CN207518282U - A kind of battery energy storage system of double tube positive exciting multiport separate current control - Google Patents
A kind of battery energy storage system of double tube positive exciting multiport separate current control Download PDFInfo
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- CN207518282U CN207518282U CN201721413676.9U CN201721413676U CN207518282U CN 207518282 U CN207518282 U CN 207518282U CN 201721413676 U CN201721413676 U CN 201721413676U CN 207518282 U CN207518282 U CN 207518282U
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Abstract
The utility model discloses a kind of battery energy storage system of double tube positive exciting multiport separate current control, including battery unit, main power inverter, double tube positive exciting integrated converter；Main power inverter is used to control the principal current of battery unit, main power inverter and battery units in parallel, and accesses three-phase AC grid；Double tube positive exciting integrated converter connect with multigroup battery module and carries out closed loop independent control to each component part of battery unit respectively.The utility model is independently controlled the difference currents part of battery module by main power inverter and the realization of double tube positive exciting integrated converter, without being independently controlled to all batteries electric current, and double tube positive exciting integrated converter primary side is using integrated simplex winding structure, there is Releasing loop using itself transformer energy storage, it does not need to separately set reset circuit, reduce cost and the loss of current transformer, the voltage stress that no switching tube leads directly to danger and born is small, can improve the capacity usage ratio of battery module.
Description
Technical field
The utility model is related to energy-storage system field and converters fields, and in particular, to a kind of two-tube
The battery energy storage system of normal shock multiport separate current control.
Background technology
As global energy supplies the aggravation of growing tension and environmental pollution, new energy power generation technology emerges rapidly, and one
The regenerative resources such as aspect solar power generation and wind-power electricity generation, which have, pollutes small, inexhaustible advantage, receives great pass
Note, the output of another aspect renewable energy power generation have very big fluctuation and randomness, influence grid-connected stability, reliable
Property and safety, and energy storage is to cope with one of best-of-breed technology of this challenge.Wherein, battery energy storage is easy for installation fast with its
The prompt, advantages such as construction period is short, extending capacity reformation (modularization) facilitates, have been obtained for extensive use.
Existing modular battery energy-storage system generally use total power independent control type flexibility energy-storage system in groups, battery
Whole charging and discharging currents of module will flow through respective converter switches device, cause device current stress big, conduction loss
Big constant power loss, particularly when power system capacity increases to larger base, problem is more prominent.In view of each battery at this stage
Module capacity fluctuates in a certain range substantially, even echelon utilizes battery, capacity volume variance will not be too big, it is not necessary that right
The electric current of all batteries is independently controlled.
Therefore, it is proposed to a kind of battery energy storage system of separate current control simple in structure, efficient, safe, reduces and becomes
Loss and the cost of device are flowed, realizes that maximum functional duty ratio is more than 0.5, avoids device for power switching shoot through and voltage liter
The advantages of range is wide is dropped, improves the capacity usage ratio of battery module.
Utility model content
In view of problem above, the purpose of this utility model is to provide a kind of electricity of double tube positive exciting multiport separate current control
Pond energy-storage system, to solve in existing total power Modular Flexible group system, the whole that switching device flows through battery module is filled
Discharge current and cause device current stress big, of high cost, while avoid the danger of device for power switching shoot through, realize most
Big operative duty cycles are more than 0.5 and voltage up-down range is wide.
To achieve these goals, the utility model is achieved through the following technical solutions：
A kind of battery energy storage system of double tube positive exciting multiport separate current control, including：
Battery unit, the battery unit include multigroup battery module of series connection or the battery cell of series connection；
Main power inverter, the main power inverter and the battery units in parallel, for controlling the battery unit
Principal current, the main power inverter access three-phase AC grid；And
Double tube positive exciting integrated converter connect with multigroup battery module and carries out closed loop independence to every group of battery module respectively
Control, for controlling the difference of the charging and discharging currents of every group of battery module and the principal current.
The battery energy storage system of the double tube positive exciting multiport separate current control, further includes control circuit, control circuit
It is connect respectively with main power inverter, double tube positive exciting integrated converter.
