CN117424556A - Photovoltaic power generation dispatching system based on station loss analysis - Google Patents
Photovoltaic power generation dispatching system based on station loss analysis Download PDFInfo
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- H—ELECTRICITY
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- 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
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- 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
- H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- 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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- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- 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
- H02J3/004—Generation forecast, e.g. methods or systems for forecasting future energy generation
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- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
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- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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- 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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Abstract
The invention discloses a photovoltaic power generation dispatching system based on station loss analysis, which comprises: the method comprises the steps that weather data affecting the power generation capacity of a photovoltaic module are obtained by a weather information obtaining module, and operation data and actual power generation capacity data of the photovoltaic module are detected by a module information obtaining module; the generating capacity analysis module calculates theoretical generating capacity of the photovoltaic module by using meteorological data and operation data, and analyzes the theoretical generating capacity and the actual generating capacity to generate a generating capacity analysis result; the dust simulation module simulates the degree of dust coverage of the photovoltaic module based on meteorological data and operation data, and calculates effective area data at each moment; the abnormal confirmation module predicts the generating capacity of the photovoltaic module through the actual effective area data, and determines the running state of the photovoltaic module according to the generating capacity analysis result to generate a scheduling instruction; the scheduling module receives the instruction and sends a corresponding scheduling scheme to a manager; the invention reduces detection equipment, simplifies analysis process, ensures accuracy of analysis result, and can schedule loss in time.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic power generation dispatching system based on station loss analysis.
Background
Solar energy is a clean, safe renewable energy source and has an important role in long-term energy strategies. Factors such as temperature, dust and pollution, shielding, assembly orientation and inclination, inverter efficiency, cable loss and the like need to be considered when estimating the output electric energy of the photovoltaic power station. All the above factors can cause more or less derating to the photovoltaic power station, thereby causing loss of output electric energy of the photovoltaic system; the main factors influencing the electric energy loss of the photovoltaic station are atmospheric dust, the dust is an uneven dispersion system composed of particles suspended in air, different areas are different, in addition, the air flow is the power of particle diffusion and migration, and the physical property, the chemical property and the biological property of the dust are different, so that the adhesion effect of the dust and the photovoltaic module is also various, and meanwhile, the adhesion rate of the dust is also related to the installation angle of the photovoltaic module;
however, in the practical application process, field station loss is caused by two factors, namely the failure of the photovoltaic module and dust coverage; in order to find out the two factors in time, the prior art mostly installs detection devices in and on the surface of the photovoltaic module, and separately analyzes factors of station loss; the scheme has complex analysis process, large investment in the early stage and is not beneficial to the economy of the operation of the photovoltaic station;
therefore, how to provide a photovoltaic power generation dispatching system based on station loss analysis, which can reduce detection equipment, simplify analysis process, ensure accuracy of analysis result and timely dispatch loss, is a problem to be solved in the art.
Disclosure of Invention
In order to solve the problems, the invention provides the following technical scheme:
a photovoltaic power generation scheduling system based on station loss analysis, comprising:
the weather information acquisition module is used for acquiring weather data affecting the power generation capacity of the photovoltaic module in the station;
the assembly information acquisition module is connected with each photovoltaic assembly in the station and is used for detecting operation data and actual power generation data of each photovoltaic assembly;
the generating capacity analysis module is connected with the meteorological information acquisition module and the assembly information acquisition module and is used for calculating ideal generating capacity data of each photovoltaic assembly within a preset time limit through the detected meteorological data and operation data, analyzing the difference between the ideal generating capacity data and the actual generating capacity data and generating a generating capacity analysis result;
the dust simulation module is connected with the meteorological information acquisition module and the assembly information acquisition module and is used for simulating the area of dust covering the photovoltaic assemblies according to meteorological data and operation data and calculating actual effective area data of each photovoltaic assembly at each moment;
the abnormal confirmation module is connected with the generated energy analysis module and the dust simulation module and is used for predicting the generated energy of each photovoltaic module according to the actual effective area data, determining the running state of each photovoltaic module by combining the generated energy analysis result and generating a corresponding scheduling instruction;
and the scheduling module is connected with the abnormal confirmation module and is used for receiving the scheduling instruction and sending a corresponding scheduling scheme to the manager according to the scheduling instruction.
