CN114866031A - Distributed photovoltaic power generation state monitoring system - Google Patents
Distributed photovoltaic power generation state monitoring system Download PDFInfo
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- CN114866031A CN114866031A CN202210633140.7A CN202210633140A CN114866031A CN 114866031 A CN114866031 A CN 114866031A CN 202210633140 A CN202210633140 A CN 202210633140A CN 114866031 A CN114866031 A CN 114866031A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 116
- 238000010248 power generation Methods 0.000 title claims abstract description 49
- 238000004891 communication Methods 0.000 claims abstract description 84
- 238000012806 monitoring device Methods 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000009529 body temperature measurement Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 6
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- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
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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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- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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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
- H02J3/381—Dispersed generators
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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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
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a distributed photovoltaic power generation state monitoring system, which realizes real-time monitoring and processing of the distribution of key parameters of temperature and illuminance influencing the power generation power of a photovoltaic panel by correspondingly configuring a wireless temperature monitoring device, an illuminance transmitter and a state monitoring terminal on photovoltaic modules which are dispersedly installed in a photovoltaic power station, can realize accurate prediction of the power of the dispersed photovoltaic modules facing a single photovoltaic inverter, and monitors the real-time running state of the photovoltaic power station and identifies running faults by connecting with each state monitoring terminal, a communication network and a master station platform. The invention can effectively improve the economic and reliability levels of photovoltaic power generation and provide important technical support for improving the operation level of a photovoltaic power station.
Description
Technical Field
The invention relates to the field of operation monitoring of large photovoltaic power stations, in particular to a distributed photovoltaic power generation state monitoring system.
Background
With the high-speed development and wide application of renewable energy source-solar photovoltaic grid-connected power generation in China, more urgent needs are provided for accurate prediction of solar photovoltaic power generation power and fault identification and early warning in operation of a photovoltaic power generation system. The large-scale photovoltaic power generation system can realize real-time and accurate measurement of the operating temperature and the received illuminance of each dispersedly installed photovoltaic module only by adopting a distribution mode, and information transmission of the dispersedly installed mode also needs to be realized by means of a communication network. At present, the temperature and illuminance monitoring of a photovoltaic power station mainly adopts a centralized monitoring mode arranged at the corners of the photovoltaic station. The distributed system is used for monitoring the operating temperature and the illuminance of the equipment of the dispersed photovoltaic module, and meanwhile, a method for uploading in real time by adopting different wireless and wired communication modes is not reported.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a distributed photovoltaic power generation state monitoring system for solving the above-mentioned problems occurring in the prior art.
In order to achieve the above and other related objects, the present invention provides a distributed photovoltaic power generation status monitoring system, which is applied to a photovoltaic power station, and comprises: aiming at one or more groups of photovoltaic modules which are dispersedly installed; wherein, every group photovoltaic module includes: one or more single strings of photovoltaic panels; the wireless temperature monitoring devices are respectively arranged on each single string of photovoltaic panels of each group of photovoltaic modules and are used for monitoring the operating temperature data of each corresponding single string of photovoltaic panels; the corresponding photovoltaic modules are respectively provided with an illuminance transmitter, a photovoltaic inverter and a state monitoring terminal; each photovoltaic inverter can exchange electrical operation data in a communication mode; each illuminance transmitter is used for monitoring illuminance data received by the corresponding photovoltaic module; each state monitoring terminal is connected with each wireless temperature monitoring device, each illuminance transmitter and each photovoltaic inverter which are correspondingly configured with the photovoltaic module of the state monitoring terminal, is used for collecting the operating temperature of each single string of photovoltaic panels corresponding to the photovoltaic module and illuminance data received by the photovoltaic module, simultaneously obtains electrical operating data of the corresponding photovoltaic module through communication with the photovoltaic inverters, and sends the state of the corresponding photovoltaic module and the electrical operating monitoring data to the master station platform; wherein the operating condition monitoring data comprises: the photovoltaic power generation method comprises the following steps of (1) operating temperature data of each single string of photovoltaic panels corresponding to a photovoltaic module, illuminance data and electrical operating data received by the corresponding photovoltaic module, and predicting the photovoltaic power generation power of an inverter corresponding to the photovoltaic module; and the master station platform is connected with the state monitoring terminals corresponding to the photovoltaic assemblies and is used for monitoring the real-time running state of the photovoltaic power station and identifying running faults based on the running state monitoring data corresponding to the photovoltaic assemblies.
