CN104156028A - MPPT (maximum power point tracking) compensator of photovoltaic power generation system - Google Patents
MPPT (maximum power point tracking) compensator of photovoltaic power generation system Download PDFInfo
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The invention provides an MPPT (maximum power point tracking) compensator of a photovoltaic power generation system. The MPPT compensator comprises a DC/DC module, an inverter and at least two strings. The strings are connected with one another in parallel, and each string is connected to the DC/DC module; an input end of the DC/DC module is connected to an anode of a bus, and another input end of the DC/DC module is connected to a cathode of the bus; two output ends of the DC/DC module are respectively connected with the bus and the strings or are respectively connected to the bus by the strings; the DC/DC module which corresponds to the strings outputs compensation voltages delta V<n> when voltages V of the bus are inconsistent with a voltage V<n> which corresponds to the maximum power point of an optional string, so that each string can work at the maximum power point of the string, and the compensation voltages delta V<n> meet an equation of delta V<n>=V-V<n>. The MPPT compensator has the advantages that each string is serially connected with the DC/DC module, accordingly, voltage compensation can be carried out for each string, the various strings can work at the maximum power points, and the gross power generation of the photovoltaic power generation system can be increased by 3-5%.
Description
Technical field
The present invention relates to a kind of MPPT compensator, relate in particular to a kind of MPPT compensator of photovoltaic generating system.
Background technology
Due to the otherness of cell panel itself, even the cell panel of the serial connection of the different group string in photovoltaic generating system same number, the output total voltage of its photovoltaic group string is also not necessarily identical, and this will cause the maximum power point of each photovoltaic group string also can be variant.And solar photovoltaic generation system has been obtained large-scale application, large-sized photovoltaic power station is by all groups of string cell panels all and together, but only has a road MPPT, so, the electricity generation system in this large-sized photovoltaic power station can not make each photovoltaic group string be operated in maximum power point, and then has reduced system generated energy; And because property difference, pollution level and the degree of aging of photovoltaic group string are inconsistent, the maximum power point of each group of string is certain to there are differences.
In prior art, because property difference, pollution level and the degree of aging of group string are inconsistent, the maximum power point of each group of string all likely there are differences.
As shown in Figure 2, the corresponding voltage of the maximum power point of first group of string is at V
1, the corresponding voltage of maximum power point of second group of string is at V
2, the corresponding voltage of maximum power point of the 3rd group of string is at V
3; In the time that all group strings are all connected in parallel, the operating voltage of each group of string is consistent, if system busbar voltage power supply is at V
2time, second group of string reached maximum power point, and first group of string and the 3rd group of string all do not reach maximum power point, will cause like this generated energy of whole photovoltaic generating system to reduce.
The photovoltaic group string that this routine described group of string is photovoltaic generating system, each group string is all in series with DC/DC module; Described DC/DC module is the DC/DC module with multichannel output, and export all with MPPT function on its each road, and MPPT is MPPT maximum power point tracking; Described bucking voltage Δ V
nfor the bucking voltage that each road output terminal of DC/DC module is exported the group string connecting separately, this bucking voltage can make the group string being compensated be operated under maximum power point, and n is the natural number of representative group string number.
This routine described DC/DC module is in series with group string respectively by output terminal, and then can carry out voltage compensation for each group string, for example, be the voltage V corresponding to maximum power point of second group string when busbar voltage
2time, second group of string reached maximum power point, but now the maximum power point of first group of string at V
1, the output terminal of the DC/DC module corresponding with first group of string will be exported bucking voltage Δ V so
1=V
2-V
1, make first group of string be operated in maximum power point v
1; And the output terminal of DC/DC module corresponding to the 3rd group of string will be exported bucking voltage Δ V
3=V
2-V
3, make the 3rd group of string be operated in maximum power point V
3.By this routine MPPT compensator, can make each the group string in photovoltaic generating system all be operated in maximum power point, promote the generated energy of photovoltaic generating system, meanwhile, owing to just supplementing the part voltage difference of portion's packet chain, so, the power of DC/DC module is very little, and cost is low.
