CN109474000A - A kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis system and method - Google Patents
A kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis system and method Download PDFInfo
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- CN109474000A CN109474000A CN201711484132.6A CN201711484132A CN109474000A CN 109474000 A CN109474000 A CN 109474000A CN 201711484132 A CN201711484132 A CN 201711484132A CN 109474000 A CN109474000 A CN 109474000A
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Classifications
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- H02J3/383—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
-
- 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
Abstract
The present invention relates to a kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis system and methods, mainly photovoltaic island power supply cannot be efficiently used to reach in power supply system failure by solving the prior art, load point within the scope of isolated island can be powered, the problem of guaranteeing the normal operation of isolated island range internal loading, historical data base including recording each area's power load amount, photo-voltaic power supply, detect the gird-connected inverter of grid cut-off front and back system impedance variation, cut off the turn-off module of circuit, impedance judgment module, data memory module, data acquisition module, data analysis module, photo-voltaic power supply distribution module, warning information sending module and communication module.The present invention can efficiently use photovoltaic island power supply to reach in power supply system failure, load point within the scope of isolated island can be powered, the normal operation for guaranteeing isolated island range internal loading, improves the utilization rate to light energy source, ensure that the safe and stable operation of electric system.
Description
Technical field
The present invention relates to photovoltaic distribution technical fields, intelligently divide more particularly, to a kind of distribute-electricity transformer district distributed photovoltaic power
Analysis system and method.
Background technique
Nowadays, distributed photovoltaic power generation technology is a very promising new-generation technology in China, it is benefit
It is this good to environment with solar energy and can be generated electricity with regenerated resource.With the fast development of Chinese economy, society into
Step, people increasingly be unable to do without electric power energy, become people life in indispensable a part, however all the time I
State is generated electricity using chemical fuels such as coal, natural gas, petroleum mostly, these fuel are all to belong to non-renewable money
Source, so if followed by these resources are used for a long time, it one day can be exhausted, moreover, there are one bigger for they
Disadvantage, the gas generated the and waste residue of fertility can pollute environment, people rise steadily to the demand of electric power after exactly burning,
Generated energy is consequently increased, and environment can't bear the heavy load.Therefore exploitation new technology is necessary, and distributed generation technology is with regard to convex
Its advantages have been shown, it is achieving environmental protection and energy saving, but there is uncontrollabilities for this distributed photovoltaic, therefore are easy to power distribution network
The reliability of power supply brings detrimental effect.
Application No. is 201510459138.2, the patent of entitled " a kind of statistical analysis technique of distributed generation resource photovoltaic "
A kind of statistical analysis technique of distributed generation resource photovoltaic is disclosed in specification, which is intended to eliminate power supply isolated island, Bu Nengyou
Effect, to reach in power supply system failure, can be powered the load point within the scope of isolated island using photovoltaic power supply isolated island, protect
Demonstrate,prove the normal operation of isolated island range internal loading.
Summary of the invention
The present invention, which mainly solves the prior art, cannot efficiently use photovoltaic island power supply to reach in power supply system failure
When, the problem of being powered to the load point within the scope of isolated island, guarantee the normal operation of isolated island range internal loading, provide
A kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis system and method.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals: a kind of distribute-electricity transformer district distribution
Formula photo-voltaic power supply intelligent analysis system, historical data base, photo-voltaic power supply, detection electricity including recording each area's power load amount
The gird-connected inverter of net power-off front and back system impedance variation, the turn-off module for cutting off circuit, impedance judgment module, data store mould
Block, data acquisition module, data analysis module, photo-voltaic power supply distribution module, warning information sending module and communication module, institute
Historical data base, data acquisition module, data analysis module, photo-voltaic power supply distribution module and data memory module is stated successively to connect
It connecing, the photo-voltaic power supply, gird-connected inverter, impedance judgment module, warning information sending module and communication module are sequentially connected,
The warning information sending module is connect with data memory module, and the data memory module is connect with historical data base, described
Turn-off module is connect with gird-connected inverter.
