CN111917185B - Switch operation monitoring system of direct current system of transformer substation - Google Patents
Switch operation monitoring system of direct current system of transformer substation Download PDFInfo
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- CN111917185B CN111917185B CN202010733585.3A CN202010733585A CN111917185B CN 111917185 B CN111917185 B CN 111917185B CN 202010733585 A CN202010733585 A CN 202010733585A CN 111917185 B CN111917185 B CN 111917185B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2213/00—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Human Computer Interaction (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model relates to the technical field of a direct current system of a transformer substation and discloses a switch operation indicating device of the direct current system of the transformer substation. The monitoring system is characterized in that the common positive terminal, the on-signal terminal and the switch of the measurement and control screen are connected in series, the running condition of the switch is obtained through whether current exists in the circuit, and the running condition is transmitted to the background monitoring machine for monitoring and recording. The switch for the direct current system of the transformer substation is simple to operate and convenient to connect with the indicating device and the monitoring system.
Description
Technical Field
The utility model relates to the technical field of transformer substation direct current systems, in particular to a transformer substation direct current system switch operation monitoring system.
Background
The direct current system of the transformer substation supplies power for the control system, relay protection, signal devices and automatic devices in the transformer substation, can still keep the power supply under the accident condition, can also supply loads such as accident illumination, inverter power supply and the like, and has an irreplaceable function for the safe and stable operation of the transformer substation. At present, a direct current system of a transformer substation is commonly used as a two-electricity two-charge wiring mode, as shown in fig. 1. The two-electricity two-charging connection mode is that two sets of charging devices are configured by two sets of storage batteries, each set of storage batteries and the charging devices thereof are respectively connected with corresponding bus sections, and the direct current power supply system of the two sets of storage batteries should meet the requirement of uninterrupted power supply when the two sections of buses are switched in normal operation.
Referring to fig. 1, under normal operation, the #1 battery is charged in a floating manner on the 1M bus, the #1 charger is charged in a floating manner on the 1M bus, the #2 battery is charged in a floating manner on the 2M bus, and the #2 charger is charged in a floating manner on the 1M bus. A first switch S11 is arranged between the #1 group of storage batteries and the 1M bus, a second switch S21 is arranged between the #1 group of charging machines and the 1M bus, a first switch S12 is arranged between the #2 group of storage batteries and the 2M bus, and a second switch S22 is arranged between the #2 group of charging machines and the 2M bus, so that under the normal running state, the S11, the S21, the S12 and the S22 are all in a combined state. When the storage battery and the charger are overhauled, the switch is required to be disconnected, so that the switch is switched to a split state.
At present, a switch of a direct current system has no switch position display mark, whether the switch is switched in place or not can be judged only by the personal experience of operation and maintenance personnel, and when the switch is not closed in time during maintenance of a storage battery and a charger, a bus is not supplied with power. And the switch also has faults, even if the switch is switched to the on-state, the circuit cannot be connected, and the voltage loss of the direct current system can be caused. Considering the more serious condition, switching to the operation of the storage battery and the charger of the #2 group during the power failure maintenance of the storage battery and the charger of the #1 group, and if the charging machine of the #2 group or the station transformer system for supplying power fails, the missing of the charging battery of the #2 group on the direct current bus may cause the voltage loss of the total station secondary system. Therefore, the switch of the direct current system needs to be monitored so as to be switched to a proper state in time to ensure the normal operation of the direct current system.
The utility model patent CN207134864U discloses a novel transformer substation direct current system switch, which comprises a direct current screen, a voltage monitor, a load module, a system switch and a storage battery pack, wherein the direct current screen is electrically connected with the load module through the voltage monitor, the voltage monitor is arranged between the direct current screen and the load module, the positive electrode of the direct current screen is electrically connected with the positive electrode of the storage battery pack through one end of the system switch, the negative electrode of the storage battery pack is connected with the load module through the other end of the system switch, and the direct current screen comprises a mating electric unit, a charging module unit, a step-down silicon chain unit and a direct current feed unit. The patent is used for monitoring whether the output of the direct current system is abnormal or not, and cannot monitor the closing condition of a switch in the direct current system.
