A photovoltaic power station comprehensive efficiency test system with remote data transmission function

Abstract

The present invention relates to a photovoltaic power station comprehensive efficiency test system with a remote data transmission function, which belongs to the field of photovoltaic power. The present invention includes a power module, a data collector, a control mainboard, a wireless data transmission module, a computer terminal, a data analysis system and a temperature collector, a irradiance meter and a fixed fixture structure. The data collector, the control mainboard and the wireless data transmission module are all powered by the power module; the data analysis system is installed on the computer terminal, and the irradiance meter matches the fixed fixture structure. The irradiance meter collects solar irradiation data in the photovoltaic power station area, and the irradiance meter is connected to the wireless data transmission module in real time through a built-in wireless data transmitter to transmit data synchronously. The present invention has a simple and reasonable structural design, is safe and reliable, and has comprehensive functions, which is convenient for realizing the automation of the comprehensive efficiency of photovoltaic power stations and long-term unmanned monitoring.

Description

Technical Field

[0001] The present invention relates to a testing system, and in particular to a photovoltaic power station comprehensive efficiency testing system with a remote data transmission function, which belongs to the photovoltaic field. Background Art

[0002] At present, the monitoring and calculation methods of the comprehensive efficiency of photovoltaic power stations are not perfect, and most stations only rely on the data collected by the optical power prediction system for monitoring. Due to the uneven quality of the optical power prediction system and the unsatisfactory installation and operation of the meteorological station, the analysis results and reliability of the comprehensive efficiency of photovoltaic power stations are still poor. In addition, due to the long time span of the comprehensive efficiency analysis of photovoltaic power stations, high requirements are placed on data storage and transmission. Existing analysis equipment, such as fixed meteorological stations, is large in size and weight, and the data collected by the meters and collectors used are mostly transmitted by wired connection to computer terminals, which is inconvenient to install and move, the labor cost of on-site maintenance is high, and data reading and analysis are inconvenient.

[0003] After searching the descriptions of some existing related patents, it was found that most of the existing patents in the same application field provided explanations and descriptions of efficiency evaluation and calculation methods for photovoltaic power stations, and no patents were found that were similar or relevant to the photovoltaic power station comprehensive efficiency test system with remote data transmission function of the present application.

[0004] A Chinese patent with a publication date of February 3, 2016 and a publication number of CN205017271U discloses a utility model patent entitled "A photovoltaic power station system efficiency detection device". The patent is connected to a photovoltaic power station, which is connected to the public power grid through a grid connection point. The photovoltaic power station includes photovoltaic modules. The detection device includes a module environmental parameter test module, a power test module and an industrial computer. The module environmental parameter test module is connected to the photovoltaic module, the power test module is connected to the grid connection point and connected to the module environmental parameter test module through a wireless network, and the industrial computer is connected to the power test module. Although the patent has the advantages of small data acquisition error, high test accuracy, and low cost; however, the above-mentioned patent in a similar application field, the detection device for the efficiency of the photovoltaic system proposed is mainly aimed at the power generation efficiency of the equipment of the photovoltaic array, which is different from the application field of this application and has different application scenarios.

[0005] Therefore, it is particularly necessary to provide a test system that can realize unattended and remote synchronous data analysis in the process of long-term comprehensive efficiency analysis of photovoltaic power stations, improve operating efficiency, and reduce on-site manpower costs. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a photovoltaic power station comprehensive efficiency test system with a remote data transmission function that has a simple and reasonable structural design, is safe and reliable, has comprehensive functions, and is convenient for realizing the automation of the comprehensive efficiency of photovoltaic power stations and long-term unmanned monitoring.

[0007] The technical solution adopted by the present invention to solve the above problems is: the photovoltaic power station comprehensive efficiency test system with remote data transmission function includes a power module, a data collector, a control mainboard, a wireless data transmission module, a computer terminal, a data analysis system and a temperature collector, wherein the data collector, the control mainboard and the wireless data transmission module are all powered by the power module; the temperature collector collects the backplane temperature and the ambient temperature of the sample assembly in the photovoltaic power station; the wireless data transmission module receives the data in real time and transmits all the collected data to the data collector, which is then transmitted to the computer terminal after being processed by the control mainboard; the data collector receives the data signal fed back by the sensor, saves it in the control mainboard, and transmits it to the computer terminal through The wireless data transmission module communicates with the computer terminal; the data analysis system is installed in the computer terminal, and the data analysis system monitors and outputs data in real time, and is characterized in that: it also includes a irradiance meter and a fixed fixture structure, the irradiance meter and the fixed fixture structure match each other, the irradiance meter collects solar irradiation data in the photovoltaic power station area, and the irradiance meter is connected to the wireless data transmission module in real time through a built-in wireless data transmitter to transmit data synchronously; the fixed fixture structure includes a base, a telescopic clamp and a screw-on fixing clamp, the telescopic clamp is fixed to the irradiance meter, and is fixed to the side frame of the outermost component of the photovoltaic array through the screw-on fixing clamp, and the base is flush with the photovoltaic component.

