IV test intelligent diagnosis system of photovoltaic cell array

Abstract

The utility model relates to the technical field of photovoltaic cells, and particularly discloses an IV test intelligent diagnosis system of a photovoltaic cell array, which comprises a cabinet body, a liquid crystal display screen, a photovoltaic cell array confluence module, a relay centralized control module, an intelligent control module, a photovoltaic cell array output acquisition module and a power supply module, the cabinet body is an accommodating structure of the system, a liquid crystal display screen is arranged on the surface of the cabinet body, and the photovoltaic cell array convergence module, the relay centralized control module, the intelligent control module, the photovoltaic cell array output acquisition module and the power supply module are all installed in the cabinet body. According to the IV test intelligent diagnosis system of the photovoltaic cell array, resistance parameters are controlled by an automatic control system in a program mode to change array output voltage, and compared with a traditional complex operation mode of manually changing the resistance value of an electronic load, the scanning efficiency of an IV curve is greatly improved, so that the test process is more convenient and efficient, and the test efficiency is improved. And the labor and time cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic cell technical field, concretely is a kind of IV test intelligent diagnosis system of photovoltaic cell array. BACKGROUND

[0002] In photovoltaic industry, photovoltaic cell array performance evaluation and optimization are the key link to ensure the efficient operation and long-term stability of system, in order to ensure the efficient operation of photovoltaic cell array system, the electrical performance of the photovoltaic cell array needs to be evaluated regularly.

[0003] At present, IV curve test is mainly used as the main means to evaluate the electrical performance of photovoltaic cell array, but the traditional test method mainly changes the load current and output voltage by manually changing the series light into photovoltaic cell array electronic load resistance value, obtains the IV curve diagram under different conditions, the operation is complex, and the scanning efficiency is low, or although there is IV curve automatic test equipment, but the test clip needs to be manually connected into both ends of photovoltaic cell array by the manager in the operation and maintenance process, and the possible fault reason is judged according to the curve diagram by experience, and "zero inspection" operation and maintenance cannot be realized. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of IV test intelligent diagnosis system of photovoltaic cell array, and the system changes array output voltage by automatic control system program control resistance parameter to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of IV test intelligent diagnosis system of photovoltaic cell array, including carrying part and execution part, the carrying part is arranged cabinet and is realized to the execution part is contained bearing, the surface of the cabinet is embeddedly fixed and installed with touch screen, the upper surface of the cabinet is provided with line inlet, the execution part includes photovoltaic cell array busbar module, relay centralized control module, intelligent control module, photovoltaic cell array output acquisition module, power supply module, the photovoltaic cell array busbar module is connected with photovoltaic cell array output acquisition module, the photovoltaic cell array output acquisition module is connected with intelligent control module, the intelligent control module is connected with relay centralized control module, the photovoltaic cell array busbar module, relay centralized control module, intelligent control module and photovoltaic cell array output acquisition module are connected with power supply module respectively.

[0006] Preferably, the inside of the cabinet is provided with guide rail, the guide rail is used for the installation of system component, the inside of the cabinet is provided with wire slot, and the wire slot is used for the wiring fixation of system.

[0007] The above technical scheme is adopted, and the guide rail and wire slot can be used to connect and fix the wiring of system components.

[0008] Preferably, the photovoltaic cell array bus module comprises an air switch, a surge protector, a reverse charge protection diode and a fuse, the fuse comprises a positive input end fuse and a negative input end fuse, and the air switch, the surge protector, the reverse charge protection diode and the fuse are connected in series and in parallel with the photovoltaic cell.

[0009] By using the air switch, the surge protector, the reverse charge protection diode and the fuse, the photovoltaic cell can be provided with lightning protection and overcurrent protection.

[0010] Preferably, the relay centralized control module comprises 10 control relay switches, which are respectively marked as KA1, KA2, KA3, KA4, KA5, KA6, KA7, KA8, KA9 and KA0, the KA1 is a test light source one control switch, the KA2 is a test light source two control switch, the KA3 is a test light source one left direction deflection control switch, the KA4 is a test light source two right direction deflection control switch, the KA5 is a photovoltaic cell array east direction deflection switch, the KA6 is a photovoltaic cell array west direction deflection switch, the KA7 is a photovoltaic cell array south direction deflection switch, the KA8 is a photovoltaic cell array north direction deflection switch, the KA9 is a photovoltaic cell array south direction deflection limit switch, and the KA0 is a photovoltaic cell array north direction deflection limit switch.

[0011] By using the above technical scheme, the 10 control switches match the system test test light source direction change operation, photovoltaic array azimuth change operation and limit signal.

[0012] Preferably, the intelligent control module comprises a programmable controller and a touch screen, and the touch screen communicates with the programmable controller through Ethernet.

[0013] By using the programmable controller, the photovoltaic cell array output can be collected.

[0014] Preferably, the photovoltaic cell array output collection module comprises a programmable resistance and a collector, the programmable resistance is connected with a programmable controller communication board through a free port, and the collector is connected with the programmable controller communication board through an RS485 interface.