Disclosure of Invention
The utility model aims to provide a transformer substation direct current system switch operation monitoring system which monitors the operation state of a switch so as to discover problems in time and prevent misoperation.
In order to achieve the above purpose, the utility model provides a switch operation monitoring system of a transformer substation direct current system, which comprises a direct current system, wherein the direct current system comprises a storage battery, a charger and a bus, the storage battery is electrically connected with the bus in series through a first switch, the charger is electrically connected with the bus in series through a second switch, the transformer substation direct current system further comprises an indication power supply, a first indication lamp, a second indication lamp and a measurement and control screen, the first indication lamp is connected with the first switch and the second switch in series to form a first indication branch, the first switch is electrically connected with the second switch in parallel and then is connected with the second indication lamp in series to form a second indication branch, and the first indication branch and the second indication branch are respectively connected with the indication power supply; the measurement and control screen comprises a public positive terminal and an opening signal terminal, wherein the public positive terminal, the first switch and the opening signal terminal are sequentially and electrically connected in series, and the public positive terminal, the second switch and the opening signal terminal are sequentially and electrically connected in series;
the structure of the first switch is the same as that of the second switch, the first switch comprises a switch body (1) and a handle (2), a rotating hole (101) is formed in the switch body (1), the handle (2) is connected with a rotating shaft (3), the rotating shaft (3) is rotatably sleeved in the rotating hole (101), a closing position fixed contact (4) and a dividing position fixed contact (5) are arranged on the switch body (1), a moving contact (6) is arranged on the handle (2), the closing position fixed contact (4) and the dividing position fixed contact (5) are located on the circumference taking the rotating shaft (3) as a circle center, the moving contact (6) is arranged on the outer wall of the rotating shaft (3), the closing position fixed contact (4) and the dividing position fixed contact (5) are arranged on the inner wall of the rotating hole (101), and the closing position fixed contact (4), the dividing position fixed contact (5) and the moving contact (6) are located on the same plane perpendicular to the rotating shaft (3).
The closing position fixed contact (4) of the first switch is a first closing position contact, and the dividing position fixed contact (5) is a first dividing position contact; the closing position fixed contact (4) of the second switch is a second closing position contact, and the dividing position fixed contact (5) is a second dividing position contact; the first combining contact, the first dividing contact, the second combining contact and the second dividing contact are respectively and electrically connected with the public positive terminal and the switching signal terminal in series.
Preferably, the indication power supply adopts the bus.
As a preferred scheme, the direct current system further comprises a measurement and control screen, the measurement and control screen comprises a public positive electrode end and an opening signal end, the public positive electrode end, the first indication branch and the opening signal end are sequentially connected in series and electrically connected, and the public positive electrode end, the second indication branch and the opening signal end are sequentially connected in series and electrically connected.
As a preferable scheme, the bottom surface of the switch body is provided with guide grooves communicated with the rotating holes, the number of the guide grooves is equal to the sum of the number of the combined fixed contacts and the number of the separated fixed contacts, and the combined fixed contacts and the separated fixed contacts are respectively arranged at different communication positions of the guide grooves and the rotating holes.
Preferably, an insulator is arranged between the adjacent guide grooves.
As a preferred scheme, the combined position fixed contact, the split position fixed contact and the moving contact are respectively arranged in a plurality, the number of the combined position fixed contact, the number of the split position fixed contact and the number of the moving contact are equal, the combined position fixed contact and the split position fixed contact are uniformly arranged around the rotating shaft at intervals in the circumferential direction, and the combined position fixed contact and the split position fixed contact are alternately distributed; the plurality of moving contacts are uniformly distributed circumferentially on the rotating shaft at intervals, and the included angle between the circular radiuses of the two adjacent moving contacts is the same as the included angle between the circular radiuses of the two adjacent combined static contacts.
