A photovoltaic tracking device tracking performance testing method and device

Abstract

The present invention relates to a method and device for testing the tracking performance of a photovoltaic tracking device, comprising respectively obtaining the irradiation and power generation of a photovoltaic assembly to be tested within a test period; determining the performance improvement ratio of a photovoltaic tracking device in the photovoltaic assembly to be tested within the test period according to the irradiation and power generation of the photovoltaic assembly to be tested within the test period; and testing the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested by using the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test period. The testing method of the present invention is simple to implement and is convenient for long-term testing of the tracking performance of a photovoltaic tracking device.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic testing, and in particular to a method and a device for testing tracking performance of a photovoltaic tracking device. Background Art

[0002] The photovoltaic tracking device is one of the key components of a photovoltaic power station. By controlling the photovoltaic tracking device to track the trajectory of the sun, the photovoltaic modules installed on the photovoltaic tracking device can obtain more radiation than those installed on fixed brackets, thereby increasing the power generation of the photovoltaic modules and bringing better economic benefits.

[0003] At present, in the prior art, the tracking performance test of the photovoltaic tracking device is achieved by obtaining the tracking accuracy of the photovoltaic tracking device. However, due to the limitations of the sun, test instruments and other conditions, the tracking accuracy test of the photovoltaic tracking device cannot be carried out for a long time. At the same time, when the photovoltaic tracking device is a single-axis photovoltaic tracking device, it cannot achieve full tracking of the sun's position, and there is no clear method for tracking accuracy test.

[0004] Therefore, there is a need in the art for a method for testing the tracking performance of a photovoltaic tracking device that can be tested for a long time and is simple and easy to implement. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method and device for testing the tracking performance of a photovoltaic tracking device. The performance improvement ratio of the photovoltaic tracking device is obtained by the radiation and power generation of the photovoltaic components to be tested, and the tracking performance of the photovoltaic tracking device is determined using the performance improvement ratio. The testing method of the present invention is simple to implement and is convenient for long-term testing of the tracking performance of the photovoltaic tracking device.

[0006] The purpose of the present invention is achieved by adopting the following technical solutions:

[0007] The present invention provides a method for testing the tracking performance of a photovoltaic tracking device, wherein the method comprises:

[0008] Respectively obtain the irradiation and power generation of the photovoltaic module to be tested during the test period;

[0009] Determining a performance improvement ratio of a photovoltaic tracking device in the photovoltaic assembly to be tested during the test period according to the irradiation and power generation of the photovoltaic assembly to be tested during the test period;

[0010] The tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested is tested by utilizing the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test cycle.

[0011] Preferably, the step of determining the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test period according to the irradiation and power generation of the photovoltaic assembly to be tested within the test period includes:

[0012] Determining the radiation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the radiation of the photovoltaic assembly to be tested during the test period;

[0013] Determine the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the power generation of the photovoltaic assembly to be tested during the test period;

[0014] The performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test cycle is determined according to the radiation improvement rate and the power generation improvement rate.

[0015] Furthermore, the step of determining the radiation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the radiation of the photovoltaic assembly to be tested during the test period includes:

[0016] The irradiance increase rate η of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period is determined by the following formula: H :

[0017]

[0018] In the formula, H b is the average irradiation of the photovoltaic module under standard conditions during the test period, H d It is the average irradiation of the PV module under test during the test period.

[0019] Furthermore, the step of determining the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested within the test period according to the power generation of the photovoltaic assembly to be tested within the test period includes:

[0020] The power generation increase rate η of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period is determined by the following formula: E :

[0021]

[0022] In the formula, E b is the average power generation of the PV modules under standard conditions during the test period, E d It is the average power generation of the PV module under test during the test period.

[0023] Further, the determining of the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test cycle according to the radiation improvement rate and the power generation improvement rate includes:

[0024] The performance improvement ratio η of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test period is determined by the following formula:

[0025]

[0026] Where η H is the irradiance increase rate of the photovoltaic tracking device in the photovoltaic unit under test during the test period, η E It is the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit under test during the test period.

[0027] Furthermore, the standard situation is that the inclination angle of the photovoltaic module is 25 degrees.

