Inverter aging test system based on bidirectional energy feedback
Patent Information
- Application Number
- CN202522177787.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-10-15
AI Technical Summary
[0003]然而这种结构的逆变器老化测试系统在实际使用过程中存在以下几点不足之处：第一、能源浪费：老化测试过程中，90%以上电能通过功率负载柜上的功率电阻丝转化为热能损耗，功耗成本高昂；第二、散热难题：因为功率负载柜工作过程中会大量产热，大功率测试时需配套强散热系统，增加老化测试设备体积与复杂度；第三、线路过载：由于老化测试设备部件数量过多、电路复杂以及耗电量较高，易导致线路过载和过温，测试过程中存在一定的安全风险；第四、老化效率低：单次老化测试只能使用一组待测逆变器进行老化测试，老化测试效率较低
本实用新型中，本逆变器老化测试是由两组待测逆变器、一组并柜直流电源线、一组并柜交流电源线、三组三相空气断路器以及一组市电接入组成，当并柜交流电源线其中一个三相空气断路器以及市电接入上的三相空气断路器开启时，便可对其中一个待测逆变器进行充电操作，当市电接入上的三相空气断路器关闭，同时并柜交流电源线上的两个三相空气断路器同步开启时，两组待测逆变器便会串联在一起，此时充电完成后的待测逆变器便可对未充电的待测逆变器进行放电处理，两组待测逆变器便可同步进行充放电老化测试操作，这种结构可使得两组待测逆变器能够相互循环充放电来实现逆变器高效老化测试，老化电能≥85%进行了循环利用，降低了电能的浪费，同时整个老化测试过程中无其他负载加入，降低了线路过载和过温等安全风险的发生，同时单次老化测试可实现两个待测逆变器的同步老化测试操作，大大提升了逆变器老化测试的效率。
Smart Images
Figure CN224720154U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power electronic equipment testing technology, and in particular to an inverter aging test system based on bidirectional energy feedback. Background Technology
[0002] like Figure 3 As shown, this is the previous generation inverter aging test system. The mains power is connected to a single inverter under test through the parallel AC power line, which can charge the 52V / 200A battery pack inside the inverter under test. Then, a power load cabinet is connected to the output of the inverter under test to discharge the inverter under test and the 52V / 200A battery pack. The aging test operation of the inverter under test is realized by manually adjusting the connection to the mains power and the connection to the power load cabinet.
[0003] However, this type of inverter aging test system has the following shortcomings in actual use: First, energy waste: During the aging test, more than 90% of the electrical energy is converted into heat energy loss through the power resistance wire on the power load cabinet, resulting in high power consumption costs; Second, heat dissipation problems: Because the power load cabinet generates a lot of heat during operation, a strong heat dissipation system is required for high-power testing, increasing the size and complexity of the aging test equipment; Third, line overload: Due to the large number of components, complex circuits, and high power consumption of the aging test equipment, line overload and overheating are likely to occur, posing certain safety risks during the test; Fourth, low aging efficiency: Only one set of inverters under test can be used for aging test in a single aging test, resulting in low aging test efficiency.
[0004] Therefore, it is particularly important to design and manufacture an inverter aging test system that can reduce energy waste and improve the safety and efficiency of inverter aging tests, and apply it in the actual aging test process of inverters. Utility Model Content
[0005] The purpose of this invention is to address the aforementioned technical deficiencies in the previous generation inverter aging test system in actual aging tests, and to propose an inverter aging test system based on bidirectional energy feedback.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: The inverter aging test system based on bidirectional energy feedback includes an inverter under test (DUT), mains power input, a 52V / 200A battery pack, a battery communication board, and an IoT communication module. Two sets of DUTs are configured, each containing an internal bidirectional DC / DC module and an internal bidirectional AC / DC module. The output of the internal bidirectional DC / DC module is electrically connected to the input of the internal bidirectional AC / DC module. The input of the internal bidirectional DC / DC module is equipped with an interface and a BAT interface, while the output of the internal bidirectional AC / DC module is equipped with a GRID interface and an AC / DC interface. The OUT interface connects the two sets of inverters under test via a parallel DC power supply line, and the GRID interface connects the two sets of inverters under test via a parallel AC power supply line. The output terminal of the AC power input is electrically connected to the input terminal of the parallel AC power supply line. The output terminal of the 52V / 200A battery pack is electrically connected to the input terminal of the BAT interface of the two sets of inverters under test. The output terminal of the battery communication board is electrically connected to the input terminal of the 52V / 200A battery pack. The output terminal of the IoT communication module is electrically connected to both the battery communication board and the input terminal of the inverter under test.
