CN115332014A - Railway traction power supply circuit and transformer control device - Google Patents
Railway traction power supply circuit and transformer control device Download PDFInfo
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- CN115332014A CN115332014A CN202210922520.2A CN202210922520A CN115332014A CN 115332014 A CN115332014 A CN 115332014A CN 202210922520 A CN202210922520 A CN 202210922520A CN 115332014 A CN115332014 A CN 115332014A
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- time relay
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/18—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for introducing delay in the operation of the relay
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
- H01H50/041—Details concerning assembly of relays
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
Abstract
The invention relates to a railway traction power supply circuit and a transformer control device, wherein the circuit comprises a transformer, a load, a protection pressure plate, a transformer closing switch, a time delay closing device and a no-voltage release; the transformer, the load, the protection pressing plate and the transformer closing switch are sequentially connected in series; the time-delay switching-on device and the voltage-loss tripper are respectively connected with the transformer switching-on switch in parallel; and the voltage-loss tripper is used for controlling the voltage-loss disconnection of the transformer closing switch. According to the technical scheme, the time delay switching-on device is arranged, and the switching-on device can be in conduction connection when the voltage stability time delay of the transformer is detected, so that the transformer provides voltage for a load through the time delay switching-on device, the working efficiency is improved, the electric energy loss is reduced, the power transmission time is shortened, and the power utilization of a user is facilitated.
Description
Technical Field
The disclosure relates to the technical field of transformers, in particular to a railway traction power supply circuit and a transformer control device.
Background
In order to perform undervoltage and zero-voltage protection on a distribution transformer, a no-voltage release is usually provided in a high-voltage main switch of the distribution transformer, but an existing distribution transformer does not have an automatic closing function. Therefore, when the distribution transformer is in a backward switching operation mode, and a corresponding feed cabinet or a power line of a distribution station trips, namely, after the high-voltage main switch is tripped due to faults or voltage fluctuation, the high-voltage main switch cannot be automatically switched on when power is recovered. Therefore, after the incoming call is recovered, operation and maintenance personnel are required to be arranged in the power supply workshop to go to the substation to perform manual switching-on power transmission. This may cause a problem that the power-off time is prolonged and the failure handling efficiency is low. And the normal operation of corresponding electric equipment such as an air conditioner, an elevator and the like is adversely affected, and meanwhile, much inconvenience is brought to operation and maintenance, so that the labor cost and the mechanical cost are greatly increased.
Meanwhile, the distribution transformer does not have an automatic switching-on function, so that operation and maintenance personnel must manually restore power transmission on site when the problems of error tripping and the like exist. The work efficiency is reduced, a large amount of electric energy loss is caused, the power transmission time is delayed, and a great deal of inconvenience is brought to power utilization of users.
Disclosure of Invention
In order to solve the technical problem, the present disclosure provides a railway traction power supply circuit and a transformer control device.
The utility model provides a railway traction power supply circuit, which comprises a transformer, a load, a protection pressure plate, a transformer closing switch, a delay closing device and a no-voltage release;
the transformer, the load, the protection pressing plate and the transformer closing switch are sequentially connected in series;
the time-delay switching-on device and the voltage-loss tripper are respectively connected with the transformer switching-on switch in parallel;
the voltage-loss tripper is used for controlling the voltage-loss disconnection of the transformer closing switch;
the time-delay switching-on device is used for conducting connection after the transformer switching-on switch is disconnected due to voltage loss and when the voltage of the transformer is detected to be stable, so that the transformer provides voltage for the load through the time-delay switching-on device.
In some embodiments, the time delay switching device comprises a first electronic time relay; the first electronic time relay is used for conducting connection after the transformer closing switch is disconnected in a voltage loss mode and when voltage stabilization time delay of the transformer is detected, so that the transformer provides voltage for the load through the first electronic time relay.
In some embodiments, the time delay switching-on device further comprises a second electronic time relay; the second electronic time relay is connected in series with the first electronic time relay;
the second electronic time relay is used for delaying the conduction connection after the voltage of the transformer closing switch is lost and the connection is disconnected and when the voltage of the transformer is detected to be stable;
the setting delay time of the second electronic time relay is less than the setting delay time of the first electronic time relay.