Preferably, in the photovoltaic power generation scheduling system based on station loss analysis, the weather information acquisition module includes:
an illumination intensity detection unit for detecting illumination intensity data of the day in the station;
a dust concentration detection unit for detecting dust concentration data of the day in the station;
a wind power detection unit for detecting wind direction information and wind speed data of the day in the station;
and a temperature and humidity detection unit for detecting temperature data and humidity data of the day in the station.
Preferably, in the photovoltaic power generation scheduling system based on station loss analysis, the module information obtaining module includes:
the rated power acquisition unit is used for acquiring rated power data of each photovoltaic module in the station;
an ideal area acquisition unit for acquiring ideal effective area data of each photovoltaic module in the station in a non-shielded state;
the actual power generation amount detection unit is arranged at the output end of each photovoltaic module and is used for detecting actual power generation amount data of each photovoltaic module;
and the angle acquisition unit is arranged on each photovoltaic module and used for acquiring the angle data of each photovoltaic module.
Preferably, in the photovoltaic power generation scheduling system based on station loss analysis, the power generation amount analysis module includes:
an ideal power generation amount calculation unit connected with the illumination intensity detection unit, the rated power acquisition unit and the ideal area acquisition unit, and used for substituting the detected rated power data, ideal effective area data and sunlight intensity data of each photovoltaic module into a preset ideal power generation amount calculation model to calculate an ideal power generation amount E0 within a preset time limit;
an actual power generation amount confirmation unit connected to the actual power generation amount detection unit for acquiring the actual power generation amount Et detected by the actual power generation amount detection unit within the preset time period;
a difference calculation unit connected to the ideal power generation amount calculation unit and the actual power generation amount confirmation unit, for calculating a difference value δe between the actual power generation amount Et and the ideal power generation amount E0 within the preset time period;
an abnormality confirmation unit connected to the difference calculation unit; the abnormal confirmation unit is preset with a difference standard range, compares a difference value delta E with the difference standard range and generates a generating capacity analysis result according to a comparison result;
when the difference value delta E exceeds the difference standard range, generating a generated energy analysis result to be abnormal power generation;
and when the difference value delta E does not exceed the difference standard range, generating a generated energy analysis result to be normal power generation.
Preferably, in the photovoltaic power generation scheduling system based on station loss analysis, the preset ideal power generation amount calculation model is e0=p0×s0×g0×t;
wherein T is a preset time limit, G is illumination intensity data, S0 is ideal effective area data, P0 is rated power data, and E0 is ideal power generation amount within the preset time limit T.
Preferably, in the photovoltaic power generation dispatching system based on station loss analysis, the dust simulation module includes:
an adhesion acquisition unit connected with the dust concentration detection unit, the wind power detection unit and the temperature and humidity detection unit and used for calculating daily dust adhesion data according to the daily dust concentration data, the wind speed data, the temperature data and the humidity data;
the attaching quantity acquisition unit is connected with the attaching force acquisition unit, the wind power detection unit and the angle acquisition unit and is used for calculating the attaching quantity of dust capable of accumulating on the surface of each photovoltaic module in unit time according to dust attaching force data, wind direction data and angle data of each photovoltaic module;
an actual area calculation unit connected to the adhering amount acquisition unit and the ideal area acquisition unit for calculating actual effective area data St.
Preferably, in the photovoltaic power generation scheduling system based on station loss analysis, the calculation process of the actual effective area data includes:
the actual effective area data st=s0- (x×t); s0 is ideal effective area data of the photovoltaic module, X is the attachment quantity of dust accumulated on the surface of the photovoltaic module in unit time, T is a preset time limit, and St is actual effective area data of the surface of the photovoltaic module in the preset time limit T.
Preferably, in the photovoltaic power generation scheduling system based on station loss analysis, the anomaly confirmation module includes:
the time acquisition unit is used for acquiring a time difference value from the illumination initial time to the current time;
the data substitution unit is connected with the time acquisition unit, the actual power generation amount confirmation unit and the actual area calculation unit and is used for substituting the time difference value into the preset ideal power generation amount calculation model as a preset time limit T to calculate the ideal power generation amount E0 of each photovoltaic module before the moment; substituting the time difference value as a preset time limit T into the actual area calculation unit to calculate actual effective area data St of each photovoltaic module at the moment;
the first analysis unit is connected with the abnormality confirmation unit and is used for acquiring an electricity generation amount analysis result; generating a judging instruction when the generated energy analysis result is abnormal generation;
the second analysis unit is connected with the first analysis unit, the actual power generation amount confirming unit and the actual area calculating unit and is used for substituting the effective area data St at the moment into the preset ideal power generation amount calculating model when a judging instruction is received, and calculating the predicted ideal power generation amount E1 of each photovoltaic module before the moment; comparing and judging the difference between the predicted ideal power generation amount E1 and the actual power generation amount Et to generate an operation analysis result;
when Et is more than or equal to E1, generating an operation analysis result to be component dust coverage, and inserting actual effective area data St of the photovoltaic component into the result;
when Et is smaller than E1, generating an operation analysis result to be a component equipment fault;
the instruction generation unit is connected with the second analysis unit and is used for receiving the operation analysis result and generating scheduling instructions in a grading manner;
when the operation analysis result received by the instruction generating unit is component dust coverage, generating a primary scheduling instruction;
and when the operation analysis result received by the instruction generating unit is component equipment failure, generating a secondary scheduling instruction.
