CN106230079A - Split-phase type low-power consumption energy accumulation current converter and control method thereof and control system - Google Patents
Split-phase type low-power consumption energy accumulation current converter and control method thereof and control system Download PDFInfo
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- CN106230079A CN106230079A CN201610651157.XA CN201610651157A CN106230079A CN 106230079 A CN106230079 A CN 106230079A CN 201610651157 A CN201610651157 A CN 201610651157A CN 106230079 A CN106230079 A CN 106230079A
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Classifications
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- H02J7/022—
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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
- 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
Abstract
The invention discloses a kind of split-phase type low-power consumption energy accumulation current converter and control method thereof and control system, current transformer includes AC/DC conversion module, DC/DC conversion module and storage bodies, three-phase alternating current connects the input of AC/DC conversion module, AC/DC conversion module is four line star connection or three line angles connection structure, the outfan of AC/DC conversion module connects the input of DC/DC conversion module, the outfan of DC/DC conversion module connects storage bodies, storage bodies includes the first storage bodies and second storage bodies of concatenation, and the negative pole end of the first storage bodies connects the positive terminal of the second storage bodies.The DC/DC conversion section of current transformer uses the topological structure that can realize battery modules redundancy and series connection that can create, and reduces the system restriction to DC voltage fluctuation.And the power switch of DC/DC conversion module is without need not full-time in high frequency state, the efficiency of the bigger system that improves, and reduces power attenuation.
Description
Technical field
The present invention relates to circuit engineering field, specifically a kind of split-phase type low-power consumption energy accumulation current converter and control method thereof with
Control system.
Background technology
Along with expanding economy, the increase of population, and the fossil class energy is few, and various countries start to focus on regenerative resource
Development.But the development of the new forms of energy such as wind energy, solar energy, invariably receives the impact of the condition such as geographical position, weather, causes
Wind energy and solar energy have the strongest intermittence, and in order to maximum utilizes wind energy and solar energy, it is the most reasonable that energy storage becomes one
Solution.
In existing energy storage technology scheme, comprise two crucial equipment of comparison: battery and energy accumulation current converter.The merit of battery
Exactly energy can be stored, and current transformer is for connection to the equipment between battery and electrical network.And what this patent related to
Technical field is exactly mainly bidirectional energy-storage current transformer, but is not limited to bidirectional energy-storage current transformer.
In photovoltaic generating system and energy-storage system, two-way DC-DC converter is all an indispensable part,
The indices of two-way DC-DC converter directly influences the performance of total system, and the advantage of same new energy resources system is also
Can have a greatly reduced quality.Under the fast development of new forms of energy, the performance of two-way DC-DC converter is also constantly being improved, along with
The difference of application scenarios it is also proposed more competitive design.Since eighties of last century, American scholar first proposed
The two-way DC-DC converter of buck, and be applied in satellite sun energy power-supply system.The professor of Hong Kong University and
The scholar of Australia proposes the topological structure of multiple two-way DC-DC converter the most in succession.Virginia, US later
Scholar begin one's study two-way DC-DC converter be applied in battery energy storage system.
Battery energy storage system can carry out power adjustments and energy adjustment according to the size of capacity, is not special in response speed
Not high occasion, it is also possible to quickly respond, has short-duration power, stabilizes power swing, improves microgrid power grid quality, raising system
Stability etc. act on, and are therefore widely used.Distributed battery energy storage is strengthening micro-grid system operation stability and is carrying
High quality of power supply aspect has bigger advantage, and energy storage device is not known in the requirement run according to system, can preferably be controlled
Effect processed, the research of current battery energy-storage system is increasingly paid attention to.
Battery energy storage system includes battery and management system thereof and two parts of energy conversion system.Energy conversion system is made
For the interface of battery Yu electrical network, in the light of actual conditions store and release energy, it is achieved energy exchange between electrical network and battery,
Its essence is exactly powerful energy accumulation current converter.
The structure of battery energy storage Bears is by battery and battery management system (BBMS, Battery and Battery
Management System) and energy conversion and two part groups of control system (PCS, Power Conversion System)
Becoming, battery is by PCS and the electrical network amount of carrying out exchange, and PCS is energy storage and just leaves away, as the interface between accumulator and electrical network
Equipment, controls battery energy storage or releases energy.
Energy accumulation current converter achieves the bidirectional energy exchange between direct current and exchange and transmission, its substantially voltage transformation
Device, reaches to inject to electrical network or absorb to gain merit and idle by changing energy storage changer AC voltage magnitude and voltage phase angle
The purpose of power.When the voltage phase angle controlling energy-storage system is ahead of the voltage phase angle of access point, active power becomes energy storage
System is flowed into access point；Vice versa.But need, when system injects reactive power, just to control the voltage amplitude of energy accumulation current converter
Value is more than the voltage magnitude of access point, and reactive power is just flowed into access point by battery energy storage system, and vice versa.Visible, suitable
When the controlled quentity controlled variable changing current transformer both can control between energy-storage system and electrical network meritorious and idle.Work at energy-storage system
During, energy accumulation current converter decides the efficiency of whole system as the interface equipment between battery and electrical network, its topological structure
And cost, it is the key factor affecting systematic economy reliability service.Owing to the topological structure of energy storage inverter is of a great variety, performance
Different, its principle analysis and Performance comparision, rationally selection, raising system effectiveness and reduction production cost etc. for structure have
Extremely important meaning.Energy accumulation current converter can be divided into single stage type and stage type two kinds, topological structure according to or without DC/DC link
On difference cause both difference in operating characteristic.
Single stage type energy accumulation current converter directly utilizes DC/AC current transformer and battery is exported energy is delivered to electrical network, it is only necessary to one
The transformation of electrical energy of level just can realize.During work, under discharge condition, the electric energy of battery energy storage is friendship by DC/AC current transformer inversion
Flow back to be fed to electrical network, otherwise line voltage stores in the battery after over commutation becomes direct current in the charge state.DC/AC module
Rectification state can be operated in can also work inverter mode, thus realize the two-way flow of energy.
Single stage type energy accumulation current converter topology has many good qualities, as simple in circuit, components and parts are few, control method is simple, reliable
Property high and high efficiency, the advantage such as low in energy consumption, but in use, there is certain deficiency in single stage type energy accumulation current converter:
1, needing the capacity of the capacity configuration battery according to current transformer, after each Converter Capacity is fixing, the battery of configuration holds
Amount can not change substantially.
2, a current transformer can only connect a road battery, is necessary for configuring equal number of energy storage and becomes when there is multichannel battery
Stream device, also can increase difficulty to control system while increasing cost.
3, in current transformer DC voltage to be limited in a higher scope, therefore the voltage of battery can not be the lowest, limit
Make the working range of cell voltage.
4, when current transformer accesses jumbo battery, it is impossible to carry out the equilibrium of voltage and current, also cannot realize charge and discharge
The independent control of electricity.
5, after current transformer breaks down, accessed battery all can quit work, and circuit reliability is relatively low.
6, when grid side breaks down, it is possible to produce larger current at PCS DC side, battery system is had relatively favourable opposition
Hit, cause the damage of set of cells and shorten its life-span.
