CN115332014B - 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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- CN115332014B CN115332014B CN202210922520.2A CN202210922520A CN115332014B CN 115332014 B CN115332014 B CN 115332014B CN 202210922520 A CN202210922520 A CN 202210922520A CN 115332014 B CN115332014 B CN 115332014B
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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 pressing plate, a transformer closing switch, a time-delay closing device and a voltage-losing release; the transformer, the load, the protection pressing plate and the transformer closing switch are sequentially connected in series; the delay closing device and the voltage-losing release are respectively connected with the transformer closing switch in parallel; the voltage-losing release is used for controlling the voltage-losing disconnection of the transformer closing switch. According to the technical scheme, the delay closing device is arranged, so that the closing device can be connected in a conducting mode when the voltage stabilization delay of the transformer is detected, the transformer provides voltage for a load through the delay closing 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 voltage loss release is usually arranged in a high-voltage main switch of the distribution transformer, however, the existing distribution transformer does not have an automatic closing function. Therefore, when the switching operation mode of the distribution transformer, the corresponding feed-out cabinet of the distribution substation or the power line trips, namely, faults occur or voltage fluctuation occurs to trip the high-voltage main switch, and the power-on is recovered, the high-voltage main switch cannot be automatically switched on. Therefore, after the incoming call is recovered, all the power supply workshops need to be provided with operation and maintenance personnel to go to the station room substation for manual closing power transmission. Thus, the defects of prolonged power failure time and lower fault handling efficiency can occur. And the normal operation of corresponding electric equipment such as an air conditioner, an elevator and the like is adversely affected, and meanwhile, a plurality of inconveniences are brought to operation and maintenance, so that the labor and mechanical cost is greatly increased.
Meanwhile, the distribution transformer does not have an automatic switching-on function, so that when the problems of false tripping and the like exist, operation and maintenance personnel can be required to manually restore to power transmission on site. Not only reduces the working efficiency, causes a great deal of electric energy loss, but also delays the power transmission time, and brings a plurality of inconveniences to the user for power consumption.
Disclosure of Invention
In order to solve the technical problems, the present disclosure provides a railway traction power supply circuit and a transformer control device.
The present disclosure provides a railway traction power supply circuit, comprising a transformer, a load, a protection pressing plate, a transformer closing switch, a time-delay closing device and a voltage-losing release;
the transformer, the load, the protection pressing plate and the transformer closing switch are sequentially connected in series;
the delay closing device and the voltage-losing release are respectively connected with the transformer closing switch in parallel;
the voltage-losing release is used for controlling the voltage-losing and disconnection of the transformer closing switch;
the delay closing device is used for conducting connection after the transformer closing switch is out of voltage and disconnected, and when the voltage of the transformer is detected to be stable, so that the transformer provides voltage for the load through the delay closing device.
In some embodiments, the time-delay closing device comprises a first electronic time relay; the first electronic time relay is used for conducting connection after the voltage of the transformer closing switch is lost and disconnected 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 closing device further comprises a second electronic time relay; the second electronic time relay is connected with the first electronic time relay in series;
the second electronic time relay is used for delaying the connection after the voltage of the transformer closing switch is lost and the connection is disconnected and when the voltage stability of the transformer is detected;
the setting delay time of the second electronic time relay is smaller than the setting delay time of the first electronic time relay.
In some embodiments, the time-delay closing 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 block 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 block comprises a third power terminal, a fourth power terminal, a first output terminal and a second output terminal;
the first power terminal is electrically connected with the third power terminal, the second power terminal is electrically connected with the fourth power terminal, the first input terminal is electrically connected with the first output terminal, and the second input terminal is electrically connected with the second output terminal;
the first electronic time relay comprises a first live wire terminal, a first closed signal output terminal and a second closed 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 connection terminal is electrically connected with the first zero line terminal; the first power supply connection terminal is electrically connected with the second power supply connection terminal; the first live wire terminal is electrically connected with the first power supply connection 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 closing signal output terminal is electrically connected with the third closing signal output terminal; the third closed signal output terminal is electrically connected with the second input terminal;
the third power supply 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 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 time relay.
In some embodiments, the tuning delay time of the first electronic time relay is greater than 6s; the difference value between the setting delay time of the first electronic time relay and the setting delay time of the second electronic time relay is smaller than 2s.
In some embodiments, the first electronic time relay and the second electronic time relay are each provided with an indicator light.
In some embodiments, the protective platen is a high-current functional platen.
