CN220359042U - Purifying power supply device special for railway - Google Patents
Purifying power supply device special for railway Download PDFInfo
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- CN220359042U CN220359042U CN202323086947.2U CN202323086947U CN220359042U CN 220359042 U CN220359042 U CN 220359042U CN 202323086947 U CN202323086947 U CN 202323086947U CN 220359042 U CN220359042 U CN 220359042U
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- 238000004891 communication Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims 5
- 238000000746 purification Methods 0.000 claims 1
- 230000011664 signaling Effects 0.000 description 11
- 239000000779 smoke Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The utility model discloses a special purifying power supply device for railways, which reduces the single-phase 27.5kV voltage on a railway contact network to 10kV through a power transformer, inputs the single-phase 27.5kV voltage into a step-down transformer through an input high-voltage switch cabinet, outputs more than two 660V three-phase alternating current power supplies I and more than one four-wire 380V three-phase alternating current power supply I after the step-down transformer steps down, outputs more than two 660V three-phase alternating current power supplies II after each 660V three-phase alternating current power supply I passes through a converter, outputs a pure and reliable high-quality 10kV three-phase power supply after the step-up transformer steps up, and outputs a four-wire 380V three-phase alternating current power supply II at the input end of the step-up transformer.
Description
Technical Field
The utility model belongs to the technical field of power transformation equipment, and relates to a special purifying power supply device for a railway.
Background
The electrified railway is powered by a 10kV power grid, and at present, the power supply of the 10kV power grid of the existing electrified railway is in two modes, the first mode is to take power from a single-phase 27.5kV contact net of two power supply arms of a traction network, and a three-phase power supply is obtained through a 27.5kV/10kV transformer, but the stability of the power supply voltage is poor, the voltage is unbalanced, and the power quality is low; the second method introduces a 10kV special line from the place to supply power to the railway distribution network, but the 10kV special line is paved, so that the one-time construction cost and the later operation and maintenance cost of the railway are increased.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provide the special purifying power supply device for the railway, wherein the 10kV power supply obtained by the purifying power supply device directly takes power from a single-phase 27.5kV contact net, the voltage is less influenced by harmonic waves, the power supply is pure and reliable, the voltage stability is high, the electric energy quality is good, a high-quality power supply is provided for railway communication, signals and stations, and the power is taken on site, so that the one-time construction cost and the later operation and maintenance cost of the railway are greatly reduced.
In order to achieve the above object, the technical solution of the present utility model is: a special purifying power supply device for a railway comprises a power transformer, an input high-voltage switch cabinet, a step-down transformer, two or more converters, a step-up transformer and an output high-voltage switch cabinet; the single-phase 27.5kV power supply on the contact network is connected to the input end of the power transformer, the output end of the power transformer is connected to the input end of the high-voltage switch cabinet, and the 10kV three-phase alternating-current power supply I output by the output end of the high-voltage switch cabinet is connected to the input end of the step-down transformer; the output end of the step-down transformer outputs more than two 660V three-phase alternating current power supplies I and one four-wire 380V three-phase alternating current power supply I; two or more 660V three-phase alternating current power supplies I are respectively connected with a converter and then are connected with two or more 660V three-phase alternating current power supplies II at the input end of a step-up transformer, and the input end of the step-up transformer is also provided with a four-wire 380V three-phase alternating current power supply II; the 10kV three-phase alternating current power supply II output by the output end of the step-up transformer is connected with the input end of the output high-voltage switch cabinet; the output end of the output high-voltage switch cabinet outputs a 10kV three-phase alternating current power supply III for supplying power to a 10kV power grid of the electrified railway; the automatic transfer switch is connected between the four-wire 380V three-phase alternating current power supply II and the four-wire 380V three-phase alternating current power supply I, and then is connected with the power supply of the input high-voltage switch cabinet, the output high-voltage switch cabinet and each converter.