For energy hole the most flexibly, use two-stage energy conversion system, become twin-stage current transformer.Prime is DC/
DC changer, is used for realizing voltage swing regulation and charge/discharge current controls.Rear class is DC/AC changer, is used for realizing output
The sineization of electric current and carry out cutting-in control.Difference according to control mode, it is also possible to realize controlling charge/discharge current,
The function of island effect detection.This configuration simplifies the control difficulty of every one-level, system can be controlled decoupling, make direct current become
The separately design of ring change joint and the control target of AC/DC link and means.Control system is easier design and realizes, but
Comparing single-stage current transformer to compare, device for power switching is more, and the loss caused increases, and reduces the efficiency of system.Bipolar system becomes
The DC converting structure of parallel operation can be divided into: isolated and non-isolated two kinds of structures.Topological structure with isolating transformer
Middle DC converter is connected with inverter by transformator.Transformator can play boosting and the effect of isolation, owing to isolation becomes
The introducing of depressor adds cost and the volume of system, also reduces energy conversion efficiency.Non-isolation type direct-current converter is general
Comprise three kinds of main topology: semi-bridge type, bridge-type and Buck-Boost cascade connection type, also refer in some documents
Non-mainstream circuit structure.The weak point of non-isolation type direct-current converter is that change in voltage can not be too big, but from improving energy
From the perspective of amount conversion efficiency, it is particularly suited for simple or coordinates new forms of energy to access battery energy storage system.Traditional energy storage becomes
Stream device uses three-phase bridge structure, when administering unbalanced power, has some limitations.Therefore employing phase separation structure can
Effectively to administer three-phase imbalance.
Summary of the invention
This patent is aiming at traditional two-level two-direction current transformer, and cannot to adapt to battery DC voltage fluctuation range bigger
Limit relatively, the problem that the redundancy of battery, overall system efficiency are relatively low cannot be realized, twin-stage based on half-bridge to tradition single-phase with
The structure of three-phase two way convertor is improved, and is simultaneously based on this structure and proposes the control strategy of innovation, can bigger raising
The efficiency of system.
The purpose of the present invention is achieved through the following technical solutions:
A kind of split-phase type low-power consumption energy accumulation current converter, it includes AC/DC conversion module, DC/DC conversion module and storage bodies,
Three-phase alternating current connects the input of AC/DC conversion module, and the outfan of AC/DC conversion module connects the defeated of DC/DC conversion module
Entering end, the outfan of DC/DC conversion module connects storage bodies, and storage bodies includes the first storage bodies and second storage bodies of concatenation,
The negative pole end of the first storage bodies connects the positive terminal of the second storage bodies, wherein:
AC/DC conversion module includes that three-phase bridge rectifier circuit, described three-phase bridge rectifier circuit include that the first power is opened
Guan Guan, the second power switch pipe, the 3rd power switch pipe, the 4th power switch pipe, the 9th power switch pipe, the tenth power switch
Pipe, the 11st power switch pipe, the 12nd power switch pipe, the 13rd power switch pipe, the 14th power switch pipe, the 15th
Power switch pipe and the 16th power switch pipe；The circuit structure of described AC/DC conversion module is:
Described three-phase alternating current is four line stars when connecing: A phase with N line as exchanging input, and with the first power switch pipe, second
Power switch pipe, the 3rd power switch pipe, the 4th power switch pipe composition bridge rectifier, its DC output side connects DC/
The input of DC conversion module；B phase with N line as exchanging input, and with the 9th power switch pipe, the tenth power switch pipe,
11 power switch pipes, the 12nd power switch pipe composition bridge rectifier, its DC output side connects DC/DC conversion module
Input；C phase with N line as exchanging input, and with the 13rd power switch pipe, the 14th power switch pipe, the 15th merit
Rate switching tube, the 16th power switch pipe composition bridge rectifier, its DC output side connects the input of DC/DC conversion module
End；
Or,
Described three-phase alternating current is three line angles when connecing: A phase with B phase as exchanging input, and with the first power switch pipe, second
Power switch pipe, the 3rd power switch pipe, the 4th power switch pipe composition bridge rectifier, its DC output side connects DC/
The input of DC conversion module；B phase and C phase as exchanging input, and with the 9th power switch pipe, the tenth power switch pipe, the
11 power switch pipes, the 12nd power switch pipe composition bridge rectifier, its DC output side connects DC/DC conversion module
Input；C phase and A phase as exchanging input, and with the 13rd power switch pipe, the 14th power switch pipe, the 15th merit
Rate switching tube, the 16th power switch pipe composition bridge rectifier, its DC output side connects the input of DC/DC conversion module
End；
DC/DC conversion module includes the 5th power switch pipe, the 6th power switch pipe, the 7th power switch pipe, the 8th merit
Rate switching tube, the positive voltage output end of AC/DC conversion module connect respectively the 5th power switch pipe, the one of the 6th power switch pipe
End；The other end of the 5th power switch pipe: the low-voltage that one side takes back AC/DC conversion module by the 7th power switch pipe is defeated
Go out end, on the other hand connect the positive terminal of the first storage bodies；The other end of the 6th power switch pipe: on the one hand by the 8th power
Switching tube takes back the low-voltage output end of AC/DC conversion module, is on the other hand connected between the first storage bodies and the second storage bodies；
The negative pole end of the second storage bodies takes back the low-voltage output end of AC/DC conversion module.
Preferably, described storage bodies is dc-battery.
Preferably, described AC/DC conversion module also includes that the first filter capacitor, described first filter capacitor are connected to AC/DC
The DC output side Vc1 two ends of conversion module, are used for stabilizing DC voltage.
Preferably, described DC/DC conversion module also includes the first filter inductance and the second filter inductance, described first energy storage
The positive terminal of body connects the 5th power switch pipe and the 7th power switch pipe, described second energy storage respectively by the first filter inductance
The negative pole end of body takes back the low-voltage output end of AC/DC conversion module by the second filter inductance；First filter inductance and second
Filter inductance is used for smoothing current waveform, limits the sudden change of electric current.
Preferably, power switch pipe is IGBT or MOSFET, it is also possible to be other power switch realizing switching function
Pipe.
The control method of a kind of split-phase type low-power consumption energy accumulation current converter, based on split-phase type low-power consumption energy storage disclosed by the invention
Current transformer, it includes three kinds of mode of operations:
In mode of operation one, the 6th power switch pipe and the 8th power switch pipe are in normal off open state, the 5th power
Switching tube and the 7th power switch pipe are in alternating conductive state, and the first storage bodies and the second storage bodies are series connection, the two
Jointly participate in power change；Therefore voltage when global voltage will be higher than single one storage bodies participation work.The control of circuit
Make the most flexible, and the function that can realize is abundanter, reduce overall circuit function to single storage bodies voltage pulsation
Dependence, can single energy storage carry voltage relatively low when realize reactive-load compensation, harmonics restraint and normal power conversion, nothing
Need the transformator of AC.
In mode of operation two, the 6th power switch pipe is in normal off open state, and the 8th power switch pipe is in often conducting
State, the 5th power switch pipe and the 7th power switch pipe be in alternating conductive state, and the only first storage bodies participates in electric energy conversion；
Therefore when the second storage bodies breaks down or voltage reduces to 0, it is possible in incision mode of operation two, utilize the first storage bodies
Participate in energy conversion, do not interfere with circuit work.In mode of operation two, the second storage bodies passes through the second filter inductance and the 8th merit
Rate switching tube defines path, owing to the second storage bodies in this on off state is not involved in work, and is cutting this opening
The dump energy judging the second storage bodies before off status is relatively low, voltage is relatively low, open circuit or the artificial feelings excising the second storage bodies
Under condition, this mode of operation could be entered.So this branch road seems Guan Bi, but electric current or electric current be not less, permissible
Ignore.