The corresponding voltage V of maximum power point of described each group string
nbe each discrepant, so, before compensating, this example can and then obtain the corresponding voltage V of maximum power point of each group string according to the voltage of each group string of real-time measurement and power relation
n; If measuring the power of some group of string increases along with the increase of voltage, illustrate that this group string does not also arrive its maximum power point, now, continue to strengthen the voltage of this group string, such as each 2～5V that increases, until while reducing along with the increase of voltage, illustrating the corresponding voltage of maximum power point of this group string, just measures between measurement last time at this power of this group string; Then, progressively dwindle the gap that this group is gone here and there between the voltage of this measurement and the voltage of measurement last time, until find power to change from increasing along with the increase of voltage the turning point reducing along with the increase of voltage into, the voltage that this turning point is corresponding is exactly the corresponding voltage V of this group string maximum power point
n; Therefore, at the corresponding voltage V of maximum power point that obtains each group string
n, the required bucking voltage Δ V that group string is compensated is exported on each road that just can obtain DC/DC module
n, and then ensure that each group string is all operated in maximum power point; And for the error of maximum power point, depend primarily on two voltage differences between adjacent measurement.Because the mode of this example compensation is to carry out independent and man-to-man voltage compensation for each group string, therefore, compensatory reactionBu Changfanying speed is fast, efficiency is high, the speed of compensation can reach a millisecond rank, such as 100 milliseconds, make each group string all can obtain fast very effective voltage compensation, really promoted the generated energy of photovoltaic generating system and the object of controlling cost.
As shown in Figure 1, an input end of this routine described DC/DC module is all received bus positive pole, and another input end is all received bus negative pole; An output terminal of described DC/DC module is all received bus negative pole, another output terminal is all received in group string separately, so just DC/DC module serial connection is placed on to the bottom of group string, realizing on the basis that promotes the generated energy of photovoltaic generating system and control cost, also make to connect up simple and clear, clear, circuit is standardized and orderly, is difficult for makeing mistakes.
This example is connected with each group respectively by multiple output terminals of described DC/DC module, and then can carry out respectively voltage compensation for each group string, make each group string all be operated in maximum power point, promote the generated energy of photovoltaic generating system, simultaneously, the power of described DC/DC module is little, and cost is low.
Summary of the invention
Technical matters to be solved by this invention is that a kind of MPPT compensator that carries out the photovoltaic generating system of voltage compensation for each group string need to be provided, make each group string all be operated in maximum power point, promote the generated energy of photovoltaic generating system, and rationally control cost.
To this, the invention provides a kind of MPPT compensator of photovoltaic generating system, comprising: DC/DC module, inverter and at least two group strings parallel with one another, each group string is all connected to DC/DC module; An input end of described DC/DC module is connected to bus positive pole, and another input end is connected to bus negative pole; Two output terminals of described DC/DC module are connected or are contacted and be connected to bus by group respectively with group string with bus respectively; As the corresponding voltage V of maximum power point of busbar voltage V and any one group string
nwhen inconsistent, this group is gone here and there corresponding DC/DC module output bucking voltage Δ V
n, make each group string all be operated in its maximum power points, wherein, described bucking voltage Δ V
n=V-V
n.
The present invention is all in series with DC/DC module by each group string, group string or several groups of series windings are connected to one one to one in DC/DC module, and then can carry out respectively voltage compensation for each group string, make each group string all be operated in maximum power point, make the gross generation of whole photovoltaic generating system improve 3～5%.。
The described group of photovoltaic group string that string is photovoltaic generating system, each group string is all in series with DC/DC module; Described DC/DC module is the DC/DC module with multichannel output, and each road output of this DC/DC module is all connected in series mutually with a group string and all with MPPT function, described DC/DC module acts on the outside of group string; Two output terminals of described DC/DC module are connected with group string with bus respectively, or two output terminals of described DC/DC module are contacted and are connected to bus by group respectively; Described bucking voltage Δ V
nfor the bucking voltage that each road output terminal of DC/DC module is exported the group string connecting separately, this bucking voltage can make the group string being compensated be operated under maximum power point, and n is the natural number of representative group string number.
