CN117997270A - Monitoring method and system for photovoltaic power generation metering faults - Google Patents
Monitoring method and system for photovoltaic power generation metering faults Download PDFInfo
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- CN117997270A CN117997270A CN202410402581.5A CN202410402581A CN117997270A CN 117997270 A CN117997270 A CN 117997270A CN 202410402581 A CN202410402581 A CN 202410402581A CN 117997270 A CN117997270 A CN 117997270A
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- 238000010248 power generation Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 238000012795 verification Methods 0.000 claims abstract description 86
- 238000012545 processing Methods 0.000 claims description 28
- 238000005286 illumination Methods 0.000 claims description 19
- 238000004140 cleaning Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 6
- 238000012937 correction Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 description 10
- 239000000428 dust Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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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
- H02J13/00032—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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- 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
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to the technical field of electric energy metering, in particular to a monitoring method and a system for photovoltaic power generation metering faults, which are characterized in that actual power generation electric energy of a photovoltaic power generation station in a period is obtained through acquiring working state data of the photovoltaic power generation station, the actual power generation electric energy of the photovoltaic power generation station in the period and authentication output electric energy of the photovoltaic power generation station are processed to obtain verification electric energy of the photovoltaic power generation station in the period, the verification electric energy of the photovoltaic power generation station in m periods is obtained, the number n of periods with the verification electric energy of the photovoltaic power generation station in the period being greater than the verification electric energy threshold of the photovoltaic power generation station in the period is obtained in m periods, when n/m is more than or equal to 0.3, the operation faults of the photovoltaic power generation station are indicated, so that the determination of the faults of the photovoltaic power generation station is completed, the type of the photovoltaic power generation metering faults can be effectively identified, the photovoltaic power generation metering faults are ensured to be obtained and timely and effectively processed, and the applicability is wide.
Description
Technical Field
The invention relates to the technical field of electric energy metering, in particular to a monitoring method and a system for metering faults of photovoltaic power generation.
Background
Photovoltaic power generation is widely used and researched as a clean energy source. However, in the prior art, a manual detection mode is generally adopted, but the manual mode has many defects, such as poor detection instantaneity, low detection efficiency and low detection accuracy, and if the photovoltaic power generation metering fails, many troubles are caused.
As patent application number 202211127943.1 discloses a method, a device, electronic equipment and a medium for monitoring photovoltaic power generation metering faults, which are used for acquiring the internet surfing type of a target to be monitored, wherein the internet surfing type is full internet surfing or residual electricity internet surfing; determining a target monitoring strategy of hit of the target to be monitored according to the determined internet surfing type, wherein the target monitoring strategy is a first night electric quantity abnormal strategy or a second night electric quantity abnormal strategy and/or an electric quantity unbalance strategy; sampling the ammeter of the object to be monitored to obtain sampling data comprising a plurality of sampling points; and monitoring the metering faults of the target to be monitored according to the sampling data and the determined target monitoring strategy.
In the prior art, although monitoring of the photovoltaic power generation metering faults is completed, the type of the photovoltaic power generation metering faults cannot be effectively identified, so that the photovoltaic power generation metering faults cannot be effectively processed in time, and the method has a large limitation.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.
The aim of the invention can be achieved by the following technical scheme:
A monitoring method of photovoltaic power generation metering faults comprises the following steps:
Step one: in the period, working state data of the photovoltaic power station are obtained, and actual power generation electric energy of the photovoltaic power station in the period is obtained by processing the working state data of the photovoltaic power station;
step two: processing actual power generation electric energy of the photovoltaic power station in the period and authentication output electric energy of the photovoltaic power station to obtain verification electric energy of the photovoltaic power station in the period, and comparing the verification electric energy of the photovoltaic power station in the period with a verification electric energy threshold value of the photovoltaic power station in the period to obtain an operation state signal of the photovoltaic power station;
the photovoltaic power station operation state signals comprise a photovoltaic power station operation normal signal and a photovoltaic power station operation check signal;
Step three: processing the photovoltaic power station verification electric energy in a plurality of periods and the photovoltaic power station verification electric energy threshold value in the period based on the photovoltaic power station operation verification signal to obtain a photovoltaic power station operation fault signal;
Step four: identifying the fault type of the photovoltaic power station based on the operation fault signal of the photovoltaic power station;
The fault types of the photovoltaic power station comprise photovoltaic panel rack installation faults in the photovoltaic power station and faults of electrical components of the photovoltaic power station.