[0028] Preferably, the step of testing the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested by using the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test cycle includes:

[0029] If the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested is greater than the preset limit value during the test cycle, the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested is qualified, otherwise it is unqualified.

[0030] Based on the same inventive concept, the present invention also provides a photovoltaic tracking device tracking performance test device, the improvement of which is that the device comprises:

[0031] An acquisition unit, used to respectively acquire the irradiation and power generation of the photovoltaic module to be tested during the test period;

[0032] A determination unit, configured to determine a performance improvement ratio of a photovoltaic tracking device in the photovoltaic assembly to be tested within the test period according to the irradiation and power generation of the photovoltaic assembly to be tested within the test period;

[0033] The testing unit is used to test the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested by utilizing the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the testing cycle.

[0034] Preferably, the determining unit includes:

[0035] A first determination module is used to determine the radiation increase rate of the photovoltaic tracking device in the photovoltaic group to be tested within the test period according to the radiation of the photovoltaic assembly to be tested within the test period;

[0036] The second determination module is used to determine the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the power generation of the photovoltaic assembly to be tested during the test period;

[0037] The third determination module is used to determine the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test cycle according to the radiation improvement rate and the power generation improvement rate.

[0038] Preferably, the testing unit is specifically used for:

[0039] If the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested is greater than the preset limit value during the test cycle, the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested is qualified, otherwise it is unqualified.

[0040] Compared with the closest prior art, the present invention has the following beneficial effects:

[0041] The present invention provides a method and device for testing the tracking performance of a photovoltaic tracking device, which respectively obtain the irradiation and power generation of a photovoltaic module to be tested within a test period; determine the performance improvement ratio of a photovoltaic tracking device in the photovoltaic module to be tested within the test period according to the irradiation and power generation of the photovoltaic module to be tested within the test period; and test the tracking performance of the photovoltaic tracking device in the photovoltaic module to be tested by using the performance improvement ratio of the photovoltaic tracking device in the photovoltaic module to be tested within the test period. The present invention determines the performance improvement ratio of the photovoltaic tracking device in the photovoltaic module to be tested by the irradiation and power generation of the photovoltaic module to be tested, and tests the tracking performance of the photovoltaic tracking device based on the performance improvement ratio. The testing method is simple to implement and convenient for long-term testing, and at the same time provides an effective means for analyzing and evaluating the tracking performance of the photovoltaic tracking device, filling the gap in outdoor tracking performance evaluation of the photovoltaic tracking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a flow chart of a method for testing the tracking performance of a photovoltaic tracking device of the present invention;

[0043] Figure 2 It is a schematic diagram of a tracking performance testing device for a photovoltaic tracking device of the present invention. DETAILED DESCRIPTION

[0044] The specific implementation modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The present invention provides a method for testing the tracking performance of a photovoltaic tracking device. Figure 1 As shown, the method includes:

[0047] Step 1. Obtain the irradiation and power generation of the photovoltaic module to be tested during the test period respectively;

[0048] Step 2. Determine the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test period according to the irradiation and power generation of the photovoltaic assembly to be tested during the test period;

[0049] Step 3: Testing the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested by utilizing the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test cycle.

[0050] In order to more clearly illustrate the purpose of the present invention, the method of the present invention is described in detail through the following examples.

[0051] In an embodiment of the present invention, a photovoltaic module under standard conditions is set in the photovoltaic power station to which the photovoltaic module to be tested belongs. The photovoltaic module is fixed by a fixed bracket and belongs to the same product batch as the photovoltaic module to be tested. The standard condition is that the inclination angle of the photovoltaic module is 25 degrees; this inclination angle is the optimal inclination angle of the photovoltaic power station in the area to which the photovoltaic module to be tested belongs.

[0052] In an embodiment of the present invention, the above step 1 of obtaining the irradiation and power generation of the photovoltaic module to be tested during the test period includes:

[0053] Collecting data of the irradiance meter of the photovoltaic module to be tested during the test period and using it as the irradiance of the photovoltaic module to be tested during the test period;

[0054] The data of the DC side of the micro grid-connected inverter of the PV module to be tested is collected and used as the power generation of the PV module to be tested during the test period.

