CN103872939B - A kind of two-way booster circuit inverter system and control method thereof - Google Patents
A kind of two-way booster circuit inverter system and control method thereof Download PDFInfo
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- CN103872939B CN103872939B CN201210552822.1A CN201210552822A CN103872939B CN 103872939 B CN103872939 B CN 103872939B CN 201210552822 A CN201210552822 A CN 201210552822A CN 103872939 B CN103872939 B CN 103872939B
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Abstract
The present invention proposes a kind of two-way booster circuit inverter system and control method thereof, this two-way booster circuit inverter system includes boost module, inversion module and control module, inversion module calculates the initial nominal power of boost module, first power-sensing circuit detects the actual power of the first booster circuit, second power-sensing circuit detects the actual power of the second booster circuit, and control module adjusts the size of its rated power according to the actual power size of two-way booster circuit.The two-way booster circuit inverter system of the present invention dynamically actual power size according to two-way booster circuit adjusts the size of its rated power.The control method of the present invention is by revising the rated power of two booster circuits, when the actual power of another road booster circuit is less than its rated power equal to its rated power for an actual power road booster circuit occur, carry out the assignment again of rated power, make booster circuit be able to receive that more actual power, improve the electricity being dealt on electrical network.
Description
Technical field
The present invention relates to technical field of circuit design, two can be changed dynamically particularly to one and rise piezoelectricity
The two-way booster circuit inverter system of the rated power on road and control method thereof.
Background technology
Along with the adjustment of energy resource structure, people gradually transfer to sight on new forms of energy, especially European Countries,
Having benefited from the Europe preferential policy to new forms of energy development, photovoltaic inversion industry presents the flourish impetus.Respectively
Important photovoltaic inversion manufacturer, while selling product, notices the unique environments of locality especially, with
As a example by Germany, mostly German is in units of single family to live in an only house, and top, house with
Middle high two ends are low in the majority, based on this reason, when installing solar panel, all pacify in the both sides on roof
Having filled solar panel, it is contemplated that above-mentioned factor, some main photovoltaic manufacturers devise has two-way boosting
The inverter of circuit.
As it is shown in figure 1, existing two-way booster circuit inverter design has a two-way booster circuit, respectively
One booster circuit 11 and the second booster circuit 12, as can be seen from Figure 1 the first booster circuit 11 and second
Booster circuit 12 is all connected in parallel on the 3rd electric capacity C3, and this be just independent control the first booster circuit 11 and the
Two booster circuits 12 provide condition, simultaneously the first booster circuit 11 and input of the second booster circuit 12
End is connected with DC source PV1, PV2 respectively, and DC source PV1, PV2 here are by solar energy
Panel provides.The existing control method to this two-way booster circuit, takes inverter direct-flow side
Power be divided into two, and will point after performance number as the first booster circuit 11 and the second booster circuit 12
Rated power, this rated power is not with the size variation of actual power, thus two-way booster circuit
Use.
But, use the control method of this two-way booster circuit, can not sufficiently utilize photovoltaic panel to produce
Raw energy, this is because this control method does not accounts for the characteristic of photovoltaic panel, photovoltaic panel produces
Energy be as the enhancing of intensity of illumination and increase, be under the photovoltaic panel reality of both sides, roof
The intensity of illumination received differs, and this actual power resulting in arrival two-way booster circuit is also not
With, and the method for existing control two-way boosting is to compose identical rated power to two-way booster circuit, and
And this rated power is changeless, the actual power of side the most likely can be caused to reach specified merit
Rate, but due to the restriction of rated power so that actual power can not raise again；And opposite side actual power reaches
Less than rated power, even actual power is mutually far short of what is expected with rated power, so, has resulted in generation more
The ability of power, but incorrect due to rated power distribution, and the phenomenon that this portion of energy has been slatterned
Appearance.After this situation occurs, for user, while waste energy, also reduce photovoltaic generation
The economic worth brought.
Summary of the invention
It is contemplated that at least solve technical problem present in prior art, the most innovatively propose one
Two-way booster circuit inverter system and control method thereof.
