CN107528540A - Photovoltaic array on-Line Monitor Device and method - Google Patents
Photovoltaic array on-Line Monitor Device and method Download PDFInfo
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- CN107528540A CN107528540A CN201710958052.3A CN201710958052A CN107528540A CN 107528540 A CN107528540 A CN 107528540A CN 201710958052 A CN201710958052 A CN 201710958052A CN 107528540 A CN107528540 A CN 107528540A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 32
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000012806 monitoring device Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 239000000725 suspension Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012857 repacking Methods 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
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- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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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
- 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
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- H02J13/0003—
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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 present invention relates to a kind of photovoltaic array on-Line Monitor Device and method, the photovoltaic array includes multiple photovoltaic array group strings, a header box is respectively arranged with each photovoltaic array group string, each header box is connected to an inverter, and the on-Line Monitor Device includes host computer, concentrator and multiple collectors.This kind of photovoltaic array on-Line Monitor Device and method, using wire suspension type intelligent Hall open-loop current sensor, header box circuit design is not influenceed；Therefore, the device can be used to the design of photovoltaic plant new projects, it can also be used to existing photovoltaic plant intelligentized updating；Using PLC technology, without extra communication cable, cost is saved；Power line communication network belongs to " plug and play ", and access power supply is equal to connect communication network, real-time online；With automatic routing function, communication network is more flexible, and signal will not be obstructed；It is simple in construction, using conveniently, there is wider application.
Description
Technical field
The present invention relates to photovoltaic intelligent O＆M technical field, more particularly to photovoltaic array monitoring technical field, in particular to
A kind of photovoltaic array on-Line Monitor Device and method.
Background technology
With photovoltaic generation Large scale construction and grid-connected successively, operation maintenance has turned into the most important thing of photovoltaic plant, directly
Connect the safety and reliability for being related to power station and investment return etc..Solar photovoltaic power plant is by several photovoltaic array groups
Into, and photovoltaic array is to be combined by hundreds and thousands of individual photovoltaic modulies by series, parallel, the generated energy of photovoltaic array is
The summation of monolithic photovoltaic module generated energy.In actual applications, the generated energy of photovoltaic module array is restricted by factors
Influence, such as the change, photovoltaic module failure, damage and aging etc. of the temperature of external environment, the intensity of sunshine, wind speed etc..Press
According to the country in operation photovoltaic plant scale, it is assumed that the fault rate of photovoltaic module is 1%, generating capacitance loss estimation 430,000 in 2015
KW or so, generated energy lose more than 4.3 hundred million kilowatt hours.With operation the time growth, photovoltaic plant fault rate also will year by year on
Rise.From the point of view of all kinds of failures of current photovoltaic plant, the hot spot of photovoltaic module array is one of most serious failure, due to photovoltaic battle array
Arrange series-parallel feature, once a certain block assembly damage or break down and cisco unity malfunction, faulty components cannot and
When replace, it would be possible to whole photovoltaic array is failed, ultimately result in photovoltaic plant and become ornaments.
However, photovoltaic plant has the characteristics of widely distributed, or in remote districts, or in building roof, or even fishpond water
It is first-class.Carry out manually monitoring and safeguarding that not only cost of labor is high for substantial amounts and scattered photovoltaic module working condition, and
And be difficult that the source of trouble is accurately positioned in the very first time, fix a breakdown in time.In order to ensure photovoltaic plant efficiently, reliably, stably
Operation, it is necessary to establish photovoltaic array information monitoring system, be monitored to the working condition of photovoltaic module, collection photovoltaic module is each
Operational factor, including the output current of photovoltaic module and voltage, the temperature etc. of photovoltaic module, choose suitable communication modes and pass
Deliver letters breath, collect, store and analyze raw data associated, timely fault point, Accurate Diagnosis failure cause, improve photovoltaic hair
The electric efficiency of management, and optimization for system and improvement and scientific research provide effective data.
Therefore, simultaneously popularization and application are very necessary for the monitoring device of development and application photovoltaic array.The monitoring of photovoltaic array is set
Standby technological development is related to two problems：First, existing tens G's does not install monitoring device in power plant under operation more than 95%, this
A little power stations face the O＆M problem of sternness；Second, data communication is one of technological core of monitoring device, the reliability of communication is such as
What ensures.
The content of the invention
The purpose of the present invention is the shortcomings that overcoming above-mentioned prior art, there is provided a kind of photovoltaic array on-Line Monitor Device
And method, simple in construction, flexible for installation, real time on-line monitoring photovoltaic array state, signal stabilization is reliable, has wider
General application.