Preferably, the main power inverter includes：
First capacitor, with the battery units in parallel；And
Six switching tubes of first switch Guan Zhi, each switching tube difference of six switching tubes of first switch Guan Zhi are anti-simultaneously
Join a diode, first switch pipe is connected between the first end of the first inductor and the anode of battery unit, second switch
Pipe is connected between the first end of the first inductor and the cathode of battery unit, and third switching tube is connected to the of the second inductor
Between one end and the anode of battery unit, the 4th switching tube be connected to the second inductor first end and battery unit cathode it
Between, the 5th switching tube is connected between the first end of third inductor and the anode of battery unit, and the 6th switching tube is connected to
Between the first end of three inductors and the cathode of battery unit, the first inductor, the second inductor and third inductor second
End is respectively connected to a phase of three-phase AC grid.
The first switch pipe, second switch pipe, third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube
Grid be connected with control circuit, make first switch pipe, second switch pipe, third switching tube, the 4th switching tube, the 5th switch
The conducting of pipe, the 6th switching tube is controlled with turning off by control circuit.
Preferably, the double tube positive exciting integrated converter includes：
Primary side integrated form high-frequency isolation transformer, the primary side integrated form high-frequency isolation transformer include an integrated primary side
Winding and multiple vice-side windings：
Primary side converter is connect with the integrated primary side winding；And
Multiple secondary converters, each vice-side winding are correspondingly connected with by each secondary converter and every group of battery module.
Further, it is preferable to, the primary side converter includes：
Second capacitor, with the battery units in parallel；
7th switching tube and the 8th switching tube, each switching tube difference inverse parallel of the 8th switching tube of the 7th switching tube
One diode, the 7th switching tube be connected to the first terminal of the integrated primary side winding and the battery unit anode it
Between；8th switching tube is connected between the Second terminal of the integrated primary side winding and the cathode of the battery unit；With
And
First clamp diode and the second clamp diode, first clamp diode are connected to the battery unit
The Second terminal of anode and the integrated primary side winding, second clamp diode be connected to the cathode of the battery unit with
The first terminal of the integrated primary side winding.
7th switching tube, the 8th switching tube grid be connected with control circuit, make the 7th switching tube, the 8th switch
The conducting of pipe is controlled with turning off by control circuit.
Preferably, the secondary converter includes n separate unit, wherein vice-side winding W1First separate single at place
Member includes
Third capacitor, it is in parallel with the battery module；
4th inductor, the 4th inductor are connected to the first terminal of the vice-side winding and the battery module
Between anode；And
Each switching tube difference of 9th switching tube and the tenth switching tube, the 9th switching tube and the tenth switching tube is anti-simultaneously
Join a diode, the 9th switching tube be connected to the Second terminal of the vice-side winding and the battery module cathode it
Between, the tenth switching tube is connected between one end of the 4th inductor and the cathode of the battery module；
Remaining vice-side winding W2、...、WnThe rest may be inferred for the structure of second to n-th separate unit at place.
9th switching tube, the tenth switching tube grid be connected with control circuit, make the 9th switching tube, the tenth switch
The conducting of pipe is controlled with turning off by control circuit.
Preferably, the main power inverter controls the principal current by vector controlled, and the vector controlled is included just
One kind in string pulsewidth modulation (SPWM) and space vector pulse width modulation (SVPWM).
Preferably, the double tube positive exciting integrated converter controls the difference current by PWM control strategies, institute
It is the duty ratio by setting power switch pipe to state PWM control strategies, and the conducting and shutdown for controlling switching tube carry out control circuit
The size of output voltage or electric current.
Preferably, the primary side converter is connect or the primary side converter and external dc electricity with the battery unit
Source is directly connected to.
Compared with prior art, the utility model has the following advantages that and advantageous effect：
1st, in the utility model, main power inverter undertakes most power, controls the principal current of battery unit, improves
Overall efficiency；This circuit is only independently controlled the 5%-20% in battery total current, to adapt to inconsistency, improves battery
Capacity usage ratio, and double tube positive exciting integrated converter uses the topological structure that integrates of primary side, reduces the control of battery energy storage system
Loss, cost, volume and the weight of power processed are meeting in the case that a primary side corresponds to multiple secondary, when needing to increase
During battery module, each battery module is only used in secondary and adds a secondary converter, and primary side remains unchanged, and will not be right
Primary circuit impacts.