In order to realize the above-mentioned purpose of the present invention, according to the first aspect of the invention, the invention provides one
Plant two-way booster circuit inverter system, including: boost module, inversion module and control module, described liter
The outfan of die block is connected with described inversion module in parallel and the 3rd electric capacity, and described inversion module is used for will
The unidirectional current of input is transformed into alternating current and calculates the initial nominal power of described boost module；Described liter of pressing mold
Block includes the first booster circuit and the second booster circuit；The input of described first booster circuit and the first direct current
Power supply is connected, and described first booster circuit is also connected with the first power-sensing circuit, described first power detection
Circuit is for detecting the actual power of described first booster circuit；The input of described second booster circuit and
Two DC sources are connected, and described second booster circuit is also connected with the second power-sensing circuit, described second merit
Rate testing circuit is for detecting the actual power of described second booster circuit；Described control module and described boosting
Module and inversion module are respectively connected with, described control module according to the actual power of two-way booster circuit with specified
The size comparative result of power adjusts the size of the rated power of two-way booster circuit.
The two-way booster circuit inverter system of the present invention is dynamically according to the actual power of two-way booster circuit
Size adjust the size of its rated power, by the amendment of the rated power to two booster circuits so that
Booster circuit is able to receive that more actual power, and the electricity being dealt on electrical network is the most more.
In one preferred embodiment of the invention, described first booster circuit include the first inductance, the one or two
Pole pipe and an IGBT, the input of described first inductance is connected with the positive pole of described first DC source,
Described first diode is connected between outfan and the input of described inversion module of described first inductance,
A described IGBT is connected between outfan and the negative pole of the first DC source of described first inductance；Institute
State the second booster circuit and include the second inductance, the second diode and the 2nd IGBT, described second inductance defeated
Entering end to be connected with the positive pole of described second DC source, described second diode is connected to described second inductance
Between the input of outfan and described inversion module, described 2nd IGBT is connected to described second inductance
Between the negative pole of outfan and the second DC source.
First booster circuit of the present invention is when an IGBT conducting, and the 3rd electric capacity is charged by the first inductance,
After charging terminates, an IGBT cut-off.In like manner, the second booster circuit when the 2nd IGBT conducting, the
3rd electric capacity is charged by two inductance, after charging terminates, and the 2nd IGBT cut-off.By controlling an IGBT
Conducting with the 2nd IGBT and cut-off, the outfan of two-way booster circuit is all the 3rd electric capacity charging, finally
By the 3rd electric capacity, energy is passed to inversion module again.First diode and the second diode are used for preventing the 3rd electricity
Hold and discharge over the ground.
In one preferred embodiment of the invention, described first power-sensing circuit includes the first voltage sample
Circuit and the first current sampling circuit, described first voltage sampling circuit is in parallel with described first DC source,
Described first current sampling circuit is connected with the input of described first booster circuit.
In another preferred embodiment of the invention, described second power-sensing circuit includes that the second voltage is adopted
Sample circuit and the second current sampling circuit, described second voltage sampling circuit is with described second DC source also
Connection, described second current sampling circuit is connected with the input of described second booster circuit.
The first power detection that the present invention is consisted of the first voltage sampling circuit and the first current sampling circuit
The actual power of the first booster circuit is detected by circuit；By the second voltage sampling circuit and the second electric current
The actual power of the second booster circuit is detected by the second power-sensing circuit that sample circuit is constituted.This
Detection simple in construction, convenient to operate.
In one preferred embodiment of the invention, the first electric capacity and the second electric capacity, described first electricity are also included
Holding in parallel with described first DC source, described second electric capacity is in parallel with described second DC source.
The present invention uses the first electric capacity and the second electric capacity to be filtered, and improves the first DC source and the second direct current
The flatness of mains input current.
In another preferred embodiment of the invention, tertiary voltage testing circuit, described 3rd electricity are also included
Pressure testing circuit is in parallel with described inversion module.
The present invention gathers the d. c. voltage signal of inversion module input by tertiary voltage testing circuit, is used for
Inversion module is carried out DC input voitage abnormal protection and inversion control.
In order to realize the above-mentioned purpose of the present invention, according to the first aspect of the invention, the invention provides one
Plant two-way booster circuit inverter system control method, comprise the steps:
S1: be respectively provided with the first booster circuit and the rated power of the second booster circuit；
S2: detect the first booster circuit and the actual power of the second booster circuit respectively；
S3: the actual power of each booster circuit is compared with its rated power, according to actual power
Size adjust rated power size, at rated power and the volume of the second booster circuit of the first booster circuit
Determine power sum keep constant in the case of, make the rated power of each booster circuit be all higher than its actual merit
Rate；
S4: return step S2, until two-way booster circuit inverter quits work, exit.