To achieve these goals, the present invention has following form：
The invention provides a kind of photovoltaic array on-Line Monitor Device, the photovoltaic array includes multiple photovoltaic array groups
Go here and there, be respectively arranged with a header box at each photovoltaic array group string, each header box is connected to an inverter, institute
Stating on-Line Monitor Device includes host computer, concentrator and multiple collectors, wherein：
The collector is corresponded with the header box, and each collector is arranged at corresponding header box,
The collector is used for the photovoltaic group string data for gathering corresponding header box；
The concentrator is arranged at the inverter, and the concentrator is communicated each to obtain with the collector
The photovoltaic group string data of the header box, and the concentrator will be sent to described upper after the photovoltaic group string data summarization
Machine；
The host computer is installed on industrial computer.
Alternatively, the photovoltaic group string data of the header box include photovoltaic group string voltage data and photovoltaic group string electric current number
According to each collector includes：
Collector communication module, for being communicated with the concentrator, the photovoltaic group string data of the header box are sent out
Deliver to the concentrator；
A/D modular converters, it is connected with the collector communication module, for electric current and voltage analog signal to be converted to
Data signal；
Current sensor, for obtaining photovoltaic group string current data at the header box；And
Voltage sensor, for obtaining photovoltaic group string voltage data at the header box.
Alternatively, the current sensor is Hall open-loop current sensor, corresponding in the get along sensing of confluxing
The current data of photovoltaic array group string.
Alternatively, the collector communication module is collector HVDC carrier module, by the photovoltaic group string voltage
Data conversion is sent to the concentrator into power carrier signal by serial ports.
Alternatively, the concentrator includes：
Concentrator control module；
Concentrator HVDC carrier module, for being communicated with the collector, obtain each collector and adopt
The power carrier signal of the photovoltaic group string data of the header box of collection；And
Ethernet/GPRS communication modules, for being communicated with the host computer, after the photovoltaic group string data summarization
Send to the host computer.
Alternatively, described device also includes power management module, and the power management module is built in the concentration respectively
Device and the collector, it is powered for the concentrator and the collector.
Alternatively, the power management module includes filter unit and DC/DC pressure units, the power management module
The low pressure that high voltage input terminal accesses the power management module after the filter unit and the DC/DC pressure units successively is defeated
Go out end.
Alternatively, the power management module also includes lightning protection unit and security unit, and the lightning protection unit is arranged at institute
State between the high voltage input terminal of power management module and the filter unit, the security unit be arranged at the filter unit and
Between the DC/DC pressure units.
The present invention also provides a kind of photovoltaic array on-line monitoring method, based on described photovoltaic array on-Line Monitor Device,
Methods described comprises the following steps：
The collector obtains institute according to preset voltage value frequency acquisition and current value frequency acquisition at the header box
The photovoltaic group string data of corresponding header box；
The concentrator obtains the light of corresponding header box according to preset data frequency acquisition from each collector
Volt group string data；
After the photovoltaic group string data summarization of header box corresponding to each collector of concentrator, send to described
Host computer.
Alternatively, the collector gathered 20 road current values and 1 road magnitude of voltage every 1 second from the header box；
The collector askes the data of each collector collection every 10 second wheels.
Photovoltaic array on-Line Monitor Device and the method in the invention are employed, is had the advantages that：
1) it is simple in construction, it is flexible for installation：Using wire suspension type intelligent Hall open-loop current sensor, header box circuit is not influenceed and is set
Meter；Therefore, the device can be used to the design of photovoltaic plant new projects, it can also be used to existing photovoltaic plant repacking；
2) " wireless " communication, real-time online：PLC technology saves cost without extra communication cable；Power line leads to
Communication network belongs to " plug and play ", and access power supply is equal to connect communication network, real-time online；
3) signal stabilization, it is reliable：With automatic routing function, communication network is more flexible, and signal will not be hindered
Every.
Brief description of the drawings
Fig. 1 is the structural representation of the photovoltaic array on-Line Monitor Device of the present invention；
Fig. 2 is that the signal of the photovoltaic array on-Line Monitor Device of the present invention sends figure；
Fig. 3 is the theory diagram of the collector of the photovoltaic array on-Line Monitor Device of the present invention；
Fig. 4 is the theory diagram of the concentrator of the photovoltaic array on-Line Monitor Device of the present invention；
Fig. 5 is the structural representation of the power management module of the present invention.
Embodiment
In order to more clearly describe the technology contents of the present invention, carried out with reference to specific embodiment further
Description.
As shown in Fig. 1~2, the invention provides a kind of photovoltaic array on-Line Monitor Device, the photovoltaic array includes more
Individual photovoltaic array group string, a header box is respectively arranged with each photovoltaic array group string, each header box is all connected with
To an inverter, the on-Line Monitor Device includes host computer, concentrator and multiple collectors, wherein：
The collector is corresponded with the header box, and each collector is arranged at corresponding header box,
The collector is used for the photovoltaic group string data for gathering corresponding header box；
The concentrator is arranged at the inverter, and the concentrator is communicated each to obtain with the collector
The photovoltaic group string data of the header box, and the concentrator will be sent to described upper after the photovoltaic group string data summarization
Machine.