In some embodiments, the time-delay switching-on device further includes a base, and the first electronic time relay and the second electronic time relay are fixedly disposed on the base; the base is provided with a first terminal row and a second terminal row; the connecting terminals on the first terminal row are electrically connected with the connecting terminals on the second terminal row in a one-to-one correspondence manner;
the connecting terminals on the first terminal row are used for being electrically connected with the first electronic time relay and the second electronic time relay; and the connecting terminal on the second terminal row is used for being electrically connected with the protection pressing plate and the transformer closing switch.
In some embodiments, the first terminal row includes a first power terminal, a second power terminal, a first input terminal, a second input terminal;
the second terminal row comprises a third power supply terminal, a fourth power supply terminal, a first output terminal and a second output terminal;
the first power supply terminal is electrically connected to the third power supply terminal, the second power supply terminal is electrically connected to the fourth power supply terminal, the first input terminal is electrically connected to the first output terminal, and the second input terminal is electrically connected to the second output terminal;
the first electronic time relay comprises a first live wire terminal, a first closing signal output terminal and a second closing signal output terminal;
the second electronic time relay comprises a first zero line terminal, a third closed signal output terminal and a fourth closed signal output terminal;
the first live wire terminal is electrically connected with the first power supply terminal; the first zero line terminal is electrically connected with the second power supply terminal; the second power supply connecting terminal is electrically connected with the first zero line terminal; the first power supply connecting terminal is electrically connected with the second power supply connecting terminal; the first live wire terminal is electrically connected with the first power supply connecting terminal; the first closed signal output terminal is electrically connected with the first input terminal; the first closed signal output terminal is electrically connected with the second closed signal output terminal; the second closed signal output terminal is electrically connected with the fourth closed signal output terminal; the fourth closed signal output terminal is electrically connected with the third closed signal output terminal; the third closed signal output terminal is electrically connected with the second input terminal;
the third power terminal is electrically connected with a live wire terminal of the transformer; the fourth power supply terminal is electrically connected with a zero line terminal of the transformer; the first output terminal is electrically connected with the input end of the transformer closing switch; the second output terminal is electrically connected with the output end of the transformer closing switch.
In some embodiments, the first electronic time relay is provided with a first rotatable dial, and the second electronic time relay is provided with a second rotatable dial;
the first rotatable dial plate is used for setting the setting delay time of the first electronic time relay; the second rotatable dial is used for setting the setting delay time of the second electronic type time relay.
In some embodiments, the set delay time of the first electronic time relay is greater than 6s; and the difference value between the setting delay time of the first electronic type time relay and the setting delay time of the second electronic type time relay is less than 2s.
In some embodiments, the first electronic time relay and the second electronic time relay are provided with indicator lights.
In some embodiments, the protective platen is a high electrical function platen.
The present disclosure provides a transformer control device, which comprises a transformer and a railway traction power supply circuit.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
according to the technical scheme provided by the embodiment of the disclosure, by arranging the time-delay switching-on device, the time-delay switching-on device is used for conducting connection after the voltage of the transformer switching-on switch is lost and disconnected and when the voltage of the transformer is detected to be stable, so that the transformer provides voltage for a load through the time-delay switching-on device. Therefore, the problem that operation and maintenance personnel have to manually restore power transmission on site when the problems of error tripping and the like exist because a distribution transformer at a high-voltage main switch in the conventional railway traction power supply circuit does not have an automatic switching-on function can be solved. And by arranging the time delay switching-in device, when the voltage of the transformer is detected to be stable and time delay, the switching-in device can be in conduction connection, so that the transformer provides voltage for a load through the time delay switching-in device. Not only improves the working efficiency, but also reduces the electric energy loss, shortens the power transmission time and is convenient for users to use the electricity.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a block diagram of a railway traction power supply circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a time-delay switching-on device according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a closing pulse provided in the embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another delay closing device provided in the embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
Fig. 1 is a block diagram of a railway traction power supply circuit provided in an embodiment of the present disclosure, and as shown in fig. 1, the railway traction power supply circuit includes a transformer 1, a load 2, a protection pressing plate 3, a transformer closing switch 4, a delay closing device 5, and a no-voltage release 6. The transformer 1, the load 2, the protection pressing plate 3 and the transformer closing switch 4 are sequentially connected in series. The delay closing device 5 and the voltage-loss release 6 are respectively connected with the transformer closing switch 4 in parallel. And the voltage-loss release 6 is used for controlling the transformer closing switch 4 to be disconnected in a voltage-loss way. When the transformer closing switch 4 is disconnected, the transformer 3 no longer supplies power to the load 2. The time delay closing device 5 is used for conducting connection after the voltage loss disconnection of the transformer closing switch 4 and when the voltage of the transformer 1 is detected to be stable, so that the transformer 1 provides voltage for the load 2 through the time delay closing device 5. That is, after the transformer closing switch 4 is disconnected due to loss of voltage, when the delay closing device 5 detects that the voltage of the transformer 1 is stable, the delay closing device 5 is connected in a conducting manner, so that the transformer 1 can provide voltage to the load 2 through the delay closing device 5.
