CN106712096A - Photovoltaic power generation monitoring system based on string cable communication and single-point current detection - Google Patents
Photovoltaic power generation monitoring system based on string cable communication and single-point current detection Download PDFInfo
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- CN106712096A CN106712096A CN201710068319.1A CN201710068319A CN106712096A CN 106712096 A CN106712096 A CN 106712096A CN 201710068319 A CN201710068319 A CN 201710068319A CN 106712096 A CN106712096 A CN 106712096A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 238000004891 communication Methods 0.000 title claims abstract description 24
- 238000010248 power generation Methods 0.000 title abstract description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000429 assembly Methods 0.000 abstract 2
- 239000000306 component Substances 0.000 description 22
- 230000005540 biological transmission Effects 0.000 description 7
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
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- H02J3/383—
-
- 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
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
-
- 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
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Abstract
The invention discloses a photovoltaic power generation monitoring system based on string cable communication and single-point current detection, and the system comprises photovoltaic assemblies, assembly performance detection modules, a string data receiver, an inverter, a power grid, a string cable, connection lines, and a DC bus. Every N photovoltaic assemblies are sequentially connected in series to form a photovoltaic assembly string, and the positive and negative output ends of each photovoltaic assembly are in parallel connection with one assembly performance detection module through one connection line. The positive and negative output ends of a photovoltaic string are connected with the input end of the string data receiver through the string cable to form a photovoltaic monitoring string which can achieve the monitoring. The beneficial effects of the invention are that the system saves the cost, reduces the power loss, improves the power generation efficiency of a power plant, can achieve the stable communication, achieves the monitoring according to the array lay out the power plant, and can visually and clearly reflect the operation condition of the power plant.
Description
Technical field
It is specially a kind of to be got lines crossed cable communication and single based on group the present invention relates to a kind of performance monitoring of photovoltaic generating system
The photovoltaic generation monitoring system of point current detecting, belongs to distributed photovoltaic and generates electricity by way of merging two or more grid systems field.
Background technology
With the shortage and the pollution of environment of the energy, solar energy is more next as a kind of renewable, free of contamination green energy resource
More it is valued by the people, parallel network power generation technology is able to fast development.For traditional photovoltaic plant, as shown in figure 1, multiple
Component forms the group string of certain voltage scope by series connection, and several similar group strings forming array that is together in parallel again accesses inversion
Device, the component count of photovoltaic array determines that inverter is unified to array by the rated value such as power, voltage of inverter
MPPT is controlled.
The many factors influence such as the operation in power station is contaminated, weather, barrier are blocked, defective mounting and component are damaged.
The same group of component series connection of string, the equal formation series coupled of electric current in system；With the group connection in series-parallel of an array, voltage
Equal formation parallel coupled.If a certain component causes electric current to decline because damaging in group string, because series coupled electric current is equal,
Other component electric currents with group string will necessarily decline；If the problematic maximum work caused with other group strings of certain group string in array
Rate point voltage is different, because parallel coupled voltage is equal, all groups of MPPT of string cannot be just realized with array.While existing system
The monitoring of inverter can only be realized, and problem, this side whether there is come component in judgement system by the monitoring to inverter
Method hardly results in accurately judgement, even if judging the problematic lockout issue component also being difficult to promptly and accurately, wastes substantial amounts of
Man power and material.
Based on above reason, the performance monitoring for each component in photovoltaic plant is just extremely important, existing generally to do
Method is exactly to access monitor in the outside of each component, as shown in Fig. 2 inspection of the monitor comprising voltage, electric current and temperature
Survey, at the same by wireless communication module transfer data to host computer be analyzed again with treatment, realize the monitoring in power station.
There is problems with this mode：
1st, because each component will complete current detecting, due to cost considerations, resistance detection electric current can be typically used, so
Just have many sampling resistors to be connected on group string, increased power attenuation, reduce conversion efficiency.
2nd, due to needing to detect electric current, monitor is difficult to be directly accessed existing assembly junction box, is needed if accessing
Terminal box is redesigned, increases development cost.
3rd, because wireless telecommunications are influenceed larger by site environment, the data transfer of stabilization is difficult to realize, is suffered from this, together
One group of monitor of string is difficult to realize being carried out according to power station array layout figure in the presence of networking possibility together, host computer is unable to
Monitoring, it is impossible to the ruuning situation in simple and clear reflection power station.
