CN206117179U - Modularization subway energy feedback device based on cluster, parallelly connected structure - Google Patents
Modularization subway energy feedback device based on cluster, parallelly connected structure Download PDFInfo
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- CN206117179U CN206117179U CN201620968983.2U CN201620968983U CN206117179U CN 206117179 U CN206117179 U CN 206117179U CN 201620968983 U CN201620968983 U CN 201620968983U CN 206117179 U CN206117179 U CN 206117179U
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- dc750v
- phase
- transformer
- inversion
- current
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/49—Combination of the output voltage waveforms of a plurality of converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The utility model particularly relates to a modularization subway energy feedback device, for the shortcoming that can not satisfy various power grade demands in a flexible way of overcoming that prior art exists, the utility model discloses a modularization subway energy feedback device based on cluster, parallelly connected structure, the device includes: at least one DC750V contravariant module group, step up transformer, the electric energy that the feed -in direct current was touched net passes through voltage transformer and gets into DC750V contravariant module direct current side becomes the low pressure alternating current with DC conversion through DC750V contravariant module, and the low pressure alternating current is feed -in middling pressure electric wire netting after step up transformer becomes the middling pressure alternating current, DC750V contravariant module group links to each other including at least one DC750V contravariant module, the interchange output and the step up transformer of DC750V contravariant module. The utility model discloses voltage can be covered in a flexible way for DC750 or 1500V, different current level demand, and the reliability can be redundantly moved, improve.
Description
Technical field
The present invention relates to Feeding System of Urban Rail Transit technical field, and in particular to a kind of modularity subway energy feedback
Device.
Background technology
Urban rail transit in China development in recent years is very fast, and existing subway traction power supply mode adopts diode
Rectification Power Factor will press AC rectification into 1500V direct currents in 35/33kV, be touched net to the traction electric machine on subway train by direct current
Power supply.But this power supply mode can only realize unidirectional power flowing of the electric energy from electrical network to motor, and motor is in braking procedure
In be operated in Generator Status, the mechanical energy of train is converted into electric energy.In order to ensure direct current net-fault voltage in safety range, now
In the basic electric energy that train braking generation is absorbed using resistance power consumption mode, the significant wastage of electric energy is caused, what resistance was produced
Heat also add air conditioner refrigerating burden, and this has run counter to national energy-saving and has reduced discharging policy.
With the development of Power Electronic Technique, energy back feed device is gradually applied in subway.Energy feedback is filled
The ultimate principle put is that the direct current energy that motor sends is reverse into alternating current to feed back to electrical network, and such electric energy is just regenerated
Utilize, be effectively improved the utilization ratio of the energy.
Domestic some colleges and universities and enterprise have carried out beneficial research and exploration to subway energy back feed device：Traffic In Beijing is big
Learn the patent with Beijing one thousand Si Yu Electrical Co., Ltd.《A kind of energy feedback type traction power supply device with no-power compensation function and control
Method processed》Application number：201010601917.9, i.e. patent 1.The patent of Ya Pai Science and Technology Co., Ltd.《A kind of subway energy
Feedback device》, the patent No.：ZL 2,015 2 0606199.2 is that 2 two patents of patent are more representative.
On circuit structure, patent 1 is connected respectively using two DC750V three-phase half-bridge inverters DC side series connection, AC
Two groups of three-phase windings isolation of transformator are connect, by phase-shifting carrier wave 180 degree, switching frequency times yupin effect is reached.The advantage of the program
Be can compatibility DC750/1500V applications, but can not flexibly cover different current class demands, and only with single inductor filter,
Switching harmonics will pollute electrical network.Patent 2 adopts three-phase H bridge schemes, realizes times yupin effect, using three groups of independent windings of transformator
The alternate isolation needed for H bridges is realized, and adopts LCL filter, ripple pollution is little.But can not compatibility DC750/1500V application,
And equally can not flexibly cover different current class demands.
To sum up, above two scheme can not all be flexibly met various power grade demands, and no redundancy running ability, deposit
In reliability hidden danger.
The content of the invention
1st, technical problem to be solved：
In order to overcome above-mentioned technological deficiency, the present invention provide it is a kind of based on string simultaneously, the modularity subway energy that is coupled structure returns
Feedback device, the device can flexibly cover voltage for DC750 or 1500V, different current class demand, and being capable of redundancy fortune
Row, raising reliability.