2nd, the utility model uses two-transistor forward converter, what power switch pipe did not had the danger of shoot through and bore
Voltage stress is small, itself has energy Releasing loop, does not need to separately set the structural complexity of reset circuit increase converter, realizes
The advantages of two-way flexible control, maximum functional duty ratio is more than 0.5 and wide voltage up-down range.
3rd, the utility model realizes the difference to battery module by main power inverter and double tube positive exciting integrated converter
Current segment is independently controlled, and without being independently controlled to all batteries electric current, and double tube positive exciting integrated converter is former
There is Releasing loop on side using itself transformer energy storage, does not need to separately set reset circuit, reduced unsteady flow using integrated simplex winding structure
The cost of device and loss, the voltage stress that no switching tube leads directly to danger and born is small, can improve the energy profit of battery module
With rate.
4th, the utility model can be adapted for high pressure, in high-power grade, the energy-storage system more demanding to utilization rate should
Use occasion.
Description of the drawings
Fig. 1 is a kind of structure of the battery energy storage system of double tube positive exciting multiport separate current control described in the utility model
Schematic diagram.
Fig. 2 is a kind of circuit of the battery energy storage system of double tube positive exciting multiport separate current control described in the utility model
Figure.
Fig. 3 is the working waveform figure of double tube positive exciting integrated converter forward direction work described in the utility model.
Fig. 4 is the working waveform figure of double tube positive exciting integrated converter reverse operation described in the utility model.
Specific embodiment
It elaborates below in conjunction with the accompanying drawings with example to specific embodiment of the present utility model.
Fig. 1 is the construction scheme figure of battery energy storage system described in the utility model, as shown in Figure 1, described in the utility model
The construction scheme figure of battery energy storage system includes：Double tube positive exciting integrated converter, battery unit, main power inverter and three-phase
Alternating current carries out Partial Power independent electrical flow control by main power inverter and double tube positive exciting integrated converter to battery module
System.
Fig. 2 gives the main circuit diagram of battery energy storage system preferred embodiment described in the utility model, as shown in Fig. 2, this
Battery energy storage system described in utility model includes：
Battery unit 100, the battery unit include multigroup battery module 110 of series connection or the battery of series connection
Monomer；
Main power inverter 200, in parallel with the battery unit 100, main power inverter 200 is used to control the battery
The principal current of unit 100, and main power inverter 200 accesses three-phase AC grid, wherein, principal current refers to all battery modules
The same section of electric current；And
Double tube positive exciting integrated converter 300 is connect with multigroup battery module 110, for filling to each group battery module 110
The difference of discharge current and principal current carries out closed loop control, wherein, based on the difference of charging and discharging currents and principal current is preferred
The 5%-20% of electric current to adapt to existing difference between different battery modules, makes each battery module that can be operated in most preferably
State；There was only switching device of the fraction electric current by the power inverter corresponding to each battery module in battery module, reduce
Device current stress and conduction loss reduce cost, realize the capacity usage ratio for improving battery module.
Principal current and difference currents are controlled respectively by main power inverter 200 and double tube positive exciting integrated converter 300,
So as to fulfill the independent control to 110 charging and discharging currents of battery module.
Wherein, battery module 110 can be the lithium ionic cell module of new production, lead-acid battery module, ultracapacitor
Fortune battery is moved back in module or Ni-MH battery module etc. or other systems, to realize that the echelon for moving back fortune battery utilizes, is filled
The utility value of remaining power module is waved in distribution, is conducive to environmental protection and resource-effective, and battery module 110 is preferably low pressure
Battery module, another preferably battery cell.