Further preferably, the converter includes a three-phase rectifying circuit, a three-phase inverter circuit, and a controller; the 660V three-phase alternating current power supply I is connected with an input filter composed of 3 capacitors C1 and 3 inductors L1 through a switch K1, then is connected with the input end of a three-phase rectifying circuit composed of six IGBT I, the output end of the three-phase rectifying circuit is connected with the capacitor C3 in parallel and then is input into the input end of a three-phase inverter circuit composed of six IGBT II, and the output end of the three-phase inverter circuit is connected with an output filter composed of 3 capacitors C2 and 3 inductors L2 and then is output to the 660V three-phase alternating current power supply II through the switch K2; the controller adopts a controller based on DSP+FPGA, the voltage of the input end of the three-phase rectifying circuit and the voltage of the output side of the three-phase inverter circuit which are acquired by the two voltage sensors are input into the voltage input end of the controller, and the current of the input end of the three-phase rectifying circuit and the current of the output side of the three-phase inverter circuit which are acquired by the two current sensors are input into the current input end of the controller; the driving signals output by the controller drive the six IGBTs I and the six IGBTs II to operate.
Further preferably, the converter further comprises a soft start unit; the soft start unit comprises a resistor R, a switch K3 and a bridge rectifier circuit D; the input end of the bridge rectifier circuit D is connected to the two-phase line of the 660V three-phase alternating current power supply I through a resistor R and a switch K3, and the positive electrode and the negative electrode of the output end of the bridge rectifier circuit D are connected to the positive electrode and the negative electrode of the output end of the three-phase rectifier circuit.
Further preferably, the indoor of the input high-voltage switch cabinet and the indoor of the output high-voltage switch cabinet are both provided with a high-voltage cabinet microcomputer protection device, the indoor of the step-down transformer and the indoor of the step-up transformer are both provided with a temperature controller and an industrial exhaust fan, and the indoor of the current transformer is provided with an industrial air conditioner; the input end of the remote measurement and control terminal RTU is provided with a high-voltage cabinet signal output by the input high-voltage switch cabinet, a high-voltage cabinet signal output by the output high-voltage switch cabinet, a temperature control signal output by the temperature controller and an automatic transfer switch signal output by the automatic transfer switch; the output end of the remote measurement and control terminal RTU, the industrial air conditioner, the high-voltage cabinet microcomputer protection device, the industrial exhaust fan and the converter are respectively connected with a communication manager, the communication manager is connected with an upper computer, and the upper computer is connected with a background dispatching center. The remote measurement and control terminal RTU is responsible for collecting signals, the communication manager is responsible for analyzing the devices such as the remote measurement and control terminal RTU, an industrial air conditioner, a high-voltage cabinet microcomputer protection device, an industrial exhaust fan, a converter and the like, can be monitored in a centralized manner through an upper computer, and finally is uploaded to a background dispatching center, so that the purposes of remote monitoring and control of the device are achieved.
The beneficial effects of this novel are: according to the utility model, the single-phase 27.5kV voltage on a railway contact network is reduced to 10kV through a power transformer, then the single-phase 27.5kV voltage is input into a step-down transformer through an input high-voltage switch cabinet, more than two fluctuation 660V three-phase alternating current power supplies I and one four-wire 380V three-phase alternating current power supply I which contain harmonic waves are output after the step-down transformer steps down, each 660V three-phase alternating current power supply I respectively outputs a stable low-harmonic sinusoidal voltage 660V three-phase alternating current power supply II to the step-up transformer after the current is converted through a converter, the input end of the step-up transformer is also provided with a four-wire 380V three-phase alternating current power supply II, the step-up transformer outputs a pure and reliable high-quality 10kV three-phase power supply, and the power supply is supplied to a railway system after the high-voltage switch cabinet is output, so that the power decoupling of 27.5kV and 10kV is realized, and the power quality and the power supply reliability of the 10kV side are effectively ensured. The pure and reliable four-wire 380V three-phase alternating current power supply II is used as a main power supply, the four-wire 380V three-phase alternating current power supply I is used as a standby power supply to provide self-use power for all ring control equipment, control equipment and the like in the power supply device, and the reliability of the power supply of the equipment is effectively ensured.
Drawings
FIG. 1 is a schematic diagram of a circuit configuration of the present utility model;
fig. 2 is a schematic circuit diagram of a current transformer in the present utility model;
FIG. 3 is a diagram of an auxiliary power supply self-powered power supply system of the device according to the present utility model;
fig. 4 is a communication schematic diagram of the present utility model.
In the figure, 1 is a power transformer, 2 is an input high-voltage switch cabinet, 3 is a step-down transformer, 4 is two converters, 5 is a step-up transformer, 6 is an output high-voltage switch cabinet, 41 is a starting unit, 42 is a three-phase rectifying circuit, 43 is a three-phase inverter circuit, 44 is an input filter, and 45 is an output filter.