In an embodiment of the present invention, each of the wireless temperature monitoring devices includes: the temperature measurement sensing module is used for acquiring the operating temperature data of the corresponding single-string photovoltaic panel in real time; the wireless communication component is connected with the temperature measuring sensor and is used for sending the collected operating temperature data in a wireless communication mode; the wired communication component is connected with the temperature measuring sensor and is used for sending the collected operating temperature data in a wired communication mode; and the power supply module is used for supplying power to the temperature measurement sensing module and the wireless communication component.
In an embodiment of the present invention, the wireless communication unit is a wireless transmitting antenna; the wired communication component is a wired communication interface.
In an embodiment of the present invention, each status monitoring terminal includes: the communication module is used for receiving the operating temperature data, the received illuminance data and the electrical operating data of the photovoltaic inverter of each single string of photovoltaic panels corresponding to the same photovoltaic module; the processing module is connected with the communication module and is used for obtaining the running state monitoring data of the corresponding photovoltaic module based on the running temperature data, the received illuminance data and the electrical running data of the photovoltaic inverter of each single string of photovoltaic panels corresponding to the same photovoltaic module; the communication module is also used for sending the running state monitoring data; and the power supply module is used for supplying power to the state monitoring terminal.
In an embodiment of the present invention, the obtaining the operation state monitoring data of the corresponding photovoltaic module based on the operation temperature data, the illuminance data and the electrical operation data of each single string of photovoltaic panels corresponding thereto includes: and predicting the power generation power of the corresponding photovoltaic module based on the operating temperature data of each single string of photovoltaic panels corresponding to the photovoltaic module, the illuminance data corresponding to the photovoltaic module and the electrical operating data of the photovoltaic inverter, and acquiring operating state monitoring data.
In an embodiment of the present invention, the communication mode of the communication module includes: wireless communication systems and wired communication systems.
In an embodiment of the present invention, the communication module includes: the 485 communication interface is used for receiving illuminance data from an illuminance transmitter which is arranged corresponding to the photovoltaic module of the 485 communication interface; the wireless communication interface is used for receiving the operating temperature data of each single string of photovoltaic panels of each wireless temperature monitoring device correspondingly arranged with the photovoltaic module; an inverter network interface for receiving electrical operating data from a photovoltaic inverter corresponding to its photovoltaic module; and the master station network communication interface is used for sending running state monitoring data corresponding to the same photovoltaic module to the master station platform.
In an embodiment of the invention, the power module includes a solar charging device.
In an embodiment of the present invention, the method for identifying the operation failure includes: and identifying the operation faults according to the operation state monitoring data corresponding to each photovoltaic module based on a digital twin algorithm.
In an embodiment of the present invention, each status monitoring terminal is connected to the master platform through a master communication network.
As described above, the distributed photovoltaic power generation state monitoring system of the present invention has the following beneficial effects: the distribution real-time monitoring and processing of key parameters, temperature and illuminance, which affect the power generation power of the photovoltaic panel are realized by the wireless temperature monitoring devices and the state monitoring terminals which are dispersedly installed on the corresponding photovoltaic modules, the accurate power prediction of the dispersed photovoltaic modules facing to a single inverter can be realized, and the real-time running state of the photovoltaic power station is monitored and running faults are identified through a master station platform communicated with the state monitoring terminals. The invention can effectively improve the economic and reliability levels of photovoltaic power generation and provide important technical support for improving the operation level of a photovoltaic power station.
Drawings
Fig. 1 is a schematic view showing a configuration of a distributed photovoltaic power generation state monitoring system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating a principle configuration of a status monitoring terminal according to an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating an information processing flow of the status monitoring terminal according to an embodiment of the present invention.
