CN105826943B - A kind of collecting and distributing type inversion system and its starting method - Google Patents
A kind of collecting and distributing type inversion system and its starting method Download PDFInfo
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- CN105826943B CN105826943B CN201610150108.8A CN201610150108A CN105826943B CN 105826943 B CN105826943 B CN 105826943B CN 201610150108 A CN201610150108 A CN 201610150108A CN 105826943 B CN105826943 B CN 105826943B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005457 optimization Methods 0.000 claims abstract description 87
- 238000004891 communication Methods 0.000 claims abstract description 22
- 230000001939 inductive effect Effects 0.000 claims description 10
- 230000006641 stabilisation Effects 0.000 claims 2
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- 239000003990 capacitor Substances 0.000 description 5
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- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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Classifications
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The present invention provides a kind of collecting and distributing type inversion system and its starting method, judges whether the collecting and distributing type inversion system meets default entry condition by the inverter of collecting and distributing type inversion system；When the collecting and distributing type inversion system meets the default entry condition, notify N number of power optimization device controlled independently of one another with the starting of output voltage source module by communication modes by the inverter；When the inverter judge DC bus-bar voltage meet first preset it is soft open condition when, the inverter is soft to be opened and establishes inverter voltage；When the inverter judge the inverter voltage meet second preset it is soft open condition when, just control A.C. contactor actuation；The soft condition and described second that opens, which is preset, by described first presets the soft judgement for opening condition, its both end voltage meets the condition opened before ensure that the inverter startup, avoid the DC bus-bar voltage it is too low when, the problem larger for the dash current of alterating and direct current container caused by starting to the inverter.
Description
Technical field
The present invention relates to collecting and distributing type inversion system technical field, in particular to a kind of collecting and distributing type inversion system and its starting side
Method.
Background technique
In field of photovoltaic power generation, the advantages of collecting and distributing type inversion system combines string type and centralized inverter, to distribution
The generated energy in formula power station is obviously improved effect.Its system is constituted as shown in Figure 1, the square matrix of 1MW includes that 1 1MW centralization is inverse
Become device, the boost power optimization device and multiple batteries that 1 step-up transformer, the N platform being connected with power grid controls independently of one another
Plate, N are positive integer.
In the system shown in figure 1, the DC bus-bar voltage (such as 820V) of inverter and ac grid voltage (such as
What is 540V) be often arranged is relatively high.The starting for carrying out inverter in this case is attracted when DC bus-bar voltage is lower
The A.C. contactor of inverter, since ac grid voltage is higher, it will generate to ac filter capacitor and DC filtering electricity
Hold very big dash current, peak value often reaches kilo-ampere, influences the service life of capacitor.
Summary of the invention
The present invention provides a kind of collecting and distributing type inversion system and its starting method, when solving inverter startup in the prior art
The problem larger to the dash current of capacitor.
In order to achieve the object, technical solution provided by the present application is as follows:
A kind of starting method of collecting and distributing type inversion system is applied to collecting and distributing type inversion system, the collecting and distributing type inversion system
It include: N number of power optimization device that inverter and output end are parallel to the inverter input terminal；Wherein, the inverter and N number of
Power optimization device includes independent controller, and N is positive integer；The starting method of the collecting and distributing type inversion system includes:
The inverter judges whether the collecting and distributing type inversion system meets default entry condition；
When the collecting and distributing type inversion system meets the default entry condition, the inverter is notified by communication modes
N number of power optimization device is with the starting of output voltage source module；
The inverter judges whether DC bus-bar voltage meets first and preset and soft opens condition；
When the DC bus-bar voltage meet described first preset it is soft open condition when, the inverter is soft to be opened and establishes inversion
Voltage；
The inverter judges whether the inverter voltage meets second and preset and soft opens condition；
When the inverter voltage meet described second preset it is soft open condition when, the inverter control A.C. contactor is inhaled
It closes.
Preferably, the inverter judges the step of whether the collecting and distributing type inversion system meets default entry condition packet
It includes:
The inverter judges whether the DC input voitage of the collecting and distributing type inversion system is more than or equal to preset starting
Voltage.