In mode of operation three, the 5th power switch pipe and the 7th power switch pipe are in normal off open state, the 6th power
Switching tube and the 7th power switch pipe are in alternating conductive state, and the only second storage bodies participates in electric energy conversion.Due to this switch
The first storage bodies in state is not involved in work, and to judge the residue electricity of the first storage bodies before cutting this on off state
Measure too low, voltage is relatively low, in the case of open circuit or artificial excision the first storage bodies, could enter this on off state.So
This branch road seems Guan Bi, but electric current or electric current be not less, it is possible to ignore.
Preferably, mode of operation one includes two on off states:
First on off state: the 5th power switch pipe conducting, the 7th power switch pipe disconnects, the 6th power switch pipe and the
Eight power switch pipes owing to bearing backward voltage and in cut-off state, power flow direction by the first storage bodies, the second storage bodies, first
Filter inductance, the second filter inductance flow to the DC output side Vc1 of AC/DC conversion module；The electric current iL1 of the first filter inductance and
The electric current iL2 of the second filter inductance is identical, the most on a declining curve, and numerical value meets:Output electricity
Pressure Vc1=Vdc1+Vdc2；Wherein: Vdc1 is the voltage of the first storage bodies, Vdc2 is the voltage of the second storage bodies；
Second switch state: the 5th power switch pipe disconnects, the 7th power switch pipe conducting, the 5th power switch pipe and the
Eight power switch pipes owing to bearing backward voltage and in cut-off state, power flow direction by the first storage bodies, the second storage bodies to
One filter inductance, the second filter inductance are charged；The electric current iL1 of the first filter inductance and the electric current iL2 of the second filter inductance
Identical, the most in rising trend, numerical value meets:
More excellent, the control Target Min of definition DC output side voltage Vc1 is Vc1_Ref.min, the first switch shape
State and second switch state select according to DC output side voltage Vc1:
As Vdc1+Vdc2 > Vc1_Ref.min time, use single-stage control strategy mode, select the first on off state, this
Sample it is avoided that the frequent movement of power switch pipe, the bigger switching loss reducing power switch pipe, improve system
Efficiency；
As Vdc1+Vdc2=Vc1_Ref.min, circuit be switched to buck-boost work, the 5th power switch pipe and
7th power switch pipe is alternate conduction, and the first on off state and second switch state are alternately present.Now, the first filter inductance
Electric current iL1 and the electric current iL2 of the second filter inductance do not have interrupted situation, all the time in triangular wave state, define work
In pattern one, the switch periods of the 5th power switch pipe is T1, and the dutycycle of the 5th power switch pipe is D1, total following three kinds
The situation of electric current occurs:
1), as iL1=iL2 > 0 time, Vc1=/(1-D1)；
2), when iL1=iL2 < when 0, Vc1=/D1；
3), work as iL1=iL2, and when 0 value occurs alternatively up and down, energy Flow depends on that iL1=iL2 is to the time
Integration.If integrated value > 0, then power is flowed to the DC output side of AC/DC conversion module by the first storage bodies and the second storage bodies
Vc1, Vc1 are in rising trend；Otherwise, as iL1=iL2, to the integrated value of time, < 0, then power is by the direct current of AC/DC conversion module
Outlet side Vc1 charges to the first storage bodies and the second storage bodies, and the overall power of system is by exchanging lateral first storage bodies and the
Two storage bodies chargings, this system is operated in rectification state.
Preferably, mode of operation two includes two on off states:
3rd on off state: the 5th power switch pipe conducting, the 7th power switch pipe disconnects, the 6th power switch pipe and the
Seven power switch pipes are owing to bearing backward voltage and in cut-off state, power flow direction is flowed to AC/DC by the first storage bodies and converts mould
The DC output side Vc1 of block；The electric current iL1 of the first filter inductance is on a declining curve, and numerical value meets:Wherein:
Vdc1 is the voltage of the first storage bodies；
4th on off state: the 5th power switch pipe disconnects, the 7th power switch pipe conducting, the first storage bodies passes through power
Switching tube and the 8th power switch pipe form a current path, and the first storage bodies charges to the first filter inductance；First filtering
The electric current iL1 of inductance is in rising trend, and numerical value meets:
In mode of operation two, the 3rd on off state and the 4th on off state are alternately present.The electric current of the first filter inductance
IL1 does not haves interrupted situation, all the time in triangular wave state, second filter inductance connect the second storage bodies or due to fault
State, exits circuit work, and therefore iL2 is approximately 0, and in definition mode of operation two, the switch periods of the 5th power switch pipe is
T2, the dutycycle of the 5th power switch pipe is D2, and the situation of total following three kinds of electric currents occurs:
1), as iL1 > 0 time, Vc1=Vdc1/ (1-D2)；
2), when iL1 < when 0, Vc1=Vdc1/D2；
3), when iL1 occurs alternatively up and down in 0 value, energy Flow depends on the iL1 integration to the time.If integrated value >
0, then power is flowed to the DC output side Vc1 of AC/DC conversion module by the first storage bodies, and system is operated in inverter mode；Otherwise,
As iL1, to the integrated value of time, < 0, then power is charged to the first storage bodies by the DC output side Vc1 of AC/DC conversion module, is
System is operated in rectification state.
Preferably, mode of operation three includes two on off states:
5th on off state: the 6th power switch pipe conducting, the 8th power switch pipe disconnects, and power flow direction is by the second energy storage
Body and the second filter inductance flow to the DC output side Vc1 of AC/DC conversion module；The electric current iL2 of the second filter inductance is decline
Trend, numerical value meets:
6th on off state: the 6th power switch pipe disconnects, the 8th power switch pipe conducting, the second storage bodies is to the second filter
Ripple inductance is charged, and the electric current iL2 of the second filter inductance is in rising trend, and numerical value meets
In mode of operation three, the 5th on off state and the 6th on off state are alternately present.The electric current of the second filter inductance
IL2 does not haves interrupted situation, all the time in triangular wave state, first filter inductance connect the first storage bodies or due to fault
State, exits circuit work, and therefore iL1 is approximately 0, and in definition mode of operation three, the switch periods of the 6th power switch pipe 6 is
T3, the dutycycle of the 6th power switch pipe is D3, and the situation of total following three kinds of electric currents occurs:
1), as iL2 > 0 time, Vc1=Vdc2/ (1-D3)；
2), when iL2 < when 0, Vc1=Vdc2/D3；
3), when iL2 occurs alternatively up and down in 0 value, energy Flow depends on the iL2 integration to the time.If integrated value >
0, then power is flowed to the DC output side Vc1 of AC/DC conversion module by the second storage bodies, and system is operated in inverter mode；Otherwise,
As iL2, to the integrated value of time, < 0, then power is charged to the first storage bodies by the DC output side Vc1 of AC/DC conversion module, is
System is operated in rectification state.