The present invention is analyzed by the historical data to each area's power load amount, determines the actual load in each region
Demand, the minimum photo-voltaic power supply set up needed for the workload demand amount in each region then determined analyzes and photo-voltaic power supply
Specific distributing position, while the impedance variations of gird-connected inverter detection breaker work front and back system, the judgement of impedance judgment module
Whether photovoltaic island power supply is safe at this time, and warning information sending module is sent a warning message by communication module if dangerous.
As a preferred embodiment, the turn-off module includes breaker, fuse and automatic section switch, in electric power
When the system failure, contacting for photo-voltaic power supply and electric system is disconnected.
As a preferred embodiment, the communication module is GPRS communication, is sent a warning message with to staff.
A kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis method, comprising the following steps:
S1. data acquisition module obtains the historical data of each area's power load amount in historical data base and transmits data to
Data analysis module；
S2. data analysis module analyzes the historical data of each area's power load amount, determines the actual negative in each region
Lotus demand；
The workload demand amount in each region that S3. photo-voltaic power supply distribution module is determined according to data analysis module is set needed for analyzing
The specific distributing position of vertical minimum photo-voltaic power supply and photo-voltaic power supply, and data are stored in data memory module；
S4. when power supply system failure, turn-off module cutting is contacted with this electric system, impedance of the gird-connected inverter to system
Variation is detected, and be will test data and be sent to impedance judgment module；
S5. impedance variations value is compared by impedance judgment module with the impedance variations threshold value being previously set, when impedance variations value
When being less than impedance variations threshold value, warning information sending module does not send a warning message, when impedance variations value is more than impedance variations
When threshold value, warning information sending module is sent a warning message by communication module to staff, and data memory module will be above-mentioned
Information is stored；
S6. the information that itself is stored is transferred to historical data base storage by data memory module.
As a preferred embodiment, step S2 the following steps are included:
S21. several regions are divided into electricity consumption user in platform area；
S22. the average power load amount in divided each region is determined；
S23. by workload demand amount of the average power load amount up-regulation 10 as each region in each region.
As a preferred embodiment, step S3 the following steps are included:
S31. photo-voltaic power supply amount is set up needed for each Region Theory needed for determining each region according to the workload demand amount in each region；
S32. according to electric energy loss during practical electricity consumption, practical light is set up needed for each Region Theory needed for determining each region
Lie prostrate amount, it may be assumed that practical photo-voltaic power supply amount is the sum of electric energy loss amount and theoretical photovoltaic amount.
It therefore, can the invention has the advantages that photovoltaic island power supply can be efficiently used to reach in power supply system failure
To be powered to the load point within the scope of isolated island, guarantees the normal operation of isolated island range internal loading, improve to light energy source
Utilization rate ensure that the safe and stable operation of electric system.
Detailed description of the invention
Attached drawing 1 is a kind of control structure block diagram of the invention.
1- historical data base 2- data acquisition module 3- data analysis module 4- photo-voltaic power supply distribution module 5-
Data memory module 6- photo-voltaic power supply 7- turn-off module 8- gird-connected inverter 9- impedance judgment module 10- alarm letter
Cease sending module 11- communication module.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment:
A kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis system of the present embodiment, as shown in Figure 1, including recording each area
The gird-connected inverter 8 of system impedance variation before and after the historical data base 1 of power load amount, photo-voltaic power supply 6, detection grid cut-off,
Cut off the turn-off module 7 of circuit, impedance judgment module 9, data memory module 5, data acquisition module 2, data analysis module 3,
Photo-voltaic power supply distribution module 4, warning information sending module 10 and communication module 11, the historical data base, data acquisition module
Block, data analysis module, photo-voltaic power supply distribution module and data memory module are sequentially connected, the photo-voltaic power supply, grid-connected inverse
Become device, impedance judgment module, warning information sending module and communication module are sequentially connected, the warning information sending module with
Data memory module connection, the data memory module are connect with historical data base, and the turn-off module and gird-connected inverter connect
It connects.