Preferably, the rotating shaft comprises a shaft housing and an axle center body, the shaft housing is connected with the handle, the shaft housing can be sleeved outside the axle center body in a rotating way around the axle center body, the axle center body is internally tangent to the shaft housing, and the section of the axle center body is a polygon with the number of edges equal to the sum of the number of the combined static contacts and the number of the separated static contacts.
Compared with the prior art, the operation indicating device, the monitoring system and the switch of the direct current system of the transformer substation have the beneficial effects that:
(1) According to the indicating device, the first switch, the second switch and the first indicating lamp are connected in series, the first switch and the second switch are connected in parallel and then connected in series with the second indicating lamp, when the first switch and the second switch are not closed in place, the first indicating lamp and the second indicating lamp are not on, when one of the first switch and the second switch is not closed in place and the other is closed in place, the first indicating lamp is turned off, the second indicating lamp is on, so that the closing condition of the first switch and the second switch can be indicated, and when the first switch or the second switch is closed, the closing condition of the other switch can be observed at the same time, repeated inspection can be performed, problems can be found timely, and misoperation can be prevented.
(2) The monitoring system of the utility model connects the first switch and the second switch in series with the public positive terminal and the open signal terminal of the measurement and control screen of the direct current system respectively, when the switch is closed in place, current flows, when the switch is not closed in place or fails, no current flows, thus judging the running condition of the switch, and the running condition is sent to the monitoring background machine through the measurement and control screen for real-time monitoring and recording.
(3) The switch of the utility model connects the handle on the switch body through the rotating shaft, when the moving contact is contacted with the closing position fixed contact, the switch is in the closing position state, when the moving contact is contacted with the dividing position fixed contact, the switch is in the dividing position state, when the switch is installed, the wire is connected to the closing position fixed contact and the dividing position fixed contact, the indicating device and the monitoring system are convenient to connect, and when the switch is used, the closing position and the dividing position can be realized only by rotating the handle, and the operation is simple.
Drawings
Fig. 1 is a main wiring diagram of a dc system according to an embodiment of the present utility model.
Fig. 2 is a circuit diagram of the #1 group switch operation indicating device according to the embodiment of the present utility model.
Fig. 3 is a circuit diagram of the #2 group switch operation indicating device according to the embodiment of the present utility model.
Fig. 4 is a circuit diagram of a switch operation monitoring system according to an embodiment of the present utility model.
Fig. 5 is a schematic structural diagram of a switch according to an embodiment of the present utility model.
Fig. 6 is a schematic diagram of a switch in a closed state according to an embodiment of the utility model.
Fig. 7 is a schematic diagram of a split state of a switch according to an embodiment of the present utility model.