The control system of a kind of split-phase type low-power consumption energy accumulation current converter, based on split-phase type low-power consumption energy storage disclosed by the invention
Current transformer, control system includes separate AC/DC conversion module control system and DC/DC conversion module control system, and the two is adopted
Realize protecting the linkage between threshold value, first, the control command conversion that outside is inputted by control system by the mode that information is mutual
For watt current reference value Id_Ref and reactive current reference value Iq_Ref, watt current reference value Id_Ref and reactive current ginseng
Examine value Iq_Ref can also directly input, then:
AC/DC conversion module control system:
Described three-phase alternating current is phase three-wire three when powering: control system Real-time Collection Vab and Vbc, electric current ia and electric current ic
Actual information, Vab is the voltage instantaneous value between A phase and B phase, and Vbc is the voltage instantaneous value between B phase and C phase, electric current ia
For the electric current instantaneous value of A phase, electric current ib is the electric current instantaneous value of B phase；By Vab and Vbc by phase-locked loop module obtain phase place and
Amplitude information, including: the information of sin_cos, ω and Um, these information is used as to use when Tabc/dq converts；By electric current ia and electricity
Stream ic does Tabc/dq conversion, obtains actually detected feedback current: watt current id and reactive current iq；By active power id
Error is obtained after comparing with watt current reference value Id_Ref and reactive current reference value Iq_Ref with reactive current iq；Will
Error carries out decoupling computation respectively through two PI modules；Decoupling result obtains controlling life after Tabc/dq inverse transform block
Order, and after on-off control order generation module, ingoing power switch drive module；Control is ordered by power switch drive module
Order output is to AC/DC conversion module；Two PI modules herein are important, serve the central role of control system, and these are two years old
Integral coefficient and the proportionality coefficient of individual PI module can be arranged flexibly.
Described three-phase alternating current is three-phase and four-line when powering: only have when control system Real-time Collection voltage, electric current instantaneous value
Institute is different, when three-phase and four-line is powered, and control system Real-time Collection phase voltage vaN, vbN, vcN and phase current iaN, ibN, icN,
It is all identical with three-phase three-wire system with the process of control that other control logic；
DC/DC conversion module control system, is divided into three steps:
The first step, mode of operation select: as not having storage bodies fault, then select mode of operation one；Such as the first storage bodies event
Barrier, then select mode of operation three；Such as the second storage bodies fault, then select mode of operation two；Such as the first storage bodies and the second energy storage
Body all reports fault, then system-down；In specific embodiment: if storage bodies is battery, it is possible to use battery management system
The signal that system is given judges whether storage bodies is in malfunction；If it is for the storage bodies not having battery management system, permissible
Judged by the voltage and current of storage bodies, concrete judgment mode use threshold ratio compared with mode.The most no matter for which kind of
Storage bodies, all can corresponding characteristic curve, if the electric current that monitoring is returned in real time and voltage curve deviation storage bodies characteristic curve, just
Judge storage bodies fault, fault-signal is exported and selects module to mode of operation, the foundation selected as mode of operation.
Second step, on off state select: using the storage bodies voltage that detects in real time as basis for estimation, as in mode of operation one
Kind, storage bodies voltage is vdc1+vdc2；If selecting mode of operation two, storage bodies voltage is vdc1；If selection mode of operation
Three, storage bodies voltage is vdc2；If storage bodies voltage is higher than the receptible minimum direct current magnitude of voltage Vc1_Ref.min of system,
In mode of operation one, then select the first on off state；The 3rd on off state is selected in mode of operation two；In mode of operation three
Middle selection the 5th on off state；
3rd step, dutycycle calculate；
Finally on off state is selected and the result of dutycycle calculating is transmitted to control command generation module, and then output is given
Power switch drive module.
Beneficial effects of the present invention
The present invention is directed to phase three-wire three or three-phase and four-line exchange proposes a kind of split-phase type low-power consumption energy accumulation current converter, its DC/
DC conversion section uses the topological structure that can realize battery modules redundancy and series connection that can create, and the system that reduces is to direct current
The restriction of voltage pulsation, and the fault redundance of dc-battery can be achieved, when one of them dc-battery breaks down,
Integrated circuit still can utilize an other dc-battery to work, and improves the stability of current transformer.And DC/DC converts mould
The power switch of block, without need not full-time in high frequency state, the efficiency of the bigger system that improves, reduces power attenuation.
It is simultaneously based on this structure and proposes the control strategy of innovation, can the efficiency of bigger raising system.
Accompanying drawing explanation
Fig. 1 is three-phase and four-line star circuit diagram of twin-stage three-phase energy accumulation current converter when connecing.
Fig. 2 is three-phase and four-line star control system figure of twin-stage three-phase energy accumulation current converter when connecing.
Fig. 3 is three-phase and four-line star AC/DC conversion module control system figure of twin-stage three-phase energy accumulation current converter when connecing.
Fig. 4 is three-phase and four-line star DC/DC conversion module control system figure of twin-stage three-phase energy accumulation current converter when connecing.
The circuit diagram of twin-stage three-phase energy accumulation current converter when Fig. 5 is phase three-wire three corner connection.
The control system figure of twin-stage three-phase energy accumulation current converter when Fig. 6 is phase three-wire three corner connection.
The AC/DC conversion module control system figure of twin-stage three-phase energy accumulation current converter when Fig. 7 is phase three-wire three corner connection.
