Liftable inverter temperature rise testing device in high-irradiation environment
By designing a liftable and lowered inverter temperature rise test device, using components such as dimmable lighting simulator and data acquisition instrument, the shortcomings of photovoltaic grid-connected inverters in high-irradiation environments are solved, and accurate temperature rise monitoring and safety improvement are achieved.
Patent Information
- Application Number
- CN202422302885.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing photovoltaic grid-connected inverter temperature rise test devices have shortcomings in simulating high-irradiation environments, and it is difficult to accurately test their temperature rise in different usage environments, resulting in damage to components or safety hazards.
Design an inverter temperature rise test device in liftable and high irradiation environment, and use components such as dimmable lighting simulator, liftable mobile vehicle and data collector to simulate the actual environment of photovoltaic grid-connected inverters under different lighting conditions, and monitor and record temperature changes in real time.
Accurate temperature rise test of photovoltaic grid-connected inverters at multiple angles, different altitudes and light intensity is realized to ensure that they work safely in harsh environments, reduce heat dissipation needs, and reduce manufacturer costs.
Smart Images
Figure CN223180330U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an inverter temperature rise test device under a liftable and high-irradiation environment. An inverter temperature rise test device under a liftable and high-irradiation environment is constituted by one or more adjustable light simulators, a liftable mobile cart, a bracket, a sample hanging board, a data collector, a total solar irradiance meter, a DC power supply (photovoltaic array simulator) and an AC power supply. Background Art
[0002] The composition of distributed power generation systems is diverse, including distributed wind power, distributed photovoltaic, gas turbines, and geothermal power generation, etc. With the rapid development of the development and application of photovoltaic power generation, the proportion of photovoltaic power generation in distributed power generation systems is gradually increasing. Therefore, the quality and safety issues of photovoltaic-related products have attracted much attention. In addition, most photovoltaic power stations are built in places with high light intensity and long light time, such as rooftops, mountain tops, and deserts. During high-intensity and long-time operation, various power products will generate a large degree of temperature rise. Especially for photovoltaic grid-connected inverters, excessive temperature will cause damage, short circuit, and even fire to their internal components. Therefore, it is necessary to conduct type tests on their temperature rise conditions. On the one hand, it is ensured that their heat dissipation capacity can meet the standards and they can work safely under the most severe use environments to prevent excessive temperature rise. On the other hand, if the product has a low temperature rise, the heat dissipation space can be appropriately reduced to save the costs of manufacturers. Therefore, there is an urgent need for an inverter temperature rise test device under a high-irradiation environment. Summary of the Invention
[0003] Aiming at the blank of the existing temperature rise test of photovoltaic grid-connected inverters in the test device and the deficiencies in aspects such as simulating the light environment, the utility model provides an inverter temperature rise test device under a liftable and high-irradiation environment. By using one or more adjustable light simulator devices, photovoltaic grid-connected inverters with various powers and sizes are irradiated at various positions, multi-angles, different heights, and light intensities to simulate the real light conditions under different use environments. At the same time, a data collection device is used to monitor and record the temperature changes of the products in real time.
[0004] The utility model designs a temperature rise test device for an inverter under a high-irradiance environment with adjustable height, comprising a DC power supply, an AC power supply, a solar total radiation meter, and a data collector. It is characterized in that there is a movable vehicle with adjustable height, on the upper top of which there is an annular track, on which at least one movable bracket is arranged. An adjustable light simulator is installed on the movable bracket. A sample hanging plate is placed on the bottom plate of the movable vehicle with adjustable height, and a to-be-tested inverter is placed on the sample hanging plate. A pulley is installed at the bottom of the movable bracket and is embedded in the annular track. The upper part of the movable bracket is bent, and several slots for installing the adjustable light simulator are arranged on the bent part. A bracket is arranged at the bottom of the sample hanging plate, and a movable runner is installed on the bracket. The solar total radiation meter is placed on the bottom plate of the movable vehicle with adjustable height. The DC power supply is connected to the input end of the to-be-tested inverter, and the output end of the to-be-tested inverter is connected to the AC power supply. The data collector is connected to a plurality of thermocouples arranged on the to-be-tested inverter.
[0005] The main advantages of the utility model are as follows: The height of the movable vehicle with adjustable height is adjustable and can be moved to platforms with different capacities for light tests. The top of the vehicle adopts a circular track, and the adjustable light simulator device is connected to the track through a bracket and can rotate 360° along the track. The adjustable light simulator can also adjust the height and depression angle on the bracket. The photovoltaic inverter can adjust its orientation on the sample hanging plate and can rotate 360° along with the sample hanging plate. The photovoltaic grid-connected inverter with various powers and sizes is irradiated at various positions, at multiple angles, at different heights, and under different light intensities to simulate the real light conditions under different usage environments. At the same time, a data collection device is used to monitor and record the temperature changes of each key component of the product in real time. Description of the Drawings
[0006] Figure 1 It is a schematic structural diagram of the device of the utility model.