Preferably, the inverter judges whether DC bus-bar voltage meets first and preset soft the step of opening condition and includes:
The inverter judges whether the DC bus-bar voltage is stable to normal working voltage.
Preferably, the inverter judges whether the inverter voltage meets second and preset soft the step of opening condition and includes:
The inverter judges whether the inverter voltage is stable to network voltage.
Preferably, after the step of inverter control A.C. contactor is attracted further include:
The inverter notifies N number of power optimization device with MPPT maximum power point tracking MPPT search by communication modes
Mode work.
Preferably, notify N number of power optimization device with output voltage source mould by communication modes in the inverter
After the step of formula starts further include: N number of power optimization device is according to formula Vbus_ref_n=Vbus_ref-IL_n×RdummyDynamically
Adjust respective output voltage；Wherein, Vbus_ref_nFor the practical reference value of the output voltage of n-th of power optimization device；Vbus_ref
For the ideal reference of the DC bus-bar voltage；IL_nFor the inductive current of n-th of power optimization device；RdummyFor n-th of power
The resistance value of virtual resistance in the controller of optimizer；N is the positive integer less than or equal to N.
Preferably, N number of power optimization device is notified to open with voltage source mode by communication modes in the inverter
After dynamic step further include: using the output of the average value control ring of the DC bus-bar voltage as Vbus_ref。
A kind of collecting and distributing type inversion system, comprising: inverter and output end are parallel to N number of power of the inverter input terminal
Optimizer；Wherein, the inverter and N number of power optimization device include independent controller, and N is positive integer；The inverter
Include:
First judging unit, for judging whether the collecting and distributing type inversion system meets default entry condition；
First control unit, for passing through communication when the collecting and distributing type inversion system meets the default entry condition
Mode notifies N number of power optimization device with the starting of output voltage source module；
Second judgment unit soft opens condition for judging whether DC bus-bar voltage meets first and preset；
Second control unit, for when the DC bus-bar voltage meet described first preset it is soft open condition when, control institute
State that inverter is soft to be opened and establish inverter voltage；
Third judging unit soft opens condition for judging whether the inverter voltage meets second and preset；
Third control unit, for when the inverter voltage meet described second preset it is soft open condition when, control exchange connect
Tentaculum is attracted.
Preferably, first judging unit is for judging whether the collecting and distributing type inversion system meets default entry condition
When, it is specifically used for: judges whether the DC input voitage of the collecting and distributing type inversion system is more than or equal to preset starting voltage.
Preferably, the second judgment unit soft opens condition for judging whether DC bus-bar voltage meets first and preset
When, it is specifically used for: judges whether the DC bus-bar voltage is stable to normal working voltage.
Preferably, the third judging unit soft opens condition for judging whether the inverter voltage meets second and preset
When, it is specifically used for: judges whether the inverter voltage is stable to network voltage.
Preferably, further includes:
4th control unit is used for after third control unit control A.C. contactor is attracted, by communication side
Formula notifies N number of power optimization device with the work of MPPT search pattern.
Preferably, the second judgment unit soft opens condition for judging whether DC bus-bar voltage meets first and preset
When, it is specifically used for: in N number of power optimization device according to formula Vbus_ref_n=Vbus_ref-IL_n×RdummyDynamic adjusts respective
Output voltage when, judge whether DC bus-bar voltage meets first and preset and soft open condition；Wherein, Vbus_ref_nFor n-th of power
The practical reference value of the output voltage of optimizer；Vbus_refFor the ideal reference of the DC bus-bar voltage；IL_nIt is n-th
The inductive current of power optimization device；RdummyFor the resistance value of virtual resistance in the controller of n-th of power optimization device；N be less than etc.
In the positive integer of N.