[0008] Preferably, the present invention also includes a protective shell, which integrates and packages the power module, data acquisition device, control main board and wireless data transmission module, and the side wall of the protective shell is provided with a wireless signal antenna interface, an ambient temperature sensor interface, a power interface and a backup interface.

[0009] Preferably, the temperature collector of the present invention includes a component backplane temperature sensor and an ambient temperature sensor. The component backplane temperature sensor is attached to the component backplane to collect the component backplane temperature during operation and transmit it wirelessly to the test system. The ambient temperature sensor is connected to the test system to collect the ambient temperature value during the test.

[0010] Preferably, the data collector of the present invention adopts a CR1000 data collector.

[0011] Preferably, the data collector of the present invention includes data acquisition ports for irradiance, component backplane temperature and ambient temperature, and is equipped with 5 spare acquisition ports.

[0012] Preferably, the control mainboard of the present invention has built-in data processing and memory.

[0013] Preferably, the wireless data transmission module of the present invention adopts wireless communication.

[0014] Preferably, the temperature collector of the present invention adopts a wireless temperature sensor; the component backplane temperature sensor adopts a wireless type, and the ambient temperature sensor adopts a wired type, and the ambient temperature sensor adopts a Beta Therm type thermocouple.

[0015] Preferably, the irradiance meter of the present invention adopts a standard battery-type irradiance meter with high precision, high durability and controllable cost.

[0016] Preferably, the protective shell of the present invention adopts an industrial-grade protective shell.

[0017] Compared with the prior art, the present invention has the following advantages and effects: 1) The test system is designed to be portable and integrated, with a small size and light weight, which is convenient for on-site testing and analysis of photovoltaic power stations. It is also equipped with a convenient irradiance meter fixing fixture, which can accurately adjust the irradiance meter measurement inclination plane to make it consistent with the inclination of the photovoltaic array, thereby ensuring accurate data collection; 2) Based on the actual needs of photovoltaic power station performance analysis, a field test and analysis device for the comprehensive efficiency of the entire photovoltaic power station and the comprehensive efficiency of the inverter area is proposed, which can provide a convenient testing method for on-site analysis of the comprehensive performance indicators of the power generation system for the power station; 3) The equipment is equipped with a remote data transmission function, which can realize unattended and remote synchronous data analysis during the long-term comprehensive efficiency analysis of the photovoltaic power station, thereby improving operation efficiency and reducing on-site manpower costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the test system according to an embodiment of the present invention.

[0019] Figure 2 It is a front view schematic diagram of the fixing fixture structure in an embodiment of the present invention.

[0020] Figure 3 1 is a top view schematic diagram of a fixing fixture structure in an embodiment of the present invention.

[0021] Figure 4 2 is a side view schematic diagram of a fixing fixture structure in an embodiment of the present invention.

[0022] In the figure: power module 1, data collector 2, control main board 3, wireless data transmission module 4, wireless signal antenna interface 5, ambient temperature sensor interface 6, power interface 7, irradiance meter 8, component backplane temperature sensor 9, protective casing 10, computer terminal 11, data analysis system 12, temperature collector 13; fixed clamp structure 14, base 141, telescopic clamp 142, screw-on fixed clamp 143. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0024] Example

[0025] See also Figures 1 to 4 The photovoltaic power station comprehensive efficiency test system with remote data transmission function in this embodiment includes a power module 1, a data collector 2, a control mainboard 3, a wireless data transmission module 4, a irradiance meter 8, a computer terminal 11, a data analysis system 12, a temperature collector 13 and a fixing fixture structure 14; the data collector 2, the control mainboard 3 and the wireless data transmission module 4 are all powered by the power module 1; the control mainboard 3 has built-in data processing and storage; the temperature collector 13 collects the backplane temperature and ambient temperature of the sample components in the photovoltaic power station.

[0026] The wireless data transmission module 4 of the present embodiment adopts a wireless communication method; the wireless data transmission module 4 test system integrates the wireless data transmission module 4, which, on the one hand, transmits the data signals of the irradiance meter 8 and the component backplane temperature sensor 9 to the data collector 2, and on the other hand, can upload the data stored and preprocessed in the test system control mainboard 3 into a specified format in real time to the computer terminal 11 for software monitoring; long-term unmanned monitoring can be realized.

