CN211321298U - Photovoltaic module generated energy loss detecting system - Google Patents
Photovoltaic module generated energy loss detecting system Download PDFInfo
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- CN211321298U CN211321298U CN201921875053.2U CN201921875053U CN211321298U CN 211321298 U CN211321298 U CN 211321298U CN 201921875053 U CN201921875053 U CN 201921875053U CN 211321298 U CN211321298 U CN 211321298U
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Abstract
The utility model discloses a photovoltaic module generated energy loss detection system, which comprises an upper computer, a controller, a standard photovoltaic module and a comparison photovoltaic module; the standard photovoltaic module and the comparison photovoltaic module are respectively provided with an inverter, the inverters are used for measuring current, voltage and power of the standard photovoltaic module and the comparison photovoltaic module, the standard photovoltaic module is provided with a cleaning device, the controller is used for controlling the cleaning device to clean the standard photovoltaic module, the output end of the inverter is connected with the input end of the controller, the input end of the cleaning device is connected with the output end of the controller, and the controller is in two-way connection with an upper computer. The method can detect the data of the photovoltaic module with continuous dust deposition and the data required by the actual highest power generation capacity.
Description
Technical Field
The utility model belongs to the technical field of photovoltaic power generation, concretely relates to photovoltaic module generated energy loss detecting system.
Background
Photovoltaic power generation technology has developed rapidly in recent years. Photovoltaic power generation is primarily the conversion of solar radiation into electrical energy. However, due to factors such as air pollution, dust adheres to the surface of the photovoltaic module, and the photovoltaic power generation amount is greatly influenced.
According to experience, dust affects the power generation of the photovoltaic module by about 2% to 10%. Particularly in a high-dust area, the proportion of dust factors influencing the generated energy is particularly remarkable. Also, as the dust accumulates, hot spots can form and cause a "hot spot effect" of the photovoltaic module, resulting in damage to the module and, in severe cases, even a fire.
In addition, as photovoltaic power stations develop towards intellectualization, refinement and digitization, core indexes representing operation indexes and power generation capacity of the photovoltaic power stations need to be quantitatively analyzed. In China, due to the fact that operation and maintenance of environment monitor equipment are unreliable, data acquisition precision is low, and the like, power shortage exists, and the theoretical generated energy index planned by irradiation data is inaccurate.
In the existing dust loss detection equipment, only the voltage and the current of a common photovoltaic module are detected, the real-time power generation loss is calculated, but the highest power generation amount is not calculated as data, so that the calculation precision is not enough, a device capable of detecting the data of the photovoltaic module with continuous dust deposition and the data required by the actual highest power generation amount is required, the two sets of data can be combined, and the accurate loss value of the power generation amount is obtained by using the existing formula to judge the dust deposition degree of the photovoltaic module.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a photovoltaic module generated energy loss detecting system. The method can detect the data of the photovoltaic module with continuous dust deposition and the data required by the actual highest power generation capacity.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a photovoltaic module generating capacity loss detection system comprises an upper computer, a controller, a standard photovoltaic module and a comparison photovoltaic module;
the standard photovoltaic module and the comparison photovoltaic module are respectively provided with an inverter, the inverters are used for measuring current, voltage and power of the standard photovoltaic module and the comparison photovoltaic module, the standard photovoltaic module is provided with a cleaning device, the controller is used for controlling the cleaning device to clean the standard photovoltaic module, the output end of the inverter is connected with the input end of the controller, the input end of the cleaning device is connected with the output end of the controller, and the controller is in two-way connection with an upper computer.
Preferably, the controller is further connected with a solar radiation detection device, backboard temperature detection devices are arranged on the standard photovoltaic module and the comparison photovoltaic module, and the output end of the solar radiation detection device and the output end of the backboard temperature detection device are connected with the input end of the controller.
Further, the solar radiation detection device adopts a solar radiation comprehensive observation station.
Preferably, the number of the standard photovoltaic modules and the number of the comparison photovoltaic modules are two respectively, the two standard photovoltaic modules and the two comparison photovoltaic modules work simultaneously, the two standard photovoltaic modules form a group, and the two comparison photovoltaic modules form a group.
Further, two standard photovoltaic modules are respectively provided with two different types of cleaning devices.