In the figure, 1-a switch body; 101-rotating the hole; 102-a first location identification; 103-second location identification; 104-a guide slot; 2-a handle; 201-indication of an identity; 3-rotating shaft; 301-a shaft housing; 302-an axle body; 4-combining static contacts; 5-dividing a static contact; 6-a moving contact; 7-an insulator; 8-conducting wires.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
Referring to fig. 1 to 3, a switch operation monitoring system of a transformer substation direct current system according to a preferred embodiment of the present utility model includes a direct current system, the direct current system includes a storage battery, a charger and a bus, the storage battery is electrically connected in series with the bus through a first switch, the charger is electrically connected in series with the bus through a second switch, the indicating device includes an indicating power supply, a first indicator light L1 and a second indicator light L2, the first indicator light L1 is connected in series with the first switch and the second switch to form a first indicating branch, the first switch is electrically connected in parallel with the second switch and then is connected in series with the second indicator light L2 to form a second indicating branch, and the first indicating branch and the second indicating branch are respectively connected with the indicating power supply. According to the indicating device, the first switch, the second switch and the first indicating lamp L1 are connected in series, the first switch and the second switch are connected in parallel and then connected in series with the second indicating lamp L2, when the first switch and the second switch are not closed in place, the first indicating lamp L1 and the second indicating lamp L2 are not lightened, when one of the first switch and the second switch is not closed in place and the other is closed in place, the first indicating lamp L1 is not lightened, the second indicating lamp L2 is lightened, so that the closing condition of the first switch and the second switch can be indicated, and when the first switch or the second switch is closed, the closing condition of the other switch can be observed at the same time, the repeated inspection can be performed, the problem can be found timely, and the error or missing operation is prevented. If an indicator light is respectively connected with the first switch or the second switch in parallel to indicate the closing condition of the first switch and the second switch, the condition of the current switch can only be observed, the condition of the other switch can not be known, the condition of the other switch can be obtained through the on-off condition of the first indicator light L1 and the second indicator light L2 when the indicator device of the embodiment can operate one switch, and meanwhile, whether the operated switch fails can be known, so that operation and maintenance personnel can check, the condition that the operation and maintenance personnel cannot operate or cannot be in place is avoided, and the condition that a storage battery or a charger cannot be thrown on a bus is avoided. In this embodiment, a group of the above-mentioned indicating devices are respectively disposed at the storage battery and the charger, or two first indicator lamps L1 may be connected in series on the first branch, two second indicator lamps L2 may be connected in series on the first branch, and the storage battery and the charger may be disposed at the two first indicator lamps L1 and the second indicator lamps L2.
Optionally, the indication power supply adopts a bus, namely a first switch, a second switch and a bus of the direct current system are connected in series with a first indication lamp L1, the second switch is connected in parallel with the first switch and then connected with a second indication lamp L2 in series with the bus of the direct current system, and the bus of the direct current system outputs electric energy to supply power for the outside. It should be noted that, the indication power supply can also adopt an external power supply, and when the direct current system loses voltage and is powered off, the external indication power supply can still supply power for the first indication lamp L1 and the second indication lamp L2, so as to judge whether the direct current system loses voltage caused by the problem of the first switch and the second switch.
Referring to fig. 1, the direct current system of the present embodiment adopts a two-to-two charging connection mode, a first switch S11 is disposed between the #1 battery and the 1M bus, a second switch S21 is disposed between the #1 battery and the 1M bus, a first switch S12 is disposed between the #2 battery and the 2M bus, and a second switch S22 is disposed between the #2 battery and the 2M bus. Referring to fig. 2, in the #1 group, a first switch S11, a second switch S21 and a first indicator lamp L11 are connected in series and then connected to a 1M bus, and a second switch S21 and the first switch S11 are connected in parallel and then connected in series and then connected to a second indicator lamp L2 and then connected to the 1M bus; referring to fig. 3, in the #2 group, the first switch S12 and the second switch S22 are connected in series with a first indicator light L1 and then connected to a 2M bus, and the second switch S22 is connected in parallel with the first switch S12 and then connected in series with a second indicator light L2 and then connected to the 2M bus. In this embodiment, the second indication branch is further connected in series with an overhaul state pressing plate LP, so that the indication circuit can be overhauled without affecting information interaction of other devices.
Further, the direct current system further comprises a measurement and control screen, the measurement and control screen comprises a public positive terminal and an opening signal terminal, the public positive terminal, the first indication branch and the opening signal terminal are sequentially connected in series and electrically connected, the public positive terminal, the second indication branch and the opening signal terminal are sequentially connected in series and electrically connected, and the operation conditions of the first switch and the second switch can be transmitted to a monitoring background machine through the measurement and control screen for monitoring and recording. The monitoring background machine can obtain the problem that the fault cause is that the storage battery and the charging machine are closed or the switch is closed according to the received running conditions of the storage battery and the charging machine and the running conditions of the first switch and the second switch, when the storage battery and the charging machine normally run, the first indicator lamp L1 and the second indicator lamp L2 are not on or the first indicator lamp L1 is not on, the second indicator lamp L2 is on, the second switch is closed in time, so that the storage battery is ensured to be thrown onto a bus, and the secondary voltage loss of a direct current system caused by the fact that the storage battery is missed to be thrown onto the bus when a station transformer system for charging and supplying power fails is avoided.
