CN108054998A - A kind of optimizer, photovoltaic generating system and photovoltaic generation control method - Google Patents
A kind of optimizer, photovoltaic generating system and photovoltaic generation control method Download PDFInfo
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- CN108054998A CN108054998A CN201711436645.XA CN201711436645A CN108054998A CN 108054998 A CN108054998 A CN 108054998A CN 201711436645 A CN201711436645 A CN 201711436645A CN 108054998 A CN108054998 A CN 108054998A
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- 230000005611 electricity Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 238000010248 power generation Methods 0.000 abstract description 8
- 238000005457 optimization Methods 0.000 description 7
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
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- H02J3/383—
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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 application provides a kind of optimizer, including anode branch, cathode branch, first voltage sensor, the first capacitance, second voltage sensor, the second capacitance, optimizer switch, optimizer controller and the 3rd current sensor or the first current sensor and the second current sensor.The application also provides a kind of photovoltaic generating system, including photovoltaic string location, inverter, wakes up power supply and wake-up switch；Photovoltaic string location includes at least one set of photovoltaic panel and above-mentioned optimizer.The application also provides a kind of photovoltaic generation control method.The technical solution of the application overcomes weak electric signal communications in the prior art and is easily subject to the shortcomings that power conversion noise and surrounding enviroment noise jamming and communications cost are high in system apart from short, communication robustness, special weak electric signal communication module can be saved, the communications cost of distributed photovoltaic power generation system can be significantly reduced.
Description
Technical field
The present invention relates to field of photovoltaic power generation, and in particular to a kind of optimizer, photovoltaic generating system and photovoltaic generation control
Method.
Background technology
Distributed photovoltaic power generation system has high requirement to the safety management of DC side, in general, optimizer can carry
The DC-DC power conversion circuits of Buck/Boost/Buck-Boost, inverter can be by boost DC-DCs and inversion DC-AC two-stages
Power conversion is formed；Power carrier (PLC) can be increased in system, between optimizer and inverter or wireless (Wireless) is logical
Letter module communicates, i.e., using the communication pattern of weak signal, transmission range is shorter, and communication robustness is also easily subject to system
The interference of middle power conversion noise and surrounding enviroment noise, and using special communication module but also system is with higher
Communications cost.Alternatively, optimizer carries the DC-DC power conversion circuits of Buck-Boost, inverter is only with DC-AC single-stages
Power conversion；Since MPPT and configuration DC-AC input voltage functions are realized by optimizer, must be gathered around between optimizer and inverter
There is the communication function module of energy real-time Transmission sampled data and status information, it is therefore necessary to be used between optimizer and inverter
Power carrier (PLC) or the weak signal communication pattern of wireless (Wireless) mode communicate, short, logical there is also transmission range
The defects of believing that robustness is easily subject to power conversion noise and surrounding enviroment noise jamming in system, communications cost is high.
The content of the invention
According to the application's in a first aspect, providing a kind of optimizer, including anode branch, cathode branch, first voltage
Sensor, the first capacitance, second voltage sensor, the second capacitance, optimizer switch, optimizer controller and current sensor
Module；The optimizer controller is connected with the optimizer Switch Communication；The current sensor module passes for the 3rd electric current
Sensor, first voltage sensor in parallel, the first capacitance, second voltage pass successively between the anode branch and the cathode branch
Sensor and the second capacitance；The optimizer switch is arranged at the anode between first capacitance and the second voltage sensor
Branch road；3rd current sensor is arranged at the first voltage sensor or first capacitance and the second voltage
Cathode branch road between sensor or second capacitance.
Alternatively, the current sensor module is the first current sensor and the second current sensor, the anode branch
First voltage sensor in parallel, the first capacitance, the second capacitance and second voltage sensor successively between the cathode branch；Institute
State the anode branch road that the first current sensor is arranged between the optimizer electrode input end and optimizer switch.
The optimizer switch is arranged at the anode branch road between first capacitance and second capacitance；Described
Two current sensors are arranged at the anode branch road between the optimizer switch and the optimizer output terminal.
