CN106505887A - A kind of DC power-supply system - Google Patents
A kind of DC power-supply system Download PDFInfo
- Publication number
- CN106505887A CN106505887A CN201611260401.6A CN201611260401A CN106505887A CN 106505887 A CN106505887 A CN 106505887A CN 201611260401 A CN201611260401 A CN 201611260401A CN 106505887 A CN106505887 A CN 106505887A
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- Prior art keywords
- igbt
- electric capacity
- emitter stage
- power model
- colelctor electrode
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- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
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Abstract
The invention discloses a kind of DC power-supply system, including transformer, the first alternating-current switch, pre-charge resistance, the second alternating-current switch, three-phase inversion bridge circuit, dc switch, control device, AC voltage sensor, direct current voltage sensor and DC current sensor, three-phase inversion bridge circuit each half bridge arm includes AC current sensor, single-phase reactor and the power model that connects.When near-end or far end short occurs in back end DC electrical network, the diode cut-off in IGBT can be controlled, it is to avoid the damage of power device and miscellaneous equipment, system reliability and safe.
Description
Technical field
The present invention relates to power supply of urban orbit traffic technical field, more particularly to a kind of DC power-supply system.
Background technology
The DC power-supply system of urban track traffic at present is generally adopted by based on the general of high power device IGBT compositions
Logical Three-Phase PWM Rectifier electric power system, in the system, when near-end or far end short occurs in DC traction electrical network, in IGBT
Diode is in the conduction state, due to the short circuit current flow tolerance of IGBT device less, therefore easily cause power device with
And the damage of miscellaneous equipment, it is impossible to meet urban track traffic tractive power supply system high reliability, the requirement of high safety grade.
Therefore, how to provide a kind of high DC power-supply system of reliability is that those skilled in the art need to solve at present
Problem.
Content of the invention
It is an object of the invention to provide a kind of DC power-supply system, when near-end or far end short occurs in back end DC electrical network
When, the diode cut-off in IGBT can be controlled, it is to avoid the damage of power device and miscellaneous equipment, system reliability and safety
Property high.
For solving above-mentioned technical problem, the invention provides a kind of DC power-supply system, including：
One end connection AC network, the other end connect the three-phase input end of the first alternating-current switch and pre-charge resistance respectively
Transformer；
Its three-phase output end connects first alternating-current switch at the midpoint of each phase bridge arm of three-phase inversion bridge circuit respectively；
Its three-phase output end is connected respectively the pre-charge resistance of the three-phase input end of the second alternating-current switch；
Second exchange for connecting corresponding with the three-phase output end of first alternating-current switch respectively of its three-phase output end
Switch；
An AC current sensor that each half bridge arm of the three-phase inversion bridge circuit includes being serially connected, one
Single-phase reactor and a power model, wherein, the AC current sensor on each in bridge arm is connected with single-phase reactor
Be connected with the second end of power model afterwards, the AC current sensor in each lower bridge arm connect with single-phase reactor after with power
The first end of module is connected；
The first end of three power models in three upper bridge arms is connected with each other rear and dc switch electrode input end
Connection；
Second end of three power models in three upper bridge arms is defeated with the dc switch negative pole after being connected with each other
Enter end connection；
Output end connects the dc switch of direct current network；
The power model includes several IGBT and electric capacity, is turned off for controlling the IGBT in control device
When, the electric current of itself input controls the diode in the IGBT to electric capacity charging and is turned off；
Three AC voltage sensors in every phase of the input side for being connected in parallel on first alternating-current switch respectively；
Three AC current sensors in every phase of the outlet side for being connected on first alternating-current switch respectively；
It is connected in parallel on the direct current voltage sensor of the dc switch output end；
It is connected on the DC current sensor of the dc switch output end；
For controlling the control device of the working condition of IGBT in each described power model；The input of the control device
End connect respectively each described AC voltage sensor, the direct current voltage sensor, each described AC current sensor with
And the DC current sensor；The output end of the control device is connected with the control end of IGBT each described respectively and flows voltage
Sensor.
