CN207625308U - A kind of bidirectional current transformer of super capacitor energy-storage - Google Patents
A kind of bidirectional current transformer of super capacitor energy-storage Download PDFInfo
- Publication number
- CN207625308U CN207625308U CN201721171243.7U CN201721171243U CN207625308U CN 207625308 U CN207625308 U CN 207625308U CN 201721171243 U CN201721171243 U CN 201721171243U CN 207625308 U CN207625308 U CN 207625308U
- Authority
- CN
- China
- Prior art keywords
- current transformer
- bidirectional current
- capacitor
- super capacitor
- energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model belongs to super capacitor field more particularly to a kind of bidirectional current transformer of super capacitor energy-storage.Described device includes switchgear, bidirectional current transformer and super capacitor, it is characterized in that, the switchgear and by cable connection to contact net, bidirectional current transformer is connected on the lower mouth of switchgear and super capacitor with cable, and super capacitor is connected on the outlet side of bidirectional current transformer.The bidirectional current transformer uses the three-level topology with striding capacitance, including the busbar Support Capacitor of multiple parallel connections, multiple equalizing resistances, multiple striding capacitances, multiple independent IGBT modules and multiple super-capacitor modules.The utility model can preferably absorb the overbump energy that the operation that rail electric locomotive is frequently braked is brought, and when locomotive starts, and in the energy feedback to contact net of storage, energy is provided for locomotive, to reach energy-efficient purpose.
Description
Technical field
The utility model belongs to super capacitor field more particularly to a kind of bidirectional current transformer of super capacitor energy-storage.
Background technology
As fossil resources are increasingly reduced, the energy and environmental crisis increasingly threaten the survival and development of the mankind, the energy by
Gradually become a kind of scarce resource, how to remove the emphasis for carrying out energy-saving and emission-reduction consumption reduction as concern.With current power electronics skill
The rapid development of art, current transformer have been widely used in various energy storage devices, and because super capacitor has extended cycle life,
The characteristics such as power density is big, are widely used in energy storage device.
Rail traffic is being greatly developed in big city at present, and subway just becomes the most important vehicles in city, track
Electric locomotive is connected directly between on contact net.Locomotive is easy to generate surge voltage to contact net, in order to ensure in braking process
Equipment safety, this part impact is general all by resistance absorption, and energy is wasted.Because the distance between each website compared with
It is short, the frequent start-stop of locomotive is caused, a large amount of energy expenditure can be caused by all falling by resistance absorption.The characteristics of super capacitor
Have：It has extended cycle life, charge and discharge cycles number is up to 500,000 times or more；Power density is big, is approximately 20 times of lead-acid battery, in short-term
Between high-power charging and discharging capabilities it is strong；Charge/discharge rates are fast, efficient.And the characteristics of urban track traffic is section run time
Short, start and stop are frequent, and short time due to voltage spikes is apparent.So the characteristic of super capacitor meets the need of urban track traffic energy storage just
It asks, there is better performance matching and higher cost performance than other energy storage modes.
Utility model content
For the problems in background technology, the utility model provides a kind of bidirectional current transformer of super capacitor energy-storage,
The overbump energy that the operation that rail electric locomotive is frequently braked is brought can be preferably absorbed, and when locomotive starts, will be stored up
In the energy feedback to contact net deposited, energy is provided for locomotive, to reach energy-efficient purpose.
To achieve the goals above, the utility model proposes following technical solutions：
A kind of bidirectional current transformer of super capacitor energy-storage, described device include switchgear, bidirectional current transformer and super
Capacitance, which is characterized in that the switchgear is connected on switchgear by cable connection to contact net, bidirectional current transformer by cable
Lower mouth, super capacitor is connected on the outlet side of bidirectional current transformer；
The bidirectional current transformer uses the three-level topology with striding capacitance, includes the busbar support electricity of multiple parallel connections
Appearance, multiple equalizing resistances, multiple striding capacitances, multiple independent IGBT modules；
The equalizing resistance is connected on busbar Support Capacitor both ends and is acted on as pressure respectively, and the IGBT module is connected respectively
The both ends of busbar Support Capacitor are connected on, the striding capacitance is added between the midpoint of two IGBT modules, the both ends of striding capacitance
One group of diode and resistance are connect respectively.