According to second aspect, provide a kind of photovoltaic generating system, including photovoltaic string location, inverter, wake up power supply and
Wake-up switch；The photovoltaic string location draws anode transmission line and cathode transmission line, the anode transmission line and described
Cathode transmission line is introduced by the input terminal of the inverter and drawn from the output terminal of the inverter；It is described wake-up power supply with
The inverter parallel；The wake-up switch is arranged in the parallel branch of the wake-up power supply and the inverter.
According to the third aspect, a kind of photovoltaic generation control method is provided, is applied to above-mentioned photovoltaic generating system, bag
Include following process：
The optimizer of the optimizer is controlled to switch machine and is turned off state；
It controls the grid-connected inverters ready, is closed the wake-up switch so that the wake-up switch is described excellent
Change device and initial start identification voltage is provided；
The initial start identification voltage is detected, judges whether the initial start identification voltage conforms to a predetermined condition；
In the case where judging that the initial start identification voltage conforms to a predetermined condition, the optimizer of the optimizer is controlled
Switch is placed in conducting state.
Technical solution using the present invention, in photovoltaic generating system, using strong signal between inverter and optimizer
Realize state recognition communication, overcome weak electric signal communications in the prior art is easily apart from short, communication robustness
Power conversion noise and surrounding enviroment noise jamming and the shortcomings that high communications cost in system, can save optimizer and optimizer
Between and the special weak electric signal communication module between optimizer and inverter, distributed photovoltaic power generation system can be significantly reduced
The communications cost of system.
Description of the drawings
Fig. 1 is the optimizer structure diagram of embodiment one；
Fig. 2 is the optimizer structure diagram of embodiment two；
Fig. 3 is the photovoltaic power generation system structure schematic diagram of embodiment three；
Fig. 4 is the photovoltaic generation control method flow chart of embodiment three；
Fig. 5 is the photovoltaic generation control method flow chart of embodiment three；
Fig. 6 is the photovoltaic generation control method flow chart of embodiment three.
Specific embodiment
The present invention is described in further detail below by specific embodiment combination attached drawing.Wherein different embodiments
Middle similar component employs associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can be without lifting an eyebrow recognize, which part feature
It is dispensed or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please relevant certain operations there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, be described in detail these relevant operations be not it is necessary, they
The general technology knowledge of description and this field in specification can completely understand relevant operation.
In addition, feature described in this description, operation or feature can combine to form respectively in any suitable way
Kind embodiment.Meanwhile each step in method description or action can also can be aobvious and easy according to those skilled in the art institute
The mode carry out order exchange or adjustment seen.Therefore, the various orders in specification and drawings are intended merely to clearly describe a certain
A embodiment is not meant to be necessary order, and wherein some sequentially must comply with unless otherwise indicated.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any order or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
Embodiment one：
It is the optimizer 10 of the present embodiment as shown in Figure 1, including anode branch 101, cathode branch 102, first voltage
Sensor 131, the first capacitance 151, second voltage sensor 132, the second capacitance 152, bypass diode 16, optimizer switch 12
(SW_optimizer), 11 and the 3rd current sensor 143 of optimizer controller.
Optimizer controller 11 and 12 communication connection of optimizer switch, may be employed conducting wire or wirelessly wait communication modes, excellent
The operating status for changing device switch 12 sends control instruction to control by optimizer controller 11.
First voltage sensor 131 in parallel, the first capacitance 151, successively between anode branch 101 and cathode branch 101
Two voltage sensors 132, the second capacitance 152, bypass diode 16；Optimizer switch 12 is arranged at the first capacitance 151 and second
On anode branch 101 between voltage sensor 132.
3rd current sensor 143 is arranged at the cathode branch between the first capacitance 151 and second voltage sensor 132
On 102.In other embodiments of the invention, those skilled in the art are according to actual design needs, the 3rd current sensor
The cathode branch road that can also be arranged between the first capacitance and the second capacitance；Alternatively, it is arranged at first voltage sensor and
Cathode branch road between two voltage sensors；Alternatively, the cathode branch being arranged between first voltage sensor and the second capacitance
On the road.
Optimizer switch 12 can be by least one mechanical switch or electronic switch (such as triode, field-effect tube, silicon-controlled
Thyristor, relay etc.) it forms, it can also be by DC-DC power converter (such as Buck, Boost, Buck-Boost) structure
Into.
