CN107547047A - A kind of grid-connected monitoring system of distributed photovoltaic and monitoring method - Google Patents
A kind of grid-connected monitoring system of distributed photovoltaic and monitoring method Download PDFInfo
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- CN107547047A CN107547047A CN201710979882.4A CN201710979882A CN107547047A CN 107547047 A CN107547047 A CN 107547047A CN 201710979882 A CN201710979882 A CN 201710979882A CN 107547047 A CN107547047 A CN 107547047A
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- photovoltaic
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- stealing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
The present invention relates to technical field of power systems, more particularly, to a kind of grid-connected monitoring system of distributed photovoltaic and monitoring method.The grid-connected Application of Monitoring System of distributed photovoltaic can communicate wirelessly in distribution type photovoltaic power generation device, including control backstage and monitoring device, control backstage with monitoring device；Monitoring device includes control device and the environment information acquisition device electrically connected with control device, estimates electric quantity collector, wireless communication apparatus, and control device electrically connects with photovoltaic generation gauge table.Grid-connected monitoring system combining environmental factor is tentatively judged generated energy, after it stealing possibility be present in preliminary judgement, again by generated energy and the input based on combining inverter and output current voltage calculate estimate generated energy compared with, if ratio exceeds default scope, be judged as stealing.
Description
Technical field
The present invention relates to technical field of power systems, more particularly, to a kind of grid-connected monitoring system of distributed photovoltaic and
Monitoring method.
Background technology
With the implementation of photovoltaic help-the-poor policy, the distributed photovoltaic power generation permeability grid-connected in mesolow side gradually steps up,
So that power network while power quality problem is faced, is also faced with the problem of user deceives benefit using technological means stealing, user
The power supply of power distribution network is directly accessed photovoltaic gauge table front end, to increase the electricity reading of photovoltaic gauge table, to the safety of power network
Infringement is caused with the economic interests of power network.Therefore, it is necessary to set monitoring system is grid-connected to distributed photovoltaic to be monitored, prevent
The only behavior of user's stealing.
The content of the invention
The present invention is to overcome at least one defect described in above-mentioned prior art, there is provided a kind of grid-connected monitoring of distributed photovoltaic
System and monitoring method, it is grid-connected to distributed photovoltaic to be monitored, analyze whether corresponding user has the possibility of stealing.
In order to solve the above technical problems, present invention employs following technical scheme：
A kind of grid-connected monitoring system of distributed photovoltaic, applied to distribution type photovoltaic power generation device, photovoltaic power generation apparatus includes electrical
The AC power distribution cabinet/AC distribution panel and combining inverter of connection, AC power distribution cabinet/AC distribution panel are connected by photovoltaic generation gauge table with power distribution network, distributed
Grid-connected detecting system includes control backstage and monitoring device, and control backstage can communicate wirelessly with monitoring device；Monitoring
Device includes control device and the environment information acquisition device electrically connected with control device, estimates electric quantity collector, channel radio
Device is interrogated, control device electrically connects with photovoltaic generation gauge table.
Further, environment information acquisition device includes photoelectric sensor, temperature sensor and air velocity transducer.To photovoltaic
The influential environmental factor that generates electricity is acquired, including the factor such as light intensity, temperature and wind speed.
Further, the first voltage transformer that electric quantity collector includes electrically connecting with combining inverter input end is estimated
The second voltage transformer and the second current transformer electrically connected with the first current transformer and with combining inverter output end.Point
It is other that grid-connected input current and voltage, output current and voltage are acquired.
Preferably, the grid-connected monitoring system of distributed photovoltaic also includes the display device electrically connected with control device, for showing
Show and estimate photovoltaic power generation quantity, actual power generation, and anti-electricity-theft probability etc..
Preferably, control device is PLC control system.
