CN213716786U - Device for preventing electrical misoperation of isolating switch of transformer substation - Google Patents
Device for preventing electrical misoperation of isolating switch of transformer substation Download PDFInfo
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- CN213716786U CN213716786U CN202022126594.4U CN202022126594U CN213716786U CN 213716786 U CN213716786 U CN 213716786U CN 202022126594 U CN202022126594 U CN 202022126594U CN 213716786 U CN213716786 U CN 213716786U
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Abstract
The utility model relates to a isolator of transformer substation prevents electric maloperation device, the device include interface circuit, optical communication interface, switching value acquisition unit, volume output module, logic judgement unit and interface circuit are connected. The utility model discloses the technique of networking shared information avoids the problem that isolator electrical misoperation prevention needs to rely on a large amount of control cable wiring, saves the use amount of control cables; complexity of a locking circuit is simplified, an electric control circuit of the isolating switch is simplified, and efficiency of equipment maintenance work is improved; the safety performance of the equipment is improved; the locking information of the disconnecting switch of the transformer substation is displayed graphically on the graphic display unit, and the locking and unlocking states of the disconnecting switch are displayed graphically and visually, so that the disconnecting switch is clear at a glance and the electrical locking state of the disconnecting switch is convenient to monitor.
Description
Technical Field
The utility model belongs to electric power system transformer substation electrical operation field, especially a transformer substation's isolator prevents electric maloperation device.
Background
The operation of the disconnecting switch in the transformer substation of the power system needs to be operated according to a specific logic sequence, different operation logics exist under main wiring of different transformer substations, if the operation sequence of the disconnecting switch is wrong, malignant misoperation of the disconnecting switch with a connecting point or a load break of the power system is caused, equipment is burnt out when the malignant misoperation is light, and life loss or power grid instability accidents are caused when the malignant misoperation is serious.
But the electric locking function of maloperation is prevented to electrically operated isolator equipment in the present transformer substation, is realized by the mode that control cable inserts the locking circuit, and this mode is laid control circuit by each isolator, finally links together each circuit to realize an isolator's electric locking function of preventing maloperation, use control cable wiring method problem to have:
1. the locking information cannot be shared, the locking information is transmitted by means of the control cable, the locking information cannot be shared by a plurality of devices, one locking logic is realized, a control cable needs to be laid to access the position contact of the isolating switch in a cable connection mode, a plurality of control cables need to be laid to access the position contact of the same isolating switch for multiple times to realize multiple logics;
2. the locking function is invalid due to the fact that the connection of the control cable is loosened, the secondary connection is used for achieving locking logic on a circuit, when the connection of the control cable is loosened and wrong, the isolating switch loses the electric locking function, and if the locking logic of the isolating switch is modified, the secondary connection needs to be changed, so that construction difficulty is high;
3. the locking logic needs a large number of control cable connections to realize, when the locked isolating switch is locked by a plurality of other equipment states, a large number of control cables need to be laid to realize functions, the loop becomes more complicated, and the equipment maintenance is not facilitated;
4. the locking state is not visual, the locking state display of the isolating switch is not visual, and whether the locking logic is normal can be determined only by checking the state of the isolating switch and checking the state of a locking circuit by a professional.
SUMMERY OF THE UTILITY MODEL
But in the transformer substation, electrically operated isolator's electrical prevention maloperation, the technological means who realizes the shutting function by the control cable wiring exists, and shutting information can not share, control cable wiring becomes flexible to lead to shutting function inefficacy, shutting logic need rely on a large amount of control cable wiring to realize, the not audio-visual problem of shutting state, the utility model provides a transformer substation's isolator prevents electrical maloperation device.
The utility model discloses gather isolator position state nearby at isolator to according to the shutting logic output contact shutting information of setting for, prevent the shutting function of maloperation with the electricity that realizes isolator, finally reduce isolator electric control cable's of preventing maloperation use amount, and isolator lock state is directly perceived visible, and each isolator shutting information can supply with a plurality of device shares, and it is simple more easily to let isolator shutting function change or extension.