4th, in wireless telecommunications, either the communication modes price such as ZigBee, bluetooth, WM-Bus is all higher, for power station
Investment or improvement cost have burden.
The content of the invention
Can realize that one kind of more longer transmission distance is based on it is an object of the invention to provide a kind of high-transmission low-loss
Group is being got lines crossed the photovoltaic generation monitoring system of cable communication and single-point current detecting, with asking for solving to propose in above-mentioned background technology
Topic.
The purpose of the present invention is achieved by following technical proposals:It is a kind of to be got lines crossed cable communication and single-point electricity based on group
Flow the photovoltaic generation monitoring system of detection, including photovoltaic module, assembly property detection module, group string data receiver, inverter,
Power network, group are being got lines crossed cable, connecting line and dc bus, described to be followed in series to form photovoltaic group string, and each light per N number of photovoltaic module
The both positive and negative polarity output end of component is lied prostrate by connecting the assembly property detection module of line parallel one, the both positive and negative polarity output of the photovoltaic string group
Hold by group get lines crossed cable with group string data receiver input be connected and be configured to realize monitor photovoltaic monitoring group string, institute
The both positive and negative polarity output end for stating M photovoltaic monitoring group string is parallel to the input of inverter by dc bus, while inverter
Output accesses power network.
The both positive and negative polarity output end of photovoltaic monitoring group string of the present invention with group string data receiver both positive and negative polarity output end be
Same output end.
The external output end for being connected in parallel on photovoltaic module of assembly property detection module of the present invention is built in photovoltaic group
It is in the terminal box of part and in parallel with its output end.
The beneficial effects of the invention are as follows：Originally it is bright to disclose a kind of light of get lines crossed based on group cable communication and single-point current detecting
Volt power generation monitoring system, core component includes assembly property detection module and group string data receiver.Assembly property detection module
Complete the voltage and temperature detection of each component, and related data information is sending group string data to and received by group cable of getting lines crossed
Device, group string data receiver is arranged between photovoltaic module group string and dc bus, completes the integration of current detecting and data
Transmission.It is characterized mainly in that monitoring system, without carrying out current detecting to each component, only single-point need to be carried out in same group of string
Current detecting, do so both saves cost, and power attenuation is reduced again, improves the generating efficiency in power station, while component
Energy detection module can also accomplish compact in size, be easy to be built in the terminal box of photovoltaic module.Meanwhile, got lines crossed cable reality using group
Existing wire communication, completes the transmission of component detection data, and do so can realize the communication of stabilization, can further reduce into again
This, while each group string is to that should have a group string data receiver, it is easy to realize being supervised according to power station array layout figure
Control, can accomplish the ruuning situation in simple and clear reflection power station.
Brief description of the drawings
Fig. 1 is a kind of existing conventional photovoltaic electricity generation system schematic diagram；
Fig. 2 is a kind of existing photovoltaic generation monitoring system schematic diagram with wireless telecommunications monitor；
Fig. 3 be it is of the invention it is a kind of based on group get lines crossed cable communication and single-point current detecting photovoltaic generation monitoring system illustrate
Figure.
In figure：101st, photovoltaic module, 102, assembly property detection module, 103, group string data receiver, 104, inverter,
105th, power network, 106, group get lines crossed cable, 107, connecting line, 108, dc bus.
Specific embodiment
With reference to specific embodiment further instruction, but following detailed description should not be done is managed
Solution is the limitation to body invention.It is various that those of ordinary skill in the art can apparently make on the basis of the present invention
Change and change, it should within the scope of invention.