Preferably, further includes: the 4th control unit, for adjusting respective output in N number of power optimization device dynamic
When voltage, using the output of the average value control ring of the DC bus-bar voltage as Vbus_ref。
The starting method of collecting and distributing type inversion system provided by the invention judges institute by the inverter of collecting and distributing type inversion system
State whether collecting and distributing type inversion system meets default entry condition；When the collecting and distributing type inversion system meets the default entry condition
When, notify N number of power optimization device controlled independently of one another with output voltage source module by communication modes by the inverter
Starting；When the inverter judge DC bus-bar voltage meet first preset it is soft open condition when, the inverter is soft to be opened and establishes
Inverter voltage；When the inverter judge the inverter voltage meet second preset it is soft open condition when, just control A.C. contactor
It is attracted；The soft condition and described second that opens is preset by described first and presets the soft judgement for opening condition, ensure that the inverter opens
Its both end voltage meets the condition opened before dynamic, avoid the DC bus-bar voltage it is too low when, the inverter is opened
The problem larger for the dash current of alterating and direct current container caused by dynamic.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the collecting and distributing type inversion system that the prior art provides；
Fig. 2 is another flow chart of the starting method of collecting and distributing type inversion system provided in an embodiment of the present invention；
Fig. 3 be another embodiment of the present invention provides collecting and distributing type inversion system starting method another flow chart；
Fig. 4 be another embodiment of the present invention provides collecting and distributing type inversion system starting method another flow chart；
Fig. 5 is another structural schematic diagram for the collecting and distributing type inversion system that the prior art provides；
Fig. 6 be another embodiment of the present invention provides collecting and distributing type inversion system another structural schematic diagram；
Fig. 7 be another embodiment of the present invention provides power optimization device control block diagram；
Fig. 8 be another embodiment of the present invention provides collecting and distributing type inversion system another control block diagram；
Fig. 9 be another embodiment of the present invention provides inverter structural schematic diagram；
Figure 10 be another embodiment of the present invention provides inverter another structural schematic diagram.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
The present invention provides a kind of starting method of collecting and distributing type inversion system, with solve in the prior art inverter startup when pair
The larger problem of the dash current of alterating and direct current container.
Specifically, the starting method of the collecting and distributing type inversion system, is applied to collecting and distributing type inversion system, the collecting and distributing type is inverse
Change system is as shown in Figure 1, comprising: inverter and output end are parallel to N number of power optimization device of the inverter input terminal；Its
In, the inverter and N number of power optimization device include independent controller, and N is positive integer；The collecting and distributing type inversion system
Starting method is as shown in Figure 2, comprising:
S101, the inverter judge whether the collecting and distributing type inversion system meets default entry condition；
Before collecting and distributing type inversion system starting, the inverter needs to carry out the detecting of entry condition, including phase
The detection and judgement answered.For entry condition signal acquisition process herein without limitation, its specific applicable cases can be regarded
Depending on, within the scope of protection of this application.
When the collecting and distributing type inversion system meets the default entry condition, it is logical to execute step S102, the inverter
Crossing communication modes notifies N number of power optimization device with the starting of output voltage source module；
Relative to single power optimization device come by way of realizing inverter soft start, step S102 passes through described N number of
Power optimization device with the starting of output voltage source module, can optimize the generated energy for promoting the collecting and distributing type inversion system jointly.
In specific application, the power optimization device can be Boost power optimization device.
S103, the inverter judge whether DC bus-bar voltage meets first and preset and soft open condition；
After N number of power optimization device is started with output voltage source module, it can be provided for the inverter certain
DC bus-bar voltage；It presets soft when opening condition until the inverter meets described first, executes step S104, the inverter
It is soft to open and establish inverter voltage；
The inverter voltage is the alternating voltage that the inverter generates.
S105, the inverter judge whether the inverter voltage meets second and preset and soft open condition；
When the inverter voltage meet described second preset it is soft open condition when, execute step S106, the inverter control
A.C. contactor is attracted.
The starting method of collecting and distributing type inversion system provided in this embodiment is judged by the inverter of collecting and distributing type inversion system
Whether the collecting and distributing type inversion system meets default entry condition；When the collecting and distributing type inversion system meets the default trip bar
When part, notify N number of power optimization device controlled independently of one another with output voltage by communication modes by the inverter
Source module starting；When the inverter judge DC bus-bar voltage meet first preset it is soft open condition when, the inverter is soft to be opened
And establish inverter voltage；When the inverter judge the inverter voltage meet second preset it is soft open condition when, just control exchanges
Contactor is attracted；The soft condition and described second that opens is preset by described first and presets the soft judgement for opening condition, ensure that described inverse
Become device start before its both end voltage meet open condition, avoid the DC bus-bar voltage it is too low when, to the inverter
The problem larger for the dash current of alterating and direct current container caused by being started.