The technical scheme of the utility model is specifically as follows:
a device for preventing electrical misoperation of a substation disconnecting switch comprises an interface circuit, an optical communication interface, a switching value acquisition unit, an output module and a logic judgment unit, wherein the interface circuit is connected with the switching value acquisition unit;
the switching value acquisition unit is composed 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, and the switching value acquisition unit 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 judges according to the acquired switching value state and the set logic 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.
Furthermore, the device for preventing the electrical misoperation of the disconnecting switch of the transformer substation further 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.
Further, at least one substation disconnecting switch prevents that electrical misoperation device is installed in the disconnecting switch mechanism box.
Further, 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.
Further, the switching value output unit receives the result of the logic judgment, and the switching value output unit connects the output contact in series with the electrical operation loop of the isolating switch.
Furthermore, the four indicating lamps are sequentially operated, abnormal, locked and unlocked, the four indicating lamps are different in color, and the operating lamp is turned on and the abnormal lamp is turned off in normal time.
Furthermore, the device for preventing the electrical misoperation of the transformer substation disconnecting switch is also provided with a debugging interface, the debugging interface is connected with an interface circuit, a debugging computer is connected with the debugging interface, the debugging computer writes and reads locking logic and the state of the debugging device into the device for preventing the electrical misoperation of the transformer substation, the device for preventing the electrical misoperation of the transformer substation outputs a normally closed type idle joint of the small-sized sealed relay, the normally closed type idle joint is connected into an electric operation loop of the disconnecting switch in series, an output locking contact opens the electric operation loop of the disconnecting switch to realize the electrical locking of the isolated switch, the small-sized sealed relay is controlled by a logic judgment unit, when the logic judgment is locking, the output relay contact is controlled to open the electric operation loop of the disconnecting switch, and when the logic judgment is unlocking, the output relay contact is controlled to be closed to unlock the electric operation loop of the disconnecting switch, possesses the function of electric operation.
Compared with the prior art, the beneficial effects of the utility model are specifically as follows:
1. the utility model discloses a through gather information on the spot, the technique of network deployment shared information, avoid the isolation switch electric to prevent the problem that the maloperation needs to rely on a large amount of control cable wiring, practiced thrift the use amount of control cable;
2. the utility model integrates complex and fussy circuits on the circuit, the peripheral interface circuit is only provided with a small amount of input and output circuits, and the other circuits are realized by communication and power supply circuits, thereby simplifying the complexity of the locking circuit, simplifying the electrical control circuit of the isolating switch and improving the efficiency of the equipment maintenance work;
3. the utility model discloses avoided because the shutting that the secondary wiring insecure caused is inefficacy, improved the security performance of equipment.
4. The utility model discloses make transformer substation's isolator's shutting information same on graphic display unit, the graphical display, isolator's shutting, the graphical visual display of unblock state, surveyability, the electric shutting state of being convenient for keep watch on isolator.
Drawings
Fig. 1 is a block diagram of the apparatus of the present invention;
FIG. 2 is a schematic diagram of the main wiring of the present invention;
FIG. 3 is a schematic diagram of the graphic display unit of the present invention for information interaction;
FIG. 4 is a flow chart of a method of the present invention;
fig. 5 is a schematic structural view of the apparatus of the present invention;
wherein, 1, the indicator light is normally operated; 2. an abnormality indicator light; 3. a locking indicator light; 4. an unlocking indicator light; 5. debugging an interface; 6. an optical fiber communication interface; 7.220V power input interface; 8. a switching value input interface; 9. a switching value output interface; 1M: 1 section of bus; 2M: 2, generating lines; 1 MGD: 1 section of bus grounding switch; 2 MGD: 2, a bus grounding switch; 1G: 1, a female side isolating switch; 2G: 2 a female side isolating switch; 1 GD: the circuit breaker is connected with a grounding switch by a bus side; 2 GD: a circuit breaker is connected with a grounding switch at the side close to the circuit; 3G: a line side isolation switch; 3 GD: a line grounding switch; QF: a circuit breaker.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments belong to the protection scope of the present invention.