Voltage sensor may be employed electric resistance partial pressure mode and realize, can also use voltage induced chip；Current sensor
The scheme that resistance and operational amplifier collocation design may be employed is realized or using dedicated current detecting chip or using suddenly
Your sensor, current sense transformer etc..
Since in photovoltaic generating system, the voltage of photovoltaic panel is changed with the variation of electric current, at optimizer switch
When open/close state, if being not provided with the first capacitance in optimizer, the voltage of photovoltaic panel is present with ceaselessly saltus step, adds in
The effect of first capacitance is to carry out smothing filtering to the voltage of photovoltaic panel.Similarly, the second capacitance is also defeated to optimizer switch
The pulsating volage gone out carries out smothing filtering.
Embodiment two：
The optimizer 100 of the present embodiment is illustrated in figure 2, including anode branch 101, cathode branch 102, first voltage
Sensor 131, the first capacitance 151, the second capacitance 152, second voltage sensor 132, bypass diode 16, optimizer switch
12nd, 11 and first current sensor 141 of optimizer controller, the second current sensor 142.
Optimizer controller 11 and 12 communication connection of optimizer switch；Between anode branch 101 and cathode branch 102 successively
First voltage sensor 131 in parallel, the first capacitance 151, the second capacitance 152, second voltage sensor 132, bypass diode 16；
First current sensor 141 is arranged on the anode branch 101 of optimizer electrode input end and optimizer switch 12 (specifically for example
It can be between optimizer electrode input end and first voltage sensor 131 or 131 and first capacitance of first voltage sensor
On anode branch 101 between 151 or between the first capacitance 151 and optimizer switch 12)；Optimizer switch 12 is arranged at
On anode branch 101 between first capacitance 151 and the second capacitance 152；Second current sensor 142 is arranged at optimizer switch
(for example can be specifically optimizer switch 12 and the second capacitance on anode branch 101 between 12 and optimizer cathode output end
Between 152 either between the second capacitance 152 and second voltage sensor 132 or second voltage sensor 132 with bypass two
On anode branch 101 between pole pipe 16 or between bypass diode 16 and optimizer cathode output end).
The other technical characteristics of the present embodiment optimizer are identical with embodiment one, and so it will not be repeated.
Embodiment three：
The distributed photovoltaic power generation system of the present embodiment is illustrated in figure 3, including photovoltaic string location 01, photovoltaic DC-to-AC converter
02 (Solar/PV Inverter), power supply 03 (Start-up Source) and wake-up switch 04 (SW_start) are waken up.
Photovoltaic string location 01 draws anode transmission line 011 and cathode transmission line 012, anode transmission line 011 and negative
Pole transmission line 012 is introduced by the input terminal of inverter 02 and drawn from the output terminal of inverter 02, and then is connected to power grid.
It is in parallel with inverter 02 to wake up power supply 03；Wake-up switch 04, which is arranged at, wakes up the branch in parallel with inverter 02 of power supply 03
On the road.
Specifically, wake up the positive pole circuit 031 that power supply 03 is drawn from its input terminal and be connected to 02 input terminal of inverter
The anode transmission line 011 of one side wakes up the positive pole circuit 033 that power supply 03 is drawn from its output terminal and is connected to inverter 02
The anode transmission line 011 of output terminal one side；The power cathode circuit 032 that wake-up power supply 03 is drawn from its input terminal is connected to inverse
Become the cathode transmission line 012 of 02 input terminal one side of device, wake up the power cathode circuit 034 that power supply 03 is drawn from its output terminal and connect
It is connected to the cathode transmission line 012 of 02 output terminal one side of inverter.
It can be the power supply being separately configured to wake up power supply 03, such as adapter, power module or inverter aid in
A part (voltage output all the way in accessory power supply multiple-channel output) for power supply, those skilled in the art can also be according to actually setting
Meter situation is using other power source designs.
Wake-up switch 04, which is arranged at, wakes up power supply 03 from the positive pole circuit 031 that its input terminal is drawn, and can be
At least one mechanical switch or electronic switch (such as triode, field-effect tube, silicon controlled crystal brake pipe, relay) are formed.