Referring to fig. 4, the embodiment further provides a switch operation monitoring system of a substation direct current system, which comprises a direct current system, wherein the direct current system comprises a storage battery, a charger and a bus, the storage battery is electrically connected with the bus in series through a first switch, and the charger is electrically connected with the bus in series through a second switch. The direct current system further comprises a measurement and control screen, the measurement and control screen comprises a public positive terminal and an opening signal terminal, the public positive terminal, the first switch and the opening signal terminal are sequentially connected in series and electrically connected, the public positive terminal, the second switch and the opening signal terminal are sequentially connected in series and electrically connected, the public positive terminal of the measurement and control screen provides power, if the first switch and the second switch are closed, the opening signal terminal of the measurement and control screen receives current signals, otherwise, no current signals are generated, so that the operation conditions of the first switch and the second switch can be judged, the measurement and control screen is used for collecting signals of all devices and transmitting the signals to a monitoring background machine, and therefore the operation conditions of the first switch and the second switch can be transmitted to the monitoring background machine for monitoring and recording.
As described above, the present embodiment adopts the "two-electric two-charge" wiring method. Therefore, in the #1 group, the common positive terminal, the first switch S11, and the on signal terminal are electrically connected in series in order, and the common positive terminal, the second switch S21, and the on signal terminal are electrically connected in series in order; in the #2 group, the public positive terminal, the first switch S12 and the open-in signal terminal are sequentially and electrically connected in series, the public positive terminal, the second switch S22 and the open-in signal terminal are sequentially and electrically connected in series, and a measurement and control circuit is independently arranged for each first switch or each second switch, so that the condition of each switch is timely obtained, and interference is avoided.
Further, referring to fig. 4, the first switch of the present embodiment includes a first combining contact and a first dividing contact, the second switch includes a second combining contact and a second dividing contact, the first combining contact, the first dividing contact, the second combining contact and the second dividing contact are respectively connected with the common positive terminal and the open signal terminal in series and electrically, and the combining contact and the dividing contact are respectively connected with a monitoring circuit, so that the situation that the first switch and the second switch are not in place can be monitored and judged. When the monitoring circuit of the closing contact has a current signal, the closing is indicated to be in place, when the monitoring circuit of the dividing contact has a current signal, the opening is indicated to be in place, and when the monitoring circuit of the closing contact and the monitoring circuit of the dividing contact have no current signal, the operation is indicated to be not in place. The combined contact of the embodiment consists of a combined static contact and a moving contact, wherein the common positive terminal is connected with the combined static contact through a wire, and then the moving contact is connected with an open signal terminal through the wire; the split contact consists of a split fixed contact and a moving contact, wherein the common positive terminal is connected with the split fixed contact through a wire, and then the moving contact is connected with the signal input terminal through a wire. When the moving contact is communicated with the combined static contact, the moving contact is in a combined state, and when the moving contact is communicated with the separated static contact, the moving contact is in a separated state.