[0007] As a further description of the above technical solution: A three-phase air circuit breaker is installed between the two ends of the parallel AC power line and the GRID interface, as well as between the mains power input and the parallel AC power line.
[0008] As a further description of the above technical solution: The output end of the IoT communication module is equipped with a 4G module and a WIFI module for wireless transmission of test data.
[0009] The aging test method for inverters based on bidirectional energy feedback includes the following steps: S100. Preparation: Take the DC power supply cable of the parallel cabinet and connect it to the interface of the two inverters under test. Ensure that the three three-phase air circuit breakers are in the closed state. Then connect the AC power supply cable of the parallel cabinet to the GRID interface of the two inverters under test. The operator can then configure the two sets of inverters under test on site to determine whether the equipment configuration is online. When the equipment configuration is online, the next step can be carried out. If the equipment configuration is offline, continue to configure the inverters under test until the equipment configuration is online. S200, Aging Parameter Adjustment: The operator uses the battery communication board to set up the load test for the inverter under test, adjust the initial parameters, track the energy feedback curve, automatically adapt the power, load the aging cycle, and track anomalies, etc., to ensure that the entire aging test process can be carried out stably before proceeding to the next step. S300 Cyclic Charge-Discharge Test: The operator opens the three-phase air circuit breaker connected between the mains power input and the parallel AC power line to ensure that the mains power can be connected to the parallel AC power line. Then, the operator randomly opens one of the three-phase air circuit breakers on the parallel AC power line to charge the 52V / 200A battery pack of one of the inverters under test. After charging for a period of time, the operator closes the three-phase air circuit breaker between the mains power input and the parallel AC power line. Then, the two three-phase air circuit breakers on the parallel AC power line are opened simultaneously. At this time, the inverter under test that has been charged can discharge the uncharged inverter under test. After discharging for a period of time, the above operation is repeated to achieve the cyclic charge-discharge aging test between the two sets of inverters under test. S400 Test Result Output: During the entire cycle charge-discharge test, the operator can obtain aging test data of the inverter under test and the 52V / 200A battery pack on-site by observing the controller and battery communication board of the inverter under test. At the same time, the IoT communication module can collect aging test data of the two sets of inverters under test and the 52V / 200A battery pack in real time, and wirelessly transmit it to the remote control terminal via the 4G module and WIFI module. If the entire aging test process is normal and the equipment configuration is normal and online, an aging report is generated according to the parameter adjustment content in step S200, so that the tester can understand the aging test status of the inverter under test. If the aging test process is abnormal and the equipment configuration is offline, the abnormal aging test data is directly recorded and wirelessly transmitted to the remote control terminal for recording and analysis.
[0010] As a further description of the above technical solution: In step S300, the charging and discharging times are both set to 30 minutes.
[0011] As a further description of the above technical solution: In step S300, during the entire cyclic charge-discharge aging test process, the two inverters under test repeatedly perform DC-DC conversion, AC-DC conversion, and DC-AC conversion operations through the internal bidirectional DC / / DC module and the internal bidirectional AC / / DC module of the inverter.
[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: In this invention, the inverter aging test consists of two sets of inverters under test, one set of parallel DC power lines, one set of parallel AC power lines, three sets of three-phase air circuit breakers, and one set of mains power connection. When one of the three-phase air circuit breakers on the parallel AC power line and the three-phase air circuit breaker on the mains power connection are opened, one of the inverters under test can be charged. When the three-phase air circuit breaker on the mains power connection is closed, and the two three-phase air circuit breakers on the parallel AC power line are opened simultaneously, the two sets of inverters under test are connected in series. At this time, the inverters under test are fully charged. The test inverter can discharge the uncharged inverter under test, and the two sets of inverters under test can be charged and discharged synchronously for aging tests. This structure allows the two sets of inverters under test to cycle charge and discharge each other to achieve efficient aging tests. ≥85% of the aging energy is recycled, reducing energy waste. At the same time, no other load is added during the entire aging test, reducing the occurrence of safety risks such as line overload and overtemperature. In addition, a single aging test can realize the synchronous aging test operation of two inverters under test, which greatly improves the efficiency of inverter aging tests. Attached Figure Description
[0013] Figure 1 This is a system architecture diagram of the inverter aging test system based on bidirectional energy feedback proposed in this utility model; Figure 2 This is a flowchart illustrating the workflow of the inverter aging test method based on bidirectional energy feedback in this utility model. Figure 3 This is a system architecture diagram of the previous generation inverter aging test system in the existing technology.