2nd, technical scheme：
A kind of modularity subway energy back feed device based on series and parallel structure, the device include：At least one DC750V
Inversion module group, booster transformer；The electric energy that feed-in direct current is touched net enters the DC750V inversion modules by voltage transformer
Unidirectional current is converted into low-voltage AC by DC750V inversion modules by DC side, and the boosted transformator of low-voltage AC becomes
Feed-in medium voltage network after middle pressure alternating current, the DC750V inversion modules group include at least one DC750V inversion modules,
The ac output end of DC750V inversion modules is connected with booster transformer.
The DC750V inversion modules include 3 phase H bridge inverters, AC current transformer, inverter side filter inductance, friendship
Stream filter capacitor, DC filtering inductance, DC fuse, AC circuit breaker；Electric energy and 3 phase H bridge inversions that feed-in direct current is touched net
The input of device is connected, 3 bridge arms of phase H bridge inverter 6 all series inverter side filter inductances, the inverter side filter inductance
Outfan is connected with the input of each self-corresponding AC current transformer with respectively, the outfan of the AC current transformer
It is connected with each self-corresponding ac filter electric capacity respectively, the input phase of each filter capacitor and each corresponding AC circuit breaker
Even, the ac output end of AC circuit breaker outfan as DC750V inversion modules is connected；3 phases H of unidirectional current Jing switching frequency f
Bridge one pole frequency multiplication inversion, three-phase pulse alternating current of the output equivalent switching frequency for 2f；The pulse ac electricity is through LCL filter
Three phase sine low-voltage AC is obtained, low pressure sinusoidal ac Jing transformer boosts are into piezoelectricity in the sinusoidal ac feed-in of middle pressure
Net.
Further, the DC750V inversion modules group includes N >=1 DC750V inversion modules in parallel.In parallel
DC750V inversion module groups can apply to the circuit of different size of current.
Further, the DC750V inversion modules group is two groups, what two groups of DC750V inversion modules groups were touched net in direct current
DC side is connected.In DC side two groups of DC750V inversion module groups of series connection that direct current is touched net, the direct current of DC1500V is can apply to
Net-fault circuit.By the circuit of above-mentioned parallel connection and serial connection, the electricity of different voltages and different electric currents can be adapted to as needed
Road.
Further, the main power device of the 3 phase H bridge inverter is using full control IGBT device.
Further, the booster transformer is three-phase three-limb, and high-pressure side adopts delta connection, low-pressure side to adopt one
Group or two groups of three-phase independent windings.
Further, DC750V inversion modules input is equipped with DC fuse, and DC750V inversion modules outfan is arranged
AC circuit breaker.
When train braking, the traction electric machine on train is operated in Generator Status, and braking mechanical energy is converted into electric energy feedback
Enter direct current net-fault, into DC750V inversion modules, unidirectional current Jing DC filtering inductor filters, be input into 3 phase H bridge inverters, inversion
Device obtains the three-phase pulse alternating current that equivalent switching frequency is actual switch frequency twice using the control of one pole frequency multiplication, and the pulse is handed over
Stream electricity obtains three phase sine low-voltage AC after inverter side filter inductance, ac filter electric capacity, transformer leakage inductance filtering.
AC current transformer inside DC750V inversion modules detects the three-phase output current of inverter, carries out quick overcurrent protection；
Total output current that total output current Hall element is used for after detecting each inversion module parallel connection respectively, carries out current closed-loop
Control.Two groups of three-phase independent windings of the exchange output difference connection transformer of two groups of series connection DC750V inversion modules, transformator
High-pressure side is connected with medium voltage network using delta connection, and three-phase low-voltage alternating current Jing transformer boosts are into the alternating current feed-in of middle pressure
Medium voltage network.
3rd, beneficial effect：
（1）Different capacity demand is covered flexibly：DC750V can apply to using one group of DC750V inversion module group individually
Subway system, can apply to DC1500 subway systems using two groups of DC750V inversion modules group series connection；It is inverse in the DC750V
The DC750V inversion modules for becoming respective numbers in parallel in module group can meet different current needs.
（2）Reliability is high：Because the outfan in DC750V inversion modules arranges AC circuit breaker, when appearance parallel connection
Under DC750V inversion module failures, operating mode out of service, AC circuit breaker disconnects, and the failure DC750V inversion module is from whole
Cut off in system, other modules can't be affected to run, whole device has drop volume service ability.Also, in 3 phase H bridge inversions
6 bridge arm ac output ends of device all series filtering inductance can be prevented when circuit to be occurred when multiple DC750V inversion modules are in parallel
The situation of short circuit.