The present disclosure provides a transformer control device including a transformer and a railway traction power supply circuit according to the present disclosure.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
according to the technical scheme, the delay closing device is used for conducting connection after the voltage loss and disconnection of the closing switch of the transformer and when the voltage stability of the transformer is detected, so that the transformer can provide voltage for a load through the delay closing device. Therefore, the problem that operation and maintenance personnel must manually resume power transmission on site when the problems of false tripping exist due to the fact that a distribution transformer at a high-voltage main switch in the existing railway traction power supply circuit does not have an automatic switching-on function can be avoided. And by arranging the time-delay switching-on device, the switching-on device can be connected in a conducting way when the voltage stabilizing time delay of the transformer is detected, 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 electricity.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a block diagram of a railroad traction power supply circuit provided in an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a time-delay closing device according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a closing pulse according to an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of another delay closing device according to an embodiment of the disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments 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 will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
Fig. 1 is a block diagram of a railway traction power supply circuit according to 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 voltage-loss 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-losing release 6 are respectively connected with the transformer closing switch 4 in parallel. The voltage-losing release 6 is used for controlling the voltage-losing disconnection of the transformer closing switch 4. When the transformer closing switch 4 is disconnected, the transformer 3 no longer supplies power to the load 2. The delay closing device 5 is used for conducting connection after the transformer closing switch 4 is out of voltage and disconnected, and when the voltage of the transformer 1 is detected to be stable, so that the transformer 1 provides voltage to the load 2 through the delay closing device 5. Namely, when the voltage of the transformer 1 is detected to be stable by the time-delay switching-on device 5 after the voltage-losing and disconnection of the transformer switching-on switch 4, the time-delay switching-on device 5 is conducted and connected, so that the transformer 1 can provide voltage to the load 2 through the time-delay switching-on device 5.
According to the technical scheme, the delay closing device is used for conducting connection after the voltage loss and disconnection of the closing switch of the transformer and when the voltage stability of the transformer is detected, so that the transformer can provide voltage for a load through the delay closing device. Therefore, the problem that operation and maintenance personnel must manually resume power transmission on site when the problems of false tripping exist due to the fact that a distribution transformer at a high-voltage main switch in the existing railway traction power supply circuit does not have an automatic switching-on function can be avoided. And by arranging the time-delay switching-on device, the switching-on device can be connected in a conducting way when the voltage stabilizing time delay of the transformer is detected, 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 electricity.
In some embodiments, the transformer is provided at a high voltage main switch of the railway traction power supply circuit.
In some embodiments, when the voltage fluctuation amplitude of the transformer is equal to or less than 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 middle transformer of the actual railway traction power supply circuit, and the present disclosure is not limited thereto.
In some embodiments, the transformer closing switch 4 and the step-out 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, and the protective pressing plate 3 is equivalent to a switch and plays roles of switching on and switching off 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 is short-circuited, so that override trip is caused, and large-area power failure is caused. Therefore, the protective pressing plate 3 is arranged, so that the voltage-losing release 6 can control the voltage-losing 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-losing release controls the voltage-losing and disconnection of the transformer closing switch, the transformer does not supply power to the load. The delay closing device is connected with the transformer closing switch in parallel. After the transformer closing switch loses voltage and is disconnected, the closing device can be connected in a voltage-conducting way when voltage stabilization time delay of the transformer is detected, so that the transformer provides voltage for a load through the time delay closing device. Thus, the automatic switching-on function of the distribution transformer can be realized.
In some embodiments, the time-delay closing device includes a first electronic time relay. The first electronic time relay is used for conducting connection after the voltage of the transformer closing switch is lost and disconnected and when voltage stabilization time delay of the transformer is detected, so that the transformer provides voltage for a load through the first electronic time relay.
The delay switching-on device adopts the power-on delay function, and for the first electronic time relay, only one setting time is needed, after the first electronic time relay is powered on, the normally closed contact of the transformer switching-on switch can delay according to the setting time, and when the delay time is up, the normally closed contact of the transformer switching-on switch can be opened, and the normally open contact of the transformer switching-on switch can be closed. And further, the first electronic time relay can control the transformer to switch on and switch off in a delayed manner, so that the transformer to switch on and switch off in a delayed manner.
In some embodiments, the time-lapse closing device further comprises a second electronic time relay, for example. Fig. 2 is a schematic structural diagram of a delay closing device according to an embodiment of the present disclosure, as shown in fig. 2, the delay closing device further includes, for example, a second electronic time relay 7, where 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 conducting connection after the voltage loss and disconnection of the closing switch of the transformer and when the voltage stabilizing time delay of the transformer is detected. The setting delay time of the second electronic time relay 7 is smaller 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 smaller than the setting delay time of the first electronic time relay 8. Thus, the second electronic time relay 7 and the first electronic time relay 8 can set an overlapping time, and then a more effective and stable switching-on pulse can be obtained, so that at the high-voltage main switch of the transformer, the electric spark during switching-on can be reduced through the switching-on pulse, and the electronic time relay can conduct stable and safe switching-on and switching-on, so that the transformer can provide power for a load through the electronic time relay.