The DC/DC conversion module control system figure of twin-stage three-phase energy accumulation current converter when Fig. 8 is phase three-wire three corner connection.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but protection scope of the present invention is not limited to this:
Embodiment 1: combine Fig. 1 and Fig. 5, a kind of split-phase type low-power consumption energy accumulation current converter, it include AC/DC conversion module,
DC/DC conversion module and storage bodies, three-phase alternating current connects the input of AC/DC conversion module, the outfan of AC/DC conversion module
Connecting the input of DC/DC conversion module, the outfan of DC/DC conversion module connects storage bodies, and storage bodies includes the of concatenation
One storage bodies 111 and the second storage bodies 112, the negative pole end of the first storage bodies 111 connects the positive terminal of the second storage bodies 112, its
In:
AC/DC conversion module includes that three-phase bridge rectifier circuit, described three-phase bridge rectifier circuit include that the first power is opened
Close pipe the 101, second power switch pipe the 102, the 3rd power switch pipe the 103, the 4th power switch pipe the 104, the 9th power switch pipe
114, the tenth power switch pipe the 115, the 11st power switch pipe the 116, the 12nd power switch pipe the 117, the 13rd power switch
Pipe the 119, the 14th power switch pipe the 120, the 15th power switch pipe the 121 and the 16th power switch pipe 122；Described AC/DC
The circuit structure of conversion module is:
Described three-phase alternating current is four line stars when connecing: combines Fig. 1, A phase with N line as exchanging input, and opens with the first power
Close pipe the 101, second power switch pipe the 102, the 3rd power switch pipe the 103, the 4th power switch pipe 104 and form bridge rectifier electricity
Road, its DC output side connects the input of DC/DC conversion module；B phase, and is opened with the 9th power as exchanging input with N line
Close pipe the 114, the tenth power switch pipe the 115, the 11st power switch pipe the 116, the 12nd power switch pipe 117 and form bridge rectifier
Circuit, its DC output side connects the input of DC/DC conversion module；C phase with N line as exchanging input, and with the 13rd merit
Rate switching tube the 119, the 14th power switch pipe the 120, the 15th power switch pipe the 121, the 16th power switch pipe 122 forms bridge
Formula rectification circuit, its DC output side connects the input of DC/DC conversion module；
Or,
Described three-phase alternating current is three line angles when connecing: combines Fig. 5, A phase with B phase as exchanging input, and opens with the first power
Close pipe the 101, second power switch pipe the 102, the 3rd power switch pipe the 103, the 4th power switch pipe 104 and form bridge rectifier electricity
Road, its DC output side connects the input of DC/DC conversion module；B phase exchanges input with the conduct of C phase, and opens with the 9th power
Close pipe the 114, the tenth power switch pipe the 115, the 11st power switch pipe the 116, the 12nd power switch pipe 117 and form bridge rectifier
Circuit, its DC output side connects the input of DC/DC conversion module；C phase and A phase as exchanging input, and with the 13rd merit
Rate switching tube the 119, the 14th power switch pipe the 120, the 15th power switch pipe the 121, the 16th power switch pipe 122 forms bridge
Formula rectification circuit, its DC output side connects the input of DC/DC conversion module；
DC/DC conversion module includes the 5th power switch pipe the 105, the 6th power switch pipe the 106, the 7th power switch pipe
107, the 8th power switch pipe 108, the positive voltage output end of AC/DC conversion module connect respectively the 5th power switch pipe 105,
One end of six power switch pipes 106；The other end of the 5th power switch pipe 105: on the one hand connect by the 7th power switch pipe 107
Return the low-voltage output end of AC/DC conversion module, on the other hand connect the positive terminal of the first storage bodies 111；6th power switch
The other end of pipe 106: on the one hand taken back the low-voltage output end of AC/DC conversion module by the 8th power switch pipe 108, another
Aspect is connected between the first storage bodies 111 and the second storage bodies 112；The negative pole end of the second storage bodies 112 takes back AC/DC and converts mould
The low-voltage output end of block.
Preferably, described storage bodies is dc-battery.
Embodiment 2: a kind of split-phase type low-power consumption energy accumulation current converter, described AC/DC conversion module is also
Including the first filter capacitor 113, described first filter capacitor 113 is connected to the DC output side Vc1 two ends of AC/DC conversion module,
For stabilizing DC voltage.
Embodiment 3: a kind of split-phase type low-power consumption energy accumulation current converter, described DC/DC conversion module is also
Including the first filter inductance 109 and the second filter inductance 110, the positive terminal of described first storage bodies 111 passes through the first filtered electrical
Sense 109 connects the 5th power switch pipe 105 and the 7th power switch pipe 107 respectively, and the negative pole end of described second storage bodies 112 leads to
Cross the second filter inductance 110 and take back the low-voltage output end of AC/DC conversion module；First filter inductance 109 and the second filtered electrical
Sense 110 is used for smoothing current waveform, limits the sudden change of electric current.
Embodiment 4: as described in Example 1 a kind of split-phase type low-power consumption energy accumulation current converter, power switch pipe be IGBT or
Person MOSFET, it is also possible to be other power switch pipes realizing switching function.
Embodiment 5: combining Fig. 2 and Fig. 6, the control system of a kind of split-phase type low-power consumption energy accumulation current converter, based on the present invention
Disclosed split-phase type low-power consumption energy accumulation current converter, control system includes that separate AC/DC conversion module control system and DC/DC become
Changing module control system, the mutual mode of the two employing information realizes protecting the linkage between threshold value, and first, control system will outward
The control command (for reference, conversion method is prior art for meritorious reference and nothing) of portion's input is converted to watt current reference value
Id_Ref and reactive current reference value Iq_Ref, watt current reference value Id_Ref and reactive current reference value Iq_Ref can also
Directly input, then:
AC/DC conversion module control system:
Described three-phase alternating current is phase three-wire three when powering: combine Fig. 6-7, control system Real-time Collection Vab and Vbc, electric current
Ia and the actual information of electric current ic, Vab is the voltage instantaneous value between A phase and B phase, and Vbc is that the voltage between B phase and C phase is real
Duration, electric current ia is the electric current instantaneous value of A phase, and electric current ib is the electric current instantaneous value of B phase；Vab and Vbc is passed through phaselocked loop
(PLL) module obtains phase and amplitude information, including: the information of sin_cos, ω and Um, these information is used as Tabc/dq and converts
Time use (Tabcc/dq conversion and be inversely transformed into prior art, here is omitted)；Electric current ia and electric current ic is Tabc/dq
Conversion, obtains actually detected feedback current: watt current id and reactive current iq；By active power id and reactive current iq with
Watt current reference value Id_Ref and reactive current reference value Iq_Ref obtain error after comparing；By error respectively through two
Individual PI module carries out decoupling computation；Decoupling result obtains control command after Tabc/dq inverse transform block, and through switch control
After order generation module processed, ingoing power switch drive module；Control command is exported AC/DC and becomes by power switch drive module
Die change block；Two PI modules herein are important, serve the central role of control system, the integration system of the two PI module
Number and proportionality coefficient can be arranged flexibly.
Described three-phase alternating current is three-phase and four-line when powering: combine Fig. 2-3, only at control system Real-time Collection voltage, electric current
During instantaneous value different, when three-phase and four-line is powered, control system Real-time Collection phase voltage vaN, vbN, vcN and phase current
IaN, ibN, icN, it is all identical with three-phase three-wire system with the process of control that other control logic；
DC/DC conversion module control system, in conjunction with Fig. 4 and Fig. 8, is divided into three steps:
The first step, mode of operation select: as not having storage bodies fault, then select mode of operation one；Such as the first storage bodies 111
Fault, then select mode of operation three；Such as the second storage bodies 112 fault, then select mode of operation two；Such as the first storage bodies 111 He
Second storage bodies 112 all reports fault, then system-down；In specific embodiment: if storage bodies is battery, it is possible to use
The signal that battery management system BMS is given judges whether storage bodies is in malfunction；If for there is no battery management system
Storage bodies, can be judged by the voltage and current of storage bodies, concrete judgment mode use threshold ratio compared with mode.I.e.
No matter for which kind of storage bodies, all can corresponding characteristic curve, if the electric current that monitoring is returned in real time and voltage curve deviation energy storage
Bulk properties curve, is judged as storage bodies fault, is exported by fault-signal and selects module to mode of operation, selects as mode of operation
Foundation.
Second step, on off state select: using the storage bodies voltage that detects in real time as basis for estimation, as in mode of operation one
Kind, storage bodies voltage is vdc1+vdc2；If selecting mode of operation two, storage bodies voltage is vdc1；If selection mode of operation
Three, storage bodies voltage is vdc2；If storage bodies voltage is higher than the receptible minimum direct current magnitude of voltage Vc1_Ref.min of system,
In mode of operation one, then select the first on off state；The 3rd on off state is selected in mode of operation two；In mode of operation three
Middle selection the 5th on off state；
3rd step, dutycycle calculate；
Finally on off state is selected and the result of dutycycle calculating is transmitted to control command generation module, and then output is given
Power switch drive module.