As described in Figure 2, main power inverter 200 is preferably gird-connected inverter structure, including：
First capacitor 210, it is in parallel with the battery unit 100；And
First switch pipe Q1To the 6th switching tube Q6, the first switch pipe Q1To the 6th switching tube Q6Each switching tube
One diode 220 of inverse parallel respectively, first switch pipe Q1First end be connected to the first end of the first inductor 230, and
One switching tube Q1Second end be connected to the anode of battery unit 100；Second switch pipe Q2Second end be connected to the first inductor
230 first end, and second switch pipe Q2First end be connected to the cathode of battery unit 100；Third switching tube Q3First end
It is connected to the first end of the second inductor 240, and third switching tube Q3Second end be connected to the anode of battery unit 100；The
Four switching tube Q4Second end be connected to the first end of the second inductor 240, and the 4th switching tube Q4Second end be connected to battery
The cathode of unit 100；5th switching tube Q5First end be connected to the first end of third inductor 250, and the 5th switching tube Q5's
Second end is connected to the anode of battery unit 100；6th switching tube Q6Second end be connected to the first of third inductor 250
End, and the 6th switching tube Q6First end be connected to the cathode of battery unit 100, the first inductor 230, the second inductor 240
A phase U of three-phase AC grid is respectively connected to the second end of third inductor 250a、Ub、Uc。
Preferably, first switch pipe Q1To the 6th switching tube Q6Can be igbt (IGBT, Insulated
Gate Bipolar Transistor) can also be Metal-Oxide Semiconductor field-effect transistor (MOSFET, Metal-
Oxide-Semiconductor Field Effect Transistor), different voltages grade that can be according to application scenario and institute
The switching frequency needed selects suitable switching tube.At this point, it is preferred that IGBT, first switch pipe Q1To the 6th switching tube Q6First end
It is the transmitting collection terminal of IGBT, first switch pipe Q1To the 6th switching tube Q6Second end be IGBT collector terminal.
Main power inverter 200 controls principal current by vector controlled control, and the vector controlled includes sine
One kind in pulsewidth modulation (SPWM) and space vector pulse width modulation (SVPWM).
Preferably, the double tube positive exciting integrated converter 300 of the utility model is integrated using the primary side of a primary side winding 311
Formula high frequency transformer 310 corresponds to multiple vice-side windings 312, and cost, loss, volume and weight is made accordingly to reduce.Double tube positive exciting
Integrated converter 300 controls the difference current by introducing PWM control strategies, and the PWM control strategies are to pass through
The duty ratio of power switch pipe is set, control the conducting of switching tube and shutdown come control circuit output voltage or electric current it is big
It is small.
As shown in Fig. 2, double tube positive exciting integrated converter 300 includes：
Primary side integrated form high-frequency isolation transformer 310, the primary side integrated form high-frequency isolation transformer 310 include a collection
Into primary side winding 311 and multiple vice-side windings 312：
Primary side converter 320 is connect with the integrated primary side winding 311；And
Multiple secondary converters 330, each vice-side winding 312 pass through each secondary converter 330 and every group of battery module
110 are correspondingly connected with, and realize the closed loop control to the difference of the charging and discharging currents and principal current of each group battery module 110.
On the basis of the principal current of battery unit 100, the difference between 110 charging and discharging currents of each group battery module and principal current
Different electric current have just have it is negative, so 300 preferably bidirectional isolation DC-DC converter of double tube positive exciting integrated converter.
As shown in Figure 1, two-way isolation DC-DC converter is two-way isolation two-transistor forward converter structure, itself is with storage
Energy Releasing loop, does not need to separately set reset circuit or reset winding, the primary side converter 320 includes：
Second capacitor 321, it is in parallel with the battery unit 100；
7th switching tube Q7With the 8th switching tube Q8, the 7th switching tube Q78th switching tube Q8Each switching tube point
Other one diode of inverse parallel, the 7th switching tube Q7First end be connected to the anode of the battery unit 100, the 7th switching tube
Q7Second end be connected to the integrated primary side winding WpFirst terminal；The 8th switching tube Q8First terminal be connected to
The integrated primary side winding WpSecond terminal, the 8th switching tube Q8Second terminal be connected to the battery unit 100
Between cathode, the 7th switching tube Q7With the 8th switching tube Q8Danger without shoot through ensures the safety of switching tube work；And
The anode of first clamp diode VD1 and the second clamp diode VD2, the first clamp diode VD1 connect
In the integrated primary side winding WpSecond terminal, the cathode of the first clamp diode VD1 is connected to the battery unit
100 anode, the anode of the second clamp diode VD2 are connected to the cathode of the battery unit, second clamper two
The cathode of pole pipe VD2 is connected to the integrated primary side winding WpFirst terminal.