Embodiment 1
As shown in figure 3, a kind of photovoltaic generation monitoring system of got lines crossed based on group cable communication and single-point current detecting, including photovoltaic
Component 101, assembly property detection module 102, group string data receiver 103, inverter 104, power network 105, group get lines crossed cable 106,
Connecting line 107 and dc bus 108, it is described to be followed in series to form photovoltaic group string, and each photovoltaic group per N number of photovoltaic module 101
The both positive and negative polarity output end of part 101 by the assembly property detection module 102 in parallel of connecting line 107, the photovoltaic string group it is positive and negative
Pole output end is being connected with the input of group string data receiver 103 and is being configured to realize the light of monitoring by group cable 106 of getting lines crossed
Volt monitoring group string, the both positive and negative polarity output end of the M photovoltaic monitoring group string is parallel to inverter 104 by dc bus 108
Input, while the output of inverter 104 accesses power network 105；The both positive and negative polarity output end of described photovoltaic monitoring group string is gone here and there with group
The both positive and negative polarity output end of data sink 103 is same output end；Described assembly property detection module 102 is external to be connected in parallel on photovoltaic
The output end of component 101.
Embodiment 2
As shown in figure 3, a kind of photovoltaic generation monitoring system of got lines crossed based on group cable communication and single-point current detecting, including photovoltaic
Component 101, assembly property detection module 102, group string data receiver 103, inverter 104, power network 105, group get lines crossed cable 106,
Connecting line 107 and dc bus 108, it is described to be followed in series to form photovoltaic group string, and each photovoltaic group per N number of photovoltaic module 101
The both positive and negative polarity output end of part 101 by the assembly property detection module 102 in parallel of connecting line 107, the photovoltaic string group it is positive and negative
Pole output end is being connected with the input of group string data receiver 103 and is being configured to realize the light of monitoring by group cable 106 of getting lines crossed
Volt monitoring group string, the both positive and negative polarity output end of the M photovoltaic monitoring group string is parallel to inverter 104 by dc bus 108
Input, while the output of inverter 104 accesses power network 105；The both positive and negative polarity output end of described photovoltaic monitoring assembly is gone here and there with group
The both positive and negative polarity output end of data sink 103 is same output end；Described assembly property detection module 102 is built in photovoltaic module
It is in 101 terminal box and in parallel with its output end.
Specific work process：Assembly property detection module 102 completes the work(such as voltage detecting, temperature detection and data transmission
Can, because the electric current of same group of string is identical, current sense function is completed in group string data receiver 103, so in each group
The detection of single-point electric current need to be only completed in string, without carrying out current detecting in each assembly property detection module 102, both
Cost is saved, power attenuation is reduced again, improve the generating efficiency in power station, while module 102 can accomplish compact in size,
It is easy to be built in the terminal box of photovoltaic module 101.Data transport functions use cable modem in assembly property detection module 102
The information such as news, voltage that module 102 is detected, electric current and module numbering are being passed via group cable 106 of getting lines crossed again by connecting line 107
It is sent in group string data receiver 103, group string data receiver 103 again integrates voltage and current, calculating treatment is obtained
The realtime power of each photovoltaic module, while related data information is sent to host computer being analyzed again and treatment, realization electricity
The monitoring stood.Wire communication can use direct current power carrier communication（DC-PLC）Or other can complete data pulse transmission
Mode is realized.Data are transmitting by group cable 106 of getting lines crossed, the communication of stabilization can be realized, again can effective reduces cost, while each
Group string is all to that should have a group string data receiver 103, it is easy to realize being monitored according to power station array layout figure, can accomplish
The ruuning situation in simple and clear reflection power station.
The photovoltaic generation monitoring system of a kind of got lines crossed based on group cable communication and single-point current detecting disclosed by the invention, core
Center portion part includes assembly property detection module and group string data receiver.Assembly property detection module completes the voltage of each component
And temperature detection, and related data information sending to a group string data receiver by group cable of getting lines crossed, group string data receiver sets
Put between photovoltaic module group string and dc bus, complete the integration transmission of current detecting and data.It is characterized mainly in that prison
Control system only need to carry out single-point current detecting without carrying out current detecting to each component in same group of string, and do so was both saved
Cost is saved, power attenuation has been reduced again, improve the generating efficiency in power station, while assembly property detection module can also accomplish chi
Very little miniaturization, is easy to be built in the terminal box of photovoltaic module.Meanwhile, realize wire communication using group cable of getting lines crossed, complete component
The transmission of detection data, do so can realize the communication of stabilization, and the further reduces cost of energy, while each group string is corresponding
There is a group string data receiver, it is easy to realize being monitored according to power station array layout figure, simple and clear reflection can be accomplished
The ruuning situation in power station.
