CN107332265A - Two way convertor efficiency optimization control method in micro-grid energy storage system - Google Patents
Two way convertor efficiency optimization control method in micro-grid energy storage system Download PDFInfo
- Publication number
- CN107332265A CN107332265A CN201710377823.XA CN201710377823A CN107332265A CN 107332265 A CN107332265 A CN 107332265A CN 201710377823 A CN201710377823 A CN 201710377823A CN 107332265 A CN107332265 A CN 107332265A
- Authority
- CN
- China
- Prior art keywords
- loss
- control method
- way convertor
- control
- micro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses two way convertor efficiency optimization control method in a kind of micro-grid energy storage system, traditional underloading phase cut control, multiple degrees of freedom frequency modulation control and phase shift magnetic technology are combined, the energy-storage system uses 6 staggered two way convertor main circuits in parallel, a load current loss model is initially set up, the corresponding load current of optimal cut point is derived；Secondly the optimization work frequency sought using multiple degrees of freedom FREQUENCY CONTROL under phase cut control；The ripple finally suppressed using phase shift technology and magnetic Integrated design under underloading, cut and low frequency is deteriorated, and reaches the control targe of higher efficiency operation in the case of underloading；Compared with micro-grid energy storage system two way convertor of the prior art, it is relatively low that the present invention can effectively improve two way convertor light-load efficiency in micro-grid energy storage system, and traditional phase cut control easily causes the problem that ripple deteriorates, greatly expand two way convertor high-efficiency operation interval, improve the stability and reliability of system.
Description
Technical field
The present invention relates to micro-capacitance sensor technical field, two way convertor is imitated in more particularly to a kind of micro-grid energy storage system
Rate optimal control method.
Background technology
Two way convertor, as connection micro-capacitance sensor bus and the key of each distributed energy module, is the core of energy-storage system
Center device.As scale energy-storage system is to high efficiency, the demand of Large Copacity two way convertor, and high voltage electric storage pool technology
Maturation, in recent years, the two-way topology of crisscross parallel non-isolation type is applied to grid-connected power generation system by many scholars, and is obtained
Good effect.But because the micro-grid system energy inputs variation, load under its islet operation pattern it is complicated and changeable, if
Current transformer Multiphase Parallel is worked in the case of underloading, larger switching loss and the loss of magnetic part, can reduce converter conversion effect
Rate, the target of serious restriction micro-grid system high-efficiency operation.
For problem above, micro-grid energy storage system reversible transducer is currently mainly realized using following several method
The target of high-efficiency operation：
1st, the staggered current transformer real work number of phases is reduced during underloading to widen current transformer high-efficiency operation scope；2nd, carry
The work number of phases control strategy based on loss model is gone out；3rd, frequency modulation plus the control strategy of cut under underloading are proposed.But this
There is problem in a little methods, such as first method lacks the general policies of crisscross parallel current transformer cut, and control method mistake
In complexity, it is unfavorable for all-digitized demodulator realization；Second method carries out the further research after cut because failing, such as with work
Make number of phases reduction, the problem of underloading ripple deteriorates is presented in converter, not only make it that the multiple technology advantage of crisscross parallel is not multiple
In the presence of, and ripple increase can also impact bus capacitor, reduce transducer effciency；The third method equally exists cut frequency reducing
The problem of ripple significantly becomes big under current transformer low frequency afterwards so that the strategy can not also greatly improve converter light-load efficiency.
Therefore it provides a kind of method that can greatly improve converter light-load efficiency has turned into those skilled in the art's urgency
The technical problem that need to be solved.The present invention summarizes the shortcoming and defect of existing phase cut control method, it is proposed that a kind of micro-capacitance sensor storage
Can two way convertor efficiency optimization control method in system, this method is using six intersecting shift two way convertor Buck patterns to grind
Study carefully object, propose loss and the efficiency evaluation model changed based on load current, draw out load current and work number of phases phase
The numerical tabular matched somebody with somebody, by tabling look-up and digital operation, assesses the minimum power loss of the load current, with the conditions of realizing underloading
Optimal cut point is accurately automatically selected, reaches and widens the interval purpose of current transformer high-efficiency operation；For current transformer after cut
The problem that ripple deteriorates, introduces phase shift integrated magnetic, while realizing cut optimization efficiency by phase shifting control, still protects
Hold the multiplex advantage of multiphase Interleaved control；By multiphase magnetic technology technical optimization phase current ripple pulse, reduction volume and
Magnetic part is lost, and further improves light-load efficiency space.
