CN208572026U - A kind of photovoltaic combiner box - Google Patents
A kind of photovoltaic combiner box Download PDFInfo
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- CN208572026U CN208572026U CN201820955046.2U CN201820955046U CN208572026U CN 208572026 U CN208572026 U CN 208572026U CN 201820955046 U CN201820955046 U CN 201820955046U CN 208572026 U CN208572026 U CN 208572026U
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- control unit
- combiner box
- photovoltaic combiner
- circuit
- photovoltaic
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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
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Abstract
The utility model relates to a kind of photovoltaic combiner boxes, including control unit, signal acquisition circuit and power module, the signal acquisition circuit, power module are connected with control unit respectively, described control unit is additionally provided with the communication interface for communicating with host computer, the photovoltaic combiner box further includes Bluetooth adapter and 485 interface circuits, and the Bluetooth adapter is connect by 485 interface circuits with control unit.By configuring Bluetooth adapter in photovoltaic combiner box, the configuration when being unable to close contact photovoltaic combiner box to header box is realized, solves photovoltaic combiner box field adjustable difficulty in the prior art, the not high problem of working efficiency.
Description
Technical field
The utility model relates to a kind of photovoltaic combiner boxes, belong to photovoltaic art.
Background technique
With the development of economy, human society is increasing to the demand of electric energy, and solar energy is as a kind of reproducible
Clean energy resource obtains the approval of more and more people.For photovoltaic plant safe operation, need to electric in photovoltaic module each in power station
Stream, voltage are controled and monitored, while also facilitating the maintenance and maintenance in power station, therefore to increase light in photovoltaic generating system
Lie prostrate collector-shoe gear.
Currently, monitoring management of most header boxs to electric parameter and environmental parameter, main to be handled by two parts: first is that
Increase LED and key in the control module, is to show ginseng related to header box address and communication baud rate etc. is arranged
Number, second is that the data of relevant device in header box were transmitted to host computer by Ethernet after address was set by key,
Monitoring application program is installed in computer end each electric parameter, environmental parameter in all header boxs etc. are monitored and are managed.
In the above method, in order to make the monitoring system in header box access power station, in first installation, commissioning staff needs to beat
It opens each cabinet and carries out the relevant parameters such as manual setting address and communication baud rate.But many photovoltaic site environments compare
Badly, there are fish pond, desert, hillside and field etc., in some cases since field condition limits, commissioning staff can not be touched
Header box, or even need to be debugged by some tools, this also increases fortune to the great difficulty of field adjustable band
Tie up cost.
Utility model content
The utility model aim is to provide a kind of photovoltaic combiner box, limit for solving because of field condition, commissioning staff
Can not close contact header box and the difficult problem of bring debugging, realize to photovoltaic combiner box address, communication baud
The relevant parameters such as rate it is remotely located, reduce debugging difficulty, while improving O&M efficiency.
To achieve the goals above, the technical solution of the utility model are as follows: a kind of photovoltaic combiner box, i.e. photovoltaic combiner box side
Case one: including control unit, signal acquisition circuit and power module, the signal acquisition circuit, power module respectively with control
Unit is connected, and described control unit is additionally provided with the communication interface for communicating with host computer, and the photovoltaic combiner box further includes
Bluetooth adapter and 485 interface circuits, the Bluetooth adapter are connect by 485 interface circuits with control unit.
Photovoltaic combiner box scheme two: including electricity in the signal acquisition circuit on the basis of photovoltaic combiner box scheme one
Sample circuit, current sampling circuit and A/D conversion chip are pressed, the voltage sampling circuit, current sampling circuit turn with A/D respectively
It changes chip to be connected, the A/D conversion chip is connect with control unit.
Photovoltaic combiner box scheme three: on the basis of photovoltaic combiner box scheme two, the current sampling circuit and A/D are converted
Two panels multi-channel analog channel selection switch is additionally provided between chip, for selecting collected Multi-current Sampling signal
Logical processing.
Photovoltaic combiner box scheme four: on the basis of photovoltaic combiner box scheme two, in the signal acquisition circuit, the electricity
Pressure sample circuit by the sampling resistor of 10 1M Ω divider resistances, 1 2K Ω that is sequentially connected in series in photovoltaic tandem output end and
RC filter circuit composition；The pure copper sheet that the current sampling circuit is 1m Ω by several resistance values that photovoltaic group string input terminal is arranged
Composition.