The two-way booster circuit inverter system control method of the present invention is by revising the volume of two booster circuits
Determine power, it is ensured that system the actual power of a road booster circuit is occurring equal to its rated power and another road liter
The when that the actual power of volt circuit being less than its rated power, carry out the assignment again of rated power so that rise
Volt circuit is able to receive that more actual power, improves the electricity being dealt on electrical network.
In one preferred embodiment of the invention, the rated power in described step S1 is initial nominal merit
Rate, the setting steps of described initial nominal power is:
S11: calculate the power of the DC side of inversion module；
S12: the power of inversion module DC side is halved；
S13: the inversion module DC side power after halving is respectively set to the initial volume of the first booster circuit
Determine the initial nominal power of power and the second booster circuit.
Inversion module DC side power, when inversion module is in original state, is halved and is set to by the present invention
The initial nominal power of the first booster circuit and the second booster circuit, this set method is simple, it is easy to accomplish.
In another preferred embodiment of the invention, in described step S2, by the first power detection
The actual power of the first booster circuit described in electric circuit inspection, by the second power-sensing circuit detection described second
The actual power of booster circuit.
In the still another preferable embodiment of the present invention, described step S3 comprises the steps:
S31: the size of the actual power of each booster circuit is compared with the size of its rated power；
S32: judge whether that the actual power meeting the first booster circuit is equal to its rated power, and second liter
The actual power value of volt circuit is less than its rated power；
S33: if the actual power of the first booster circuit is equal to its rated power, and the second booster circuit
Actual power value is less than its rated power, then make the rated power of the first booster circuit
P1=[p1+ ((p2-P2)/2)], the rated power p2=[p2-((p2-P2)/2)] of the second booster circuit, and
Return step S32, otherwise perform step S34, wherein, the rated power of p1 the first booster circuit, p2
Being the rated power of the second booster circuit, P1 is the actual power of the first booster circuit, and P2 is the second boosting
The actual power of circuit；
S34: judge whether that the actual power value meeting the second booster circuit is equal to its rated power, and first
The actual power value of booster circuit is less than its rated power；
S35: if the actual power value of the second booster circuit is equal to its rated power, and the first booster circuit
Actual power value less than its rated power, then make the rated power of the second booster circuit
P2=[p2+ ((p1-P1)/2)], first gives the power-handling capability p1=[p1-((p1-P1)/2)] of booster circuit,
And return step S32, otherwise perform step S36；
S36: the rated power of two-way booster circuit is not modified, exit.
The present invention is composing again to the rated power of the first booster circuit and the rated power of the second booster circuit
Value, has the process taking half value, it is possible to prevent two-way booster circuit inverter from frequently changing rated power.
The additional aspect of the present invention and advantage will part be given in the following description, and part will be retouched from following
Become obvious in stating, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment
Will be apparent from easy to understand, wherein:
Fig. 1 is the structural representation of two-way booster circuit inverter system in the prior art；.
Fig. 2 is preferably to execute the structural representation of two-way booster circuit inverter system in mode the present invention is a kind of
Figure；
Fig. 3 is the circuit diagram of two-way booster circuit inverter system shown in Fig. 2 of the present invention；
Fig. 4 is the flow chart of two-way booster circuit inverter system control method of the present invention；
Fig. 5 is the flow chart arranging initial nominal power in a kind of preferred embodiment of the present invention；
Fig. 6 is the flow chart detecting actual power value in a kind of preferred embodiment of the present invention；
Fig. 7 is the flow chart in a kind of preferred embodiment of the present invention being adjusted rated power.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, wherein certainly
Begin to same or similar label eventually represent same or similar element or there is the unit of same or like function
Part.The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining the present invention, and can not
It is interpreted as limitation of the present invention.