Embodiment 6: the control method of a kind of split-phase type low-power consumption energy accumulation current converter is low based on split-phase type disclosed by the invention
Power consumption energy accumulation current converter, it includes three kinds of mode of operations:
In mode of operation one, the 6th power switch pipe 106 and the 8th power switch pipe 108 are in normal off open state, the
Five power switch pipes 105 and the 7th power switch pipe 107 are in alternating conductive state, the first storage bodies 111 and the second storage bodies
112 in series connection, and the two participates in power change jointly；Therefore global voltage will be higher than single one storage bodies participation work
Time voltage.The control of circuit is the most flexible, and the function that can realize is abundanter, reduces overall circuit function to list
The dependence of one storage bodies voltage pulsation, can single energy storage carry voltage relatively low when realize reactive-load compensation, harmonics restraint and
Normal power conversion, it is not necessary to the transformator of AC.
In mode of operation two, the 6th power switch pipe 106 is in normal off open state, and the 8th power switch pipe 108 is in
Normally on, the 5th power switch pipe 105 and the 7th power switch pipe 107 be in alternating conductive state, the only first storage bodies
111 participate in electric energy conversion；Therefore when the second storage bodies 112 breaks down or voltage reduces to 0, it is possible to incision mode of operation
In two, utilize the first storage bodies 111 to participate in energy conversion, do not interfere with circuit work.In mode of operation two, the second storage bodies
112 define path, due to second in this on off state by the second filter inductance 110 and the 8th power switch pipe 108
Storage bodies 112 is not involved in work, and to judge the dump energy of the second storage bodies 112 relatively before cutting this on off state
Low, voltage is relatively low, in the case of open circuit or artificial excision the second storage bodies 112, could enter this mode of operation.So this
Branch road seems Guan Bi, but electric current or electric current be not less, can ignore.
In mode of operation three, the 5th power switch pipe 105 and the 7th power switch pipe 107 are in normal off open state, the
Six power switch pipes 106 and the 7th power switch pipe 107 are in alternating conductive state, and the only second storage bodies 112 participates in electric energy and turns
Change.Owing to the first storage bodies 111 in this on off state is not involved in work, and to judge before cutting this on off state
The dump energy of the first storage bodies 111 is too low, voltage is relatively low, in the case of open circuit or artificial excision the first storage bodies 111,
This on off state can be entered.So this branch road seems Guan Bi, but electric current or electric current be not less, it is possible to ignores.
Embodiment 7, the control method of a kind of split-phase type low-power consumption energy accumulation current converter as described in Example 6, mode of operation
One includes two on off states:
First on off state: the 5th power switch pipe 105 turns on, the 7th power switch pipe 107 disconnects, the 6th power switch
Pipe 106 and the 8th power switch pipe 108 owing to bearing backward voltage and in cut-off state, power flow direction by the first storage bodies 111,
Second storage bodies the 112, first filter inductance the 109, second filter inductance 110 flows to the DC output side of AC/DC conversion module
Vc1；The electric current iL1 of the first filter inductance 109 and electric current iL2 of the second filter inductance 110 is identical, the most on a declining curve, numerical value
Meet:Output voltage Vc1=Vdc1+Vdc2；Wherein: Vdc1 is the first storage bodies 111
Voltage, Vdc2 is the voltage of the second storage bodies 112；
Second switch state: the 5th power switch pipe 105 disconnects, the 7th power switch pipe 107 turns on, the 5th power switch
Pipe 105 and the 8th power switch pipe 108 owing to bearing backward voltage and in cut-off state, power flow direction by the first storage bodies 111,
First filter inductance the 109, second filter inductance 110 is charged by the second storage bodies 112；The electric current of the first filter inductance 109
The electric current iL2 of iL1 and the second filter inductance 110 is identical, the most in rising trend, and numerical value meets:
Embodiment 8: the control method of a kind of split-phase type low-power consumption energy accumulation current converter as described in Example 7, defines direct current
The control Target Min of outlet side voltage Vc1 is Vc1_Ref.min, and the first on off state and second switch state are according to direct current
Outlet side voltage Vc1 and select:
As Vdc1+Vdc2 > Vc1_Ref.min time, use single-stage control strategy mode, select the first on off state, this
Sample it is avoided that the frequent movement of power switch pipe, the bigger switching loss reducing power switch pipe, improve system
Efficiency；
As Vdc1+Vdc2=Vc1_Ref.min, circuit is switched to buck-boost work, the 5th power switch pipe 105
With the 7th power switch pipe 107 in alternate conduction, the first on off state and second switch state are alternately present.Now, the first filter
The electric current iL1 of ripple the inductance 109 and electric current iL2 of the second filter inductance 110 does not haves interrupted situation, wavy in triangle all the time
State, in definition mode of operation one, the switch periods of the 5th power switch pipe 105 is T1, the dutycycle of the 5th power switch pipe 105
For D1, the situation of total following three kinds of electric currents occurs:
1), as iL1=iL2 > 0 time, Vc1=(Vdc1+Vdc2)/(1-D1)；
2), when iL1=iL2 < when 0, Vc1=(Vdc1+Vdc2)/D1；
3), work as iL1=iL2, and when 0 value occurs alternatively up and down, energy Flow depends on that iL1=iL2 is to the time
Integration.If integrated value > 0, then power is flowed to the direct current of AC/DC conversion module by the first storage bodies 111 and the second storage bodies 112
Outlet side Vc1, Vc1 are in rising trend；Otherwise, as iL1=iL2, to the integrated value of time, < 0, then power is by AC/DC conversion module
DC output side Vc1 charge to the first storage bodies 111 and the second storage bodies 112, the overall power of system is by exchanging lateral the
One storage bodies 111 and the second storage bodies 112 charge, and this system is operated in rectification state.
Embodiment 9: the control method of a kind of split-phase type low-power consumption energy accumulation current converter as described in Example 6, mode of operation
Two include two on off states:
3rd on off state: the 5th power switch pipe 105 turns on, the 7th power switch pipe 107 disconnects, the 6th power switch
Pipe 106 and the 7th power switch pipe 107 are owing to bearing backward voltage and in cut-off state, and power flow direction is by the first storage bodies 111
Flow to the DC output side Vc1 of AC/DC conversion module；The electric current iL1 of the first filter inductance 109 is on a declining curve, and numerical value meets:Wherein: Vdc1 is the voltage of the first storage bodies 111；
4th on off state: the 5th power switch pipe 105 disconnects, the 7th power switch pipe 107 turns on, the first storage bodies
111 form a current path by power switch pipe 107 and the 8th power switch pipe 108, and the first storage bodies 111 is to the first filter
Ripple inductance 109 charges；The electric current iL1 of the first filter inductance 109 is in rising trend, and numerical value meets:
In mode of operation two, the 3rd on off state and the 4th on off state are alternately present.The electricity of the first filter inductance 109
Stream iL1 do not have interrupted situation, all the time in triangular wave state, second filter inductance 110 connect the second storage bodies 112 or
Due to malfunction, exiting circuit work, therefore iL2 is approximately 0, the 5th power switch pipe 105 in definition mode of operation two
Switch periods is T2, and the dutycycle of the 5th power switch pipe 105 is D2, and the situation of total following three kinds of electric currents occurs:
1), as iL1 > 0 time, Vc1=Vdc1/ (1-D2)；
2), when iL1 < when 0, Vc1=Vdc1/D2；
3), when iL1 occurs alternatively up and down in 0 value, energy Flow depends on the iL1 integration to the time.If integrated value >
0, then power is flowed to the DC output side Vc1 of AC/DC conversion module by the first storage bodies 111, and system is operated in inverter mode；Instead
It, when iL1 to the integrated value of time < 0, then power by the DC output side Vc1 of AC/DC conversion module to the first storage bodies 111
Charging, system is operated in rectification state.