Preferably, the power model includes four IGBT and electric capacity；
The emitter stage of the first IGBT be connected with the colelctor electrode of the 2nd IGBT after as the power model first end；
The emitter stage of the 3rd IGBT be connected with the colelctor electrode of the 4th IGBT after as the power model the second end；
The first end of the colelctor electrode, the colelctor electrode of the 3rd IGBT and the electric capacity of the first IGBT is connected；
Second end of the emitter stage, the emitter stage of the 3rd IGBT and the electric capacity of the 2nd IGBT is connected.
Preferably, the power model includes three IGBT, an electric capacity and a diode；
The emitter stage of the first IGBT be connected with the colelctor electrode of the 2nd IGBT after as the power model first end；
The colelctor electrode of the first IGBT is connected with the first end of the electric capacity and the negative electrode of the diode respectively；
The emitter stage connection of the emitter stage of the 2nd IGBT, the second end of the electric capacity and the 3rd IGBT；
The anode of the diode be connected with the colelctor electrode of the 3rd IGBT after as the power model the second end.
Preferably, the power model includes three IGBT, two electric capacity and a diode；
The emitter stage of the first IGBT be connected with the colelctor electrode of the 2nd IGBT after as the power model first end；
The colelctor electrode of the first IGBT is connected with the first end of the first electric capacity；
The negative electrode at second end, the first end of the second electric capacity and the diode of first electric capacity is connected；
Second end of second electric capacity connects the emitter stage of the emitter stage and the 3rd IGBT of the 2nd IGBT respectively；
The colelctor electrode of the 3rd IGBT be connected with the anode of the diode after as the power model the second end.
Preferably, the power model includes six IGBT and two electric capacity；
The emitter stage of the first IGBT be connected with the colelctor electrode of the 2nd IGBT after as the power model first end；
The colelctor electrode of the first IGBT connects the first end of the first electric capacity and the colelctor electrode of the 3rd IGBT respectively；
The emitter stage of the 2nd IGBT connects the second end of first electric capacity and the emitter stage of the 4th IGBT respectively；
The emitter stage of the 3rd IGBT connects the second end of the second electric capacity and the emitter stage of the 6th IGBT respectively；
The colelctor electrode of the 4th IGBT connects the first end of second electric capacity and the colelctor electrode of the 5th IGBT respectively；
The emitter stage of the 5th IGBT be connected with the colelctor electrode of the 6th IGBT after as the of the power model
Two ends.
Preferably, the power model includes six IGBT, four electric capacity and two diodes；
The emitter stage of the first IGBT be connected with the colelctor electrode of the 2nd IGBT after as the power model first end；
The colelctor electrode of the first IGBT connects the first end of the first electric capacity and the colelctor electrode of the 3rd IGBT respectively；
The emitter stage of the 2nd IGBT connects the second end of the second electric capacity；
The anode connection at the second end of first electric capacity, the first end of second electric capacity and the first diode；
The emitter stage of the 3rd IGBT, the negative electrode of first diode, the anode of the second diode and the 4th
The colelctor electrode connection of IGBT；
The negative electrode of second diode connects the second end of the 3rd electric capacity and the first end of the 4th electric capacity respectively；
The emitter stage of the 4th IGBT connects the second end of the 4th electric capacity and the emitter stage of the 6th IGBT respectively；
The first end of the 3rd electric capacity connects the colelctor electrode of the 5th IGBT；
The emitter stage of the 5th IGBT be connected with the colelctor electrode of the 6th IGBT after as the of the power model
Two ends.
Preferably, the single-phase reactor is specially reactor with T-shaped core or air-core reactor.
Preferably, the transformer is specially dry-type transformer.