Preferably, the 7th switching tube Q7With the 8th switching tube Q8Can be igbt (IGBT, Insulated
Gate Bipolar Transistor) can also be Metal-Oxide Semiconductor field-effect transistor (MOSFET, Metal-
Oxide-Semiconductor Field Effect Transistor), different voltages grade that can be according to application scenario and institute
The switching frequency needed selects suitable switching tube.It is preferred that MOSFET, the 7th switching tube Q7With the 8th switching tube Q8First end be
The source terminal of MOSFET, the 7th switching tube Q7With the 8th switching tube Q8Second end be MOSFET drain terminal.
As shown in Figure 1, the secondary converter topology structure all same of each battery module of correspondence, first secondary
For converter connection method, remaining connection method is constant, and the secondary converter 330 includes：
Third capacitor 331, it is in parallel with the battery module 110；
4th inductor 332, one end of the 4th inductor 332 are connected to the vice-side winding W1First terminal,
The other end of 4th inductor 332 is connected to the anode of the battery module 110；And
9th switching tube Q9With the tenth switching tube Q10, the 9th switching tube Q9With the tenth switching tube Q19Each switching tube
One diode of inverse parallel respectively, the 9th switching tube Q9First end be connected to the vice-side winding W1Second terminal, institute
State the 9th switching tube Q9Second end be connected to the cathode of the battery module 110, the tenth switching tube Q10First end connects
In one end of the 4th inductor 332, the tenth switching tube Q10Second end is connected to the cathode of the battery module 110.
Preferably, the 9th switching tube Q9With the tenth switching tube Q10Can be igbt (IGBT,
Insulated Gate Bipolar Transistor) can also be Metal-Oxide Semiconductor field-effect transistor
(MOSFET, Metal-Oxide-Semiconductor Field Effect Transistor), can be according to application scenario not
Suitable switching tube is selected with voltage class and required switching frequency.It is preferred that MOSFET, the 9th switching tube Q9With the tenth switch
Pipe Q10First end be MOSFET source terminal, the 9th switching tube Q9With the tenth switching tube Q10Second end be MOSFET leakage
Extreme son.
Preferably, the DC side of primary side converter 320 can directly be connected on electricity inside foregoing battery energy storage system
The both ends of pool unit 100 can also access the both ends of other external dc power supplies.
Below by taking two-transistor forward converter operation principle as an example, the utility model institute is described in detail with reference to Fig. 2, Fig. 3 and Fig. 4
State the course of work of battery energy storage system.
As described in Figure 2, main power inverter is opened by the coordinate transform of grid-connected three-phase voltage by SVPWM controls first
Close pipe Q1To the 6th switching tube Q6Duty ratio, obtain the principal current I for meeting grid-connected requirement under required DC voltage levelm1。
When battery module is under charged state, as shown in figure 3, the double tube positive exciting integrated converter course of work is as follows, t0
Moment, the 7th switching tube Q7To the 9th switching tube Q9Conducting, the tenth switching tube Q10Shutdown, the first clamp diode VD1 and second
Clamp diode VD2 bears backward voltage cut-off, and energy is transmitted from primary side winding to vice-side winding, gives inductance Ls1And battery module
Charging；t1Moment, the 7th switching tube Q7To the tenth switching tube Q10It is turned off, primary side winding leakage inductance Lm, the 7th switching tube knot electricity
Appearance, the junction capacity of the 8th switching tube and the second capacitor 321 generate resonance, and anti-paralleled diode 333 is connected at this time；t2When
It carves, the tenth switch tube zero voltage turn-on, the 7th switching tube Q7To the 9th switching tube Q9It still turns off, primary side converter resonance terminates, secondary
Side transformer starts to generate resonance；t3At the moment, secondary voltage is reversed, the 9th switching tube Q9Both end voltage rises；t4Moment, first
Clamp diode VD1 and the second clamp diode VD2 conductings, the 7th switching tube Q7To the 8th switching tube Q8It is clamped to input voltage,
Reduce the voltage stress of switching tube, the second capacitors of VD1-VD2- 321 form magnetic reset circuit at this time；t5Moment, the tenth switch
Pipe Q10Shutdown, diode 334 are connected, until next new period.