Further, the bidirectional current transformer includes the first busbar Support Capacitor (C1), the second busbar Support Capacitor
(C2), the first equalizing resistance (R1), the second equalizing resistance (R2), striding capacitance (C3), the first IGBT module (T1 T2), second
IGBT module (T3 T4), flat wave inductance (L) and super-capacitor module (C4)；
The first busbar Support Capacitor (C1) and the second busbar Support Capacitor (C2) are in parallel, the first equalizing resistance (R1) and
Second equalizing resistance (R2) is connected on two capacitance both ends and is acted on as pressure respectively, the first IGBT modules (T1 T2) and second
IGBT module (T3 T4) is respectively that two independent IGBT modules distinguish series connections in the first busbar Support Capacitor (C1) and second
The both ends of busbar Support Capacitor (C2), striding capacitance (C3) are added between the midpoint of two IGBT modules, striding capacitance (C3) two
End connects one group of diode and resistance respectively, their midpoint again with the first busbar Support Capacitor (C1) and the second busbar Support Capacitor
(C2) midpoint links together.
Further, the bidirectional current transformer further includes first switch pipe (T1), second switch pipe (T2), third switch
Manage (T3) and the 4th switching tube (T4)；When normal work, first switch pipe (T1) and second switch pipe (T2), third switching tube
(T3) it staggeredly works with the 4th switching tube (T4), driving pulse differs 180 °；First switch pipe (T1) and the 4th switching tube (T4)
Complementation, second switch pipe (T2) are complementary with third switching tube (T3).
Further, when the bidirectional current transformer charges and discharges super capacitor, it is divided into BUCK charging circuits
With BOOST discharge circuits；Its circuit be three level BUCK charging circuits when, be operated in charge mode, from DC bus be depressured to
Super capacitor charges, and circuit is three level BOOST discharge circuits, is operated in discharge mode, and super capacitor boosts to be mended to busbar
Charging stream.
Further, 0.5 both of which of D ＞ 0.5 and D ＜ is divided into according to the duty ratio of switching tube, when Bidirectional variable-flow fills
When setting work charge mode, when the voltage Vc4/Vdc ＞ 0.5 of super-capacitor module (C4), the duty ratio D ＞ 0.5 of T1 and T2,
The duty ratio D ＜ 0.5 of corresponding T3 and T4, bidirectional current transformer is operated in the pattern of BUCK pattern D ＞ 0.5 under this pattern
Under, as the working condition when working condition of bidirectional current transformer is operated in the duty ratio D ＜ 0.5 of BOOST with it at this time,
Output current at this time is opposite.
When the duty ratio D ＞ 0.5 of the duty ratio D ＜ 0.5 and BOOST of BUCK, bidirectional current transformer under both patterns
Working condition is the same, and current direction is opposite.
The beneficial effects of the utility model are：
The utility model is related to a kind of bidirectional current transformer of super capacitor energy-storage, be embodied in contact net have it is extra
When energy or impact, this part energy is stored in super capacitor by bidirectional current transformer；When contact net needs
When energy, then will be in the energy feedback to contact net that stored in super capacitor by bidirectional current transformer.The utility model
A kind of bidirectional current transformer of the super capacitor energy-storage provided is made of switchgear, bidirectional current transformer and super capacitor, is both saved
The about energy, also ensures the safety of electrical equipment, can absorb overvoltage in locomotive brake and impacted to power grid, same to opportunity
When vehicle starts, can say energy feedback to power grid, avoid damage of the overvoltage to electrical equipment, energy also can regeneration,
The energy is saved.
Description of the drawings
Fig. 1 is the plant system drawing of the utility model.
Fig. 2 is the utility model bidirectional current transformer circuit topology figure.
Fig. 3 is that the utility model bidirectional current transformer is operated in the duty ratio D ＞ 0.5 of BUCK or is operated in accounting for for BOOST
The working condition and current waveform of sky ratio D ＜ 0.5.
Fig. 4 is that the utility model bidirectional current transformer is operated in the duty ratio D ＜ 0.5 of BUCK or is operated in accounting for for BOOST
The working condition and current waveform of sky ratio D ＞ 0.5.
Specific implementation mode
Below in conjunction with the accompanying drawings, detailed elaboration is made to the specific embodiment of the utility model.Specific implementation mode only supplies
It describes and is not used for limiting the scope of the utility model or implementation principle, the scope of protection of the utility model is still with claim
Subject to, including obvious changes or variations etc. made on this basis.