Furthermore, one set of cleaning device consists of a cleaning brush, an electric telescopic rod and a component fixing clamp, the component fixing clamp is fixed on the standard photovoltaic component, the electric telescopic rod is fixed on the component fixing clamp, the electric telescopic rod is positioned above the standard photovoltaic component, the electric telescopic rod is parallel to the long edge of the standard photovoltaic component, and the input end of the electric telescopic rod is connected with the output end of the controller; the cleaning brush is fixed at the output end of the electric telescopic rod, the cleaning brush is in contact with the surface of the standard photovoltaic module, the cleaning brush is parallel to the short edge of the standard photovoltaic module, and the length of the cleaning brush is not less than the length of the short edge of the standard photovoltaic module;
the other set of cleaning device consists of a cleaning brush, rollers and rails, wherein the cleaning brush is rod-shaped, bristles are arranged on the peripheral surface of the cleaning brush, the two rollers are positioned at the two ends of the cleaning brush, the two sides of the photovoltaic module are respectively provided with the rails, and the rollers are arranged on the rails;
the two sets of cleaning devices are connected with cleaning liquid devices, each cleaning liquid device comprises a pipeline, a pump and a container in which cleaning liquid is stored, the containers are connected with the cleaning brushes through the pipelines, and the pumps are connected with the pipelines.
Preferably, the upper computer adopts a photovoltaic power station SCADA system.
Preferably, the controller is connected with a power supply device for supplying power to the controller.
Further, the power supply device adopts a 12V storage battery.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a be provided with clean subassembly, remain clear standard photovoltaic module throughout, and do not carry out clear control photovoltaic module, through using current, voltage and the power that inverter measurement standard photovoltaic module and control photovoltaic module, through standard photovoltaic module's detection, obtain the required data of actual highest generated energy, through control photovoltaic module's detection, obtain the photovoltaic module data of lasting deposition, for the loss value of calculating the generated energy, provide the data basis.
Further, by arranging the solar radiation comprehensive observation station, the inclined plane irradiation value Gj can be obtained, and the real-time temperature of the photovoltaic module is detected by using the backboard temperature detection device, so that data required for calculating the theoretical generating capacity of the power station is detected.
Furthermore, the number of the standard photovoltaic modules and the number of the comparison photovoltaic modules are two respectively, the two standard photovoltaic modules form a group, the two comparison photovoltaic modules form a group, when one of the standard photovoltaic modules and the one of the comparison photovoltaic modules in the same group are in fault, the other one of the standard photovoltaic modules and the comparison photovoltaic modules is in normal detection, and the influence of equipment faults on calculation accuracy is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein: 1-a solar radiation comprehensive observation station; 2-a backplane temperature detection device; 3, cleaning a brush; 4, an electric telescopic rod; 5-component fixing clamp; 6-a cleaning solution device; 7-roller type connecting rod; 8-an inverter; 9-a controller; 10-a power supply device; 11-standard photovoltaic modules; 12-control photovoltaic module; 13-an upper computer; 14-cloud platform.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a photovoltaic module generated energy loss detecting system, as shown in FIG. 1, including host computer 13, controller 9, solar radiation detection device, measurement system, belt cleaning device, power supply unit 10, alarm device and data archives.
The controller 9 is used as an intermediate device and is respectively connected with the upper computer 13, the solar radiation detection device, the measuring system, the cleaning device and the power supply device 10; the upper computer 13 is an upper-level system of the controller 9, and the upper computer 13 adopts a photovoltaic power station SCADA system in the embodiment; the output end of the solar radiation detection device and the output end of the measurement system transmit data to the upper computer 13 through the controller 9. The input end of the cleaning device is connected with the output end of the controller, the output end of the power supply device 10 is connected with the input end of the controller 9 and the input end of the solar radiation detection device, the controller 9 adopts a single chip microcomputer or a PLC controller, SmartLogiger 2000 is preferably adopted in the embodiment, and the controller 9 is transmitted to the upper computer 13 through a wireless or wired communication device; the controller 9 is used for sending the received data of the solar radiation detection device and the measurement system to the upper computer 13, and sending the received data of the upper computer 13 to other components.