According to the technical scheme provided by the embodiment of the disclosure, by arranging the time-delay switching-on device, the time-delay switching-on device is used for conducting connection after the voltage of the transformer switching-on switch is lost and disconnected and when the voltage of the transformer is detected to be stable, so that the transformer provides voltage for a load through the time-delay switching-on device. Therefore, the problem that operation and maintenance personnel have to manually restore power transmission on site when the problems of error tripping and the like exist because a distribution transformer at a high-voltage main switch in the conventional railway traction power supply circuit does not have an automatic switching-on function can be solved. And by arranging the time delay switching-on device, the switching-on device can be in conduction connection when the voltage of the transformer is detected to be stable and time delay, so that the transformer provides voltage for a load through the time delay switching-on device. Not only improves the working efficiency, but also reduces the electric energy loss, shortens the power transmission time and is convenient for users to use the electricity.
In some embodiments, the transformer is provided at a high voltage main switch of a railway traction power supply circuit.
In some embodiments, when the voltage fluctuation amplitude of the transformer is less than or equal to the preset voltage value, it may be determined that the voltage of the transformer is in a stable state. The preset voltage value is set according to the design requirement of the transformer in the actual railway traction power supply circuit, which is not limited by the present disclosure.
In some embodiments, the transformer closing switch 4 and the no-voltage release 6 may be integrated in a circuit breaker, for example.
The railway traction power supply circuit is provided with a protective pressing plate 3, wherein the protective pressing plate 3 is equivalent to a switch and plays a role in connection and disconnection in the railway traction power supply circuit. Such as: when the protective pressing plate 3 of the quick-break protection is opened, the transformer closing switch 4 cannot trip when the load of the switch cabinet is in short circuit, and thus, override trip can be caused, and large-area power failure is caused. Therefore, the protection pressing plate 3 is arranged, so that the voltage-loss release 6 can control the voltage-loss disconnection of the transformer closing switch 4, and the operation and maintenance of the transformer are facilitated.
In some embodiments, the load may be, for example, an electrical device such as an electronic device. When the voltage-loss release controls the transformer closing switch to be disconnected in a voltage-loss mode, the transformer does not supply power to the load any more. The time delay closing device is connected with the transformer closing switch in parallel. After the voltage loss disconnection of the transformer closing switch, if the voltage stabilization time delay of the transformer is detected, the closing device can have voltage conduction connection, so that the transformer provides voltage for the load through the time delay closing device. Therefore, the automatic switching-on function of the distribution transformer can be realized.
In some embodiments, the time delay closing device comprises a first electronic time relay. The first electronic time relay is used for delaying the conduction connection when the voltage of the transformer is detected to be stable after the voltage of the transformer closing switch is lost and disconnected, so that the transformer provides voltage for a load through the first electronic time relay.
The delay switching-on device adopts the electrifying delay function, only one setting time needs to be set for the first electronic time relay, after the first electronic time relay is electrified, the normally closed contact of the transformer switching-on switch can perform delay action according to the setting time, when the delay time is up, the normally closed contact of the transformer switching-on switch can be disconnected, and the normally open contact of the transformer switching-on switch can be closed. And then the first electronic time relay can control the delayed closing of the transformer closing switch, so that the transformer closing switch is switched on in a delayed closing way.
In some embodiments, the delayed closing device further comprises, for example, a second electronic time relay. Fig. 2 is a schematic structural diagram of a time delay switching-on device according to an embodiment of the disclosure, and as shown in fig. 2, the time delay switching-on device further includes, for example, a second electronic time relay 7, and the second electronic time relay 7 is connected in series with the first electronic time relay 8. The second electronic time relay 7 is used for delaying the conduction connection after the voltage of the transformer closing switch is lost and the connection is disconnected and when the voltage of the transformer is detected to be stable. The setting delay time of the second electronic time relay 7 is less than the setting delay time of the first electronic time relay 8.