In describing the invention, it is to be understood that term " longitudinally ", " laterally ", " on ", D score,
"front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " etc. refer to
The orientation shown or position relationship, for based on orientation shown in the drawings or position relationship, are for only for ease of description originally
Invention and simplifying describes rather than instruction or the hint device of indication or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
In describing the invention, unless otherwise prescribed and limit, it should be noted that term " is installed ",
" be connected ", " connection " should be interpreted broadly, for example, it may be mechanically connected or electrical connection, it is also possible to be
The connection of two element internals, can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, for
For those of ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
The invention provides a kind of two-way booster circuit inverter system, as in figure 2 it is shown, this two-way rises piezoelectricity
Road inverter system includes boost module 1, inversion module 2 and control module, wherein, boost module 1
Outfan is connected with inversion module 2 and the 3rd electric capacity C3 in parallel.This boost module 1 includes that two-way boosts
Circuit, the i.e. first booster circuit 11 and the second booster circuit 12, outfan of this first booster circuit 11
All in parallel with the 3rd electric capacity C3 with the outfan of the second booster circuit 12, this is just individually to control the first boosting
Circuit 11 and the second booster circuit 12 provide condition.
In the present embodiment, the input of the first booster circuit 11 and the first DC source PV1 are connected,
First booster circuit 11 is also connected with the first power-sensing circuit, and the first power-sensing circuit is for detection the
The actual power of one booster circuit 11.The input of the second booster circuit 12 and the second DC source PV2
Being connected, the second booster circuit 12 is also connected with the second power-sensing circuit, and the second power-sensing circuit is used for
Detect the actual power of described second booster circuit 12.It should be noted that actual power in the present invention
Refer to the input of the first booster circuit 11 and the actual power of the input of the second booster circuit 12.
In the present embodiment, this first DC source PV1 and the second DC source PV2 can be any energy
Enough DC sources outwardly powered, are specifically as follows but are not limited to the unidirectional current provided by solar panel
Source.In an implementation more preferably of the present invention, the first DC source PV1 and the second unidirectional current
Source PV2 is provided respectively by the two groups of solar panels being arranged in both sides, roof, and i.e. one group solar panel provides
First DC source PV1, another group solar panel provides the second DC source PV2, these two groups of solar energys
Polylith solar panel in panel can be combined by the way of serial or parallel connection.These two groups of sun
Electric current and voltage can be produced by panel, after the booster circuit boosting being respectively connected with them, by inversion mould
The unidirectional current of input is transformed into alternating current by block 2, and is exported by alternating current to electrical network, this inversion module 2
It is additionally operable to calculate the initial nominal power of the two-way booster circuit of boost module 1.
In the present embodiment, control module (not shown in FIG.) and boost module 1 and inversion module 2
It is respectively connected with, after this control module receives initial nominal power and the actual power of two-way booster circuit, according to
The actual power size of two-way booster circuit adjusts the size of its rated power, by two booster circuits
The amendment of rated power so that booster circuit is able to receive that more actual power, the electricity being dealt on electrical network is also
The most more.
As it is shown on figure 3, the first booster circuit 11 includes the first inductance L1, the first diode D1 and first
IGBT Q1, wherein, the input of the first inductance L1 and the positive pole of the first DC source PV1 are connected, and first
Diode D1 is connected between outfan and the input of inversion module 2 of the first inductance L1, an IGBT
Q1 is connected between the outfan of the first inductance L1 and the negative pole of the first DC source PV1, and specifically first
The drain electrode of IGBT Q1 is connected with the outfan of the first inductance L1, the source electrode of an IGBT Q1 and first straight
The negative pole of stream power supply PV1 is connected, the grid of an IGBT Q1 and the first clock signal (not shown in FIG.)
It is connected, is controlled conducting and the cut-off of an IGBT Q1 by the first clock signal, thus realize the first inductance
3rd electric capacity C3 is charged by L1.Second booster circuit 12 includes the second inductance L2, the second diode D2
It is connected with the input of the 2nd IGBT Q2, the second inductance L2 and the positive pole of the second DC source PV2, the
Two diode D2 are connected between outfan and the input of inversion module 2 of described second inductance L2, the
Two IGBT Q2 are connected between the outfan of the second inductance L2 and the negative pole of the second DC source PV2, tool
Body is that the drain electrode of the 2nd IGBT Q2 is connected with the outfan of the second inductance L2, the source electrode of the 2nd IGBT Q2
Being connected with the negative pole of the first DC source PV1, the grid of the 2nd IGBT Q2 and second clock signal are (in figure
It is shown without) it is connected, conducting and the cut-off of the 2nd IGBT Q2 is controlled by second clock signal, thus real
3rd electric capacity C3 is charged by existing second inductance L2.