The measuring system comprises a plurality of photovoltaic assemblies, a micro inverter and a backboard temperature detecting system; each photovoltaic module is provided with an independent micro inverter; the inverter 8 is used for measuring the current, voltage and power of a standard photovoltaic module 11 and a comparison photovoltaic module 12, wherein the photovoltaic modules comprise the standard photovoltaic module 11 and the comparison photovoltaic module 12; and a cleaning device is arranged on the standard photovoltaic module 11 and used for cleaning the standard photovoltaic module 11 to enable the standard photovoltaic module 11 to be always kept in a non-dust-deposition state, and the micro inverter, the cleaning device and the backboard temperature detection device 2 in each module are connected with the controller 9 through signals.
The number of the standard photovoltaic modules 11 and the number of the comparison photovoltaic modules 12 are two respectively, and two types of cleaning devices are arranged on the two standard photovoltaic modules 11 respectively. Two standard photovoltaic modules 11 and two contrast photovoltaic modules 12 work simultaneously, the two standard photovoltaic modules are in one group, the two contrast photovoltaic modules are in one group, when one of the two standard photovoltaic modules in the same group breaks down, the other standard photovoltaic module in the same group normally detects the other standard photovoltaic module, and the influence of equipment failure on calculation accuracy is reduced.
The number of the cleaning devices is two, and the cleaning devices are all connected with the cleaning liquid device 6.
One set of cleaning device consists of a cleaning brush 3, an electric telescopic rod 4 and a component fixing clamp 5, the component fixing clamp 5 is fixed on a standard photovoltaic component 11, the electric telescopic rod 4 is fixed on the component fixing clamp 5, the electric telescopic rod 4 is positioned above the standard photovoltaic component 11, and the electric telescopic rod 4 is parallel to the long edge of the standard photovoltaic component 11; cleaning brush 3 is fixed at the output of electric telescopic handle 4, cleaning brush 3 and 11 surface contact of standard photovoltaic module, and cleaning brush 3 is parallel with the minor face of standard photovoltaic module 11, and length is not less than the minor face length of standard photovoltaic module 11.
Another set of belt cleaning device comprises cleaning brush 3, gyro wheel and track, and cleaning brush 3 is shaft-like, is provided with the brush hair on global, and two gyro wheels are located cleaning brush 3 both ends, and photovoltaic module both sides are provided with a track respectively, and the gyro wheel sets up on the track, connects the motor through controller 9, and the motor is connected the gyro wheel, and the gyro wheel rolls, drives cleaning brush 3 and rolls back and forth on photovoltaic module to reach the abluent effect of photovoltaic module.
The cleaning liquid device 6 comprises a hose, a pump and a container with cleaning liquid stored in the hose, the hose is connected with the cleaning brush 3, the pump is arranged at the output end of the cleaning liquid device 6, the controller 9 is connected with the electric telescopic rod 4, and the cleaning liquid device can control the expansion of the electric telescopic rod 4 and the rotation of the motor and cooperate with the cleaning liquid provided by the cleaning liquid device 6 to achieve the cleaning effect.
Solar radiation detection device adopts solar radiation comprehensive observation station 1, including anemoscope, all radiation appearance and heat dissipation appearance, temperature and humidity sensor, wind vane etc, the utility model discloses well solar radiation comprehensive observation station 1 chooses for use the model to be NHFSZ29 or other devices that have the same kind of function, can acquire real-time ambient temperature t through solar radiation comprehensive observation station 1, humidity p% to and total irradiation, straight irradiation, inclined plane irradiation and the scattered irradiation of level, total irradiation, straight irradiation and the scattered irradiation of level mainly used irradiation prediction, as the prediction of power station generated energy, report electric wire netting company.
The power supply device 10 is used for providing a power supply for the whole photovoltaic module generating capacity loss detection system, and the power supply device 10 can be powered by a storage battery or a management station area; since the detection device is a small system in this embodiment, the power consumption is small, and therefore, a 12V battery is preferably used as the power supply device 10.
And adding cleaning devices on the assemblies A and D, wherein the generated energy obtained by using the assemblies A and D as standard photovoltaic assemblies 11 is Gr (i), the generated energy obtained by using the assemblies B and C as reference photovoltaic assemblies 12 is gf (i), and the Gr (i) and gf (i) with error data removed are analyzed and compared in the background in the SCADA system.