The content of the invention
The present invention is relatively low to solve two way convertor light-load efficiency in current micro-grid energy storage system, and traditional cut
There is provided two way convertor efficiency-optimization control side in a kind of micro-grid energy storage system for the easy problem for causing ripple to deteriorate of control
Method.During for current transformer underloading, in the case that cut to only two passages is run, conventional method can not further optimize
The defect of efficiency, conversion efficiency when current transformer is gentlier loaded can further be optimized by introducing multiple degrees of freedom frequency modulation control；By moving
Phase magnetic is integrated and frequency modulation modulates the mode being combined, and realizes the phase cut control of converter low ripple, reaches current transformer total power model
Interior efficiency optimization is enclosed, current transformer Effec-tive Function interval has greatly been expanded, has improved energy-storage system or even micro-grid system
Efficiency.
To achieve these goals, the technical scheme is that：
Two way convertor efficiency optimization control method in a kind of micro-grid energy storage system, including one or more two-way changes
Device and distributed battery energy-storage module are flowed, the two way convertor uses 6 staggered two way convertor main circuit topology knots in parallel
Structure, its efficiency optimization control method comprises the following steps：
(1) the loss distribution in the range of analysis current transformer full power duty, the especially loss characteristics under light-load mode, structure
Build the loss model of efficiently and accurately, it is contemplated that each channel characteristic of two way convertor and work essentially equal that Multiphase Parallel is interlocked,
Its loss model of analyzing and researching is carried out by a phase and exemplified by working in Buck patterns, and deduces out current transformer total power dissipation；
The current transformer total power dissipation includes the conduction loss P of power switch pipeon,The pole of afterflow two
Pipe D2Power attenuation PSW-D2(CCM)=0.5VDNtoverIoF, switching tube S1Loss
And the switching loss of parasitic diode
(2) the optimization Steinmetz models for considering circuit loss and magnetic circuit loss are set up, and derive that it optimizes
Expression formula is lost：In the optimization loss expression formula, KFe, the coefficient such as α, β can pass through magnetic core
The inquiry of specification is obtained, BMAXFor magnetic saturation intensity peak value, f is excitation frequency；
(3) Matlab softwares are used, each several part switching loss in the current transformer total power dissipation is emulated according to classified variable
Formula, obtains the loss threedimensional model of correspondence load current and switching frequency, analyzes its loss distribution；
(4) loss and load current under the correspondence work number of phases are set up according to the current transformer total power dissipation characteristic distributions
Relation curve, associate, cut using the inessential work number of phases under underloading electric current is cut off with the intrinsic characteristic of frequency with reference to loss
The control method for frequency of phase control method and multiple degrees of freedom frequency modulation, seeks optimization work frequency under the correspondence number of phases and load current
Rate；
Using the emulation module based on Matlab, output current ripple Δ I total to current transformeroWith work number of phases N relation
Knowable to being emulated, ripple is significantly increased after cut, and current transformer loses the multiplex advantage of Interleaved control；
(5) phase angle being respectively conducted repeatedly is adjusted while cut under underloading electric current, makes current transformer in phase cut control
While continue to retain the advantage of crisscross parallel, improve current ripples, further optimization current transformer Effec-tive Function is interval；Become
Stream device full-load run be conducted in six, each main switch successively interlock 60 ° of phase angle break-makes, when load current be reduced to it is fully loaded
When 5/6, a phase is cut away, and adjusts conduction phase in real time, the staggeredly 72 ° of phase angles conductings successively of five phase current transformers are realized, to retain five
Staggered parallel running, obtains the advantage of low ripple, and with the reduction of current transformer load continuous, above-mentioned cut and phase shift are performed successively
Control, finally realizes the optimal work number of phases and highest operational efficiency；
(6) after phase cut control and multiple degrees of freedom frequency modulation control is imposed, the problem of deteriorating for ripple, using electric two-by-two
Feel the crisscross parallel magnetic Integrated design of reverse coupled, further to improve the increase of underloading ripple current, converter is realized in maximization
Full power range high-efficiency operation.