The invention provides a kind of DC power-supply system, including transformer, the first alternating-current switch, pre-charge resistance, second
Alternating-current switch, three-phase inversion bridge circuit, dc switch, control device, AC voltage sensor, direct current voltage sensor and straight
Stream current sensor, AC current sensor that three-phase inversion bridge circuit each half bridge arm includes connecting, single-phase reactor with
And power model.When there is near-end or far end short in back end DC electrical network, control device according to direct current voltage sensor and
The DC bus-bar voltage of DC current sensor collection and DC bus current value, determine that short circuit occurs in back end DC electrical network,
And the shut-offs of the IGBT in each power model are controlled, now the electric current of each power model input can be to the electric capacity in power model
Charge, when the DC voltage at electric capacity two ends reaches predetermined voltage threshold, the diode cut-off in IGBT can be controlled, so as to block
Short-circuit current in IGBT, it is to avoid the damage of power device and miscellaneous equipment, improves system reliability and security.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in prior art and embodiment
The accompanying drawing for using is needed to be briefly described, it should be apparent that, drawings in the following description are only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can be being obtained according to these accompanying drawings
Obtain other accompanying drawings.
A kind of structural representation of DC power-supply system that Fig. 1 is provided for the present invention；
A kind of structural representation of power model that Fig. 2 is provided for the present invention；
The structural representation of another kind of power model that Fig. 3 is provided for the present invention；
The structural representation of another kind of power model that Fig. 4 is provided for the present invention；
The structural representation of another kind of power model that Fig. 5 is provided for the present invention；
The structural representation of another kind of power model that Fig. 6 is provided for the present invention；
A kind of control structure schematic diagram of control device that Fig. 7 is provided for the present invention.
Specific embodiment
The core of the present invention is to provide a kind of DC power-supply system, when near-end or far end short occurs in back end DC electrical network
When, the diode cut-off in IGBT can be controlled, it is to avoid the damage of power device and miscellaneous equipment, system reliability and safety
Property high.
Purpose, technical scheme and advantage for making the embodiment of the present invention is clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, to the embodiment of the present invention in technical scheme be clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.Embodiment in based on the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The invention provides a kind of DC power-supply system, shown in Figure 1, Fig. 1 is supplied for a kind of direct current that the present invention is provided
The structural representation of electric system；The system includes：
One end connection AC network, the other end connect the three-phase of the first alternating-current switch KM1 and pre-charge resistance R1 respectively
The transformer T of input；
Wherein, transformer T here is specially dry-type transformer.Certainly, the present invention does not limit the concrete kind of transformer T
Type.
Its three-phase output end connects the first alternating-current switch KM1 at the midpoint of each phase bridge arm of three-phase inversion bridge circuit respectively；
Its three-phase output end is connected respectively the pre-charge resistance R1 of the three-phase input end of the second alternating-current switch KM2；
Its three-phase output end the second alternating-current switch for connecting corresponding with the three-phase output end of the first alternating-current switch KM1 respectively
KM2；
An AC current sensor that each half bridge arm of three-phase inversion bridge circuit includes being serially connected (TA1～
TA6), a single-phase reactor (L1～L6) and a power model (M1～M6), wherein, alternating current on each in bridge arm
Flow sensor (TA1, TA3, TA5) connect with single-phase reactor (L1, L3, L5) after the second end with power model (M1, M3, M5)
T2 is connected, after the AC current sensor (TA2, TA4, TA6) in each lower bridge arm is connected with single-phase reactor (L2, L4, L6)
It is connected with first end T1 of power model (M2, M4, M6)；
First end T1 of three power models (M1, M3, M5) in three upper bridge arms is connected with each other rear and dc switch QS1
Electrode input end connects；
Second end T2 of three power models (M2, M4, M6) in three upper bridge arms is connected with each other rear and dc switch QS1
Negative input connects；
Output end connects the dc switch QS1 of direct current network；
Power model includes several IGBT and electric capacity, for control device MC control IGBT be turned off when, itself
The diode that the electric current of input charges to electric capacity to control in IGBT is turned off；
Three AC voltage sensors in every phase of the input side for being connected in parallel on the first alternating-current switch KM1 respectively (V1, V2,
V3)；
Three AC current sensors in every phase of the outlet side for being connected on the first alternating-current switch KM1 respectively (TA8,
TA9、TA10)；
It is connected in parallel on the direct current voltage sensor V4 of dc switch QS1 output ends；
It is connected on the DC current sensor TA7 of dc switch QS1 output ends；
For controlling the control device MC of the working condition of IGBT in each power model；The input of control device MC point
Do not connect each AC voltage sensor (V1, V2, V3), direct current voltage sensor V4, each AC current sensor (TA1～
TA6, TA8～TA10) and DC current sensor TA7；The output end of control device MC control end respectively with each IGBT
Be connected stream voltage sensor.