The grid-connected monitoring system of distributed photovoltaic proposed by the present invention environmental information to collection and is estimated by control device
Electricity carries out analysis judgement, and the quality of power supply and stealing possibility are analyzed, and analysis result is sent into control backstage is carried out
Unified monitoring.
Present invention also offers a kind of grid-connected monitoring method of distributed photovoltaic, comprise the following steps：
A kind of grid-connected monitoring method of distributed photovoltaic, comprises the following steps：
S1：Estimate photovoltaic power generation quantity：DC voltage, the direct current that combining inverter inputs are gathered by estimating electric quantity collector
Stream and the alternating current and alternating voltage of combining inverter output, control device, which is estimated to calculate, estimates photovoltaic power generation quantity；
S2：Environment-identification influence factor：Environment information acquisition device is acquired and is stored in intensity of illumination, temperature and wind speed
In control device；
S3：Analysis calculates, and comprises the following steps that：
S31：The measured value of photovoltaic generation gauge table is substituted into photovoltaic power generation quantity and the relation curve of environmental factor by control device, and
The alternating voltage and the value of alternating current exported according to combining inverter calculates grid-connected power output；
S32：The power output calculated to step S32 and the data of photovoltaic generation gauge table take ratio, if ratio is not default
The first ratio range in, that is, judge stealing may occur and perform step S33；If ratio is in default first ratio range
It is interior, then judge, completion result judgement possible in the absence of stealing；
S33：Photovoltaic generation of estimating in the data of photovoltaic generation gauge table and step S1 is measured into ratio, if ratio is not default
The second ratio range in, then judge exist stealing may；If ratio, in default second ratio range, judgement is not present
Stealing is possible, completes result and judges；
S4：Backstage monitors：After electricity stealing probability analysis result is sent to control by control device by wireless communication apparatus
Platform is monitored.
Further, relation curve includes relation curve, DC voltage and the photovoltaic hair of intensity of illumination and photovoltaic power generation quantity
The relation curve of the relation curve of electricity, DC current and photovoltaic power generation quantity.
Combining environmental factor first of the invention is tentatively judged that generated energy stealing be present by preliminary judgement may
Afterwards, then by generated energy and the input based on combining inverter and output current voltage calculate estimate generated energy compared with,
If ratio exceeds default scope, it is judged as stealing.
Compared with prior art, beneficial effect is：The present invention passes through the input and output to environmental factor and combining inverter
Current Voltage is acquired, and calculates the discreet current of photovoltaic power generation apparatus, grid-connected possible with the presence or absence of stealing so as to what is judged；This
According to the relation curve of intensity of illumination, DC voltage, DC current and photovoltaic power generation quantity in invention, the generated energy of measurement is substituted into
Into image, calculate simple.
Brief description of the drawings
Fig. 1 is the structural representation of the grid-connected embodiment of monitoring system one of distributed photovoltaic of the present invention.
Fig. 2 is the flow chart of the grid-connected embodiment of monitoring method one of distributed photovoltaic of the present invention.
Embodiment
The present invention is described further below in conjunction with the accompanying drawings, it is necessary to illustrate, being given for example only property of accompanying drawing illustrates,
It is not intended that the limitation to this patent.
As shown in figure 1, a kind of grid-connected monitoring system of distributed photovoltaic, applied to distribution type photovoltaic power generation device, photovoltaic hair
Electric installation includes the AC power distribution cabinet/AC distribution panel and combining inverter being electrically connected with, and AC power distribution cabinet/AC distribution panel passes through photovoltaic generation gauge table and distribution
Net is connected, and the grid-connected detecting system of distributed photovoltaic includes control backstage and monitoring device, and control backstage can be carried out with monitoring device
Wireless telecommunications；Monitoring device includes control device and the environment information acquisition device electrically connected with control device, estimates electricity and adopt
Acquisition means, wireless communication apparatus, control device electrically connect with the photovoltaic generation gauge table.