As a further scheme of the invention: in the first step, the actual power generation electric energy of the photovoltaic power station is obtained through the following steps:
Acquiring the total area of photovoltaic panels of a photovoltaic power station in a period, and recording the total area as Gs;
Acquiring the total illumination intensity of a photovoltaic power station in a period, and marking the total illumination intensity as Ge;
Acquiring the total illumination time length of the photovoltaic power station in the period, and marking the total illumination time length as Gt;
By the formula Calculating the actual power GF of the photovoltaic power station in the period, wherein/>Is a preset correction coefficient.
As a further scheme of the invention: the acquisition process of the authentication output electric energy of the photovoltaic power station comprises the following steps:
Obtaining the loss electric energy of each transmission line of a photovoltaic power station and the input electric energy of a load terminal, and obtaining the line output electric energy of the transmission line;
And adding the line output electric energy of all the transmission lines of the photovoltaic power station to obtain the authentication output electric energy of the photovoltaic power station.
As a further scheme of the invention: in the second step:
If the verification electric energy of the photovoltaic power station in the period is less than or equal to the verification electric energy threshold value of the photovoltaic power station in the period, the power loss of the photovoltaic power station in the period is low, the photovoltaic power station operates normally in the period, and a normal operation signal of the photovoltaic power station is obtained;
if the verification electric energy of the photovoltaic power station in the period is larger than the verification electric energy threshold value of the photovoltaic power station in the period, the power loss of the photovoltaic power station in the period is high, the photovoltaic power station operates abnormally in the period, and a photovoltaic power station operation verification signal is obtained.
As a further scheme of the invention: step three, acquiring the verification electric energy of the photovoltaic power station in m periods of the photovoltaic power station, and acquiring the number of periods, in which the verification electric energy of the photovoltaic power station in the period is greater than the verification electric energy threshold value of the photovoltaic power station in the period, in the m periods, and marking the number as n;
and if n/m is more than or equal to 0.3, indicating the operation fault of the photovoltaic power station, and obtaining an operation fault signal of the photovoltaic power station.
As a further scheme of the invention: dividing the total area region of a photovoltaic panel of the photovoltaic power station into a plurality of area subunits, and respectively acquiring the operation state data of the photovoltaic panel of each area subunit;
The photovoltaic panel operating state data comprises photovoltaic panel cleaning data, photovoltaic panel operating temperature data and photovoltaic panel operating erection data.
As a further scheme of the invention: the method comprises the steps of processing cleaning data of a photovoltaic panel to obtain a cleaning influence value, processing operating temperature data of the photovoltaic panel to obtain a temperature influence value, and processing operating erection data of the photovoltaic panel to obtain an erection influence value;
the cleaning influence value of the photovoltaic panel cleaning data is recorded as Gqj;
the temperature influence value of the photovoltaic panel operation temperature data is recorded as Gwd;
setting up influence values of operation and erection data of the photovoltaic panel as Gjs;
I.e. by the formula Calculating to obtain a photovoltaic panel behavior influence value Gi in the area subunit, wherein a1, a2 and a3 are preset proportionality coefficients, and a1, a2 and a3 are all larger than 0;
And summing the photovoltaic panel behavior influence values of the plurality of area subunits to obtain a total photovoltaic panel behavior influence value in the photovoltaic power station.