Preferably, in the photovoltaic power generation scheduling system based on station loss analysis, the scheduling module includes:
an instruction receiving unit connected with the instruction generating unit and used for receiving the scheduling instruction and generating corresponding alarm information; when the instruction receiving unit receives a primary scheduling instruction, the actual effective area data St carried by the primary scheduling instruction and the position information of the photovoltaic module are used as alarm information to be sent to terminal equipment of a manager; when the instruction receiving unit receives the secondary scheduling instruction, the position information of the photovoltaic module carried by the secondary scheduling instruction is used as alarm information to be sent to terminal equipment of management personnel;
the terminal equipment is connected with the instruction receiving unit and is carried by a manager; and when the terminal equipment receives the alarm information, classifying each alarm information, wherein the set top does not carry the alarm information of the actual effective area data St.
Preferably, in the photovoltaic power generation scheduling system based on station loss analysis, the scheduling module further includes:
when a primary scheduling instruction is received, the power generation of the photovoltaic module is automatically reduced, and the power generation is used as rated power data P0 to be sent to the ideal power generation amount calculation unit to participate in calculating the ideal power generation amount at the next moment.
According to the technical scheme, compared with the prior art, the application has the beneficial effects that:
the invention discloses a photovoltaic power generation dispatching system based on station loss analysis, which comprises: the method comprises the steps that weather data affecting the power generation capacity of a photovoltaic module are obtained by a weather information obtaining module, and operation data and actual power generation capacity data of the photovoltaic module are detected by a module information obtaining module; the generating capacity analysis module calculates theoretical generating capacity of the photovoltaic module by using meteorological data and operation data, and analyzes the theoretical generating capacity and the actual generating capacity to generate a generating capacity analysis result; the dust simulation module simulates the degree of dust coverage of the photovoltaic module based on meteorological data and operation data, and calculates effective area data at each moment; the abnormal confirmation module predicts the generating capacity of the photovoltaic module through the actual effective area data, and determines the running state of the photovoltaic module according to the generating capacity analysis result to generate a scheduling instruction; the scheduling module receives the instruction and sends a corresponding scheduling scheme to a manager; the invention reduces detection equipment, simplifies analysis process, ensures accuracy of analysis result, and can schedule loss in time.
In general, the system utilizes a plurality of modules to acquire and analyze meteorological data, operation data and power generation data, simulate dust coverage conditions of the photovoltaic module, and realize monitoring and scheduling of the photovoltaic module. Through analysis results and a scheduling scheme, a manager can better manage the photovoltaic power station, and the power generation efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the system of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In one embodiment, referring to fig. 1, a photovoltaic power generation scheduling system based on station loss analysis, comprising:
the weather information acquisition module is used for acquiring weather data affecting the power generation capacity of the photovoltaic module in the station;
the assembly information acquisition module is connected with each photovoltaic assembly in the station and is used for detecting operation data and actual power generation data of each photovoltaic assembly;
the generating capacity analysis module is connected with the meteorological information acquisition module and the assembly information acquisition module and is used for calculating ideal generating capacity data of each photovoltaic assembly in a preset time limit through the detected meteorological data and operation data, analyzing the difference between the ideal generating capacity data and the actual generating capacity data and generating a generating capacity analysis result;
the dust simulation module is connected with the meteorological information acquisition module and the component information acquisition module and is used for simulating the area of dust covering the photovoltaic components according to meteorological data and operation data and calculating actual effective area data of each photovoltaic component at each moment;
the abnormal confirmation module is connected with the power generation amount analysis module and the dust simulation module and is used for predicting the power generation amount of each photovoltaic module according to the actual effective area data, determining the running state of each photovoltaic module according to the power generation amount analysis result and generating a corresponding scheduling instruction;
the scheduling module is connected with the abnormality confirmation module and is used for receiving the scheduling instruction and sending a corresponding scheduling scheme to the manager according to the scheduling instruction.