The data of the two comparison photovoltaic assemblies 12 are averaged before being calculated, the data measured by the standard photovoltaic assembly 11 with the highest cleanliness, namely the current value is the highest, is adopted before the data of the two standard photovoltaic assemblies 11 are calculated, the controller 9 sends the average value of the data measured by the inverter 8 on the two comparison photovoltaic assemblies 12 to the upper computer 13, and simultaneously sends the data measured by the standard photovoltaic assembly 11 with the highest current value in the two standard photovoltaic assemblies 11 to the upper computer 13.
The specific periodic ash deposition rate calculation formula is as follows:
the SCADA background acquires real-time power generation amount data of the standard photovoltaic module 11 and the comparison photovoltaic module 12, and the irradiance is more than 100W/m2Under the condition, the real-time ash deposition rate value is obtained by adopting the following existing formula:
wherein: SLF: the time t is taken as the dust deposition rate of the sampling period; gr (i): the power generation amount data of the time t is uploaded by the reference assembly after being cleaned every day; and gf (i) the other group of t-minute electric quantity data uploaded by the photovoltaic module for monitoring.
Above only the irradiation amount is more than 100W/m2The measured soot deposition rate is valid.
Through the calculation of a photovoltaic power station SCADA system, if the generated energy benefit loss calculated by the ash deposition rate is greater than the preset single cleaning cost, a cleaning alarm is sent out and is transmitted to an operation and maintenance engineer. And taking the time period as the cleaning period of the photovoltaic module, recording the cleaning period in a data file, and recording and archiving the dust loss condition measured periodically, so that a large data analysis library and a long-term system observation database are conveniently established.
Moreover, the SCADA data can be uploaded to the cloud platform 14, such as an e-cloud intelligent monitoring platform, so that data monitoring and analysis of a plurality of stations can be conveniently carried out, and the method is applied to operation and maintenance of unmanned stations or centralized control centers of power stations.
The theoretical electric quantity Gr (i) calculated by the electric quantity of the standard photovoltaic module 11 and the theoretical electric quantity E calculated by the value measured by the solar radiation comprehensive observation station 1 are subjected to correlation inspection, so that wrong electric quantity data can be found and eliminated in time.
A backboard temperature detection device 2 is added in all photovoltaic modules, Bt100 is adopted by the backboard temperature detection device 2, and the real-time temperature T ℃ of the backboard of the photovoltaic module can be obtained by the backboard temperature detection device 2. The theoretical generating capacity E of the power station is calculated and obtained by verifying the temperature coefficient of the inclined plane irradiation value Gj of the solar radiation comprehensive observation station 1 through the working temperature of the back plate of the photovoltaic module, and the result is uploaded to the cloud platform 14 and used for verifying the measurement accuracy of the comparison photovoltaic module 12, timely finding and rejecting wrong electric quantity data and preventing false alarm.
By collecting the illumination data of the environment monitor and the working temperature of the back plate of the photovoltaic module, the theoretical generated energy of the power station is calculated and obtained according to the following existing formula:
wherein: pa: designing the area of the array surface of the photovoltaic area determined by the data; eta STC: photovoltaic module conversion efficiency under standard conditions; gj: the array surface irradiation amount of each measurement period j; beta: temperature coefficient of the photovoltaic module; mi: measuring data duration measurement time; TMeasj: operating temperature of the photovoltaic module during measurement; tmodn: the expected operating temperature of the photovoltaic module per month; n: measuring the month; j: the time is measured.
In order to ensure that the system can stably and reliably operate and avoid that valuable meteorological data are lost due to untimely equipment fault discovery or untimely data precision loss and cannot be timely perceived, the system can utilize the inherent relation of various irradiation data acquired by the solar radiation comprehensive observation station 1, when the irradiation data are abnormal, the inherent relevance of the irradiation data is poor, and a worker can timely discover the occurrence of problems and process faults.