Photovoltaic string location 01 is composed in series by multigroup photovoltaic panel (PV Panel) with optimizer (Optimizer)；Each group
Photovoltaic panel is series relationship with optimizer, and optimizer uses the optimizer protected such as embodiment one or embodiment two.It is each excellent
The anode branch for changing the electrode input end one side of device is connected to the cathode output end of corresponding photovoltaic panel；Each optimizer cathode input
The cathode branch of end one side is connected to the cathode output end of corresponding photovoltaic panel.It will be appreciated by those skilled in the art that photovoltaic face
Plate can use photovoltaic matrix (Solar Array), photovoltaic string (PV String) or photovoltaic cell (V Battery), photovoltaic cell
Panel is as replacement.
It in photovoltaic string location 01, is drawn as anode transmission line by anode branch, is transmitted by cathode branch as cathode
Circuit is drawn.
Specifically, multigroup photovoltaic panel includes the first photovoltaic panel 20, the first optimizer with optimizer in photovoltaic cells 01
10th, the second photovoltaic panel, the second optimizer ... N photovoltaic panels 020, N optimizers 010.
The anode branch 101 of first optimizer, 10 cathode output end one side is drawn as anode transmission line 011, anode
The anode branch 101 of input terminal one side is connected to the cathode output end of the first photovoltaic panel 20, and negative input one side is born
Pole branch 102 is connected to the cathode output end of the first photovoltaic panel, and the cathode branch 102 of cathode output end one side is connected to
The cathode output end of two optimizers；The anode branch of second optimizer electrode input end one side is being connected to the second photovoltaic panel just
Pole output terminal, the cathode branch of negative input one side are connected to the cathode output end of the second photovoltaic panel, cathode output
The cathode branch of end one side is connected to the 010 electrode input end one side of cathode output end ... N optimizers of the 3rd optimizer
Anode branch is connected to the cathode output end of N photovoltaic panels 020, and the cathode branch of negative input one side is connected to N
The cathode output end of photovoltaic panel 020, the cathode branch of cathode output end one side are drawn as cathode transmission line 012；Its
In, N is greater than or equal to 1.
As shown in figure 4, method, that is, principle that photovoltaic generation control is carried out using the photovoltaic generating system of the present embodiment is as follows：
On St1, optimizer it is electrically actuated after, optimizer switch is turned off by state by optimizer controller, so as to real
It now starts shooting security mode function；
Before St2, grid-connected inverters are ready, the control module control wake-up switch of inverter is turned off state；It is inverse
Become device it is grid-connected it is ready after, be closed wake-up switch so that wake up power supply for the second capacitance of optimizer provide initial start knowledge
Other voltage；
St3, second voltage sensor detection initial start identification voltage；
On initial start identification voltage value, using be no more than inverter work allow maximum input voltage for select according to
According in general, in order to simplify design, being chosen as some voltage value less than inverter minium operation voltage；
It is (such as small no longer than 2 that St4, optimizer controller judge whether initial start identification voltage maintains preset time
When time)；
In the case where optimizer controller judges that initial start identification voltage maintains preset time, into St5；
In the case where judging that initial start identification voltage fails to keep preset time, continue St3 steps；Other real
It applies in mode, in the case of can also failing to keep preset time judging initial start identification voltage, then stops power generation process；
St5, optimizer controller control optimizer switch are placed in closure conducting state, so as to fulfill photovoltaic generating system
Safety wakes up；
St6, photovoltaic generation is carried out.
By the above process as it can be seen that the main power energy flow direction of photovoltaic generating system is：Photovoltaic panel → optimizer → inverse
Become device → power grid, the maximal power tracing (Maximum Power Tracking) of photovoltaic string location is performed by inverter.Photovoltaic
Panel act as by solar day shine luminous energy be converted into direct current energy；Inverter act as tracking and maximizes photovoltaic string list
The dc power of member exports and direct current energy is reverse into AC energy so as to be incorporated into power grid；Optimizer act as root
The energy channel between photovoltaic string location and inverter and the direct current for exporting photovoltaic string location are opened or cut off according to needs
Gas parameter (such as voltage, current value) is transformed into the effective range that inverter can receive.
The purpose of design of St1 steps is mainly the safety of installation personnel when considering installation operation, if optimizer powers on
Optimizer switch is not full-gear after starting, and is not switched in photovoltaic battery panel, then installation personnel has what is be electrically shocked
Danger, therefore it is required that just exporting photovoltaic cell face after completing photovoltaic battery panel and inverter is installed and the two connects successfully
The power of plate.
