CN211377240U - High-safety subway regenerative braking energy feedback device - Google Patents
High-safety subway regenerative braking energy feedback device Download PDFInfo
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- CN211377240U CN211377240U CN202020218691.3U CN202020218691U CN211377240U CN 211377240 U CN211377240 U CN 211377240U CN 202020218691 U CN202020218691 U CN 202020218691U CN 211377240 U CN211377240 U CN 211377240U
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- direct current
- braking energy
- current side
- cabinet body
- regenerative braking
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Abstract
The utility model discloses a high safe type subway regeneration braking energy repayment device, the intelligent cabinet temperature adjusting device comprises a cabinet body, the inside of the cabinet body is equipped with hyperbaric chamber and low-pressure cabin, and hyperbaric chamber inside is equipped with the electronic isolator of direct current side, direct current side main contactor, direct current side charging contactor, direct current side discharge contactor, charging resistor, discharge resistor, arrester and frame protection module, and the hyperbaric chamber is installed at the rack back, and the low-pressure cabin includes auxiliary power supply, sensor acquisition unit, microcomputer control unit, optical fiber communication module, relay module unit and binding post module, the utility model discloses high safe type subway regeneration braking energy repayment device has high security, advantage that protective capacities is strong, is particularly suitable for the occasion of high-power applications such as subway regeneration braking energy repayment device.
Description
Technical Field
The utility model relates to an energy repayment technical field specifically is a high safe type subway regenerative braking energy repayment device.
Background
At present, regenerative braking energy generated during subway braking generally adopts an inversion feedback mode to feed the energy back to an alternating current medium-voltage power supply system, so that the energy is recycled. The total power of the device reaches megawatt level, the voltage of a direct current side reaches 1500V-2000V, the grid-connected output voltage of an alternating current side reaches 1kV/10kV, interference may exist between strong current and weak current, interference may exist between high voltage and low voltage, the reliability, the operation safety and the personal safety of equipment must be considered in a key way, and no safety problem can occur.
At present, the conventional subway regenerative braking energy feedback device only has an energy feedback function, has a simple protection function and a simple protection function, lacks multiple safety protection and multi-stage protection functions of a system level, a device level and a module level, and has various safety problems in the actual use process, so that the safety and reliability are required to be further improved.
When the subway regenerative braking energy feedback device runs, the equipment has a perfect multi-stage protection function, including software, hardware and electrical multi-stage protection functions, and module-level, device-level and system-level multi-stage protection functions; the equipment also needs to have multiple protection functions, installation wiring between high-voltage elements and low-voltage elements needs to be isolated and partitioned, and high-voltage parts need to be reinforced for insulation and high-strength protection.
Due to the fact that the device is large in power, high in voltage and strong in feedback energy, the safety design concept of the traditional energy feedback device cannot well meet the requirement of complex application environment of the subway, and the conventional simple protection function is not suitable for megawatt-level high-power occasions.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high safe type subway regenerative braking energy feedback device to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a high safe type subway regenerative braking energy feedback device, includes the cabinet body, the inside of the cabinet body is equipped with hyperbaric chamber and low-pressure cabin, and hyperbaric chamber inside is equipped with direct current side electric isolator, direct current side main contactor, direct current side charging contactor, direct current side discharge contactor, charging resistor, discharge resistor, arrester and frame protection module, and the hyperbaric chamber is installed at the rack back, and the low-pressure cabin includes auxiliary power supply, sensor acquisition unit, microcomputer control unit, optical fiber communication module, relay module unit and wiring terminal module.
As a further aspect of the present invention: the voltage levels of the low-voltage ballast are AC220V, DC220V, DC24V, DC15V and DC 5V.
As a further aspect of the present invention: the voltage level of the high-voltage cabin is DC 1500V-2000V.
As a further aspect of the present invention: the cabinet body is also provided with an electromagnetic lock.
As a further aspect of the present invention: a front cabinet door of the cabinet body is provided with a human-computer interface HMI and an operation panel unit, and an indicator light and a knob switch are positioned right in front of the cabinet body 1.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses high safe type subway regenerative braking energy feedback device has the advantage that high security, protective capability are strong, is particularly suitable for the occasion of high-power applications such as subway regenerative braking energy feedback device.
Drawings
Fig. 1 is an outline view of a subway regenerative braking energy feedback device.