[0015] By using the programmable controller, the programmable resistance module parameters can be changed to change the voltage across the photovoltaic array.

[0016] Preferably, the power supply module comprises an air switch and a 24V switching power supply, and the 24V switching power supply is connected with 220V mains through the air switch.

[0017] By using the power supply module, the system can be powered.

[0018] Compared with the prior art, the IV test intelligent diagnosis system of the photovoltaic cell array has the beneficial effects that:

[0019] 1. In the system, the array output voltage is changed by automatically controlling the system program-controlled resistance parameters, compared with the complex operation mode of manually changing the resistance value of the electronic load, the scanning efficiency of the IV curve is greatly improved, the test process is more convenient and efficient, and the labor and time cost is reduced.

[0020] 2. In the system, the IV curve of the group string type photovoltaic cell array can be analyzed, the abnormal power generation of the bus side and the photovoltaic cell branch can be diagnosed in real time, and the experience judgment of the manager is no longer simply relied on, but based on the intelligent analysis of the system, the fault is more accurately positioned, the manager is assisted to planly perform the photovoltaic array inspection and defect elimination work, the pertinence and efficiency of the operation and maintenance work are effectively improved, and the stable operation of the photovoltaic cell array is helped to be ensured.

[0021] 3. In the system, the bus function is provided, the bus box can be installed below the photovoltaic cell array and connected through a cable, the function integration is realized, the equipment layout of the photovoltaic power station is simplified, the number and area of the equipment are reduced, the cost and installation difficulty of the equipment are reduced, the stability and efficiency of the electric energy transmission are improved, the loss and interference of the transmission link are reduced, and the overall performance of the photovoltaic power station is improved and the efficiency of the construction is promoted. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a system structure schematic view of the utility model;

[0023] Figure 2 It is a cabinet body external structure schematic view of the utility model;

[0024] Figure 3 It is a cabinet body cabinet door inner side structure schematic view of the utility model;

[0025] Figure 4 It is a cabinet body internal structure schematic view of the utility model.

[0026] In the drawing: 1, cabinet body; 2, touch screen; 3, incoming line port; 4, wire slot; 5, control relay switch; 6, anti-reverse charging diode; 7, positive input end fuse; 8, negative input end fuse. DETAILED DESCRIPTION

[0027] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Please refer to Figures 1-4 The utility model provides a technical scheme: a kind of IV test intelligent diagnosis system of photovoltaic cell array, including cabinet 1, touch screen 2, incoming line port 3, wire slot 4, control relay switch 5, prevent reverse charging diode 6, positive input end fuse 7, negative input end fuse 8.

[0029] The mounting part is provided with a cabinet 1 to accommodate and bear the executing part, a touch screen 2 is fixedly installed on the surface of the cabinet 1 in an embedded mode, a wire inlet 3 is provided on the upper surface of the cabinet 1, the executing part includes a photovoltaic cell array bus module, a relay centralized control module, an intelligent control module, a photovoltaic cell array output acquisition module and a power supply module, the photovoltaic cell array bus module is connected with the photovoltaic cell array output acquisition module, the photovoltaic cell array output acquisition module is connected with the intelligent control module, the intelligent control module is connected with the relay centralized control module, the photovoltaic cell array bus module, the relay centralized control module, the intelligent control module and the photovoltaic cell array output acquisition module are respectively connected with the power supply module, a guide rail is arranged in the cabinet 1 and is used for mounting system components, a wire groove 4 is arranged on the inner side of the cabinet 1 and is used for fixing system wiring, the photovoltaic cell array bus module includes an air switch, a surge protector, an anti-reverse charging diode 6 and a fuse, the fuse includes a positive input end fuse 7 and a negative input end fuse 8, the air switch, the surge protector, the anti-reverse charging diode 6 and the fuse are connected in series with the photovoltaic cell, the relay centralized control module includes 10-way control relay switches 5, which are respectively marked as KA1, KA2, KA3, KA4, KA5, KA6, KA7, KA8, KA9 and KA0, KA1 is a test light source one control switch, KA2 is a test light source two control switch, KA3 is a test light source one left direction deflection control switch, KA4 is a test light source two right direction deflection control switch, KA5 is a photovoltaic cell array east direction deflection switch, KA6 is a photovoltaic cell array west direction deflection switch, KA7 is a photovoltaic cell array south direction deflection switch, KA8 is a photovoltaic cell array north direction deflection switch, KA9 is a photovoltaic cell array south direction deflection limit switch, and KA0 is a photovoltaic cell array north direction deflection limit switch, the intelligent control module includes a programmable controller and the touch screen 2, the touch screen 2 communicates with the programmable controller through Ethernet, the photovoltaic cell array output acquisition module includes a program-controlled resistor and an acquisition device, the program-controlled resistor is connected with a programmable controller communication board through a free port, the acquisition device is connected with the programmable controller communication board through an RS485 interface, and the power supply module includes an air switch and a 24V switching power supply, the 24V switching power supply is connected with 220V mains through the air switch;