[0027] In this embodiment, the data collector 2 receives the data signal fed back by the sensor, stores it in the control mainboard 3 , and communicates with the computer terminal 11 through the wireless data transmission module 4 .

[0028] The data collector 2 of this embodiment is designed and integrated based on the CR1000 data collector; the data collector 2 includes data acquisition ports for irradiance, component backplane temperature and ambient temperature, and is equipped with 5 spare acquisition ports. It is connected to the wireless data transmission module 4, the ambient temperature sensor interface 6 and the data storage device in the control main board 3 inside the test system, and the data collected by each sensor is collected in real time, and then transmitted to the storage device in the control main board 3 for recording. While recording, the data can be transmitted to the computer terminal 11 software through the wireless data transmission module 4 in a fixed format, which is convenient for the operator to monitor and check. After the test process is completed, the detection data can also be directly copied through the data storage device in the control main board 3 for offline analysis.

[0029] This embodiment is equipped with a data analysis system 12, which can calculate the comprehensive efficiency value of the collected irradiance and temperature data and the input synchronous power generation data by hourly correspondence, and form a data packet output in the form of an electronic spreadsheet.

[0030] The data analysis system 12 of this embodiment is installed in the computer terminal 11 in the form of software, and its functions are real-time monitoring and data analysis output. The real-time monitoring function realizes the real-time update of the data of each point collected by the data collector 2 on the computer terminal 11, which is convenient for the operator to monitor. The data analysis output function realizes the test point data collected by the data collector 2 during the test cycle, and corresponds to the time point table according to the set collection time interval, and outputs an electronic spreadsheet that can be directly viewed or calculated and analyzed by the operator. After the operator inputs the collected power data or the power data read out through the power station gateway table, the calculation formula embedded in the electronic spreadsheet will give the corresponding inverter area or the whole station comprehensive efficiency according to the standard calculation method of the comprehensive efficiency of the photovoltaic power station.

[0031] In this embodiment, the irradiance meter 8 matches the fixing fixture structure 14 , and the irradiance meter 8 collects solar irradiation data in the photovoltaic power station area.

[0032] This embodiment is equipped with a high-precision irradiance meter 8 and a temperature collector 13, which can collect parameters such as irradiance, component backplane temperature, ambient temperature, etc. at the photovoltaic power station site in real time and accurately, and realize real-time data storage, feedback and processing through wireless and wired data transmission.

[0033] The irradiance meter 8 of this embodiment uses a high-precision, high-durability, and cost-controlled standard battery-type irradiance meter 8 as the irradiance data collector 2. The irradiance meter 8 is equipped with a convenient fixing fixture structure 14, which can be adjusted according to the inclination angle of the group string to fix the irradiance meter 8 in the inclination plane of the component to ensure that the collected irradiance data is consistent with the actual resources received on the surface of the component. The irradiance meter 8 is connected to the system wireless data transmission module 4 in real time through a built-in wireless data transmitter to transmit data synchronously. Compared with the traditional thermopile irradiance meter 8, while ensuring the test accuracy, the overall cost of the equipment is reduced.

[0034] See also Figure 2-Figure 4 The fixing clamp structure 14 is mainly designed to fix the irradiance meter 8. The fixing clamp structure 14 includes a base 141, a telescopic clamp 142 and a screw-on fixing clamp 143, so that the irradiance meter 8 can maintain the same inclination angle as the on-site photovoltaic component, ensuring that the collected irradiance data is basically consistent with the actual irradiance value in the plane of the photovoltaic array; ensuring the accuracy of irradiance data collection. The telescopic clamp 142 fixes the irradiance meter 8, which can be placed on the side of the photovoltaic string as a whole, and is fixed to the side frame of the outermost component of the photovoltaic array through the screw-on fixing clamp 143. The base 141 is flush with the photovoltaic component, which ensures that the irradiance meter 8 has the same inclination angle as the photovoltaic component.

[0035] The protective shell 10 of this embodiment adopts an industrial-grade protective shell, which integrates and packages the above-mentioned functional modules: power module 1, data acquisition unit 2, control main board 3 and wireless data transmission module 4. The side wall of the protective shell 10 is provided with a wireless signal antenna interface 5, an ambient temperature sensor interface 6, a power interface 7 and a spare interface, etc.

[0036] The temperature collector 13 of this embodiment includes a component backplane temperature sensor 9 and an ambient temperature sensor. The wireless temperature sensor is attached to the component backplane to directly collect the component backplane temperature during operation and transmit it wirelessly to the test system. The ambient temperature sensor is still connected to the test system via a wired connection to collect the ambient temperature value during the test through the test end exposed to the air.

[0037] In this embodiment, the temperature collector 13 adopts a wireless temperature sensor; the component backplane temperature sensor 9 adopts a wireless type, and the ambient temperature sensor adopts a wired type, and the ambient temperature sensor adopts a Beta Therm type thermocouple.