Described DC/DC module is in series with group string respectively by output terminal, and then can carry out voltage compensation for each group string, for example, be the voltage V corresponding to maximum power point of second group string when busbar voltage
2time, second group of string reached maximum power point, but now the maximum power point of first group of string at V
1, the output terminal of the DC/DC module corresponding with first group of string will be exported bucking voltage Δ V so
1=V
2-V
1, make first group of string be operated in maximum power point v
1; And the output terminal of DC/DC module corresponding to the 3rd group of string will be exported bucking voltage Δ V
3=V
2-V
3, make the 3rd group of string be operated in maximum power point V
3.By MPPT compensator of the present invention, can make each the group string in photovoltaic generating system all be operated in maximum power point, promote the generated energy of photovoltaic generating system, meanwhile, owing to just supplementing the part voltage difference of portion's packet chain, so, the power of DC/DC module is very little, and cost is low.
The corresponding voltage V of maximum power point of described each group string
nbe each discrepant, so, before compensating, can and then obtain the corresponding voltage V of maximum power point of each group string according to the voltage of each group string of real-time measurement and power relation
n; If measuring the power of some group of string increases along with the increase of voltage, illustrate that this group string does not also arrive its maximum power point, now, continue to strengthen the voltage of this group string, such as each 2～5V that increases, until while reducing along with the increase of voltage, illustrating the corresponding voltage of maximum power point of this group string, just measures between measurement last time at this power of this group string; Then, progressively dwindle the gap that this group is gone here and there between the voltage of this measurement and the voltage of measurement last time, until find power to change from increasing along with the increase of voltage the turning point reducing along with the increase of voltage into, the voltage that this turning point is corresponding is exactly the corresponding voltage V of this group string maximum power point
n; Therefore, at the corresponding voltage V of maximum power point that obtains each group string
n, the required bucking voltage Δ V that group string is compensated is exported on each road that just can obtain DC/DC module
n, and then ensure that each group string is all operated in maximum power point; And for the error of maximum power point, depend primarily on two voltage differences between adjacent measurement.Because the mode of the present invention's compensation is to carry out independent and man-to-man voltage compensation for each group string, compensatory reactionBu Changfanying speed is fast, efficiency is high, the speed of compensation can reach a millisecond rank, such as 100 milliseconds, make each group string all can obtain fast very effective voltage compensation, really promoted the generated energy to photovoltaic generating system.
Further improvement of the present invention is, an output terminal of described DC/DC module is connected to bus negative pole, and another output terminal of described DC/DC module is connected to respectively the negative pole of each group string, and the positive pole of described group of string is connected with bus positive pole.
That is to say, an input end of described DC/DC module is all received bus positive pole, and another input end is all received bus negative pole; An output terminal of described DC/DC module is all received bus negative pole, another output terminal is all received in group string separately, so just DC/DC module serial connection is placed on to the bottom of group string, realizing on the basis that promotes the generated energy of photovoltaic generating system and control cost, also make to connect up simple and clear, clear, circuit is standardized and orderly, is difficult for makeing mistakes.
Further improvement of the present invention is, an output terminal of described DC/DC module is connected to bus positive pole, and it is anodal that another output terminal of described DC/DC module is connected to each group string, and the negative pole of described group of string is connected with bus negative pole.
That is to say, described DC/DC module is serially connected in the top of group string, and an input end of described DC/DC module is all received bus positive pole, and another input end is all received bus negative pole; An output terminal of described DC/DC module is all received bus positive pole, another output terminal is all received the top of each group string, having realized on the basis that promotes the generated energy of photovoltaic generating system and control cost, also makes to connect up simple and clear, clear, circuit is standardized and orderly, is difficult for makeing mistakes.
