CN110581572A - Energy absorption device and subway regenerative braking energy hybrid energy absorption equipment - Google Patents
Energy absorption device and subway regenerative braking energy hybrid energy absorption equipment Download PDFInfo
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- CN110581572A CN110581572A CN201810581182.4A CN201810581182A CN110581572A CN 110581572 A CN110581572 A CN 110581572A CN 201810581182 A CN201810581182 A CN 201810581182A CN 110581572 A CN110581572 A CN 110581572A
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 41
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 36
- 238000004146 energy storage Methods 0.000 claims abstract description 31
- 238000005265 energy consumption Methods 0.000 claims abstract description 27
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The application discloses an energy absorption device and subway regenerative braking energy hybrid energy absorption equipment, which comprise a voltage sensor, an inverter, a chopper and a chopping energy consumption resistor; when the device stops, the voltage sensor detects whether the voltage on the intermediate direct current bus exceeds a preset starting condition or not, if so, the chopping pulse of the chopper is started, and when the voltage sensor detects that the voltage on the intermediate direct current bus is lower than the preset stopping condition, the chopping pulse of the chopper is blocked; according to the chopper energy consumption resistance detection method and device, whether the voltage on the middle direct current bus meets the starting condition or the stopping condition is detected through the voltage sensor, and therefore whether the chopper pulse drives the chopper is judged, the electric energy of the respective energy storage capacitors of the inverter and the chopper is consumed on the chopper energy consumption resistance, the voltage of the middle direct current bus is reduced, discharging is completed only through the chopper energy consumption resistance, extra discharging equipment is not needed, system loss of the equipment is reduced, and the cost of the equipment is reduced.
Description
Technical Field
The invention relates to the field of rail transit, in particular to an energy absorption device and subway regenerative braking energy hybrid energy absorption equipment.
background
The urban rail transit in the 21 st century is a green traffic system pursuing energy conservation and environmental protection, the proportion of vehicle energy consumption in the whole urban rail transit system generally exceeds 50% of the energy consumption of the whole system, along with the rapid development of urban rail transit technology, various manufacturers at home and abroad increasingly research the absorption and utilization of energy generated during the braking of urban rail vehicles, and the current absorption modes of the braking energy of the urban rail transit are mainly divided into three types, namely resistance consumption type, energy storage type and inversion feedback type.
In a high-power hybrid subway energy absorption device, a large-capacity direct-current supporting capacitor needs to be arranged on the direct-current side of a power module of the device to maintain the voltage of a direct-current bus, when the device needs to be maintained or tested after being stopped, in order to avoid danger, the direct current capacitor needs to be discharged, otherwise, the electric shock danger is easy to occur during the maintenance or the repair, the current adopted discharging mode is that a large resistor R is connected in parallel on a direct current bus, but has the disadvantages of high safety withstand voltage, high cost, and the need for additional heat dissipation devices when considering the factors of insulation, withstand voltage, heat dissipation, installation method, etc. of the resistor, and in addition, because the resistor R is always in the power-on state after the device is charged on the direct current side, if the resistor is selected to be too small, in the power-on state, the loss of the system is increased, and hidden dangers such as heating are brought, so that secondary energy loss is caused by the need of increasing ventilation conditions of the device; if the resistance is selected too much, the discharge time is too long, the worker can test or maintain after the discharge is finished, the waste of human resources can be caused, and potential safety hazards exist.
therefore, in view of the above problems, it is desirable to provide an energy absorption device that can reduce system loss and cost.
Disclosure of Invention
In view of this, the present invention provides an energy absorption device and a subway regenerative braking energy hybrid energy absorption apparatus, which can reduce system loss and cost. The specific scheme is as follows:
An energy absorption device comprises a voltage sensor, an inverter, a chopper and a chopping energy consumption resistor; the voltage sensor, the inverter and the chopper are connected in parallel, the chopper and the chopping energy consumption resistor are connected in series, the inverter and the chopper respectively comprise energy storage capacitors, common ends of the voltage sensor, the inverter and the chopper are connected with a direct current power supply, the other end of the inverter is connected with an alternating current power supply, and the voltage sensor is used for detecting the energy storage capacitors of the inverter and the chopper respectively;
And blocking the pulse of the inverter after the device is stopped, wherein the voltage sensor detects whether the voltage on the intermediate direct current bus exceeds a preset starting condition, if so, the chopping pulse of the chopper is started so that the energy consumption resistor connected with the chopper consumes the energy of the energy storage capacitor, and when the voltage sensor detects that the voltage on the intermediate direct current bus is lower than a preset stopping condition, the chopping pulse of the chopper is blocked.