Wherein, control device MC connects the control end of each IGBT by optical fiber.Certainly, other connecting lines may also be employed,
The present invention is not construed as limiting to this.
It is understood that being used for per the AC current sensor (TA1～TA6) on phase bridge arm in three-phase inversion bridge circuit
Detection bridge arm current；Three AC current sensors (TA8～TA10) for being connected on the outlet side of the first alternating-current switch KM1 are used for
Detection three-phase alternating current bus current；Be connected in parallel on the input side of the first alternating-current switch KM1 three AC voltage sensors (V1, V2,
V3) it is used for detecting three-phase alternating current busbar voltage；Direct current voltage sensor V4 is used for detecting DC bus-bar voltage；DC current is sensed
Device TA7 is used for detecting DC bus current.
Here the first alternating-current switch KM1 and the second alternating-current switch KM2 is three-phase ac contactor, certainly, the present invention
To this and it is not specifically limited.
It is understood that when just beginning to turn between power model and AC network, can be to the electricity in power model
Appearance is charged, and can be produced from the upper electric current of power model to AC network during this, on this electric current can affect be
The normal work of system, therefore need setting pre-charge resistance R1 to consume electric current on this.Therefore, the work of system of the invention
The second alternating-current switch KM2 should be first closed during work, after power model completes to charge, closed the first alternating-current switch KM1, broken
The second alternating-current switch KM2 is opened, then dc switch QS1 is closed, direct current network is charged.
Wherein, the function of single-phase reactor is the specially dry type iron core in order to realize current limliting and filter the purpose of harmonic wave
Reactor or air-core reactor.Certainly, the present invention does not specifically limit the type of single-phase reactor.
The invention provides a kind of DC power-supply system, including transformer, the first alternating-current switch, pre-charge resistance, second
Alternating-current switch, three-phase inversion bridge circuit, dc switch, control device, AC voltage sensor, direct current voltage sensor and straight
Stream current sensor, AC current sensor that three-phase inversion bridge circuit each half bridge arm includes connecting, single-phase reactor with
And power model.When there is near-end or far end short in back end DC electrical network, control device according to direct current voltage sensor and
The DC bus-bar voltage of DC current sensor collection and DC bus current value, determine that short circuit occurs in back end DC electrical network,
And the shut-offs of the IGBT in each power model are controlled, now the electric current of each power model input can be to the electric capacity in power model
Charge, when the DC voltage at electric capacity two ends reaches predetermined voltage threshold, the diode cut-off in IGBT can be controlled, so as to block
Short-circuit current in IGBT, it is to avoid the damage of power device and miscellaneous equipment, improves system reliability and security.
In an advantageous embodiment, power model includes four IGBT and electric capacity C；Shown in Figure 2, Fig. 2
A kind of structural representation of the power model provided for the present invention；
The emitter stage of the first IGBT S1 be connected with the colelctor electrode of the 2nd IGBT S2 after as power model first end T1；
The emitter stage of the 3rd IGBT S3 be connected with the colelctor electrode of the 4th IGBT S4 after as power model the second end T2；
The first end of the colelctor electrode, the colelctor electrode of the 3rd IGBT S3 and electric capacity C of the first IGBT S1 is connected；
Second end of the emitter stage, the emitter stage of the 3rd IGBT S3 and electric capacity C of the 2nd IGBT S2 is connected.
In an advantageous embodiment, shown in Figure 3, the structure of another kind of power model that Fig. 3 is provided for the present invention
Schematic diagram；Power model includes three IGBT, an electric capacity C and a diode D；
The emitter stage of the first IGBT S1 be connected with the colelctor electrode of the 2nd IGBT S2 after as power model first end T1；
The colelctor electrode of the first IGBT S1 is connected with the first end of electric capacity C and the negative electrode of diode D respectively；
The emitter stage connection of the emitter stage of the 2nd IGBT S2, second end of electric capacity C and the 3rd IGBT S3；
The anode of diode D be connected with the colelctor electrode of the 3rd IGBT S3 after as power model the second end T2.