The photovoltaic power station SCADA system is in communication interface butt joint with the remote centralized control and cloud platform 14, and data can be uploaded to the cloud platform 14 and the monitoring system.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The system for detecting the power generation loss of the photovoltaic module is characterized by comprising an upper computer (13), a controller (9), a standard photovoltaic module (11) and a comparison photovoltaic module (12);
inverters (8) are arranged on the standard photovoltaic module (11) and the comparison photovoltaic module (12), the inverters (8) are used for measuring current, voltage and power of the standard photovoltaic module (11) and the comparison photovoltaic module (12), a cleaning device is arranged on the standard photovoltaic module (11), the controller (9) is used for controlling the cleaning device to clean the standard photovoltaic module (11), the output end of the inverter (8) is connected with the input end of the controller (9), the input end of the cleaning device is connected with the output end of the controller (9), and the controller (9) is in two-way connection with an upper computer (13);
the number of the standard photovoltaic modules (11) and the number of the comparison photovoltaic modules (12) are respectively two, the two standard photovoltaic modules (11) and the two comparison photovoltaic modules (12) work simultaneously, the two standard photovoltaic modules (11) form a group, and the two comparison photovoltaic modules (12) form a group.
2. The system for detecting the loss of the power generation amount of the photovoltaic module as claimed in claim 1, wherein the controller (9) is further connected with a solar radiation detection device, the standard photovoltaic module (11) and the comparison photovoltaic module (12) are respectively provided with a backboard temperature detection device (2), and the output end of the solar radiation detection device and the output end of the backboard temperature detection device (2) are connected with the input end of the controller (9).
3. The system for detecting the loss of power generation capacity of the photovoltaic module as recited in claim 2, characterized in that the solar radiation detection device adopts a solar radiation comprehensive observation station (1).
4. A photovoltaic module power generation loss detection system according to claim 1, characterized in that two different types of cleaning devices are provided for two standard photovoltaic modules (11), respectively.
5. The system for detecting the power generation amount loss of the photovoltaic module according to claim 4, wherein one set of the cleaning device comprises a cleaning brush (3), an electric telescopic rod (4) and a module fixing clamp (5), the module fixing clamp (5) is fixed on a standard photovoltaic module (11), the electric telescopic rod (4) is fixed on the module fixing clamp (5), the electric telescopic rod (4) is positioned above the standard photovoltaic module (11), the electric telescopic rod (4) is parallel to the long edge of the standard photovoltaic module (11), and the input end of the electric telescopic rod (4) is connected with the output end of the controller (9); the cleaning brush (3) is fixed at the output end of the electric telescopic rod (4), the cleaning brush (3) is in surface contact with the standard photovoltaic module (11), the cleaning brush (3) is parallel to the short side of the standard photovoltaic module (11), and the length of the cleaning brush is not less than the length of the short side of the standard photovoltaic module (11);
the other set of cleaning device consists of a cleaning brush (3), rollers and rails, wherein the cleaning brush (3) is rod-shaped, bristles are arranged on the peripheral surface of the cleaning brush, the two rollers are positioned at the two ends of the cleaning brush (3), the two sides of the photovoltaic module are respectively provided with the rails, and the rollers are arranged on the rails;
the two sets of cleaning devices are connected with a cleaning liquid device (6), the cleaning liquid device (6) comprises a pipeline, a pump and a container storing cleaning liquid, the container is connected with the cleaning brush (3) through the pipeline, and the pump is connected with the pipeline.
6. The photovoltaic module power generation amount loss detection system according to claim 1, wherein the upper computer (13) adopts a photovoltaic power station SCADA system.
7. The system for detecting the loss of power generation amount of the photovoltaic module as claimed in claim 1, wherein the controller (9) is connected with a power supply device (10) for supplying power to the controller (9).
8. The system for detecting the loss of power generation amount of the photovoltaic module as claimed in claim 7, wherein the power supply device (10) adopts a 12V storage battery.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362664A (en) * | 2021-12-29 | 2022-04-15 | 广东南控电力有限公司 | But remote control's photovoltaic module washs matrix device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362664A (en) * | 2021-12-29 | 2022-04-15 | 广东南控电力有限公司 | But remote control's photovoltaic module washs matrix device |
| CN114362664B (en) * | 2021-12-29 | 2024-03-22 | 广东南控电力有限公司 | Remote-control photovoltaic module cleaning matrix device |
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