CN207968420U - A kind of optimizer and photovoltaic generating system - Google Patents
A kind of optimizer and photovoltaic generating system Download PDFInfo
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- CN207968420U CN207968420U CN201721850285.3U CN201721850285U CN207968420U CN 207968420 U CN207968420 U CN 207968420U CN 201721850285 U CN201721850285 U CN 201721850285U CN 207968420 U CN207968420 U CN 207968420U
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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
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Abstract
The application provides a kind of optimizer comprising positive branch, cathode branch, first voltage sensor, the first capacitance, second voltage sensor, the second capacitance, optimizer switch, optimizer controller and third current sensor or the first current sensor and the second current sensor.The application also provides a kind of photovoltaic generating system comprising photovoltaic string location, wakes up power supply and wake-up switch at inverter；Photovoltaic string location includes at least one set of photovoltaic panel and above-mentioned optimizer.The technical solution of the application overcomes weak electric signal communications in the prior art and is easy by the high disadvantage of power conversion noise in system and surrounding enviroment noise jamming and communications cost 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 utility model is related to field of photovoltaic power generation, and in particular to a kind of optimizer and photovoltaic generating system.
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 constituted；Power carrier (PLC) can be increased in system, between optimizer and inverter or wireless (Wireless) is logical
Letter module is communicated, that is, uses the communication pattern of weak signal, and transmission range is shorter, and communication robustness is also easy by 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 are communicated, and it is short, logical that there is also transmission ranges
Believe that robustness is easy by the high defect of power conversion noise in system and surrounding enviroment noise jamming, communications cost.
Utility model content
According to the application's in a first aspect, providing a kind of optimizer comprising positive 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 connect with the optimizer Switch Communication；The current sensor module passes for third 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 set to the anode between first capacitance and the second voltage sensor
Branch road；The third current sensor is set to 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 positive branch road that the first current sensor is set between the optimizer electrode input end and optimizer switch.
The optimizer switch is set to the road of the positive branch between first capacitance and second capacitance；Described
Two current sensors are set to the positive branch road between the optimizer switch and the optimizer output end.
According to second aspect, provide a kind of photovoltaic generating system comprising photovoltaic string location, inverter, wake up power supply and
Wake-up switch；The photovoltaic string location draws positive 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 is drawn from the output end of the inverter；The wake-up power supply with
The inverter parallel；The wake-up switch is set in the parallel branch of the wake-up power supply and the inverter.
Using the technical solution of the utility model, in photovoltaic generating system, using strong signal in inverter and optimizer
Between realize state recognition communication, overcome in the prior art weak electric signal communications apart from it is short, communication robustness be easy by
The disadvantage high to power conversion noise in system and surrounding enviroment noise jamming and communications cost, can save optimizer with it is excellent
Change device between and the special weak electric signal communication module between optimizer and inverter, can significantly reduce distributed photovoltaic hair
The communications cost of electric system.
Description of the drawings
Fig. 1 is the optimizer structural schematic diagram of embodiment one；
Fig. 2 is the optimizer structural schematic 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 implementation mode
The utility model is described in further detail below by specific implementation mode combination attached drawing.It is wherein different to implement
Similar component uses associated similar element numbers in mode.In the following embodiments, many datail descriptions are
In order to enable the application can be better understood.However, those skilled in the art can be without lifting an eyebrow recognize, which part
Feature is dispensed in varied situations, or can be substituted by other elements, material, method.In some cases,
Some relevant operations of the application are there is no display in the description or describe, this is the core in order to avoid the application
It is flooded by excessive description, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary,
They can completely understand relevant operation according to the general technology knowledge of description and this field in specification.
It is formed respectively in addition, feature described in this description, operation or feature can combine 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 sequence exchange or adjustment seen.Therefore, the various sequences in the description and the appended drawings are intended merely to clearly describe a certain
A embodiment is not meant to be necessary sequence, 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 sequence 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 comprising positive 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), optimizer controller 11 and third current sensor 143.
Optimizer controller 11 is communicated to connect with optimizer switch 12, and conducting wire may be used or wirelessly wait communication modes, excellent
The operating status for changing device switch 12 sends out control instruction to control by optimizer controller 11.
First voltage sensor 131 in parallel, the first capacitance 151, successively between positive branch 101 and cathode branch 101
Two voltage sensors 132, the second capacitance 152, bypass diode 16；Optimizer switch 12 is set to the first capacitance 151 and second
On positive branch 101 between voltage sensor 132.