（3）Waveform quality is good：The inversion output of H bridges can directly reach the effect of 2 frequencys multiplication, and H bridges just can be real in low-pressure side
Now times yupin effect, ensure that the realizability of LCL filter to a great extent.
（4）Reduce volume, reduces cost：Output switch ripple frequency is high, amplitude is little, can reduce output LCL filter
Size, reduces cost；Grid-connected transformator be three-phase three-limb, high-pressure side delta connection two groups of three-phase independent windings of low-pressure side,
Output voltage 0.5kV.Two groups of three-phase independent windings are connected for inversion module DC side, 3 phase H bridges provide required alternate isolation,
Transformator is used as the net side inductance that inverter exports LCL filter with 6% short-circuit impedance, its leakage inductance.So, transformator one
And three duties, with voltage coupling, the alternate isolation of low-pressure side, net side filter inductance triple functions, reduce installation cost.
Description of the drawings
Fig. 1 modularity feedback device circuit topology figures,
Fig. 2 DC750V inversion module internal circuit topological diagrams.
Specific embodiment
A kind of modularity subway energy back feed device based on series and parallel structure, including：Some DC750V inversion moulds
Block, booster transformer, the electric energy that feed-in direct current is touched net enter inversion module DC side, and unidirectional current is converted into low pressure by inversion module
Alternating current, low-voltage AC Jing transformer boosts press alternating current feed-in medium voltage network into middle, wherein, DC750V inversion modules pass through
2 block coupled in series of DC side realizes DC1500V applications, meets different input current requirements by DC side parallel.
DC750V inversion modules include 3 phase H bridge inverters, AC current transformer, inverter side filter inductance, ac filter electric capacity,
DC filtering inductance, DC fuse, AC circuit breaker, ac output end are connected with transformator.Unidirectional current Jing switching frequency f's
3 phase H bridge one pole frequency multiplication inversions, three-phase pulse alternating current of the output equivalent switching frequency for 2f.The pulse ac electricity is filtered through LCL
Ripple device obtains three phase sine low-voltage AC, and low pressure sinusoidal ac Jing transformer boosts are pressed in the sinusoidal ac feed-in of middle pressure
Electrical network.Transformator is three-phase three-limb, and high-pressure side adopts delta connection, low-pressure side to adopt two groups of three-phase independent windings.
H bridge inverters output in DC750V inversion modules adopts LCL filter, inverter side filter inductance and ac filter electric capacity peace
It is mounted in inversion module, net side filter inductance is realized using transformer leakage inductance, without the need for being specially equipped with.
1,2 it is described further below in conjunction with the accompanying drawings：
When train braking, the traction electric machine on train is operated in Generator Status, and braking mechanical energy is converted into electric energy feedback
Enter direct current net-fault, subsequently into DC750V inversion modules, inversion module converts direct current into exchange, and transformator is defeated by inversion module
The low-voltage alternating-current liter for going out is pressed into middle pressure feed-in medium voltage network.All parts in circuit are as follows：
Modularity feedback device：Two groups of DC750V inversion modules DC side series connection meet DC1500V applications；Every group of DC750V
Inversion module AC and DC side is in parallel, meets different current needs.TA1, TB1, TC1 and TA2, TB2, TC2 are sampled two groups of strings respectively
Connection inversion module output total current, carries out closed-loop current control.TV1, TV2 are DC voltage Hall element, sample two respectively
The DC bus-bar voltage of group series resonant inverter module, carries out voltage stabilizing control.
DC750V inversion modules：Inverter is 3 phase H bridges, and using one pole frequency doubling technology, inverter output frequency is actual switch
2 times of frequency, and export 1/2Udc、0、-1/2UdcThree kinds of level, compare the U of common two level circuitdc、-UdcOutput, will can open
Close ripple amplitude and reduce one times.Output switch ripple frequency is high, amplitude is little, can reduce output LCL filter size, reduce into
This；Each bridge arm exchange output series filtering inductance of H bridge inverters, the circulation between suppression module parallel connection bridge arm.Work as master control
Device processed, can be, based on DSP+FPGA control chips, to detect threshold value of the direct current net-fault voltage higher than setting, by optical fiber control
The converting direct-current power into alternating-current power that H bridge inverters processed come direct current net-fault, gives transformator；CTA, CTB, CTC are alternating current
Current transformer, detects inverter three-phase output current respectively, carries out quick overcurrent protection；LA1、LA2、LB1、LB2、LC1、LC2
It is the inverter side filter inductance of 3 phase H bridge inverters respectively；CA, CB, CC are the ac filter electric capacity of every phase respectively；K1, K2 point
It is not AC circuit breaker, for overcurrent protection；F1, F2 are DC fuses, for short-circuit protection.