[0038] This embodiment introduces wireless data transmission and integrated design to achieve lightweight, portable and wireless data transmission of the test system. At the same time, based on the comprehensive efficiency calculation principle of the photovoltaic power generation system, it can collect key data such as irradiance and temperature, and integrate the inverter and photovoltaic system power generation data to conduct test analysis on the comprehensive efficiency of the photovoltaic power station.

[0039] This embodiment is based on the actual needs of comprehensive energy efficiency analysis of photovoltaic power stations, and designs a test system that integrates irradiance, temperature acquisition sensors, data transmission and analysis systems, and other professional accessories. By combining high-precision sensors with wireless communication technology, the flexibility of data acquisition and measurement point layout is improved while ensuring data acquisition accuracy, and the convenience of using the test system is greatly improved. The design adopts a modular integrated design, so that the test system takes into account both portability and safety and sealing for outdoor use. At the same time, the system is equipped with data recording and analysis software, which can realize automatic analysis and result feedback after data acquisition.

[0040] Through the above description, those skilled in the art can already implement it.

[0041] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A photovoltaic power station comprehensive efficiency test system with remote data transmission function, comprising a power module (1), a data collector (2), a control mainboard (3), a wireless data transmission module (4), a computer terminal (11), a data analysis system (12) and a temperature collector (13), wherein the data collector (2), the control mainboard (3) and the wireless data transmission module (4) are all powered by the power module (1); the temperature collector (13) collects the back panel temperature and the ambient temperature of the sample assembly in the photovoltaic power station; the wireless data transmission module (4) receives data in real time and transmits all collected data to the data collector (2), which is then processed by the control mainboard (3) and then transmitted to the computer terminal (11); the data collector (2) receives data signals fed back by the sensor, stores them in the control mainboard (3), and communicates with the computer terminal (11) through the wireless data transmission module (4); the data analysis system (12) is installed in the computer terminal (11), and the data analysis system (12) performs real-time monitoring and data analysis output, characterized in that: It also includes a radiometer (8), a fixing fixture structure (14) and a protective housing (10); the radiometer (8) and the fixing fixture structure (14) match each other; the radiometer collects solar irradiation data in the photovoltaic power station area; the radiometer (8) is connected to the wireless data transmission module (4) in real time via a built-in wireless data transmitter to synchronously transmit data; the fixing fixture structure (14) includes a base (141), a telescopic fixture (142) and a screw-type fixing clamp (143); the telescopic fixture (142) is fixed to the radiometer (8) and is fixed to the side frame of the outermost component of the photovoltaic array via the screw-type fixing clamp (143); the base (141) is flush with the photovoltaic component; the protective housing (10) The protective housing (10) is integrated and packaged in a power module (1), a data collector (2), a control mainboard (3) and a wireless data transmission module (4); the side wall of the protective housing (10) is provided with a wireless signal antenna interface (5), an ambient temperature sensor interface (6), a power interface (7) and a spare interface; the temperature collector (13) comprises a component backplane temperature sensor (9) and an ambient temperature sensor; the component backplane temperature sensor (9) is attached to the component backplane, collects the component backplane temperature during operation, and transmits it wirelessly to the test system; the ambient temperature sensor is connected to the test system, and collects the ambient temperature value during the test; the data collector (2) comprises data collection ports for irradiance, component backplane temperature and ambient temperature, and is equipped with 5 spare collection ports.

2. The photovoltaic power station comprehensive efficiency test system with remote data transmission function according to claim 1 is characterized in that: The data collector (2) is a CR1000 data collector.

3. The photovoltaic power station comprehensive efficiency test system with remote data transmission function according to claim 1 is characterized in that: The control mainboard (3) has built-in data processing and storage.

4. The photovoltaic power station comprehensive efficiency test system with remote data transmission function according to claim 1 is characterized in that: The wireless data transmission module (4) adopts a wireless communication method.

5. The photovoltaic power station comprehensive efficiency test system with remote data transmission function according to claim 1 is characterized in that: The temperature collector (13) adopts a wireless temperature sensor; the component backplane temperature sensor (9) adopts a wireless type, and the ambient temperature sensor adopts a wired type, and the ambient temperature sensor adopts a Beta Therm type thermocouple.

6. The photovoltaic power station comprehensive efficiency test system with remote data transmission function according to claim 1 is characterized in that: The irradiance meter (8) is a standard battery-type irradiance meter with high precision, high durability and controllable cost.

7. The photovoltaic power station comprehensive efficiency test system with remote data transmission function according to claim 1 is characterized in that: The protective shell (10) is an industrial-grade protective shell.

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