Fig. 3 is a schematic diagram of a closing pulse provided by an embodiment of the present disclosure, as shown in fig. 3, a first electronic time relay 8 is used for conducting connection after a transformer closing switch loses voltage and is disconnected, and when a voltage stabilization delay of a transformer is detected, a tuning delay time of the first electronic time relay is 15s, so that the transformer closing switch controls the transformer closing switch to conduct closing after detecting the voltage stabilization of the transformer for 15 s. The second electronic time relay 7 is used for conducting connection after the voltage loss and disconnection of the closing switch of the transformer and when the voltage stabilizing time delay of the transformer is detected. The setting delay time of the second electronic time relay 7 is smaller 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 an overlapping time of 6s-12s, and then an effective and stable closing pulse can be obtained at 6s-12 s.
In some embodiments, as shown in fig. 2, the time-delay switching-on 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 block 91 and a second terminal block 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 terminal on the second terminal block 92 is used for electrically connecting with the load, the protection pressing plate and the transformer closing switch.
In some embodiments, fig. 4 is a schematic structural diagram of still another delay closing device according to an embodiment of the disclosure, 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 block 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 closing signal output terminal 85, a second closing 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 closing signal output terminal 75, a fourth closing signal output terminal 78, and a second power supply connection terminal 71.
The first live wire terminal 86 is electrically connected to the first power supply terminal P11, and the first neutral wire 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 closing signal output terminal 85 is electrically connected to the first input terminal S11. The first closing signal output terminal 85 is electrically connected to the second closing signal output terminal 88. The second closing signal output terminal 88 is electrically connected to the fourth closing signal output terminal 78. The fourth closing signal output terminal 78 is electrically connected to the third closing signal output terminal 75. The third closing signal output terminal 75 is electrically connected to the second input terminal S22. The third power supply terminal P1 is electrically connected to the live terminal of the transformer. The fourth power supply terminal P2 is electrically connected to the neutral terminal of the transformer. The first output terminal S1 is electrically connected to an input 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 supply terminal P1 is electrically connected to the live terminal of the transformer. The power signal output from the transformer is supplied from the third power terminal P1 to the first power terminal P11 and from the first power terminal P11 to the first live 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 supply signal is supplied 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 signal is supplied from the first neutral terminal 77 to the second power terminal P22, and is supplied from the second power terminal P22 to the fourth power terminal P2, and the fourth power 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 be ensured to 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 closing signal output terminal 85. The first closing signal output terminal 85 is electrically connected to the second closing signal output terminal 88. The second closing signal output terminal 88 is electrically connected to the fourth closing signal output terminal 78. The fourth closing signal output terminal 78 is electrically connected to the third closing signal output terminal 75. The third closing 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 complete signal transmission circuit can be formed, signal transmission can be carried out between the first electronic time relay and the second electronic time relay, so that the first electronic time relay and the second electronic time relay are conducted and connected after the voltage of the transformer closing switch is lost and disconnected, and the voltage of the transformer is detected to be stable, and the transformer provides voltage for a load through the first electronic time relay and the second electronic time relay.
In some embodiments, the third power terminal P1 is electrically connected to a high voltage busbar terminal of the transformer. The fourth power terminal P2 is electrically connected to the high-voltage busbar neutral terminal of the transformer.
According to the technical scheme, through series connection between the first electronic time relay and the second electronic time relay, the first electronic time relay and the second electronic time relay are provided with functions of delayed closing, so that 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 set delay time of the first electronic time relay 8. The second rotatable dial 70 is used to set the set delay time of the second electronic time relay 7. Wherein the setting delay time ranges of the first rotatable dial 80 and the second rotatable dial 70 are set to 0 to 30 seconds, and the covers of the first rotatable dial 80 and the second rotatable dial 70 are set to transparent plates, so that the setting delay time of the first rotatable dial 80 and the second rotatable dial 70 can be easily checked.
In some embodiments, the settling delay time of the first electronic time relay is greater than 6s. The difference between the tuning delay time of the first electronic time relay and the tuning delay time of the second electronic time relay is smaller than 2s. Thus, the first electronic time relay and the second electronic time relay are convenient to set an overlapping time, and an effective closing pulse is obtained.
In some embodiments, the first electronic time relay and the second electronic time relay are each provided with an indicator light. The indicator lamp 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 and fourth power terminals P1 and P2 are connected to the 220V ac power source, the first indication lamp is turned on. When the first electronic time relay and the second electronic time relay reach the set delay time, the second indicator light is turned on. This may facilitate viewing the usage status of the first electronic time relay and the second electronic time relay.
In some embodiments, the protective platen is a high-voltage functional platen.