Referring to fig. 5 to 7, the present embodiment further provides a switch for a dc system of a transformer substation, including a switch body 1 and a handle 2, wherein a rotation hole 101 is provided on the switch body 1, the handle 2 is connected with a rotation shaft 3, the rotation shaft 3 is rotatably sleeved in the rotation hole 101, a closing position fixed contact 4 and a dividing position fixed contact 5 are provided on the switch body 1, a moving contact 6 is provided on the handle, the closing position fixed contact 4 and the dividing position fixed contact 5 are located on a circumference taking the rotation shaft 3 as a center, the moving contact 6 is provided on an outer wall of the rotation shaft 3, the closing position fixed contact 4 and the dividing position fixed contact 5 are provided on an inner wall of the rotation hole 101, and the closing position fixed contact 4, the dividing position fixed contact 5 and the moving contact 6 are located on the same plane perpendicular to the rotation shaft 3. The handle 2 of this embodiment drives axis of rotation 3 and rotates, can make moving contact 6 and close position static contact 4 or divide position static contact 5 contact, realizes the switch's closure and disconnection, and the switch of this embodiment only need to be connected the wire on closing position static contact 4 and dividing position static contact 5 when the installation, makes things convenient for the circuit connection of switch operation indicating device and monitored control system, only need rotate handle 2 when using can realize closing position and dividing position, easy operation. The switch of this embodiment has offered the sign, is equipped with ON the handle 2 and instructs sign 201, is equipped with first position sign 102 and second position sign 103 ON the switch body 1, and first position sign 102 is located the rotation radius line of the axis of rotation 3 that closes position static contact 4 place, and is represented by "ON", and second position sign 103 is located the rotation radius line of axis of rotation 3 that divides position static contact 5 place, and is represented by "OFF", can instruct the direction of rotation and the rotation volume of handle 2, convenient operation. When the indication mark 201 is aligned with the first position mark 102, the indication mark is in a combined state; when the indication identifier 201 is aligned with the second position identifier 103, it is in a split state.
The bottom surface of the switch body 1 of this embodiment is equipped with the guide slot 104 that communicates with the rotation hole 101, the quantity of guide slot 104 equals with the sum of the quantity of closing position static contact 4 and dividing position static contact 5, closing position static contact 4 and dividing position static contact 5 set up respectively in the intercommunication department of different guide slots 104 and rotation hole 101, guide slot 104 can make things convenient for wire 8 that other components and parts are connected with closing position static contact 4 or dividing position static contact 5 through guide slot 104, provide the place for wire 8 and put the position, play the locate function, facilitate connection, and guide slot 104 runs through the bottom surface of switch body 1, can observe when wire 8 is connected with closing position static contact 4 or dividing position static contact 5, avoid the contact failure.
Further, an insulator 7 is arranged between the adjacent guide grooves 104, so that an isolation effect is achieved, and interference is avoided.
Further, the number of the closing position fixed contacts 4, the number of the dividing position fixed contacts 5 and the number of the moving contacts 6 of the switch are respectively multiple, the number of the closing position fixed contacts 4, the number of the dividing position fixed contacts 5 and the number of the moving contacts 6 are equal, the multiple closing position fixed contacts 4 and the multiple dividing position fixed contacts 5 are uniformly arranged at intervals around the rotating shaft 3 in the circumferential direction, and the closing position fixed contacts 4 and the dividing position fixed contacts 5 are alternately distributed; the plurality of moving contacts 6 are uniformly distributed circumferentially on the rotating shaft 3 at intervals, and the included angle between the circular radiuses of the two adjacent moving contacts 6 is the same as the included angle between the circular radiuses of the two adjacent combined static contacts 4. The storage battery or the charger of the direct current system is connected with one of the combined position fixed contacts 4, the bus is connected with one of the split position fixed contacts 5, the rest of the combined position fixed contacts 4 and the split position fixed contacts 5 are used for connecting the indicating device and a circuit of the monitoring system, the trouble and the complexity of the connecting position can be avoided, the switch operation is influenced, the handle 2 only needs to rotate once to enable one moving contact 6 to contact one combined position fixed contact 4 or the split position fixed contact 5, and the rest of the moving contacts 6 can be driven to contact the rest of the combined position fixed contacts 4 or the split position fixed contacts 5 and are identical in state.