Third current sensor 143 is set to the cathode branch between the first capacitance 151 and second voltage sensor 132
On 102.In the utility model others embodiment, those skilled in the art pass according to actual design needs, third electric current
Sensor can also be set to the cathode branch road between the first capacitance and the second capacitance；Alternatively, being set to first voltage sensor
Cathode branch road between second voltage sensor；Alternatively, being set to negative between first voltage sensor and the second capacitance
Pole branch 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 constitutes, it can also be by DC-DC power converter (such as Buck, Boost, Buck-Boost) structure
At.
Voltage sensor may be used electric resistance partial pressure mode and realize, can also use voltage induced chip；Current sensor
Resistance may be used and the scheme of operational amplifier collocation design is realized, or use 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 the first capacitance is not arranged in optimizer, the voltage of photovoltaic panel will appear ceaselessly saltus step, be added
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：
It is illustrated in figure 2 the optimizer 100 of the present embodiment comprising positive 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
12, optimizer controller 11 and the first current sensor 141, the second current sensor 142.
Optimizer controller 11 is communicated to connect with optimizer switch 12；Between positive 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 set on the positive branch 101 of optimizer electrode input end and optimizer switch 12 (specifically for example
Can be between optimizer electrode input end and first voltage sensor 131 or first voltage sensor 131 and the first capacitance
On positive branch 101 between 151 or between the first capacitance 151 and optimizer switch 12)；Optimizer switch 12 is set to
On positive branch 101 between first capacitance 151 and the second capacitance 152；Second current sensor 142 is set to optimizer switch
(for example can be specifically optimizer switch 12 and the second capacitance on positive 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 positive 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 as embodiment one, and so it will not be repeated.
Embodiment three：
It is illustrated in figure 3 the distributed photovoltaic power generation system of the present embodiment comprising 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 positive transmission line 011 and cathode transmission line 012, positive transmission line 011 and negative
Pole transmission line 012 is introduced by the input terminal of inverter 02 and is drawn from the output end 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 set to, wakes up the branch in parallel with inverter 02 of power supply 03
On the road.
Specifically, it wakes up the positive pole circuit 031 that power supply 03 is drawn from its input terminal and is connected to 02 input terminal of inverter
The positive transmission line 011 of side wakes up the positive pole circuit 033 that power supply 03 is drawn from its output end and is connected to inverter 02
The positive transmission line 011 of output end 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 side of device, wakes up the power cathode circuit 034 that power supply 03 is drawn from its output end and connect
It is connected to the cathode transmission line 012 of 02 output end side of inverter.
It can be the power supply being separately configured, such as adapter, power module to wake up power supply 03, can also be inverter auxiliary
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
Situation is counted using other power source designs.
Wake-up switch 04, which is set to, 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 constituted.
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 positive branch for changing the electrode input end side of device is connected to the cathode output end of corresponding photovoltaic panel；Each optimizer cathode input
The cathode branch of end 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.
In photovoltaic string location 01, is drawn as positive transmission line by positive branch, transmitted as cathode by cathode branch
Circuit is drawn.
Specifically, multigroup photovoltaic panel and optimizer include the first photovoltaic panel 20, the first optimizer in photovoltaic cells 01
10, the second photovoltaic panel, the second optimizer ... N photovoltaic panels 020, N optimizers 010.
The positive branch 101 of first optimizer, 10 cathode output end side is drawn as positive transmission line 011, anode
The positive branch 101 of input terminal side is connected to the cathode output end of the first photovoltaic panel 20, and negative input 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 side is connected to
The cathode output end of two optimizers；The positive branch of second optimizer electrode input end side is being connected to the second photovoltaic panel just
Pole output end, the cathode branch of negative input side are connected to the cathode output end of the second photovoltaic panel, cathode output
The cathode branch of end side is connected to the 010 electrode input end side of cathode output end ... N optimizers of third optimizer
Positive branch is connected to the cathode output end of N photovoltaic panels 020, and the cathode branch of negative input side is connected to N
The cathode branch of the cathode output end of photovoltaic panel 020, cathode output end side is drawn as cathode transmission line 012；Its
In, N is greater than or equal to 1.