The principle of the above embodiment is: the meteorological information acquisition module is used for acquiring meteorological data, such as illumination intensity, temperature, humidity, wind direction, wind speed and the like, which influence the generated energy of the photovoltaic module in the station; the module information acquisition module is connected with the photovoltaic modules to collect operation data and actual power generation data, such as rated power, angle and the like, of each photovoltaic module; the generating capacity analysis module inputs the data of the meteorological information acquisition module and the assembly information acquisition module into the module, obtains ideal generating capacity data of each photovoltaic assembly in a preset time limit through calculation and analysis, compares the ideal generating capacity data with actual generating capacity data, and generates a generating capacity analysis result; the dust simulation module simulates the coverage area of dust on the photovoltaic modules by using meteorological information and module operation data, and calculates actual effective area data of each photovoltaic module at different moments; the abnormal confirmation module predicts the generated energy of each photovoltaic module according to the actual effective area data through connection with the generated energy analysis module and the dust simulation module, and determines the running state of each photovoltaic module by combining the generated energy analysis result to generate a corresponding scheduling instruction; the scheduling module is connected with the abnormality confirmation module, receives the scheduling instruction, generates a corresponding scheduling scheme according to the instruction, and sends scheduling information to the manager.
The beneficial effects of the embodiment are as follows: through generating capacity analysis and dust simulation, the system can accurately evaluate the cause of the generating capacity loss of the photovoltaic module, and an optimization scheme is provided to improve the generating efficiency of the photovoltaic generating station to the greatest extent; by collecting and analyzing meteorological data, assembly operation data and dust coverage in real time, the system can monitor the state of the photovoltaic assembly in real time, forecast the change of the generated energy and make scheduling decisions in advance; and a scheduling instruction is automatically generated and sent to a manager, so that the automatic scheduling and management of the photovoltaic power generation station are realized, the manual intervention is reduced, and the operation efficiency is improved.
In order to further optimize the above technical solution, referring to fig. 1, a photovoltaic power generation scheduling system based on station loss analysis, a weather information acquisition module includes:
an illumination intensity detection unit for detecting illumination intensity data of the day in the station;
a dust concentration detection unit for detecting dust concentration data of the day in the station;
a wind power detection unit for detecting wind direction information and wind speed data of the day in the station;
and a temperature and humidity detection unit for detecting temperature data and humidity data of the day in the station.
The illumination intensity detection unit can accurately detect illumination intensity data of the station on the day, the dust concentration detection unit can acquire dust concentration data of the station on the day, the wind power detection unit can acquire wind direction information and wind speed data of the station on the day, and the temperature and humidity detection unit can acquire temperature data and humidity data of the station on the day; these data are important factors affecting the power generation amount of the photovoltaic module, and by accurately acquiring these data, the power generation amount analysis and scheduling operation can be effectively performed.
In order to further optimize the above technical solution, referring to fig. 1, a photovoltaic power generation scheduling system based on station loss analysis, a component information obtaining module includes:
the rated power acquisition unit is used for acquiring rated power data of each photovoltaic module in the station;
an ideal area acquisition unit for acquiring ideal effective area data of each photovoltaic module in the station in a non-shielded state;
the actual power generation amount detection unit is arranged at the output end of each photovoltaic module and is used for detecting actual power generation amount data of each photovoltaic module;
and the angle acquisition unit is arranged on each photovoltaic module and used for acquiring the angle data of each photovoltaic module.
It should be noted that, this embodiment obtains accurate rated power data, determines ideal effective area data, monitors actual generated energy in real time and obtains angle data and analyzes, can regard as the benchmark that calculates ideal generated energy and compares with actual generated energy to and according to photovoltaic module's orientation and inclination can influence its condition of receiving light, through obtaining angle data, can analyze photovoltaic module's orientation, further evaluate the cause of generated energy loss.