First booster circuit 11 of the present invention and the second booster circuit 12 are respectively by controlling an IGBT Q1
Conducting with the 2nd IGBT Q2 and cut-off, the outfan of two-way booster circuit is all the 3rd electric capacity C3 charging,
Last by the 3rd electric capacity C3, energy passed to inversion module 2 the most again.This inversion module 2 is except will be a liter piezoelectricity
The unidirectional current that road is transmitted through is converted to outside alternating current supply electrical network, the inversion ability of inversion module 2 to be utilized
Calculating the dc power of the DC side of inversion module 2, the half value of this dc power will be as the first boosting
The initial nominal power of circuit 11 and the second booster circuit 12 uses.As it is shown on figure 3, this inversion module
2 include four IGBT, and wherein, the drain electrode of the 3rd IGBT Q3 and the drain electrode of the 5th IGBT Q5 are connected to one
Play one end of the input as inversion module 2, the source electrode of the 4th IGBT Q4 and the source of the 6th IGBT Q6
Pole is connected together as the other end of the input of inversion module 2, the source electrode and the 4th of the 3rd IGBT Q3
The drain electrode of IGBT Q4 is connected, and the source electrode of the 5th IGBT Q5 and the drain electrode of the 6th IGBT Q6 are connected.
Visible in conjunction with Fig. 2 and Fig. 3, first power-sensing circuit of the present invention includes the first voltage sampling circuit
V1 and the first current sampling circuit A1, this first voltage sampling circuit V1 and the first DC source PV1 are in parallel,
The input of the first current sampling circuit A1 and the first booster circuit 11 is connected.Second power-sensing circuit bag
Include the second voltage sampling circuit V2 and the second current sampling circuit A2, the second voltage sampling circuit V2 and institute
State the second DC source PV2 in parallel, the second current sampling circuit A2 and the input of the second booster circuit 12
It is connected.The first merit that the present invention is consisted of the first voltage sampling circuit V1 and the first current sampling circuit A1
The actual power of the first booster circuit 11 is detected by rate testing circuit；By the second voltage sampling circuit
The second power-sensing circuit that V2 and the second current sampling circuit A2 the is constituted reality to the second booster circuit 12
Border power detects.This detection simple in construction, convenient to operate.
In a kind of embodiment more preferably of the present invention, the first voltage sampling circuit V1 includes first
Sampling resistor (not shown) is straight to the input of the first booster circuit 11 by this first sampling resistor
Stream magnitude of voltage is sampled, and the first current sampling circuit A1 includes the first current sensor (not shown),
By this first current sensor, the input DC current values of the first booster circuit 11 is sampled, the
The signal collected is sent to control mould by one voltage sampling circuit V1 and the first current sampling circuit A1 respectively
Block, control module is calculated magnitude of voltage and the current value of the first booster circuit 11 reality.Second voltage is adopted
Sample circuit V2 includes the second sampling resistor (not shown), by this second sampling resistor to the second boosting
The input DC voltage value of circuit 12 is sampled, and the second current sampling circuit A2 includes that the second electric current passes
Sensor (not shown), by this second current sensor input direct current to the second booster circuit 12
Current value is sampled, and the second voltage sampling circuit V2 and the second current sampling circuit A2 will collect respectively
Signal be sent to control module, control module be calculated the second booster circuit 12 reality magnitude of voltage and
Current value.
.In the present embodiment, this two-way booster circuit inverter system also includes the first electric capacity C1 and
Two electric capacity C2, this first electric capacity C1 and the first DC source PV1 are in parallel, this second electric capacity C2 and second
DC source PV2 is in parallel.The present invention, by using the first electric capacity C1 and the second electric capacity C2 to be filtered, carries
High first DC source PV1 and the flatness of the second DC source PV2 input current.
In the preferred implementation that the present invention is other, this two-way booster circuit inverter system also includes the 3rd
Voltage detecting circuit V3, testing circuit V3 is in parallel with inversion module 2 for this tertiary voltage.By the 3rd electricity
Pressure testing circuit V3 gathers the d. c. voltage signal of inversion module input, it is achieved carry out inversion module directly
Stream input voltage abnormal protection and inversion control.