As shown in figure 4, method, that is, the principle for carrying out photovoltaic generation control 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, to real
Now be switched on 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 be the second capacitance of optimizer provide initial start knowledge
Other voltage；
St3, second voltage sensor detection initial start identify voltage；
About initial start identify voltage value, with no more than inverter work allow maximum input voltage be selection 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, can also then stop power generation process in the case where judging that initial start identification voltage fails to keep preset time；
St5, optimizer controller control optimizer switch are placed in closure conducting state, to realize 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 executed by inverter.Photovoltaic
The luminous energy that solar day shines is converted into direct current energy by the acting as of panel；Inverter act as tracking and maximizes photovoltaic string list
The dc power of member exports and direct current energy is reverse into AC energy to be incorporated into power grid；Optimizer act as root
The energy channel between photovoltaic string location and inverter is opened or cuts off according to needs, and the direct current that photovoltaic string location is exported
Gas parameter (such as voltage, current value) is transformed into the effective range that inverter can receive.
The safety of installation personnel when the purpose of design of St1 steps is mainly in view of 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 presence is 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 is connected to successfully
The power of plate.
As shown in figure 5, in the utility model others embodiment, following process can also be increased：
St7, when using the optimizer of embodiment one, it is logical using the power transmission of third current sensor inspection optimization device
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 in optimizer power transmission channel 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 in optimizer power transmission channel is less than pre-set current value, which indicates photovoltaic string generated output less than pre-
If abnormal operating state occurs in performance number, inverter stopping is needed to generate electricity by way of merging two or more grid systems, to realize extremely low power rating, inversion
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 includes inverse when the morning and evening, light was weaker
Become device damage, inverter overheat protector, inverter short circuit overvoltage protection, inverter input overvoltage etc., power grid abnormality packet
Include that grid cut-off, network voltage are excessively high, network voltage is excessively low.
As shown in fig. 6, in the utility model others embodiment, following process can also be increased：
St9, pass through the first voltage (electricity of photovoltaic battery panel of 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 end busbar
The output voltage of device), by the electric current in third current sensor inspection optimization device power transmission channel (using embodiment two
When optimizer, distinguish detection branch electric current using the first current sensor and the second current sensor, optimizer controller according to
The electric current in optimizer power transmission channel is calculated in the testing result of two current sensors)；
By the electric current of first voltage, second voltage and optimizer power transmission channel and preset arcing state electrical property feature
(voltage/current feature) compares；
If first voltage, electric current and the preset arcing state electrical property feature phase in second voltage optimizer power transmission channel
Meet, then enters St10；
If the electric current of first voltage, second voltage and optimizer power transmission channel and preset arcing state electrical property feature
It is inconsistent, then continue St6；
St10, control optimizer optimizer switch be turned off state, to realize arcing turn-off function.
The output current of optimizer will present the waveform of pulses under arcing state, the voltage of optimizer also will appear 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 the utility model others embodiment, the above process can also be designed to a complete flow, in detail
Thin step is seen description above, and so it will not be repeated.
In the embodiment advanced 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, to realize 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) output is to inverter power supply, and 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 thus optimizer
Bypass diode provide forward bias voltage turn it on, to realize bypass afterflow effect.
The photovoltaic generating system and photovoltaic generation control method of the utility model, using strong signal in inverter and optimizer
Between realize state recognition communication, overcome in the prior art weak electric signal communications apart from it is short, communication robustness be easy by
The disadvantage high to power conversion noise in system and surrounding enviroment noise jamming and communications cost, can save optimizer with it is excellent
Change device between and the special weak electric signal communication module between optimizer and inverter, can significantly reduce distributed photovoltaic hair
The communications cost of electric system.
Wake up power supply and wake-up switch design, and to initial start identify voltage detection scheme, inverter with
Low cost, long range, reliable and stable communication are realized between optimizer, and can execute the wake-up (Wake of system 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 execute 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 utility model, is merely used to help understand the utility model, and
Not limiting the utility model.For those skilled in the art of the present invention, the think of according to the utility model
Think, several simple deductions, deformation can also be made or replaces.
Claims (8)
1. a kind of optimizer, which is characterized in that
Including positive 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 connect with the optimizer Switch Communication；
The current sensor module be third current sensor (143), it is described anode branch and the cathode branch between according to
Secondary parallel connection first voltage sensor, the first capacitance, second voltage sensor and the second capacitance；
The optimizer switch is set to the road of the positive branch between first capacitance and the second voltage sensor；
The third current sensor is set to 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；
The anode that first current sensor is set between the optimizer electrode input end and optimizer switch props up
On the road；
The optimizer switch is set to the road of the positive branch between first capacitance and second capacitance；
Second current sensor is set to the positive branch road between the optimizer switch and the optimizer output end.