Fig. 4 is a schematic view illustrating a configuration of a distributed photovoltaic power generation state monitoring system according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It is noted that in the following description, reference is made to the accompanying drawings which illustrate several embodiments of the present invention. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present invention. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present invention is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "below," "lower," "over," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures.
Also, as used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," and/or "comprising," when used in this specification, specify the presence of stated features, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, operations, elements, components, items, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions or operations are inherently mutually exclusive in some way.
The invention provides a distributed photovoltaic power generation state monitoring system, which realizes real-time monitoring and processing of distribution of key parameters, namely temperature and illuminance, which affect the power generation power of a photovoltaic panel through wireless temperature monitoring devices and state monitoring terminals which are dispersedly arranged on corresponding groups of photovoltaic modules, can realize accurate prediction of the power of the dispersed photovoltaic modules facing a single inverter, and monitors the real-time running state of a photovoltaic power station and identifies running faults through a master station platform communicated with the state monitoring terminals. The invention can effectively improve the economic and reliability levels of photovoltaic power generation and provide important technical support for improving the operation level of a photovoltaic power station.
The following detailed description of the embodiments of the present invention will be made with reference to fig. 1 so that those skilled in the art to which the present invention pertains can easily carry out the embodiments. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.
Fig. 1 is a schematic structural diagram of a distributed photovoltaic power generation state monitoring system in an embodiment.
Applying a photovoltaic power station, the distributed photovoltaic power generation state monitoring system comprising:
one or more groups of photovoltaic modules 1 which are dispersedly installed; wherein, every group photovoltaic module includes: one or more single strings of photovoltaic panels 11;
the wireless temperature monitoring devices 2 are respectively arranged on the single strings of photovoltaic panels 11 of each group of photovoltaic modules 1 and are used for monitoring the operating temperature data of each single string of photovoltaic panels of the corresponding photovoltaic module;
the photovoltaic inverter 3, the illuminance transmitter 4 and the state monitoring terminal 5 are respectively arranged corresponding to each group of photovoltaic modules 1; preferably, the photovoltaic inverter 3, the illuminance transmitter 4 and the state monitoring terminal 5 arranged in each group of photovoltaic modules 1 are respectively located in the same region where the corresponding photovoltaic module 1 is installed;
each photovoltaic inverter 3 is used for acquiring and sending electrical operation state data of the photovoltaic inverter;
each illuminance transmitter 4 is used for monitoring illuminance data received by the area where the corresponding photovoltaic module is located;
each state monitoring terminal 5 is connected with each wireless temperature monitoring device 2 and each illuminance transmitter 4 which are arranged corresponding to the same photovoltaic module, and is used for acquiring the electrical operation data of the photovoltaic inverter 6 based on the collected operation temperature data of each single string of photovoltaic panels corresponding to the same photovoltaic module, the illuminance data received by the photovoltaic module and the communication mode, so that the complete operation state monitoring data of the corresponding photovoltaic module is obtained and sent;
wherein the operating condition monitoring data comprises: the method comprises the following steps that operation temperature data of each single string of photovoltaic panels of a corresponding photovoltaic module, illuminance data received by the photovoltaic module, electrical operation data of a corresponding photovoltaic inverter and predicted power generation power of the photovoltaic inverter are obtained;
and the master station platform 6 is connected with the state monitoring terminals 5 corresponding to the photovoltaic assemblies 1 and is used for monitoring the real-time running state of the photovoltaic power station and identifying running faults based on the running state monitoring data corresponding to the photovoltaic assemblies 1.
It should be noted that fig. 1 only exemplifies three groups of photovoltaic modules and each group of photovoltaic modules includes three single strings of photovoltaic panels, and the present application is not limited thereto.
Optionally, each wireless temperature monitoring device 11 takes a single string of photovoltaic panels in a photovoltaic power station as an object, and monitors the operating temperature of the object in real time. Each wireless temperature monitoring device 11 includes: the temperature measurement sensing module is used for acquiring the operating temperature data of the corresponding single-string photovoltaic panel in real time; the wireless communication component is connected with the temperature measuring sensor and is used for sending the collected operating temperature data in a wireless communication mode; the wired communication component is connected with the temperature measuring sensor and is used for sending the collected operating temperature data in a wired communication mode; and the power supply module is used for supplying power to the temperature measurement sensing module and the wireless communication component.