In an advantageous embodiment, power model includes three IGBT, two electric capacity and a diode D；Referring to
Shown in Fig. 4, the structural representation of another kind of power model that Fig. 4 is provided for the present invention；
The emitter stage of the first IGBT S1 be connected with the colelctor electrode of the 2nd IGBT S2 after as power model first end T1；
The colelctor electrode of the first IGBT S1 is connected with the first end of the first electric capacity C1；
The negative electrode at second end of the first electric capacity C1, the first end of the second electric capacity C2 and diode D is connected；
Second end of the second electric capacity C2 connects the emitter stage of the emitter stage and the 3rd IGBT S3 of the 2nd IGBT S2 respectively；
The colelctor electrode of the 3rd IGBT S3 be connected with the anode of diode D after as power model the second end T2.
In an advantageous embodiment, power model includes six IGBT and two electric capacity；Shown in Figure 5, Fig. 5 is this
The structural representation of another kind of power model that invention is provided；
The emitter stage of the first IGBT S1 be connected with the colelctor electrode of the 2nd IGBT S2 after as power model first end T1；
The colelctor electrode of the first IGBT S1 connects the first end of the first electric capacity C1 and the colelctor electrode of the 3rd IGBT S3 respectively；
The emitter stage of the 2nd IGBT S2 connects second end of the first electric capacity C1 and the emitter stage of the 4th IGBT S4 respectively；
The emitter stage of the 3rd IGBT S3 connects second end of the second electric capacity C2 and the emitter stage of the 6th IGBT S6 respectively；
The colelctor electrode of the 4th IGBT S4 connects the first end of the second electric capacity C2 and the colelctor electrode of the 5th IGBT S5 respectively；
The emitter stage of the 5th IGBT S5 be connected with the colelctor electrode of the 6th IGBT S6 after as power model the second end T2.
In an advantageous embodiment, power model includes six IGBT, four electric capacity and two diodes；Referring to figure
Shown in 6, the structural representation of another kind of power model that Fig. 6 is provided for the present invention；
The emitter stage of the first IGBT S1 be connected with the colelctor electrode of the 2nd IGBT S2 after as power model first end T1；
The colelctor electrode of the first IGBT S1 connects the first end of the first electric capacity C1 and the colelctor electrode of the 3rd IGBT S3 respectively；
The emitter stage of the 2nd IGBT S2 connects second end of the second electric capacity C2；
The anode connection at second end of the first electric capacity C1, the first end of the second electric capacity C2 and the first diode D1；
The emitter stage of the 3rd IGBT S3, the negative electrode of the first diode D1, the anode of the second diode D2 and the 4th IGBT
The colelctor electrode connection of S4；
The negative electrode of the second diode D2 connects second end of the 3rd electric capacity C3 and the first end of the 4th electric capacity C4 respectively；
The emitter stage of the 4th IGBT S4 connects second end of the 4th electric capacity C4 and the emitter stage of the 6th IGBT S6 respectively；
The first end of the 3rd electric capacity C3 connects the colelctor electrode of the 5th IGBT S5；
The emitter stage of the 5th IGBT S5 be connected with the colelctor electrode of the 6th IGBT S6 after as power model the second end T2.
In addition, above in each embodiment, the electric capacity in power model can be direct current thin-film capacitor, and diode can be
Fast recovery diode, certainly, the present invention does not limit the particular type of electric capacity and diode.
It is understood that above in each embodiment, the current direction in power model can achieve two-way flow, therefore
Energy can be made to flow to direct current network from AC network, in train when train starting runs using any of the above-described kind of structure
During braking, the braking energy of generation flows to AC network from direct current network, uses for other loads, and that improves energy utilizes effect
Rate.
Certainly, several preferred embodiments these are only, the concrete structure of not power limitation module of the invention, as long as can be real
During direct current net side short circuit now, diode cut-off in control IGBT, and the work(of the purpose of electric current two-way flow can be realized
Rate modular structure is within protection scope of the present invention.