Optionally, the dc power supply further comprises a dc switch, and the dc switch is connected in series between the dc power supply and the common terminal; and when the device is stopped, the direct current switch disconnects a loop between the direct current power supply and the public end.
Optionally, the dc switch includes a pre-charging contactor and a shorting contactor connected in parallel.
Optionally, the method further includes:
And when the voltage sensor detects that the voltage on the middle direct current bus is lower than the stopping condition, the voltage prompting device prompts the current voltage safety of the user.
Optionally, the method further includes:
and the radiator is used for radiating the chopped wave energy dissipation resistor.
Optionally, the start condition is equal to the stop condition being a preset safe voltage.
Optionally, the safety voltage is 36V.
Optionally, the inverter is a full-bridge inverter, and includes an energy storage capacitor and three groups of fully-controlled switch device groups connected in parallel; each group of fully-controlled switch device group comprises a first fully-controlled switch device and a second fully-controlled switch device, and the output end of the first fully-controlled switch device is connected with the input end of the second fully-controlled switch device.
optionally, the chopper includes a fuse, an energy storage capacitor, a first fully-controlled switching device, and a second fully-controlled switching device; one end of the fuse is connected with the positive electrode of the direct-current power supply, the other end of the fuse and one end of the capacitor are connected with the input end of the first fully-controlled switch device, the output end of the first fully-controlled switch device is connected with the input end of the second fully-controlled switch device, and the output end of the second fully-controlled switch device and the other end of the capacitor are connected with the negative electrode of the direct-current power supply.
The invention also discloses a subway regenerative braking energy hybrid energy absorption device which comprises the direct-current bus, the first switch cabinet, the energy absorption device, the transformer, the second switch cabinet and the three-phase alternating-current power supply which are sequentially connected.
in the invention, the energy absorption device comprises a voltage sensor, an inverter, a chopper and a chopping energy consumption resistor; the voltage sensor, the inverter and the chopper are connected in parallel, the chopper is connected with the chopping energy consumption resistor in series, the inverter and the chopper respectively comprise energy storage capacitors, the common ends of the voltage sensor, the inverter and the chopper are connected with a direct current power supply, the other end of the inverter is connected with an alternating current power supply, and the voltage sensor is used for detecting the energy storage capacitors of the inverter and the chopper respectively; and when the voltage sensor detects that the voltage on the intermediate direct current bus is lower than the preset stop condition, the chopping pulse of the chopper is blocked.
the energy absorption device detects whether the voltage on the intermediate direct current bus meets the starting condition through the voltage sensor after the energy absorption device is out of operation, if so, the chopping pulse of the chopper is started, and the electric energy of the energy storage capacitors of the inverter and the chopper is consumed on the chopping energy consumption resistor, so that the voltage of the intermediate direct current bus is reduced, the test or maintenance can be performed by workers, the discharging speed is high, the discharging is completed only by the chopping energy consumption resistor, no extra discharging equipment is needed, the system loss of the equipment is reduced, and the cost of the equipment is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an energy absorption apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of another energy-absorbing device disclosed in an embodiment of the present invention;
FIG. 3 is a schematic diagram of an inverter according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a chopper disclosed in the embodiment of the invention;
FIG. 5 is a schematic structural view of a subway regenerative braking energy hybrid energy absorption device disclosed in an embodiment of the present invention;
The energy absorption device-1, the inverter 11, the chopper 12, the chopping energy consumption resistor 13, the voltage sensor 14, the direct current bus-2, the first switch cabinet-3, the transformer-4, the second switch cabinet-5 and the three-phase alternating current power supply-6 are arranged in the transformer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses an energy absorption device, which is shown in figure 1 and comprises a voltage sensor 14, an inverter 11, a chopper 12 and a chopping energy consumption resistor 13; the voltage sensor 14, the inverter 11 and the chopper 12 are connected in parallel, the chopper 12 is connected in series with the chopping energy consumption resistor 13, the inverter 11 and the chopper 12 respectively comprise energy storage capacitors (C1 and C2), the common end of the voltage sensor 14, the inverter 11 and the chopper 12 is connected with a direct current power supply, the other end of the inverter 11 is connected with an alternating current power supply, and the voltage sensor 14 is used for detecting the energy storage capacitors (C1 and C2) of the inverter 11 and the chopper 12 respectively;
After the device is stopped, the pulses of the inverter 11 and the chopper 12 are blocked, the voltage sensor 14 detects whether the voltage on the intermediate direct current bus exceeds a starting condition, if so, the chopping pulse of the chopper 12 is started, so that the energy consumption resistor connected with the chopper 12 consumes the energy of the energy storage capacitor (C1 and C2), and when the voltage sensor 14 detects that the voltage on the intermediate direct current bus is lower than the stopping condition, the chopping pulse of the chopper 12 is blocked.