[0030] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the various components of the system are installed using the guide rails provided inside the cabinet body 1, and after the connecting wires are passed through the inlet 3 into the cabinet body 1 and arranged and fixed through the wire slot 4, the photovoltaic cell array busbar module, the relay centralized control module, the intelligent control module, the photovoltaic cell array output acquisition module and the power supply module are all installed inside the cabinet body 1, and the connection of the lines between the modules is completed, and the touch screen 2 on the surface of the cabinet body 1 can be used to visually display the test data and related information, wherein the air switch, the surge protector, the anti-reverse charging diode 6, the positive input end fuse 7 and the negative input end fuse 8 in the photovoltaic cell array busbar module are connected in series or parallel with the photovoltaic cell, the air switch can cut off the circuit in time when abnormal conditions such as overload and short circuit occur in the circuit, thereby playing a protection role, the surge protector can prevent damage to the system caused by overload voltage, and the anti-reverse charging diode 6 can prevent reverse current flow, and the positive input end fuse 7 and the negative input end fuse 8 are fused when the current is too large, preventing the equipment from being damaged due to overcurrent, the 10-way control relay switch 5 is used to control the position and angle of the photovoltaic cell array to meet the test and operation requirements, the programmable controller of the intelligent control module can realize the parameter setting, start-stop control program and the like of the test system, and the programmable controller realizes the control test of the system, the output acquisition of the photovoltaic cell array, in the process of testing, the programmable controller periodically controls the change of the program-controlled resistance module parameters to change the output voltage of the photovoltaic array, realizes the IV curve scanning of the photovoltaic cell array, and the collector is used to collect the output data of the photovoltaic cell array, which is transmitted to the programmable controller for analysis and processing.

[0031] Working principle: when the photovoltaic cell array IV test intelligent diagnosis system is used, the array output voltage is changed by automatically controlling the system program-controlled resistance parameters in the system, and the IV test curve is obtained by automatically scanning the photovoltaic string based on the collector, so that the problems of low scanning efficiency and complex operation of the traditional IV curve scanning of the photovoltaic cell array can be solved, the IV curve analysis of the string type photovoltaic cell array is carried out, the abnormal power generation of the busbar side and the photovoltaic cell branch is diagnosed and analyzed in real time, the manager is assisted to plan and perform the photovoltaic array inspection and defect elimination work, the operation and maintenance efficiency is improved, and the overall practicability is improved.

[0032] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An IV test intelligent diagnosis system for photovoltaic cell array, comprising a carrying part and an executing part, the carrying part is provided with a cabinet (1) to accommodate and carry the executing part, a touch screen (2) is fixedly installed on the surface of the cabinet (1) in an embedded mode, and a wire inlet (3) is arranged on the upper surface of the cabinet (1). The execution part includes a photovoltaic cell array bus module, a relay centralized control module, an intelligent control module, a photovoltaic cell array output acquisition module and a power supply module.

2. The intelligent diagnostic system for IV test of photovoltaic cell array according to claim 1, characterized in that: The cabinet (1) is internally provided with a guide rail for mounting system components, and the inner side of the cabinet (1) is provided with a wire slot (4) for fixing the wiring of the system.

3. The intelligent diagnostic system for IV test of photovoltaic cell array according to claim 1, characterized in that: The photovoltaic cell array bus module includes an air switch, a surge protector, an anti-reverse charging diode (6) and a fuse, the fuse includes a positive input end fuse (7) and a negative input end fuse (8), and the air switch, the surge protector, the anti-reverse charging diode (6) and the fuse are connected in series with the photovoltaic cell.

4. The intelligent diagnostic system for IV test of photovoltaic cell array according to claim 1, characterized in that: The relay centralized control module includes 10-way control relay switches (5), marked as KA1, KA2, KA3, KA4, KA5, KA6, KA7, KA8, KA9 and KA0, respectively, KA1 is a test light source one control switch, KA2 is a test light source two control switch, KA3 is a test light source one left direction deflection control switch, KA4 is a test light source two right direction deflection control switch, KA5 is a photovoltaic cell array east direction deflection switch, KA6 is a photovoltaic cell array west direction deflection switch, KA7 is a photovoltaic cell array south direction deflection switch, KA8 is a photovoltaic cell array north direction deflection switch, KA9 is a photovoltaic cell array south direction deflection limit switch, and KA0 is a photovoltaic cell array north direction deflection limit switch.

5. The intelligent diagnostic system for IV test of photovoltaic cell array according to claim 1, characterized in that: The intelligent control module includes a programmable controller and a touch screen (2), and the touch screen (2) communicates with the programmable controller through Ethernet.

6. The intelligent diagnostic system for IV test of a photovoltaic cell array according to claim 1, characterized in that: The photovoltaic cell array output acquisition module includes a programmable resistor and an acquisition device, the programmable resistor is connected with a programmable controller communication board through a free port, and the acquisition device is connected with the programmable controller communication board through an RS485 interface.

7. The intelligent diagnostic system for IV test of a photovoltaic cell array according to claim 1, characterized in that: The power supply module includes an air switch and a 24V switching power supply, and the 24V switching power supply is connected with 220V mains through the air switch.

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