Unless otherwise defined, technical or scientific terms used in the embodiments of the present application should have the ordinary meaning as understood by those having ordinary skill in the art. The use of "first," "second," and similar terms in the present embodiments does not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "Upper," "lower," "left," "right," "lateral," "vertical," and the like are used solely in relation to the orientation of the components in the figures, and these directional terms are relative terms that are used for descriptive and clarity purposes and that can vary accordingly depending on the orientation in which the components in the figures are placed.
As shown in fig. 1, the device for preventing electrical misoperation of the substation disconnecting switch in the embodiment includes an interface circuit, an optical communication interface, a switching value acquisition unit, an output value output module, and a logic determination unit, which are connected to the interface circuit.
The switch value acquisition unit is composed 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 collected switching value state, performs logic judgment and outputs locking and unlocking information.
The electrical 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 graphic display unit through the optical fiber communication interface.
The device of the embodiment collects the position switching value state of the isolating switch by adopting the photoelectric isolation technology, receives the position state, locking, unlocking and self-checking information of the isolating switch through the communication interface, and sends the position state of the isolating switch, the locking, unlocking and self-checking information of the device through the communication interface.
The output contact is connected in series with an electrical operation loop of the isolating switch, when the logical judgment is unlocking, the open contact is closed, the controlled isolating switch electrical operation loop is conducted, the isolating switch is unlocked at the moment, the isolating switch can be operated electrically, when the logical judgment is locking, the open contact connected in series with the isolating switch electrical operation loop is opened to disconnect the electrical operation loop, and the isolating switch electrical operation is locked and cannot be operated electrically. Meanwhile, the corresponding signal indicator lamps are lightened according to the logical judgment result to realize the visual visualization of the locking and unlocking states of the isolating switch, and the appearance of the device is shown in fig. 5.
As shown in fig. 5, the device for preventing electrical misoperation of the substation disconnecting switch in the present embodiment includes a housing, a processor is disposed in the housing, and the processor is connected to a debugging interface 5, a switching value output interface 9 (as a switching value output unit), an optical fiber communication interface 6 (as a communication interface unit), a 220V power input interface 7, a switching value input interface 8 (as an input value acquisition unit), and an indicator light; 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 controller; the graphic display unit displays the normal, abnormal, unlocked and locked graphic information. The pilot lamp includes normal operating pilot lamp 1, unusual pilot lamp 2, shutting pilot lamp 3, unblock pilot lamp 4, and four pilot lamps are green, yellow, red, green in proper order.
In the embodiment, a metal material is used as a shell, the circuit board is designed to integrate the units in the metal shell, and the interface circuit is adopted to connect the units, so that information exchange among all the parts is realized.
As shown in fig. 3, in the present embodiment, two of the above devices are installed in an isolating switch mechanism box, and perform information interaction with a graphic display unit through an optical fiber communication network, the optical fiber communication network is used as a communication part and is composed of an optical cable and an optical switch, the optical switch provides a device power supply through a direct current 220V, and the optical switch is connected with each local device and the graphic display unit, so as to realize data exchange between devices.
The graphic display unit is characterized in that hardware is composed of a computer with an optical fiber communication function, an appearance interface is designed on software according to a form consistent with a primary main wiring diagram of a transformer substation, meanwhile, the same communication protocol with the on-site locking unit is adopted, communication between the graphic unit and each on-site locking unit is realized, information is converted into graphic display of closing and opening of the isolating switch according to the collected position state of the isolating switch and the normal, abnormal, unlocking and locking states of each locking unit, and the normal, abnormal, unlocking and locking graphic display of each device for preventing electrical misoperation is realized.
The graphic display unit can be operated manually to send out a control command to control each locking unit to unlock and lock for output.
As shown in fig. 4, the method based on the above device of the present embodiment is performed as follows:
the switching value acquisition unit acquires the position state of the isolating switch, and the processor is used for storing and sharing data; 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.
The device is installed in isolator mechanism incasement, sets up four pilot lamps of operation (green), unusual (yellow), shutting (red), unblock (green), and when the device was normal, operation (green) was lighted, unusual (yellow) lamp is extinguished, device self-checking output when trouble reports an emergency and asks for help or increased vigilance information and report an emergency and ask for help or increased vigilance the contact, and output locking volume removes the electrical operation of shutting isolator, and device operation (green) lamp is extinguished, unusual (yellow) lamp is lighted, shutting (red) lamp is lighted simultaneously.