Current ripples when carrying out cut for the crisscross parallel Buck current transformers using phase shifting control carry out emulation can
Know, compared with not using the ripple current of phase shifting control, during current transformer underloading cut, by modulated in real time conduction phase, can protect
Crisscross parallel is stayed to control the advantage of low ripple.
Six staggered current transformer experimental prototypes are designed, and build experimental circuit system and verify the efficiency-optimization control side
The correctness of method.
Further, the two way convertor main circuit topology is defeated by 6 single channel non-isolation type Boost-Buck parallel connections
Enter to form and using Interleaved control technological maheup multiphase Interleaved control type current transformer.
Further, the phase cut control method is the efficiency Model by being lost based on load current, is calculated current
The work number of phases of minimal losses can be obtained under light-load conditions, then cuts off by Digital Control unnecessary conducting phase automatically
It is interval that number improves converter high-efficiency operation to reduce its working loss.
Further, the control method for frequency of the multiple degrees of freedom frequency modulation is just implemented when current transformer runs on two passages.
Further, the multiphase Interleaved control type current transformer is using the integrated principle design coupling inductance of magnetic, with further
Improve steady-state current ripple after cut and frequency reducing control, and improve dynamic responding speed simultaneously.
Further, the multiphase Interleaved control type current transformer is using the integrated principle design coupling inductance of magnetic.
Further, the coupling inductance is constructed by the way of one group two-by-two.
, will be traditional light the invention discloses two way convertor efficiency optimization control method in a kind of micro-grid energy storage system
Carry phase cut control and multiple degrees of freedom frequency modulation control combines, and introduce phase shift magnetic technology technology, greatly expand two way convertor
High-efficiency operation is interval, improves the stability of a system and reliability.The invention has the advantages that：
(1) by setting up more accurate reliable load current loss model, load current and the work number of phases and frequency are disclosed
Between inherent mechanism, derive the corresponding load current of optimal cut point, it is easy to accomplish the automatic industrialization number of phases pipe of digitlization
Reason.
(2) threedimensional model of loss, electric current and frequency under the correspondence work number of phases is established, using multiple degrees of freedom frequency control
System strategy, seeks optimization work frequency under the correspondence number of phases and load current, has reached that higher efficiency in the case of underloading is run
Control targe.
(3) introduce phase shift magnetic Integrating controls strategies, maintain current transformer still possess while cut it is how staggered simultaneously
The multiplex low ripple output advantage of connection, while coupling inductance design improves steady-state behaviour and power density values, being capable of highest
The efficiency improved in full-load range of degree, while extending the service life of current transformer.
Brief description of the drawings
Fig. 1 is micro-capacitance sensor and energy-storage system structure chart；
Fig. 2 is 6 staggered two way convertor main circuits in parallel；
Fig. 3 is that distribution and parasitic parameter structure chart is lost in single-phase Buck current transformers；
Fig. 4 is single-phase Buck current transformers each several part power attenuation illustraton of model；
Fig. 5 is the number of phases control flow chart based on loss model；
Fig. 6 is multiple degrees of freedom frequency modulation control flow chart；
Fig. 7 is output current ripple comparison diagram under the work number of phases；Wherein Fig. 7 a are output current line under four phase running statuses
Ripple comparison diagram, Fig. 7 b are output current ripple comparison diagram under single-phase operation state；
Fig. 8 is 6 intersecting shift Buck converter switches logic charts；
Fig. 9 is output current ripple comparison diagram under the number of phases that worked after phase shifting control；Wherein Fig. 9 a are four-way conducting state
Lower output current ripple comparison diagram, wherein Fig. 9 b are output current ripple comparison diagram under triple channel conducting state；
Figure 10 is 6 intersecting shift Buck converters 1-4,2-5,3-6 phases coupled modes figure two-by-two；
Figure 11 is experimental circuit system diagram；
Figure 12 is traditional crisscross parallel output current of converter ripple figure；Wherein Figure 12 a are six to be conducted running current line
Ripple figure, Figure 12 b are two-phase operation current ripples figure；
Figure 13 is output current ripple figure after cut under current transformer frequency modulation control；Wherein Figure 13 a are six to be conducted operation shape
Output current ripple figure after cut under state, Figure 13 b are two to be conducted output current ripple figure after the cut under running status；
Figure 14 is that current transformer frequency modulation adds the integrated cut output current ripple figure of phase shift magnetic；Wherein Figure 14 a are conducted for six