Preferably, the temperature measurement sensing module comprises a data processing unit for collecting the operating temperature of the photovoltaic panel in real time and finishing the judgment and processing of related data; the wireless communication part sends data to the corresponding state monitoring terminal at regular time.
Optionally, the wireless communication component is a wireless transmitting antenna module; the wired communication component is a wired communication interface.
Optionally, the photovoltaic operation state monitoring terminal 5 takes a photovoltaic module corresponding to a single inverter in the photovoltaic power station as an object, and each state monitoring terminal 5 includes: the communication module is used for receiving the operating temperature data, the received illuminance data and the electrical operating data of the photovoltaic inverter of each single string of photovoltaic panels corresponding to the same photovoltaic module; the processing module is connected with the communication module and is used for obtaining complete running state monitoring data of the corresponding photovoltaic module based on the running temperature data, the received illuminance data and the electrical running data of the photovoltaic inverter of each single string of photovoltaic panels corresponding to the same photovoltaic module; the communication module is also used for sending the running state monitoring data; and the power supply module is connected with the processing module and used for supplying power to the state monitoring terminal.
Optionally, the communication mode of the communication module includes: wireless communication systems and wired communication systems. The real-time uploading of scattered temperature parameters and illuminance is realized by adopting different communication modes, and complete data support is provided for the main station to realize the early warning and fault identification of the operation fault of the photovoltaic system.
Optionally, the communication module includes: the 485 communication interface is used for receiving illuminance data from an illuminance transmitter which is arranged corresponding to the photovoltaic module of the 485 communication interface; the wireless communication interface is used for receiving the operating temperature data of each single string of photovoltaic panels of each wireless temperature monitoring device correspondingly arranged with the photovoltaic module; the inverter network interface is used for receiving electrical operation data from a photovoltaic inverter which is arranged corresponding to a photovoltaic component of the inverter network interface; and the master station network communication interface is used for sending running state monitoring data corresponding to the same photovoltaic module to the master station platform.
In a specific embodiment, as shown in fig. 3, the state monitoring terminal includes: the system comprises a power supply module, a microcontroller, a 485 communication interface, a wireless communication interface, an inverter network interface and a master station network communication interface; the power supply module supplies power to the microcontroller, receives actual temperature state data of each related photovoltaic group string through the wireless network interface, receives actual illuminance state data of the illuminance transmitter 4 through the 485 communication interface, simultaneously acquires voltage and current data of the inverter through the inverter network interface, acquires running state monitoring data of the corresponding photovoltaic module through the microcontroller and sends the running state monitoring data to the master station platform through the main communication network interface.
Optionally, the power module includes a solar charging device. For example, as shown in fig. 3, a solar battery is used to obtain solar energy for charging.
Optionally, the obtaining of the operating state monitoring data of the corresponding photovoltaic module based on the operating temperature data of each single string of photovoltaic panels of the corresponding photovoltaic module, the received illuminance data, and the electrical operating data of the photovoltaic inverter includes: predicting the photovoltaic power of the corresponding photovoltaic inverter according to the operating temperature data, the received illuminance data and the electrical operating data of each single string of photovoltaic panels corresponding to the same photovoltaic module; and acquiring complete running state monitoring data based on the running temperature data, the received illuminance data, the electric running data of the photovoltaic inverter and the predicted power generation power of the photovoltaic inverter of each single string of photovoltaic panels corresponding to the same photovoltaic module.
In a specific embodiment, as shown in fig. 4, the state monitoring terminal performs operation state analysis and photovoltaic power prediction of the corresponding photovoltaic inverter based on the basic parameters of the photovoltaic module, the operating temperature data of each single string of photovoltaic panels acquired by the wireless temperature monitoring device corresponding to the photovoltaic module, the illuminance data received by the photovoltaic module corresponding to the illuminance transmitter and the electrical operating data acquired by the photovoltaic inverter, and then sends the received data and the predicted photovoltaic power of the photovoltaic inverter to the master station software background.