In practical application, the energy absorption device can be applied to subway regenerative braking energy hybrid energy absorption equipment, the subway regenerative braking energy hybrid energy absorption equipment needs to exit an operation state, namely the equipment needs to be stopped, after the equipment is stopped, the pulse of the inverter 11 is cut off, whether the voltage on the intermediate direct current bus exceeds a starting condition is detected according to the voltage sensor 14, namely whether the voltage in the energy storage capacitors (C1 and C2) of the inverter 11 and the chopper 12 exceeds the starting condition is detected, if yes, the chopping pulse of the chopper 12 is started, a loop of the energy storage capacitors (C1 and C2) of the inverter 11 and the chopper 12 and the chopper energy consumption resistor 13 is established, so that the electric energy in the two energy storage capacitors (C1 and C2) can be consumed through the chopper energy consumption resistor 13, the voltages in the two energy storage capacitors (C1 and C2) are reduced, and the voltage on the intermediate direct current bus is reduced, and (3) blocking the chopping pulse of the chopper 12 until the voltage sensor 14 detects that the voltage on the intermediate direct-current bus is lower than a stop threshold value, further completing the release of the intermediate direct-current bus voltage, and enabling the intermediate direct-current bus voltage to meet a preset stop condition so as to facilitate the test or maintenance of the circuit by maintenance personnel.
For example, the start condition is 230V or more and the stop condition is 36V or less, and whether or not the voltage on the intermediate dc bus exceeds 230V is detected by the voltage sensor 14 to determine whether or not to start the chopping pulse of the chopper 12, and whether or not to stop the chopping pulse of the chopper 12 is determined by whether or not the voltage on the intermediate dc bus is 36V or less is detected by the voltage sensor 14.
It can be seen that in the embodiment of the present invention, after the energy absorption device exits from operation, the voltage sensor 14 detects whether the voltage on the intermediate dc bus meets the start condition, and if yes, the chopping pulse of the chopper 12 is started, so that the electric energy of the energy storage capacitors (C1 and C2) of the inverter 11 and the chopper 12 is consumed by the chopping energy consumption resistor 13, thereby reducing the voltage of the intermediate dc bus, further enabling a worker to perform testing or maintenance, having a fast discharge speed, completing discharge only by using the chopping energy consumption resistor 13, and requiring no additional discharge equipment, reducing the system loss of the equipment, and reducing the cost of the equipment.
the embodiment of the invention discloses a specific energy absorption device, and compared with the previous embodiment, the technical scheme is further explained and optimized in the embodiment. Referring to fig. 2, specifically:
In practical applications, the energy absorption device may further include a dc switch, and the dc switch is connected in series between the dc power supply and the common terminal; when the device is stopped, the direct current switch disconnects a loop between the direct current power supply and the public end.
Further, the direct current switch can also comprise a pre-charging contactor and a short-circuit contactor which are connected in parallel with each other.
The direct-current switch is connected in series on a positive line of the middle direct-current bus, when the direct-current switch works normally, the pre-charging contactor is closed firstly, so that respective energy storage capacitors (C1 and C2) of the inverter 11 and the chopper 12 can be charged, the voltage of the middle direct-current bus is stabilized, after the pre-charging of the energy storage capacitors (C1 and C2) is completed, the pre-charging contactor is disconnected, the short-circuit contactor is closed, normal operation is achieved, and after the device stops, the short-circuit contactor is disconnected, disconnected with the direct-current bus and separated from the direct-current side.
specifically, in order to set the starting condition and the stopping condition conveniently, and simultaneously avoid the situation that the voltage on the intermediate dc bus cannot meet the starting condition but is higher than the stopping condition, the starting condition is equal to the stopping condition being a preset voltage threshold, for example, the starting condition is equal to the stopping condition being 36V, the starting condition is met when the intermediate dc bus voltage is greater than the preset voltage threshold 36V, and the stopping condition is met when the intermediate dc bus voltage is less than or equal to the preset voltage threshold 36V.