Another embodiment of the present invention additionally provides the starting method of another collecting and distributing type inversion system, as shown in Fig. 2, packet
It includes:
S101, the inverter judge whether the collecting and distributing type inversion system meets default entry condition；
When the collecting and distributing type inversion system meets the default entry condition, it is logical to execute step S102, the inverter
Crossing communication modes notifies N number of power optimization device with the starting of output voltage source module；
S103, the inverter judge whether DC bus-bar voltage meets first and preset and soft open condition；
When the inverter meet described first preset it is soft open condition when, execute that step S104, the inverter is soft opens simultaneously
Establish inverter voltage；
S105, the inverter judge whether the inverter voltage meets second and preset and soft open condition；
When the inverter voltage meet described second preset it is soft open condition when, execute step S106, the inverter control
A.C. contactor is attracted.
Wherein, optionally, step S101 includes:
The inverter judges whether the DC input voitage of the collecting and distributing type inversion system is more than or equal to preset starting
Voltage.
Preferably, the preset starting voltage is 500V.
The inverter described states the straight of collecting and distributing type inversion system firstly the need of detecting to obtain by corresponding detection device
Input voltage is flowed, then carries out the judgement whether DC input voitage is more than or equal to the preset starting voltage again；Only
Have when the DC input voitage is more than or equal to the preset starting voltage, the collecting and distributing type inversion system just meets default
Entry condition, the inverter could execute step S102.
Optionally, step S103 includes: the inverter judges whether the DC bus-bar voltage is stable to normal work
Voltage.
The inverter judges that the DC bus-bar voltage is stablized to the normal working voltage, illustrates the inversion at this time
The input side of device has met entry condition, can execute step S104, carries out the soft of the inverter and opens and the inversion electricity
The foundation of pressure.
Preferably, the normal working voltage is 820V.
Optionally, step S105 includes: the inverter judges whether the inverter voltage is stable to network voltage.
The inverter judges that the inverter voltage is stablized to the network voltage, illustrates the output of the inverter at this time
Side has met entry condition, and the inverter can execute step S106 and control the A.C. contactor actuation.
Certainly, in specific practical application, the preset starting voltage and the normal working voltage might not
It is defined in this, only a kind of example can be depending on its specific application environment, within the scope of protection of this application.
Another embodiment of the present invention additionally provides the starting method of another collecting and distributing type inversion system, as shown in figure 3, packet
It includes:
S101, the inverter judge whether the collecting and distributing type inversion system meets default entry condition；
When the collecting and distributing type inversion system meets the default entry condition, it is logical to execute step S102, the inverter
Crossing communication modes notifies N number of power optimization device with the starting of output voltage source module；
S103, the inverter judge whether DC bus-bar voltage meets first and preset and soft open condition；
When the inverter meet described first preset it is soft open condition when, execute that step S104, the inverter is soft opens simultaneously
Establish inverter voltage；
S105, the inverter judge whether the inverter voltage meets second and preset and soft open condition；
When the inverter voltage meet described second preset it is soft open condition when, execute step S106, the inverter control
A.C. contactor is attracted.
S107, the inverter notify N number of power optimization device with MPPT (Maximum by communication modes
Power Point Tracking, MPPT maximum power point tracking) search pattern work.
After the A.C. contactor described in the inverter control is attracted, the inverter starts grid-connected, and N number of power is excellent
Changing device should all be incorporated into the power networks with its normal working condition.In specific application, the inverter can pass through communication
Mode notify N number of power optimization device with MPPT search pattern work.