The utility model is related to a kind of bidirectional current transformers of super capacitor energy-storage, when bidirectional current transformer passes through the company of switch
After connecing contact net, in track locomotive brake, impact can be generated to DC bus-bar voltage, bidirectional current transformer detects that voltage arrives
After, it charges to super capacitor, sponged extra energy.When rail locomotive starts, bidirectional current transformer again will
In the energy feedback to contact net of super capacitor storage, needed for locomotive.
The system block diagram of the utility model is as shown in Figure 1, direct-current switch cabinet and pass through cable connection to contact net, two-way change
Stream device is connected on the lower mouth of direct-current switch cabinet sum with cable, and super capacitor is connected on the outlet side of bidirectional current transformer.
Bidirectional current transformer in the utility model is used such as the three-level topology with striding capacitance in Fig. 2.
In Fig. 2, C1, C2 are busbar Support Capacitor, and R1, R2 are equalizing resistance, and C3 is striding capacitance, T1 T2 and T3 T4 be respectively
Two independent IGBT modules, C3 are striding capacitance, and L is flat wave inductance, and C4 is super-capacitor module.Two busbar branch of C1, C2
It is in parallel to support capacitance, resistance R1, R2 are connected on two capacitance both ends and are acted on as pressure respectively, T1 T2 and T3 T4 be respectively two solely
Vertical IGBT module distinguishes series connection at the both ends of busbar Support Capacitor C1, C2, and striding capacitance C3 is added in two IGBT modules
Between midpoint, the both ends striding capacitance C3 connect one group of diode and resistance respectively, D1 R3 and D2 R4, their midpoint again with busbar
The midpoint of Support Capacitor C1, C2 link together.Compared with traditional NPC1 type tri-level circuits, two diodes are saved,
Has the advantages that three level power generation roads topology simultaneously.
It is energy storage and Releasing loop, including super capacitor and bidirectional current transformer in Fig. 1.This two parts leads to respectively
It crosses a switchgear and is connected to DC grid.
In Fig. 2, it is the work topological structure of bidirectional current transformer, is a three-level structure containing striding capacitance, makes
With striding capacitance instead of two neutral-point-clamped diodes of traditional three level, the cost for not only saving two diodes also has
The advantage of tri-level circuit.T1, T2, T3, T4 are 4 switching tubes, and when normal work, T1 and T2, T3 and T4 staggeredly work, drive
Moving pulse differs 180 °, and in addition T1 and T4 is complementary, and T2 and T3 is complementary.Bidirectional current transformer is charged and is put to super capacitor
When electric, since the direction of electric current transmission is different, BUCK charging circuits and BOOST discharge circuits can be divided into.Its circuit is three electricity
When flat BUCK reduction voltage circuits, it is operated in charge mode, is depressured from DC bus and charges to super capacitor, circuit is three level
BOOST booster circuits are operated in discharge mode, and super capacitor, which boosts, gives busbar supplemental current.
In powered on moment, electric current is charged to striding capacitance, is filled by switch transistor T 1, T4, diode D1, D2, resistance R3, R4
By the switching logic (at this time T2, T3 turn off) that controls T1, T4 to stablize striding capacitance voltage after the completion of electricity, make it remain to be
The half of system vertical compression.
0.5 both of which of D ＞ 0.5 and D ＜ can be divided into according to the duty ratio of switching tube, when bidirectional current transformer works
When charge mode, when the voltage Vc4/Vdc ＞ 0.5 of super capacitor C4, duty ratio D ＞ 0.5, corresponding T3 and the T4's of T1 and T2
Duty ratio D ＜ 0.5, bidirectional current transformer is operated under the pattern of BUCK pattern D ＞ 0.5 under this pattern, at this time Bidirectional variable-flow
The working condition when working condition of device is operated in the duty ratio D ＜ 0.5 of BOOST with it is the same, only at this time defeated
It is opposite to go out electric current, such as the electric current of BUCK circuits and BOOST circuits in Fig. 3.
Similarly, when the duty ratio D ＞ 0.5 of the duty ratio D ＜ 0.5 and BOOST of BUCK, Bidirectional variable-flow fills under both patterns
The working condition set be it is the same, current direction be it is opposite, as shown in Figure 4.