Cut output current ripple figure under running status, Figure 14 b are the two cut output current lines being conducted under operation running status
Ripple figure；
Figure 15 is using the efficiency curve diagram after optimal control method of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
His embodiment, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Two way convertor efficiency optimization control method in a kind of micro-grid energy storage system, as shown in figure 1, micro-capacitance sensor energy storage
System include one or more two way convertors and distributed battery energy-storage module, the two way convertor using 6 it is staggered simultaneously
Join two way convertor main circuit topological structure, as shown in Fig. 2 its efficiency optimization control method comprises the following steps：
(1) the loss distribution in the range of analysis current transformer full power duty, the especially loss characteristics under light-load mode, structure
Build the loss model of efficiently and accurately, it is contemplated that each channel characteristic of two way convertor and work essentially equal that Multiphase Parallel is interlocked,
Its loss model of analyzing and researching is carried out by a phase and exemplified by working in Buck patterns, and deduces out current transformer total power dissipation；Such as
Fig. 3 show its topological parasitic parameter structure of single-phase unsteady flow and loss distribution, its drive loss PdrivingExpression formula be：
Pdriving=Vg×Qg×fsw
In formula, VgRepresent gate voltage, QgRepresent gate pole total current capacity, fswRepresent switching frequency；
The current transformer total power dissipation includes the conduction loss P of power switch pipeon,Fly-wheel diode
D2Power attenuation PSW-D2(CCM)=0.5VDNtoverIoF, switching tube S1Loss
And the switching loss of parasitic diode
(2) the optimization Steinmetz models for considering circuit loss and magnetic circuit loss are set up, and derive that it optimizes
Expression formula is lost：In the optimization loss expression formula, KFe, the coefficient such as α, β can pass through magnetic core
The inquiry of specification is obtained, BMAXFor magnetic saturation intensity peak value, f is excitation frequency；
(3) Matlab softwares are used, each several part switching loss in the current transformer total power dissipation is emulated according to classified variable
Formula, obtains the loss threedimensional model of correspondence load current and switching frequency as shown in figure 4, analyzing its loss distribution；
(4) loss and load current under the correspondence work number of phases are set up according to the current transformer total power dissipation characteristic distributions
Relation curve, associate, cut using the inessential work number of phases under underloading electric current is cut off with the intrinsic characteristic of frequency with reference to loss
The control method for frequency of phase control method and multiple degrees of freedom frequency modulation, seeks optimization work frequency under the correspondence number of phases and load current
Rate；
Using the emulation module based on Matlab, output current ripple Δ I total to current transformeroWith work number of phases N relation
Carry out emulation as shown in Figure 7 and understand that ripple is significantly increased after cut, and current transformer loses the multiplex advantage of Interleaved control；
(5) phase angle being respectively conducted repeatedly is adjusted while cut under underloading electric current, makes current transformer in phase cut control
While continue to retain the advantage of crisscross parallel, improve current ripples, further optimization current transformer Effec-tive Function is interval；According to
Six phases Buck current transformer main switch on-off logics as shown in Figure 8, i.e. current transformer full-load run is conducted in six, each main switch
60 ° of phase angle break-makes of interlocking successively are managed, when load current is reduced to fully loaded 5/6, a phase, and the phase of regulation conducting in real time are cut away
Position, realizes the staggeredly 72 ° of phase angles conductings successively of five phase current transformers, to retain five staggered parallel runnings, obtains the excellent of low ripple
Gesture, with the reduction of current transformer load continuous, performs above-mentioned cut and phase shifting control, finally realizes the optimal work number of phases and most successively
High operational efficiency；
Current ripples when carrying out cut for the crisscross parallel Buck current transformers using phase shifting control are carried out such as Fig. 9 institutes
The emulation shown is understood, compared with not using the ripple current of phase shifting control, during current transformer underloading cut, is led by modulated in real time
Logical phase, can retain the advantage that crisscross parallel controls low ripple.
(6) after phase cut control and multiple degrees of freedom frequency modulation control is imposed, the problem of deteriorating for ripple, using electric two-by-two
Feel the crisscross parallel magnetic Integrated design of reverse coupled, further to improve the increase of underloading ripple current, converter is realized in maximization
Full power range high-efficiency operation.