According to the technical scheme provided by the embodiment of the disclosure, the setting delay time of the second electronic time relay 7 is less than that of the first electronic time relay 8. Like this second electronic type time relay 7 can set for an overlap time with first electronic type time relay 8, then can obtain a more effective and stable closing pulse, like this in the high-pressure master switch department of transformer, can reduce the electric spark when closing a floodgate through this closing pulse for electronic type time relay can carry out stable safe closing and switch on, so that the transformer provides the power through this electronic type time relay to the load.
Exemplarily, fig. 3 is a schematic diagram of a switching-on pulse according to an embodiment of the present disclosure, as shown in fig. 3, the first electronic time relay 8 is configured to delay to turn on the connection when the voltage of the transformer is detected to be stabilized after the transformer switching-on switch is disconnected due to loss of voltage, and the setting delay time of the first electronic time relay is 15s, so that the transformer switching-on switch is switched on after controlling the transformer switching-on switch for 15s when the voltage of the transformer is detected to be stabilized. The second electronic time relay 7 is used for delaying the conduction connection after the voltage of the transformer closing switch is lost and the connection is disconnected and when the voltage of the transformer is detected to be stable. The setting delay time of the second electronic time relay 7 is less than the setting delay time of the first electronic time relay 8. The setting delay time of the second electronic time relay 7 is 14s, so that the second electronic time relay 7 and the first electronic time relay 8 can set the overlapping time of 6s-12s, and an effective and stable closing pulse can be obtained in 6s-12 s.
In some embodiments, as shown in fig. 2, the delayed closing device further includes a base 9, and the first electronic time relay 8 and the second electronic time relay 7 are fixedly disposed on the base 9. The base 9 is provided with a first terminal row 91 and a second terminal row 92. The connection terminals on the first terminal row 91 are electrically connected to the connection terminals on the second terminal row 92 in a one-to-one correspondence. The connection terminals on the first terminal row 91 are used for electrical connection with the first electronic time relay 8 and the second electronic time relay 7. The connection terminals on the second terminal row 92 are used to electrically connect to the load, the protective platen, and the transformer closing switch.
In some embodiments, fig. 4 is a schematic structural diagram of another delayed closing apparatus provided in the embodiments of the present disclosure, and as shown in fig. 4, the first terminal row 91 includes a first power terminal P11, a second power terminal P22, a first input terminal S11, and a second input terminal S22. The second terminal row 92 includes a third power supply terminal P1, a fourth power supply terminal P2, a first output terminal S1, and a second output terminal S2. The first power supply terminal P11 is electrically connected to the third power supply terminal P1, the second power supply terminal P22 is electrically connected to the fourth power supply terminal P2, the first input terminal S11 is electrically connected to the first output terminal S1, and the second input terminal S22 is electrically connected to the second output terminal S2. The first electronic time relay 8 includes a first live wire terminal 86, a first close signal output terminal 85, a second close signal output terminal 88, and a first power supply connection terminal 87. The second electronic time relay 7 includes a first neutral terminal 77, a third close signal output terminal 75, a fourth close signal output terminal 78, and a second power supply connection terminal 71.
The first live terminal 86 is electrically connected to the first power supply terminal P11, and the first neutral terminal 77 is electrically connected to the second power supply terminal P22. The second power supply connection terminal 71 is electrically connected to the first neutral terminal 77. The first power supply connection terminal 87 is electrically connected to the second power supply connection terminal 71. The first live wire terminal 86 is electrically connected to the first power supply connection terminal 87. The first close signal output terminal 85 is electrically connected to the first input terminal S11. The first close signal output terminal 85 is electrically connected to the second close signal output terminal 88. The second close signal output terminal 88 is electrically connected to the fourth close signal output terminal 78. The fourth close signal output terminal 78 is electrically connected to the third close signal output terminal 75. The third close signal output terminal 75 is electrically connected to the second input terminal S22. The third power terminal P1 is electrically connected to a live terminal of the transformer. The fourth power supply terminal P2 is electrically connected to a neutral terminal of the transformer. The first output terminal S1 is electrically connected to an input terminal of the transformer closing switch. The second output terminal S2 is electrically connected to an output terminal of the transformer closing switch.