It is zero by the sum of the Flux consumption of inductive drop in one cycle, i.e., the positive lower input and output voltage relationship of work is such as
Under：
Wherein, V1For primary side converter input voltage, V2Secondary converter output voltage, DfFor positive operating switch device
Duty ratio, N is the no-load voltage ratio of primary side winding and vice-side winding.
When battery module is under discharge condition, as shown in figure 4, the double tube positive exciting integrated converter course of work is as follows, t0
Moment, the tenth switching tube Q10Conducting, the 9th switching tube Q9Shutdown, battery module is to inductance Ls1Charging；t1Moment, former and deputy side around
The voltage at group both ends starts reversely；t2Moment, the first clamp diode VD1 and the second clamp diode VD2 conductings, will reset energy
Amount is transferred to power grid；t3Moment, the tenth switching tube Q10Shutdown, the 9th switching tube Q9Conducting generates resonance；t4Moment, inverse parallel two
Pole pipe 322 and anti-paralleled diode 323 are connected, until t5Moment circuit enters next new period.
It is zero by the sum of the Flux consumption of inductive drop in one cycle, i.e., input and output voltage relationship is such as under reverse operation
Under：
Wherein, DrDuty ratio for reverse operation switching device.
According to the duty ratio of different battery module working conditions, double tube positive exciting can be controlled to convert by PWM control strategies
The on off state of device.
As shown in Fig. 2, the voltage differences of battery modules or battery cell of the specification selected by us are little, you can assuming that vd1=
vd2=...=vdn, consider that ideally loss of the double tube positive exciting integrated converter in energy transport can be ignored not
Meter.According to power conservation it is found that the power P of primary side converterpEqual to the sum of secondary converter differing power, then have：
Pp=P∑s=Pd1+Pd2+…+Pdn
=vd1Id1+vd2Id2+…+vdnIdn
=vd1(Id1+Id2+…+Idn)
vdpFor primary side DC voltage, equal to all battery cell voltages, then primary side converter DC side electric current IdpFor：
Make the principal current I of battery unit by reasonably optimizing controlMFor the average current of all battery currents, then Id1、
Id2、…、IdnEtc. difference currents have just and have negative, difference currents are made after positive and negative counteracting and for 0, can obtained
Due to IdpIt is 0, then it is almost 0 to integrate primary side power, and the loss of primary side converter, cost also decrease.
It, can be in conclusion the battery energy storage system of the Partial Power independent control is by given rational control electric current
Realize that the control power of battery energy storage system double tube positive exciting integrated converter substantially reduces, the current stress that switching tube is born subtracts
Small, absolutely loss reduces, and improves the capacity usage ratio of battery.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiment of the utility model is not by above-mentioned
The limitation of embodiment, the change made under other any Spirit Essences and principle without departing from the utility model are modified, are replaced
In generation, simplifies combination, should be equivalent substitute mode, is included within the scope of protection of the utility model.
Claims (8)
1. a kind of battery energy storage system of double tube positive exciting multiport separate current control, which is characterized in that including：
Battery unit, the battery unit include multigroup battery module of series connection, the battery cell connected；
Main power inverter, the main power inverter and the battery units in parallel, for controlling the master of the battery unit
Electric current, the main power inverter access three-phase AC grid；
And double tube positive exciting integrated converter, it is connect with multigroup battery module or battery cell and respectively to every group of battery module
Either battery cell carries out closed loop independent control for controlling the charging and discharging currents of every group of battery module or battery cell and institute
State the difference of principal current.