Six staggered current transformer experimental prototypes are designed, and build experimental circuit system as shown in figure 11, the efficiency is verified
The correctness of optimal control method.
As shown in Fig. 2 the two way convertor main circuit topology is in parallel by 6 single channel non-isolation type Boost-Buck
Input is formed and using Interleaved control technological maheup multiphase Interleaved control type current transformer.
It is illustrated in figure 5 and the work number of phases control flow chart based on loss model, the cut control is shown based on Fig. 4
Method processed is the efficiency Model by being lost based on load current, and minimum damage can be obtained by calculating under current light-load conditions
The work number of phases of consumption, then by Digital Control cut off the unnecessary conducting number of phases automatically to reduce its working loss to improve change
Parallel operation high-efficiency operation is interval.
Internal association mechanism based on the loss disclosed in loss model in Fig. 5 and frequency, the present invention proposes multiple degrees of freedom
The control method of frequency modulation, it controls thinking and principle as shown in fig. 6, being equal to institute in the multiple degrees of freedom frequency modulation control principle
The phase cut control stated, the control method for frequency of the multiple degrees of freedom frequency modulation is just implemented when current transformer runs on two passages, together
When, the requirement of two passages operation also just carries for the Ripple Suppression strategy of taking phase shift magnetic integrated after phase cut control in the present invention
Condition is supplied, because when current transformer uses integrated coupling inductance, at least need two-phase to work simultaneously.
The multiphase Interleaved control type current transformer is using the integrated principle design coupling inductance of magnetic, further to improve cut
And steady-state current ripple after frequency reducing control, and dynamic responding speed is improved simultaneously.
The coupling inductance is using one group of coupled modes are constructed two-by-two as shown in Figure 10, and which is easy to keep
Magnetic circuit flux symmetrical, and phase cut control is conveniently imposed when can realize underloading, i.e., switch to 4 phases and 2 phases according to load current reduction
Operation.
According to circuit general principle, use the voltage equation expression formula of inductance after coupling inductance for：
In formula, M is the mutual inductance between coupling inductance two-by-two, and L is six phase main inductances from inductance value.
Non-coupled inductance and two-by-two the first phase steady-state current ripple Δ I under coupling inductance can be tried to achieve1With Δ I '1Expression formula point
It is not：
In formula, Leq1For using the equivalent steady state inductance of coupling inductance, its expression formula is as follows：
K=M/L represents the coefficient of coup, -0.5 ＜ k ＜ 0 in formula；
Analyze Δ I1With Δ I '1Expression formula understands that the steady-state current ripple of the first phase is significantly less than non-coupling under coupling inductance
Close inductance, it was demonstrated that magnetic Integrated design can further reduce steady-state current ripple, suppress the ripple that cut and frequency modulation control are brought
The problem of deterioration.
The six staggered current transformer experimental prototype parameter is：Input Vin=400V, exports Vout=50V, six is mutually total defeated
Go out electric current Iout=60A, switching frequency is fS=150kHz, inductance parameters are L1=L2=L3=L4=L=30.8 μ H.Power
Switching tube and diode use SIC devices entirely, and outlet side filter capacitor is Csc=42mF.
Current transformer uses and realizes closed-loop control based on DSP28335 digital control chips, the common phase cut control of current transformer
Steady state ripple experimental result is as shown in figure 12, using Steady Experimental result such as Figure 13 after multiple degrees of freedom frequency modulation control of the present invention
It is shown, add the Steady Experimental result after the integrated control of phase shift magnetic as shown in figure 14 using frequency modulation control of the present invention, contrast is understood,
After magnetic technology design and phase shifting control, output current ripple during converter underloading cut is significantly improved, and is remained staggeredly
The technical advantage of parallel-connection multiple low ripple, experimental result is consistent with simulation result described above and theory analysis.
It is using the efficiency curve after efficiency optimization control method of the present invention as shown in figure 15, it was demonstrated that proposed by the present invention
The integrated underloading phase cut control of phase shift magnetic can greatly improve current transformer conversion efficiency, greatly expand its high-efficiency operation interval, real
High-efficiency operation in the range of existing current transformer full power duty.
