CN106787907A - Light stores up current transformer and light stores up the control method of current transformer - Google Patents
Light stores up current transformer and light stores up the control method of current transformer Download PDFInfo
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- CN106787907A CN106787907A CN201611261258.2A CN201611261258A CN106787907A CN 106787907 A CN106787907 A CN 106787907A CN 201611261258 A CN201611261258 A CN 201611261258A CN 106787907 A CN106787907 A CN 106787907A
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- 238000004146 energy storage Methods 0.000 claims description 19
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- 230000005611 electricity Effects 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 8
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- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- H02J3/383—
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of light storage current transformer and control method, for field of power, device is more in can solve the problem that DC/AC two-way circuits, and the volume of DC/AC two-way circuit equipment is relatively large, the problem also very high, relatively costly of the requirement to radiating.Light stores up current transformer, including DC/AC modules, and DC/AC modules include：Three-phase inverting circuit and filter circuit, wherein, three-phase inverting circuit includes three bridge arms of parallel connection, three bridge arms of parallel connection include two respectively by bridge arm and a bridge arm being made up of two identical capacitances in series that two insulated gate bipolar transistor IGBTs are in series, wherein, there is fly-wheel diode by each the IGBT reverse parallel connection in bridge arm two IGBT in series, the midpoint of each bridge arm in three bridge arms of parallel connection is connected to the three-phase alternating current terminals of power network by three corresponding filter circuits respectively.
Description
Technical field
The control method of current transformer is stored up the present invention relates to field of power, more particularly to a kind of light storage current transformer and light.
Background technology
With expanding economy, solar energy power generating industry is also developed rapidly, and market constantly expands using scale, rear
The developing effect of the continuous energy is also more and more important.Photovoltaic generation would generally increase energy storage dress on the basis of photovoltaic generation
Put, so as to constitute photovoltaic inversion energy-storage system, i.e., light stores up current transformer.When the energy supply of photovoltaic inversion energy-storage system is more than loading demand
When, unnecessary electrical power storage is got up, when the energy supply of photovoltaic inversion energy-storage system is less than loading demand, the electric energy release that will be stored
Out, so as to ensure the powering load that photovoltaic inversion energy-storage system can be steadily lasting.
The core of photovoltaic energy storage system is energy accumulation current converter, and energy accumulation current converter has diversified forms, and two-stage type bidirectional energy-storage becomes
The application for flowing device is more.Two-stage type bidirectional energy-storage current transformer exchanges AC two-way circuits two with DC/ by direct current DC/DC two-way circuits
It is grouped into, DC/DC two-way circuits and DC/AC two-way circuits are in parallel, DC/DC two-way circuits connection energy-storage battery or cell panel, DC/
AC two-way circuits are connected with power network.Traditional DC/AC two-way circuits are mainly three-phase half-bridge structure, and three-phase half-bridge includes six
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), wherein each two insulated gate are double
Bipolar transistor is connected, and the IGBT for then connecting mutually is in parallel again, one fly-wheel diode of each IGBT inverse parallel.Due to adopting
With six IGBT and fly-wheel diode is included in the DC/AC two-way circuits of the structure type, device is more, so DC/AC is double
Volume to circuit arrangement is relatively large, and the requirement of IGBT and fly-wheel diode to radiating is also very high, relatively costly.
The content of the invention
A kind of light storage current transformer and control method are the embodiment of the invention provides, device in DC/AC two-way circuits is can solve the problem that
Part is more, and the volume of DC/AC two-way circuit equipment is relatively large, the problem also very high, relatively costly of the requirement to radiating.
In a first aspect, the invention provides a kind of light storage current transformer, including DC/AC modules, the DC/AC modules include：Three
Phase inverter circuit and filter circuit, wherein,
Three-phase inverting circuit includes three bridge arms of parallel connection, and three bridge arms of parallel connection include two respectively by two insulated gates
Bipolar transistor IGBT bridge arm in series and a bridge arm being made up of two identical capacitances in series, wherein, by two
Each IGBT reverse parallel connection in bridge arm individual IGBT in series has fly-wheel diode, each bridge in three bridge arms of parallel connection
The midpoint of arm is connected to the three-phase alternating current terminals of power network by three corresponding filter circuits respectively.
According to the first aspect of the invention, two respectively by bridge arm two IGBT in series in, in the first bridge arm
An IGBT emitter stage and the first bridge arm in the 2nd IGBT colelctor electrode connection, the hair of the 3rd IGBT in the second bridge arm
The colelctor electrode connection of the 4th IGBT in emitter-base bandgap grading and the second bridge arm；
The first end of the first electric capacity in the bridge arm be made up of two identical capacitances in series and the first end of the second electric capacity
Connection；
The second end connection of the colelctor electrode, the colelctor electrode of the 3rd IGBT and the first electric capacity of the first IGBT, the hair of the 2nd IGBT
The second end connection of emitter-base bandgap grading, the emitter stage of the 3rd IGBT and the second electric capacity.
Above-mentioned aspect of the invention, light storage current transformer also includes ac control module, and ac control module includes handing over
Stream current sampling circuit, alternating voltage phase sample circuit, DC voltage sample circuit, alternating-current controller and alternating current drive signal
Output circuit, alternating-current controller is electric with alternating current sample circuit, alternating voltage phase sample circuit, DC voltage sampling respectively
Road and alternating current drive signal output circuit are connected；
Alternating current sample circuit is connected with the three-phase alternating current terminals of power network, for gathering between filter circuit and power network
Alternating current, and transmit to alternating-current controller；
Alternating voltage phase sample circuit is connected with the three-phase alternating current terminals of power network, for gathering filter circuit and power network
Between three-phase voltage phase, and transmit to alternating-current controller；
DC voltage sample circuit is connected with the two ends of three in three-phase inverting circuit bridge arms in parallel, for gathering three contraries
Become the DC voltage at bridge arm two ends in parallel in circuit, and transmit to alternating-current controller；
Alternating-current controller, for receiving alternating current, the phase of three-phase voltage and DC voltage, and DC/AC modules
The reference reactive current of reference voltage and DC/AC modules, the drive signal of IGBT in the first bridge arm of generation and the second bridge arm, and to
Alternating current drive signal output circuit exports the drive signal for driving IGBT in the first bridge arm and the second bridge arm；
Alternating current drive signal output circuit is connected with the gate pole of the 2nd IGBT and the 4th IGBT, and via phase inverter and
The gate pole connection of one IGBT and the 3rd IGBT, drives for being transmitted to an IGBT, the 2nd IGBT, the 3rd IGBT and the 4th IGBT
Signal.
Above-mentioned aspect of the invention, light storage current transformer also includes DC/DC modules, the high-pressure side of DC/DC modules and DC/
The DC side connection of AC modules, DC/DC modules include：At least two energy storage inductors, at least two bi-directional half bridge circuits in parallel
With an output filter capacitor, wherein,
Each bi-directional half bridge circuit is in series by two IGBT at least two bi-directional half bridge circuits, each bi-directional half bridge
Each IGBT reverse parallel connection has diode in circuit, and the midpoint of each bi-directional half bridge circuit is connected by an energy storage inductor respectively
To the positive pole with each bi-directional half bridge circuit corresponding power；
Two ends of the two ends of at least two bi-directional half bridge circuits with an output filter capacitor are in parallel.
Above-mentioned aspect of the invention, each bi-directional half bridge circuit at least two bi-directional half bridge circuits includes boosting
The emitter stage connection of the colelctor electrode and step-down IGBT of IGBT and step-down IGBT, the IGBT that boosts, the emitter stage and power supply of the IGBT that boosts
Negative pole connection.
Above-mentioned aspect of the invention, light storage current transformer is also included for controlling at least two bi-directional half bridge circuits respectively
At least two DC control modules, each DC control module include supply voltage sample circuit, DC current sample circuit,
DC controller and DC driven signal output apparatus；
Supply voltage sample circuit, the power supply electricity for gathering the both ends of power that corresponding bi-directional half bridge circuit is connected
Pressure, and transmit to DC controller；
DC current sample circuit and the power supply of the positive pole for gathering the power supply that corresponding bi-directional half bridge circuit is connected
Electric current, and transmit to DC controller；
DC controller, for receiving supply voltage, source current, and DC/DC modules reference voltage, reference current
With refer to active power, to generate and give DC driven signal for driving the drive signal of corresponding bi-directional half bridge circuit, and export
Output circuit；
DC driven signal output apparatus are connected with the gate pole of the boosting IGBT in corresponding bi-directional half bridge circuit, and are passed through
Phase inverter is connected with the gate pole of the step-down IGBT in corresponding bi-directional half bridge circuit, in corresponding bi-directional half bridge circuit
Boosting IGBT and step-down IGBT transmission drive signals.
Above-mentioned aspect of the invention, the phase of the drive signal of at least two DC controllers output is spaced successively
360/N degree, wherein, N represents the number of bi-directional half bridge circuit.
Second aspect, the invention provides the control method that a kind of light stores up current transformer, the light for first aspect stores up unsteady flow
Device, the method includes：
Gather the alternating current of grid side and the alternating voltage phase of grid side；
The watt current and reactive current of grid side are calculated based on alternating current and alternating voltage phase；
Gather the DC voltage of DC/DC modules；
DC voltage based on DC/DC modules and the deviation between the given reference voltage of DC/AC modules, calculate grid side
Given reference watt current；
Deviation, grid side between given reference watt current and the watt current of grid side based on grid side it is given
With reference to deviation and alternating voltage phase between reactive current and the reactive current of grid side, generate for driving the first bridge
The drive signal of the IGBT in arm and the second bridge arm；
Drive signal is transmitted by alternating current drive signal output circuit for IGBT into the first bridge arm and the second bridge arm.
According to the second aspect of the invention, method also includes：
When DC/DC modules are in constant current operation state, following steps are performed：
The source current of the positive pole of the power supply that collection bi-directional half bridge circuit is connected；
Calculated for driving bi-directional half bridge based on the deviation between source current and the given reference current value of DC/DC modules
The drive signal of circuit I GBT；
To be used to drive the drive signal of bi-directional half bridge circuit IGBT to transmit to double by DC driven signal output apparatus
To half-bridge circuit IGBT.
Above-mentioned aspect of the invention, method also includes：
When DC/DC modules are in constant pressure working condition, following steps are performed：
The supply voltage and the DC current of positive pole of the both ends of power that collection bi-directional half bridge circuit is connected；
The reference of DC/DC modules is calculated based on the deviation between supply voltage and the given voltage reference value of DC/DC modules
Current value；
Deviation between reference current value based on DC current and DC/DC modules calculates the drive of bi-directional half bridge circuit IGBT
Dynamic signal；
The drive signal of bi-directional half bridge circuit IGBT is transmitted to bi-directional half bridge electricity by DC driven signal output apparatus
Road IGBT.
Above-mentioned aspect of the invention, method also includes：
When DC/DC modules are in invariable power working condition, following steps are performed：
The supply voltage and the DC current of positive pole of the both ends of power that collection bi-directional half bridge circuit is connected；
DC/DC modules are calculated based on the deviation between supply voltage and the given active power reference value of DC/DC modules
Reference current value；
Deviation between reference current value based on DC current and DC/DC modules calculates the drive of bi-directional half bridge circuit IGBT
Dynamic signal；
The drive signal of bi-directional half bridge circuit IGBT is transmitted to bi-directional half bridge electricity by DC driven signal output apparatus
Road IGBT.
Above-mentioned aspect of the invention, the phase of the drive signal of IGBT is spaced 360/N successively in bi-directional half bridge circuit
Degree, wherein, N represents the number of bi-directional half bridge circuit.
The embodiment of the invention provides a kind of light storage current transformer and light stores up the control method of current transformer, in the embodiment of the present invention
The DC/AC modules of light storage current transformer include three-phase inverting circuit and filter circuit, wherein, three parallel connections of three-phase inverting circuit
Bridge arm includes a bridge arm being made up of two identical capacitances in series, i.e., the bridge arm being made up of two identical capacitances in series
One is substituted in original DC/AC modules by bridge arm two IGBT in series, DC/AC modules is reduced two IGBT and two
Individual fly-wheel diode, not only reduces the quantity for having carried out device in DC/AC modules, reduces the volume of DC/AC modules, can be with letter
Change circuit, reduce requirement of the circuit to radiating, improve the security reliability of system, reduce the cost that light stores up current transformer.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for the embodiment of the present invention
Accompanying drawing is briefly described, it should be apparent that, drawings described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 shows that light according to an embodiment of the invention stores up the schematic diagram of current transformer；
Fig. 2 shows the schematic diagram of ac control module in the light storage current transformer according to Fig. 1；
Fig. 3 shows the schematic diagram of DC control module in the light storage current transformer according to Fig. 1；
Fig. 4 is the indicative flowchart of the control method of the light storage current transformer provided according to one embodiment of the invention.
Wherein：110- three-phase inverting circuits；120- filter circuits；130- bi-directional half bridge circuits；140- DC voltages are sampled
Circuit；150- alternating voltage phase sample circuits；160- alternating-current controllers；170- supply voltage sample circuits；180- direct current controls
Device processed；190- alternating current sample circuits.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The control method that a kind of light stores up current transformer and light storage current transformer, light storage current transformer bag are provided in the embodiment of the present invention
DC/DC modules and DC/AC modules are included, DC/DC modules can be used for being adjusted DC voltage, and DC/AC modules can be used for
Changed between direct current and exchange, the high-pressure side of DC/DC modules is connected with the DC side of DC/AC modules, i.e. the high pressure of DC/DC modules
Side positive pole is connected with the positive pole of the DC side of DC/AC modules, the high-pressure side negative pole of DC/DC modules and the DC side of DC/AC modules
Negative pole connection, the low-pressure side of DC/DC modules is connected, the exchange of DC/AC modules with power supply (such as energy-storage battery, photovoltaic cell)
Side is connected with power network；The control method of current transformer is stored up in the embodiment of the present invention by light, the electric energy of power supply can be stored up by light
Current transformer is transferred to grid side come net side electricity consumption of powering, and can also store up current transformer by light and transmit to electricity the electric energy of grid side
Source, charges to power supply.
Fig. 1 shows that light according to an embodiment of the invention stores up the schematic diagram of current transformer.As shown in figure 1, light is stored up
Current transformer DC/AC modules, DC/AC modules include：Three-phase inverting circuit 110 and filter circuit 120.
Wherein, three-phase inverting circuit 110 includes three bridge arms of parallel connection, and three bridge arms of parallel connection include two respectively by two
Bridge arm individual IGBT in series and a bridge arm being made up of two identical capacitances in series, wherein, connected by two IGBT
Each IGBT reverse parallel connection in the bridge arm of composition has fly-wheel diode, the midpoint point of each bridge arm in three bridge arms of parallel connection
Not Tong Guo corresponding filter circuit 120 be connected to the three-phase alternating current terminals of power network.
The DC/AC modules of light storage current transformer include three-phase inverting circuit 110 and filter circuit 120 in the embodiment of the present invention,
Wherein, the bridge arm of three parallel connections of three-phase inverting circuit includes a bridge arm being made up of two identical capacitances in series, i.e.,
The bridge arm being made up of two identical capacitances in series substitutes in original DC/AC modules one by bridge two IGBT in series
Arm, makes DC/AC modules reduce two IGBT and two fly-wheel diodes, not only reduces the number for having carried out device in DC/AC modules
Amount, reduces the volume of DC/AC modules, can also simplify circuit, reduce requirement of the circuit to radiating, and improves circuit system
Security reliability, reduces the cost that light stores up current transformer.
It is understood that as shown in figure 1, in the three-phase inverting circuit 110 of the embodiment of the present invention, at two respectively by two
In bridge arm individual IGBT in series, the 2nd IGBT in the emitter stage and the first bridge arm of the IGBTVT7 in the first bridge arm
The colelctor electrode of VT8 is connected, the 4th IGBT VT10's in the emitter stage and the second bridge arm of the 3rd IGBT VT9 in the second bridge arm
Colelctor electrode is connected；The first end of the first electric capacity C2 in the bridge arm be made up of two identical capacitances in series and the second electric capacity C3's
First end is connected；The second end connection of the colelctor electrode, the colelctor electrode of the 3rd IGBT VT9 and the first electric capacity C2 of the first IGBT VT7,
The second end connection of the emitter stage, the emitter stage of the 4th IGBTVT10 and the second electric capacity C3 of the 2nd IGBTVT8.
Specifically, in three-phase inverting circuit 110, the first bridge arm and second are included by two IGBT bridge arms in series
Bridge arm, the first bridge arm is in series by VT7 emitter stages and VT8 colelctor electrodes, and the second bridge arm is by VT9 emitter stages and VT10 colelctor electrode strings
Connection is constituted, and the bridge arm being made up of two identical capacitances in series is by two first ends series connection structures of identical equalizing capacitance C2 and C3
Into, VT7, VT8, VT9 and VT10 difference one fly-wheel diode of reverse parallel connection, i.e. VT7 and diode VD7 reverse parallel connections, VT8 with
Diode VD8 reverse parallel connections, VT9 and diode VD9 reverse parallel connections, VT10 and diode VD10 reverse parallel connections.Wherein, three simultaneously
The midpoint of each bridge arm in the bridge arm of connection be respectively the tie point that VT7 connects with VT8, the tie point that VT9 connects with VT10, with
And the tie point of C2 and C3 series connection, this three midpoints are connected with the three-phase alternating current terminals of power network respectively by filter circuit 120
Connect, connected mode can be as shown in fig. 1, it is also possible to connect by other means.As shown in figure 1, the tie point of C2 and C3 with
The A of the three-phase alternating current terminals of power network is connected, VT7 is connected with the tie point of VT8 with the B of the three-phase alternating current terminals of power network
Connect, VT9 is connected with the tie point of VT10 with the C of the three-phase alternating current terminals of power network.
It should be noted that DC/AC modules are two-way circuit, filter circuit 120 in DC/AC modules be used for power network with
The voltage and current transmitted between DC/AC modules is filtered.Circuit structure in filter circuit 120 is not limited.Specifically,
The structure of filter circuit 120 can as shown in fig. 1, including filter inductance (L4, L5, L6) and filter capacitor (C4, C5, C6),
The two ends of filter inductance L4 connect with the A of the three-phase alternating current of the tie point and power network of C2 and C3 respectively line end be connected, filter inductance
The two ends of L5 connect with VT7 and the B of the three-phase alternating current of the tie point and power network of VT8 respectively line end be connected, the two of filter inductance L6
The line end that connects with VT9 and the C of the three-phase alternating current of the tie point and power network of VT10 respectively is held to be connected；Filter capacitor C5 one end simultaneously with
Filter capacitor C6, filter inductance L4 are connected, and the filter capacitor C5 other ends are connected with filter capacitor C4, filter inductance L5 simultaneously, filter
Ripple electric capacity C4 is connected with filter capacitor C6, filter inductance L6 simultaneously.
Fig. 2 shows the schematic diagram of ac control module in the light storage current transformer according to Fig. 1.Of the invention real
Apply in example, light storage current transformer also includes ac control module, ac control module is used to control IGBT in three-phase inverting circuit 110
Turn on and off, and then control DC/AC modules operation.As shown in Fig. 2 ac control module includes alternating current sampling electricity
Road 190, alternating voltage phase sample circuit 150, DC voltage sample circuit 140, alternating-current controller 160 and alternating current drive signal
Output circuit, alternating-current controller 160 respectively with alternating current sample circuit 190, alternating voltage phase sample circuit 150, direct current
Voltage sampling circuit 140 and drive circuit are connected.
Wherein, alternating current sample circuit 190 is connected with the three-phase alternating current terminals of power network, for gathering filter circuit
Alternating current i between 120 and power networka、ib、ic, and transmit to alternating-current controller 160；Alternating voltage phase sample circuit 150
Be connected with the three-phase alternating current terminals of power network, for by voltage sensor and phaselocked loop gather filter circuit 120 and power network it
Between three-phase voltage phase γ, and transmit to alternating-current controller 160；DC voltage sample circuit 140 and three-phase inverting circuit
Three two ends connections of bridge arm in parallel in 110, the DC voltage for gathering bridge arm two ends in parallel in three-phase inverting circuit 110
Vdc, and transmit to alternating-current controller 160；Alternating-current controller 160, the exchange for receiving the collection of alternating current sample circuit 190
Electric current ia、ib、ic, alternating voltage phase sample circuit 150 collection three-phase voltage phase γ and DC voltage sample circuit
The DC voltage V of 140 collectionsdc, and DC/AC modules reference voltage Vdc *With the reference reactive current i of DC/AC modulesq *, it is raw
Drive signal U1, U2 of IGBT into the first bridge arm and the second bridge arm, and exported for driving to alternating current drive signal output circuit
Drive signal U1, U2 of IGBT in dynamic first bridge arm and the second bridge arm；Alternating current drive signal output circuit and the 2nd IGBT VT8
Gate pole with the 4th IGBT VT10 is connected, and via the gate pole company of phase inverter and an IGBT VT7 and the 3rd IGBT VT9
Connect, for transmitting drive signal U1 to an IGBT VT7 and the 2nd IGBT VT8, and to the 3rd IGBT VT9 and the 4th
IGBT VT10 transmission drive signals U2.
Specifically, in the embodiment of the present invention, alternating current sample circuit 190, alternating voltage phase sample circuit 150 and straight
The circuit structure for flowing voltage sampling circuit 140 is not limited.For example, alternating current sample circuit 190, alternating voltage phase is adopted
The circuit framework of the circuit structure of sample circuit 150 and DC voltage sample circuit 140 can be as shown in Figure 2.Alternating-current controller 160
It is three-phase alternating current i in the alternating current of the collection of reception alternating current sample circuit 190a、ib、ic, alternating-current controller 160 can
Coordinate Conversion is carried out with the three-phase alternating current first to receiving, based on the synchronous rotating frame under dq coordinates, using coordinate
Become the of ac i in rest frame of changing commandersa、ib、icIt is transformed into the DC quantity i under synchronous coordinate systemd、iq, alternating-current controller 160
First by three-phase alternating current ia、ib、icBe converted to i under α β coordinate systemsαAnd iβ, then in conjunction with alternating voltage phase sample circuit 150
The phase γ of the three-phase voltage of collection, by i under α β coordinate systemsαAnd iβBe converted to the i under dq coordinatesd、iq.As shown in Fig. 2 exchange
Controller 160 mainly includes DC voltage control, watt current control and reactive current control.DC voltage control act as
Stabilization or regulation reference voltage Vdc *, the DC voltage V of the collection of DC voltage control introducing DC voltage sample circuit 140dcAs
Feedback, alternating-current controller 160 is based on reference voltage Vdc *With DC voltage VdcDeviation, and be capable of achieving by the first adjuster
To the reference voltage V of DC voltagedc *Zero steady state error control.Due to reference voltage Vdc *Control can be by idThe control for carrying out
To realize, therefore the output of the first adjuster is with reference to watt current id *, alternating-current controller 160 be based on refer to watt current
id *And idDeviation, and be capable of achieving to be controlled the watt current of DC/AC modules by the 3rd adjuster, so realize it is right
The active power of DC/AC modules is controlled.The reference reactive current i of reactive current controlq *Can be according to need to be conveyed to power network
Reactive power reference qref show that alternating-current controller 160 is based on reference to reactive current iq *And iqDeviation, and by second regulation
Device is capable of achieving to be controlled the reactive current of DC/AC modules, and then realizes controlling the reactive power of DC/AC modules
Make, in season iq *When=0, DC/AC modules work in unity power factor state, only convey active power to power network.Exchange control
Device 160 can generate the drive signal U1, Yi Jiyong for driving IGBT (VT7 and VT8) in the first bridge arm by said process
The drive signal U2 of IGBT (VT9 and VT10) in the second bridge arm is driven.As shown in Fig. 2 the door of drive circuit and VT8 and VT9
Pole connects, and is connected with the gate pole of VT7 and VT10 by phase inverter, transmit it is mutually opposing to the drive signal of VT7 and VT8,
Transmit mutually opposing to the drive signal of VT9 and VT10.
It should be noted that in alternating-current controller 160 first adjuster, the second adjuster and the 3rd adjuster it is specific
Structure can be arranged as required to, and such as the first adjuster, the second adjuster and the 3rd adjuster are proportion integral control device.
The phase for drive signal U1 and U2 of the generation of alternating-current controller 160 differs 120 °.In DC/AC module routines, C2,
Working condition (the voltage and current that the bridge arm of C3 series connection is converted according to the conducting of difference IGBT in the first bridge arm and the second bridge arm
Size, direction) be forced to the change of current, so as to the three-phase alternating current sum for realizing power network is zero.
In the present invention is implemented, due to there was only two in three-phase inverting circuit 110 by bridge arm IGBT in series, so
Also only need to export two-way drive signal in ac control module, and then simplify drive circuit, so as to further increase electricity
The security reliability of road system, reduces the cost that light stores up current transformer.
As an optional embodiment, as shown in figure 1, light storage current transformer also includes DC/DC modules, DC/DC module bags
Include：At least two energy storage inductors, at least two bi-directional half bridge circuits 130 (is only labelled with Fig. 1) in parallel and one are defeated
Go out filter capacitor C1, wherein, each bi-directional half bridge circuit 130 is connected by two IGBT at least two bi-directional half bridge circuits 130
Constitute, each IGBT reverse parallel connection has diode in each bi-directional half bridge circuit 130, the midpoint of each bi-directional half bridge circuit 130
The positive pole with the corresponding power of each bi-directional half bridge circuit 130 is connected to by an energy storage inductor respectively；At least two two-way half
Two ends of the two ends of bridge circuit 130 with an output filter capacitor are in parallel；The high-pressure side of DC/DC modules and DC/AC modules
DC side is connected, i.e. the high-pressure side positive pole of DC/DC modules is connected with the positive pole of the DC side of DC/AC modules, the height of DC/DC modules
Pressure side negative pole is connected with the negative pole of the DC side of DC/AC modules.
In the embodiment of the present invention, at least two bi-directional half bridge circuits 130 in DC/DC modules respectively with corresponding power supply
Connection, i.e., DC/DC modules can simultaneously be connected with multiple power supplys, multiple power supplys can be different magnitudes of voltage so that realize compared with
The energy-storage battery of wide-voltage range is connected with light storage current transformer simultaneously, realizes the flexible configuration of different magnitude of voltage batteries, increased
Light stores up the use scope of current transformer；Also, at least two bi-directional half bridge circuits 130 connect different type respectively in DC/DC modules
Power supply, it is to avoid when being connected with DC/DC modules after different types of power sources in series, because the type of power supply is different, power supply is not
With fully using, the problem for causing power supply to waste.
It is understood that as shown in figure 1, each in the embodiment of the present invention, at least two bi-directional half bridge circuits 130
Bi-directional half bridge circuit 130 includes boosting IGBT and step-down IGBT, and the colelctor electrode of the IGBT that boosts and the emitter stage of step-down IGBT are connected,
The emitter stage of boosting IGBT is connected with the negative pole of power supply.
Specifically, as shown in figure 1, in the embodiment of the present invention so that DC/DC modules include three bi-directional half bridge circuits 130 as an example
Illustrate.DC/DC modules include three bi-directional half bridge circuits, 130, three energy storage inductors (L1, L2, L3) and an output filter
Ripple electric capacity C1.Three bi-directional half bridge circuits 130 are connected by the IGBT and step-down IGBT that boosts respectively, wherein, step-down IGBT VT1's
The colelctor electrode string of the colelctor electrode series connection, the emitter stage of step-down IGBT VT3 and boosting IGBT VT4 of emitter stage and boosting IGBT VT2
The colelctor electrode series connection of connection, the emitter stage of step-down IGBT VT5 and boosting IGBT VT6.And in bi-directional half bridge circuit 130, rise
Pressure IGBT reverse parallel connections step-down fly-wheel diode, step-down IGBT reverse parallel connection boostings fly-wheel diode, i.e. VT1 reverse parallel connections VD1,
VT2 reverse parallel connection VD2, VT3 reverse parallel connection VD3, VT4 reverse parallel connection VD4, VT5 reverse parallel connection VD5, VT6 reverse parallel connections VD6.It is double
To the midpoint of half-bridge circuit 130, that is, the tie point of boost IGBT and step-down IGBT, by an energy storage inductor and corresponding power supply
Positive pole connection, as shown in figure 1, the tie point of VT1 and VT2 be connected with the positive pole of DC1 by L1, the tie point of VT3 and VT4 it is logical
Cross that L2 is connected with the positive pole of DC2, the tie point of VT5 and VT6 is connected by L3 with the positive pole of DC3, the negative pole of all power supplys is mutual
Connection, and it is connected to the negative pole of boosting IGBT in bi-directional half bridge circuit 130.Three two ends of bi-directional half bridge circuit 130 in parallel
Two ends with C1 are in parallel, and in parallel with two sections of the bridge arm of three-phase inverting circuit 110 in DC/AC modules.
In embodiments of the present invention, bi-directional half bridge circuit 130 operationally, is in half-bridge conducting state, with Fig. 1
As a example by the bi-directional half bridge circuit 130 of VT1 and VT2 series connection, when battery DC1 discharges, DC/DC modules work in pressure-increasning state, this
When, VT2 and VD1 conductings in the bi-directional half bridge circuit 130 of VT1 and VT2 series connection realize that circuit boosts, and the energy of battery is passed through
DC/AC modules are sent to grid side；When battery DC1 charges, DC/DC modules work in step-down state, and VT1 and VD2 is turned on, and is realized
Circuit is depressured, and draws energy from grid side through DC/AC modules and is charged to battery DC1.
Fig. 3 shows the schematic diagram of DC control module in the light storage current transformer according to Fig. 1.Light stores up current transformer
Also include at least two DC control modules for controlling at least two bi-directional half bridge circuits 130 respectively, each DC control
Module includes supply voltage sample circuit 170, DC current sample circuit, DC controller 180 and DC driven signal transmission
Circuit.
Wherein, supply voltage sample circuit 170, for gathering the power supply two that corresponding bi-directional half bridge circuit 130 is connected
The supply voltage V at endfd, and transmit to DC controller 180；DC current sample circuit, the circuit between DC1 and L1 connects
Connect, the source current i of the positive pole for gathering the power supply that corresponding bi-directional half bridge circuit 130 is connected by current sensorfd,
And transmit to DC controller 180；DC controller 180, for receiving supply voltage Vfd, source current ifd, and DC/DC
The reference voltage V of moduleref, reference current irefWith refer to active-power Pref(not marked in Fig. 3), generates for driving correspondence
Bi-directional half bridge circuit 130 drive signal U3, and export and give DC driven signal output apparatus；DC driven signal output electricity
Road connects with the gate pole of the boosting IGBT in corresponding bi-directional half bridge circuit 130, and by phase inverter and corresponding bi-directional half bridge
The gate pole connection of the step-down IGBT in circuit 130, for the boosting IGBT in corresponding bi-directional half bridge circuit 130 and step-down
IGBT transmission drive signals U3.
Specifically, DC control module is mainly used in realizing being controlled the working condition of DC/DC modules.For DC/
Each bi-directional half bridge circuit 130 in DC modules is respectively provided with corresponding DC control module.As shown in figure 3, the present invention is real
Apply in example and illustrated by taking the corresponding DC control module of bi-directional half bridge circuit 130 that VT1 and VT2 connects as an example.For VT1 and
The corresponding DC control module of bi-directional half bridge circuit 130 of VT2 series connection, including supply voltage sample circuit 170, for gathering electricity
The supply voltage at source DC1 two ends；DC current sample circuit, the circuit between DC1 and L1 is connected, for by current sense
Electric current between device collection DC1 and L1, i.e. source current；DC controller 180 be based on receive supply voltage, source current and
The reference voltage of given DC/DC modules, entered the 4th adjuster and the 5th adjuster generates drive for driving VT1 and VT2
Dynamic signal；Drive signal transmits the gate pole to VT1 and VT2 by drive circuit, thus realize control VT1 and VT2 conducting and
Shut-off, wherein drive circuit is directly connected to the gate pole of VT2, and is connected with the gate pole of VT1 by phase inverter, the VT1 and VT2 for making
Drive signal it is complementary.
It should be noted that DC/DC modules can set multiple-working mode, for example, constant current mode, constant voltage mode and perseverance
Power mode.When DC/DC modules are in constant current mode, the supply voltage sample circuit 170 and the 4th in DC control module is adjusted
Section device does not work, the reference current i of DC/DC modulesrefGiven by given instruction, DC controller 180 is based on reference current
irefThe source current i gathered with DC current sample circuitfdBetween deviation, by the 5th adjuster generate drive signal；When
Power supply DC1 voltages are charged to when determining upper voltage limit or discharging into given voltage lower limit, the control of DC controller 180 DC/DC
Module from service.When DC/DC modules are in constant voltage mode, DC controller 180 is based on given reference voltage VrefAnd power supply
The supply voltage V of the collection of voltage sampling circuit 170fdBetween deviation, reference current i is generated by the 4th adjusterref, and then
Based on reference current irefThe source current i gathered with DC current sample circuitfdBetween deviation, by the 5th adjuster give birth to
Into drive signal, DC/DC modules is in constant pressure charging and discharging state, i.e., the Isobarically Control to voltage is realized by electric current.DC/DC
When module is in constant power mode, DC controller 180 calculates reference current i by given power and cell voltageref, enter
And it is based on reference current irefThe source current i gathered with DC current sample circuitfdBetween deviation, by the 5th adjuster
Generation drive signal.
It is understood that in the embodiment of the present invention, the phase of the drive signal of each DC controller 180 output is successively
Interval 360/N degree, wherein, N represents the number of bi-directional half bridge circuit 130.
Wherein, each DC controller 180 is exported by the control signal of carrier modulation, Ke Yitong in the embodiment of the present invention
It is that mode realizes that the phase of drive signal is spaced 360/N degree successively to cross the mutual mistake 360/N degree of carrier wave.
Due to being filtered by an output filter capacitor C1 in DC/DC modules, used between each bi-directional half bridge circuit 130
Misphase control program, when each bi-directional half bridge circuit 130 works simultaneously, carrier wave is mutually wrong 360/N °, and output is reduced to greatest extent
Current ripples on filter capacitor C1, reduce to filter capacitor requirement.
It should be noted that in the embodiment of the present invention, the power supply being connected with DC/DC modules can be battery, can be with
It is photovoltaic cell.If the power supply being connected with DC/DC modules is photovoltaic cell, embodiment of the present invention photovoltaic converter can be with
Multiple photovoltaic cell connections, you can to increase multiple MPPT, so as to cell panel mismatch problems can be solved to a certain extent, increase
To the electricity that power network is exported.
Fig. 4 is the indicative flowchart of the control method of the light storage current transformer provided according to one embodiment of the invention.Fig. 4 institutes
The control method of the light storage current transformer for showing is used to store up current transformer to the light described in Fig. 1-Fig. 3, and the method includes：201, gather power network
The alternating current of side and the alternating voltage phase of grid side；202, grid side is calculated based on alternating current and alternating voltage phase
Watt current and reactive current；203, gather the DC voltage of DC/DC modules；204, DC voltage based on DC/DC modules and
Deviation between the given reference voltage of DC/AC modules, calculates the given reference watt current of grid side；205, based on grid side
Given reference watt current and the watt current of grid side between deviation, the given reference reactive current of grid side and power network
Deviation and alternating voltage phase between the reactive current of side, generate in the first bridge arm of driving and the second bridge arm
The drive signal of IGBT；206, drive signal is transmitted to the first bridge arm and the second bridge arm by alternating current drive signal output circuit
In IGBT.
It should be noted that step 201- steps 206 are that DC/AC modules in light storage current transformer are controlled, its control
The data processing principle and process of method are essentially identical with data processing principle in embodiment illustrated in fig. 2 and process, it is secondary no longer
Repeat.
Used as an optional embodiment, the control method of light storage current transformer also includes what DC/DC modules were controlled
Process, i.e., on the basis of step 201- steps 206, when DC/DC modules are in constant current operation state, also include：207, adopt
The source current of the positive pole of the power supply that collection bi-directional half bridge circuit 130 is connected；208, giving based on source current and DC/DC modules
Determine the deviation between reference current value and calculate drive signal for driving IGBT in bi-directional half bridge circuit 130；209, by straight
Stream driving signal output circuit is by for driving the drive signal of IGBT in bi-directional half bridge circuit 130 to transmit to bi-directional half bridge circuit
IGBT in 130.
Used as an optional embodiment, the control method of light storage current transformer also includes what DC/DC modules were controlled
Process, i.e., on the basis of step 201- steps 206, when DC/DC modules are in constant pressure working condition, the method also includes：
210, the supply voltage and the DC current of positive pole of the both ends of power that collection bi-directional half bridge circuit 130 is connected；211, based on electricity
Deviation between source voltage and the given voltage reference value of DC/DC modules calculates the reference current value of DC/DC modules；212, it is based on
Deviation between the reference current value of DC current and DC/DC modules calculates the drive signal of IGBT in bi-directional half bridge circuit 130；
213, the drive signal of IGBT is transmitted into the IGBT into bi-directional half bridge circuit 130 by DC driven signal output apparatus.
Used as an optional embodiment, the control method of light storage current transformer also includes what DC/DC modules were controlled
Process, i.e., on the basis of step 201- steps 206, when DC/DC modules are in invariable power working condition, the method is also wrapped
Include：214, the supply voltage and the DC current of positive pole of the both ends of power that collection bi-directional half bridge circuit 130 is connected；215, it is based on
Deviation between supply voltage and the given voltage reference value of DC/DC modules calculates the reference current value of DC/DC modules；216, base
Deviation between the reference current value of DC current and DC/DC modules calculates the driving letter of IGBT in bi-directional half bridge circuit 130
Number；217, the drive signal of IGBT is transmitted into the IGBT into bi-directional half bridge circuit 130 by DC driven signal output apparatus.
It is understood that described in step 207- steps 209, step 210- steps 213 and step 214- steps 217
Method is respectively control process of the DC/DC modules under different working condition, in above-mentioned three kinds of different control process, may be used also
360/N degree is spaced successively with by the phase of the drive signal of IGBT in bi-directional half bridge circuit 130, wherein, N represents bi-directional half bridge electricity
The number on road 130.The number of above-mentioned steps 207- steps 209, step 210- steps 213 and step 214- step 217 methods describeds
It is essentially identical with data processing principle in embodiment illustrated in fig. 3 and process according to handling principle and process, repeated no more secondary.
In embodiments of the invention, unless otherwise clearly defined and limited, term " connected ", " connection " should do broad sense reason
Solution, for example, it may be being fixedly connected, or being detachably connected, or is integrally connected；Can mechanically connect, it is also possible to
It is electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary.For one of ordinary skill in the art
Speech, visual concrete condition understands above-mentioned term concrete meaning in the present invention.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Those familiar with the art the invention discloses technical scope in, various equivalent modifications can be readily occurred in or replaced
Change, these modifications or replacement should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection domain be defined.
Claims (12)
1. a kind of light storage current transformer, including DC/AC modules, it is characterised in that the DC/AC modules include：Three-phase inverting circuit
(110) and filter circuit (120), wherein,
The three-phase inverting circuit (110) includes three bridge arms of parallel connection, the bridge arm of three parallel connections include two respectively by
Two insulated gate bipolar transistor IGBTs bridge arm and a bridge arm being made up of two identical capacitances in series in series,
Wherein, each the IGBT reverse parallel connection in the bridge arm in series by two IGBT has fly-wheel diode, and described three simultaneously
The midpoint of each bridge arm in the bridge arm of connection is connected to the three-phase of power network by three corresponding filter circuits (120) respectively
AC terminal.
2. light according to claim 1 stores up current transformer, it is characterised in that described two respectively by two IGBT series connection structures
Into bridge arm in, the connection of the colelctor electrode of the 2nd IGBT in the emitter stage and the first bridge arm of the IGBT in the first bridge arm, the
The colelctor electrode connection of the 4th IGBT in the emitter stage and the second bridge arm of the 3rd IGBT in two bridge arms；
The first end and the first end of the second electric capacity of the first electric capacity in the bridge arm being made up of two identical capacitances in series
Connection；
The second end connection of the colelctor electrode, the colelctor electrode of the 3rd IGBT and first electric capacity of the first IGBT, it is described
The second end connection of the emitter stage of the 2nd IGBT, the emitter stage of the 4th IGBT and second electric capacity.
3. light according to claim 2 stores up current transformer, it is characterised in that the light storage current transformer also includes handing over flow control module
Block, the ac control module includes alternating current sample circuit (190), alternating voltage phase sample circuit (150), direct current
Pressure sample circuit (140), alternating-current controller (160) and alternating current drive signal output circuit, the alternating-current controller (160) is respectively
With the alternating current sample circuit (190), the alternating voltage phase sample circuit (150), DC voltage sampling electricity
Road (140) and the alternating current drive signal output circuit are connected；
The alternating current sample circuit (190) is connected with the three-phase alternating current terminals of the power network, for gathering the filtering
Alternating current between circuit (120) and the power network, and transmit to the alternating-current controller (160)；
The alternating voltage phase sample circuit (150) is connected with the three-phase alternating current terminals of the power network, described for gathering
The phase of the three-phase voltage between filter circuit (120) and the power network, and transmit to the alternating-current controller (160)；
The DC voltage sample circuit (140) is connected with the two ends of three in the three-phase inverting circuit (110) bridge arms in parallel,
For gathering the DC voltage at bridge arm two ends in parallel in the three-phase inverting circuit (110), and transmit to the alternating-current controller
(160)；
The alternating-current controller (160), for receiving the alternating current, the phase of the three-phase voltage and the direct current
Pressure, and the DC/AC modules reference voltage and the reference reactive current of the DC/AC modules, generate first bridge arm
With the drive signal of IGBT in second bridge arm, and exported for driving described to the alternating current drive signal output circuit
The drive signal of IGBT in one bridge arm and second bridge arm；
The alternating current drive signal output circuit is connected with the gate pole of the 2nd IGBT and the 4th IGBT, and via anti-
Phase device is connected with the gate pole of an IGBT and the 3rd IGBT, for an IGBT, the 2nd IGBT, institute
State the 3rd IGBT and the 4th IGBT transmission drive signals.