[0014] Legend: 1. Inverter under test; 2. DC power supply cable for parallel cabinet; 3. Inverter internal bidirectional DC / DC module; 4. Inverter internal bidirectional AC / DC module; 5. Three-phase air circuit breaker; 6. Mains power connection; 7. 52V / 200A battery pack for testing; 8. Battery communication board; 9. IoT communication module; 10. AC power supply cable for parallel cabinet. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0016] Please see Figure 1-3This utility model provides a technical solution: an inverter aging test system based on bidirectional energy feedback, including an inverter under test 1, a mains power input 6, a 52V / 200A battery pack 7, a battery communication board 8, and an IoT communication module 9. The inverter under test 1 is configured with two sets, each set containing an internal bidirectional DC / DC module 3 and an internal bidirectional AC / DC module 4. The output of the internal bidirectional DC / DC module 3 is electrically connected to the input of the internal bidirectional AC / DC module 4. The input of the internal bidirectional DC / DC module 3 is equipped with an interface and a BAT interface. The output of module C4 is equipped with a GRID interface and an ACOUT interface. The interface of the two sets of inverters under test 1 is electrically connected through the parallel cabinet DC power line 2. The GRID interface of the two sets of inverters under test 1 is electrically connected through the parallel cabinet AC power line 10. The output of the mains power input 6 is electrically connected to the input of the parallel cabinet AC power line 10. The output of the 52V / 200A battery pack 7 is electrically connected to the input of the BAT interface of the two sets of inverters under test 1. The output of the battery communication board 8 is electrically connected to the input of the 52V / 200A battery pack 7. The output of the IoT communication module 9 is electrically connected to the input of the battery communication board 8 and the inverters under test 1 respectively.
[0017] Specifically, such as Figure 1 As shown, a three-phase air circuit breaker 5 is installed between the two ends of the parallel AC power line 10 and the GRID interface, and between the mains power input 6 and the parallel AC power line 10. The three-phase air circuit breaker 5 installed between the mains power input 6 and the parallel AC power line 10 can control whether the mains power is connected to the parallel AC power line 10, realizing the power supply control operation of the parallel AC power line 10. The three-phase air circuit breaker 5 installed between the two ends of the parallel AC power line 10 and the GRID interface can control the parallel AC power line 10 to establish a charging connection with one of the sets of inverters under test 1. When the two three-phase air circuit breakers 5 on the parallel AC power line 10 are opened simultaneously, the two sets of inverters under test 1 can establish a series connection. After the inverter under test 1 is charged, it can discharge the uncharged inverter under test 1, thereby realizing the synchronous charging and discharging operation of the two sets of inverters under test 1.
[0018] Specifically, such as Figure 1As shown, the output end of the IoT communication module 9 is equipped with a 4G module and a WIFI module for wireless transmission of test data. The IoT communication module 9 can wirelessly transmit the test data of the aging test equipment to the remote control terminal in real time through the 4G module and the WIFI module, so that the test personnel of the remote control terminal can understand various operating parameters of the inverter under test 1, including load test settings, initialization parameter adjustment, energy feedback curve tracking, automatic power adaptation, load aging cycle and anomaly tracking data.