Specifically, the power supply circuit between the transformer and the first and second electronic time relays includes: the third power terminal P1 is electrically connected to a live terminal of the transformer. The power supply signal outputted from the transformer is supplied from the third power supply terminal P1 to the first power supply terminal P11, and is supplied from the first power supply terminal P11 to the first live wire terminal 86 of the first electronic time relay 8. The first live wire terminal 86 is electrically connected to the first power supply connection terminal 87, and the power signal is transmitted from the first power supply connection terminal 87 of the first electronic time relay 8 to the second power supply connection terminal 71 of the second electronic time relay 7. The second power supply connection terminal 71 is electrically connected to the first neutral terminal 77. The power supply signal is transmitted from the first neutral terminal 77 to the second power supply terminal P22, and from the second power supply terminal P22 to the fourth power supply terminal P2, and the fourth power supply terminal P2 is electrically connected to the neutral terminal of the transformer. The transformer can provide power for the first electronic time relay and the second electronic time relay, and the first electronic time relay and the second electronic time relay can normally operate.
Specifically, the transmission circuit of the time delay closing signal between the transformer and the first electronic time relay and the second electronic time relay comprises: the input end of the transformer closing switch is electrically connected with the first output terminal S1. The first output terminal S1 is electrically connected to the first input terminal S11. The first input terminal S11 is electrically connected to the first close signal output terminal 85. The first close signal output terminal 85 is electrically connected to the second close signal output terminal 88. The second close signal output terminal 88 is electrically connected to the fourth close signal output terminal 78. The fourth close signal output terminal 78 is electrically connected to the third close signal output terminal 75. The third close signal output terminal 75 is electrically connected to the second input terminal S22. The second input terminal S22 is electrically connected to the second output terminal S2. The second output terminal S2 is electrically connected to an output terminal of the transformer closing switch. Therefore, a finished signal transmission circuit can be formed, signal transmission can be carried out between the first electronic type time relay and the second electronic type time relay, the first electronic type time relay and the second electronic type time relay are connected after the voltage loss disconnection of the transformer closing switch, and the voltage of the transformer is detected to be stable, so that the transformer provides voltage for a load through the first electronic type time relay and the second electronic type time relay.
In some embodiments, the third power terminal P1 is electrically connected to a high voltage bus fire line terminal of the transformer. And the fourth power supply terminal P2 is electrically connected with a high-voltage busbar zero line terminal of the transformer.
According to the technical scheme, the first electronic time relay and the second electronic time relay are connected in series, the first electronic time relay and the second electronic time relay have the delay closing function, an effective closing signal can be provided, electric sparks are prevented from being generated when the first electronic time relay and the second electronic time relay are closed, the closing process of the first electronic time relay and the second electronic time relay is more stable, and damage to the first electronic time relay and the second electronic time relay can be reduced.
In some embodiments, as shown in fig. 2, the first electronic time relay 8 is provided with a first rotatable dial 80 and the second electronic time relay 7 is provided with a second rotatable dial 70. The first rotatable dial 80 is used to set the setting delay time of the first electronic time relay 8. The second rotatable dial 70 is used to set the setting delay time of the second electronic time relay 7. Wherein, the setting delay time range of the first rotatable dial plate 80 and the second rotatable dial plate 70 is set to be 0-30 seconds, and the watch covers of the first rotatable dial plate 80 and the second rotatable dial plate 70 are transparent plates, so that the setting delay time of the setting of the first rotatable dial plate 80 and the second rotatable dial plate 70 can be conveniently checked.
In some embodiments, the set delay time of the first electronic time relay is greater than 6s. The difference value between the setting delay time of the first electronic type time relay and the setting delay time of the second electronic type time relay is less than 2s. Therefore, the first electronic time relay and the second electronic time relay can set an overlapping time conveniently, and an effective closing pulse can be obtained.
In some embodiments, the first electronic time relay and the second electronic time relay are provided with indicator lights. The indicator light can display the working states of the first electronic time relay and the second electronic time relay.
In some embodiments, the indicator light includes a first indicator light and a second indicator light, the first indicator light being disposed above the second indicator light. When the third power supply terminal P1 and the fourth power supply terminal P2 are connected to a 220V ac power supply, the first indicator lamp is turned on. And when the first electronic time relay and the second electronic time relay reach the setting delay time, the second indicator light is turned on. Therefore, the use working states of the first electronic time relay and the second electronic time relay can be checked conveniently.
In some embodiments, the protective platen is a high electrical function platen.