Further improvement of the present invention is, described DC/DC module comprises at least two DC/DC unit, and the quantity of described DC/DC unit equates with the quantity of group string, and each group is gone here and there and all connected a DC/DC unit one to one.By the DC/DC module of the most basic DC/DC unit member multichannel output, each group string all connects a DC/DC unit one to one, and each DC/DC unit, all with MPPT function, makes the MPPT control of each group string more flexible effectively, with strong points, efficiency is high.
Further improvement of the present invention is, an output terminal of described DC/DC unit is all connected directly to bus, another output terminal is connected in series mutually with each self-corresponding group of string, and between described DC/DC unit and the group string of series connection with it, the new group string of composition, parallel with one another between each new group of string.
Further improvement of the present invention is, described DC/DC module comprises controller, first order transducer and second level transducer, and described controller is connected with second level transducer with first order transducer respectively.Wherein, described first order transducer is preferably realized by isolated form full-bridge phase shifting unit, and described second level transducer is preferably realized by pressure unit.
Further improvement of the present invention is, the quantity of described second level transducer equates with the quantity of group string, and described controller and first order transducer are connected to by the second level transducer work loop that group is gone here and there one to one respectively.
Further improvement of the present invention is, described controller sends respectively and drives signal to first order transducer and second level transducer; And then control output voltage adjustment to second level transducer described controller gathers respectively the input voltage of first order transducer and the output voltage of second level transducer, and then controls the output voltage of each second level transducer.
Further improvement of the present invention is, described DC/DC module comprises MPPT unit, and described MPPT unit comprises the following steps: first, the voltage and current of controller collection group string, calculates the output general power of current group of string; Secondly, first order transducer and second level transducer are started working, and attempt increasing or reducing the output voltage of current group of string; Then, controller gathers the voltage and current of this group string again, if this group string increased power, again to its output voltage of equidirectional adjustment; If power declines, to attempting adjusting its output voltage in the other direction; Until find the maximum power point of this group string.
Wherein, described MPPT unit is for realizing the MPPT function to each group string.
Further improvement of the present invention is, described inverter also comprises MPPT module, for realizing the adjustment to busbar voltage; The MPPT module work period of described inverter, both performing steps were the same much larger than the work period of the MPPT unit of DC/DC module.
The MPPT module cycle of inverter is long, is responsible for busbar voltage to be adjusted to system maximum power point (mpp).And the MPPT unit of DC/DC module is on stable busbar voltage, be responsible for the compensation group string voltage difference of maximum power point before, make each group of string be operated in maximum power point.Because DC/DC module output voltage is lower, if busbar voltage is too low or too high, make the maximum power point voltage of busbar voltage away from group string, DC/DC module cannot be pressed group crosstalk to be adjusted to maximum power point.Therefore, need the MPPT module of inverter and the MPPT unit of DC/DC module to cooperatively interact, just can make group string Maximum Power Output.In fact, the speed of the MPPT module of photovoltaic DC-to-AC converter self is second level, and the MPPT unit of DC/DC module only need to be less than the maximal power tracing that 100mS can realization group string.
Because the output voltage of DC/DC module is well below bus, therefore the power of DC/DC module is less, and cost is low.
Compared with prior art, beneficial effect of the present invention is: the multiple output terminals by described DC/DC module are connected with each group respectively, and then can carry out respectively voltage compensation for each group string, make each group string all be operated in its maximum power point, promoted the generated energy of photovoltaic generating system.
Actual test result shows, introduce the MPPT compensator of DC/DC module, in the large-scale ground photovoltaic plant of northwest, the generated energy of system can promote 1～3% left and right, annual earnings increase can reach 80,000/MW, MPPT compensator is recovery cost in 0.5～2 year, and the operation life of photovoltaic plant is 25 years, and the sustainable profit of client for many years.And tenure of use is longer, assembly is aging, pollution otherness is larger, and MPPT compensator effect is just better.Therefore, MPPT supplements the huge income that can client arrives.And in distributed photovoltaic generating system, assembly installation position changes greatly, block situation difference large, present larger property difference, use the generated energy of the photovoltaic generating system of MPPT compensator to promote and can reach 3～5%, client's income is more obvious.