In order to further optimize the above technical solution, referring to fig. 1, a photovoltaic power generation scheduling system based on station loss analysis, a power generation amount analysis module includes:
an ideal power generation amount calculation unit connected with the illumination intensity detection unit, the rated power acquisition unit and the ideal area acquisition unit, and used for substituting the rated power data, the ideal effective area data and the sunlight intensity data of each detected photovoltaic module into a preset ideal power generation amount calculation model to calculate an ideal power generation amount E0 within a preset time limit;
an actual power generation amount confirmation unit connected with the actual power generation amount detection unit and used for obtaining the actual power generation amount Et detected by the actual power generation amount detection unit within a preset time limit;
a difference calculation unit connected to the ideal power generation amount calculation unit and the actual power generation amount confirmation unit for calculating a difference value δe between the actual power generation amount Et and the ideal power generation amount E0 within the preset time period;
an abnormality confirmation unit connected to the difference calculation unit; the abnormality confirmation unit is preset with a difference standard range, compares the difference value delta E with the difference standard range, and generates a generating capacity analysis result according to the comparison result;
when the difference value delta E exceeds the difference standard range, generating a generated energy analysis result to be abnormal power generation;
when the difference value delta E does not exceed the difference standard range, generating a generated energy analysis result to be normal power generation;
it should be noted that, the preset ideal power generation calculation model is e0=p0×s0×g0×t; wherein T is a preset time limit, G is illumination intensity data, S0 is ideal effective area data, P0 is rated power data, and E0 is ideal power generation amount in the preset time limit T;
according to the embodiment, the ideal power generation amount E0 of each photovoltaic module in the preset time limit can be accurately calculated by substituting the illumination intensity data, the rated power data and the ideal effective area data into the preset ideal power generation amount calculation model through the ideal power generation amount calculation unit; thus, accurate reference data can be provided for subsequent generated energy analysis; the abnormal confirmation unit presets a difference standard range, and can judge whether the generated energy is abnormal or not by comparing the difference value delta E with the difference standard range; when the difference value delta E exceeds the difference standard range, generating a generated energy analysis result to be abnormal power generation; when the difference value delta E does not exceed the difference standard range, generating a generated energy analysis result to be normal power generation; therefore, whether the generated energy has abnormal conditions or not can be rapidly confirmed, and the basis of the generated energy abnormal early warning and scheduling decision is provided.
In order to further optimize the above technical solution, please refer to fig. 1, a photovoltaic power generation dispatching system based on station loss analysis, the dust simulation module includes:
an adhesion acquisition unit connected with the dust concentration detection unit, the wind power detection unit and the temperature and humidity detection unit and used for calculating the daily dust adhesion data according to the daily dust concentration data, the wind speed data, the temperature data and the humidity data;
the attaching quantity acquisition unit is connected with the attaching force acquisition unit, the wind power detection unit and the angle acquisition unit and is used for calculating the attaching quantity of dust which can be accumulated on the surface of each photovoltaic module in unit time according to dust attaching force data, wind direction data and angle data of each photovoltaic module;
an actual area calculation unit connected to the adhesion amount acquisition unit and the ideal area acquisition unit for calculating actual effective area data St;
it should be noted that the calculation process of the actual effective area data includes:
actual effective area data st=s0- (x×t); s0 is ideal effective area data of the photovoltaic module, X is the attachment quantity of dust accumulated on the surface of the photovoltaic module in unit time, T is a preset time limit, and St is actual effective area data of the surface of the photovoltaic module in the preset time limit T.
The calculation principle of the adhesion force and the adhesion quantity in the embodiment is the prior art means; the actual effective area data is accurately calculated by acquiring the dust adhesion force and adhesion quantity data, and an accurate data base is provided; the influence degree of dust on the generated energy of the photovoltaic module can be estimated through calculation of the actual effective area, so that the problem of energy loss caused by dust accumulation can be identified and solved; the dust simulation module is used, so that a manager can know the dust covering condition of the surface of the photovoltaic module in time, a maintenance plan and a cleaning schedule are better formulated, and the operation and maintenance efficiency is improved; the actual effective area data provided by the dust simulation module can be used for predicting and optimally dispatching the generated energy so as to utilize the generating potential of the photovoltaic module to the greatest extent, improve the overall benefit of the power station, and be beneficial to optimizing the predicting of the generated energy, assisting abnormal confirmation and dispatching decision, thereby improving the generating efficiency and reliability of the photovoltaic power station.