Optionally, the rotating shaft 3 includes a shaft housing 301 and an axis body 302, the shaft housing 301 is connected with the handle 2, the shaft housing 301 is rotatably sleeved outside the axis body 302 around the axis body 302, the axis body 302 is internally tangent to the shaft housing 301, the section of the axis body 302 is a polygon with the number of sides equal to the sum of the number of the combined fixed contacts 4 and the number of the separated fixed contacts 5, so that when the rotating handle 2 drives the shaft housing 301 to rotate around the axis body 302, certain resistance is provided, the use experience is improved, and the section of the axis body 302 is a polygon with the number of sides equal to the sum of the number of the combined fixed contacts 4 and the number of the separated fixed contacts 5, a certain prompting function is provided, and the rotating amount can be limited. In this embodiment, a plurality of limiting grooves are uniformly arranged along the circumferential interval on the inner wall of the shaft housing 301, the number of the limiting grooves is equal to that of the combined static contacts 4, the limiting grooves extend along the direction parallel to the axial direction of the shaft housing 301, and when the limiting grooves rotate to the angle of the cross section polygon with the shaft core 302, the resistance is suddenly reduced, and the rotating is in place, so that the use experience is further improved.
In summary, the embodiment of the utility model provides a switch operation indicating device of a direct current system of a transformer substation, which is characterized in that a first switch, a second switch and a first indicator lamp L1 are connected in series, the first switch and the second switch are connected in parallel and then connected in series with a second indicator lamp L2, when the first switch and the second switch are not closed in place, the first indicator lamp L1 and the second indicator lamp L2 are extinguished, when one of the first switch and the second switch is not closed in place and the other is closed in place, the first indicator lamp L1 is extinguished, the second indicator lamp L2 is on, so that the closing condition of the first switch and the second switch can be indicated, and when the first switch or the second switch is closed, the closing condition of the other switch can be observed at the same time, the problem can be found out in time, and misoperation is prevented. The embodiment of the utility model also provides a transformer substation direct current system switch operation monitoring system, wherein the first switch and the second switch are respectively connected with the public positive end and the open signal end of the measurement and control screen of the direct current system in series, when the switch is closed in place, current flows, and when the switch is not closed in place or fails, no current flows, so that the operation condition of the switch is judged, and the switch is sent to a monitoring background machine through the measurement and control screen for real-time monitoring and recording. In addition, the embodiment of the utility model provides the switch for the direct current system of the transformer substation, the handle 2 is connected to the switch body 1 through the rotating shaft 3, when the moving contact 6 is in contact with the closing fixed contact 4, the switch is in a closing state, when the moving contact 6 is in contact with the dividing fixed contact 5, the switch is in a dividing state, when the switch is installed, a lead is connected to the closing fixed contact 4 and the dividing fixed contact 5, the switch operation indicating device and the monitoring system are conveniently connected, when the switch is used, the closing and dividing can be realized only by rotating the handle 2, and the operation is simple.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (7)
1. The switch operation monitoring system of the direct current system of the transformer substation comprises a direct current system, wherein the direct current system comprises a storage battery, a charger and a bus, the storage battery is electrically connected with the bus in series through a first switch, and the charger is electrically connected with the bus in series through a second switch, and the switch operation monitoring system is characterized by further comprising an indication power supply, a first indication lamp (L1), a second indication lamp (L2) and a measurement and control screen, wherein the first indication lamp (L1) is electrically connected with the first switch and the second switch in series to form a first indication branch, the first switch is electrically connected with the second switch in parallel and then is electrically connected with the second indication lamp (L2) in series to form a second indication branch, and the first indication branch and the second indication branch are respectively connected with the indication power supply;
the measurement and control screen comprises a public positive terminal and an opening signal terminal, wherein the public positive terminal, the first switch and the opening signal terminal are sequentially and electrically connected in series, and the public positive terminal, the second switch and the opening signal terminal are sequentially and electrically connected in series;
the structure of the first switch is the same as that of the second switch, the first switch comprises a switch body (1) and a handle (2), a rotating hole (101) is formed in the switch body (1), the handle (2) is connected with a rotating shaft (3), the rotating shaft (3) is rotatably sleeved in the rotating hole (101), a closing position fixed contact (4) and a dividing position fixed contact (5) are arranged on the switch body (1), a moving contact (6) is arranged on the handle (2), the closing position fixed contact (4) and the dividing position fixed contact (5) are located on the circumference taking the rotating shaft (3) as a circle center, the moving contact (6) is arranged on the outer wall of the rotating shaft (3), the closing position fixed contact (4) and the dividing position fixed contact (5) are arranged on the inner wall of the rotating hole (101), and the closing position fixed contact (4), the dividing position fixed contact (5) and the moving contact (6) are located on the same plane perpendicular to the rotating shaft (3).