As shown in figure 5, in other embodiments of the invention, following process can also be increased：
St7, using embodiment one optimizer when, the power transmission using the 3rd current sensor inspection optimization device is led to
The electric current in road (when using the optimizer of embodiment two, is detected respectively using the first current sensor and the second current sensor
The electricity of optimizer power transmission passage is calculated according to the testing result of two current sensors for branch current, optimizer controller
Stream)；
Optimizer controller judges whether the electric current conforms to a predetermined condition；Specifically, optimizer controller judges the electric current
Whether it is reduced under pre-set current value；
In the case where judging that the electric current is less than pre-set current value, into St8；
In the case where judging that the electric current is not less than preset value, then continue St6；
St8, optimizer controller control optimizer switch are turned off state.
The electric current of optimizer power transmission passage is less than pre-set current value, which represents photovoltaic string generated output less than pre-
If there is abnormal operating state, it is necessary to which inverter stopping is generated electricity by way of merging two or more grid systems, so as to fulfill extremely low power rating, inversion in performance number
Function is rapidly switched off under the states such as device exception and power grid are abnormal.
It is possible that extremely low power rating, the situation of inverter exception is including inverse when in the morning and evening, light is weaker
Become device damage, inverter overheat protector, inverter short circuit overvoltage protection, inverter input overvoltage etc., power grid abnormality bag
Include that grid cut-off, network voltage are excessively high, network voltage is excessively low.
As shown in fig. 6, in other embodiments of the invention, following process can also be increased：
St9, the first voltage (electricity of photovoltaic battery panel by first voltage sensor inspection optimization device input terminal busbar
Pressure, the i.e. input voltage of optimizer), pass through the second voltage (optimization of second voltage sensor inspection optimization device output terminal busbar
The output voltage of device), by the electric current of the 3rd current sensor inspection optimization device power transmission passage (using embodiment two
During optimizer, distinguish detection branch electric current using the first current sensor and the second current sensor, optimizer controller according to
The electric current of optimizer power transmission passage is calculated in the testing result of two current sensors)；
By the electric current of first voltage, second voltage and optimizer power transmission passage and default arcing state electrical property feature
(voltage/current feature) compares；
If the electric current of first voltage, second voltage optimizer power transmission passage and default arcing state electrical property feature phase
Meet, then into St10；
If the electric current of first voltage, second voltage and optimizer power transmission passage and default arcing state electrical property feature
It is inconsistent, then continue St6；
St10, the optimizer switch of control optimizer are turned off state, so as to fulfill arcing turn-off function.
The output current of optimizer can be presented the waveform of pulses under arcing state, the voltage of optimizer be also present with compared with
Big ripple, therefore the present embodiment judges whether system arcing occurs by monitoring voltage/current characteristic, and judging that arcing goes out
The power output of optimizer is turned off in the case of existing.
In other embodiments of the invention, the above process can also be designed to a complete flow, walked in detail
Suddenly see description above, so it will not be repeated.
In the embodiment further optimized, at least one bypass is accessed between the positive negative output busbar of optimizer
(Bypass) diode, break down inside corresponding photovoltaic battery panel or optimizer or photovoltaic battery panel by shading and
Can not output power when, bypass diode plays the role of afterflow, so as to fulfill bypass functionality and power optimization function.
In the circuit of the present embodiment photovoltaic generating system, output and the bypass diode of optimizer are connected in parallel,
Under conditions of optimizer is operated in and normally has power output, output voltage is more than bypass diode forward conduction voltage, bypass
Diode is in cut-off state.In distributed usage scenario, multiple photovoltaic panels conspire to create that (configuration of each panel is respective excellent
Change device) it exports to inverter power supply, when optimizer inactivity exports, i.e., the output voltage of optimizer is 0, due to this optimizer
Output is exported with other panel optimizers and is in series, and the output voltage of other optimizers can Non voltage output therefore optimizer
Bypass diode provide forward bias voltage turn it on, so as to fulfill bypass afterflow effect.