Specifically, referring to fig. 3, the inverter 11 may be a full-bridge inverter, and includes an energy storage capacitor C1 and three fully-controlled switch device groups 111 connected in parallel; each group of fully-controlled switch device groups 111 includes a first fully-controlled switch device G1 and a second fully-controlled switch device G2, an output terminal of the first fully-controlled switch device G1 is connected to an input terminal of the second fully-controlled switch device G2, a common terminal of the first fully-controlled switch device G1 and the second fully-controlled switch device G2 is connected to an ac side (A, B or C), an input terminal of the first fully-controlled switch device G1 is connected to an anode P of a dc power supply, and an output terminal of the second fully-controlled switch device G2 is connected to a cathode N of the dc power supply.
Specifically, referring to fig. 4, the chopper 12 may include a fuse FU, an energy storage capacitor C2, a first fully-controlled switching device G3, and a second fully-controlled switching device G4; one end of fuse FU links to each other with DC power supply's anodal P, fuse FU's the other end, energy storage capacitor C2's one end links to each other with first full accuse type switching device G3's input, first full accuse type switching device G3's output links to each other with second full accuse type switching device G4's input, second full accuse type switching device G4's output, energy storage capacitor C2's the other end links to each other with DC power supply's negative pole N, second full accuse type switching device G4 is parallelly connected with outside chopping power consumption resistance 13.
In an embodiment of the present invention, the energy absorption apparatus may further include:
with the voltage prompt device that voltage sensor is connected, work as voltage sensor detects voltage on the middle direct current bus is higher than the stop condition, then voltage prompt device suggestion user's present voltage is high, work as voltage sensor detects voltage on the middle direct current bus is less than the stop condition, then voltage prompt device suggestion user's present voltage safety makes the user can audio-visually grasp through voltage prompt device whether safe on the middle direct current bus, avoids discharging the accident that incompletely causes.
For example, when the voltage sensor detects that the voltage on the intermediate dc bus is higher than the stop condition, the high-voltage indicator lamp in the voltage indicator device may be controlled to be normally on, for example, a normally-on red lamp, so as to indicate to the user that the current voltage is high; when the voltage sensor detects that the voltage on the middle direct current bus is lower than the stop condition, the safety prompting lamp in the voltage prompting device can be controlled to be normally on, for example, a normally-on green lamp is used for prompting the current voltage safety of a user, and maintenance can be carried out.
It can be understood that the chopping energy consumption resistor generates heat when consuming energy, and in order to prevent the device from being damaged due to overheating, the chopping energy consumption resistor can further comprise a radiator for radiating heat of the chopping energy consumption resistor; the radiator can be a cooling device such as an exhaust fan or an air conditioner.
The embodiment of the invention also discloses a subway regenerative braking energy hybrid energy absorption device, and as shown in fig. 3, the circuit comprises a direct current bus 2, a first switch cabinet 3, an energy absorption device 1, a transformer 4, a second switch cabinet 5 and a three-phase alternating current power supply 6 which are connected in sequence.
Specifically, after the subway regenerative braking energy hybrid energy absorption equipment exits from operation, the energy absorption device 1 closes the pulse of the inverter 11, then switches off the circuit breakers in the first switch cabinet 3 and the second switch cabinet 5, and disconnects the short-circuit contactor in the direct current switch cabinet, at this time, the voltage sensor 14 detects the voltage of the intermediate direct current bus, judges whether the starting condition is met, if so, the chopper pulse of the chopper 12 cabinet is started, the resistor cabinet is connected into a circuit, the electric energy of the respective energy storage capacitors (C1 and C2) of the chopper 12 cabinet and the inverter cabinet is consumed until the stopping condition is met, the pulse of the chopper 12 is blocked, the discharge of the two energy storage capacitors (C1 and C2) is completed, and the voltage of the intermediate direct current bus is under safe voltage for maintenance or test of a maintenance worker.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
the energy absorption device and the subway regenerative braking energy hybrid energy absorption equipment provided by the invention are described in detail, specific examples are applied in the description to explain the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. an energy absorption device is characterized by comprising a voltage sensor, an inverter, a chopper and a chopping energy consumption resistor; the voltage sensor, the inverter and the chopper are connected in parallel, the chopper and the chopping energy consumption resistor are connected in series, the inverter and the chopper respectively comprise energy storage capacitors, common ends of the voltage sensor, the inverter and the chopper are connected with a direct current power supply, the other end of the inverter is connected with an alternating current power supply, and the voltage sensor is used for detecting the energy storage capacitors of the inverter and the chopper respectively;
And after the device is stopped, blocking pulses of the inverter and the chopper, detecting whether the voltage on the intermediate direct current bus exceeds a preset starting condition by the voltage sensor, if so, starting the chopping pulse of the chopper so that the energy consumption resistor connected with the chopper consumes the energy of the energy storage capacitor, and blocking the chopping pulse of the chopper when detecting that the voltage on the intermediate direct current bus is lower than a preset stopping condition by the voltage sensor.