When the device judges that the controlled disconnecting switch is in a locked state according to the information quantity acquired by the communication port and the switching value of the device, the locking (red) lamp is turned on, and the unlocking (green) lamp is turned off; when the controlled isolating switch is judged to be not locked, the locking (red) lamp is turned off, and the unlocking (green) lamp is turned on.
The device is provided with an optical fiber communication interface for transmitting information after the device forms a network; the debugging interface is connected with the interface circuit, the debugging computer is connected with the debugging interface, and the debugging computer writes in and reads the locking logic to the device and calls the state of the device. The normally closed type air contact of the small-sized sealed relay is output and is connected into an electric operation loop of the isolating switch in series through an insulated cable of 2.5 square millimeters, the electric operation loop for cutting off the isolating switch is opened when an output locking contact, so that the electric locking of the opening end is realized, the first logic judgment unit of the small-sized sealed relay is controlled, when the logic judgment is locking, the electric operation loop for cutting off the isolating switch is opened by controlling the output relay contact, when the logic judgment is unlocking, the closing of the control output relay contact allows the electric operation loop of the isolating switch to be unlocked, and the electric operation function is achieved.
The power input is direct current 220V input, the output 3-5V direct current voltage is supplied to the logic module and the communication interface through the interface circuit to provide a working power supply, the output 12V direct current voltage is supplied to the switching value acquisition module, the switching value output module and the signal lamp output module through the interface circuit to serve as the working power supply.
The switching value acquisition unit is composed of a photoelectric isolation element configuration signal processing circuit, the external isolation switch position auxiliary contact controls the light emission of the photoelectric isolation element, the digital state of the position of the isolation switch is extinguished, and the acquired information is transmitted to the logic judgment module through the interface circuit for logic judgment.
The communication interface is realized by a receiving port and a transmitting port with optical fiber communication function and a signal conversion circuit, the locking information transmitted by other devices is transmitted to the logic judgment module through the interface circuit after being received, and meanwhile, the locking information transmitted by the logic judgment module is received through the interface circuit and is transmitted to other locking devices through the transmitting port.
The logic judgment unit is used for writing a locking judgment program formulated according to the main wiring into a single chip microcomputer with stable performance, carrying out logic judgment according to the acquired switching value state and the information state transmitted by other devices, outputting locking and unlocking information to lock or unlock an electric operation loop of the controlled isolating switch through a switching value output module, and simultaneously transmitting the acquired switching value position and the judgment result to other local devices and a graphic display unit through an optical fiber communication interface.
Fig. 2 is a schematic diagram of one of the main connections. The latching logic can be changed according to requirements, and it is prior art to write the corresponding logic into the logic judgment module, and the latching logic is formulated by using the main wiring schematic diagram 2 in this embodiment as follows:
(1) the disconnecting switch 1G acquires position information of a section of bus grounding switch 1MGD, a disconnecting switch 1GD and a breaker QF, when the section of bus grounding switch 1MGD, the disconnecting switch 1GD or the breaker QF is at a switching-on position, the disconnecting switch 1G is judged to be locked, and when the section of bus grounding switch 1MGD, the disconnecting switch 1GD and the breaker QF are at a switching-off position, the disconnecting switch 1G is judged to be unlocked;
(2) the disconnecting switch 2G acquires position information of a two-section bus grounding switch 2MGD, a disconnecting switch 1GD and a breaker QF, when the two-section bus grounding switch 2MGD, the disconnecting switch 1GD or the breaker QF is at a switching-on position, the disconnecting switch 2G is judged to be locked, and when the two-section bus grounding switch 2MGD, the disconnecting switch 1GD and the breaker QF are at a switching-off position, the disconnecting switch 2G is judged to be unlocked;
(3) the grounding switch 1GD acquires position information of the disconnecting switch 1G, the disconnecting switch 2G and the breaker QF, when the disconnecting switch 1G, the disconnecting switch 2G or the breaker QF is at a switching-on position, the grounding switch 1GD is judged to be locked, and when the disconnecting switch 1G, the disconnecting switch 2G and the breaker QF are at a switching-off position, the grounding switch 1GD is judged to be unlocked;