Transformator：The low-voltage alternating-current that inversion module is exported is boosted to into middle pressure, feed-in medium voltage network；Transformator is three-phase three
Pillar, high-pressure side delta connection, connect 35/33kV electrical networks, low-pressure side be two groups of three-phase independent windings, output voltage 0.5kV；
Two groups of three-phase independent windings are two groups of DC750V block coupled in series, 3 phase H bridges provide required alternate isolation.Transformator has 6%
Short-circuit impedance, its leakage inductance are used as the net side inductance that inverter exports LCL filter.So, one simultaneous three duties of transformator, with voltage
Coupling, the alternate isolation of low-pressure side, net side filter inductance triple functions；PT1, PT2, PT3 are AC voltage transformers, for detecting
Line voltage, provides synchronized signal to master controller and carries out voltage feed-forward control control.
Only described device is illustrated in different voltage below.
Embodiment one：
Only one of which DC750V inversion module group in circuit, the voltage that now direct current net is surveyed is 750V, and in the inversion mould
Inside block group, can be according to the size of actual current a number of DC750V inversion modules in parallel.
Embodiment two：
There are two groups of DC750V inversion module groups in circuit, two groups of inversion module groups are series connection, the voltage now shared jointly
It is for 1500V, if per group of an inversion module cannot meet current requirements, a number of according to the size parallel connection of electric current
DC750V inversion modules.
Although the present invention is disclosed as above with preferred embodiment, they are not of the invention for limiting, any ripe
This those skilled in the art is practised, without departing from the spirit and scope of the invention, can be made various changes or be retouched from working as, therefore the guarantor of the present invention
Shield scope should be by being defined that claims hereof protection domain is defined.
Claims (6)
1. a kind of modularity subway energy back feed device based on series and parallel structure, the device include：At least one DC750V is inverse
Become module group, booster transformer；It is straight that the electric energy that feed-in direct current is touched net enters the DC750V inversion modules by voltage transformer
Unidirectional current is converted into low-voltage AC by DC750V inversion modules, during the boosted transformator of low-voltage AC becomes by stream side
Feed-in medium voltage network after pressure alternating current, the DC750V inversion modules group include at least one DC750V inversion modules, DC750V
The ac output end of inversion module is connected with booster transformer；
It is characterized in that：
The DC750V inversion modules include 3 phase H bridge inverters, AC current transformer, inverter side filter inductance, exchange filter
Ripple electric capacity, DC filtering inductance, DC fuse, AC circuit breaker；Electric energy and 3 phase H bridge inverters that feed-in direct current is touched net
Input be connected, 3 bridge arms of phase H bridge inverter 6 all series inverter side filter inductances, the side filter inductance outfan with point
Be not connected with the input of each self-corresponding AC current transformer, the outfan of the AC current transformer respectively with each
Corresponding ac filter electric capacity is connected, and each filter capacitor is connected with the input of each corresponding AC circuit breaker, and exchange is disconnected
Road device outfan is the ac output end of DC750V inversion modules and is connected；The 3 phase H bridge one poles of unidirectional current Jing switching frequency f times
Frequency inversion, three-phase pulse alternating current of the output equivalent switching frequency for 2f；The pulse ac electricity obtains three-phase through LCL filter
Sinusoidal low-voltage AC, low pressure sinusoidal ac Jing transformer boosts are into middle pressure sinusoidal ac feed-in medium voltage network.
2. a kind of modularity subway energy back feed device based on series and parallel structure as claimed in claim 1, its feature exist
In：The DC750V inversion modules group includes N >=1 DC750V inversion modules in parallel.
3. a kind of modularity subway energy back feed device based on series and parallel structure as claimed in claim 2, its feature exist
In：The DC750V inversion modules group is two groups, and two groups of DC750V inversion modules groups are connected in the DC side that direct current is touched net.
4. a kind of modularity subway energy back feed device based on series and parallel structure as claimed in claim 1, its feature exist
In：The main power device of the 3 phase H bridge inverter is using full control IGBT device.
5. a kind of modularity subway energy back feed device based on series and parallel structure as claimed in claim 1, its feature exist
In：The booster transformer is three-phase three-limb, and high-pressure side adopts delta connection, low-pressure side adopt one group or two groups of three-phases it is only
Vertical winding.