Optionally, the master station platform 6 is configured in a master station of the photovoltaic power station, and is configured to collect operation state monitoring data of all inverters and related photovoltaic modules in the whole photovoltaic power station. The fault detection and fault identification in the operation of the photovoltaic power station system can be realized through a digital twin algorithm based on the running state monitoring data of each photovoltaic module.
Optionally, each state monitoring terminal is connected to the master station platform through a master station communication network.
In order to better describe the distributed photovoltaic power generation state monitoring system, the following specific embodiments are provided for illustration;
example 1: a distributed photovoltaic power generation state monitoring system; fig. 4 is a schematic structural diagram of the distributed photovoltaic power generation state monitoring system according to the present embodiment.
The distributed photovoltaic power generation state monitoring system comprises: the photovoltaic power generation system comprises photovoltaic group strings 1 which are installed in a dispersed mode, distributed wireless temperature monitoring devices 2 facing single photovoltaic plates, a wireless communication network 3, an illuminance transmitter 4 facing an inverter, a photovoltaic module running state monitoring terminal 5, a master station communication network 7 and a monitoring master station platform 8 facing the whole photovoltaic power station.
The distributed wireless temperature monitoring devices 2 are respectively arranged on the corresponding dispersed photovoltaic string 1, monitor the operating temperature of each photovoltaic string in real time, and regularly transmit the operating state data of the equipment to the state monitoring terminal 5 through the wireless network 3; the illuminance transmitter 4 monitors the illuminance received by the photovoltaic module in the area and transmits the illuminance to the state monitoring terminal 5 through 485 communication; meanwhile, the state monitoring terminal 5 can also collect electrical operation data corresponding to the photovoltaic inverter 6 in a communication mode, realize accurate power prediction of a single inverter through the operation state monitoring data, and send all the devices and the electrical operation data of the group and the predicted accurate power to the master station platform 8 through the master communication network 7; the master station platform 8 monitors the running state of the whole photovoltaic power station, and can realize fault detection and fault identification of the running of a photovoltaic power station system through a digital twinning algorithm based on real-time state monitoring data.
The main benefits of this embodiment are:
1) the distribution of key parameters of temperature and illuminance, which affect the power generation power of the photovoltaic panel, is monitored and processed in real time, and the power of the dispersed photovoltaic module facing to a single inverter can be accurately predicted.
2) The real-time uploading of scattered temperature parameters and illuminance is realized by adopting different communication modes, and complete data support is provided for the main station to realize the early warning and fault identification of the operation fault of the photovoltaic system.
In summary, the distributed photovoltaic power generation state monitoring system of the invention realizes real-time monitoring and processing of the distribution of key parameters, temperature and illuminance, affecting the power generation power of the photovoltaic panel through the wireless temperature monitoring devices and the state monitoring terminals which are dispersedly installed corresponding to each group of photovoltaic modules, can realize accurate prediction of the power of the dispersed photovoltaic modules facing a single inverter, and monitors the real-time operation state of the photovoltaic power station and identifies the operation fault through the master station platform which is communicated with each state monitoring terminal. The invention can effectively improve the economic and reliability levels of photovoltaic power generation and provide important technical support for improving the operation level of a photovoltaic power station. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a distributed photovoltaic power generation state monitoring system which characterized in that is applied to a photovoltaic power plant, the system includes:
aiming at one or more groups of photovoltaic modules which are dispersedly installed; wherein, every group photovoltaic module includes: one or more single strings of photovoltaic panels;
the wireless temperature monitoring devices are respectively arranged on each single string of photovoltaic panels of each group of photovoltaic modules and are used for monitoring the operating temperature data of each corresponding single string of photovoltaic panels;
a photovoltaic inverter, a illuminance transmitter and a state monitoring terminal are respectively configured corresponding to each group of photovoltaic modules; wherein,
each photovoltaic inverter exchanges electrical operation data in a communication mode;
each illuminance transmitter is used for monitoring illuminance data received by the corresponding photovoltaic module;
each state monitoring terminal is connected with each wireless temperature monitoring device, each illuminance transmitter and each photovoltaic inverter which are correspondingly configured with the photovoltaic module of the state monitoring terminal, is used for collecting the operating temperature of each single string of photovoltaic panels corresponding to the photovoltaic module and the illuminance received by the photovoltaic module, simultaneously obtains the electrical operation data of the corresponding photovoltaic module through communication with the photovoltaic inverters, and sends the state of the corresponding photovoltaic module and the electrical operation monitoring data to the master station platform; wherein the operating condition monitoring data comprises: the photovoltaic power generation method comprises the following steps of (1) operating temperature data of each single string of photovoltaic panels corresponding to a photovoltaic module, illuminance data and electrical operating data received by the corresponding photovoltaic module, and predicting the photovoltaic power generation power of an inverter corresponding to the photovoltaic module;
and the master station platform is connected with the state monitoring terminals corresponding to the photovoltaic assemblies and is used for monitoring the real-time running state of the photovoltaic power station and identifying running faults based on the running state monitoring data corresponding to the photovoltaic assemblies.