Present invention also offers a kind of two-way booster circuit inverter system control method, as shown in Figure 4, be somebody's turn to do
Control method comprises the steps:
Step S1, is respectively provided with the first booster circuit 11 and rated power of the second booster circuit 12；
Step S2, detects the first booster circuit 11 and actual power of the second booster circuit 12 respectively；
Step S3, compares the actual power of each booster circuit with its rated power, according to reality
The size of border power adjusts the size of rated power, the rated power of the first booster circuit 11 and second liter
The rated power sum of volt circuit 12 keep constant in the case of, make the rated power of each booster circuit
It is all higher than its actual power；
Step S4, returns step S2, until two-way booster circuit inverter quits work, exits.
The two-way booster circuit inverter system control method of the present invention is by revising the volume of two booster circuits
Determine power, it is ensured that system the actual power of a road booster circuit is occurring equal to its rated power and another road liter
The when that the actual power of volt circuit being less than its rated power, carry out the assignment again of rated power so that rise
Volt circuit is able to receive that more actual power, improves the electricity being dealt on electrical network, it is possible to obtain more
Economic benefit.
In the present embodiment, the rated power in step S1 is initial nominal power, as it is shown in figure 5,
The setting steps of initial nominal power is:
Step S11, control module calculates the power of the DC side of inversion module 2, and the power of this DC side is
The maximum dc power that the DC side of inversion module 2 can produce, in the present embodiment, concrete calculating
Formula is: the inversion ability/direct current of dc power=inversion module delivers the conversion ratio of stream.
Step S12, halves the power of the DC side of inversion module 2；
Step S13, the DC side power of the inversion module 2 after halving is respectively set to the first booster circuit
The initial nominal power of 11 and the initial nominal power of the second booster circuit 12.
In step s 2, detected the actual power of the first booster circuit 11 by the first power-sensing circuit,
The actual power of the second booster circuit 12 is detected by the second power-sensing circuit.As shown in Figure 6, at this
In embodiment, concrete detecting step is:
Step S21, by the first voltage sampling circuit V1 and first electricity of the first booster circuit 11 input
Stream sample circuit A1 detects the first booster circuit 11 input direct current signal, obtains the first booster circuit 11
DC voltage value and DC current values, and then obtain the actual power of the first booster circuit 11 input.
Step S22, by the second voltage sampling circuit V2 and second electricity of the second booster circuit 12 input
Stream sample circuit A2 detects the second booster circuit 12 input direct current signal, obtains the second booster circuit 12
DC voltage value and DC current values, and then obtain the actual power of the second booster circuit 12 input.
Step S23, the DC voltage value of calculated first booster circuit 11 in applying step S21,
DC current values, calculates input actual power P1. of the first booster circuit 11
Step S24, the DC voltage value of calculated second booster circuit 12 in applying step S22,
DC current values, calculates input actual power P2 of the second booster circuit 12.
In the present embodiment, as it is shown in fig. 7, step S3 comprises the steps:
Step S31, control module (such as CPU) obtain the rated power p1 of the first booster circuit 11,
Actual power P1 and second that the rated power p2 of two booster circuits 12, the first booster circuit 11 are current
Actual power P2 that booster circuit 12 is current, by the size of the actual power of each booster circuit and its volume
The size determining power compares.
Step S32, it may be judged whether the actual power meeting the first booster circuit 11 is equal to its rated power,
And second the actual power value of booster circuit 12 less than its rated power, i.e. meet expression formula
(P1==p1) && (P2 ＜ p2).
Step S33, if the actual power of the first booster circuit 11 is equal to its rated power, and second liter
The actual power value of volt circuit 12 is less than its rated power, then make the rated power of the first booster circuit 11
P1=[p1+ ((p2-P2)/2)], the rated power p2=[p2-((p2-P2)/2)] of the second booster circuit 12,
And return step S32, otherwise perform step S34.
Step S34, it may be judged whether the actual power meeting the second booster circuit 12 is equal to its rated power,
And first the actual power value of booster circuit 11 less than its rated power, i.e. meet expression formula
(P2==p2) && (P1 ＜ p1).