[0055] In an embodiment of the present invention, the above step 2 determines the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test period according to the irradiation and power generation of the photovoltaic assembly to be tested during the test period, including:

[0056] Step 21. Determine the radiation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the radiation of the photovoltaic assembly to be tested during the test period;

[0057] Step 22. Determine the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the power generation of the photovoltaic assembly to be tested during the test period;

[0058] Step 23: Determine the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test cycle according to the radiation improvement rate and the power generation improvement rate.

[0059] The above step 21. determining the radiation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the radiation of the photovoltaic assembly to be tested during the test period includes:

[0060] The irradiance increase rate η of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period is determined by the following formula: H :

[0061]

[0062] In the formula, H b is the average irradiation of the photovoltaic module under standard conditions during the test period, H d It is the average irradiation of the PV module under test during the test period.

[0063] The above step 22. determining the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the power generation of the photovoltaic assembly to be tested during the test period includes:

[0064] The power generation increase rate η of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period is determined by the following formula: E :

[0065]

[0066] In the formula, E b is the average power generation of the PV modules under standard conditions during the test period, E d It is the average power generation of the PV module under test during the test period.

[0067] The above step 23. determining the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test cycle according to the irradiation improvement rate and the power generation improvement rate includes:

[0068] The performance improvement ratio η of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test period is determined by the following formula:

[0069]

[0070] Where η H is the irradiance increase rate of the photovoltaic tracking device in the photovoltaic unit under test during the test period, η E It is the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit under test during the test period.

[0071] In an embodiment of the present invention, the above step 3. testing the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested by using the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test cycle includes:

[0072] If the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested is greater than the preset limit value during the test cycle, the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested is qualified, otherwise it is unqualified.

[0073] Based on the same inventive concept, the present invention also provides a photovoltaic tracking device tracking performance test device, such as Figure 2 As shown, the device comprises:

[0074] An acquisition unit, used to respectively acquire the irradiation and power generation of the photovoltaic module to be tested during the test period;

[0075] A determination unit, configured to determine a performance improvement ratio of a photovoltaic tracking device in the photovoltaic assembly to be tested within the test period according to the irradiation and power generation of the photovoltaic assembly to be tested within the test period;

[0076] The testing unit is used to test the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested by utilizing the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the testing cycle.

[0077] Preferably, the determining unit includes:

[0078] A first determination module is used to determine the radiation increase rate of the photovoltaic tracking device in the photovoltaic group to be tested within the test period according to the radiation of the photovoltaic assembly to be tested within the test period;

[0079] The second determination module is used to determine the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the power generation of the photovoltaic assembly to be tested during the test period;

[0080] The third determination module is used to determine the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test cycle according to the radiation improvement rate and the power generation improvement rate.

[0081] Furthermore, the first determining module is specifically used to:

[0082] The irradiance increase rate η of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period is determined by the following formula: H :

[0083]

[0084] In the formula, H b is the average irradiation of the photovoltaic module under standard conditions during the test period, H d It is the average irradiation of the PV module under test during the test period.

[0085] Furthermore, the second determination module is specifically used to:

[0086] The power generation increase rate η of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period is determined by the following formula: E :

[0087]

[0088] In the formula, E b is the average power generation of the PV modules under standard conditions during the test period, E d It is the average power generation of the PV module under test during the test period.

[0089] Furthermore, the third determination module is specifically used to:

[0090] The performance improvement ratio η of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test period is determined by the following formula:

[0091]

[0092] Where η H is the irradiance increase rate of the photovoltaic tracking device in the photovoltaic unit under test during the test period, η E It is the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit under test during the test period.

[0093] Furthermore, the standard situation is that the inclination angle of the photovoltaic module is 25 degrees.

[0094] Preferably, the testing unit is specifically used for:

[0095] If the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested is greater than the preset limit value during the test cycle, the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested is qualified, otherwise it is unqualified.

[0096] In summary, the present invention provides a method and device for testing the tracking performance of a photovoltaic tracking device, which respectively obtain the irradiation and power generation of the photovoltaic assembly to be tested within a test period; determine the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test period according to the irradiation and power generation of the photovoltaic assembly to be tested within the test period; and test the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested by using the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test period. The present invention determines the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested by the irradiation and power generation of the photovoltaic assembly to be tested, and tests the tracking performance of the photovoltaic tracking device based on the performance improvement ratio. The testing method is simple to implement and convenient for long-term testing. At the same time, it provides an effective means for analyzing and evaluating the tracking performance of the photovoltaic tracking device, filling the gap in the outdoor tracking performance evaluation of the photovoltaic tracking device.