2. The distributed photovoltaic power generation state monitoring system of claim 1, wherein each wireless temperature monitoring device comprises:
the temperature measurement sensing module is used for acquiring the operating temperature data of the corresponding single-string photovoltaic panel in real time;
the wireless communication component is connected with the temperature measuring sensor and is used for sending the collected operating temperature data in a wireless communication mode;
the wired communication component is connected with the temperature measuring sensor and is used for sending the collected operating temperature data in a wired communication mode;
and the power supply module is used for supplying power to the temperature measurement sensing module and the wireless communication component.
3. The distributed photovoltaic power generation state monitoring system of claim 2, wherein the wireless communication component is a wireless transmitting antenna; the wired communication component is a wired communication interface.
4. The distributed photovoltaic power generation state monitoring system according to claim 1, wherein each state monitoring terminal comprises:
the communication module is used for receiving the operating temperature data of each single string of photovoltaic panels corresponding to the photovoltaic assembly, and receiving the illuminance data and the electrical operating data corresponding to the photovoltaic assembly;
the processing module is connected with the communication module and used for obtaining the running state monitoring data of the corresponding photovoltaic assembly based on the running temperature data, the illuminance data and the electrical running data of each single string of photovoltaic panels corresponding to the processing module;
the communication module is also used for sending the running state monitoring data;
and the power supply module is used for supplying power to the state monitoring terminal.
5. The distributed photovoltaic power generation state monitoring system according to claim 4, wherein the obtaining the operating state monitoring data of the corresponding photovoltaic module based on the operating temperature data, the illuminance data and the electrical operating data of each single string of photovoltaic panels corresponding thereto comprises:
and predicting the power generation power of the corresponding photovoltaic module based on the operating temperature data of each single string of photovoltaic panels corresponding to the photovoltaic module, the illuminance data corresponding to the photovoltaic module and the electrical operating data of the photovoltaic inverter, and acquiring operating state monitoring data.
6. The distributed photovoltaic power generation state monitoring system according to claim 4, wherein the communication mode of the communication module comprises: wireless communication systems and wired communication systems.
7. The distributed photovoltaic power generation state monitoring system of claim 6, wherein the communication module comprises:
the 485 communication interface is used for receiving illuminance data from an illuminance transmitter which is correspondingly configured with the same photovoltaic module;
the wireless communication interface is used for receiving the operating temperature data of each single-string photovoltaic panel of each wireless temperature monitoring device corresponding to the photovoltaic component of the wireless communication interface;
an inverter network interface for receiving electrical operating data from a photovoltaic inverter corresponding to its photovoltaic module;
and the master station network communication interface is used for sending running state monitoring data corresponding to the photovoltaic module to the master station platform.
8. The distributed photovoltaic power generation state monitoring system of claim 4, wherein the power module comprises a solar charging device.
9. The distributed photovoltaic power generation state monitoring system according to claim 1, wherein the means for identifying an operational failure comprises:
and identifying the operation faults based on the operation state monitoring data corresponding to each photovoltaic module based on a digital twin algorithm.
10. The distributed photovoltaic power generation state monitoring system according to claim 1, wherein each state monitoring terminal is connected with the master station platform through a master station communication network.
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