Claims (5)
1. a kind of bidirectional current transformer of super capacitor energy-storage, described device includes switchgear, bidirectional current transformer and super electricity
Hold, which is characterized in that the switchgear is connected on switchgear by cable connection to contact net, bidirectional current transformer by cable
Lower mouth, super capacitor are connected on the outlet side of bidirectional current transformer；
The bidirectional current transformer use with striding capacitance three-level topology, including the busbar Support Capacitor of multiple parallel connections,
Multiple equalizing resistances, multiple striding capacitances, multiple independent IGBT modules；
The equalizing resistance is connected on busbar Support Capacitor both ends and is acted on as pressure respectively, and the IGBT module difference series connection exists
The both ends of busbar Support Capacitor, the striding capacitance are added between the midpoint of two IGBT modules, the both ends difference of striding capacitance
Connect one group of diode and resistance.
2. a kind of bidirectional current transformer of super capacitor energy-storage according to claim 1, it is characterised in that：
The bidirectional current transformer includes the first busbar Support Capacitor (C1), the second busbar Support Capacitor (C2), the first equal piezoelectricity
Hinder (R1), the second equalizing resistance (R2), striding capacitance (C3), the first IGBT module (T1 T2), the second IGBT module (T3 T4),
Flat wave inductance (L) and super-capacitor module (C4)；
The first busbar Support Capacitor (C1) and the second busbar Support Capacitor (C2) are in parallel, the first equalizing resistance (R1) and second
Equalizing resistance (R2) is connected on two capacitance both ends and is acted on as pressure respectively, the first IGBT module (T1 T2) and the 2nd IGBT moulds
Block (T3 T4) is respectively that two independent IGBT modules distinguish series connections in the first busbar Support Capacitor (C1) and the second busbar branch
The both ends of capacitance (C2) are supportted, striding capacitance (C3) is added between the midpoint of two IGBT modules, the both ends striding capacitance (C3) difference
Connect one group of diode and resistance, their midpoint again with the first busbar Support Capacitor (C1) and the second busbar Support Capacitor (C2)
Midpoint links together.
3. a kind of bidirectional current transformer of super capacitor energy-storage according to claim 1, it is characterised in that：
The bidirectional current transformer further includes first switch pipe (T1), second switch pipe (T2), third switching tube (T3) and the 4th
Switching tube (T4)；When normal work, first switch pipe (T1) and second switch pipe (T2), third switching tube (T3) are switched with the 4th
It manages (T4) staggeredly to work, driving pulse differs 180 °；First switch pipe (T1) is complementary with the 4th switching tube (T4), second switch pipe
(T2) complementary with third switching tube (T3).
4. a kind of bidirectional current transformer of super capacitor energy-storage according to claim 1, it is characterised in that：
When the bidirectional current transformer charges and discharges super capacitor, it is divided into BUCK charging circuits and BOOST electric discharge electricity
Road；When its circuit is three level BUCK charging circuits, it is operated in charge mode, is depressured from DC bus and charges to super capacitor,
Its circuit is three level BOOST discharge circuits, is operated in discharge mode, super capacitor, which boosts, gives busbar supplemental current.