The photovoltaic generating system of the present invention and photovoltaic generation control method, using strong signal between inverter and optimizer
Realize state recognition communication, overcome weak electric signal communications in the prior art is easily apart from short, communication robustness
Power conversion noise and surrounding enviroment noise jamming and the shortcomings that high communications cost in system, can save optimizer and optimizer
Between and the special weak electric signal communication module between optimizer and inverter, distributed photovoltaic power generation system can be significantly reduced
The communications cost of system.
The design for waking up power supply and wake-up switch and the detection scheme to initial start identification voltage, inverter with
Low cost, long range, reliable and stable communication are realized between optimizer, and the wake-up (Wake of system can be performed well
Up, Start Up) function.
By the monitoring to current/voltage size and dynamic change characterization in optimizer, the exception of inverter can be identified
The arcing state that state and system occur, and perform safe shutdown (Shutdown, Shut-off) function；It is exported in optimizer female
Increase bypass diode between line, the optimization output power function of photovoltaic string is furthermore achieved.
Use above specific case is illustrated the present invention, is only intended to help to understand the present invention, not limiting
The system present invention.For those skilled in the art, thought according to the invention can also be made several simple
It deduces, deform or replaces.
Claims (10)
1. a kind of optimizer, which is characterized in that
Including anode branch (101), cathode branch (102), first voltage sensor (131), the first capacitance (151), the second electricity
Pressure sensor (132), the second capacitance (152), optimizer switch (12), optimizer controller (11) and current sensor mould
Block；
The optimizer controller is connected with the optimizer Switch Communication；
The current sensor module be the 3rd current sensor (143), between the anode branch and the cathode branch according to
Secondary parallel connection first voltage sensor, the first capacitance, second voltage sensor and the second capacitance；
The optimizer switch is arranged at the anode branch road between first capacitance and the second voltage sensor；
3rd current sensor is arranged at the first voltage sensor or first capacitance and is passed with the second voltage
Cathode branch road between sensor or second capacitance；
Alternatively, the current sensor module be the first current sensor (141) and the second current sensor (142), it is described just
First voltage sensor in parallel, the first capacitance, the second capacitance and second voltage pass successively between pole branch and the cathode branch
Sensor；
First current sensor is arranged at the anode branch between the optimizer electrode input end and optimizer switch
On the road；
The optimizer switch is arranged at the anode branch road between first capacitance and second capacitance；
Second current sensor is arranged at the anode branch road between the optimizer switch and the optimizer output terminal.
2. optimizer as described in claim 1, which is characterized in that
Further include at least one bypass diode (16)；
The bypass diode is parallel between the anode branch of the optimizer output terminal and cathode branch.
3. a kind of photovoltaic generating system, which is characterized in that
Including photovoltaic string location (01), inverter (02), wake up power supply (03) and wake-up switch (04)；
The photovoltaic string location draws anode transmission line (011) and cathode transmission line (012), the anode transmission line with
The cathode transmission line is introduced by the input terminal of the inverter and drawn from the output terminal of the inverter；
The wake-up power supply and the inverter parallel；
The wake-up switch is arranged in the parallel branch of the wake-up power supply and the inverter.
4. system as claimed in claim 3, which is characterized in that
The positive pole circuit (031) that the wake-up power supply is drawn from its input terminal is connected to the inverter input terminal one side
Anode transmission line, it is defeated that the positive pole circuit (033) that the wake-up power supply is drawn from its output terminal is connected to the inverter
The anode transmission line of outlet one side；
The power cathode circuit (032) that the wake-up power supply is drawn from its input terminal is connected to the inverter input terminal one side
Cathode transmission line, it is defeated that the power cathode circuit (034) that the wake-up power supply is drawn from its output terminal is connected to the inverter
The cathode transmission line of outlet one side；
The wake-up switch is arranged at the wake-up power supply from the power positive line road that its input terminal is drawn；
The photovoltaic string location includes at least one set of photovoltaic panel (20) and optimizer (10)；
The optimizer uses optimizer as claimed in claim 1 or 2；
In at least one set photovoltaic panel and optimizer, each group photovoltaic panel is series relationship with optimizer；
The anode branch of the optimizer input terminal one side is connected to the cathode output end of the photovoltaic panel；
The cathode branch of the optimizer input terminal one side is connected to the cathode output end of the photovoltaic panel；
In the photovoltaic string location, drawn by anode branch as anode transmission line, by cathode branch as cathode transmission line
Pass goes out.