Step S35, if the actual power value of the second booster circuit 12 is equal to its rated power, and first
The actual power value of booster circuit 11 is less than its rated power, then make the rated power of the second booster circuit 12
P2=[p2+ ((p1-P1)/2)], first gives the power-handling capability p1=[p1-((p1-P1)/2)] of booster circuit,
And return step S32, otherwise perform step S36.
S36: the rated power of two-way booster circuit is not modified, exit.
Three steps of the inventive method, only when inversion module 2 is in original state 3 steps by suitable
Sequence all goes to, and other moment is all by completing step S2 and step S3 realizes the dynamic of rated power
State adjusts.
The present invention is to the rated power of the first booster circuit 11 and the rated power weight of the second booster circuit 12
During new assignment, the rated power of the first booster circuit 11 and the rated power sum of the second booster circuit 12 are protected
Hold constant, and the rated power of each booster circuit is all higher than its actual power.In step s3
Step S33 and S35 have a process taking half value, and this allows for the illumination that two groups of photovoltaic panels receive
Intensity is in constantly conversion, in order to avoid frequently occurring booster circuit previous moment actual power less than specified
Power, and subsequent time actual power is more than the phenomenon of rated power, because the appearance of this phenomenon can cause
System to change rated power frequently.
The control method of the present invention makes the first booster circuit 11 and the second booster circuit 12 can be strong along with illumination
The power of degree obtains rated power dynamically, so can be in the actual power of a road booster circuit equal to specified
The actual power of power and another road booster circuit, less than rated power, time the most a lot, is first
Rated power composed again by booster circuit 11 and the second booster circuit 12, it is ensured that will not be constantly in a road boosting
Equal to its rated power, the actual power of another road booster circuit is less than its specified merit to the actual power of circuit
The state of rate.Making booster circuit can receive more actual power, user can be to electrical network for more
Electricity, it is thus achieved that more economic benefit.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ",
It is concrete that the description of " concrete example " or " some examples " etc. means to combine this embodiment or example describes
Feature, structure, material or feature are contained at least one embodiment or the example of the present invention.In this theory
In bright book, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.And,
The specific features, structure, material or the feature that describe can be in any one or more embodiments or examples
In combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, those of ordinary skill in the art can manage
Solve: these embodiments can be carried out in the case of without departing from the principle of the present invention and objective multiple change,
Amendment, replacement and modification, the scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. a two-way booster circuit inverter system, it is characterised in that including: boost module, inversion module and control mould
Block,
The outfan of described boost module and the 3rd electric capacity are connected, and described 3rd electric capacity is in parallel with inversion module, described inversion module
Export and calculate the initial nominal power of described boost module for the unidirectional current of input being transformed into alternating current；
Described boost module includes the first booster circuit and the second booster circuit；
The input of described first booster circuit and the first DC source are connected, described first booster circuit also with the first power detection
Circuit is connected, and described first power-sensing circuit is for detecting the actual power of described first booster circuit；
The input of described second booster circuit and the second DC source are connected, described second booster circuit also with the second power detection
Circuit is connected, and described second power-sensing circuit is for detecting the actual power of described second booster circuit；
Described control module is respectively connected with described boost module and inversion module, and described control module is according to two-way booster circuit
The size comparative result of actual power and rated power adjusts the size of the rated power of two-way booster circuit.
2. two-way booster circuit inverter system as claimed in claim 1, it is characterised in that described first booster circuit bag
Include the first inductance, the first diode and an IGBT, the positive pole phase of the input of described first inductance and described first DC source
Even, described first diode is connected between outfan and the input of described inversion module of described first inductance, and described first
IGBT is connected between outfan and the negative pole of the first DC source of described first inductance；
Described second booster circuit includes the second inductance, the second diode and the 2nd IGBT, the input of described second inductance and institute
The positive pole stating the second DC source is connected, and described second diode is connected to the outfan of described second inductance and described inversion module
Input between, described 2nd IGBT is connected between outfan and the negative pole of the second DC source of described second inductance.
3. two-way booster circuit inverter system as claimed in claim 1, it is characterised in that described first power detection electricity
Road includes the first voltage sampling circuit and the first current sampling circuit, described first voltage sampling circuit and described first DC source
Parallel connection, described first current sampling circuit is connected with the input of described first booster circuit.