Detailed Description
The utility model is further described below with reference to the drawings and detailed description.
As shown in fig. 1 to 4, the present embodiment includes a power transformer 1, an input high-voltage switch cabinet 2, a step-down transformer 3, two converters 4, a step-up transformer 5, and an output high-voltage switch cabinet 6. The single-phase 27.5kV power supply on the contact network is connected to the input end of the power transformer 1, the output end of the power transformer 1 is connected to the input end of the high-voltage switch cabinet 2, and the 10kV three-phase alternating-current power supply I output by the output end of the high-voltage switch cabinet 2 is connected to the input end of the step-down transformer 3. The output end of the step-down transformer 3 outputs two 660V three-phase alternating current power supplies I and one four-wire 380V three-phase alternating current power supply I. The two 660V three-phase alternating current power supplies I are respectively connected with the two 660V three-phase alternating current power supplies II at the input end of the step-up transformer 5 after being connected with the converter 4, and the four-wire 380V three-phase alternating current power supply II is also arranged at the input end of the step-up transformer. The 10kV three-phase alternating current power supply II output by the output end of the step-up transformer is connected with the input end of the output high-voltage switch cabinet 6; and the output end of the output high-voltage switch cabinet 6 outputs a 10kV three-phase alternating current power supply III to supply power for a 10kV power grid of the electrified railway. An automatic change-over switch is connected between a four-wire 380V three-phase alternating current power supply II and a four-wire 380V three-phase alternating current power supply I to serve as auxiliary power supplies of main and standby power supply providing equipment, such as power supplies for an input high-voltage switch cabinet 2, an output high-voltage switch cabinet 6 and all converters 4.
The converter 4 includes a soft start unit 41, a three-phase rectifying circuit 42, a three-phase inverter circuit 43, and a controller. The 660V three-phase alternating current power supply I is connected with an input filter 44 consisting of 3 capacitors C1 and 3 inductors L1 through a switch K1, then is connected with the input end of a three-phase rectifying circuit 42 consisting of six IGBT I, the output end of the three-phase rectifying circuit 42 is connected with the input end of a three-phase inverter circuit 43 consisting of six IGBT II in parallel, and the output end of the three-phase inverter circuit 43 is connected with an output filter 45 consisting of 3 capacitors C2 and 3 inductors L2, and then outputs the 660V three-phase alternating current power supply II through a switch K2. The soft start unit 41 includes a resistor R, a switch K3, and a bridge rectifier circuit D composed of four diodes; the input end of the bridge rectifier circuit D is connected to the two-phase line of the 660V three-phase alternating current power supply I through a resistor R and a switch K3, and the positive electrode and the negative electrode of the output end of the bridge rectifier circuit D are connected to the positive electrode and the negative electrode of the output end of the three-phase rectifier circuit 42. The soft start unit is adopted to restrain the current surge at the moment of the input of the converter. The controller adopts a driving signal output by the controller based on DSP+FPGA to drive six IGBTs I and six IGBTs II to operate, and the controller collects the current and the voltage of the input end of the three-phase rectifying circuit 42 and the current and the voltage of the output side of the three-phase inverter circuit 43 through a voltage sensor and a current sensor as the current input signal and the voltage input signal of the controller. The automatic transfer switch is connected between the four-wire 380V three-phase alternating current power supply II and the four-wire 380V three-phase alternating current power supply I to provide power for the controllers of the converters 4. The design of the converter circuit optimizes the system capacity; the converter adopts modularized and redundant design, so that the stability of converter control is ensured.