The present invention is analyzed by the historical data to each area's power load amount, determines the actual load in each region
Demand, the minimum photo-voltaic power supply set up needed for the workload demand amount in each region then determined analyzes and photo-voltaic power supply
Specific distributing position, while the impedance variations of gird-connected inverter detection breaker work front and back system, the judgement of impedance judgment module
Whether photovoltaic island power supply is safe at this time, and warning information sending module is sent a warning message by communication module if dangerous.
The turn-off module includes breaker, fuse and automatic section switch, in electric power system fault, disconnects light
Volt power supply and electric system contact.The communication module is GPRS communication, is sent a warning message with to staff.It is described
Impedance judgment module, data memory module, data acquisition module, data analysis module, photo-voltaic power supply distribution module, warning information
Sending module is the subprocessing module of computer.
A kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis method, comprising the following steps:
S1. data acquisition module obtains the historical data of each area's power load amount in historical data base and transmits data to
Data analysis module；
S2. data analysis module analyzes the historical data of each area's power load amount, determines the actual negative in each region
Lotus demand；
S21. several regions are divided into electricity consumption user in platform area；
S22. the average power load amount in divided each region is determined；
S23. by workload demand amount of the average power load amount up-regulation 10 as each region in each region；
The workload demand amount in each region that S3. photo-voltaic power supply distribution module is determined according to data analysis module is set needed for analyzing
The specific distributing position of vertical minimum photo-voltaic power supply and photo-voltaic power supply, and data are stored in data memory module；
S31. photo-voltaic power supply amount is set up needed for each Region Theory needed for determining each region according to the workload demand amount in each region；
S32. according to electric energy loss during practical electricity consumption, practical light is set up needed for each Region Theory needed for determining each region
Lie prostrate amount, it may be assumed that practical photo-voltaic power supply amount is the sum of electric energy loss amount and theoretical photovoltaic amount；
S4. when power supply system failure, turn-off module cutting is contacted with this electric system, impedance of the gird-connected inverter to system
Variation is detected, and be will test data and be sent to impedance judgment module；
S5. impedance variations value is compared by impedance judgment module with the impedance variations threshold value being previously set, when impedance variations value
When being less than impedance variations threshold value, warning information sending module does not send a warning message, when impedance variations value is more than impedance variations
When threshold value, warning information sending module is sent a warning message by communication module to staff, and data memory module will be above-mentioned
Information is stored；
S6. the information that itself is stored is transferred to historical data base storage by data memory module.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Although be used more herein turn-off module, impedance judgment module, data memory module, data acquisition module,
The terms such as data analysis module, photo-voltaic power supply distribution module, warning information sending module and communication module, but be not precluded and make
A possibility that with other terms.The use of these items is only for be more convenient to describe and explain essence of the invention；It
To be construed to any additional limitation disagreed with spirit of that invention.
Claims (6)
1. a kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis system, it is characterised in that: including recording each area's electricity consumption
Historical data base, photo-voltaic power supply, the gird-connected inverter of detection grid cut-off front and back system impedance variation, cutting circuit of load
Turn-off module, impedance judgment module, data memory module, data acquisition module, data analysis module, photo-voltaic power supply distributed mode
Block, warning information sending module and communication module, the historical data base, data acquisition module, data analysis module, photovoltaic
Power distribution module and data memory module are sequentially connected, and the photo-voltaic power supply, impedance judgment module, is accused at gird-connected inverter
Alert information sending module and communication module are sequentially connected, and the warning information sending module is connect with data memory module, institute
It states data memory module to connect with historical data base, the turn-off module is connect with gird-connected inverter.
2. a kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis system according to claim 1, it is characterized in that described
Turn-off module includes breaker, fuse and automatic section switch.