As a further scheme of the invention: if the total value of the photovoltaic panel behavior influence in the photovoltaic power station is within the preset range of the total value of the photovoltaic panel behavior influence in the photovoltaic power station, the fact that the photovoltaic panel erection in the photovoltaic power station is free of problems is indicated, the failure point of the photovoltaic power station is an electrical component of the photovoltaic power station, and an electrical component failure signal is generated.
As a further scheme of the invention: and if the total value of the photovoltaic panel behavior influence in the photovoltaic power station is not within the preset range of the total value of the photovoltaic panel behavior influence in the photovoltaic power station, indicating that the photovoltaic panel frame in the photovoltaic power station fails, and generating a photovoltaic panel failure signal.
As another embodiment of the present invention: a photovoltaic power generation metering fault monitoring system comprising:
The data processing module is used for acquiring working state data of the photovoltaic power station in a period, processing the working state data of the photovoltaic power station to obtain actual power generation electric energy of the photovoltaic power station in the period, and transmitting the actual power generation electric energy of the photovoltaic power station to the cloud management and control platform;
The state identification module is used for acquiring actual power generation electric energy of the photovoltaic power station, processing the actual power generation electric energy of the photovoltaic power station in the period and the authentication output electric energy of the photovoltaic power station to obtain verification electric energy of the photovoltaic power station in the period, comparing the verification electric energy of the photovoltaic power station in the period with a verification electric energy threshold value of the photovoltaic power station in the period to obtain a photovoltaic power station operation state signal, and transmitting the photovoltaic power station operation state signal to the cloud management and control platform;
the photovoltaic power station operation state signals comprise a photovoltaic power station operation normal signal and a photovoltaic power station operation check signal;
the fault verification module receives the operation state signals of the photovoltaic power station, which are sent by the cloud control platform, and processes the verification electric energy of the photovoltaic power station in a plurality of periods and the verification electric energy threshold value of the photovoltaic power station in the period based on the operation verification signals of the photovoltaic power station to obtain operation fault signals of the photovoltaic power station;
The fault decision module is used for identifying the fault type of the photovoltaic power station based on the operation fault signal of the photovoltaic power station;
The fault types of the photovoltaic power station comprise photovoltaic panel rack installation faults in the photovoltaic power station and faults of electrical components of the photovoltaic power station.
The invention has the beneficial effects that:
(1) According to the invention, the working state data of the photovoltaic power station is acquired to obtain the actual power generation electric energy of the photovoltaic power station in the period, the actual power generation electric energy of the photovoltaic power station in the period is processed with the authentication output electric energy of the photovoltaic power station to obtain the verification electric energy of the photovoltaic power station in the period, the verification electric energy of the photovoltaic power station in the period is compared with the verification electric energy threshold value of the photovoltaic power station in the period to obtain the operation verification signal of the photovoltaic power station, the verification electric energy of the photovoltaic power station in m periods is acquired in m periods, the number n of periods with the verification electric energy of the photovoltaic power station in the period being greater than the verification electric energy threshold value of the photovoltaic power station in the period is acquired, and the operation fault of the photovoltaic power station is represented when n/m is more than or equal to 0.3, so that the determination of the fault of the photovoltaic power station is completed;
(2) According to the invention, the total area of the photovoltaic panel of the photovoltaic power station is divided into a plurality of area subunits, the photovoltaic panel running state data of each area subunit is respectively obtained, namely, the photovoltaic panel running temperature data and the photovoltaic panel running erection data are processed to obtain the photovoltaic panel behavior influence value in the area subunits, so that the total photovoltaic panel behavior influence value in the photovoltaic power station is obtained, the identification of the fault type of the photovoltaic power station is completed by comparing the total photovoltaic panel behavior influence value in the photovoltaic power station with the preset range of the total photovoltaic panel behavior influence value in the photovoltaic power station, the effective identification can be carried out on the photovoltaic power generation metering fault type, the timely and effective processing of the photovoltaic power generation metering fault is ensured, and the applicability is wide.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of a method for monitoring photovoltaic power generation metering faults according to an embodiment of the present invention;
Fig. 2 is a flow diagram of a photovoltaic power generation metering fault monitoring system in accordance with an embodiment 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.
Example 1
Referring to fig. 1, the invention relates to a method for monitoring a photovoltaic power generation metering fault, which comprises the following steps:
Step one: in the period, working state data of the photovoltaic power station are obtained, and actual power generation electric energy of the photovoltaic power station in the period is obtained by processing the working state data of the photovoltaic power station;
step two: processing actual power generation electric energy of the photovoltaic power station in the period and authentication output electric energy of the photovoltaic power station to obtain verification electric energy of the photovoltaic power station in the period, and comparing the verification electric energy of the photovoltaic power station in the period with a verification electric energy threshold value of the photovoltaic power station in the period to obtain an operation state signal of the photovoltaic power station;
the photovoltaic power station operation state signals comprise a photovoltaic power station operation normal signal and a photovoltaic power station operation check signal;
Step three: processing the photovoltaic power station verification electric energy in a plurality of periods and the photovoltaic power station verification electric energy threshold value in the period based on the photovoltaic power station operation verification signal to obtain a photovoltaic power station operation fault signal;
Step four: identifying the fault type of the photovoltaic power station based on the operation fault signal of the photovoltaic power station;
The fault types of the photovoltaic power station comprise photovoltaic panel rack installation faults in the photovoltaic power station and faults of electrical components of the photovoltaic power station.
Step one, acquiring actual power generation electric energy of a photovoltaic power station in a period;
The actual power generation electric energy of the photovoltaic power station is obtained through the following steps:
Acquiring the total area of photovoltaic panels of a photovoltaic power station in a period, and recording the total area as Gs;
Dividing a time period of the photovoltaic power station in a period when the photovoltaic power station is illuminated every day into a plurality of time subunits, and respectively obtaining illumination intensity of each time subunit at the middle moment;
Summing the illumination intensities of all time subunits in the same day to obtain an average value of the illumination intensities in the same day;
Summing the illumination intensity average values of all days in the period to obtain an average value, and obtaining the illumination total intensity of the photovoltaic power station in the period, wherein the illumination total intensity is recorded as Ge;
Acquiring the illumination time length of each day in the period, summing the illumination time lengths of all days in the period to obtain the total illumination time length of the photovoltaic power station in the period, and marking the total illumination time length as Gt;
the illumination time of each day is the difference between the rising time and the falling time of the sun;
I.e. by the formula Calculating the actual power GF of the photovoltaic power station in the period, wherein/>The correction coefficient is preset;
the cycle number of days of the photovoltaic power plant is m, and m is a positive integer greater than 1.
Acquiring an electric energy transmission line of a photovoltaic power station, acquiring the loss electric energy of each transmission line and the input electric energy of a load terminal, and adding the loss electric energy of each transmission line and the input electric energy of the load terminal to obtain the line output electric energy of the transmission line;
Adding the line output electric energy of all the transmission lines of the photovoltaic power station to obtain the authentication output electric energy of the photovoltaic power station;
wherein, through the formula * The loss electric energy Se of the transmission line is represented by R, wherein I is the current magnitude, R is the wire resistance, and t is the transmission time (period);
obtaining input current and input voltage of a load terminal, multiplying the input current and the input voltage of the load terminal during operation, and integrating the time to obtain input electric energy Fe of the load terminal in a period;
performing difference value calculation on actual power generation electric energy of the photovoltaic power station in the period and authentication output electric energy of the photovoltaic power station to obtain verification electric energy of the photovoltaic power station in the period;
Comparing the verification electric energy of the photovoltaic power station in the period with a verification electric energy threshold value of the photovoltaic power station in the period;
If the verification electric energy of the photovoltaic power station in the period is less than or equal to the verification electric energy threshold value of the photovoltaic power station in the period, the power loss of the photovoltaic power station in the period is low, the photovoltaic power station operates normally in the period, and a normal operation signal of the photovoltaic power station is obtained;
if the verification electric energy of the photovoltaic power station in the period is larger than the verification electric energy threshold value of the photovoltaic power station in the period, the power loss of the photovoltaic power station in the period is high, the photovoltaic power station operates abnormally in the period, and a photovoltaic power station operation verification signal is obtained.
Acquiring the photovoltaic power station verification electric energy in m periods of the photovoltaic power station based on the photovoltaic power station operation verification signal, acquiring the number of periods, in which the photovoltaic power station verification electric energy in the period is greater than a photovoltaic power station verification electric energy threshold in the period, in the m periods, and recording as n;
and if n/m is more than or equal to 0.3, indicating the operation fault of the photovoltaic power station, and obtaining an operation fault signal of the photovoltaic power station.
Dividing the total area region of the photovoltaic panel of the photovoltaic power station into a plurality of area subunits based on the operation fault signal of the photovoltaic power station, and respectively acquiring the operation state data of the photovoltaic panel of each area subunit;
The photovoltaic panel operation state data comprise photovoltaic panel cleaning data, photovoltaic panel operation temperature data and photovoltaic panel operation erection data;
The acquisition process of the photovoltaic panel cleaning data comprises the following steps:
Collecting dust on the photovoltaic panel in the area subunit to obtain dust quality, and calculating the ratio of the dust quality to the area value of the area subunit to obtain a dust coverage factor;
Obtaining the invalid areas of the photovoltaic panels in the area subunit, and calculating the ratio of the sum of the invalid areas of all the photovoltaic panels to the area value of the area subunit to obtain an area influence factor;
The photovoltaic panel invalid area comprises an area of a shielded area and an area of a damaged area of the surface of the photovoltaic panel;
And carrying out product operation on the dust covering factor and the area influencing factor to obtain a cleaning influencing value of the photovoltaic panel cleaning data.
The acquisition process of the photovoltaic panel operation temperature data comprises the following steps:
monitoring the operation temperature of the photovoltaic panel in the area subunit through a temperature sensor to obtain an operation temperature value of the photovoltaic panel, and recording the operation temperature value of the photovoltaic panel which is larger than a rated temperature value and exceeds a preset time length as an abnormal temperature value;
Acquiring total time length of occurrence of abnormal temperature values of the photovoltaic panel in the period, and calculating the ratio of the total time length of the abnormal temperature values of the photovoltaic panel to the total time length of the period to obtain an abnormal temperature time ratio;
And then carrying out product operation on the abnormal temperature time ratio and the frequency of occurrence of the abnormal temperature value of the photovoltaic panel in the period to obtain the temperature influence value of the operation temperature data of the photovoltaic panel.
The acquisition process of the operation erection data of the photovoltaic panel comprises the following steps:
obtaining the number of the photovoltaic panels with abnormal positions in the area subunit, and calculating the ratio of the number of the abnormal photovoltaic panels in the area subunit to the total number of the photovoltaic panels in the area subunit to obtain an erection influence value of operation erection data of the photovoltaic panels;
among these, the abnormal-position photovoltaic panels include, but are not limited to, photovoltaic panels that are tilted within the area subunit and photovoltaic panels that are settled.
The cleaning influence value of the photovoltaic panel cleaning data is recorded as Gqj;
the temperature influence value of the photovoltaic panel operation temperature data is recorded as Gwd;
setting up influence values of operation and erection data of the photovoltaic panel as Gjs;
I.e. by the formula Calculating to obtain a photovoltaic panel behavior influence value Gi in the area subunit, wherein a1, a2 and a3 are preset proportionality coefficients, and a1, a2 and a3 are all larger than 0;
summing the photovoltaic panel behavior influence values of the plurality of area subunits to obtain a total photovoltaic panel behavior influence value in the photovoltaic power station;
If the total value of the photovoltaic panel behavior influence in the photovoltaic power station is within the preset range of the total value of the photovoltaic panel behavior influence in the photovoltaic power station, the fact that the photovoltaic panel erection in the photovoltaic power station is free of problems is indicated, the fault point of the photovoltaic power station is an electric component of the photovoltaic power station, and an electric component fault signal is generated;
The photovoltaic power station electrical components include, but are not limited to, control cabinets, inverters, storage batteries, grid-connected boxes and the like;
if the total value of the photovoltaic panel behavior influence in the photovoltaic power station is not within the preset range of the total value of the photovoltaic panel behavior influence in the photovoltaic power station, the photovoltaic panel frame fault in the photovoltaic power station is indicated, and a photovoltaic panel fault signal is generated;
the manager completes fault processing on different types of maintenance managers based on the electrical component fault signals or the photovoltaic panel fault signals.
Example 2
Referring to fig. 2, the invention relates to a monitoring system for photovoltaic power generation metering faults, which comprises a data processing module, a state identification module, a fault verification module, a fault decision module and a cloud management and control platform;
The data processing module is used for acquiring working state data of the photovoltaic power station in a period, processing the working state data of the photovoltaic power station to obtain actual power generation electric energy of the photovoltaic power station in the period, and sending the actual power generation electric energy of the photovoltaic power station to the cloud management and control platform;
the state identification module acquires actual power generation electric energy of the photovoltaic power station, processes the actual power generation electric energy of the photovoltaic power station in the period and the authentication output electric energy of the photovoltaic power station to obtain verification electric energy of the photovoltaic power station in the period, compares the verification electric energy of the photovoltaic power station in the period with a verification electric energy threshold value of the photovoltaic power station in the period to obtain a photovoltaic power station operation state signal, and sends the photovoltaic power station operation state signal to the cloud management and control platform;
the photovoltaic power station operation state signals comprise a photovoltaic power station operation normal signal and a photovoltaic power station operation check signal;
The fault verification module receives a photovoltaic power station operation state signal sent by the cloud control platform, and processes photovoltaic power station verification electric energy in a plurality of periods and a photovoltaic power station verification electric energy threshold value in the period based on the photovoltaic power station operation verification signal to obtain a photovoltaic power station operation fault signal;
the fault decision module is used for identifying the fault type of the photovoltaic power station based on the operation fault signal of the photovoltaic power station;
The fault types of the photovoltaic power station comprise photovoltaic panel rack installation faults in the photovoltaic power station and faults of electrical components of the photovoltaic power station.
One of the core points of the present invention is: the method comprises the steps of obtaining actual power generation electric energy of a photovoltaic power station in a period through obtaining working state data of the photovoltaic power station, processing the actual power generation electric energy of the photovoltaic power station in the period and authentication output electric energy of the photovoltaic power station to obtain verification electric energy of the photovoltaic power station in the period, comparing the verification electric energy of the photovoltaic power station in the period with a verification electric energy threshold of the photovoltaic power station in the period to obtain operation verification signals of the photovoltaic power station, obtaining the verification electric energy of the photovoltaic power station in m periods of the photovoltaic power station, obtaining the number n of periods when the verification electric energy of the photovoltaic power station in the period is greater than the verification electric energy threshold of the photovoltaic power station in the period in m periods, and indicating operation faults of the photovoltaic power station when n/m is more than or equal to 0.3, thereby completing the determination of the faults of the photovoltaic power station;
One of the core points of the present invention is: dividing the total area region of the photovoltaic panel of the photovoltaic power station into a plurality of area subunits, respectively acquiring the photovoltaic panel operation state data of each area subunit, namely, processing the photovoltaic panel cleaning data, the photovoltaic panel operation temperature data and the photovoltaic panel operation erection data to obtain the photovoltaic panel behavior influence value in the area subunits, further obtaining the photovoltaic panel behavior influence total value in the photovoltaic power station, and comparing the photovoltaic panel behavior influence total value in the photovoltaic power station with the preset range of the photovoltaic panel behavior influence total value in the photovoltaic power station to finish the identification of the fault type of the photovoltaic power station.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (10)
1. The monitoring method for the photovoltaic power generation metering faults is characterized by comprising the following steps of:
Step one: in the period, working state data of the photovoltaic power station are obtained, and actual power generation electric energy of the photovoltaic power station in the period is obtained by processing the working state data of the photovoltaic power station;
step two: processing actual power generation electric energy of the photovoltaic power station in the period and authentication output electric energy of the photovoltaic power station to obtain verification electric energy of the photovoltaic power station in the period, and comparing the verification electric energy of the photovoltaic power station in the period with a verification electric energy threshold value of the photovoltaic power station in the period to obtain an operation state signal of the photovoltaic power station;
the photovoltaic power station operation state signals comprise a photovoltaic power station operation normal signal and a photovoltaic power station operation check signal;
Step three: processing the photovoltaic power station verification electric energy in a plurality of periods and the photovoltaic power station verification electric energy threshold value in the period based on the photovoltaic power station operation verification signal to obtain a photovoltaic power station operation fault signal;
Step four: identifying the fault type of the photovoltaic power station based on the operation fault signal of the photovoltaic power station;
The fault types of the photovoltaic power station comprise photovoltaic panel rack installation faults in the photovoltaic power station and faults of electrical components of the photovoltaic power station.
2. The method for monitoring a metering fault of photovoltaic power generation according to claim 1, wherein in the first step, the actual power generation of the photovoltaic power station is obtained by:
Acquiring the total area of photovoltaic panels of a photovoltaic power station in a period, and recording the total area as Gs;
Acquiring the total illumination intensity of a photovoltaic power station in a period, and marking the total illumination intensity as Ge;
Acquiring the total illumination time length of the photovoltaic power station in the period, and marking the total illumination time length as Gt;
By the formula Calculating the actual power GF of the photovoltaic power station in the period, whereinIs a preset correction coefficient.
3. The method for monitoring a metering fault of photovoltaic power generation according to claim 1, wherein the process of obtaining the authentication output electric energy of the photovoltaic power station is as follows:
Obtaining the loss electric energy of each transmission line of a photovoltaic power station and the input electric energy of a load terminal, and obtaining the line output electric energy of the transmission line;
And adding the line output electric energy of all the transmission lines of the photovoltaic power station to obtain the authentication output electric energy of the photovoltaic power station.
4. The method for monitoring a photovoltaic power generation metering fault according to claim 1, wherein in the second step:
If the verification electric energy of the photovoltaic power station in the period is less than or equal to the verification electric energy threshold value of the photovoltaic power station in the period, the power loss of the photovoltaic power station in the period is low, the photovoltaic power station operates normally in the period, and a normal operation signal of the photovoltaic power station is obtained;
if the verification electric energy of the photovoltaic power station in the period is larger than the verification electric energy threshold value of the photovoltaic power station in the period, the power loss of the photovoltaic power station in the period is high, the photovoltaic power station operates abnormally in the period, and a photovoltaic power station operation verification signal is obtained.
5. The method for monitoring the metering faults of the photovoltaic power generation according to claim 1, wherein in the third step, the verification electric energy of the photovoltaic power generation station in m periods of the photovoltaic power generation station is obtained, and the number of periods, in which the verification electric energy of the photovoltaic power generation station in the period is greater than the verification electric energy threshold value of the photovoltaic power generation station in the period, is obtained in the m periods and is recorded as n;
and if n/m is more than or equal to 0.3, indicating the operation fault of the photovoltaic power station, and obtaining an operation fault signal of the photovoltaic power station.
6. The method for monitoring the photovoltaic power generation metering faults according to claim 1, wherein the total area region of a photovoltaic panel of a photovoltaic power station is divided into a plurality of area subunits, and the operation state data of the photovoltaic panel of each area subunit is respectively acquired;
The photovoltaic panel operating state data comprises photovoltaic panel cleaning data, photovoltaic panel operating temperature data and photovoltaic panel operating erection data.
7. The method for monitoring a photovoltaic power generation metering fault according to claim 6, wherein the cleaning influence value is obtained by processing the cleaning data of the photovoltaic panel, the temperature influence value is obtained by processing the operation temperature data of the photovoltaic panel, and the erection influence value is obtained by processing the operation erection data of the photovoltaic panel;
the cleaning influence value of the photovoltaic panel cleaning data is recorded as Gqj;
the temperature influence value of the photovoltaic panel operation temperature data is recorded as Gwd;
setting up influence values of operation and erection data of the photovoltaic panel as Gjs;
I.e. by the formula Calculating to obtain a photovoltaic panel behavior influence value Gi in the area subunit, wherein a1, a2 and a3 are preset proportionality coefficients, and a1, a2 and a3 are all larger than 0;
And summing the photovoltaic panel behavior influence values of the plurality of area subunits to obtain a total photovoltaic panel behavior influence value in the photovoltaic power station.
8. The method for monitoring the metering faults of the photovoltaic power generation according to claim 7, wherein if the total value of the photovoltaic panel behavior influence in the photovoltaic power generation station is within a preset range of the total value of the photovoltaic panel behavior influence in the photovoltaic power generation station, the condition that the erection of the photovoltaic panel in the photovoltaic power generation station is free of problems is indicated, the fault point of the photovoltaic power generation station is an electrical component of the photovoltaic power generation station, and an electrical component fault signal is generated.
9. The method for monitoring a photovoltaic power generation metering fault according to claim 7, wherein if the total value of the photovoltaic panel behavior influence in the photovoltaic power generation station is not within a preset range of the total value of the photovoltaic panel behavior influence in the photovoltaic power generation station, the method indicates that the photovoltaic panel in the photovoltaic power generation station is in a fault, and a photovoltaic panel fault signal is generated.
10. A photovoltaic power generation metering fault monitoring system, comprising:
The data processing module is used for acquiring working state data of the photovoltaic power station in a period, processing the working state data of the photovoltaic power station to obtain actual power generation electric energy of the photovoltaic power station in the period, and transmitting the actual power generation electric energy of the photovoltaic power station to the cloud management and control platform;
The state identification module is used for acquiring actual power generation electric energy of the photovoltaic power station, processing the actual power generation electric energy of the photovoltaic power station in the period and the authentication output electric energy of the photovoltaic power station to obtain verification electric energy of the photovoltaic power station in the period, comparing the verification electric energy of the photovoltaic power station in the period with a verification electric energy threshold value of the photovoltaic power station in the period to obtain a photovoltaic power station operation state signal, and transmitting the photovoltaic power station operation state signal to the cloud management and control platform;
the photovoltaic power station operation state signals comprise a photovoltaic power station operation normal signal and a photovoltaic power station operation check signal;
the fault verification module receives the operation state signals of the photovoltaic power station, which are sent by the cloud control platform, and processes the verification electric energy of the photovoltaic power station in a plurality of periods and the verification electric energy threshold value of the photovoltaic power station in the period based on the operation verification signals of the photovoltaic power station to obtain operation fault signals of the photovoltaic power station;
The fault decision module is used for identifying the fault type of the photovoltaic power station based on the operation fault signal of the photovoltaic power station;
The fault types of the photovoltaic power station comprise photovoltaic panel rack installation faults in the photovoltaic power station and faults of electrical components of the photovoltaic power station.
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