According to the technical scheme, the delay closing device comprising the first electronic time relay and the second electronic time relay is arranged, when a line is normally overhauled and has a power failure, the transformer loses voltage, and the low-voltage main switch and/or the high-voltage main switch can automatically trip. When the 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 a preset setting delay time, the delay closing device can control the transformer closing switch to be connected in a pressure conduction mode, so that power is supplied to a load. When the line equipment fails, the high-voltage main switch and/or the high-voltage main switch can trip automatically, and the delay closing device does not overlap automatically. When the high-voltage main switch and/or the high-voltage main switch are manually separated, the time-delay closing device is not automatically overlapped. Therefore, the safety performance requirement of the switching-on device can be met, and the occurrence of power supply accidents caused by error switching-on can be avoided.
In some embodiments, a housing is further provided on the base of the time-delay closing device, for example, the housing enclosing the first electronic time relay and the second electronic time relay. The housing may be of stainless steel material, for example, and the thickness of the housing may be 1mm, for example. This can shield electromagnetic interference. The housing may be secured to the base, for example, by bolts. The top of the shell is, for example, a transparent mask, the thickness of the shell is 1mm, and the material of the top of the shell can be, for example, plastic material, so that the dial plate of the first electronic time relay and the dial plate of the second electronic time relay can be observed conveniently.
Alternatively, the diameter of the bolt may be 6mm, for example. The material of the base 9 may be, for example, stainless steel, and the thickness of the base is 3mm. As shown in fig. 2, 4 screw holes 10 are provided in the base, and the screw holes 10 are used for fixing bolts to fix the housing to 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 should be noted that in this document, relational terms such as "first" and "second" and the like are 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the 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 and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The railway traction power supply circuit is characterized by comprising a transformer, a load, a protection pressing plate, a transformer closing switch, a time-delay closing device and a voltage-losing release;
the transformer, the load, the protection pressing plate and the transformer closing switch are sequentially connected in series;
the delay closing device and the voltage-losing release are respectively connected with the transformer closing switch in parallel;
the voltage-losing release is used for controlling the voltage-losing and disconnection of the transformer closing switch;
the delay closing device is used for conducting connection after the transformer closing switch is out of voltage and disconnected, and when the voltage of the transformer is detected to be stable, so that the transformer provides voltage for the load through the delay closing device;
the time delay closing device comprises a first electronic time relay; the first electronic time relay is used for conducting connection after the voltage of the transformer closing switch is lost and disconnected 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.
2. The circuit of claim 1, wherein the time-lapse closing device further comprises a second electronic time relay; the second electronic time relay is connected with the first electronic time relay in series;
the second electronic time relay is used for delaying the connection after the voltage of the transformer closing switch is lost and the connection is disconnected and when the voltage stability of the transformer is detected;
the setting delay time of the second electronic time relay is smaller than the setting delay time of the first electronic time relay.
3. The circuit of claim 2, wherein the time-lapse closing device further comprises a base, the first electronic time relay and the second electronic time relay being 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; the connecting terminal on the second terminal row is used for being electrically connected with the transformer.
4. The circuit of claim 3, wherein the first terminal row comprises a first power terminal, a second power terminal, a first input terminal, a second input terminal;
the second terminal block comprises a third power terminal, a fourth power terminal, a first output terminal and a second output terminal;
the first power terminal is electrically connected with the third power terminal, the second power terminal is electrically connected with the fourth power terminal, the first input terminal is electrically connected with the first output terminal, and the second input terminal is electrically connected with the second output terminal;
the first electronic time relay comprises a first live wire terminal, a first closed signal output terminal, a second closed signal output terminal and a first power supply connection terminal;
the second electronic time relay comprises a first zero line terminal, a third closed signal output terminal, a fourth closed signal output terminal and a second power supply connection 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 connection terminal is electrically connected with the first zero line terminal; the first power supply connection terminal is electrically connected with the second power supply connection terminal; the first live wire terminal is electrically connected with the first power supply connection 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 closing signal output terminal is electrically connected with the third closing signal output terminal; the third closed signal output terminal is electrically connected with the second input terminal;
the third power supply 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.
5. The circuit of claim 2, 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 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 time relay.
6. The circuit of claim 5, wherein the settling delay time of the first electronic time relay is greater than 6s; the difference value between the setting delay time of the first electronic time relay and the setting delay time of the second electronic time relay is smaller than 2s.
7. The circuit of claim 2, wherein the first electronic time relay and the second electronic time relay are each provided with an indicator light.
8. The circuit of claim 1, wherein the protective platen is a high-voltage functional platen.
9. A transformer control device comprising a railway traction power supply circuit as claimed in any one of claims 1 to 8.
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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 true CN115332014B (en) | 2023-06-20 |
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| 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)
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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 |
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| CN115332014A (en) | 2022-11-11 |
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