Brief description of the drawings
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is the schematic diagram that is related to of the power of group string of an embodiment of the present invention and operating voltage;
Fig. 3 is the structural representation of the another kind of embodiment of the present invention;
Fig. 4 is the circuit topology figure of the DC/DC module of the another kind of embodiment of the present invention;
Fig. 5 is the workflow schematic diagram of another embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, preferably embodiment of the present invention is described in further detail.
Embodiment 1:
As shown in Figure 1, this example provides a kind of MPPT compensator of photovoltaic generating system, comprising: DC/DC module, inverter and at least two group strings parallel with one another; An input end of described DC/DC module is connected to bus positive pole, and another input end is connected to bus negative pole; An output terminal of described DC/DC module is connected to bus, and another output terminal is in series with group string separately respectively, and described group of string is connected with bus respectively; Described bus positive pole and bus negative pole are connected to respectively inverter; As the corresponding voltage V of maximum power point of busbar voltage V and any one group string
nwhen inconsistent, described DC/DC module output bucking voltage Δ V
nto the work loop at this group string place, make each group string be operated in its maximum power points, wherein, described bucking voltage Δ V
n=V-V
n.Fig. 1 is the structural representation of a simplification, and in fact, group string (photovoltaic battery panel) also needs, through header box and power distribution cabinet, finally to access among inverter.
Embodiment 2:
As shown in Figure 3, as different from Example 1, an output terminal of this routine described DC/DC module is connected to bus positive pole, and it is anodal that another output terminal of described DC/DC module is connected to each group string, and the negative pole of described group of string is connected with bus negative pole.
That is to say, described DC/DC module is serially connected in the top of group string, and an input end of described DC/DC module is all received bus positive pole, and another input end is all received bus negative pole; An output terminal of described DC/DC module is all received bus positive pole, another output terminal is all received the top of each group string, having realized on the basis that promotes the generated energy of photovoltaic generating system and control cost, also makes to connect up simple and clear, clear, circuit is standardized and orderly, is difficult for makeing mistakes.
Embodiment 3:
On the basis of embodiment 1 or embodiment 2, this routine described DC/DC module comprises at least two DC/DC unit, and the quantity of described DC/DC unit equates with the quantity of group string, and each group is gone here and there and all connected a DC/DC unit one to one.By the DC/DC module of the most basic DC/DC unit member multichannel output, each group string all connects a DC/DC unit one to one, and each DC/DC unit, all with MPPT function, makes the MPPT control of each group string more flexible effectively, with strong points, efficiency is high.
Described in this example, at least two DC/DC unit are in parallel each other, and an output terminal of described DC/DC unit is all connected directly to bus, and another output terminal is connected in series mutually with each self-corresponding group of string.
Embodiment 4:
As shown in Figure 4, on the basis of embodiment 1 and embodiment 2, this routine described DC/DC module comprises controller, first order transducer and second level transducer, and described controller is connected with second level transducer with first order transducer respectively.
The quantity of this routine described second level transducer equates with the quantity of group string, and described controller and first order transducer are connected to by the second level transducer work loop that group is gone here and there one to one respectively.Described controller sends respectively and drives signal to first order transducer and second level transducer; Described controller gathers respectively the input voltage of first order transducer and the output voltage of second level transducer, and then controls the output voltage of each second level transducer.
This example is also applicable to embodiment 3.