(4) the grounding switch 2GD acquires position information of the disconnecting switch 3G and the breaker QF, the disconnecting switch 3G is judged to be locked when the disconnecting switch 3G or the breaker QF is at a switching-on position, and the disconnecting switch 3G is judged to be unlocked when the disconnecting switch 3G and the breaker QF are at a switching-off position;
(5) the disconnecting switch 3G acquires position information of the circuit breaker QF, the grounding switch 2GD and the grounding switch 3GD and line voltage, when the circuit breaker QF or the grounding switch 2GD or the grounding switch 3GD is in a switching-on position or the line is in voltage, the disconnecting switch 3G is judged to be locked, and when the circuit breaker QF, the grounding switch 2GD and the grounding switch 3GD are in a switching-off position and the line is not in voltage, the disconnecting switch 3G is judged to be unlocked;
(6) the grounding switch 3GD acquires position information of the disconnecting switch 3G and line voltage, when the disconnecting switch 3G is at a switching-on position or the line is under voltage, the grounding switch 3GD is judged to be locked, and when the disconnecting switch 3G is at a switching-off position and the line is not under voltage, the grounding switch 3GD is judged to be unlocked;
(7) the method comprises the following steps that a section of bus grounding switch 1MGD collects position information of all disconnecting switches connected to a section of bus, when any one disconnecting switch connected to the section of bus is in a switching-on position, the 1MGD is judged to be locked, and when all disconnecting switches connected to the section of bus are in a switching-off position, the 1MGD is judged to be unlocked;
(8) the two-section bus grounding switch 2MGD collects position information of all disconnecting switches connected to the two-section bus, when any one of the disconnecting switches connected to the two-section bus is in a switching-on position, the 2MGD is judged to be locked, and when all the disconnecting switches connected to the two-section bus are in a switching-off position, the 2MGD is judged to be unlocked.
The switching value output unit is connected with the logic judgment unit through the interface circuit, receives a logic judgment result, the switching value output module connects an output contact in series with an 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, 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.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
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 is composed 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, and the switching value acquisition unit 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 judges according to the acquired switching value state and the set logic and outputs locking and unlocking information according to the judgment result;
the electrical 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 graphic display unit through the optical fiber communication interface.
2. The substation disconnecting switch electrical misoperation prevention device according to claim 1, wherein: the device for preventing the electrical misoperation of the disconnecting switch of the transformer substation further 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 substation disconnecting switch prevents that electric maloperation device from installing in isolator mechanism case.
4. The substation disconnecting switch electrical misoperation prevention device according to claim 1, wherein: 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: and the switching value output unit receives the result of the logic judgment, and the switching value output unit connects the output contact in series with the electrical operation loop of the isolating switch.
6. The substation disconnecting switch electrical misoperation prevention device according to claim 2, wherein: the four indicating lamps are sequentially operated, abnormal, locked and unlocked, are different in color, and are turned on when the lamp is in normal state and turned off when the lamp is in abnormal state.
7. The substation disconnecting switch electrical misoperation prevention device according to claim 1, wherein:
the device for preventing the electrical misoperation of the disconnecting switch of the transformer substation is also provided with a debugging interface, the debugging interface is connected with an interface circuit, and a debugging computer is connected with the debugging interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022126594.4U CN213716786U (en) | 2020-09-24 | 2020-09-24 | Device for preventing electrical misoperation of isolating switch of transformer substation |
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| CN202022126594.4U CN213716786U (en) | 2020-09-24 | 2020-09-24 | Device for preventing electrical misoperation of isolating switch of transformer substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151300A (en) * | 2020-09-24 | 2020-12-29 | 云南电网有限责任公司昆明供电局 | Device and method for preventing electrical misoperation of substation disconnecting switch |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151300A (en) * | 2020-09-24 | 2020-12-29 | 云南电网有限责任公司昆明供电局 | Device and method for preventing electrical misoperation of substation disconnecting switch |
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