Another embodiment of the present invention additionally provides the starting method of another collecting and distributing type inversion system, as shown in figure 4, packet
It includes:
S101, the inverter judge whether the collecting and distributing type inversion system meets default entry condition；
When the collecting and distributing type inversion system meets the default entry condition, it is logical to execute step S102, the inverter
Crossing communication modes notifies N number of power optimization device with the starting of output voltage source module；
Step S201, N number of power optimization device are executed after step s 102 according to formula Vbus_ref_n=Vbus_ref-
IL_n×RdummyDynamic adjusts respective output voltage, until obtaining the inverter by step S103 and meeting described first in advance
If it is soft open condition until.Wherein, Vbus_ref_nFor the practical reference value of the output voltage of n-th of power optimization device；Vbus_refFor institute
State the ideal reference of DC bus-bar voltage；IL_nFor the inductive current of n-th of power optimization device；RdummyFor n-th of power optimization
The resistance value of virtual resistance in the controller of device；N is the positive integer less than or equal to N.
In addition, after step s 102 can also include: with the output of the average value control ring of the DC bus-bar voltage
As Vbus_ref。
S103, the inverter judge whether DC bus-bar voltage meets first and preset and soft open condition；
When the inverter meet described first preset it is soft open condition when, execute that step S104, the inverter is soft opens simultaneously
Establish inverter voltage；
S105, the inverter judge whether the inverter voltage meets second and preset and soft open condition；
When the inverter voltage meet described second preset it is soft open condition when, execute step S106, the inverter control
A.C. contactor is attracted.
It is worth noting that in the prior art, multiple boost power optimization devices of prime are all made of independent control
It is controlled, with output voltage source modes parallel on DC bus.Respectively worked in a manner of exporting pressure stabilizing, using voltage,
Double current loop modulation.By taking two boost power optimization devices are in parallel as an example, as shown in figure 5, V1 and I1 are that boost power is excellent respectively
Change the output voltage and output electric current of device 1, V2 and I2 are the output voltage and output electric current of boost power optimization device 2, C respectively
For the bus capacitor of centralized inverter.Due to the influence of the environmental factors such as the difference of device, the deviation of sampling, temperature, two
The output voltage of boost power optimization device can not be completely the same；When two boost power optimization devices are directly in parallel, due to
Respectively output internal resistance is very small, even if the difference very little of its output, can also interfere with each other, lead to two output electric currents I1 and I2 not
, output voltage fluctuation is eventually led to.
And the present embodiment (in specific practical application, can be used for the power optimization device of multiple independent controls
Boost output voltage source) under form directly in parallel, there is output current unevenness and the problem of output voltage fluctuates, pass through function
Increased virtual resistance is (as shown in fig. 6, V1 and I1 are the output of boost power optimization device 1 respectively in the controller of rate optimizer
Voltage and output electric current, V2 and I2 are the output voltage and output electric current of boost power optimization device 2 respectively, and C is centralized inversion
The bus capacitor of device, RdummyThe resistance value of increased virtual resistance in controller for power optimization device) and formula Vbus_ref_n=
Vbus_ref-IL_n×Rdummy, the output of voltage source, I are intelligently adjusted using boost inductive currentLnIt is bigger, Vbus_ref_nIt is smaller, with
This inhibits inductive current uneven, stablizes output busbar voltage, simple and easy, stability is high.
In addition, utilizing principle of stacking, V when exporting bus not band loadbus=1/2 × (V1+V2), VbusIt is female for the direct current
Line voltage.When exporting bus belt load, due to the introducing of virtual resistance (resistance value is smaller), output can be lower than the DC bus electricity
The ideal reference V of pressurebus_refIt, can be by increasing an average value if more demanding to output busbar voltage regulation
Control ring, output are used as Vbus_ref, the average value of output busbar voltage is adjusted, output voltage regulation is reduced.
In specific practical application, each power optimization device can be Boost power optimization device, and output-parallel is steady
The control block diagram flowed is pressed as shown in fig. 7, passing through voltage source output-parallel, and utilize formula Vbus_ref_n=Vbus_ref-IL_n×
RdummyRealize pressure stabilizing sharing control, wherein RdummyFor the resistance value of virtual resistance in the controller of n-th of power optimization device；N is
Positive integer less than or equal to N；Vbus_ref_nFor the practical reference value of the output voltage of n-th of power optimization device；Vbus_refIt is described
The ideal reference of DC bus-bar voltage；IL_nFor the inductive current of n-th of power optimization device, value is bigger, and n-th of power is excellent
Change the practical reference value V of the output voltage of devicebus_ref_nIt is smaller, inhibit inductive current uneven with this, dynamic calibration output voltage；
And Voltage loop, V are controlled by PIfdb_nFor power optimization device n sampling and outputting voltage Vout_nObtained value of feedback, Voltage loop it is defeated
Out as the reference value I of electric current loopref_n；Electric current loop, I are controlled by PIfdb_nInductive current I is sampled for power optimization device nL_n?