The microcomputer protection device and the smoke sensor of the type BHE-316 high-voltage switch cabinet are arranged in the room where the input high-voltage switch cabinet 2 is installed and the room where the output high-voltage switch cabinet 6 is installed. The temperature controller, the industrial exhaust fan, the temperature and humidity controller and the smoke sensor are arranged in the room where the step-down transformer 3 is arranged and the room where the step-up transformer 5 is arranged, and the industrial air conditioner and the smoke sensor are arranged in the room where the converter 4 is arranged. The method comprises the steps of inputting high-voltage cabinet signals such as breaker closing position, dividing position, grounding closing position, dividing position and the like output by a high-voltage switch cabinet 2, outputting high-voltage cabinet signals such as breaker closing position, dividing position, grounding closing position, dividing position and the like output by a high-voltage switch cabinet 6, starting a fan, overtemperature alarming, temperature control instrument signals such as overtemperature Wen Tiaozha and the like output by a step-down transformer, starting a fan, overtemperature alarming, temperature control instrument signals such as overtemperature alarming and ultra Wen Tiaozha and the like output by a step-up transformer, automatic change-over switch signals such as switching closing position and dividing position and the like output by an automatic change-over switch, industrial exhaust fan starting and heater starting isothermal humidity controller signals output by a temperature and humidity controller, and smoke sensor signals such as a high-voltage chamber smoke alarm signal and a converter chamber smoke alarm signal and the like output by a smoke sensor are connected to the input end of a remote measurement and control terminal RTU. Remote signaling amounts such as high-voltage cabinet signals and temperature and humidity controller signals output by a remote measurement and control terminal RTU, remote signaling amounts such as ambient temperature and humidity remote measurement, starting and stopping remote signaling, remote control amounts, temperature and humidity threshold adjustment amounts output by an industrial air conditioner, remote signaling amounts such as voltage and current output by a high-voltage cabinet microcomputer protection device, remote signaling amounts such as switch closing and opening and remote signaling amounts such as switch protection, remote signaling amounts such as voltage and current output by a converter, remote signaling amounts such as device starting and stopping remote signaling amounts and protection fixed values, remote signaling amounts such as starting and stopping remote signaling amounts and faults of a UPS output device are connected to an input end of a communication manager with the model number of BHE-358N, an output end of the communication manager is connected to an input end of an upper computer, and the input end of the upper computer is connected to a background dispatching center. The remote measurement and control terminal RTU is responsible for collecting signals, the communication manager is responsible for analyzing the devices such as the remote control terminal RTU, the industrial air conditioner, the high-voltage cabinet microcomputer protection device, the industrial exhaust fan, the converter 4 and the like, can be monitored in a centralized manner through the upper computer, and finally is uploaded to the background dispatching center, so that the purposes of remote monitoring and control of the device are achieved. The transformer chamber adopts an industrial exhaust fan to realize forced heat dissipation, and the converter chamber adopts an industrial air conditioner to realize constant temperature and humidity of the converter chamber, so that the running stability of the whole device is ensured. An automatic change-over switch is connected between the four-wire 380V three-phase alternating current power supply II and the four-wire 380V three-phase alternating current power supply I to serve as a main power supply and a standby power supply to provide power for all equipment.
According to the embodiment, the single-phase 27.5kV voltage on a railway contact network is reduced to 10kV through the power transformer 1, then the single-phase 27.5kV voltage is input into the step-down transformer 3 through the input high-voltage switch cabinet 2, more than two fluctuation 660V three-phase alternating current power supplies I and one four-wire 380V three-phase alternating current power supply I which contain harmonic waves are output after the step-down transformer 3 steps down, each 660V three-phase alternating current power supply I outputs a stable low-harmonic sinusoidal voltage 660V three-phase alternating current power supply II to the step-up transformer 5 after the current is converted through the converter 4, the four-wire 380V three-phase alternating current power supply II is arranged at the input end of the step-up transformer 5, and a pure and reliable high-quality 10kV three-phase power supply is output to a railway system after the step-up transformer 5 steps down, so that power decoupling of 27.5kV and 10kV power is realized, and the power supply reliability of the 10kV side is effectively ensured. The pure and reliable four-wire 380V three-phase alternating current power supply II is used as a main power supply, the four-wire 380V three-phase alternating current power supply I is used as a standby power supply to provide self-use power for all ring control equipment, control equipment and the like in the power supply device, and the reliability of the power supply of the equipment is effectively ensured.
There are, of course, many other embodiments of the utility model that will be apparent to those skilled in the art from consideration of this disclosure without departing from the spirit and nature of the utility model, and that will fall within the scope of the claims.