4. two-way booster circuit inverter system as claimed in claim 1, it is characterised in that described second power detection electricity
Road includes the second voltage sampling circuit and the second current sampling circuit, described second voltage sampling circuit and described second DC source
Parallel connection, described second current sampling circuit is connected with the input of described second booster circuit.
5. two-way booster circuit inverter system as claimed in claim 1, it is characterised in that also include the first electric capacity and the
Two electric capacity, described first electric capacity is in parallel with described first DC source, and described second electric capacity is in parallel with described second DC source.
6. two-way booster circuit inverter system as claimed in claim 1, it is characterised in that also include that tertiary voltage detects
Circuit, described tertiary voltage testing circuit is in parallel with described inversion module.
7. a two-way booster circuit inverter system control method, it is characterised in that comprise the steps:
S1: be respectively provided with the first booster circuit and the rated power of the second booster circuit；
S2: detect the first booster circuit and the actual power of the second booster circuit respectively；
S3: the actual power of each booster circuit compared with its rated power, adjusts volume according to the size of actual power
Determine the size of power, keep constant situation at the rated power of the first booster circuit and the rated power sum of the second booster circuit
Under, make the rated power of each booster circuit be all higher than its actual power；
S4: return step S2, until two-way booster circuit inverter quits work, exit.
8. two-way booster circuit inverter system control method as claimed in claim 7, it is characterised in that described step S1
In rated power be initial nominal power, the setting steps of described initial nominal power is:
S11: calculate the power of the DC side of inversion module；
S12: the power of inversion module DC side is halved；
S13: the inversion module DC side power after halving is respectively set to the initial nominal power and second of the first booster circuit
The initial nominal power of booster circuit.
9. two-way booster circuit inverter system control method as claimed in claim 8, it is characterised in that in described step
In S2, detected the actual power of described first booster circuit by the first power-sensing circuit, examined by the second power-sensing circuit
Survey the actual power of described second booster circuit.
10. two-way booster circuit inverter system control method as claimed in claim 7, it is characterised in that described step S3
Comprise the steps:
S31: the size of the actual power of each booster circuit is compared with the size of its rated power；
S32: judge whether that the actual power meeting the first booster circuit is equal to its rated power, and the reality of the second booster circuit
Performance number is less than its rated power；
S33: if the actual power of the first booster circuit is equal to its rated power, and the actual power value of the second booster circuit is little
In its rated power, then make the rated power p1=[p1+ ((p2-P2)/2)] of the first booster circuit, the second booster circuit specified
Power p2=[p2-((p2-P2)/2)], and return step S32, otherwise perform step S34, wherein, p1 is first liter of piezoelectricity
The rated power on road, p2 is the rated power of the second booster circuit, and P1 is the actual power of the first booster circuit, and P2 is second
The actual power of booster circuit；
S34: judge whether that the actual power value meeting the second booster circuit is equal to its rated power, and the reality of the first booster circuit
Border performance number is less than its rated power；
S35: if the actual power value of the second booster circuit is equal to its rated power, and the actual power value of the first booster circuit
Less than its rated power, then make the rated power p2=[p2+ ((p1-P1)/2)] of the second booster circuit, the volume of the first booster circuit
Determine power p1=[p1-((p1-P1)/2)], and return step S32, otherwise perform step S36；
S36: the rated power of two-way booster circuit is not modified, exit.
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| CN201210552822.1A CN103872939B (en) | 2012-12-18 | 2012-12-18 | A kind of two-way booster circuit inverter system and control method thereof |
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| CN201210552822.1A CN103872939B (en) | 2012-12-18 | 2012-12-18 | A kind of two-way booster circuit inverter system and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105527490B (en) * | 2016-01-18 | 2018-05-04 | 吴江德雷克斯电子有限公司 | A kind of low error power computational methods for vehicle-mounted inverter |
| WO2020133351A1 (en) * | 2018-12-29 | 2020-07-02 | 华为技术有限公司 | Inverter |
| CN216959682U (en) * | 2021-12-14 | 2022-07-12 | 阳光电源股份有限公司 | Power equipment and photovoltaic power generation equipment |
| CN117693892A (en) * | 2022-07-30 | 2024-03-12 | 华为数字能源技术有限公司 | Power conversion device, control method and power supply system |
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