3. a kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis system according to claim 1, it is characterized in that described
Communication module is GPRS communication.
4. a kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis method, special using any one of claim 1-3 system
Sign be the following steps are included:
S1. data acquisition module obtains the historical data of each area's power load amount in historical data base and transmits data to
Data analysis module；
S2. data analysis module analyzes the historical data of each area's power load amount, determines the actual negative in each region
Lotus demand；
The workload demand amount in each region that S3. photo-voltaic power supply distribution module is determined according to data analysis module is set needed for analyzing
The specific distributing position of vertical minimum photo-voltaic power supply and photo-voltaic power supply, and data are stored in data memory module；
S4. when power supply system failure, turn-off module cutting is contacted with this electric system, impedance of the gird-connected inverter to system
Variation is detected, and be will test data and be sent to impedance judgment module；
S5. impedance variations value is compared by impedance judgment module with the impedance variations threshold value being previously set, when impedance variations value
When being less than impedance variations threshold value, warning information sending module does not send a warning message, when impedance variations value is more than impedance variations
When threshold value, warning information sending module is sent a warning message by communication module to staff, and data memory module will be above-mentioned
Information is stored；
S6. the information that itself is stored is transferred to historical data base storage by data memory module.
5. a kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis method according to claim 4, it is characterized in that step
S2 the following steps are included:
S21. several regions are divided into electricity consumption user in platform area；
S22. the average power load amount in divided each region is determined；
S23. by workload demand amount of the average power load amount up-regulation 10 as each region in each region.
6. a kind of distribute-electricity transformer district distributed photovoltaic power intelligent analysis method according to claim 4, it is characterized in that step
S3 the following steps are included:
S31. photo-voltaic power supply amount is set up needed for each Region Theory needed for determining each region according to the workload demand amount in each region；
S32. according to electric energy loss during practical electricity consumption, practical light is set up needed for each Region Theory needed for determining each region
Lie prostrate amount, it may be assumed that practical photo-voltaic power supply amount is the sum of electric energy loss amount and theoretical photovoltaic amount.
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| CN201711484132.6A CN109474000B (en) | 2017-12-29 | 2017-12-29 | Intelligent analysis system and method for distributed photovoltaic power supply of distribution transformer area |
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Cited By (2)
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| CN113098056A (en) * | 2021-04-02 | 2021-07-09 | 广东技术师范大学 | Photovoltaic converter system for new energy grid connection |
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Address after: Zhejiang city of Jinhua province Sungai 321017 West Road Wucheng District No. 420 Applicant after: JINHUA POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Applicant after: JINHUA POWER TRANSMISSION AND DISTRIBUTION ENGINEERING Co.,Ltd. Address before: Zhejiang city of Jinhua province Sungai 321017 West Road Wucheng District No. 420 Applicant before: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY JINHUA POWER SUPPLY Co. Applicant before: JINHUA POWER TRANSMISSION AND DISTRIBUTION ENGINEERING Co.,Ltd. |
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Inventor after: Jiang Hongliang Inventor after: Sheng Dong Inventor after: Tang Xiaoqian Inventor after: Wang Wei Inventor after: Ye Zhuojuan Inventor after: Shu Jun Inventor after: Liu Jun Inventor after: Ma Kunlong Inventor after: Cao Jianan Inventor before: Jiang Hongliang Inventor before: Sheng Dong Inventor before: Tang Xiaoqian Inventor before: Wang Wei Inventor before: Ye Zhuojuan Inventor before: Shu Jun Inventor before: Liu Jun |
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Effective date of registration: 20200330 Address after: Zhejiang city of Jinhua province Sungai 321017 West Road Wucheng District No. 420 Applicant after: JINHUA POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Address before: Zhejiang city of Jinhua province Sungai 321017 West Road Wucheng District No. 420 Applicant before: JINHUA POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Applicant before: JINHUA POWER TRANSMISSION AND DISTRIBUTION ENGINEERING Co.,Ltd. |
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