Embodiment 10: the control method of a kind of split-phase type low-power consumption energy accumulation current converter as described in Example 6, mode of operation
Three include two on off states:
5th on off state: the 6th power switch pipe 106 turns on, the 8th power switch pipe 108 disconnects, and power flow direction is by
Two storage bodies 112 and the second filter inductance 110 flow to the DC output side Vc1 of AC/DC conversion module；Second filter inductance 110
Electric current iL2 on a declining curve, numerical value meet:
6th on off state: the 6th power switch pipe 106 disconnects, the 8th power switch pipe 108 turns on, the second storage bodies
112 pairs of the second filter inductances 110 are charged, and the electric current iL2 of the second filter inductance 110 is in rising trend, and numerical value meets
In mode of operation three, the 5th on off state and the 6th on off state are alternately present.The electricity of the second filter inductance 110
Stream iL2 do not have interrupted situation, all the time in triangular wave state, first filter inductance 109 connect the first storage bodies 111 or
Due to malfunction, exiting circuit work, therefore iL1 is approximately 0, the 6th power switch pipe 1056 in definition mode of operation three
Switch periods is T3, and the dutycycle of the 6th power switch pipe 106 is D3, and the situation of total following three kinds of electric currents occurs:
1), as iL2 > 0 time, Vc1=Vdc2/ (1-D3)；
2), when iL2 < when 0, Vc1=Vdc2/D3；
3), when iL2 occurs alternatively up and down in 0 value, energy Flow depends on the iL2 integration to the time.If integrated value >
0, then power is flowed to the DC output side Vc1 of AC/DC conversion module by the second storage bodies 112, and system is operated in inverter mode；Instead
It, when iL2 to the integrated value of time < 0, then power by the DC output side Vc1 of AC/DC conversion module to the first storage bodies 111
Charging, system is operated in rectification state.
Specific embodiment described herein is only to illustrate spirit of the present invention.Technology neck belonging to the present invention
Described specific embodiment can be made various amendment or supplements or use similar mode to replace by the technical staff in territory
Generation, but without departing from the spirit of the present invention or surmount scope defined in appended claims.
Claims (10)
1. a split-phase type low-power consumption energy accumulation current converter, it is characterised in that it includes AC/DC conversion module, DC/DC conversion module
And storage bodies, three-phase alternating current connects the input of AC/DC conversion module, and the outfan of AC/DC conversion module connects DC/DC conversion
The input of module, the outfan of DC/DC conversion module connects storage bodies, and storage bodies includes first storage bodies (111) of concatenation
With the second storage bodies (112), the negative pole end of the first storage bodies (111) connects the positive terminal of the second storage bodies (112), wherein:
AC/DC conversion module includes that three-phase bridge rectifier circuit, described three-phase bridge rectifier circuit include the first power switch pipe
(101), the second power switch pipe (102), the 3rd power switch pipe (103), the 4th power switch pipe (104), the 9th power are opened
Close pipe (114), the tenth power switch pipe (115), the 11st power switch pipe (116), the 12nd power switch pipe (117), the
13 power switch pipes (119), the 14th power switch pipe (120), the 15th power switch pipe (121) and the 16th power are opened
Close pipe (122)；The circuit structure of described AC/DC conversion module is:
A phase with N line as exchanging input, and with the first power switch pipe (101), the second power switch pipe (102), the 3rd power
Switching tube (103), the 4th power switch pipe (104) composition bridge rectifier, its DC output side connects DC/DC conversion module
Input；B phase with N line as exchanging input, and with the 9th power switch pipe (114), the tenth power switch pipe (115),
11 power switch pipes (116), the 12nd power switch pipe (117) composition bridge rectifier, its DC output side connects DC/
The input of DC conversion module；C phase with N line as exchanging input, and with the 13rd power switch pipe (119), the 14th power
Switching tube (120), the 15th power switch pipe (121), the 16th power switch pipe (122) composition bridge rectifier, it is straight
Stream outlet side connects the input of DC/DC conversion module；
Or,
A phase and B phase as exchanging input, and with the first power switch pipe (101), the second power switch pipe (102), the 3rd power
Switching tube (103), the 4th power switch pipe (104) composition bridge rectifier, its DC output side connects DC/DC conversion module
Input；B phase and C phase as exchanging input, and with the 9th power switch pipe (114), the tenth power switch pipe (115), the
11 power switch pipes (116), the 12nd power switch pipe (117) composition bridge rectifier, its DC output side connects DC/
The input of DC conversion module；C phase and A phase as exchanging input, and with the 13rd power switch pipe (119), the 14th power
Switching tube (120), the 15th power switch pipe (121), the 16th power switch pipe (122) composition bridge rectifier, it is straight
Stream outlet side connects the input of DC/DC conversion module；
DC/DC conversion module includes the 5th power switch pipe (105), the 6th power switch pipe (106), the 7th power switch pipe
(107), the 8th power switch pipe (108), the positive voltage output end of AC/DC conversion module connects the 5th power switch pipe respectively
(105), one end of the 6th power switch pipe (106)；The other end of the 5th power switch pipe (105): on the one hand by the 7th merit
Rate switching tube (107) takes back the low-voltage output end of AC/DC conversion module, is on the other hand just connecting the first storage bodies (111)
Extremely；The other end of the 6th power switch pipe (106): on the one hand take back AC/DC by the 8th power switch pipe (108) and convert mould
The low-voltage output end of block, is on the other hand connected between the first storage bodies (111) and the second storage bodies (112)；Second storage bodies
(112) negative pole end takes back the low-voltage output end of AC/DC conversion module.
A kind of split-phase type low-power consumption energy accumulation current converter the most according to claim 1, it is characterised in that described AC/DC converts mould
Block also includes that the first filter capacitor (113), described first filter capacitor (113) are connected to the DC output side of AC/DC conversion module
Vc1 two ends, are used for stabilizing DC voltage.
A kind of split-phase type low-power consumption energy accumulation current converter the most according to claim 1, it is characterised in that described DC/DC converts mould
Block also includes that the first filter inductance (109) and the second filter inductance (110), the positive terminal of described first storage bodies (111) pass through
First filter inductance (109) connects the 5th power switch pipe (105) and the 7th power switch pipe (107), described second storage respectively
The negative pole end of energy body (112) takes back the low-voltage output end of AC/DC conversion module by the second filter inductance (110)；First filter
Ripple inductance (109) and the second filter inductance (110) are used for smoothing current waveform, limit the sudden change of electric current.
A kind of split-phase type low-power consumption energy accumulation current converter the most according to claim 1, it is characterised in that power switch pipe is
IGBT or MOSFET, it is also possible to be other power switch pipes realizing switching function.