Photovoltaic combiner box scheme five: on the basis of photovoltaic combiner box scheme one, the photovoltaic combiner box is additionally provided with number
According to storage unit, the data storage cell is connect with control unit.
Photovoltaic combiner box scheme six: on the basis of photovoltaic combiner box scheme one, SPI is additionally provided in described control unit
Interface, described control unit are connect by SPI interface with signal acquisition circuit.
The beneficial effects of the utility model are:
1, it by showing the LED in traditional header box and key changes Bluetooth adapter into, realizes cannot be closely
When contacting photovoltaic combiner box, the address of header box is configured, so that related data is uploaded to host computer；
2, simple, the versatile feature of the apparatus structure, it can be achieved that photovoltaic combiner box remote operation；
3, facilitate operation of the header box commissioning staff to header box, improve the working efficiency of header box operation maintenance personnel, thus
Reduce O&M cost.
Detailed description of the invention
Fig. 1 is header box inner connecting structure figure in the utility model photovoltaic combiner box embodiment；
Fig. 2 is the structural principle of photovoltaic tandem electric current, voltage sampling circuit in the utility model photovoltaic combiner box embodiment
Figure；
Fig. 3 is the structure principle chart of optical coupling isolation circuit in the utility model photovoltaic combiner box embodiment；
Fig. 4 is the structural principle of RS485 interface circuit and surging prevention in the utility model photovoltaic combiner box embodiment
Figure.
Specific embodiment
The technical solution of the utility model is described further in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, the utility model proposes a kind of photovoltaic combiner box, including control unit, signal acquisition circuit and
Power module, the signal acquisition circuit, power module are connected with control unit respectively, and described control unit, which is additionally provided with, to be used for
The communication interface communicated with host computer, the photovoltaic combiner box further include Bluetooth adapter and 485 interface circuits, and the bluetooth is suitable
Orchestration is connect by 485 interface circuits with control unit.
Signal acquisition circuit 3 includes voltage sampling circuit 31 and current sampling circuit 32, and voltage sampling circuit 31 connects light
Busbar connector is lied prostrate, it further includes A/D that current sampling circuit 32, which connects photovoltaic tandem for obtaining the electric current of each branch in photovoltaic tandem,
Conversion chip, for the voltage of acquisition, current signal to be converted to digital signal and are uploaded to control unit.
Carried out data transmission between Bluetooth adapter 43 and control unit 41 by 485 interface circuits 42, bluetooth adaptation
Device 43 can convert Bluetooth signal for the processed digital signal of control unit 41；Staff only need to be in Intelligent mobile equipment
The middle corresponding application program of installation, opens its bluetooth port above-mentioned Bluetooth signal ready to receive, and set header box address
Etc. parameters, while electric parameters and case inner breaker, fuse, the lightning protection such as each road Current Voltage of header box, generated energy can be monitored
The on-off states such as device.
The photovoltaic combiner box is additionally provided with data storage cell, and the data storage cell is connect with control unit, uses
In the data of storage control unit processing, for host computer inquiry.
As shown in Fig. 2, this gives the specific structures of above-mentioned signal acquisition circuit.Photovoltaic string described in the present embodiment
16 tunnel tandems are classified as, the positive bus and negative bus of photovoltaic combiner box are respectively connected to；Sampled voltage is usually no more than 1000V,
10 1M Ω divider resistance Rl and 1 2K Ω sampling electricity are sequentially connected in series in photovoltaic group string output end in design voltage sample circuit
Hinder Rsv.Voltage sampling signal is derived from the both ends Rsv close to cathode, formed after being handled by RC filter circuit sampled signal Vin+,
Vin- inputs to AD conversion chip.Group string electric current is generally 10A or so, it flows through one before it will flow into photovoltaic group string cathode
Piece resistance value is the pure copper sheet Rsi of 1m Ω and then generates group string current sampling signal all the way.For example, in order to realize 16 tunnel group string electric currents
Sampling, the current sampling signal of branch 01-08 and branch 09-16 passes through two panels multi-channel analog channel selection switch respectively
Two current sampling signal input terminals of A/D conversion chip CS5480 are conveyed to after the gating processing of ADG707 again.This two panels
ADG707 receives the excitation of channel selecting signal A, B, C that STM32 is sent.All due to voltage sampling signal and current sampling signal
It is derived from the cathode of photovoltaic group string, and signal ground is connected at the middle position i.e. 1.65V of 3.3V power supply by voltage follower,
Therefore this circuit can sample the group string voltage and current in positive and negative both direction.