[0019] Specifically, such as Figure 1 and Figure 2 As shown, based on the above-mentioned bidirectional energy feedback inverter aging test system, the following aging test method is formed, including the following steps: Step 1: Preparation: Take the parallel cabinet DC power cable 2 and connect it to the interface of the two inverters under test 1. Ensure that the three three-phase air circuit breakers 5 are in the closed state. Then connect the parallel cabinet AC power cable 10 to the GRID interface of the two inverters under test 1. The operator can then configure the two sets of inverters under test 1 on site to determine whether the equipment configuration is online. When the equipment configuration is online, the next step can be carried out. If the equipment configuration is offline, continue to configure the inverters under test 1 until the equipment configuration is online. Step 2, Aging Parameter Adjustment: The operator sets up the load test of the inverter under test 1 through the battery communication board 8, adjusts the initial parameters, tracks the energy feedback curve, automatically adapts the power, loads the aging cycle, and tracks abnormalities, etc., to ensure that the entire aging test process can be carried out stably before proceeding to the next step. Step 3, Cyclic Charge-Discharge Test: The operator opens the three-phase air circuit breaker 5 connecting the mains power input 6 and the parallel AC power line 10 to ensure mains power can be connected to the parallel AC power line 10. Then, the operator randomly opens the three-phase air circuit breaker 5 on one of the parallel AC power lines 10 to charge the 52V / 200A battery pack 7 of one of the inverters under test 1. After charging for 30 minutes, the operator closes the three-phase air circuit breaker 5 connecting the mains power input 6 and the parallel AC power line 10, and then charges the battery pack 7 on the parallel AC power line 10. Two three-phase air circuit breakers 5 are opened simultaneously. At this time, the inverter under test 1 that has been charged can discharge the uncharged inverter under test 1. After discharging for 30 minutes, the two inverters under test 1 repeatedly perform DC-DC conversion, AC-DC conversion and DC-AC conversion operations through the internal bidirectional DC / DC module 3 and the internal bidirectional AC / DC module 4 of the inverter. The above operations are repeated to realize the cyclic charge-discharge aging test between the two sets of inverters under test 1. The final step, test result output: Throughout the entire cyclic charge-discharge test, the operator can obtain aging test data for both the inverter under test (UDT) and the 52V / 200A battery pack (BAB) by observing the controller of the UDT 1 and the battery communication board 8 on-site. Simultaneously, the IoT communication module 9 can collect aging test data for both UDTs and the 52V / 200A battery pack (BAB) in real time and wirelessly transmit it to the remote control terminal via 4G and WIFI modules. If the entire aging test process is normal and the equipment is configured to be online, an aging report is generated according to the parameter adjustments in the second step, allowing the tester to understand the aging test status of the UDT. If the aging test process is abnormal and the equipment is offline, the abnormal aging test data is directly recorded and wirelessly transmitted to the remote control terminal for recording and analysis, thus completing the synchronous cyclic charge-discharge aging test operation for both UDTs.
[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. An inverter aging test system based on bidirectional energy feedback, comprising an inverter under test (1), mains power input (6), a 52V / 200A battery pack (7), a battery communication board (8), and an IoT communication module (9), characterized in that, The inverter under test (1) is provided in two sets. Each set of the inverter under test (1) is equipped with an internal bidirectional DC / / DC module (3) and an internal bidirectional AC / / DC module (4). The output terminal of the internal bidirectional DC / / DC module (3) is electrically connected to the input terminal of the internal bidirectional AC / / DC module (4). The input terminal of the internal bidirectional DC / / DC module (3) is provided with an interface and a BAT interface. The output terminal of the internal bidirectional AC / / DC module (4) is provided with a GRID interface and an AC interface. The OUT interface is electrically connected between the interface interfaces of the two sets of inverters under test (1) through the parallel cabinet DC power line (2), and the GRID interface of the two sets of inverters under test (1) is electrically connected through the parallel cabinet AC power line (10). The output terminal of the mains power access (6) is electrically connected to the input terminal of the parallel cabinet AC power line (10). The output terminal of the test 52V / 200A battery pack (7) is electrically connected to the input terminal of the BAT interface of the two sets of inverters under test (1). The output terminal of the battery communication board (8) is electrically connected to the input terminal of the test 52V / 200A battery pack (7). The output terminal of the IOT Internet of Things communication module (9) is electrically connected to the input terminals of the battery communication board (8) and the inverters under test (1) respectively.
2. The inverter aging test system based on bidirectional energy feedback according to claim 1, characterized in that, A three-phase air circuit breaker (5) is installed between the two ends of the parallel AC power line (10) and the GRID interface, as well as between the mains power access (6) and the parallel AC power line (10).
3. The inverter aging test system based on bidirectional energy feedback according to claim 1, characterized in that, The output end of the IoT communication module (9) is equipped with a 4G module and a WIFI module for wireless transmission of test data.