Fig. 2 is a low-pressure cabin structure diagram at the front part of the direct current control cabinet.
Fig. 3 is a high-pressure cabin structure diagram at the rear part of the direct current control cabinet.
Fig. 4 is a block diagram of a hardware protection circuit.
Fig. 5 is an electrical schematic of the isolation switch contactor control loop.
Fig. 6 is an electrical schematic diagram of the control of the cabinet door indicator light.
In the figure: the intelligent cabinet comprises a cabinet body 1, an auxiliary power supply 2, a sensor acquisition unit 3, a microcomputer control unit 4, an optical fiber communication unit 5, a relay module unit 6, a wiring terminal module 7, an electromagnetic lock 8, a direct current side electric isolating switch 11, a direct current side main contactor 12, a direct current side charging contactor 13, a direct current side discharging contactor 14, a charging resistor 15, a discharging resistor 16, a lightning arrester 17 and a frame protection module 18.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1: referring to fig. 1-6, in an embodiment of the present invention, a high safety type subway regenerative braking energy feedback device includes a cabinet 1, wherein a hyperbaric chamber and a low-pressure chamber are disposed inside the cabinet 1, a high-voltage and high-current main circuit component is disposed in the hyperbaric chamber, and a high current passes through an electrical component, a copper bar, a cable, and the like. Low-voltage cabin places low-voltage undercurrent auxiliary control circuit components and parts, has undercurrent to pass through auxiliary power supply, relay, cable etc. simultaneously. The high-pressure cabin and the low-pressure cabin are separately arranged, so that high-pressure and low-pressure isolation can be realized, and equipment and personal safety can be ensured.
The direct current switch board hyperbaric chamber includes: the electric isolating switch, the direct current side main contactor, the charging contactor, the discharging contactor and the like are installed on the back of the cabinet, and the voltage class is DC 1500V-2000V.
DC control cabinet low-pressure cabin includes: the system comprises an auxiliary power supply module, a microcomputer control unit, an optical fiber communication module, a relay module and a wiring terminal module, wherein the voltage grades are AC220V, DC220V, DC24V, DC15V and DC 5V; the front cabinet door is provided with a human-machine interface HMI, an operation panel unit and the like, and the indicator light and the knob switch are positioned right in front of the cabinet.
The structure design of the converter cabinet: the bottom is fan cooling unit, inductance filtering unit, and the top is the power conversion module, adopts the glass fiber board to realize insulating installation between the power module and the cabinet body, guarantees high insulation withstand voltage requirement. The direct current bus capacitor and the IGBT are connected through the laminated busbar, so that stray inductance is reduced, high enough safety insulation and voltage resistance are guaranteed, and electric clearance and creepage distance are increased. Temperature sensors are independently arranged in each unit and each module, and the over-temperature protection function is achieved. The power conversion module has perfect protection functions of overvoltage, overcurrent, overtemperature and communication faults.
The system equipment has the following multiple protection functions:
(a) the cabinet door is provided with the electromagnetic lock, and when the system is electrified, the electromagnetic lock is locked, the cabinet door cannot be opened, and electric shock can be prevented.
(b) The key parts of the cabinet body are installed in an insulating mode, the auxiliary power supply module and the sensor acquisition unit are installed in an insulating mode, and isolation and voltage resistance between the auxiliary control unit and the cabinet body are improved.
(c) And an insulating protective film is arranged on the top of the direct current capacitor assembly to prevent people from touching and getting an electric shock.
(d) The microcomputer control unit, the optical fiber communication unit and the wiring terminal are provided with the insulation protection cover shell, so that the control system is prevented from being damaged by electrostatic discharge, and personnel are prevented from touching and getting an electric shock.
The multiple protection functions of the system comprise: the protection device has the functions of door interlocking protection, frame voltage and frame current protection, residual voltage discharge protection, lightning protection, surge protection, over-temperature protection and overcurrent protection. When the system works normally, the system works normally and the lamp is on; when the system fails, the system fault lamp is on; when the door of the cabinet is opened, the door opening alarm lamp is on and sends out a buzzing alarm sound.
The hardware protection is as follows: and protection functions such as direct current over-voltage and under-voltage protection, direct current over-current protection, alternating current over-voltage and under-voltage protection, alternating current over-current protection, over-temperature protection, short-circuit protection and the like. The hardware protection value is slightly higher than the software protection value, and belongs to the second-level threshold protection.