Claims (3)
1. it is a kind of based on group get lines crossed cable communication and single-point current detecting photovoltaic generation monitoring system, it is characterised in that：Including
Photovoltaic module（101）, assembly property detection module（102）, group string data receiver（103）, inverter（104）, power network
（105）, group getting lines crossed cable（106）, connecting line（107）And dc bus（108）, it is described per N number of photovoltaic module（101）Go here and there successively
Connection constitutes a photovoltaic group string, and each photovoltaic module（101）Both positive and negative polarity output end pass through connecting line（107）A component in parallel
Performance detection module（102）, the both positive and negative polarity output end of the photovoltaic group string getting lines crossed cable by group（106）With a group string data receiver
（103）Input connect and be configured to realize monitoring photovoltaic monitoring group string, the both positive and negative polarity of the M photovoltaic monitoring group string
Output end passes through dc bus（108）It is parallel to inverter（104）Input, while inverter（104）Output access electricity
Net（105）.
2. it is according to claim 1 it is a kind of based on group get lines crossed cable communication and single-point current detecting photovoltaic generation monitor system
System, it is characterised in that：The both positive and negative polarity output end of described photovoltaic monitoring group string and group string data receiver（103）Both positive and negative polarity is exported
It is same output end to hold.
3. it is according to claim 1 it is a kind of based on group get lines crossed cable communication and single-point current detecting photovoltaic generation monitor system
System, it is characterised in that：Described assembly property detection module（102）It is external to be connected in parallel on photovoltaic module（101）Output end or interior
It is placed in photovoltaic module（101）Terminal box in and it is in parallel with its output end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710068319.1A CN106712096A (en) | 2017-02-08 | 2017-02-08 | Photovoltaic power generation monitoring system based on string cable communication and single-point current detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710068319.1A CN106712096A (en) | 2017-02-08 | 2017-02-08 | Photovoltaic power generation monitoring system based on string cable communication and single-point current detection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017836A (en) * | 2017-06-12 | 2017-08-04 | 阳光电源股份有限公司 | A kind of photovoltaic generating system and its component IV curved scanning methods |
| CN108599712A (en) * | 2018-04-20 | 2018-09-28 | 苏州中康电力开发有限公司 | A kind of novel photovoltaic string formation wiring construction |
| WO2023246658A1 (en) * | 2022-06-21 | 2023-12-28 | 中兴通讯股份有限公司 | Configuration method for photovoltaic system, center supervise unit, and storage medium |
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| CN104660166A (en) * | 2015-02-12 | 2015-05-27 | 苏州快可光伏电子股份有限公司 | Photovoltaic intelligent combiner box based on string MPPT power optimization and string monitoring |
| CN204497847U (en) * | 2015-03-30 | 2015-07-22 | 无锡清莲新能源科技有限公司 | Photovoltaic plant monitoring management system |
| CN105071770A (en) * | 2015-08-19 | 2015-11-18 | 杨舟 | System for monitoring operation condition of photovoltaic power station |
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2017
- 2017-02-08 CN CN201710068319.1A patent/CN106712096A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104660166A (en) * | 2015-02-12 | 2015-05-27 | 苏州快可光伏电子股份有限公司 | Photovoltaic intelligent combiner box based on string MPPT power optimization and string monitoring |
| CN204497847U (en) * | 2015-03-30 | 2015-07-22 | 无锡清莲新能源科技有限公司 | Photovoltaic plant monitoring management system |
| CN105071770A (en) * | 2015-08-19 | 2015-11-18 | 杨舟 | System for monitoring operation condition of photovoltaic power station |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017836A (en) * | 2017-06-12 | 2017-08-04 | 阳光电源股份有限公司 | A kind of photovoltaic generating system and its component IV curved scanning methods |
| CN107017836B (en) * | 2017-06-12 | 2019-03-05 | 阳光电源股份有限公司 | A kind of photovoltaic generating system and its component IV curved scanning method |
| CN108599712A (en) * | 2018-04-20 | 2018-09-28 | 苏州中康电力开发有限公司 | A kind of novel photovoltaic string formation wiring construction |
| WO2023246658A1 (en) * | 2022-06-21 | 2023-12-28 | 中兴通讯股份有限公司 | Configuration method for photovoltaic system, center supervise unit, and storage medium |
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Application publication date: 20170524 |