5. system as claimed in claim 4, which is characterized in that
At least one set photovoltaic panel includes the first photovoltaic panel, the first optimizer, the second photovoltaic panel, second with optimizer
Optimizer ... N photovoltaic panels, N optimizers；
The anode branch of the first optimizer output terminal one side is drawn as anode transmission line, the anode of input terminal one side
Branch is connected to the cathode output end of first photovoltaic panel, and the cathode branch of input terminal one side is connected to first light
The cathode output end of underlying surface plate, the cathode branch of output terminal one side are connected to the cathode output end of second optimizer；
The anode branch of the second optimizer input terminal one side is connected to the cathode output end of second photovoltaic panel, defeated
Enter to hold the cathode branch of one side to be connected to the cathode output end of second photovoltaic panel, the cathode branch of output terminal one side connects
It is connected to the output terminal of the 3rd optimizer；
……
The anode branch of the N optimizer input terminals one side is connected to the cathode output end of the N photovoltaic panels, input
The cathode branch of end one side is connected to the cathode output end of the N photovoltaic panels, the cathode branch conduct of output terminal one side
Cathode transmission line is drawn；
Wherein, N is more than or equal to 1.
6. system as described in claim 4 or 5, which is characterized in that
The inverter be used for it is grid-connected it is ready after, the wake-up switch is controlled to be closed so that the wake-up switch is institute
It states optimizer and initial start identification voltage is provided；
The optimizer controller is described just for controlling the first voltage sensor or second voltage sensor detection
Begin to start identification voltage, judge whether the initial start identification voltage conforms to a predetermined condition；Judging the initial start knowledge
In the case that other voltage conforms to a predetermined condition, the optimizer of the optimizer is controlled to switch and is placed in conducting state.
7. system as claimed in claim 6, which is characterized in that
The optimizer controller is additionally operable to the power transmission that its internal current sensor set is controlled to detect the optimizer
The electric current of passage, judges whether the electric current conforms to a predetermined condition；
In the case where judging that the electric current does not meet predetermined condition, the optimizer of the optimizer is controlled to switch and is turned off shape
State.
8. system as claimed in claim 6, which is characterized in that
The optimizer controller be additionally operable to control the first voltage sensor, the second voltage sensor and/or its in
The current sensor that portion is set detects the first voltage of the input terminal busbar of the optimizer, the output terminal of the optimizer respectively
The electric current of the second voltage of busbar and/or the optimizer power transmission passage；
By the electric current of the first voltage, the second voltage and/or the optimizer power transmission passage and default arcing
State electrical property feature compares；
If the electric current of the first voltage, the second voltage and/or the optimizer power transmission passage and default arcing
State electrical property feature is consistent, then the optimizer of the optimizer is controlled to switch and is turned off state.
9. a kind of photovoltaic generation control method is applied to such as claim 3-7 any one of them photovoltaic generating systems, spy
Sign is, including：
The optimizer of the optimizer is controlled to switch machine and is turned off state；
It controls the grid-connected inverters ready, is closed the wake-up switch so that the wake-up switch is the optimizer
Initial start identification voltage is provided；
The initial start identification voltage is detected, judges whether the initial start identification voltage conforms to a predetermined condition；
In the case where judging that the initial start identification voltage conforms to a predetermined condition, the optimizer of the optimizer is controlled to switch
It is placed in conducting state.
10. method as claimed in claim 9, which is characterized in that
It further includes：
The electric current of the power transmission passage of the optimizer is detected, judges whether the electric current conforms to a predetermined condition；
In the case where judging that the electric current does not meet predetermined condition, the optimizer of the optimizer is controlled to switch and is turned off shape
State；
And/or it further includes：
Detect the first voltage of the input terminal busbar of the optimizer, the optimizer output terminal busbar second voltage and/
Or the electric current of the optimizer power transmission passage；
By the electric current of the first voltage, the second voltage and/or the optimizer power transmission passage and default arcing
State electrical property feature compares；
If the electric current of the first voltage, the second voltage and/or the optimizer power transmission passage and default arcing
State electrical property feature is consistent, then the optimizer of the optimizer is controlled to switch and is turned off state.
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