According to the technical scheme, the delay switching-on device comprises the first electronic time relay and the second electronic time relay, when a line is normally overhauled and powered off, the transformer is in voltage loss, and the low-voltage main switch and/or the high-voltage main switch can automatically trip. When a power supply side is powered on, the third power supply terminal P1 and the fourth power supply terminal P2 are connected with the power supply, and after the preset setting delay time, the delay closing device can control the transformer closing switch to be in voltage conduction connection, so that power is supplied to a load. When the line equipment has faults, the high-voltage main switch and/or the high-voltage main switch can automatically trip, and the delay switching-on device does not automatically coincide. When the high-voltage main switch and/or the high-voltage main switch are/is manually separated, the delay switching-on device is not automatically superposed. Therefore, the safety performance requirement of the switching-on device can be met, and the power supply accident caused by the mistaken switching-on can be avoided.
In some embodiments, for example, a housing is further disposed on the base of the time delay closing device, and the housing encloses the first electronic time relay and the second electronic time relay. The housing may be, for example, stainless steel material and the thickness of the housing may be, for example, 1mm. This can shield electromagnetic interference. The housing may be secured to the base, for example, by bolts. Wherein, the top of shell for example is transparent face guard, and thickness is 1mm, and the material at shell top for example can be the plastics material, is convenient for be used for observing first electronic type time relay and second electronic type time relay's dial plate.
Alternatively, the diameter of the bolt may be, for example, 6mm. The base 9 may be made of, for example, stainless steel, and has a thickness of 3mm. As shown in fig. 2, the base is provided with 4 threaded holes 10, and the threaded holes 10 are used for fixing bolts, so that the housing is fixedly arranged on the base 9.
In some embodiments, the base may be fixedly disposed on a low-voltage switchgear of the transformer, for example, by bolts.
The embodiment of the disclosure provides a transformer control device, which comprises a transformer and a railway traction power supply circuit.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A railway traction power supply circuit is characterized by comprising a transformer, a load, a protection pressing plate, a transformer closing switch, a delay closing device and a no-voltage release;
the transformer, the load, the protection pressing plate and the transformer closing switch are sequentially connected in series;
the time-delay switching-on device and the voltage-loss tripper are respectively connected with the transformer switching-on switch in parallel;
the voltage-loss tripper is used for controlling the voltage-loss disconnection of the transformer closing switch;
the time-delay switching-on device is used for conducting connection after the transformer switching-on switch is disconnected due to voltage loss and when the voltage of the transformer is detected to be stable, so that the transformer provides voltage for the load through the time-delay switching-on device.
2. The circuit of claim 1, wherein the time delay closing device comprises a first electronic time relay; the first electronic time relay is used for conducting connection after the transformer closing switch is disconnected in a voltage loss mode and when voltage stabilization time delay of the transformer is detected, so that the transformer provides voltage for the load through the first electronic time relay.
3. The circuit of claim 2, wherein the time delay switching device further comprises a second electronic time relay; the second electronic time relay is connected in series with the first electronic time relay;
the second electronic time relay is used for delaying the conduction connection after the voltage of the transformer closing switch is lost and the connection is disconnected and when the voltage of the transformer is detected to be stable;
the setting delay time of the second electronic type time relay is smaller than the setting delay time of the first electronic type time relay.
4. The circuit of claim 3, wherein the time delay switching device further comprises a base, and the first electronic time relay and the second electronic time relay are fixedly arranged on the base; the base is provided with a first terminal row and a second terminal row; the connecting terminals on the first terminal row are electrically connected with the connecting terminals on the second terminal row in a one-to-one correspondence manner;
the connecting terminals on the first terminal row are used for being electrically connected with the first electronic time relay and the second electronic time relay; the connecting terminal on the second terminal row is used for being electrically connected with the transformer.