The value of feedback arrived, the output of electric current loop are modulating wave Vm_n.The hardware circuit of power optimization device n can use in the present embodiment
Boost circuit.
Increase the control block diagram of average value control ring as shown in figure 8, the control function of its average value control ring is by described inverse
Become device to complete.Vbus_avg_refFor the reference value of DC bus-bar voltage average value, generally 820V；Vbus_avg_fdbFor DC bus
The value of feedback of average voltage, by being obtained after inverter sampling DC bus-bar voltage by mean value calculation.It is described average
It is worth the output of control ring as Vbus_refAll power optimization devices are handed down to by communication modes；Vbus_refIt is excellent for power
Change the ideal reference of device output voltage.Each power optimization device (power optimization device 1, power optimization device 2 to power optimization device n)
The V issued according to the inverterbus_ref, and itself output voltage, V are adjusted using virtual resistance method dynamicout_nBefore parallel connection
The output voltage of power optimization device n.Then DC bus-bar voltage V is sampled by the inverterbus, and carry out mean value calculation.
Another embodiment of the present invention additionally provides a kind of collecting and distributing type inversion system, as shown in Figure 1, comprising: inverter and defeated
Outlet is parallel to N number of power optimization device of the inverter input terminal；Wherein, the inverter and N number of power optimization device wrap
Independent controller is included, N is positive integer；The inverter is as shown in Figure 9, comprising:
First judging unit 101, first control unit 102, second judgment unit 103, the second control unit 104, third
Judging unit 105 and third control unit 106.
Wherein, the first judging unit 101 is for judging whether the collecting and distributing type inversion system meets default entry condition；
First control unit 102 is used for when the collecting and distributing type inversion system meets the default entry condition, by logical
News mode notifies N number of power optimization device with the starting of output voltage source module；
Second judgment unit 103 soft opens condition for judging whether DC bus-bar voltage meets first and preset；
Second control unit 104 be used for when the DC bus-bar voltage meet described first preset it is soft open condition when, control
The inverter is soft to be opened and establishes inverter voltage；
Third judging unit 105 soft opens condition for judging whether the inverter voltage meets second and preset；
Third control unit 106 be used for when the inverter voltage meet described second preset it is soft open condition when, control exchange
Contactor is attracted.
Collecting and distributing type inversion system provided in this embodiment, by described first preset it is soft open condition and described second preset it is soft
The judgement for opening condition, its both end voltage meets the condition opened before ensure that the inverter startup, and it is female to avoid the direct current
It is biggish for the dash current of alterating and direct current container caused by starting to the inverter to ask when line voltage is too low
Topic.
Preferably, the first judging unit 101 is for judging whether the collecting and distributing type inversion system meets default entry condition
When, it is specifically used for: judges whether the DC input voitage of the collecting and distributing type inversion system is more than or equal to preset starting voltage.
Preferably, second judgment unit 103 for judge DC bus-bar voltage whether meet first preset it is soft open condition when,
It is specifically used for: judges whether the DC bus-bar voltage is stable to normal working voltage.
Preferably, third judging unit 105 for judge the inverter voltage whether meet second preset it is soft open condition when,
It is specifically used for: judges whether the inverter voltage is stable to network voltage.
Preferably, as shown in Figure 10, the inverter further include:
4th control unit 107, for passing through communication after third control unit control A.C. contactor is attracted
Mode notifies N number of power optimization device with the work of MPPT search pattern.