Claims (7)
1. a kind of two way convertor efficiency optimization control method in micro-grid energy storage system, it is characterised in that the micro-capacitance sensor storage
Energy system includes one or more two way convertors and distributed battery energy-storage module, and the two way convertor is staggered using 6
Two way convertor main circuit topological structure in parallel, its efficiency optimization control method is realized by following steps：
(1) the loss distribution in the range of analysis current transformer full power duty, the especially loss characteristics under light-load mode, build efficient
Accurate loss model, it is contemplated that each channel characteristic of two way convertor and work essentially equal that Multiphase Parallel is interlocked, with a phase
And work in its loss model of analyzing and researching is carried out exemplified by Buck patterns, and deduce out current transformer total power dissipation, the unsteady flow
Device total power dissipation includes conduction loss, fly-wheel diode power attenuation, the loss of switching tube and the parasitism of power switch pipe
The switching loss of diode；
(2) the optimization Steinmetz models for considering circuit loss and magnetic circuit loss are set up, and derive that it optimizes attrition table
Up to formula：
(3) Matlab softwares are used, each several part switching loss formula in the current transformer total power dissipation is emulated according to classified variable,
The loss threedimensional model of correspondence load current and switching frequency is obtained, its loss distribution is analyzed；
(4) relation of loss and load current under the correspondence work number of phases is set up according to the current transformer total power dissipation characteristic distributions
Curve, is associated with reference to loss with the intrinsic characteristic of frequency, using the phase cut control of the inessential work number of phases under excision underloading electric current
The control method for frequency of method and multiple degrees of freedom frequency modulation, seeks optimization work frequency under the correspondence number of phases and load current；
(5) phase angle being respectively conducted repeatedly is adjusted while cut under underloading electric current, makes current transformer in the same of phase cut control
Shi Jixu retains the advantage of crisscross parallel, improves current ripples, and further optimization current transformer Effec-tive Function is interval；
(6) after phase cut control and multiple degrees of freedom frequency modulation control is imposed, the problem of deteriorating for ripple is reverse using inductance two-by-two
The crisscross parallel magnetic Integrated design of coupling, further to improve the increase of underloading ripple current, converter total power is realized in maximization
Scope high-efficiency operation；
Finally, verify that efficiency described above is excellent by designing six staggered current transformer experimental prototypes, and building experimental circuit system
Change the correctness of control method.
2. two way convertor efficiency optimization control method in micro-grid energy storage system according to claim 1, its feature exists
In the two way convertor main circuit topology is formed and using friendship by 6 single channel non-isolation type Boost-Buck parallel connection inputs
Wrong control technology constitutes multiphase Interleaved control type current transformer.
3. two way convertor efficiency optimization control method in micro-grid energy storage system according to claim 1, its feature exists
In the phase cut control method is the efficiency Model by being lost based on load current, and calculating can under current light-load conditions
To obtain the work number of phases of minimal losses, then the unnecessary conducting number of phases cut off by Digital Control automatically damaged to reduce its work
Consumption is interval to improve converter high-efficiency operation.
4. two way convertor efficiency optimization control method in micro-grid energy storage system according to claim 1, its feature exists
In the control method for frequency of the multiple degrees of freedom frequency modulation is just implemented when current transformer runs on two passages.
5. two way convertor efficiency optimization control method in micro-grid energy storage system according to claim 1, its feature exists
In the optimization efficiency control method on the basis of underloading imposes cut and multiple degrees of freedom frequency modulation, then carries out phase shift magnetic collection
Into strategy, phase shifting control and magnetic Integrated design further reduce the ripple deterioration problem after cut and frequency reducing.
6. two way convertor efficiency optimization control method in micro-grid energy storage system according to claim 2, its feature exists
In the multiphase Interleaved control type current transformer is using the integrated principle design coupling inductance of magnetic.