5. The circuit of claim 4, wherein the first terminal row includes a first power terminal, a second power terminal, a first input terminal, a second input terminal;
the second terminal row comprises a third power supply terminal, a fourth power supply terminal, a first output terminal and a second output terminal;
the first power supply terminal is electrically connected to the third power supply terminal, the second power supply terminal is electrically connected to the fourth power supply terminal, the first input terminal is electrically connected to the first output terminal, and the second input terminal is electrically connected to the second output terminal;
the first electronic time relay comprises a first live wire terminal, a first closing signal output terminal and a second closing signal output terminal;
the second electronic time relay comprises a first zero line terminal, a third closed signal output terminal and a fourth closed signal output terminal;
the first live wire terminal is electrically connected with the first power supply terminal; the first zero line terminal is electrically connected with the second power supply terminal; the second power supply connecting terminal is electrically connected with the first zero line terminal; the first power supply connecting terminal is electrically connected with the second power supply connecting terminal; the first live wire terminal is electrically connected with the first power supply connecting terminal; the first closed signal output terminal is electrically connected with the first input terminal; the first closed signal output terminal is electrically connected with the second closed signal output terminal; the second closed signal output terminal is electrically connected with the fourth closed signal output terminal; the fourth closed signal output terminal is electrically connected with the third closed signal output terminal; the third closed signal output terminal is electrically connected with the second input terminal;
the third power terminal is electrically connected with a live wire terminal of the transformer; the fourth power supply terminal is electrically connected with a zero line terminal of the transformer; the first output terminal is electrically connected with the input end of the transformer closing switch; the second output terminal is electrically connected with the output end of the transformer closing switch.
6. The circuit of claim 3, wherein the first electronic time relay is provided with a first rotatable dial, and the second electronic time relay is provided with a second rotatable dial;
the first rotatable dial plate is used for setting the setting delay time of the first electronic time relay; the second rotatable dial is used for setting the setting delay time of the second electronic type time relay.
7. The circuit of claim 6, wherein the set delay time of the first electronic time relay is greater than 6s; and the difference value between the setting delay time of the first electronic type time relay and the setting delay time of the second electronic type time relay is less than 2s.
8. The circuit of claim 3, wherein the first electronic time relay and the second electronic time relay are each provided with an indicator light.
9. The circuit of claim 1, wherein the protective platen is a high power functional platen.
10. A transformer control arrangement, characterized in that it comprises a railway traction power supply circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210922520.2A CN115332014B (en) | 2022-08-02 | 2022-08-02 | Railway traction power supply circuit and transformer control device |
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| CN202210922520.2A CN115332014B (en) | 2022-08-02 | 2022-08-02 | Railway traction power supply circuit and transformer control device |
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| CN115332014B CN115332014B (en) | 2023-06-20 |
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| CN205881836U (en) * | 2016-08-10 | 2017-01-11 | 国网浙江台州市黄岩区供电公司 | Electronic type time relay switching -on device that delays |
| CN107026424A (en) * | 2017-04-01 | 2017-08-08 | 国网浙江台州市黄岩区供电公司 | A kind of distribution low-voltage master switch automatic time delay closing device |
| RU2674399C1 (en) * | 2017-09-19 | 2018-12-07 | Камиль Субханвердиевич Субханвердиев | Ac electric traction network power supply automation |
| CN112103136A (en) * | 2020-09-12 | 2020-12-18 | 胡令江 | Time delay relay with anti-interference performance |
| CN112290548A (en) * | 2020-11-06 | 2021-01-29 | 国网湖南省电力有限公司 | Automatic switching-on and switching-off device of distribution transformer for agricultural distribution network alternating current ice melting |
| CN113872202A (en) * | 2021-11-06 | 2021-12-31 | 威胜电气有限公司 | Switch capable of being replaced in electrified mode and electrified replacement method thereof |
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2022
- 2022-08-02 CN CN202210922520.2A patent/CN115332014B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205881836U (en) * | 2016-08-10 | 2017-01-11 | 国网浙江台州市黄岩区供电公司 | Electronic type time relay switching -on device that delays |
| CN107026424A (en) * | 2017-04-01 | 2017-08-08 | 国网浙江台州市黄岩区供电公司 | A kind of distribution low-voltage master switch automatic time delay closing device |
| RU2674399C1 (en) * | 2017-09-19 | 2018-12-07 | Камиль Субханвердиевич Субханвердиев | Ac electric traction network power supply automation |
| CN112103136A (en) * | 2020-09-12 | 2020-12-18 | 胡令江 | Time delay relay with anti-interference performance |
| CN112290548A (en) * | 2020-11-06 | 2021-01-29 | 国网湖南省电力有限公司 | Automatic switching-on and switching-off device of distribution transformer for agricultural distribution network alternating current ice melting |
| CN113872202A (en) * | 2021-11-06 | 2021-12-31 | 威胜电气有限公司 | Switch capable of being replaced in electrified mode and electrified replacement method thereof |
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| CN115332014B (en) | 2023-06-20 |
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