Further, environment information acquisition device includes photoelectric sensor, temperature sensor and air velocity transducer；Estimate electricity
Amount harvester include the first voltage transformer that is electrically connected with combining inverter input end and the first current transformer and with simultaneously
The second voltage transformer and the second current transformer of net inverter output end electrical connection.
Further, the grid-connected monitoring system of distributed photovoltaic also includes the display device electrically connected with control device.
Preferably, control device is PLC control system.
The grid-connected monitoring system of distributed photovoltaic proposed by the present invention environmental information to collection and is estimated by control device
Electricity carries out analysis judgement, will estimate photovoltaic power generation quantity, actual power generation, and the presentation of information such as anti-electricity-theft probability and is showing
On device, and the quality of power supply and stealing possibility are analyzed, analysis result is sent into control backstage carries out unified monitoring.
Present invention also offers a kind of grid-connected monitoring method of distributed photovoltaic, comprise the following steps：
A kind of grid-connected monitoring method of distributed photovoltaic, comprises the following steps：
S1：Estimate photovoltaic power generation quantity：DC voltage, the direct current that combining inverter inputs are gathered by estimating electric quantity collector
Stream and the alternating current and alternating voltage of combining inverter output, control device, which is estimated to calculate, estimates photovoltaic power generation quantity；
S2：Environment-identification influence factor：Environment information acquisition device is acquired and is stored in intensity of illumination, temperature and wind speed
In control device；
S3：Analysis calculates, and comprises the following steps that：
S31：Control device substitutes into the measured value of photovoltaic generation gauge table the relation curve, straight of intensity of illumination and photovoltaic power generation quantity
The relation curve of the relation curve of stream voltage and photovoltaic power generation quantity, DC current and photovoltaic power generation quantity, and according to combining inverter
The alternating voltage of output and the value of alternating current calculate grid-connected power output；
S32：The power output calculated to step S32 and the data of photovoltaic generation gauge table take ratio, if ratio is not default
The first ratio range in, that is, judge stealing may occur and perform step S33；If ratio is in default first ratio range
It is interior, then judge, completion result judgement possible in the absence of stealing；
S33：Photovoltaic generation of estimating in the data of photovoltaic generation gauge table and step S1 is measured into ratio, if ratio is not default
The second ratio range in, then judge exist stealing may；If ratio, in default second ratio range, judgement is not present
Stealing is possible, completes result and judges；
S4：Backstage monitors：After electricity stealing probability analysis result is sent to control by control device by wireless communication apparatus
Platform is monitored.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (7)
1. a kind of grid-connected monitoring system of distributed photovoltaic, applied to distribution type photovoltaic power generation device, the photovoltaic power generation apparatus bag
The AC power distribution cabinet/AC distribution panel and combining inverter of electric connection are included, AC power distribution cabinet/AC distribution panel is connected by photovoltaic generation gauge table with power distribution network,
Characterized in that, the grid-connected detecting system of distributed photovoltaic includes control backstage and monitoring device, the control backstage and prison
Surveying device can communicate wirelessly；The monitoring device includes control device and the environment information acquisition electrically connected with control device
Device, electric quantity collector, wireless communication apparatus are estimated, the control device electrically connects with the photovoltaic generation gauge table.
A kind of 2. grid-connected monitoring system of distributed photovoltaic according to claim 1, it is characterised in that：The environmental information is adopted
Acquisition means include photoelectric sensor, temperature sensor and air velocity transducer.
A kind of 3. grid-connected monitoring system of distributed photovoltaic according to claim 1, it is characterised in that：The electricity of estimating is adopted
Acquisition means include the first voltage transformer that is electrically connected with the combining inverter input end and the first current transformer and with institute
State the second voltage transformer and the second current transformer of combining inverter output end electrical connection.
A kind of 4. grid-connected monitoring system of distributed photovoltaic according to claim 1, it is characterised in that：Also include filling with control
Put the display device of electrical connection.