In order to further optimize the above technical solution, referring to fig. 1, a photovoltaic power generation scheduling system based on station loss analysis, an anomaly confirmation module includes:
the time acquisition unit is used for acquiring a time difference value from the illumination initial time to the current time;
the data substitution unit is connected with the time acquisition unit, the actual power generation amount confirmation unit and the actual area calculation unit and is used for substituting the time difference value as a preset time limit T into a preset ideal power generation amount calculation model to calculate the ideal power generation amount E0 of each photovoltaic module before the moment; substituting the time difference value as a preset time limit T into an actual area calculation unit to calculate actual effective area data St of each photovoltaic module at the moment;
the first analysis unit is connected with the abnormality confirmation unit and is used for acquiring an electricity generation amount analysis result; generating a judging instruction when the generated energy analysis result is abnormal generation;
the second analysis unit is connected with the first analysis unit, the actual power generation amount confirming unit and the actual area calculating unit and is used for substituting the effective area data St at the moment into a preset ideal power generation amount calculating model when a judging instruction is received, and calculating the predicted ideal power generation amount E1 of each photovoltaic module before the moment; comparing and judging the difference between the predicted ideal power generation amount E1 and the actual power generation amount Et to generate an operation analysis result;
when Et is more than or equal to E1, generating an operation analysis result to be component dust coverage, and inserting actual effective area data St of the photovoltaic component into the result;
when Et is smaller than E1, generating an operation analysis result to be a component equipment fault;
the instruction generation unit is connected with the second analysis unit and is used for receiving the operation analysis result and generating scheduling instructions in a grading manner;
when the operation analysis result received by the instruction generating unit is component dust coverage, generating a primary scheduling instruction;
and when the operation analysis result received by the instruction generating unit is a component equipment fault, generating a secondary scheduling instruction.
When Et is more than or equal to E1, dust exists on the surface of the photovoltaic module, but the dust coverage is lower than or equal to the preset amount, and a primary dispatching instruction is generated; when Et < E1, dust exists on the surface of the photovoltaic module, and meanwhile, the problem of equipment failure of the photovoltaic module possibly occurs, so that the actual power is lower than a predicted value, and a secondary dispatching instruction is generated; the importance degree of the second-level scheduling instruction is higher than that of the first-level scheduling instruction; the embodiment can judge the abnormal condition of power generation in real time, generate an operation analysis result and provide a corresponding scheduling instruction; the method is beneficial to quickly finding and processing abnormal conditions in the photovoltaic power generation system, so that the power generation loss is reduced to the greatest extent, and the stability and performance of the system are improved.
In order to further optimize the above technical solution, please refer to fig. 1, a photovoltaic power generation scheduling system based on station loss analysis, the scheduling module includes:
an instruction receiving unit connected with the instruction generating unit and used for receiving the scheduling instruction and generating corresponding alarm information; when the instruction receiving unit receives a primary scheduling instruction, the actual effective area data St carried by the primary scheduling instruction and the position information of the photovoltaic module are used as alarm information to be sent to terminal equipment of a manager; when the instruction receiving unit receives the secondary scheduling instruction, the position information of the photovoltaic module carried by the instruction receiving unit is used as alarm information to be sent to terminal equipment of a manager;
the terminal equipment is connected with the instruction receiving unit and is carried by a manager; when the terminal equipment receives the alarm information, the terminal equipment classifies the alarm information, and the set top does not carry the alarm information of the actual effective area data St.
It should be noted that, the embodiment can enable the manager to acquire the information of abnormal power generation state and equipment failure in time, so that the manager is more concerned about the situation that the cleaning or maintenance of the photovoltaic module is required and the emergency situation of the equipment failure; and the terminal equipment receives the alarm information, so that a manager can immediately take corresponding measures to minimize the power generation loss and ensure the normal operation of the photovoltaic power generation system.
In order to further optimize the above technical solution, referring to fig. 1, a photovoltaic power generation scheduling system based on station loss analysis, the scheduling module further includes:
when a primary scheduling instruction is received, the power generation of the photovoltaic module is automatically reduced, and the power generation is used as rated power data P0 to an ideal power generation amount calculation unit to participate in calculating the ideal power generation amount at the next moment.
It should be noted that, the embodiment can effectively cope with the abnormal power generation state or the requirement of cleaning and maintenance of the photovoltaic module, so as to reduce the power generation loss caused by abnormal operation to the greatest extent; the method comprises the steps of carrying out a first treatment on the surface of the The calculation accuracy of the ideal power generation amount at the next moment can be ensured, and rated power data is updated according to the reduced actual power generation power, so that the calculation result is more in line with the actual situation; through dynamic adjustment of the power generation power, the normal operation of the photovoltaic power generation system can be guaranteed to the greatest extent, the power generation efficiency and stability are improved, and further, the accuracy of power generation calculation and the optimization effect of scheduling decisions are improved.
