CN116781009A - Photovoltaic power generation output electric energy abnormality detection method based on actual environment - Google Patents
Photovoltaic power generation output electric energy abnormality detection method based on actual environment Download PDFInfo
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- CN116781009A CN116781009A CN202310612070.1A CN202310612070A CN116781009A CN 116781009 A CN116781009 A CN 116781009A CN 202310612070 A CN202310612070 A CN 202310612070A CN 116781009 A CN116781009 A CN 116781009A
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- photovoltaic power
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- 238000010248 power generation Methods 0.000 title claims abstract description 79
- 230000005856 abnormality Effects 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 title claims abstract description 13
- 230000005284 excitation Effects 0.000 claims abstract description 13
- 230000002159 abnormal effect Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a photovoltaic power generation output electric energy abnormality detection method based on an actual environment, which comprises the following steps: step (1): collecting the information of the actual environment of the photovoltaic power generation, an output current signal and an output voltage signal; step (2): calculating excitation current in the photovoltaic power generation; step (3): calculating the open-circuit voltage of the photovoltaic power generation photovoltaic module; step (4): calculating the maximum power point current output by the photovoltaic power generation photovoltaic module; step (5): calculating the maximum power point voltage output by the photovoltaic power generation photovoltaic module; step (6): and calculating the output current of the photovoltaic power generation photovoltaic module. Step (7): and judging whether the photovoltaic power generation output electric energy is abnormal or not. The invention provides a photovoltaic power generation output electric energy abnormality detection method based on an actual environment, which can accurately calculate photovoltaic power generation output calculation according to actual environment information and better judge whether abnormality exists by combining an actual sampling value.
Description
Technical Field
The invention belongs to the technical field of photovoltaic power generation, and particularly relates to a photovoltaic power generation output electric energy abnormality detection method based on an actual environment.
Background
In order to protect the conventional energy and environment, people start to use new energy for power generation in large quantities, and thus, photovoltaic power generation is incorporated into the power grid on a large scale or added to people's daily production and life. The photovoltaic power generation has random fluctuation and is extremely easy to be influenced by external environmental factors, and in order to reduce the influence of the addition of the photovoltaic power generation on the safety of the power grid, accurate photovoltaic power generation output electric energy needs to be calculated so as to better control the electric energy access to the power grid.
The invention provides a photovoltaic power generation output electric energy abnormality detection method based on an actual environment.
Disclosure of Invention
The invention provides a photovoltaic power generation output electric energy abnormality detection method based on an actual environment, which can accurately calculate photovoltaic power generation output calculation according to actual environment information and better judge whether abnormality exists by combining an actual sampling value.
The invention particularly relates to a photovoltaic power generation output electric energy abnormality detection method based on an actual environment, which comprises the following steps:
step (1): collecting the information of the actual environment of the photovoltaic power generation, an output current signal and an output voltage signal;
step (2): calculating excitation current in the photovoltaic power generation;
step (3): calculating the open-circuit voltage of the photovoltaic power generation photovoltaic module;
step (4): calculating the maximum power point current output by the photovoltaic power generation photovoltaic module;
step (5): calculating the maximum power point voltage output by the photovoltaic power generation photovoltaic module;
step (6): and calculating an output current calculation value of the photovoltaic power generation photovoltaic module.
Step (7): and judging whether the photovoltaic power generation output electric energy is abnormal or not.
The actual environment information of the photovoltaic power generation is mainly as follows: solar intensity S and photovoltaic panel temperature T.
The specific algorithm for calculating the excitation current in the photovoltaic power generation is as follows:
wherein S is ref For the sunlight intensity reference value, a=0.0025 is a constant, T ref Is the temperature reference value of the photovoltaic cell panel, i scref The excitation current is the excitation current under standard test conditions.
The specific algorithm for calculating the open circuit voltage of the photovoltaic power generation photovoltaic module is as follows:
wherein v is ocref For the open circuit voltage under standard test conditions, b=0.5 is a constant and c= 0.00288 is a constant.
The specific algorithm for calculating the maximum power point current output by the photovoltaic power generation photovoltaic module is as follows:
wherein i is mref The maximum power point current is output under standard test conditions.
The specific algorithm for calculating the voltage of the maximum power point output by the photovoltaic power generation photovoltaic module is as follows:
wherein v is mre f Is the output maximum power point voltage under standard test conditions.
The specific algorithm for calculating the output current calculated value of the photovoltaic power generation photovoltaic module is as follows:
wherein the method comprises the steps ofv is the output voltage of the photovoltaic power generation photovoltaic module.
The specific method for judging whether the photovoltaic power generation output electric energy is abnormal or not comprises the following steps:
calculating the difference value between the acquired output current signal and the output current calculated value;
and judging whether the difference value is larger than a difference value reference value, if so, checking and maintaining are needed for the abnormality of the photovoltaic power generation output electric energy.
Compared with the prior art, the beneficial effects are that: according to the photovoltaic power generation output electric energy abnormality detection method, the actual excitation current, the open-circuit voltage, the output maximum power point current and the output maximum power point voltage of the photovoltaic power generation photovoltaic module are calculated according to the actual environment information, then the output current calculated values under different environment information are calculated, and then whether the photovoltaic power generation output electric energy is abnormal or not is judged according to the difference value between the output current calculated values and the sampling values, so that the abnormality is found in time, and the photovoltaic power generation electric energy output is ensured.