Claims (4)
1. The utility model provides a special purification power supply unit of railway which characterized in that: the high-voltage power supply comprises a power transformer (1), an input high-voltage switch cabinet (2), a step-down transformer (3), two or more converters (4), a step-up transformer (5) and an output high-voltage switch cabinet (6); the single-phase 27.5kV power supply on the contact network is connected to the input end of the power transformer (1), the output end of the power transformer (1) is connected to the input end of the high-voltage switch cabinet (2), and the 10kV three-phase alternating-current power supply I output by the output end of the high-voltage switch cabinet (2) is connected to the input end of the step-down transformer (3); the output end of the step-down transformer (3) outputs more than two 660V three-phase alternating current power supplies I and one four-wire 380V three-phase alternating current power supply I; two or more 660V three-phase alternating current power supplies I are respectively connected with a converter (4) and then are connected with two or more 660V three-phase alternating current power supplies II at the input end of a step-up transformer (5), and a four-wire 380V three-phase alternating current power supply II is also arranged at the input end of the step-up transformer; the 10kV three-phase alternating current power supply II output by the output end of the step-up transformer is connected with the input end of the output high-voltage switch cabinet (6); the output end of the output high-voltage switch cabinet (6) outputs a 10kV three-phase alternating current power supply III; the automatic transfer switch is connected between the four-wire 380V three-phase alternating current power supply II and the four-wire 380V three-phase alternating current power supply I, and then is connected with the power supplies of the input high-voltage switch cabinet (2), the output high-voltage switch cabinet (6) and all converters (4).
2. The railway-specific purifying power supply apparatus according to claim 1, wherein: the converter (4) comprises a three-phase rectifying circuit (42), a three-phase inverter circuit (43) and a controller; the 660V three-phase alternating current power supply I is connected with an input filter (44) consisting of 3 capacitors C1 and 3 inductors L1 through a switch K1, then is connected with the input end of a three-phase rectifying circuit (42) consisting of six IGBT I, the output end of the three-phase rectifying circuit (42) is connected with a capacitor C3 in parallel, then is input into the input end of a three-phase inverter circuit (43) consisting of six IGBT II, and the output end of the three-phase inverter circuit (43) is connected with an output filter (45) consisting of 3 capacitors C2 and 3 inductors L2, and then is output with the 660V three-phase alternating current power supply II through a switch K2; the controller adopts a controller based on DSP+FPGA, the voltage of the input end of the three-phase rectifying circuit (42) and the voltage of the voltage input end of the output side of the three-phase inverter circuit (43) are respectively collected through two voltage sensors, the current of the input end of the three-phase rectifying circuit (42) and the current of the output side of the three-phase inverter circuit (43) are respectively collected through two current sensors and are input into the current input end of the controller, and the driving signals output by the controller drive six IGBTs I and six IGBTs II to operate.
3. The railway-specific purifying power supply apparatus according to claim 2, wherein: the converter further comprises a soft start unit (41); the soft start unit (41) comprises a resistor R, a switch K3 and a bridge rectifier circuit D; the input end of the bridge rectifier circuit D is connected to the two-phase line of the 660V three-phase alternating current power supply I through a resistor R and a switch K3, and the positive electrode and the negative electrode of the output end of the bridge rectifier circuit D are connected to the positive electrode and the negative electrode of the output end of the three-phase rectifier circuit (42).
4. A railway-specific purifying power supply apparatus according to claim 1 or 2 or 3, characterized in that: the indoor of the installation input high-voltage switch cabinet (2) and the indoor of the installation output high-voltage switch cabinet (6) are both provided with high-voltage cabinet microcomputer protection devices, the indoor of the installation step-down transformer (3) and the indoor of the installation step-up transformer (5) are both provided with a temperature controller and an industrial exhaust fan, and the indoor of the installation converter (4) is provided with an industrial air conditioner; the high-voltage cabinet signal output by the input high-voltage switch cabinet (2), the high-voltage cabinet signal output by the output high-voltage switch cabinet (6), the temperature control signal output by the temperature controller and the automatic transfer switch signal output by the automatic transfer switch are output to the input end of the remote measurement and control terminal RTU; the output end of the remote measurement and control terminal RTU, the industrial air conditioner, the high-voltage cabinet microcomputer protection device, the industrial exhaust fan and the converter are respectively connected with a communication manager, the communication manager is connected with an upper computer, and the upper computer is connected with a background dispatching center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323086947.2U CN220359042U (en) | 2023-11-16 | 2023-11-16 | Purifying power supply device special for railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323086947.2U CN220359042U (en) | 2023-11-16 | 2023-11-16 | Purifying power supply device special for railway |
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| Publication Number | Publication Date |
|---|---|
| CN220359042U true CN220359042U (en) | 2024-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323086947.2U Active CN220359042U (en) | 2023-11-16 | 2023-11-16 | Purifying power supply device special for railway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220359042U (en) |
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2023
- 2023-11-16 CN CN202323086947.2U patent/CN220359042U/en active Active
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