A kind of 5. grid-connected monitoring system of distributed photovoltaic according to claim 1, it is characterised in that：The control device is
PLC control system.
6. a kind of grid-connected monitoring method of distributed photovoltaic, it is characterised in that comprise the following steps：
S1：Estimate photovoltaic power generation quantity：DC voltage, the direct current that combining inverter inputs are gathered by estimating electric quantity collector
Stream and the alternating current and alternating voltage of combining inverter output, control device, which is estimated to calculate, estimates photovoltaic power generation quantity；
S2：Environment-identification influence factor：Environment information acquisition device is acquired and is stored in intensity of illumination, temperature and wind speed
In control device；
S3：Analysis calculates, and comprises the following steps that：
S31：The measured value of photovoltaic generation gauge table is substituted into photovoltaic power generation quantity and the relation curve of environmental factor by control device, and
The alternating voltage and the value of alternating current exported according to combining inverter calculates grid-connected power output；
S32：The power output calculated to step S32 and the data of photovoltaic generation gauge table take ratio, if ratio is not default
The first ratio range in, that is, judge stealing may occur and perform step S33；If ratio is in default first ratio range
It is interior, then judge, completion result judgement possible in the absence of stealing；
S33：Photovoltaic generation of estimating in the data of photovoltaic generation gauge table and step S1 is measured into ratio, if ratio is not default
The second ratio range in, then judge exist stealing may；If ratio, in default second ratio range, judgement is not present
Stealing is possible, completes result and judges；
S4：Backstage monitors：After electricity stealing probability analysis result is sent to control by control device by wireless communication apparatus
Platform is monitored.
7. a kind of distributed photovoltaic according to claim 6 and network detecting method, it is characterised in that the relation curve bag
Include the relation curve of intensity of illumination and photovoltaic power generation quantity, the relation curve of DC voltage and photovoltaic power generation quantity, DC current and light
Lie prostrate the relation curve of generated energy.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108173349A (en) * | 2018-01-24 | 2018-06-15 | 宁波大家小家网络科技有限公司 | A kind of method and system of the power generation data monitoring analysis of photovoltaic power generation apparatus |
| CN108418547A (en) * | 2018-05-07 | 2018-08-17 | 北京汉能光伏投资有限公司 | Domestic solar outgoing electrical measurement test system |
| CN109600116A (en) * | 2018-12-19 | 2019-04-09 | 广州供电局有限公司 | Mobile grid-connected detection system |
| CN110929897A (en) * | 2019-12-04 | 2020-03-27 | 国网上海市电力公司 | Resident distributed photovoltaic operation diagnosis system |
| CN110969539A (en) * | 2019-11-28 | 2020-04-07 | 温岭市非普电气有限公司 | Photovoltaic electricity stealing discovery method and system based on curve morphological analysis |
| CN111505408A (en) * | 2020-03-19 | 2020-08-07 | 尚特杰电力科技有限公司 | Detection system and method for photovoltaic inverter |
| CN112751419A (en) * | 2020-12-31 | 2021-05-04 | 浙江华电器材检测研究所有限公司 | Photovoltaic multi-parameter monitoring system and method thereof |
| CN116937569A (en) * | 2023-07-26 | 2023-10-24 | 广东永光新能源设计咨询有限公司 | Intelligent energy storage method and device for photovoltaic power generation and electronic equipment |
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| CN111505408A (en) * | 2020-03-19 | 2020-08-07 | 尚特杰电力科技有限公司 | Detection system and method for photovoltaic inverter |
| CN112751419A (en) * | 2020-12-31 | 2021-05-04 | 浙江华电器材检测研究所有限公司 | Photovoltaic multi-parameter monitoring system and method thereof |
| CN116937569A (en) * | 2023-07-26 | 2023-10-24 | 广东永光新能源设计咨询有限公司 | Intelligent energy storage method and device for photovoltaic power generation and electronic equipment |
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