Embodiment 5:
On the basis of embodiment 4, described DC/DC module comprises MPPT unit, and described MPPT unit comprises the following steps: first, the voltage and current of controller collection group string, calculates the output general power of current group of string; Secondly, first order transducer and second level transducer are started working, and attempt increasing or reducing the output voltage of current group of string; Then, controller gathers the voltage and current of this group string again, if this group string increased power, again to its output voltage of equidirectional adjustment, be originally that increasing output voltage also continues to increase its output voltage, be originally that reducing output voltage just continues to reduce its output voltage; If power decline is adjusted its output voltage to trial in the other direction, be originally that increasing output voltage just changes into its output voltage of minimizing, be originally that reducing output voltage just changes into its output voltage of increase; Until find the maximum power point of this group string.So periodic duty, can realize the MPPT function that each group is gone here and there.
Fig. 5 is the workflow diagram of realizing of this routine MPPT unit, as shown in Figure 5, after initialization, the voltage V of controller collection group string
kand current value I
k, calculate the output general power of current group of string; Secondly, first order transducer and second level transducer are started working, and attempt increasing or reducing the output voltage of current group of string, i.e. second level transducer output △ V; Then, controller gathers the voltage V of this group string again
k+1and current value I
k+1if, this group string increased power, i.e. V
k+1* I
k+1> V
k* I
k, again to its output voltage of equidirectional adjustment, be originally that increasing output voltage △ V also continues to increase its output voltage △ V, be originally that reducing output voltage △ V just continues to reduce its output voltage △ V; If power decline is adjusted its output voltage to trial in the other direction, be originally that increasing output voltage △ V just changes into its output voltage of minimizing △ V, be originally that reducing output voltage △ V just changes into its output voltage of increase △ V; Then current new output voltage/electric current numerical value is assigned to V
kand I
k, i.e. V
k=V
k+1, I
k=I
k+1, enter next circulation.So periodic duty, can realize the MPPT function that each group is gone here and there, and described k is natural number.
Wherein, described MPPT unit is for realizing the MPPT function to each group string.
The further improvement of this example is, described inverter also comprises MPPT module, for realizing the adjustment to busbar voltage; The MPPT module work period of described inverter is longer than the work period of the MPPT unit of DC/DC module.
Described inverter also comprises MPPT module, and the reaction velocity of the MPPT module of described inverter requires lower, has just enough supported the reasonable adjustment of bus as long as the speed of compensation can reach second rank.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a MPPT compensator for photovoltaic generating system, is characterized in that, comprising: DC/DC module, inverter and at least two group strings parallel with one another, and each group string is all connected to DC/DC module; An input end of described DC/DC module is connected to bus positive pole, and another input end is connected to bus negative pole; Two output terminals of described DC/DC module are connected or are contacted and be connected to bus by group respectively with group string with bus respectively; As the corresponding voltage V of maximum power point of busbar voltage V and any one group string
nwhen inconsistent, this group is gone here and there corresponding DC/DC module output bucking voltage Δ V
n, make each group string all be operated in its maximum power points, wherein, described bucking voltage Δ V
n=V-V
n.
2. the MPPT compensator of photovoltaic generating system according to claim 1, it is characterized in that, an output terminal of described DC/DC module is connected to bus negative pole, another output terminal of described DC/DC module is connected to respectively the negative pole of each group string, and the positive pole of described group of string is connected with bus positive pole.
3. the MPPT compensator of photovoltaic generating system according to claim 1, it is characterized in that, an output terminal of described DC/DC module is connected to bus positive pole, and it is anodal that another output terminal of described DC/DC module is connected to each group string, and the negative pole of described group of string is connected with bus negative pole.
4. according to the MPPT compensator of the photovoltaic generating system described in claims 1 to 3 any one, it is characterized in that, described DC/DC module comprises at least two DC/DC unit, the quantity of described DC/DC unit equates with the quantity of group string, and each group is gone here and there and all connected a DC/DC unit one to one.
5. the MPPT compensator of photovoltaic generating system according to claim 4, it is characterized in that, an output terminal of described DC/DC unit is all connected directly to bus, another output terminal is connected in series mutually with each self-corresponding group of string, between the group string of described DC/DC unit and series connection with it, the new group string of composition, parallel with one another between each new group of string.