5. a kind of bidirectional current transformer of super capacitor energy-storage according to claim 4, it is characterised in that：
0.5 both of which of D ＞ 0.5 and D ＜ is divided into according to the duty ratio of switching tube, when bidirectional current transformer work charge mode
When, when the voltage Vc4/Vdc ＞ 0.5 of super-capacitor module (C4), duty ratio D ＞ 0.5, corresponding T3 and the T4's of T1 and T2 accounts for
Sky ratio D ＜ 0.5, bidirectional current transformer is operated under the pattern of BUCK pattern D ＞ 0.5 under this pattern, and Bidirectional variable-flow fills at this time
As working condition when the working condition set is operated in the duty ratio D ＜ 0.5 of BOOST with it, output current at this time is phase
Anti-；
When the duty ratio D ＞ 0.5 of the duty ratio D ＜ 0.5 and BOOST of BUCK, the work of bidirectional current transformer under both patterns
State is the same, and current direction is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721171243.7U CN207625308U (en) | 2017-09-13 | 2017-09-13 | A kind of bidirectional current transformer of super capacitor energy-storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721171243.7U CN207625308U (en) | 2017-09-13 | 2017-09-13 | A kind of bidirectional current transformer of super capacitor energy-storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207625308U true CN207625308U (en) | 2018-07-17 |
Family
ID=62818200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721171243.7U Active CN207625308U (en) | 2017-09-13 | 2017-09-13 | A kind of bidirectional current transformer of super capacitor energy-storage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207625308U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111262429A (en) * | 2020-03-17 | 2020-06-09 | 阳光电源股份有限公司 | Direct current conversion circuit and photovoltaic inverter |
| WO2021120220A1 (en) * | 2019-12-20 | 2021-06-24 | 华为技术有限公司 | Direct-current transformer |
| CN114640253A (en) * | 2022-03-24 | 2022-06-17 | 苏州罗约科技有限公司 | Hybrid three-level flying capacitor Boost circuit |
| CN115001264A (en) * | 2022-06-07 | 2022-09-02 | 漳州科华电气技术有限公司 | Direct current conversion circuit, control method and control terminal |
-
2017
- 2017-09-13 CN CN201721171243.7U patent/CN207625308U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021120220A1 (en) * | 2019-12-20 | 2021-06-24 | 华为技术有限公司 | Direct-current transformer |
| CN113287253A (en) * | 2019-12-20 | 2021-08-20 | 华为技术有限公司 | Direct current converter |
| EP3961896A4 (en) * | 2019-12-20 | 2022-07-13 | Huawei Digital Power Technologies Co., Ltd. | Direct-current transformer |
| US11870346B2 (en) | 2019-12-20 | 2024-01-09 | Huawei Digital Power Technologies Co., Ltd. | DC-DC converter |
| CN111262429A (en) * | 2020-03-17 | 2020-06-09 | 阳光电源股份有限公司 | Direct current conversion circuit and photovoltaic inverter |
| CN114640253A (en) * | 2022-03-24 | 2022-06-17 | 苏州罗约科技有限公司 | Hybrid three-level flying capacitor Boost circuit |
| CN115001264A (en) * | 2022-06-07 | 2022-09-02 | 漳州科华电气技术有限公司 | Direct current conversion circuit, control method and control terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207625308U (en) | A kind of bidirectional current transformer of super capacitor energy-storage | |
| CN106655440B (en) | The method of the super capacitor and accumulator hybrid energy-storing system and energy absorption and release of two-stage series connection | |
| CN103311950B (en) | City railway train regenerating braking energy absorbs system and method | |
| CN102616145B (en) | Regenerative braking energy storage device for electric automobile | |
| KR20200088899A (en) | Method and system of arrangement of urban railway traffic regenerative braking energy recovery device | |
| CN100581869C (en) | Multi-target comprehensive control energy-saving device for subway power supply system | |
| CN106276445A (en) | A kind of elevator drives control, energy saving integrated system and method | |
| CN206595914U (en) | Elevator energy conversion control device | |
| CN102651554B (en) | Control method and device for accessing energy-storage photovoltaic system into urban rail traction network | |
| CN104135055B (en) | A kind of engineering truck traction charging set | |
| CN106427616B (en) | A kind of composite power source based on charge pump and its switching method in different operating modes | |
| CN106329572A (en) | Hybrid energy storage converter device and control method | |
| CN204687864U (en) | A kind of new city Rail Transit System | |
| CN204376517U (en) | A kind of bidirectional DC-DC converter for direct current network energy storage | |
| CN103904736B (en) | Electric voltage equalization type super capacitor energy storage device | |
| CN206149004U (en) | Track electric locomotive can regenerate energy absorption and storage device | |
| CN108448602A (en) | Urban track traffic regenerating braking energy energy conserving system | |
| CN111740438A (en) | Urban rail transit regenerative braking energy management and control system and control method thereof | |
| CN105827109B (en) | A kind of redundant direct current translation circuit and its control method | |
| CN206465785U (en) | A kind of vehicle mounted rail traffic brake energy feedback system based on novel energy storage apparatus | |
| CN109768721A (en) | A kind of three-level current transformer control method of intelligence energy in bidirectional flow | |
| CN112953235A (en) | High-power isolated multi-module parallel charging power supply for super-capacitor bus | |
| CN205847086U (en) | A kind of switching capacity type high-gain quasi-Z source DC DC changer | |
| CN209600281U (en) | Regenerating braking energy blended absorbent device applied to electric car | |
| CN206834780U (en) | A kind of independent connection in series-parallel modularization subway regenerative braking super capacitor energy storage device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |