CN107086788A - Solar DC converter, method for controlling power supply, air-conditioning electric power system - Google Patents
Solar DC converter, method for controlling power supply, air-conditioning electric power system Download PDFInfo
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- CN107086788A CN107086788A CN201710283421.3A CN201710283421A CN107086788A CN 107086788 A CN107086788 A CN 107086788A CN 201710283421 A CN201710283421 A CN 201710283421A CN 107086788 A CN107086788 A CN 107086788A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004378 air conditioning Methods 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 44
- 238000002955 isolation Methods 0.000 claims abstract description 44
- 239000004065 semiconductor Substances 0.000 claims description 16
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 13
- 230000001629 suppression Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 101100402275 Arabidopsis thaliana MOS11 gene Proteins 0.000 description 7
- 230000001939 inductive effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33538—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type
- H02M3/33546—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type with automatic control of the output voltage or current
- H02M3/33553—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type with automatic control of the output voltage or current with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a kind of solar DC converter, method for controlling power supply, air-conditioning electric power system, wherein, solar DC converter includes：First solar energy output control circuit, input is connected with the output end of the first solar panel, the output for controlling the first solar panel；Second solar energy output control circuit, input is connected with the output end of the second solar panel, the output for controlling the second solar panel；Transformer isolation power conversion circuit, input is connected with the output end of the first solar energy output control circuit and the output end of the second solar energy output control circuit respectively, and output end is used to be connected with load, to for load supplying.When the present invention solves that multiple solar panel groups are powered in the prior art, each cell plate group needs to correspond to the solar battery power of multi input respectively using multiple power inverters, the problem of cost is higher, the equipment cost of reduction sun-generated electric power input.
Description
Technical field
The present invention relates to solar powered technical field, controlled in particular to a kind of solar DC converter, power supply
Method processed, air-conditioning electric power system.
Background technology
At present, in solar power converting means, several kilowatts of grades are mostly using the power conversion mode do not isolated.Adopt
Although with having some superiority in the solar power converter cost, efficiency do not isolated but there are problems that earth leakage current, state
Inside and outside scholar successively proposes the power conversion topologies and control strategy of a variety of solution system earth leakage currents from different perspectives,
Such as active common mode AF panel scheme, common-mode signal is detected by electric capacity etc., then after emitter following and amplification are reverse
Common mode loop is sealed in again to offset common mode disturbances；And the three-phase four-arm scheme program is added in auxiliary bridge arm, modulation not
Zero vector can be used, the program easily makes line voltage distort；In addition with topologys such as H5, H6, HERIC, REFU.But these schemes
Both increase cost and system complexity greatly.Comprehensive Correlation, some scheme costs are higher than isolation scheme on the contrary.
In addition, cell panel is generally divided into several groups according to the difference of the putting position of cell panel and cell panel characteristic, from
And form the different several groups of sun-generated electric powers input of the parameters such as voltage or capacity.Therefore the DC converter of multi input is needed.Mesh
Correspond to the solar battery power of multi input in preceding industry respectively using multiple power inverters, cost is higher.
For when multiple solar panels are powered in correlation technique, it is necessary to using multiple power inverters respectively correspond to it is many
The solar battery power of input so that the problem of cost is higher, not yet proposes to efficiently solve scheme at present.
The content of the invention
The invention provides a kind of solar DC converter, method for controlling power supply, air-conditioning electric power system, at least to solve
, it is necessary to correspond to the solar energy of multi input respectively using multiple power inverters when multiple solar panels are powered in the prior art
Battery supply so that the problem of cost is higher.
In order to solve the above technical problems, according to the one side of the embodiment of the present disclosure, the invention provides a kind of solar energy
DC converter, including：
First solar energy output control circuit, input is connected with the output end of the first solar panel, for controlling
The output of first solar panel；
Second solar energy output control circuit, input is connected with the output end of the second solar panel, for controlling
The output of second solar panel；
Transformer isolation power conversion circuit, input respectively with the output end of the first solar energy output control circuit and
The output end connection of two solar energy output control circuits, output end is used to be connected with load, to for load supplying.
Further, the first solar energy output control circuit includes：
First diode, positive pole is connected with the positive pole of the first solar panel, and the first end of negative pole absorbs by first
Loop is connected with transformer circuit first input end, and the end of negative pole second is connected with the input of transformer second, wherein, first absorbs
Loop is used for the voltage stress that leakage inductance is produced in suppression circuit；
First metal-oxide-semiconductor, drain electrode is connected with transformer circuit first input end, the negative pole of source electrode and the first solar panel
Connection, for controlling the first solar panel whether to power.
Further, the first absorption circuit includes：
First resistor, first end is connected with the negative pole of the first diode；
First electric capacity, first end is connected with the first end of first resistor and the negative pole of the first diode respectively, the second end with
The second end connection of first resistor；
7th diode, negative pole is connected with the second end of first resistor and the second end of the first electric capacity respectively；Positive pole is distinguished
Drain electrode and transformer circuit first input end with the first metal-oxide-semiconductor are connected.
Further, the second solar energy output control circuit includes：
Second diode, positive pole is connected with the positive pole of the second solar panel, and the first end of negative pole absorbs by second
Loop is connected with the input of transformer circuit second, and the end of negative pole second is connected with transformer first input end, wherein, second absorbs
Loop is used for the voltage stress that leakage inductance is produced in suppression circuit；
Second metal-oxide-semiconductor, drain electrode is connected with the input of transformer circuit second, the negative pole of source electrode and the second solar panel
Connection, for controlling the second solar panel whether to power.
Further, the second absorption circuit includes：
Second resistance, first end is connected with the negative pole of the second diode；
Second electric capacity, first end is connected with the first end of second resistance and the negative pole of the second diode respectively, the second end with
The second end connection of second resistance；
8th diode, negative pole is connected with the second end of second resistance and the second end of the second electric capacity respectively；Positive pole is distinguished
Drain electrode and the input of transformer circuit second with the second metal-oxide-semiconductor are connected.
Further, transformer isolation power conversion circuit includes：
3rd diode, the 4th diode, the 5th diode, the bridge rectifier of the 6th diode composition, wherein, the
The positive pole of three diodes is connected with the output end of transformer second, and negative pole is connected with the negative pole of the 4th diode；4th diode
Positive pole is connected with the negative pole of the 6th diode, and is connected to the output end of transformer first；The negative pole and the three or two of 5th diode
The positive pole connection of pole pipe, positive pole is connected with the positive pole of the 6th diode, and is connected to the of transformer isolation power conversion circuit
Two output ends；
First inductance, first end is connected with the negative pole of the 3rd diode and the 4th diode, the second end and transformer isolation
The first output end connection of power conversion circuit；
3rd electric capacity, first end is connected with the first output end of transformer isolation power conversion circuit, the second end and transformation
The second output end connection of device isolation power conversion circuit.
Further, transformer isolation power conversion circuit includes：
9th diode, negative pole is connected with the output end of transformer second, positive pole and transformer isolation power conversion circuit
Second output end；
Tenth diode, positive pole is connected with the positive pole of the 9th diode, and is connected to transformer isolation power conversion circuit
The second output end, negative pole is connected with the output end of transformer first；
Second inductance, negative pole of the first end respectively with the output end of transformer second and the 9th diode is connected, the second end with
First output end of transformer isolation power conversion circuit；
3rd inductance, first end is connected with the tenth diode cathode and the output end of transformer first respectively, the second end and the
The second end connection of two inductance；
4th electric capacity, first end is connected with the first output end of transformer isolation power conversion circuit, the second end and transformation
The second output end connection of device isolation power conversion circuit.
According to the another aspect of the embodiment of the present disclosure, there is provided a kind of air-conditioning electric power system, including above-mentioned solar energy are straight
Current converter, the first solar panel, the second solar panel and air-conditioner set, wherein, the first solar panel,
Second solar panel is powered by solar DC converter for air-conditioner set.
It is powered according to the another aspect of the embodiment of the present disclosure there is provided one kind by above-mentioned solar DC converter
Method for controlling power supply, control first respectively by the first solar energy output control circuit, the second solar energy output control circuit
The output break-make of solar panel, the second solar panel, to realize the first solar panel, the second solar cell
Plate timesharing is powered to load.
Further, to carrying out independent maximum in the first solar panel, the second solar panel power supply process
Powerinjected method is controlled.
When in the present invention, for different voltage solar battery group power supply controls, the first solar energy is set to export
Circuit and the second solar energy output control circuit are controlled, the Time-sharing control of different voltage solar battery groups is realized, meanwhile, pass through
Input output end respectively with the first solar energy output control circuit and the output of the second solar energy output control circuit are set
The transformer isolation power conversion circuit of connection is held, a transformer is completed and realizes the defeated of two different voltage solar battery groups
Enter, the solar DC converter of this structure efficiently solve when multiple solar panels are powered in the prior art, it is necessary to
Correspond to the solar battery power of multi input respectively using multiple power inverters, the problem of cost is higher reduces solar-electricity
The equipment cost of source input.
Brief description of the drawings
Fig. 1 is a kind of optional structured flowchart of solar DC converter according to embodiments of the present invention；
Fig. 2 is a kind of optional circuit structure diagram of solar DC converter according to embodiments of the present invention；
Fig. 3 is another optional circuit structure diagram of solar DC converter according to embodiments of the present invention；And
Fig. 4 is a kind of optional structured flowchart of air-conditioning electric power system according to embodiments of the present invention.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the present invention.
Embodiment 1
The solar DC converter that the present invention is provided is illustrated below in conjunction with the accompanying drawings.
Fig. 1 shows a kind of optional structured flowchart of solar DC converter, as shown in figure 1, the solar DC becomes
Parallel operation includes following part：
First solar energy output control circuit 101, input is connected with the output end of the first solar panel 10, is used for
Control the output of the first solar panel 10；
Second solar energy output control circuit 102, input is connected with the output end of the second solar panel 11, is used for
Control the output of the second solar panel 11；
Transformer isolation power conversion circuit 103, the output end of input respectively with the first solar energy output control circuit
Connected with the output end of the second solar energy output control circuit, output end is used to be connected with load, to be powered for load 20.
In the above-described embodiment, for different voltage solar battery groups (the first solar panel 10, second
Solar panel 11) power supply control when, set the first solar energy output control circuit 101 and the second solar energy output control electricity
Road 102, to the Time-sharing control of different voltage solar battery groups, also, by setting input defeated with the first solar energy respectively
Go out to control the transformer isolation power of the output end of circuit 101 and the output end connection of the second solar energy output control circuit 102
Translation circuit 103, it is the input that two different voltage solar battery groups can be achieved to complete a transformer, and this structure is too
Positive energy DC converter is efficiently solved when multiple solar panels are powered in the prior art, it is necessary to using multiple power conversions
Device corresponds to the solar battery power of multi input, the problem of cost is higher, the equipment cost of reduction sun-generated electric power input respectively.
The circuit structure of above-mentioned solar DC converter is specifically described with reference to Fig. 2 and Fig. 3：
Fig. 2 shows a kind of optional circuit connection diagram of above-mentioned solar DC converter, is illustrated in figure 2 including S11
With the power supply plan of S21 totally two solar panels, specific when setting circuit, the first above-mentioned solar energy output control circuit
101 as shown in Fig. 2 including：
First diode D12, positive pole is connected with the first solar panel S11 positive pole, and the first end of negative pole passes through
One absorption circuit is connected with transformer circuit first input end, and the end of negative pole second is connected with the input of transformer second, wherein, it is excellent
Selection of land, above-mentioned first absorption circuit includes：First resistor R11, first end is connected with the first diode D12 negative pole；First electricity
Hold C11, first end is connected with first resistor R11 first end and the first diode D12 negative pole respectively, the second end and the first electricity
Hinder R11 the second end connection, the 7th diode D11, negative pole respectively with first resistor R11 the second end and the first electric capacity C11
Second end is connected；Positive pole drain electrode respectively with the first metal-oxide-semiconductor MOS11 and transformer circuit first input end are connected.First suction
Withdrawing road is used for the voltage stress that leakage inductance is produced in suppression circuit；
First metal-oxide-semiconductor MOS11, drain electrode is connected with transformer circuit first input end, source electrode and the first solar panel
S11 negative pole connection, for controlling the first solar panel S11 whether to power.
Above-mentioned the second solar energy output control circuit 102 as shown in Fig. 2 including：
Second diode D22, positive pole is connected with the second solar panel S21 positive pole, and the first end of negative pole passes through
Two absorption circuits are connected with the input of transformer circuit second, and the end of negative pole second is connected with transformer first input end, wherein, it is excellent
Selection of land, the second absorption circuit includes：Second resistance R21, first end is connected with the second diode D22 negative pole；Second electric capacity
C21, first end is connected with second resistance R21 first end and the second diode D22 negative pole respectively, the second end and second resistance
R21 the second end connection；8th diode D21, negative pole respectively with second resistance R21 the second end and the second electric capacity C21
Two ends are connected；Positive pole drain electrode respectively with the second metal-oxide-semiconductor MOS21 and the input of transformer circuit second are connected.Second absorbs back
Road is used for the voltage stress that leakage inductance is produced in suppression circuit；
Second metal-oxide-semiconductor MOS21, drain electrode is connected with the input of transformer circuit second, source electrode and the second solar panel
S21 negative pole connection, for controlling the second solar panel whether to power.
Above-mentioned transformer isolation power conversion circuit as shown in Fig. 2 including：
3rd diode D31, the 4th diode D32, the 5th diode D33, the bridge rectifier of the 6th diode D34 compositions
Circuit, wherein, the 3rd diode D31 positive pole is connected with the output end of transformer second, negative pole and the 4th diode D32 negative pole
Connection；4th diode D32 positive pole is connected with the 6th diode D34 negative pole, and is connected to the output end of transformer first；The
Five diode D33 negative pole is connected with the 3rd diode D31 positive pole, and positive pole is connected with the 6th diode D34 positive pole, and even
It is connected to the second output end of transformer isolation power conversion circuit；
First inductance L31, first end is connected with the 3rd diode D31 and the 4th diode D32 negative pole, and the second end is with becoming
The first output end connection of depressor isolation power conversion circuit；
3rd electric capacity C31, first end is connected with the first output end of transformer isolation power conversion circuit, and the second end is with becoming
The second output end connection of depressor isolation power conversion circuit.
DC converter shown in Fig. 2 is dual input isolated DC transducer, and two input power pipes are led using timesharing
Logical mode.In order to suppress the voltage stress of leakage inductance generation, two transformer input primary sides are all provided with absorbing circuit.In system
When busbar voltage is higher, transformer secondary output winding uses bridge type topology.
When power tube MOS11 is turned in Fig. 2, solar cell S11 energy by primary side winding NP1, magnetic core, secondary around
Group NS and commutation diode D31, D34, inductance L31 are transferred to load RL.Although another power input winding NP2 has induced electricity
Pressure, but due to there was only absorption circuit loop all the way, power output is not produced substantially.
When power tube MOS11 is turned off, afterflow of the magnetization energy in magnetic core, the energy in leakage inductance and secondary inductance etc. because
There is a dynamic process in element, the turn on process of afterflow diode etc..With the end of this process, converter enters secondary electricity
Feel freewheeling period.Hereafter the power tube MOS21 conductings of another road winding circuit, its process is as hereinbefore.
According to the continuity of secondary inductor current, this converter mode of operation can be divided into inductive current discontinuous mode DCM,
Inductor current continuous mode CCM and critical conduction mode CRM.In order to avoid phase of the two-way input power in transformer magnetic field
Each input power time-sharing work, secondary are used in the difficulty that mutual coupling and magnetic reset problem are brought to convertor controls, scheme
The discontinuous DCM of inductive current working method, i.e. secondary inductance freewheel current has descended to zero before power tube conducting
(wherein it is preferred to, it can detect zero) whether secondary inductor current value be by current measuring element before conducting.
On the premise of the discontinuous DCM of inductive current or critical conduction, according to the solar panel power supply electricity detected
Pressure and corresponding electric current can obtain the power output of solar panel, when being controlled, can pass through dynamic control power
The dutycycle of pipe makes the power output of solar panel maintain maximum all the time, specifically, it is preferable that with a time
Section is unit, and power tube dutycycle is identical within the time period, detects the average current and voltage of solar panel, obtains work(
Rate.When this power was less than the power of a upper period, the dutycycle of power tube is transferred to the dutycycle of a period.When this work(
When rate is more than upper period power, when the dutycycle of power tube is further added by or reduced certain open by the variation tendency of the last period
Between section.Thus back and forth realize that the power output of solar panel, all the time in peak, realizes maximal power tracing MPPT.
Fig. 3 shows another optional circuit connection diagram of above-mentioned solar DC converter, be illustrated in figure 3 including
The power supply plan of S11 and S21 totally two solar panels, herein it should be noted that comparing Fig. 2 and Fig. 3 for convenience, portion
Point component label is identical, in actual setting, in Fig. 2 and Fig. 3 label identical component value can with it is identical can not also
Together.It is specific when circuit is set, above-mentioned the first solar energy output control circuit 101 as shown in figure 3, including：
First diode D12, positive pole is connected with the first solar panel S11 positive pole, and the first end of negative pole passes through
One absorption circuit is connected with transformer circuit first input end, and the end of negative pole second is connected with the input of transformer second, wherein, it is excellent
Selection of land, above-mentioned first absorption circuit includes：First resistor R11, first end is connected with the first diode D12 negative pole；First electricity
Hold C11, first end is connected with first resistor R11 first end and the first diode D12 negative pole respectively, the second end and the first electricity
Hinder R11 the second end connection, the 7th diode D11, negative pole respectively with first resistor R11 the second end and the first electric capacity C11
Second end is connected；Positive pole drain electrode respectively with the first metal-oxide-semiconductor MOS11 and transformer circuit first input end are connected.First suction
Withdrawing road is used for the voltage stress that leakage inductance is produced in suppression circuit；
First metal-oxide-semiconductor MOS11, drain electrode is connected with transformer circuit first input end, source electrode and the first solar panel
S11 negative pole connection, for controlling the first solar panel S11 whether to power.
Above-mentioned the second solar energy output control circuit 102 as shown in figure 3, including：
Second diode D22, positive pole is connected with the second solar panel S21 positive pole, and the first end of negative pole passes through
Two absorption circuits are connected with the input of transformer circuit second, and the end of negative pole second is connected with transformer first input end, wherein, it is excellent
Selection of land, the second absorption circuit includes：Second resistance R21, first end is connected with the second diode D22 negative pole；Second electric capacity
C21, first end is connected with second resistance R21 first end and the second diode D22 negative pole respectively, the second end and second resistance
R21 the second end connection；8th diode D21, negative pole respectively with second resistance R21 the second end and the second electric capacity C21
Two ends are connected；Positive pole drain electrode respectively with the second metal-oxide-semiconductor MOS21 and the input of transformer circuit second are connected.Second absorbs back
Road is used for the voltage stress that leakage inductance is produced in suppression circuit；
Second metal-oxide-semiconductor MOS21, drain electrode is connected with the input of transformer circuit second, source electrode and the second solar panel
S21 negative pole connection, for controlling the second solar panel whether to power.
Above-mentioned transformer isolation power conversion circuit as shown in figure 3, including：
9th diode D31, negative pole is connected with the output end of transformer second, positive pole and transformer isolation power conversion circuit
The second output end；
Tenth diode D32, positive pole is connected with the 9th diode D31 positive pole, and is connected to the change of transformer isolation power
The second output end of circuit is changed, negative pole is connected with the output end of transformer first；
Second inductance L31, negative pole of the first end respectively with the output end of transformer second and the 9th diode D31 is connected, the
Two ends and the first output end of transformer isolation power conversion circuit；
3rd inductance L32, first end is connected with the tenth diode D32 negative poles and the output end of transformer first respectively, and second
End is connected with the second inductance L31 the second end；
4th electric capacity C31, first end is connected with the first output end of transformer isolation power conversion circuit, and the second end is with becoming
The second output end connection of depressor isolation power conversion circuit.
In circuit structure shown in Fig. 3, transformer primary side component is identical with Fig. 2, and secondary structure is differed, Fig. 2 lose-lose
Enter isolated DC transducer mainly for output voltage it is higher in the case of use, the conversion of Fig. 3 dual input isolated DC
Device mainly for output current it is larger in the case of use.
Can be using scheme topology as shown in Figure 3 when secondary output current is larger.In Fig. 3, high frequency transformer primary side
Circuit topology is identical with Fig. 2, and secondary side topology is by the way of two secondary inductances, and this mode can realize that primary side accordingly turns on work(
The electric current of rate pipe halves.In control or using inductive current discontinuous conduction mode (wherein, power tube MOS11 conducting pair
Should be in secondary inductance L31 discontinuous conducting, power tube MOS21 conducting corresponds to secondary inductance L32 discontinuous conducting).
The control of remaining maximal power tracing is identical with Fig. 2, and here is omitted.
When in the above-described embodiments, for different voltage solar battery group power supply controls, the first solar energy is set
Output control circuit and the second solar energy output control circuit, realize the Time-sharing control of different voltage solar battery groups, meanwhile,
By set input respectively with the output end of the first solar energy output control circuit and the second solar energy output control circuit
The transformer isolation power conversion circuit of output end connection, completes a transformer and realizes two different voltage solar battery groups
Input, when the solar DC converter of this structure efficiently solves that multiple solar panels are powered in the prior art,
The solar battery power for using multiple power inverters to correspond to multi input respectively is needed, the problem of cost is higher reduces the sun
The equipment cost of energy power input.
Embodiment 2
Based on the solar DC converter provided in above-described embodiment 1, optional embodiment 2 of the present invention additionally provides one
Air-conditioning electric power system is planted, specifically, Fig. 4 shows a kind of optional structured flowchart of the air-conditioning electric power system, as shown in figure 4,
The air-conditioning electric power system includes：Solar DC converter 40, the first solar panel 10, the second solar panel 11 with
And air-conditioner set 41, the first solar panel 10, the second solar panel 11 are sky by solar DC converter 40
Unit 42 is adjusted to power.Wherein, solar DC transformer configuration is as described in above-mentioned embodiment 1, and here is omitted.
Because the different caused output voltages of solar panel putting position are different, therefore in parallel it can not give air-conditioning system
Power supply, it is necessary to which separately power supply, common solar converter handles two groups of solar panels using two power inverters, this
The power supply of two Battery pack plates is realized using a power inverter in embodiment.And two realize isolation between Battery pack plate and subtract
Lack and interfered, it is favourable to electromagnetic compatibility.And a transformer realizes the solar panel input saving of two groups of isolation
Cost.
Embodiment 3
Based on the solar DC converter provided in above-described embodiment 1, optional embodiment 3 of the present invention additionally provides one
The method for controlling power supply being powered by solar DC converter is planted, wherein, solar DC transformer configuration is as described above
Described in embodiment 1, here is omitted.In the control being powered by solar DC converter, pass through first
Solar energy output control circuit, the second solar energy output control circuit control the first solar panel, the second solar energy respectively
The output break-make of cell panel, to realize that the first solar panel, the second solar panel timesharing are powered to load.
In addition, to carrying out independent peak power in the first solar panel, the second solar panel power supply process
Tracing Control.Specifically, on the premise of the discontinuous DCM of inductive current or critical conduction, according to the solar cell detected
Plate supply voltage and corresponding electric current can obtain the power output of solar panel, when being controlled, and can pass through dynamic
The dutycycle of control power tube makes the power output of solar panel maintain maximum all the time, specifically, it is preferable that with
One period is unit, and power tube dutycycle is identical within the time period, detects the average current and electricity of solar panel
Pressure, obtains power.When this power was less than the power of a upper period, the dutycycle of power tube is transferred to the duty of a period
Than.When this power is more than upper period power, the dutycycle of power tube is further added by or reduced by the variation tendency of the last period
Certain service time section.Thus back and forth realize the power output of solar panel all the time in peak, realize peak power with
Track MPPT.
It can be seen from the foregoing description that in the embodiment that the present invention is provided, for different voltage solar-electricities
During the group power supply control of pond, the first solar energy output control circuit and the second solar energy output control circuit are set, different electricity are realized
The Time-sharing control of solar battery group is pressed, meanwhile, by setting input defeated with the first solar energy output control circuit respectively
Go out the transformer isolation power conversion circuit of the output end connection of end and the second solar energy output control circuit, complete a transformation
Device realizes the input of two different voltage solar battery groups, and the solar DC converter of this structure efficiently solves existing
, it is necessary to correspond to the solar cell of multi input respectively using multiple power inverters when multiple solar panels are powered in technology
Power supply, the problem of cost is higher, the equipment cost of reduction sun-generated electric power input.
Those skilled in the art will readily occur to its of the present invention after considering specification and putting into practice invention disclosed herein
Its embodiment.The application be intended to the present invention any modification, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and the common knowledge in the art do not invented including the present invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (10)
1. a kind of solar DC converter, it is characterised in that including：
First solar energy output control circuit, input is connected with the output end of the first solar panel, described for controlling
The output of first solar panel；
Second solar energy output control circuit, input is connected with the output end of the second solar panel, described for controlling
The output of second solar panel；
Transformer isolation power conversion circuit, input output end respectively with the first solar energy output control circuit and institute
The output end connection of the second solar energy output control circuit is stated, output end is used to be connected with load, to for load supplying.
2. solar DC converter according to claim 1, it is characterised in that the first solar energy output control electricity
Road includes：
First diode, positive pole is connected with the positive pole of first solar panel, and the first end of negative pole absorbs by first
Loop is connected with the transformer circuit first input end, and the end of negative pole second is connected with the input of transformer second, wherein,
First absorption circuit is used for the voltage stress that leakage inductance is produced in suppression circuit；
First metal-oxide-semiconductor, drain electrode is connected with the transformer circuit first input end, source electrode and first solar panel
Negative pole is connected, for controlling first solar panel whether to power.
3. solar DC converter according to claim 2, it is characterised in that first absorption circuit includes：
First resistor, first end is connected with the negative pole of first diode；
First electric capacity, first end is connected with the first end of the first resistor and the negative pole of first diode respectively, and second
End is connected with the second end of the first resistor；
7th diode, negative pole is connected with the second end of the first resistor and the second end of first electric capacity respectively；Positive pole
Drain electrode and the transformer circuit first input end respectively with first metal-oxide-semiconductor is connected.
4. solar DC converter according to claim 3, it is characterised in that the second solar energy output control electricity
Road includes：
Second diode, positive pole is connected with the positive pole of second solar panel, and the first end of negative pole absorbs by second
Loop is connected with the input of transformer circuit second, and the end of negative pole second is connected with the transformer first input end, wherein,
Second absorption circuit is used for the voltage stress that leakage inductance is produced in suppression circuit；
Second metal-oxide-semiconductor, drain electrode is connected with the input of transformer circuit second, source electrode and second solar panel
Negative pole is connected, for controlling second solar panel whether to power.
5. solar DC converter according to claim 4, it is characterised in that second absorption circuit includes：
Second resistance, first end is connected with the negative pole of second diode；
Second electric capacity, first end is connected with the first end of the second resistance and the negative pole of second diode respectively, and second
End is connected with the second end of the second resistance；
8th diode, negative pole is connected with the second end of the second resistance and the second end of second electric capacity respectively；Positive pole
Drain electrode and the input of the transformer circuit second respectively with second metal-oxide-semiconductor is connected.
6. the solar DC converter according to any one of claim 1 to 5, it is characterised in that the transformer isolation
Power conversion circuit includes：
3rd diode, the 4th diode, the 5th diode, the bridge rectifier of the 6th diode composition, wherein, described the
The positive pole of three diodes is connected with the output end of transformer second, and negative pole is connected with the negative pole of the 4th diode；It is described
The positive pole of 4th diode is connected with the negative pole of the 6th diode, and is connected to the output end of transformer first；It is described
The negative pole of 5th diode is connected with the positive pole of the 3rd diode, and positive pole is connected with the positive pole of the 6th diode, and
It is connected to the second output end of the transformer isolation power conversion circuit；
First inductance, first end is connected with the negative pole of the 3rd diode and the 4th diode, and the second end becomes with described
The first output end connection of depressor isolation power conversion circuit；
3rd electric capacity, first end is connected with the first output end of the transformer isolation power conversion circuit, the second end with it is described
The second output end connection of transformer isolation power conversion circuit.
7. the solar DC converter according to any one of claim 1 to 5, it is characterised in that the transformer isolation
Power conversion circuit includes：
9th diode, negative pole is connected with the output end of transformer second, positive pole and transformer isolation power conversion electricity
Second output end on road；
Tenth diode, positive pole is connected with the positive pole of the 9th diode, and is connected to the transformer isolation power conversion
Second output end of circuit, negative pole is connected with the output end of transformer first；
Second inductance, negative pole of the first end respectively with the output end of transformer second and the 9th diode is connected, and second
End and the first output end of the transformer isolation power conversion circuit；
3rd inductance, first end is connected with the tenth diode cathode and the output end of the transformer first respectively, the second end
It is connected with the second end of second inductance；
4th electric capacity, first end is connected with the first output end of the transformer isolation power conversion circuit, the second end with it is described
The second output end connection of transformer isolation power conversion circuit.
8. a kind of air-conditioning electric power system, it is characterised in that including the solar DC conversion as described in claim any one of 1-7
Device, the first solar panel, the second solar panel and air-conditioner set, wherein, first solar panel,
Two solar panels are that the air-conditioner set is powered by the solar DC converter.
9. a kind of method for controlling power supply being powered by any one of the claim 1-7 solar DC converters, its
It is characterised by,
Described first is controlled respectively by the first solar energy output control circuit, the second solar energy output control circuit
The output break-make of solar panel, second solar panel, to realize first solar panel, described
Two solar panel timesharing are powered to load.
10. method according to claim 9, it is characterised in that also include：
Chased after to carrying out independent peak power in first solar panel, the second solar panel power supply process
Track is controlled.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710283421.3A CN107086788A (en) | 2017-04-26 | 2017-04-26 | Solar DC converter, method for controlling power supply, air-conditioning electric power system |
| PCT/CN2017/118111 WO2018196415A1 (en) | 2017-04-26 | 2017-12-22 | Solar dc converter, power supply control method, and air conditioner power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710283421.3A CN107086788A (en) | 2017-04-26 | 2017-04-26 | Solar DC converter, method for controlling power supply, air-conditioning electric power system |
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| CN107086788A true CN107086788A (en) | 2017-08-22 |
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| WO (1) | WO2018196415A1 (en) |
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| WO2018196415A1 (en) | 2018-11-01 |
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Application publication date: 20170822 |