The closing position fixed contact (4) of the first switch is a first closing position contact, and the dividing position fixed contact (5) is a first dividing position contact; the closing position fixed contact (4) of the second switch is a second closing position contact, and the dividing position fixed contact (5) is a second dividing position contact; the first combining contact, the first dividing contact, the second combining contact and the second dividing contact are respectively and electrically connected with the public positive terminal and the switching signal terminal in series.
2. The substation direct current system switch operation monitoring system of claim 1, wherein the indicating power source employs the bus.
3. The substation direct current system switch operation monitoring system according to claim 1, wherein the direct current system further comprises a measurement and control screen, the measurement and control screen comprises a public positive terminal and an opening signal terminal, the public positive terminal, the first indication branch and the opening signal terminal are sequentially and electrically connected in series, and the public positive terminal, the second indication branch and the opening signal terminal are sequentially and electrically connected in series.
4. The transformer substation direct current system switch operation monitoring system according to claim 1, wherein guide grooves (104) communicated with the rotating holes (101) are formed in the bottom surface of the switch body (1), the number of the guide grooves (104) is equal to the sum of the number of the combined position fixed contacts (4) and the number of the separated position fixed contacts (5), and the combined position fixed contacts (4) and the separated position fixed contacts (5) are respectively arranged at different communication positions of the guide grooves (104) and the rotating holes (101).
5. The transformer substation direct current system switch operation monitoring system according to claim 4, characterized in that an insulator (7) is arranged between adjacent guide slots (104).
6. The transformer substation direct current system switch operation monitoring system according to claim 1, wherein the number of the combination static contacts (4), the number of the split static contacts (5) and the number of the moving contacts (6) are respectively equal, the combination static contacts (4), the number of the split static contacts (5) and the number of the moving contacts (6) are respectively arranged in a plurality, the combination static contacts (4) and the split static contacts (5) are uniformly arranged around the rotating shaft (3) at intervals in the circumferential direction, and the combination static contacts (4) and the split static contacts (5) are alternately distributed; the moving contacts (6) are uniformly distributed circumferentially on the rotating shaft (3) at intervals, and the included angle between the circular radiuses of two adjacent moving contacts (6) is the same as the included angle between the circular radiuses of two adjacent combined static contacts (4).
7. The transformer substation direct current system switch operation monitoring system according to claim 6, wherein the rotating shaft (3) comprises a shaft housing (301) and an axle center body (302), the shaft housing (301) is connected with the handle (2), the shaft housing (301) can be rotatably sleeved outside the axle center body (302) around the axle center body (302), the axle center body (302) is internally tangent to the shaft housing (301), and the section of the axle center body (302) is a polygon with the number of edges being equal to the sum of the number of the combined static contacts (4) and the number of the separated static contacts (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010733585.3A CN111917185B (en) | 2020-07-27 | 2020-07-27 | Switch operation monitoring system of direct current system of transformer substation |
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| CN202010733585.3A CN111917185B (en) | 2020-07-27 | 2020-07-27 | Switch operation monitoring system of direct current system of transformer substation |
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| CN111917185A CN111917185A (en) | 2020-11-10 |
| CN111917185B true CN111917185B (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114352971A (en) * | 2021-11-25 | 2022-04-15 | 深圳供电局有限公司 | Direct current screen assembly and indicator lamp thereof |
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