7. two way convertor efficiency optimization control method in micro-grid energy storage system according to claim 5, its feature exists
In the coupling inductance is constructed by the way of one group of coupled in reverse wi two-by-two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710377823.XA CN107332265A (en) | 2017-05-12 | 2017-05-12 | Two way convertor efficiency optimization control method in micro-grid energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710377823.XA CN107332265A (en) | 2017-05-12 | 2017-05-12 | Two way convertor efficiency optimization control method in micro-grid energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107332265A true CN107332265A (en) | 2017-11-07 |
Family
ID=60192866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710377823.XA Pending CN107332265A (en) | 2017-05-12 | 2017-05-12 | Two way convertor efficiency optimization control method in micro-grid energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107332265A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108551258A (en) * | 2018-03-28 | 2018-09-18 | 安徽工程大学 | A kind of RBF network monitoring system and methods of accumulator bidirectional DC-DC converter |
| CN108964510A (en) * | 2018-07-03 | 2018-12-07 | 华南理工大学 | A kind of multiphase alternate conduction current digital control method for laser load |
| CN109067176A (en) * | 2018-08-02 | 2018-12-21 | 哈尔滨工程大学 | A kind of DC/DC converter maximum induction electric current current-sharing control method |
| CN109120152A (en) * | 2018-08-07 | 2019-01-01 | 张锐明 | A kind of fuel cell low ripple efficient energy control device and method |
| CN110661430A (en) * | 2019-09-16 | 2020-01-07 | 锐捷网络股份有限公司 | Power supply control method, device and medium of multiphase power supply |
| CN111585438A (en) * | 2020-06-22 | 2020-08-25 | 广东省大湾区集成电路与系统应用研究院 | Multiphase DCDC conversion control circuit and method |
| CN112424017A (en) * | 2018-07-26 | 2021-02-26 | 纬湃科技有限责任公司 | Device and method for adapting a direct intermediate circuit by changing the voltage and adapting the number of phases of a DC/DC converter |
| CN112910234A (en) * | 2019-12-04 | 2021-06-04 | 大众汽车股份公司 | Boost converter and method for operating a boost converter |
| CN113098250A (en) * | 2021-06-09 | 2021-07-09 | 深圳市赛迈科技有限公司 | Power supply circuit and vehicle-mounted power supply |
| CN113193748A (en) * | 2021-05-14 | 2021-07-30 | 河北工业大学 | TCM control-based optimization method for interleaved Buck/Boost converters |
| CN114362519A (en) * | 2021-12-31 | 2022-04-15 | 华中科技大学 | Efficiency optimization method and system for two-phase interleaved parallel DC-DC converter |
| WO2023201967A1 (en) * | 2022-04-19 | 2023-10-26 | 株洲中车时代电气股份有限公司 | Multi-coupled chopper converter, control method, and power supply device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364861A (en) * | 2011-10-27 | 2012-02-29 | 上海大学 | Control device and method for interleaved parallel LLC (Logical Link Control) resonant converter |
-
2017
- 2017-05-12 CN CN201710377823.XA patent/CN107332265A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364861A (en) * | 2011-10-27 | 2012-02-29 | 上海大学 | Control device and method for interleaved parallel LLC (Logical Link Control) resonant converter |
Non-Patent Citations (1)
| Title |
|---|
| 郭瑞等: "《一种多相交错并联磁耦合双向直流变换器效率优化策略》", 《电工电能新技术》 * |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108551258A (en) * | 2018-03-28 | 2018-09-18 | 安徽工程大学 | A kind of RBF network monitoring system and methods of accumulator bidirectional DC-DC converter |
| CN108551258B (en) * | 2018-03-28 | 2023-08-04 | 安徽工程大学 | RBF network supervision system and method of bidirectional DC-DC converter for storage battery |
| CN108964510A (en) * | 2018-07-03 | 2018-12-07 | 华南理工大学 | A kind of multiphase alternate conduction current digital control method for laser load |
| CN108964510B (en) * | 2018-07-03 | 2020-02-18 | 华南理工大学 | Multiphase alternating conduction current digital control implementation method for laser load |
| CN112424017A (en) * | 2018-07-26 | 2021-02-26 | 纬湃科技有限责任公司 | Device and method for adapting a direct intermediate circuit by changing the voltage and adapting the number of phases of a DC/DC converter |
| CN109067176A (en) * | 2018-08-02 | 2018-12-21 | 哈尔滨工程大学 | A kind of DC/DC converter maximum induction electric current current-sharing control method |
| CN109067176B (en) * | 2018-08-02 | 2020-04-07 | 哈尔滨工程大学 | Current sharing control method for maximum inductive current of DC/DC converter |