In a preferred embodiment, the photovoltaic group string data of the header box include photovoltaic group string voltage data and
Photovoltaic group string current data, each collector include：
Direct current carrier communication module, for being communicated with the concentrator, by the photovoltaic group string data of the header box
Send to the concentrator；A/D modular converters, it is connected with the collector communication module, for by electric current and voltage analog
Signal is converted to data signal；Current sensor, for obtaining photovoltaic group string current data at the header box；And voltage
Sensor, for obtaining photovoltaic group string voltage data at the header box.
In a preferred embodiment, the current sensor is Hall open-loop current sensor, senses light indirectly
Photovoltaic array group string current value.The collector communication module is preferably collector HVDC carrier communication module, and passes through height
Power cable is sent out.
The collector can be every gathering 20 road electric currents and 1 road magnitude of voltage, scope 0~4096 in 1s；Parse sensor
Data, and the data for being sent out gathering by HVDC carrier communication.The collector is applied to principle frame in practice
Figure can be found in shown in Fig. 3.Wherein, the chip of the collector or module type selecting can refer to table 1 below.
The collector components selection table of table 1
| Chip/module type selecting | Description |
| STM32F107 | Support serial ports |
| Carrier module TN | Serial ports turns carrier module |
| Voltage acquisition module | PCB Installation Modes |
| Current acquisition module | Hall open-loop current sensor |
In a preferred embodiment, the concentrator includes：
Concentrator control module；Concentrator HVDC carrier communication module, for being communicated with the collector, obtain
Take the carrier signal of the photovoltaic group string data of the header box of each collector collection；And Ethernet/GPRS communication modules,
For being communicated with the host computer, will be sent after the photovoltaic group string data summarization to the host computer.
The concentrator can be every the data of each collector collection of 10sec polls；As tcpServer, client is monitored
Machine connects, and handles modebus agreements；Concentrator supports Modbus TCP/IP standard agreements, 03H and 17H concentrators are monitored
502 ports.
The concentrator is applied to the structure in specific embodiment as shown in figure 4, the type selecting of each chip or module in Fig. 4
It can refer to table 2 below.
The concentrator components selection table of table 2
Management system power requirement meets 200~1500 volts of input voltage, 12 volts of output voltage, and power output is more than 20W；
Using golden rising Yang DCDC power modules PV40-29B12；The safety such as lightning protection, filtering, insurance can be added in power supply front end to arrange
Apply；Internal system can take decompression chip LM317, realize 3.3 volts and 5 volts of light current power supplies.
Based on this, in a preferred embodiment, described device also includes power management module, the power management
Module is powered to the concentrator, the collector and the host computer respectively.
As shown in figure 5, in a preferred embodiment, the power management module includes filter unit and DC/DC
Pressure unit, the high voltage input terminal of the power management module is successively after the filter unit and the DC/DC pressure units
Access the low-voltage output of the power management module.
In a preferred embodiment, the power management module also includes lightning protection unit and security unit, described
Lightning protection unit is arranged between the high voltage input terminal of the power management module and the filter unit, and the security unit is set
Between the filter unit and the DC/DC pressure units.
The invention further relates to a kind of photovoltaic array on-line monitoring method, based on described photovoltaic array on-Line Monitor Device,
Methods described comprises the following steps：
The collector obtains institute according to preset voltage value frequency acquisition and current value frequency acquisition at the header box
The photovoltaic group string data of corresponding header box；
The concentrator obtains the light of corresponding header box according to preset data frequency acquisition from each collector
Volt group string data；
After the photovoltaic group string data summarization of header box corresponding to each collector of concentrator, send to described
Host computer.
In a preferred embodiment, the collector gathered 20 road current values and 1 every 1 second from the header box
Road magnitude of voltage；
The collector askes the data of each collector collection every 10 second wheels.
After the photovoltaic array on-Line Monitor Device of the present invention is applied into scene, with photovoltaic plant automatic running.The device
Equipped with master system, concentrator can be connected by Ethernet or GPRS, the industrial PC of master system is installed
Can real-time collecting and analyze data, realize photovoltaic plant intelligence O＆M.
Photovoltaic array on-Line Monitor Device and the method in the invention are employed, is had the advantages that：
1) it is simple in construction, it is flexible for installation：Using wire suspension type intelligent Hall open-loop current sensor, header box circuit is not influenceed and is set
Meter；Therefore, the device can be used to the design of photovoltaic plant new projects, it can also be used to existing photovoltaic plant repacking；
2) " wireless " communication, real-time online：PLC technology saves cost without extra communication cable；Power line leads to
Communication network belongs to " plug and play ", and access power supply is equal to connect communication network, real-time online；
3) signal stabilization, it is reliable：With automatic routing function, communication network is more flexible, and signal will not be hindered
Every.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that it can still make
Various modifications and alterations are without departing from the spirit and scope of the present invention.Therefore, specification and drawings are considered as illustrative
It is and nonrestrictive.