In an advantageous embodiment, shown in Figure 7, a kind of control knot of control device that Fig. 7 is provided for the present invention
Structure schematic diagram.Control device includes flowing ring controller IDPIC, reactive current inner ring in outer voltage controller CDC, watt current
Controller IQPIC and SPWM modulator, the control process of control device are as follows：
Before launch train, the urban transportation acquiescence is operated in controlled rectification powering mode, traction power supply process
In, control device constantly detect the three-phase alternating current busbar voltage (UA, UB, UC) of DC power-supply system each sensor collection, three
Cross streams bus current (IA, IB, IC), DC bus-bar voltage UDC, DC bus current (IDC), 6 tunnel bridge arm currents
(IBRIDGE1～IBRIDGE6) data；
Reference value IDREF that ring controller IDPIC in watt current is obtained by DC voltage outer ring controller CDC, order
In reactive current, ring controller IQPIC reference values IQREF are 0, send pulse-width signal by SPWM modulators and control each
Power model, and then three-phase alternating current, DC bus-bar voltage and DC current is adjusted, DC voltage stability is preset in rectification
Value S_VALUE.
During train service braking, control device constantly detects DC bus-bar voltage UDC, when DC bus-bar voltage rises
To feedback preset value G_VALUE, control device is according to preset value adjustment control model to inversion feedback pattern, DC voltage outer shroud
Controller CDC sends inversion feedback current command value IDREF to ring controller IDPIC in watt current, by SPWM modulators
The DC energy that regenerative braking is produced is fed back to AC network by driving power module, until DC bus-bar voltage UDC drops to
Rectification preset value S_VALUE.
Certainly, these are only that preferred embodiment, the present invention do not limit the concrete control program content included in control device.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, as which corresponds to the method disclosed in Example, so description is fairly simple, related part is said referring to method part
Bright.
Also, it should be noted in this manual, such as first and second or the like relational terms be used merely to by
One entity or operation are made a distinction with another entity or operation, and are not necessarily required or implied these entities or operation
Between exist any this actual relation or order.And, term " including ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that a series of process, method, article or equipment including key elements not only includes that
A little key elements, but also other key elements including being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element for being limited by sentence "including a ...", does not arrange
Remove and also there is other identical element in process, method, article or the equipment for including the key element.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Multiple modifications of these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (8)
1. a kind of DC power-supply system, it is characterised in that include：
One end connection AC network, the other end connect the change of the three-phase input end of the first alternating-current switch and pre-charge resistance respectively
Depressor；
Its three-phase output end connects first alternating-current switch at the midpoint of each phase bridge arm of three-phase inversion bridge circuit respectively；
Its three-phase output end is connected respectively the pre-charge resistance of the three-phase input end of the second alternating-current switch；
Its three-phase output end second alternating-current switch for connecting corresponding with the three-phase output end of first alternating-current switch respectively；
An AC current sensor that each half bridge arm of the three-phase inversion bridge circuit includes being serially connected, one single-phase
Reactor and a power model, wherein, the AC current sensor on each in bridge arm connect with single-phase reactor after with
Second end of power model is connected, the AC current sensor in each lower bridge arm connect with single-phase reactor after with power model
First end be connected；
The first end of three power models in three upper bridge arms is connected with dc switch electrode input end after being connected with each other；
Second end of three power models in three upper bridge arms be connected with each other after with the dc switch negative input
Connection；
Output end connects the dc switch of direct current network；
The power model includes several IGBT and electric capacity, for when control device controls the IGBT and is turned off, from
The electric current of body input controls the diode in the IGBT to electric capacity charging and is turned off；
Three AC voltage sensors in every phase of the input side for being connected in parallel on first alternating-current switch respectively；
Three AC current sensors in every phase of the outlet side for being connected on first alternating-current switch respectively；
It is connected in parallel on the direct current voltage sensor of the dc switch output end；
It is connected on the DC current sensor of the dc switch output end；
For controlling the control device of the working condition of IGBT in each described power model；The input of the control device point
Do not connect each described AC voltage sensor, the direct current voltage sensor, each described AC current sensor and institute
State DC current sensor；The output end of the control device is connected with the control end of IGBT each described respectively and flows voltage sensor
Device.