4. the light according to claim any one of 1-3 stores up current transformer, it is characterised in that the light storage current transformer also includes
DC/DC modules, the high-pressure side of the DC/DC modules is connected with the DC side of the DC/AC modules, and the DC/DC modules include：
At least two energy storage inductors, at least two bi-directional half bridge circuits (130) and an output filter capacitor in parallel, wherein,
Each bi-directional half bridge circuit (130) is in series by two IGBT at least two bi-directional half bridge circuit (130), institute
Each IGBT reverse parallel connection has diode in stating each bi-directional half bridge circuit (130), each bi-directional half bridge circuit (130)
Midpoint is connected to the positive pole with described each bi-directional half bridge circuit (130) corresponding power by an energy storage inductor respectively；
Two ends of the two ends of at least two bi-directional half bridge circuit (130) with one output filter capacitor are in parallel.
5. light according to claim 4 stores up current transformer, it is characterised in that at least two bi-directional half bridge circuit (130)
In each bi-directional half bridge circuit (130) include boosting IGBT and step-down IGBT, the colelctor electrode and the drop of the boosting IGBT
The emitter stage connection of IGBT is pressed, the emitter stage of the boosting IGBT is connected with the negative pole of the power supply.
6. light according to claim 5 stores up current transformer, it is characterised in that the light storage current transformer is also included for controlling respectively
At least two DC control modules of at least two bi-directional half bridge circuit (130) are made, each DC control module includes electricity
Source voltage sampling circuit (170), DC current sample circuit, DC controller (180) and DC driven signal output apparatus；
The supply voltage sample circuit (170), for gathering the both ends of power that corresponding bi-directional half bridge circuit (130) is connected
Supply voltage, and transmit to the DC controller (180)；
The DC current sample circuit, the positive pole for gathering power supply that corresponding bi-directional half bridge circuit (130) is connected
Source current, and transmit to the DC controller (180)；
The DC controller (180), for receiving the supply voltage, the source current, and the DC/DC modules
Reference voltage, reference current and active power is referred to, generated for driving the driving of corresponding bi-directional half bridge circuit (130) to believe
Number, and export to the DC driven signal output apparatus；
The DC driven signal output apparatus are connected with the gate pole of the boosting IGBT in corresponding bi-directional half bridge circuit (130),
And connected with the gate pole of the step-down IGBT in corresponding bi-directional half bridge circuit (130) by phase inverter, for corresponding two-way
Boosting IGBT and step-down IGBT transmission drive signals in half-bridge circuit (130).
7. light according to claim 5 stores up current transformer, it is characterised in that at least two DC controller (180) is defeated
The phase of the drive signal for going out is spaced 360/N degree successively, wherein, N represents the number of the bi-directional half bridge circuit (130).
8. a kind of light stores up the control method of current transformer, and current transformer is stored up for the light described in claim 1-7, and methods described includes：
Gather the alternating current of the grid side and the alternating voltage phase of the grid side；
The watt current and reactive current of the grid side are calculated based on the alternating current and the alternating voltage phase；
Gather the DC voltage of the DC/DC modules；
DC voltage based on the DC/DC modules and the deviation between the given reference voltage of the DC/AC modules, calculate institute
State the given reference watt current of grid side；
Deviation, the power network between given reference watt current and the watt current of the grid side based on the grid side
Deviation and the alternating voltage phase between the given reference reactive current and the reactive current of the grid side of side, it is raw
Into the drive signal for driving the IGBT in first bridge arm and second bridge arm；
The drive signal is transmitted to first bridge arm and second bridge by the alternating current drive signal output circuit
IGBT in arm.
9. method according to claim 8, it is characterised in that methods described also includes：
When the DC/DC modules are in constant current operation state, following steps are performed：
Gather the source current of the positive pole of the power supply that the bi-directional half bridge circuit (130) is connected；
Deviation between given reference current value based on the source current and the DC/DC modules calculates described for driving
The drive signal of IGBT in bi-directional half bridge circuit (130)；
The driving that will be used to drive IGBT in the bi-directional half bridge circuit (130) by the DC driven signal output apparatus is believed
Number transmit the IGBT into the bi-directional half bridge circuit (130).
10. method according to claim 8, it is characterised in that methods described also includes：
When the DC/DC modules are in constant pressure working condition, following steps are performed：
Gather the supply voltage and the DC current of positive pole of the both ends of power that the bi-directional half bridge circuit (130) is connected；
Deviation between given voltage reference value based on the supply voltage and the DC/DC modules calculates the DC/DC moulds
The reference current value of block；
Deviation between reference current value based on the DC current and the DC/DC modules calculates the bi-directional half bridge circuit
(130) drive signal of IGBT in；
The drive signal of IGBT in the bi-directional half bridge circuit (130) is transmitted to described by DC driven signal output apparatus
IGBT in bi-directional half bridge circuit (130).
11. methods according to claim 8, it is characterised in that methods described also includes：
When the DC/DC modules are in invariable power working condition, following steps are performed：
Gather the supply voltage and the DC current of positive pole of the both ends of power that the bi-directional half bridge circuit (130) is connected；
Deviation between given active power reference value based on the supply voltage and the DC/DC modules calculates the DC/
The reference current value of DC modules；
Deviation between reference current value based on the DC current and the DC/DC modules calculates the bi-directional half bridge circuit
(130) drive signal of IGBT in；
The drive signal of IGBT in the bi-directional half bridge circuit (130) is transmitted to described by DC driven signal output apparatus
IGBT in bi-directional half bridge circuit (130).
12. method according to claim any one of 9-10, it is characterised in that in the bi-directional half bridge circuit (130)
The phase of the drive signal of IGBT is spaced 360/N degree successively, wherein, N represents the number of the bi-directional half bridge circuit.
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Application publication date: 20170531 |