic information; the optical communication interface is connected with the graphic display unit, receives the locking information, transmits the locking information to the logic judgment unit through the interface circuit, receives the locking information transmitted by the logic judgment unit through the interface circuit, and transmits the locking information through the transmitting port.

5. The substation disconnecting switch electrical misoperation prevention device according to claim 1, wherein: the switching value output unit receives the result of the logic judgment, the switching value output unit connects the output contact in series with the electrical operation loop of the isolating switch, when the logic judgment is unlocking, the open contact is closed, the controlled isolating switch electrical operation loop is conducted, the unlocking isolating switch is electrically operated at the moment, the isolating switch can be electrically operated, when the logic judgment is locking, the open contact connected in series with the isolating switch electrical operation loop opens the open electrical operation loop, and the isolating switch electrical operation is locked and cannot be electrically operated.

6. The substation disconnecting switch electrical misoperation prevention device according to claim 2, wherein: the four indicating lamps are in different colors, and the running lamp is on and the abnormal lamp is off when the running lamp is normal;

when the fault is self-detected, alarm information and an alarm contact are output, the locking amount is output to lock the isolating switch for electrical operation, and meanwhile, the operation lamp of the on-site device is turned off, the abnormal lamp is turned on, and the locking lamp is turned on;

the information quantity acquired by the switching quantity acquisition unit judges that the locking lamp is turned on and the unlocking lamp is turned off when the controlled isolating switch is in a locked state; and when the controlled isolating switch is judged to be not locked, the locking lamp is turned off, and the unlocking lamp is turned on.

7. The substation disconnecting switch electrical misoperation prevention device according to claim 1, wherein:

the device is also provided with a debugging interface, the debugging interface is connected with an interface circuit, the debugging computer is connected with the debugging interface, the debugging computer writes in the device, reads the latching logic and transfers the state of the device, the device outputs a normally closed air contact of the small-sized sealed relay, the normally closed air contact is connected in series into an electric operation loop of the isolating switch, the electric operation loop of the isolating switch is cut off when the latching contact is output, so that the electric latching at the beginning of isolation is realized, the small-sized sealed relay is controlled by a logic judgment unit, when the logic judgment is latching, the electric operation loop of the isolating switch is cut off by controlling the contact of the output relay to be opened, and when the logic judgment is unlocking, the contact of the output relay is controlled to be closed, so that the electric operation loop of the isolating switch.

8. The utility model provides a transformer substation's isolator prevents electric maloperation device which characterized in that: the device comprises a shell, wherein a processor is arranged in the shell and is connected with a debugging interface, a switching value output interface, an optical fiber communication interface, a power supply input interface and a switching value input interface; the debugging interface, the switching value output interface, the optical fiber communication interface, the power supply input interface and the switching value input interface are arranged on one side of the shell; the graphic display unit is connected with the processor; the graphic display unit displays normal, abnormal, unlocked and locked graphic information;

the debugging interface is used for debugging the state and the locking logic of the device called by a computer, the processor outputs a normally closed air contact of the small-sized sealed relay, the normally closed air contact is connected into an electric operation loop of the isolating switch in series, when the normally closed air contact is output to open and cut off the electric operation loop of the isolating switch, the electric locking at the opening end of the isolating switch is realized, the small-sized sealed relay is controlled by the logic judgment unit, when the normally closed air contact is judged to be locked, the normally closed air contact is controlled to open and cut off the electric operation loop of the isolating switch, and when the normally closed air contact is judged to be unlocked, the normally closed air contact is controlled to close and the electric operation;

the processor carries out logic judgment according to the collected switching value state and the information state transmitted by other devices, and outputs locking and unlocking information.

9. Method based on the device according to one of claims 1 to 8, characterized in that: the method comprises the following steps:

the switching value acquisition unit acquires the position state of the isolating switch; the logic judgment unit transmits the information state according to the acquired switching value state, performs logic judgment and outputs locking and unlocking information; the electric operation loop of the controlled isolating switch is locked or unlocked through the switching value output unit, and meanwhile, the acquired switching value position and the judgment result are transmitted to other local devices and the graph display unit; when the logic judgment is abnormal, the isolating switch is electrically locked, when the logic judgment is normal, whether the isolating switch is unlocked is further judged, if yes, the locking of the isolating switch is released, and if not, the isolating switch is electrically locked.

Images