2. system according to claim 1, it is characterised in that the power model includes four IGBT and electricity
Hold；
The emitter stage of the first IGBT be connected with the colelctor electrode of the 2nd IGBT after as the power model first end；
The emitter stage of the 3rd IGBT be connected with the colelctor electrode of the 4th IGBT after as the power model the second end；
The first end of the colelctor electrode, the colelctor electrode of the 3rd IGBT and the electric capacity of the first IGBT is connected；
Second end of the emitter stage, the emitter stage of the 3rd IGBT and the electric capacity of the 2nd IGBT is connected.
3. system according to claim 1, it is characterised in that the power model include three IGBT, an electric capacity with
And a diode；
The emitter stage of the first IGBT be connected with the colelctor electrode of the 2nd IGBT after as the power model first end；
The colelctor electrode of the first IGBT is connected with the first end of the electric capacity and the negative electrode of the diode respectively；
The emitter stage connection of the emitter stage of the 2nd IGBT, the second end of the electric capacity and the 3rd IGBT；
The anode of the diode be connected with the colelctor electrode of the 3rd IGBT after as the power model the second end.
4. system according to claim 1, it is characterised in that the power model include three IGBT, two electric capacity with
And a diode；
The emitter stage of the first IGBT be connected with the colelctor electrode of the 2nd IGBT after as the power model first end；
The colelctor electrode of the first IGBT is connected with the first end of the first electric capacity；
The negative electrode at second end, the first end of the second electric capacity and the diode of first electric capacity is connected；
Second end of second electric capacity connects the emitter stage of the emitter stage and the 3rd IGBT of the 2nd IGBT respectively；
The colelctor electrode of the 3rd IGBT be connected with the anode of the diode after as the power model the second end.
5. system according to claim 1, it is characterised in that the power model includes six IGBT and two electric capacity；
The emitter stage of the first IGBT be connected with the colelctor electrode of the 2nd IGBT after as the power model first end；
The colelctor electrode of the first IGBT connects the first end of the first electric capacity and the colelctor electrode of the 3rd IGBT respectively；
The emitter stage of the 2nd IGBT connects the second end of first electric capacity and the emitter stage of the 4th IGBT respectively；
The emitter stage of the 3rd IGBT connects the second end of the second electric capacity and the emitter stage of the 6th IGBT respectively；
The colelctor electrode of the 4th IGBT connects the first end of second electric capacity and the colelctor electrode of the 5th IGBT respectively；
The emitter stage of the 5th IGBT be connected with the colelctor electrode of the 6th IGBT after as the power model the second end.
6. system according to claim 1, it is characterised in that the power model include six IGBT, four electric capacity with
And two diodes；
The emitter stage of the first IGBT be connected with the colelctor electrode of the 2nd IGBT after as the power model first end；
The colelctor electrode of the first IGBT connects the first end of the first electric capacity and the colelctor electrode of the 3rd IGBT respectively；
The emitter stage of the 2nd IGBT connects the second end of the second electric capacity；
The anode connection at the second end of first electric capacity, the first end of second electric capacity and the first diode；
The emitter stage of the 3rd IGBT, the negative electrode of first diode, the anode of the second diode and the 4th IGBT's
Colelctor electrode connects；
The negative electrode of second diode connects the second end of the 3rd electric capacity and the first end of the 4th electric capacity respectively；
The emitter stage of the 4th IGBT connects the second end of the 4th electric capacity and the emitter stage of the 6th IGBT respectively；
The first end of the 3rd electric capacity connects the colelctor electrode of the 5th IGBT；
The emitter stage of the 5th IGBT be connected with the colelctor electrode of the 6th IGBT after as the power model the second end.
7. system according to claim 1, it is characterised in that the single-phase reactor be specially reactor with T-shaped core or
Air-core reactor.
8. system according to claim 1, it is characterised in that the transformer is specially dry-type transformer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109713708A (en) * | 2017-10-25 | 2019-05-03 | 株洲中车时代电气股份有限公司 | A kind of subway energy feedback system and the method and device applied to subway energy feedback system |
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