2. the energy absorbing device of claim 1, further comprising a dc switch connected in series between the dc power source and the common terminal; and when the device is stopped, the direct current switch disconnects a loop between the direct current power supply and the public end.
3. The energy absorbing device of claim 1, wherein the dc switch comprises a pre-charge contact and a shorting contact in parallel with each other.
4. The energy absorbing device of claim 1, further comprising:
And when the voltage sensor detects that the voltage on the middle direct current bus is lower than the stopping condition, the voltage prompting device prompts the current voltage safety of the user.
5. The energy absorbing device of claim 1, further comprising:
and the radiator is used for radiating the chopped wave energy dissipation resistor.
6. The energy absorbing device of claim 1, wherein the start condition is equal to the stop condition being a preset safe voltage.
7. The energy absorbing device of claim 4, wherein the safe voltage is 36V.
8. The energy absorption device according to any one of claims 1 to 7, wherein the inverter is a full-bridge inverter, and comprises an energy storage capacitor and three groups of fully-controlled switch device groups which are connected in parallel; each group of fully-controlled switch device group comprises a first fully-controlled switch device and a second fully-controlled switch device, and the output end of the first fully-controlled switch device is connected with the input end of the second fully-controlled switch device.
9. An energy absorbing device according to any one of claims 1 to 7, wherein the chopper comprises a fuse, an energy storage capacitor, a first fully controlled switching device and a second fully controlled switching device; one end of the fuse is connected with the positive electrode of the direct-current power supply, the other end of the fuse and one end of the capacitor are connected with the input end of the first fully-controlled switch device, the output end of the first fully-controlled switch device is connected with the input end of the second fully-controlled switch device, and the output end of the second fully-controlled switch device and the other end of the capacitor are connected with the negative electrode of the direct-current power supply.
10. A subway regenerative braking energy hybrid energy absorption device is characterized by comprising a direct current bus, a first switch cabinet, the energy absorption device as claimed in any one of claims 1 to 9, a transformer, a second switch cabinet and a three-phase alternating current power supply which are connected in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810581182.4A CN110581572A (en) | 2018-06-07 | 2018-06-07 | Energy absorption device and subway regenerative braking energy hybrid energy absorption equipment |
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| CN201810581182.4A CN110581572A (en) | 2018-06-07 | 2018-06-07 | Energy absorption device and subway regenerative braking energy hybrid energy absorption equipment |
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| CN110581572A true CN110581572A (en) | 2019-12-17 |
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| CN201810581182.4A Pending CN110581572A (en) | 2018-06-07 | 2018-06-07 | Energy absorption device and subway regenerative braking energy hybrid energy absorption equipment |
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| CN112421939A (en) * | 2020-10-13 | 2021-02-26 | 珠海格力电器股份有限公司 | Charge leakage circuit, converter, centrifugal unit and electric appliance |
| CN113014078A (en) * | 2021-04-21 | 2021-06-22 | 重庆中车长客轨道车辆有限公司 | Energy absorption method for a rail vehicle |
| CN113014078B (en) * | 2021-04-21 | 2022-02-15 | 重庆中车长客轨道车辆有限公司 | Energy absorption method for a rail vehicle |
| CN114221422A (en) * | 2022-02-18 | 2022-03-22 | 宁德时代新能源科技股份有限公司 | Battery pack charging system, control method, control device, battery pack charging unit, and storage medium |
| CN114221422B (en) * | 2022-02-18 | 2022-07-15 | 宁德时代新能源科技股份有限公司 | Battery pack charging system, control method, control device, battery pack charging unit, and storage medium |
| WO2023155346A1 (en) * | 2022-02-18 | 2023-08-24 | 宁德时代新能源科技股份有限公司 | Battery pack charging system, control method therefor, apparatus, unit, and storage medium |
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Application publication date: 20191217 |