5. the control method of a split-phase type low-power consumption energy accumulation current converter, it is characterised in that it includes three kinds of mode of operations:
In mode of operation one, the 6th power switch pipe (106) and the 8th power switch pipe (108) are in normal off open state, the
Five power switch pipes (105) and the 7th power switch pipe (107) are in alternating conductive state, the first storage bodies (111) and second
Storage bodies (112) is in series connection, and the two participates in power change jointly；
In mode of operation two, the 6th power switch pipe (106) is in normal off open state, and the 8th power switch pipe (108) is in
Normally on, the 5th power switch pipe (105) and the 7th power switch pipe (107) be in alternating conductive state, the only first storage
Electric energy conversion can be participated in by body (111)；
In mode of operation three, the 5th power switch pipe (105) and the 7th power switch pipe (107) are in normal off open state, the
Six power switch pipes (106) and the 7th power switch pipe (107) are in alternating conductive state, and the only second storage bodies (112) participates in
Electric energy is changed.
The control method of a kind of split-phase type low-power consumption energy accumulation current converter the most according to claim 5, it is characterised in that work
Pattern one includes two on off states:
First on off state: the 5th power switch pipe (105) conducting, the 7th power switch pipe (107) disconnects, the 6th power switch
Pipe (106) and the 8th power switch pipe (108) are owing to bearing backward voltage and in cut-off state, power flow direction is by the first storage bodies
(111), the second storage bodies (112), the first filter inductance (109), the second filter inductance (110) flow to AC/DC conversion module
DC output side Vc1；The electric current iL1 of the first filter inductance (109) and the electric current iL2 of the second filter inductance (110) is identical, all in
Downward trend, numerical value meets:Output voltage Vc1=Vdc1+Vdc2；Wherein: Vdc1 is
The voltage of one storage bodies (111), Vdc2 is the voltage of the second storage bodies (112)；
Second switch state: the 5th power switch pipe (105) disconnects, the 7th power switch pipe (107) conducting, the 5th power switch
Pipe (105) and the 8th power switch pipe (108) are owing to bearing backward voltage and in cut-off state, power flow direction is by the first storage bodies
(111), the first filter inductance (109), the second filter inductance (110) are charged by the second storage bodies (112)；First filtered electrical
The electric current iL1 of sense (109) and the electric current iL2 of the second filter inductance (110) is identical, the most in rising trend, and numerical value meets:
The control method of a kind of split-phase type low-power consumption energy accumulation current converter the most according to claim 6, it is characterised in that definition
The control Target Min of DC output side voltage Vc1 is Vc1_Ref.min, the first on off state and second switch state according to
DC output side voltage Vc1 and select:
As Vdc1+Vdc2 > Vc1_Ref.min time, select the first on off state；
As Vdc1+Vdc2=Vc1_Ref.min, the 5th power switch pipe (105) and the 7th power switch pipe (107) are in alternately
Conducting, the first on off state and second switch state are alternately present.
The control method of a kind of split-phase type low-power consumption energy accumulation current converter the most according to claim 5, it is characterised in that work
Pattern two includes two on off states:
3rd on off state: the 5th power switch pipe (105) conducting, the 7th power switch pipe (107) disconnects, the 6th power switch
Pipe (106) and the 7th power switch pipe (107) are owing to bearing backward voltage and in cut-off state, power flow direction is by the first storage bodies
(111) the DC output side Vc1 of AC/DC conversion module is flowed to；The electric current iL1 of the first filter inductance (109) is on a declining curve, number
Value meets:Wherein: Vdc1 is the voltage of the first storage bodies (111)；
4th on off state: the 5th power switch pipe (105) disconnects, the 7th power switch pipe (107) conducting, the first storage bodies
(111) current path, the first storage bodies (111) are formed by power switch pipe (107) and the 8th power switch pipe (108)
Charge to the first filter inductance (109)；The electric current iL1 of the first filter inductance (109) is in rising trend, and numerical value meets:
In mode of operation two, the 3rd on off state and the 4th on off state are alternately present.
The control method of a kind of split-phase type low-power consumption energy accumulation current converter the most according to claim 5, it is characterised in that work
Pattern three includes two on off states:
5th on off state: the 6th power switch pipe (106) conducting, the 8th power switch pipe (108) disconnects, and power flow direction is by the
Two storage bodies (112) and the second filter inductance (110) flow to the DC output side Vc1 of AC/DC conversion module；Second filter inductance
(110) electric current iL2 is on a declining curve, and numerical value meets:
6th on off state: the 6th power switch pipe (106) disconnects, the 8th power switch pipe (108) conducting, the second storage bodies
(112) being charged the second filter inductance (110), the electric current iL2 of the second filter inductance (110) is in rising trend, and numerical value is full
Foot
In mode of operation three, the 5th on off state and the 6th on off state are alternately present.
10. the control system of a split-phase type low-power consumption energy accumulation current converter, it is characterised in that control system includes separate AC/DC
Conversion module control system and DC/DC conversion module control system, the mutual mode of the two employing information realize protecting threshold value it
Between linkage, first, the control command that outside inputs is converted to watt current reference value Id_Ref and idle electricity by control system
Stream reference value Iq_Ref, then:
AC/DC conversion module control system:
Described three-phase alternating current is phase three-wire three when powering: control system Real-time Collection Vab and Vbc, electric current ia and the reality of electric current ic
Border information, Vab is the voltage instantaneous value between A phase and B phase, and Vbc is the voltage instantaneous value between B phase and C phase, and electric current ia is A
The electric current instantaneous value of phase, electric current ib is the electric current instantaneous value of B phase；Vab and Vbc is obtained phase and amplitude by phase-locked loop module
Information, including: the information of sin_cos, ω and Um, these information is used as to use when Tabc/dq converts；By electric current ia and electric current ic
Do Tabc/dq conversion, obtain actually detected feedback current: watt current id and reactive current iq；By active power id and nothing
Merit electric current iq obtains error after comparing with watt current reference value Id_Ref and reactive current reference value Iq_Ref；By error
Decoupling computation is carried out respectively through two PI modules；Decoupling result obtains control command after Tabc/dq inverse transform block, and
After on-off control order generation module, ingoing power switch drive module；Power switch drive module is defeated by control command
Go out to AC/DC conversion module；
Described three-phase alternating current is three-phase and four-line when powering: only when control system Real-time Collection voltage, electric current instantaneous value the most not
With, when three-phase and four-line is powered, control system Real-time Collection phase voltage vaN, vbN, vcN and phase current iaN, ibN, icN, other
Control logic all identical with three-phase three-wire system with the process of control；
DC/DC conversion module control system, is divided into three steps:
The first step, mode of operation select: as not having storage bodies fault, then select mode of operation one；Such as the first storage bodies (111) event
Barrier, then select mode of operation three；Such as the second storage bodies (112) fault, then select mode of operation two；Such as the first storage bodies (111)
Fault, then system-down is all reported with the second storage bodies (112)；
Second step, on off state select: if storage bodies voltage is higher than the receptible minimum direct current magnitude of voltage Vc1_ of system
Ref.min, then select the first on off state in mode of operation one；The 3rd on off state is selected in mode of operation two；In work
Operation mode three selects the 5th on off state；
3rd step, dutycycle calculate；
Finally on off state is selected and the result of dutycycle calculating is transmitted to control command generation module, and then output is to power
Switch drive module.
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