Claims (10)
1. a kind of photovoltaic array on-Line Monitor Device, it is characterised in that the photovoltaic array includes multiple photovoltaic array group strings, respectively
Be respectively arranged with a header box at the individual photovoltaic array group string, each header box is connected to an inverter, it is described
Line monitoring device includes host computer, concentrator and multiple collectors, wherein：
The collector is corresponded with the header box, and each collector is arranged at corresponding header box, described
Collector is used for the photovoltaic group string data for gathering corresponding header box；
The concentrator is arranged at the inverter, and the concentrator is communicated each described to obtain with the collector
The photovoltaic group string data of header box, and the concentrator will be sent to the host computer after the photovoltaic group string data summarization；
The host computer is installed on industrial computer.
2. photovoltaic array on-Line Monitor Device according to claim 1, it is characterised in that the photovoltaic group string of the header box
Data include photovoltaic group string voltage data and photovoltaic group string current data, and each collector includes：
Collector communication module, for being communicated with the concentrator, by the photovoltaic group string data of the header box send to
The concentrator；
A/D modular converters, it is connected with the collector communication module, for electric current and voltage analog signal to be converted into numeral
Signal；
Current sensor, for obtaining photovoltaic group string current data at the header box；And
Voltage sensor, for obtaining photovoltaic group string voltage data at the header box.
3. photovoltaic array on-Line Monitor Device according to claim 2, it is characterised in that the current sensor is Hall
Open-loop current sensor, in the current data of the corresponding photovoltaic array group string of sensing of getting along of confluxing.
4. photovoltaic array on-Line Monitor Device according to claim 2, it is characterised in that the collector communication module is
Collector HVDC carrier module, by the photovoltaic group string voltage data be converted into power carrier signal by serial ports send to
The concentrator.
5. photovoltaic array on-Line Monitor Device according to claim 1, it is characterised in that the concentrator includes：
Concentrator control module；
Concentrator HVDC carrier module, for being communicated with the collector, obtain each collector collection
The power carrier signal of the photovoltaic group string data of header box；And
Ethernet/GPRS communication modules, for being communicated with the host computer, it will be sent after the photovoltaic group string data summarization
To the host computer.
6. photovoltaic array on-Line Monitor Device according to claim 1, it is characterised in that described device also includes power supply pipe
Module is managed, the power management module is built in the concentrator and the collector respectively, for the concentrator and described adopts
Storage is powered.
7. photovoltaic array on-Line Monitor Device according to claim 6, it is characterised in that the power management module includes
Filter unit and DC/DC pressure units, the high voltage input terminal of the power management module is successively through the filter unit and described
The low-voltage output of the power management module is accessed after DC/DC pressure units.
8. photovoltaic array on-Line Monitor Device according to claim 7, it is characterised in that the power management module also wraps
Lightning protection unit and security unit are included, the lightning protection unit is arranged at the high voltage input terminal of the power management module and the filtering
Between unit, the security unit is arranged between the filter unit and the DC/DC pressure units.
9. a kind of photovoltaic array on-line monitoring method, it is characterised in that based on the photovoltaic any one of claim 1 to 8
Array on-Line Monitor Device, methods described comprise the following steps：
Corresponding to the collector obtains at the header box according to preset voltage value frequency acquisition and current value frequency acquisition
Header box photovoltaic group string data；
The concentrator obtains the photovoltaic group of corresponding header box according to preset data frequency acquisition from each collector
String data；
After the photovoltaic group string data summarization of header box corresponding to each collector of concentrator, send to described upper
Machine.
10. photovoltaic array on-line monitoring method according to claim 9, it is characterised in that the collector every 1 second from
The header box gathers 20 road current values and 1 road magnitude of voltage；
The collector askes the data of each collector collection every 10 second wheels.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710136967 | 2017-03-09 | ||
| CN2017101369676 | 2017-03-09 |
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| CN112713857A (en) * | 2020-12-24 | 2021-04-27 | 中电国芯(南京)科技有限公司 | Automatic string attribution identification method for photovoltaic module array |
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| CN109713787A (en) * | 2018-10-09 | 2019-05-03 | 安徽大恒能源科技有限公司 | A kind of photovoltaic management system |
| CN112713857A (en) * | 2020-12-24 | 2021-04-27 | 中电国芯(南京)科技有限公司 | Automatic string attribution identification method for photovoltaic module array |
| CN112713857B (en) * | 2020-12-24 | 2024-03-26 | 重庆鼎泰精维科技有限公司 | Automatic string attribution identification method for photovoltaic module array |
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Application publication date: 20171229 |