| CN109120152A (en) * | 2018-08-07 | 2019-01-01 | 张锐明 | A kind of fuel cell low ripple efficient energy control device and method |
| CN109120152B (en) * | 2018-08-07 | 2021-01-05 | 张锐明 | Low-ripple high-efficiency energy control device and method for fuel cell |
| CN110661430A (en) * | 2019-09-16 | 2020-01-07 | 锐捷网络股份有限公司 | Power supply control method, device and medium of multiphase power supply |
| CN112910234A (en) * | 2019-12-04 | 2021-06-04 | 大众汽车股份公司 | Boost converter and method for operating a boost converter |
| CN111585438B (en) * | 2020-06-22 | 2021-02-12 | 广东省大湾区集成电路与系统应用研究院 | Multiphase DCDC conversion control circuit and method |
| CN111585438A (en) * | 2020-06-22 | 2020-08-25 | 广东省大湾区集成电路与系统应用研究院 | Multiphase DCDC conversion control circuit and method |
| CN113193748A (en) * | 2021-05-14 | 2021-07-30 | 河北工业大学 | TCM control-based optimization method for interleaved Buck/Boost converters |
| CN113193748B (en) * | 2021-05-14 | 2022-05-17 | 河北工业大学 | TCM control-based optimization method for interleaved Buck/Boost converters |
| CN113098250A (en) * | 2021-06-09 | 2021-07-09 | 深圳市赛迈科技有限公司 | Power supply circuit and vehicle-mounted power supply |
| CN114362519A (en) * | 2021-12-31 | 2022-04-15 | 华中科技大学 | Efficiency optimization method and system for two-phase interleaved parallel DC-DC converter |
| CN114362519B (en) * | 2021-12-31 | 2023-10-24 | 华中科技大学 | Efficiency optimization method and system for two-phase staggered parallel DC-DC converter |
| WO2023201967A1 (en) * | 2022-04-19 | 2023-10-26 | 株洲中车时代电气股份有限公司 | Multi-coupled chopper converter, control method, and power supply device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107332265A (en) | Two way convertor efficiency optimization control method in micro-grid energy storage system | |
| CN106877676B (en) | A kind of two-way resonance translation circuit, converter and its control method | |
| CN102201739B (en) | Symmetrical half-bridge LLC resonant bidirectional DC-DC converter | |
| CN101814827B (en) | Two-stage type DC converter with high voltage input and low-voltage large current output | |
| CN103944397B (en) | Boost type isolated DC/DC converter and control method thereof | |
| Qiao et al. | Analysis of buck-boost converters for fuel cell electric vehicles | |
| CN105262339B (en) | A kind of wide gain synchronous rectification H bridge two-way DC converters | |
| CN106936319B (en) | Isolated three-port bidirectional DC-DC converter | |
| CN112054691B (en) | Single-stage voltage-regulating conversion circuit sharing rectification structure and control method | |
| CN110212802A (en) | A kind of high pressure, wide range input voltage feed-back type DC Electronic Loads circuit | |
| CN107395010A (en) | For energy-storage system crisscross parallel switching capacity molded breadth gain two-way DC converter | |
| CN107769573A (en) | The WPT system constant current constant voltage of bilateral LCC networks exports adjustable parameter setting method | |
| CN107612325A (en) | One kind switchs the quasi- wide gain two-way DC converter in Z sources | |
| CN109361255B (en) | Charge-discharge circuit topology based on motor winding open circuit | |
| CN105141135B (en) | The control method of multi-channel parallel full-bridge LLC converters in a kind of cascading power source system | |
| CN103036433A (en) | Control method of two-way direct current conversion device | |
| CN112398346B (en) | Bidirectional converter topology | |
| CN106685191A (en) | Multi-mode control method and device | |
| CN107070223A (en) | A kind of two-way DC/DC converters of the high-power high step-up ratio of non-isolation type and control method | |
| CN107968471A (en) | LCLC resonance circuits, wide scope constant power output direct current charger and control method | |
| CN101534054A (en) | Single-isolation combination pressure increase and reduction type multi-input direct current converter | |
| CN106787775A (en) | A kind of bidirectional, dc converter and its control method | |
| CN206389297U (en) | A kind of bullet train AuCT | |
| CN107681886A (en) | Self-balancing non-isolation type modular multilevel DC DC converters | |
| CN103825454B (en) | A kind of three level DC converting means and use the transformation of electrical energy method of this device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171107 |
|
| RJ01 | Rejection of invention patent application after publication |