[0097] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0098] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0099] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0100] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for testing the tracking performance of a photovoltaic tracking device, characterized in that: The method comprises: Respectively obtain the irradiation and power generation of the photovoltaic module to be tested during the test period; Determining a performance improvement ratio of a photovoltaic tracking device in the photovoltaic assembly to be tested during the test period according to the irradiation and power generation of the photovoltaic assembly to be tested during the test period; Testing the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested by using the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test cycle; The step of determining the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test period according to the irradiation and power generation of the photovoltaic assembly to be tested within the test period includes: Determining the radiation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the radiation of the photovoltaic assembly to be tested during the test period; Determine the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period according to the power generation of the photovoltaic assembly to be tested during the test period; Determine the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test period according to the radiation improvement rate and the power generation improvement rate; The step of determining the radiation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested within the test period according to the radiation of the photovoltaic assembly to be tested within the test period includes: The irradiance increase rate η of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period is determined by the following formula: H : In the formula, H b is the average irradiation of the photovoltaic module under standard conditions during the test period, H d is the average irradiance of the PV module under test during the test period; The method of determining the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested within the test period according to the power generation of the photovoltaic assembly to be tested within the test period includes: The power generation increase rate η of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period is determined by the following formula: E : In the formula, E b is the average power generation of the PV modules under standard conditions during the test period, E d is the average power generation of the PV module under test during the test period; The method of determining the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test cycle according to the radiation improvement rate and the power generation improvement rate includes: The performance improvement ratio η of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test period is determined by the following formula: Where η H is the irradiance increase rate of the photovoltaic tracking device in the photovoltaic unit under test during the test period, η E It is the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period; The standard case is that the inclination angle of the photovoltaic module is 25 degrees.

2. The method according to claim 1, characterized in that The method of testing the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested by using the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test cycle includes: If the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested is greater than the preset limit value during the test cycle, the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested is qualified, otherwise it is unqualified.

3. A photovoltaic tracking device tracking performance test device, characterized in that: The device comprises: An acquisition unit, used to respectively acquire the irradiation and power generation of the photovoltaic module to be tested during the test period; A determination unit, configured to determine a performance improvement ratio of a photovoltaic tracking device in the photovoltaic assembly to be tested within the test period according to the irradiation and power generation of the photovoltaic assembly to be tested within the test period; A testing unit, used for testing the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested by utilizing the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test cycle; The determining unit comprises: A first determination module is used to determine the radiation increase rate of the photovoltaic tracking device in the photovoltaic group to be tested within the test period according to the radiation of the photovoltaic assembly to be tested within the test period; The second determination module is used to determine the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested within the test period according to the power generation of the photovoltaic assembly to be tested within the test period; A third determination module is used to determine the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested within the test period according to the radiation improvement rate and the power generation improvement rate; The first determining module is specifically configured to: The irradiance increase rate η of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period is determined by the following formula: H : In the formula, H b is the average irradiation of the photovoltaic module under standard conditions during the test period, H d is the average irradiance of the PV module under test during the test period; The second determining module is specifically used to: The power generation increase rate η of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period is determined by the following formula: E : In the formula, E b is the average power generation of the PV modules under standard conditions during the test period, E d is the average power generation of the PV module under test during the test period; The third determination module is specifically used to: The performance improvement ratio η of the photovoltaic tracking device in the photovoltaic assembly to be tested during the test period is determined by the following formula: Where η H is the irradiance increase rate of the photovoltaic tracking device in the photovoltaic unit under test during the test period, η E It is the power generation increase rate of the photovoltaic tracking device in the photovoltaic unit to be tested during the test period; The standard case is that the inclination angle of the photovoltaic module is 25 degrees.

4. The device according to claim 3, characterized in that The testing unit is specifically used for: If the performance improvement ratio of the photovoltaic tracking device in the photovoltaic assembly to be tested is greater than the preset limit value during the test cycle, the tracking performance of the photovoltaic tracking device in the photovoltaic assembly to be tested is qualified, otherwise it is unqualified.

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