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 positive branch and cathode branch of the optimizer output end.
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 positive 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 is drawn from the output end of the inverter；
The wake-up power supply and the inverter parallel；
The wake-up switch is set 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 side
Positive transmission line, it is defeated that the positive pole circuit (033) that the wake-up power supply is drawn from its output end is connected to the inverter
The positive transmission line of outlet 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 side
Cathode transmission line, it is defeated that the power cathode circuit (034) that the wake-up power supply is drawn from its output end is connected to the inverter
The cathode transmission line of outlet side；
The wake-up switch is set to the power positive line road that the wake-up power supply is drawn from its input terminal；
The photovoltaic string location includes at least one set of photovoltaic panel (20) and optimizer (10)；
The optimizer uses optimizer as described in claim 1；
For at least one set photovoltaic panel with optimizer, each group photovoltaic panel is series relationship with optimizer；
The positive branch of optimizer input terminal side is connected to the cathode output end of the photovoltaic panel；
The cathode branch of optimizer input terminal side is connected to the cathode output end of the photovoltaic panel；
In the photovoltaic string location, drawn as positive transmission line by positive branch, 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 positive branch of the first optimizer output end side is drawn as positive transmission line, the anode of input terminal side
Branch is connected to the cathode output end of first photovoltaic panel, and the cathode branch of input terminal side is connected to first light
The cathode output end of underlying surface plate, the cathode branch of output end side are connected to the cathode output end of second optimizer；
The positive branch of the second optimizer input terminal side is connected to the cathode output end of second photovoltaic panel, defeated
Enter to hold the cathode branch of side to be connected to the cathode output end of second photovoltaic panel, the cathode branch of output end side connects
It is connected to the output end of third optimizer；
……
The positive branch of N optimizer input terminals side is connected to the cathode output end of the N photovoltaic panels, input
The cathode branch of end side is connected to the cathode output end of the N photovoltaic panels, the cathode branch conduct of output end 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, control the wake-up switch and be closed so that the wake-up switch is institute
It states optimizer and initial start identification voltage is provided；
The optimizer controller is used to control first voltage sensor or the second voltage sensor detection institute of the optimizer
Initial start identification voltage is stated, judges whether the initial start identification voltage conforms to a predetermined condition；Judging described initial
In the case that dynamic identification voltage conforms to a predetermined condition, the optimizer switch for controlling the optimizer is placed in conducting state.
7. system as claimed in claim 6, which is characterized in that
The optimizer controller is additionally operable to control the power transmission that its internal current sensor being arranged detects the optimizer
The electric current in channel, 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 switch for controlling the optimizer 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 of portion's setting detect respectively the first voltage of input terminal busbar of the optimizer, the optimizer output end
The electric current in the second voltage of busbar and/or optimizer power transmission channel；
By the electric current of the first voltage, the second voltage and/or optimizer power transmission channel and preset arcing
State electrical property feature compares；
If the electric current of the first voltage, the second voltage and/or optimizer power transmission channel and preset arcing
State electrical property feature is consistent, then the optimizer switch for controlling the optimizer is turned off state.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054998A (en) * | 2017-12-26 | 2018-05-18 | 深圳古瑞瓦特新能源股份有限公司 | A kind of optimizer, photovoltaic generating system and photovoltaic generation control method |
| CN110460093A (en) * | 2019-08-06 | 2019-11-15 | 丰郅(上海)新能源科技有限公司 | Photovoltaic fission box |
| CN111293678A (en) * | 2018-12-07 | 2020-06-16 | 浙江英达威芯电子有限公司 | Photovoltaic module and control method thereof |
-
2017
- 2017-12-26 CN CN201721850285.3U patent/CN207968420U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054998A (en) * | 2017-12-26 | 2018-05-18 | 深圳古瑞瓦特新能源股份有限公司 | A kind of optimizer, photovoltaic generating system and photovoltaic generation control method |
| CN111293678A (en) * | 2018-12-07 | 2020-06-16 | 浙江英达威芯电子有限公司 | Photovoltaic module and control method thereof |
| CN110460093A (en) * | 2019-08-06 | 2019-11-15 | 丰郅(上海)新能源科技有限公司 | Photovoltaic fission box |
| CN110460093B (en) * | 2019-08-06 | 2023-03-24 | 丰郅(上海)新能源科技有限公司 | Photovoltaic split box |
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