[0007] Figure 2 It is a schematic structural diagram of the movable bracket of the utility model. Detailed Implementation Modes
[0008] In the figure, there is a temperature rise test device for an inverter under an environment with adjustable height and high irradiation, which includes a DC power supply 1, an AC power supply 2, a total solar radiation meter 3, a data acquisition instrument 4, and a to-be-tested inverter 5. It is characterized in that there is a movable vehicle 6 with adjustable height, which is provided with wheels 15 at the bottom for easy movement during detection. The annular track part on its upper part can be lifted (the lifting device adopts a common screw-nut structure and is driven by a motor to drive the screw). There is an annular track 7 arranged on the top of the movable vehicle with adjustable height. At least one movable bracket 8 is arranged on the annular track. An adjustable light simulator 9 is installed on the movable bracket. A sample hanging board 10 is placed on the bottom plate of the movable vehicle with adjustable height. The to-be-tested inverter is placed on the sample hanging board. The bottom of the movable bracket is installed with pulleys 11, and the pulleys are embedded in the annular track. The upper part of the movable bracket is bent, and a number of slots 12 for installing the adjustable light simulator are arranged on the bent part. A bracket 13 is arranged at the bottom of the sample hanging board, and a movable wheel 14 is installed on the bracket. The total solar radiation meter can freely move to the position where the required light intensity needs to be measured inside the movable vehicle 6 with adjustable height. The DC power supply is connected to the input end of the to-be-tested inverter, and the output end of the to-be-tested inverter is connected to the AC power supply. The data acquisition instrument is connected to a number of thermocouples (not shown in the figure) placed on the to-be-tested inverter.
[0009] During the test, first fix the test inverter on the sample hanging board, then connect the thermocouples arranged on the inverter to the data acquisition instrument, turn on the data acquisition instrument, and observe whether the temperatures of the thermocouples are normal; then connect the DC side of the to-be-tested inverter to the DC power supply (photovoltaic array simulator) as the energy input of the photovoltaic inverter to simulate the photovoltaic cell characteristics of the photovoltaic inverter; and connect the AC side of the test inverter to the AC power supply (simulated power grid) as the energy output of the photovoltaic inverter to simulate the grid-connected characteristics of the photovoltaic inverter.
[0010] After the main inverter circuit is connected, turn on the adjustable light simulator and the total solar radiation meter. According to requirements, place the total solar radiation meter at different parts of the inverter, and adjust the height, position, and angle of the light simulator until the light intensity at each part of the inverter meets the requirements. Finally, energize the main inverter circuit to make the test inverter work normally under the condition of rated full load, and use the data acquisition instrument to monitor and record the temperature changes of each component of the inverter.
[0011] This device can be tested by multiple adjustable light simulators. The adjustable light simulator has a wide range of light intensity, can realize simultaneous irradiation of multiple light sources, and provides stable adjustable light in all directions, at multiple angles, and with different heights and intensities; there are sufficient thermocouple layout points, and the temperature changes of each key component of the product are monitored and recorded in real time through the data acquisition instrument; the light output is stable, and the temperature changes of each key component of the photovoltaic grid-connected inverter are measured under a situation closer to the real light environment.
[0012] The adjustable light simulator is fixed on the annular track at the top of the liftable mobile vehicle through a bracket. The pulley at the bottom of the bracket enables the adjustable light simulator to rotate 360° along the circular track. The adjustable light simulator can also adjust its height and angle along the bracket. The adjustable light simulator can provide the light intensity required by various test standards, allowing the product under test to conduct a temperature rise test under conditions extremely close to outdoor lighting, and the light intensity can also be adjusted at any time during the test. The liftable mobile vehicle can be electrically raised and lowered to meet the test requirements of inverters of various sizes, and can also be freely moved to the test platforms of inverters with different powers to meet the test requirements of inverters with different powers. There are five-position height slots on the bracket, and the adjustable light simulator can be placed in the slots at different heights according to the test needs, thereby changing the height of the adjustable light simulator. In addition, the axis of the adjustable light simulator in the slot can rotate freely along the axis to adjust the angle of the adjustable light simulator. The photovoltaic inverter is hung on the sample hanging board through its own backplane. The upper part of the sample hanging board is designed as a grid to facilitate the adjustment of the position of the photovoltaic inverter. The bottom is equipped with pulleys, and the sample can be moved or rotated to the appropriate position and then fixed. The pyranometer can be placed at different parts of the product to measure whether the light intensity meets the requirements. The data acquisition instrument can, through the thermocouples arranged on the product, observe the temperature changes of each key component of the product in real time and store the temperature data in real time for viewing.
Claims
1. An inverter temperature rise test device under an environment of liftable and high irradiation, comprising a DC power supply, an AC power supply, a total solar radiation meter, and a data collector, characterized in that, There is a liftable mobile vehicle. An annular track is provided on the upper top of the liftable mobile vehicle. At least one movable bracket is provided on the annular track. An adjustable light simulator is installed on the movable bracket. A sample hanging plate is placed on the bottom plate of the liftable mobile vehicle. A tested inverter is placed on the sample hanging plate.
2. The inverter temperature rise test device capable of lifting and operating in a high-irradiation environment according to claim 1, wherein A pulley is installed at the bottom of the movable bracket. The pulley is embedded in the annular track. The upper part of the movable bracket is bent, and several slots for installing the adjustable light simulator are provided in the bent part.
3. The inverter temperature rise test device capable of lifting and operating in a high-irradiation environment according to claim 1, wherein A bracket is provided at the bottom of the sample hanging plate, and a moving runner is installed on the bracket.
4. The temperature rise test device for an inverter under a high-irradiation environment with liftable function as claimed in claim 1, wherein The total solar radiation meter can be freely moved to the position where the required light intensity is to be measured.
5. The temperature rise test device for an inverter under a high irradiation environment that can be lifted, as described in claim 1, is characterized in that The DC power supply is connected to the input end of the tested inverter, and the output end of the tested inverter is connected to the AC power supply.
6. The temperature rise test device for an inverter under a high irradiation environment with liftable function as claimed in claim 1, wherein, The data collector is connected to a number of thermocouples placed on the tested inverter.