Preferably, second judgment unit 103 for judge DC bus-bar voltage whether meet first preset it is soft open condition when,
It is specifically used for: in N number of power optimization device according to formula Vbus_ref_n=Vbus_ref-IL_n×RdummyDynamic adjusts respective defeated
Out when voltage, judges whether DC bus-bar voltage meets first and preset and soft open condition；Wherein, Vbus_ref_nFor n-th of power optimization
The practical reference value of the output voltage of device；Vbus_refFor the ideal reference of the DC bus-bar voltage；IL_nFor n-th of power
The inductive current of optimizer；RdummyFor the resistance value of virtual resistance in the controller of n-th of power optimization device；N is less than or equal to N's
Positive integer.
Preferably, further includes: the 5th control unit, for adjusting respective output in N number of power optimization device dynamic
When voltage, using the output of the average value control ring of the DC bus-bar voltage as Vbus_ref。
Specific working principle is same as the previously described embodiments, no longer repeats one by one herein.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (8)
1. a kind of starting method of collecting and distributing type inversion system, which is characterized in that be applied to collecting and distributing type inversion system, the collecting and distributing type
Inversion system includes: N number of power optimization device that inverter and output end are parallel to the inverter input terminal；Wherein, described inverse
Become device and N number of power optimization device includes independent controller, N is positive integer；The starting method of the collecting and distributing type inversion system
Include:
The inverter judges whether the DC input voitage of the collecting and distributing type inversion system is more than or equal to preset starting voltage；
When the DC input voitage of the collecting and distributing type inversion system is more than or equal to preset starting voltage, the inverter passes through
Communication modes notify N number of power optimization device to provide DC bus with the starting of output voltage source module, for the inverter
Voltage；
N number of power optimization device is according to formula Vbus_ref_n=Vbus_ref-IL_n×RdummyDynamic adjusts respective output voltage；
Wherein, Vbus_ref_nFor the practical reference value of the output voltage of n-th of power optimization device；Vbus_refFor the DC bus-bar voltage
Ideal reference；IL_nFor the inductive current of n-th of power optimization device；RdummyFor the controller internal weakness of n-th of power optimization device
The resistance value of quasi- resistance；N is the positive integer less than or equal to N；
Until judging whether DC bus-bar voltage is stable to normal working voltage, obtains the DC bus by the inverter
When voltage stabilization to normal working voltage, the inverter is soft to be opened and establishes inverter voltage；
The inverter judges whether the inverter voltage meets second and preset and soft opens condition；
When the inverter voltage meet described second preset it is soft open condition when, the inverter control A.C. contactor is attracted.
2. the starting method of collecting and distributing type inversion system according to claim 1, which is characterized in that the inverter judges institute
It states inverter voltage and whether meets second and preset soft the step of opening condition and include: the inverter judges whether the inverter voltage is steady
Determine to network voltage.
3. the starting method of collecting and distributing type inversion system according to claim 1, which is characterized in that in the inverter control
After the step of A.C. contactor is attracted further include:
The inverter notifies N number of power optimization device with MPPT maximum power point tracking MPPT search pattern by communication modes
Work.
4. the starting method of collecting and distributing type inversion system according to claim 1, which is characterized in that pass through in the inverter
After the step of communication modes notify N number of power optimization device to start with output voltage source module further include: with described straight
The output of the average value control ring of busbar voltage is flowed as Vbus_ref。
5. a kind of collecting and distributing type inversion system characterized by comprising inverter and output end are parallel to the inverter input terminal
N number of power optimization device；Wherein, the inverter and N number of power optimization device include independent controller, and N is positive integer；Institute
Stating inverter includes:
First judging unit, for judging whether the DC input voitage of the collecting and distributing type inversion system is more than or equal to preset open
Dynamic voltage；
First control unit is more than or equal to preset starting voltage for the DC input voitage when the collecting and distributing type inversion system
When, notify N number of power optimization device to provide directly with the starting of output voltage source module, for the inverter by communication modes
Flow busbar voltage；
Second judgment unit is used in N number of power optimization device according to formula Vbus_ref_n=Vbus_ref-IL_n×RdummyDynamically
When adjusting respective output voltage, judge whether DC bus-bar voltage is stable to normal working voltage；Wherein, Vbus_ref_nIt is n-th
The practical reference value of the output voltage of a power optimization device；Vbus_refFor the ideal reference of the DC bus-bar voltage；IL_nFor
The inductive current of n-th of power optimization device；RdummyFor the resistance value of virtual resistance in the controller of n-th of power optimization device；N is small
In the positive integer for being equal to N；
Second control unit, for it is soft to control the inverter when DC bus-bar voltage stabilization to normal working voltage
It opens and establishes inverter voltage；
Third judging unit soft opens condition for judging whether the inverter voltage meets second and preset；
Third control unit, for when the inverter voltage meet described second preset it is soft open condition when, control A.C. contactor
It is attracted.