Drawings
Fig. 1 is a workflow diagram of a photovoltaic power generation output electric energy abnormality detection method based on an actual environment.
Detailed Description
The following describes a specific embodiment of the photovoltaic power generation output electric energy abnormality detection method based on the actual environment in detail with reference to the accompanying drawings.
As shown in fig. 1, the photovoltaic power generation output electric energy abnormality detection method of the present invention includes the steps of:
step (1): collecting the information of the actual environment of the photovoltaic power generation, an output current signal and an output voltage signal; the actual environment information comprises sunlight intensity S and photovoltaic cell panel temperature T;
step (2): meter with a meter bodyCalculating excitation current in the photovoltaic power generation:wherein S is ref For the sunlight intensity reference value, a=0.0025 is a constant, T ref Is the temperature reference value of the photovoltaic cell panel, i scref The excitation current is the excitation current under standard test conditions;
step (3): calculating the open-circuit voltage of the photovoltaic power generation photovoltaic module:
wherein v is ocre f For the open circuit voltage under standard test conditions, b=0.5 is a constant and c= 0.00288 is a constant;
step (4): calculating the maximum power point current output by the photovoltaic power generation photovoltaic module:
wherein i is mref The output maximum power point current is the output maximum power point current under the standard test condition;
step (5): calculating the maximum power point voltage output by the photovoltaic power generation photovoltaic module:
wherein v is mre f The output maximum power point voltage is the output maximum power point voltage under the standard test condition;
step (6): calculating the output current of the photovoltaic power generation photovoltaic module:
wherein the method comprises the steps ofv is the output voltage of the photovoltaic power generation photovoltaic module.
Step (7): judging whether the photovoltaic power generation output electric energy is abnormal or not:
calculating the difference value between the acquired output current signal and the output current calculated value;
and judging whether the difference value is larger than a difference value reference value, if so, checking and maintaining are needed for the abnormality of the photovoltaic power generation output electric energy.
Finally, it should be noted that the above-mentioned embodiments are merely illustrative of the technical solution of the invention and not limiting thereof. It will be understood by those skilled in the art that modifications and equivalents may be made to the particular embodiments of the invention, which are within the scope of the claims appended hereto.
Claims (8)
1. The photovoltaic power generation output electric energy abnormality detection method based on the actual environment is characterized by comprising the following steps of:
step (1): collecting the information of the actual environment of the photovoltaic power generation, an output current signal and an output voltage signal;
step (2): calculating excitation current in the photovoltaic power generation;
step (3): calculating the open-circuit voltage of the photovoltaic power generation photovoltaic module;
step (4): calculating the maximum power point current output by the photovoltaic power generation photovoltaic module;
step (5): calculating the maximum power point voltage output by the photovoltaic power generation photovoltaic module;
step (6): and calculating the output current of the photovoltaic power generation photovoltaic module.
Step (7): and judging whether the photovoltaic power generation output electric energy is abnormal or not.
2. The method for detecting abnormal photovoltaic power generation output electric energy based on actual environment according to claim 1, wherein the information of the actual photovoltaic power generation environment is mainly: solar intensity S and photovoltaic panel temperature T.
3. The method for detecting abnormal output electric energy of photovoltaic power generation based on actual environment according to claim 2, wherein the specific algorithm for calculating the excitation current in the photovoltaic power generation is as follows:
wherein S is ref For the sunlight intensity reference value, a=0.0025 is a constant, T ref Is the temperature reference value of the photovoltaic cell panel, i scref The excitation current is the excitation current under standard test conditions.
4. The method for detecting abnormal photovoltaic power generation output electric energy based on actual environment according to claim 3, wherein the specific algorithm for calculating the open circuit voltage of the photovoltaic power generation photovoltaic module is as follows:
wherein v is ocre f For the open circuit voltage under standard test conditions, b=0.5 is a constant and c= 0.00288 is a constant.
5. The method for detecting abnormal photovoltaic power generation output electric energy based on actual environment according to claim 4, wherein the specific algorithm for calculating the maximum power point current output by the photovoltaic power generation photovoltaic module is as follows:
wherein i is mref The maximum power point current is output under standard test conditions.
6. The method for detecting abnormal photovoltaic power generation output electric energy based on actual environment according to claim 5, wherein the specific algorithm for calculating the voltage of the maximum power point output by the photovoltaic power generation photovoltaic module is as follows:
wherein v is mre f Is the output maximum power point voltage under standard test conditions.
7. The method for detecting abnormal photovoltaic power generation output electric energy based on actual environment according to claim 6, wherein the specific algorithm for calculating the output current of the photovoltaic power generation photovoltaic module is as follows:
wherein the method comprises the steps ofv is the output voltage of the photovoltaic power generation photovoltaic module.
8. The method for detecting the abnormality of the photovoltaic power generation output electric energy based on the actual environment according to claim 7, wherein the specific method for judging whether the abnormality exists in the photovoltaic power generation output electric energy is as follows:
calculating the difference value between the acquired output current signal and the output current calculated value;
and judging whether the difference value is larger than a difference value reference value, if so, checking and maintaining are needed for the abnormality of the photovoltaic power generation output electric energy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310612070.1A CN116781009A (en) | 2023-05-29 | 2023-05-29 | Photovoltaic power generation output electric energy abnormality detection method based on actual environment |
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| CN202310612070.1A CN116781009A (en) | 2023-05-29 | 2023-05-29 | Photovoltaic power generation output electric energy abnormality detection method based on actual environment |
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