6. the MPPT compensator of photovoltaic generating system according to claim 4, is characterized in that, described DC/DC module comprises controller, first order transducer and second level transducer, and described controller is connected with second level transducer with first order transducer respectively.
7. the MPPT compensator of photovoltaic generating system according to claim 6, it is characterized in that, the quantity of described second level transducer equates with the quantity of group string, and described controller and first order transducer are connected to by the second level transducer work loop that group is gone here and there one to one respectively.
8. the MPPT compensator of photovoltaic generating system according to claim 6, is characterized in that, described controller sends respectively and drives signal to first order transducer and second level transducer; Described controller gathers respectively the input voltage of first order transducer and the output voltage of second level transducer, and then controls the output voltage adjustment to second level transducer.
9. the MPPT compensator of photovoltaic generating system according to claim 6, it is characterized in that, described DC/DC module comprises MPPT unit, and described MPPT unit comprises the following steps: first, the voltage and current of controller collection group string, calculates the output general power of current group of string; Secondly, first order transducer and second level transducer are started working, and attempt increasing or reducing the output voltage of current group of string; Then, controller gathers the voltage and current of this group string again, if this group string increased power, again to its output voltage of equidirectional adjustment; If power declines, to attempting adjusting its output voltage in the other direction; Until find the maximum power point of this group string.
10. the MPPT compensator of the photovoltaic generating system described in 9 as requested, is characterized in that, described inverter comprises MPPT module, for realizing the adjustment to busbar voltage; The MPPT module work period of described inverter is longer than the work period of the MPPT unit of DC/DC module.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104953945A (en) * | 2015-07-01 | 2015-09-30 | 中民新能投资有限公司 | High-efficiency photovoltaic power generation system and method |
| CN105353821A (en) * | 2015-11-20 | 2016-02-24 | 中国华能集团清洁能源技术研究院有限公司 | Photovoltaic power optimizer and photovoltaic power generation system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611355A (en) * | 2012-03-13 | 2012-07-25 | 特变电工新疆新能源股份有限公司 | Photovoltaic array combiner box |
| CN103166239A (en) * | 2011-12-09 | 2013-06-19 | 上海康威特吉能源技术有限公司 | Centralized-distributed mixed novel energy power generation system and maximum power point tracking control method |
| US20140103892A1 (en) * | 2012-10-16 | 2014-04-17 | Volterra Semiconductor Corporation | Scalable maximum power point tracking controllers and associated methods |
| JP2014106935A (en) * | 2012-11-29 | 2014-06-09 | Noritz Corp | Power generation system |
| CN103904992A (en) * | 2014-04-16 | 2014-07-02 | 姜炳芳 | Module string type combiner box |
-
2014
- 2014-07-30 CN CN201410371289.8A patent/CN104156028B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166239A (en) * | 2011-12-09 | 2013-06-19 | 上海康威特吉能源技术有限公司 | Centralized-distributed mixed novel energy power generation system and maximum power point tracking control method |
| CN102611355A (en) * | 2012-03-13 | 2012-07-25 | 特变电工新疆新能源股份有限公司 | Photovoltaic array combiner box |
| US20140103892A1 (en) * | 2012-10-16 | 2014-04-17 | Volterra Semiconductor Corporation | Scalable maximum power point tracking controllers and associated methods |
| JP2014106935A (en) * | 2012-11-29 | 2014-06-09 | Noritz Corp | Power generation system |
| CN103904992A (en) * | 2014-04-16 | 2014-07-02 | 姜炳芳 | Module string type combiner box |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953945A (en) * | 2015-07-01 | 2015-09-30 | 中民新能投资有限公司 | High-efficiency photovoltaic power generation system and method |
| CN104953945B (en) * | 2015-07-01 | 2016-08-17 | 中民新能投资有限公司 | High efficiency photovoltaic generating system and electricity-generating method |
| CN105353821A (en) * | 2015-11-20 | 2016-02-24 | 中国华能集团清洁能源技术研究院有限公司 | Photovoltaic power optimizer and photovoltaic power generation system |
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