It should be noted that, in the system provided in the foregoing embodiment, only the division of the foregoing functional modules is illustrated, in practical application, the foregoing functional allocation may be performed by different functional modules, that is, the modules or steps in the embodiment of the present invention are further decomposed or combined, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the functions described above. The names of the modules and steps related to the embodiments of the present invention are merely for distinguishing the respective modules or steps, and are not to be construed as unduly limiting the present invention.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus/apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus/apparatus.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the appended claims and their equivalents, the present invention is intended to include such modifications and variations as would be included in the above description of the disclosed embodiments, enabling those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A photovoltaic power generation scheduling system based on station loss analysis, comprising:
the weather information acquisition module is used for acquiring weather data affecting the power generation capacity of the photovoltaic module in the station;
the assembly information acquisition module is connected with each photovoltaic assembly in the station and is used for detecting operation data and actual power generation data of each photovoltaic assembly;
the generating capacity analysis module is connected with the meteorological information acquisition module and the assembly information acquisition module and is used for calculating ideal generating capacity data of each photovoltaic assembly within a preset time limit through the detected meteorological data and operation data, analyzing the difference between the ideal generating capacity data and the actual generating capacity data and generating a generating capacity analysis result;
the dust simulation module is connected with the meteorological information acquisition module and the assembly information acquisition module and is used for simulating the area of dust covering the photovoltaic assemblies according to meteorological data and operation data and calculating actual effective area data of each photovoltaic assembly at each moment;
the abnormal confirmation module is connected with the generated energy analysis module and the dust simulation module and is used for predicting the generated energy of each photovoltaic module according to the actual effective area data, determining the running state of each photovoltaic module by combining the generated energy analysis result and generating a corresponding scheduling instruction;
and the scheduling module is connected with the abnormal confirmation module and is used for receiving the scheduling instruction and sending a corresponding scheduling scheme to the manager according to the scheduling instruction.
2. The photovoltaic power generation scheduling system based on station loss analysis of claim 1, wherein the weather information acquisition module comprises:
an illumination intensity detection unit for detecting illumination intensity data of the day in the station;
a dust concentration detection unit for detecting dust concentration data of the day in the station;
a wind power detection unit for detecting wind direction information and wind speed data of the day in the station;
and a temperature and humidity detection unit for detecting temperature data and humidity data of the day in the station.
3. The photovoltaic power generation scheduling system based on station loss analysis according to claim 2, wherein the component information acquisition module comprises:
the rated power acquisition unit is used for acquiring rated power data of each photovoltaic module in the station;
an ideal area acquisition unit for acquiring ideal effective area data of each photovoltaic module in the station in a non-shielded state;
the actual power generation amount detection unit is arranged at the output end of each photovoltaic module and is used for detecting actual power generation amount data of each photovoltaic module;
and the angle acquisition unit is arranged on each photovoltaic module and used for acquiring the angle data of each photovoltaic module.
4. A photovoltaic power generation scheduling system based on station loss analysis according to claim 3, wherein the power generation amount analysis module comprises:
an ideal power generation amount calculation unit connected with the illumination intensity detection unit, the rated power acquisition unit and the ideal area acquisition unit, and used for substituting the detected rated power data, ideal effective area data and sunlight intensity data of each photovoltaic module into a preset ideal power generation amount calculation model to calculate an ideal power generation amount E0 within a preset time limit;
an actual power generation amount confirmation unit connected to the actual power generation amount detection unit for acquiring the actual power generation amount Et detected by the actual power generation amount detection unit within the preset time period;
a difference calculation unit connected to the ideal power generation amount calculation unit and the actual power generation amount confirmation unit, for calculating a difference value δe between the actual power generation amount Et and the ideal power generation amount E0 within the preset time period;
an abnormality confirmation unit connected to the difference calculation unit; the abnormal confirmation unit is preset with a difference standard range, compares a difference value delta E with the difference standard range and generates a generating capacity analysis result according to a comparison result;
when the difference value delta E exceeds the difference standard range, generating a generated energy analysis result to be abnormal power generation;
and when the difference value delta E does not exceed the difference standard range, generating a generated energy analysis result to be normal power generation.
5. The photovoltaic power generation scheduling system based on station loss analysis according to claim 4, wherein the preset ideal power generation calculation model is e0=p0×s0×g0×t;
wherein T is a preset time limit, G is illumination intensity data, S0 is ideal effective area data, P0 is rated power data, and E0 is ideal power generation amount within the preset time limit T.