When a short circuit occurs, the hardware circuit acts quickly, short-circuit protection responds quickly, the system stops working immediately, and a direct-current side contactor and an alternating-current side breaker are disconnected, so that the fault is prevented from further expanding, and the equipment safety is guaranteed.
The main function of the electrical design realizes the control of the relay, the contactor, the electric isolating switch and the indicating lamp.
The electrical design module includes: the device comprises a relay control unit, a contactor control unit, an electric isolating switch control unit, an indicator light, a button control unit and the like.
The electric protection function:
(1) the isolating switch is switched on and off, and the electric interlocking control is adopted to realize the malfunction protection;
(2) the frame leakage protection is realized by the frame voltage relay and the frame current relay;
(3) the door interlocking switch contact signal realizes the door opening alarm action;
(4) the emergency stop button is pressed down, the system is stopped immediately, and the fault can be prevented from being enlarged.
Table 1 panel indicator light description:
| indicator light | Colour(s) | Means of |
| System normal | Green colour | The system is normal, the indicator light is on |
| Frame alarm | Red colour | After the frame voltage protection and the frame current protection, the indicator light is on |
| Door opening alarm | Red colour | After the system is electrified at high voltage, any door is opened, and the indicator light is on |
| System failure | Red colour | When the system is in fault, the indicator lamp is on |
| QS | Analog display indicator lamp | Analog display isolating switch on-off state |
| KM1 | Analog display indicator lamp | Analog display main contactor on-off state |
Table 2 panel control button description:
by adopting the design method, multiple protection and multiple protection functions of the feed equipment are realized, equipment safety and personal safety can be realized, and the realization of a high-safety design concept is ensured.
The high-voltage megawatt high-power device has the advantages that the device is particularly suitable for 1500V high-voltage megawatt high-power devices, interference between signals is reduced through isolation between strong current and weak current and isolation between high voltage and low voltage, meanwhile, the device has multiple protection functions, the safety and reliability of the device can be effectively improved, and the personal safety of device operation is improved.
Example 2: on the basis of embodiment 1, still be equipped with electromagnetic lock 8 on the cabinet body 1, the preceding cabinet door of the cabinet body 1 sets up human-machine interface HMI and operating panel unit, and pilot lamp, knob switch are located cabinet body 1 directly in front.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The utility model provides a high safe type subway regenerative braking energy feedback device, includes the cabinet body (1), a serial communication port, the inside of the cabinet body (1) is equipped with hyperbaric chamber and low-pressure cabin, hyperbaric chamber inside is equipped with direct current side electronic isolator (11), direct current side main contactor (12), direct current side charging contactor (13), direct current side discharging contactor (14), charging resistor (15), discharge resistor (16), arrester (17) and frame protection module (18), hyperbaric chamber installs at the rack back, the low-pressure cabin includes auxiliary power source (2), sensor acquisition unit (3), microcomputer control unit (4), fiber communication module (5), relay module unit (6) and wiring terminal module (7).
2. The high safety type subway regenerative braking energy feedback device as claimed in claim 1, wherein said low voltage cabin has voltage levels of AC220V, DC220V, DC24V, DC15V, DC 5V.
3. The high safety type subway regenerative braking energy feedback device as claimed in claim 1, wherein the voltage level of said high voltage cabin is DC 1500V-2000V.
4. The high safety type subway regenerative braking energy feedback device according to claim 1, characterized in that an electromagnetic lock (8) is further arranged on said cabinet body (1).
5. The high safety type subway regenerative braking energy feedback device as claimed in claim 2, wherein a front cabinet door of said cabinet body (1) is provided with a human-machine interface HMI and an operation panel unit, and an indicator light and a knob switch are located right in front of the cabinet body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020218691.3U CN211377240U (en) | 2020-02-27 | 2020-02-27 | High-safety subway regenerative braking energy feedback device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020218691.3U CN211377240U (en) | 2020-02-27 | 2020-02-27 | High-safety subway regenerative braking energy feedback device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211377240U true CN211377240U (en) | 2020-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020218691.3U Active CN211377240U (en) | 2020-02-27 | 2020-02-27 | High-safety subway regenerative braking energy feedback device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211377240U (en) |
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2020
- 2020-02-27 CN CN202020218691.3U patent/CN211377240U/en active Active
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