6. a kind of modularity subway energy back feed device based on series and parallel structure as claimed in claim 1, its feature exist
In：DC750V inversion modules input is equipped with DC fuse, and DC750V inversion modules outfan arranges AC circuit breaker.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620968983.2U CN206117179U (en) | 2016-08-29 | 2016-08-29 | Modularization subway energy feedback device based on cluster, parallelly connected structure |
| CN201610748691.2A CN106300414B (en) | 2016-08-29 | 2016-08-29 | A kind of modularization subway energy back feed device based on series and parallel structure |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620968983.2U CN206117179U (en) | 2016-08-29 | 2016-08-29 | Modularization subway energy feedback device based on cluster, parallelly connected structure |
| CN201610748691.2A CN106300414B (en) | 2016-08-29 | 2016-08-29 | A kind of modularization subway energy back feed device based on series and parallel structure |
Publications (1)
| Publication Number | Publication Date |
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| CN206117179U true CN206117179U (en) | 2017-04-19 |
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| CN201610748691.2A Active CN106300414B (en) | 2016-08-29 | 2016-08-29 | A kind of modularization subway energy back feed device based on series and parallel structure |
| CN201620968983.2U Withdrawn - After Issue CN206117179U (en) | 2016-08-29 | 2016-08-29 | Modularization subway energy feedback device based on cluster, parallelly connected structure |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610748691.2A Active CN106300414B (en) | 2016-08-29 | 2016-08-29 | A kind of modularization subway energy back feed device based on series and parallel structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300414A (en) * | 2016-08-29 | 2017-01-04 | 南京亚派科技股份有限公司 | A kind of modularity subway energy back feed device based on series and parallel structure |
| CN107579542A (en) * | 2017-09-26 | 2018-01-12 | 华为数字技术（苏州）有限公司 | A kind of method, apparatus and system for suppressing inverter output end overvoltage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040023A (en) * | 2017-05-09 | 2017-08-11 | 南京亚派科技股份有限公司 | A kind of independent connection in series-parallel modularization subway regenerative braking super capacitor energy storage device |
| CN107888057B (en) * | 2017-12-15 | 2024-03-15 | 南京亚派科技股份有限公司 | Master-slave control system of subway energy feedback device and control method thereof |
| CN110224430A (en) * | 2019-06-11 | 2019-09-10 | 新风光电子科技股份有限公司 | A kind of DC3000V can present device and its control method |
| CN113726203B (en) * | 2020-05-22 | 2024-01-30 | 株洲中车时代电气股份有限公司 | Simplified and unified converter circuit and converter device |
| CN111572359B (en) * | 2020-05-29 | 2021-06-22 | 中车青岛四方车辆研究所有限公司 | Multi-power-supply-system regenerative energy feedback system and feedback method |
| CN111786588A (en) * | 2020-07-14 | 2020-10-16 | 南京亚派科技股份有限公司 | Subway bidirectional variable flow control device and control method based on ANPC three-level inverter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410063B (en) * | 2014-03-21 | 2016-03-23 | 南车株洲电力机车研究所有限公司 | A kind of cascade connection type unifies electric energy quality regulating system |
| CN204333980U (en) * | 2015-01-28 | 2015-05-13 | 沈阳铁道勘察设计院有限公司 | A kind of urban track traffic rectification and regenerative braking inversion feedback device |
| CN105162160B (en) * | 2015-08-13 | 2017-12-19 | 南京亚派科技股份有限公司 | A kind of closed loop control method of subway energy back feed device |
| CN105226969B (en) * | 2015-10-28 | 2018-08-10 | 宁波市轨道交通集团有限公司 | Pressure energy feedback system and its method can be presented in power supply of city railway system twin coil access type |
| CN106300414B (en) * | 2016-08-29 | 2018-11-09 | 南京亚派科技股份有限公司 | A kind of modularization subway energy back feed device based on series and parallel structure |
-
2016
- 2016-08-29 CN CN201610748691.2A patent/CN106300414B/en active Active
- 2016-08-29 CN CN201620968983.2U patent/CN206117179U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300414A (en) * | 2016-08-29 | 2017-01-04 | 南京亚派科技股份有限公司 | A kind of modularity subway energy back feed device based on series and parallel structure |
| CN106300414B (en) * | 2016-08-29 | 2018-11-09 | 南京亚派科技股份有限公司 | A kind of modularization subway energy back feed device based on series and parallel structure |
| CN107579542A (en) * | 2017-09-26 | 2018-01-12 | 华为数字技术（苏州）有限公司 | A kind of method, apparatus and system for suppressing inverter output end overvoltage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106300414B (en) | 2018-11-09 |
| CN106300414A (en) | 2017-01-04 |
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