6. collecting and distributing type inversion system according to claim 5, which is characterized in that the third judging unit is for judging institute
It states inverter voltage and whether meets second and preset soft when opening condition, be specifically used for: judging whether the inverter voltage is stable to power grid
Voltage.
7. collecting and distributing type inversion system according to claim 5, which is characterized in that further include:
4th control unit, for being led to after third control unit control A.C. contactor is attracted by communication modes
Know N number of power optimization device with the work of MPPT search pattern.
8. collecting and distributing type inversion system according to claim 5, which is characterized in that further include: the 5th control unit is used for
When N number of power optimization device dynamic adjusts respective output voltage, with the average value control ring of the DC bus-bar voltage
Output is used as Vbus_ref。
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| CN106786737B (en) * | 2016-12-22 | 2019-03-08 | 国电南京自动化股份有限公司 | A kind of low voltage traversing control method for collecting and distributing type photovoltaic generating system |
| CN108258718B (en) * | 2016-12-29 | 2021-01-26 | 北京天诚同创电气有限公司 | Inverter, distributed combiner box, power limiting control system and method |
| CN106992550B (en) * | 2017-05-26 | 2021-04-13 | 阳光电源股份有限公司 | Control device and collection flow box |
| CN106992554B (en) * | 2017-06-08 | 2020-02-11 | 合肥阳光智维科技有限公司 | Optimizer control method, coordination control method, device and system |
| CN109525283B (en) * | 2017-09-18 | 2021-05-28 | 丰郅(上海)新能源科技有限公司 | Method for realizing transmission and reception of carrier signals in solar power generation system |
| CN108599265A (en) * | 2018-05-15 | 2018-09-28 | 许继电气股份有限公司 | A kind of photovoltaic synchronization inverter system and inverter startup control method |
| CN109103921A (en) * | 2018-07-09 | 2018-12-28 | 许继集团有限公司 | A kind of boosting of photovoltaic DC collects system and its starting control method |
| CN109327153A (en) * | 2018-10-15 | 2019-02-12 | 四川长虹电器股份有限公司 | The single-phase off-network inverter control method of photovoltaic |
| CN109980696B (en) * | 2019-04-04 | 2020-09-29 | 重庆吉力芸峰实业(集团)有限公司 | Power balance control method for parallel operation of inverter controllers of generator set |
| CN113037094B (en) * | 2021-03-16 | 2022-03-25 | 中车青岛四方车辆研究所有限公司 | Inverter control method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789606A (en) * | 2010-03-12 | 2010-07-28 | 合肥阳光电源有限公司 | Boosting method for synchronization without insulating photovoltaic grid-connected inverters |
| CN102255529A (en) * | 2011-06-17 | 2011-11-23 | 湖南大学 | Comprehensive control method for high-power efficient energy consuming high-frequency switching power supply |
| CN104333213A (en) * | 2014-11-25 | 2015-02-04 | 阳光电源股份有限公司 | Protecting method for output overvoltage of PV array, device and system |
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-
2016
- 2016-03-16 CN CN201610150108.8A patent/CN105826943B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789606A (en) * | 2010-03-12 | 2010-07-28 | 合肥阳光电源有限公司 | Boosting method for synchronization without insulating photovoltaic grid-connected inverters |
| CN102255529A (en) * | 2011-06-17 | 2011-11-23 | 湖南大学 | Comprehensive control method for high-power efficient energy consuming high-frequency switching power supply |
| CN104333213A (en) * | 2014-11-25 | 2015-02-04 | 阳光电源股份有限公司 | Protecting method for output overvoltage of PV array, device and system |
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