Photovoltaic combiner box described in the utility model further includes power module, which connects DC bus, by straight
It flows bus and power supply is provided, the other end connects control unit, powers for control unit.As other embodiments, the power supply mould
Block can also be made of DC bus, directly be powered control unit connection DC bus.
Light-coupled isolation pipe is selected to carry out electrical isolation (as shown in Figure 3) between the signal acquisition circuit and control unit,
Voltage, current sampling circuit, described control unit 41, each self-contained of 485 interface circuit in the signal acquisition circuit 3 return
Road, independently-powered, the signal acquisition circuit and control unit pass through the transmission that the SPI interface in control unit realizes signal；
As shown in figure 4, using four surging prevention measures in RS485 interface circuit described in the utility model；One
It is that communication interface is provided with ceramic gas discharge tube over the ground；Second is that respectively adding a clamp voltage between any two in signaling interface
For 10.3V and TVS pipe that peak inrush current is 58.3A；Third is that interface circuit respectively adds one on the access that signal flows through
Resistance value is the wafer resistance in 10 Europe；Fourth is that interface chip uses isolating chip, it supports two sets of independent power-supply system power supplies, institute
It states isolating chip and selects ISO3082DW.
By technical solution described in the utility model, the bluetooth that Bluetooth adapter issues is received using external smart equipment
Signal, and carry out signal with Bluetooth adapter and mutually pass, the parameters such as header box address can be set, while detectable header box is each
The on-off states such as the electric parameters such as road Current Voltage, generated energy and case inner breaker, fuse, lightning protection device.Specifically, institute
Stating external smart equipment is smart phone, PC machine, iPad etc..
The utility model is described above in conjunction with attached drawing, but the utility model be not limited to it is above-mentioned specific
Embodiment can also make various transformation when not departing from the utility model aims and scope of the claimed protection
And equivalent substitute, these are belonged within the protection scope of the utility model.
Claims (6)
1. a kind of photovoltaic combiner box, including control unit, signal acquisition circuit and power module, the signal acquisition circuit, electricity
Source module is connected with control unit respectively, and described control unit is additionally provided with the communication interface for communicating with host computer, special
Sign is that the photovoltaic combiner box further includes Bluetooth adapter and 485 interface circuits, and the Bluetooth adapter passes through 485 interfaces
Circuit is connect with control unit.
2. photovoltaic combiner box according to claim 1, which is characterized in that include voltage sample in the signal acquisition circuit
Circuit, current sampling circuit and A/D conversion chip, the voltage sampling circuit, current sampling circuit respectively with A/D conversion chip
It is connected, the A/D conversion chip is connect with control unit.
3. photovoltaic combiner box according to claim 2, which is characterized in that the current sampling circuit and A/D conversion chip
Between be additionally provided with two panels multi-channel analog channel selection switch, for collected Multi-current Sampling signal to be carried out at gating
Reason.
4. photovoltaic combiner box according to claim 2, which is characterized in that in the signal acquisition circuit, the voltage is adopted
Sample circuit is filtered by the sampling resistor and RC of the 10 1M Ω divider resistances, 1 2K Ω that are sequentially connected in series in photovoltaic tandem output end
Wave circuit composition；The pure copper sheet group that the current sampling circuit is 1m Ω by several resistance values that photovoltaic group string input terminal is arranged
At.
5. photovoltaic combiner box according to claim 1, which is characterized in that the photovoltaic combiner box is additionally provided with data storage
Unit, the data storage cell are connect with control unit.
6. photovoltaic combiner box according to claim 1, which is characterized in that SPI interface is additionally provided in described control unit,
Described control unit is connect by SPI interface with signal acquisition circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820955046.2U CN208572026U (en) | 2018-06-20 | 2018-06-20 | A kind of photovoltaic combiner box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820955046.2U CN208572026U (en) | 2018-06-20 | 2018-06-20 | A kind of photovoltaic combiner box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208572026U true CN208572026U (en) | 2019-03-01 |
Family
ID=65487459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820955046.2U Active CN208572026U (en) | 2018-06-20 | 2018-06-20 | A kind of photovoltaic combiner box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208572026U (en) |
-
2018
- 2018-06-20 CN CN201820955046.2U patent/CN208572026U/en active Active
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