2. the battery energy storage system of double tube positive exciting multiport separate current control according to claim 1, which is characterized in that
The main power inverter includes：
First capacitor, with the battery units in parallel；
And six switching tubes of first switch Guan Zhi, each switching tube difference of six switching tubes of first switch Guan Zhi are anti-simultaneously
Join a diode, first switch pipe is connected between the first end of the first inductor and the anode of battery unit, second switch
Pipe is connected between the first end of the first inductor and the cathode of battery unit, and third switching tube is connected to the of the second inductor
Between one end and the anode of battery unit, the 4th switching tube be connected to the second inductor first end and battery unit cathode it
Between, the 5th switching tube is connected between the first end of third inductor and the anode of battery unit, and the 6th switching tube is connected to
Between the first end of three inductors and the cathode of battery unit, the first inductor, the second inductor and third inductor second
End is respectively connected to a phase of three-phase AC grid.
3. the battery energy storage system of double tube positive exciting multiport separate current control according to claim 1, which is characterized in that institute
Double tube positive exciting integrated converter is stated to include：
Primary side integrated form high-frequency isolation transformer, the primary side integrated form high-frequency isolation transformer include an integrated primary side winding
WpWith n vice-side winding, vice-side winding is followed successively by W1、W2、...、Wn；
Primary side converter is connect with the integrated primary side winding；
And multiple secondary converters, each vice-side winding are correspondingly connected with by each secondary converter and every group of battery module.
4. the battery energy storage system of double tube positive exciting multiport separate current control according to claim 3, which is characterized in that institute
Primary side converter is stated to include：
Second capacitor, with the battery units in parallel；
7th switching tube and the 8th switching tube, each switching tube difference inverse parallel one of the 8th switching tube of the 7th switching tube
Diode, the 7th switching tube are connected between the first terminal of the integrated primary side winding and the anode of the battery unit；Institute
The 8th switching tube is stated to be connected between the Second terminal of the integrated primary side winding and the cathode of the battery unit；And
First clamp diode and the second clamp diode, first clamp diode are connected to the anode of the battery unit
With the Second terminal of the integrated primary side winding, second clamp diode be connected to the cathode of the battery unit with it is described
The first terminal of integrated primary side winding.
5. the battery energy storage system of double tube positive exciting multiport separate current control according to claim 3, which is characterized in that
The secondary converter includes n separate unit, wherein vice-side winding W1First separate unit at place includes
Third capacitor, it is in parallel with the battery module；
4th inductor, the 4th inductor are connected to the first terminal of the vice-side winding and the anode of the battery module
Between；And
Each switching tube difference inverse parallel one of 9th switching tube and the tenth switching tube, the 9th switching tube and the tenth switching tube
A diode, the 9th switching tube are connected between the Second terminal of the vice-side winding and the cathode of the battery module,
Tenth switching tube is connected between one end of the 4th inductor and the cathode of the battery module；
Remaining vice-side winding W2、...、WnThe rest may be inferred for the structure of second to n-th separate unit at place.
6. the battery energy storage system of double tube positive exciting multiport separate current control according to claim 3, which is characterized in that institute
State that primary side converter is connect with the battery unit or the primary side converter is directly connected to external dc power.
7. the battery energy storage system of double tube positive exciting multiport separate current control according to claim 1, which is characterized in that institute
It states main power inverter and principal current is controlled by vector controlled, the vector controlled includes sinusoidal pulse width modulation and space vector arteries and veins
Width modulation.
8. the battery energy storage system of double tube positive exciting multiport separate current control according to claim 1, which is characterized in that institute
It states double tube positive exciting integrated converter to control difference current by PWM control strategies, the PWM control strategies are by setting
Put the duty ratio of power switch pipe, control the conducting of switching tube and shutdown come control circuit output voltage or electric current it is big
It is small.
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| CN107834582A (en) * | 2017-10-30 | 2018-03-23 | 华南理工大学 | A kind of battery energy storage system of double tube positive exciting multiport separate current control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834582A (en) * | 2017-10-30 | 2018-03-23 | 华南理工大学 | A kind of battery energy storage system of double tube positive exciting multiport separate current control |
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