6. The photovoltaic power generation scheduling system based on station loss analysis of claim 5, wherein the dust simulation module comprises:
an adhesion acquisition unit connected with the dust concentration detection unit, the wind power detection unit and the temperature and humidity detection unit and used for calculating daily dust adhesion data according to the daily dust concentration data, the wind speed data, the temperature data and the humidity data;
the attaching quantity acquisition unit is connected with the attaching force acquisition unit, the wind power detection unit and the angle acquisition unit and is used for calculating the attaching quantity of dust capable of accumulating on the surface of each photovoltaic module in unit time according to dust attaching force data, wind direction data and angle data of each photovoltaic module;
an actual area calculation unit connected to the adhering amount acquisition unit and the ideal area acquisition unit for calculating actual effective area data St.
7. The photovoltaic power generation scheduling system based on station loss analysis according to claim 6, wherein the calculation process of the actual effective area data includes:
the actual effective area data st=s0- (x×t); s0 is ideal effective area data of the photovoltaic module, X is the attachment quantity of dust accumulated on the surface of the photovoltaic module in unit time, T is a preset time limit, and St is actual effective area data of the surface of the photovoltaic module in the preset time limit T.
8. The photovoltaic power generation scheduling system based on station loss analysis of claim 7, wherein the anomaly confirmation module comprises:
the time acquisition unit is used for acquiring a time difference value from the illumination initial time to the current time;
the data substitution unit is connected with the time acquisition unit, the actual power generation amount confirmation unit and the actual area calculation unit and is used for substituting the time difference value into the preset ideal power generation amount calculation model as a preset time limit T to calculate the ideal power generation amount E0 of each photovoltaic module before the moment; substituting the time difference value as a preset time limit T into the actual area calculation unit to calculate actual effective area data St of each photovoltaic module at the moment;
the first analysis unit is connected with the abnormality confirmation unit and is used for acquiring an electricity generation amount analysis result; generating a judging instruction when the generated energy analysis result is abnormal generation;
the second analysis unit is connected with the first analysis unit, the actual power generation amount confirming unit and the actual area calculating unit and is used for substituting the effective area data St at the moment into the preset ideal power generation amount calculating model when a judging instruction is received, and calculating the predicted ideal power generation amount E1 of each photovoltaic module before the moment; comparing and judging the difference between the predicted ideal power generation amount E1 and the actual power generation amount Et to generate an operation analysis result;
when Et is more than or equal to E1, generating an operation analysis result to be component dust coverage, and inserting actual effective area data St of the photovoltaic component into the result;
when Et is smaller than E1, generating an operation analysis result to be a component equipment fault;
the instruction generation unit is connected with the second analysis unit and is used for receiving the operation analysis result and generating scheduling instructions in a grading manner;
when the operation analysis result received by the instruction generating unit is component dust coverage, generating a primary scheduling instruction;
and when the operation analysis result received by the instruction generating unit is component equipment failure, generating a secondary scheduling instruction.
9. The photovoltaic power generation scheduling system based on station loss analysis of claim 8, wherein the scheduling module comprises:
an instruction receiving unit connected with the instruction generating unit and used for receiving the scheduling instruction and generating corresponding alarm information; when the instruction receiving unit receives a primary scheduling instruction, the actual effective area data St carried by the primary scheduling instruction and the position information of the photovoltaic module are used as alarm information to be sent to terminal equipment of a manager; when the instruction receiving unit receives the secondary scheduling instruction, the position information of the photovoltaic module carried by the secondary scheduling instruction is used as alarm information to be sent to terminal equipment of management personnel;
the terminal equipment is connected with the instruction receiving unit and is carried by a manager; and when the terminal equipment receives the alarm information, classifying each alarm information, wherein the set top does not carry the alarm information of the actual effective area data St.
10. The photovoltaic power generation scheduling system based on station loss analysis of claim 9, wherein the scheduling module further comprises:
when a primary scheduling instruction is received, the power generation of the photovoltaic module is automatically reduced, and the power generation is used as rated power data P0 to be sent to the ideal power generation amount calculation unit to participate in calculating the ideal power generation amount at the next moment.
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| CN117997270B (en) * | 2024-04-03 | 2024-07-12 | 国网山西省电力公司营销服务中心 | Monitoring method and system for photovoltaic power generation metering faults |
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