Test platform for heat dissipation test of energy storage boosting inversion integrated cabin

Abstract

The utility model discloses a test platform for a heat dissipation test of an energy storage, boost and inversion integrated cabin, which comprises a high-voltage side rated voltage generation module, a first energy storage, boost and inversion integrated cabin and a second energy storage, boost and inversion integrated cabin, the first energy storage, boosting and inversion integrated cabin comprises a first energy storage converter, a first boosting transformer and a first high-voltage circuit breaker, and the second energy storage, boosting and inversion integrated cabin comprises a second energy storage converter, a second boosting transformer and a second high-voltage circuit breaker. After the high-voltage side rated voltage generation module provides the required high voltage for the two energy storage, boosting and inversion integrated cabins, the first energy storage, boosting and inversion integrated cabin reduces the voltage through the first boosting transformer and provides the voltage for the first energy storage converter; the second energy storage boosting inversion integrated cabin reduces the voltage through a second boosting transformer and supplies the voltage to a second energy storage converter; the DC source provides a required test DC voltage. Therefore, synchronous temperature rise experiments of the boosting transformer and the energy storage converter are realized.

Description

Technical Field

[0001] This utility model relates to the field of electrochemical energy storage technology, and in particular to a test platform for heat dissipation testing of an integrated energy storage boost inverter chamber. Background Technology

[0002] In electrochemical energy storage systems, the integrated energy storage boost-inverter compartment is a device that connects the battery system to the power grid (and / or load) to achieve bidirectional energy conversion. It mainly includes high-voltage collection lines, a step-up transformer, a low-voltage bus, an energy storage converter, and related auxiliary equipment. During the bidirectional energy conversion process in the electrochemical energy storage system, the step-up transformer, low-voltage bus, and energy storage converter in the integrated energy storage boost-inverter compartment are the main devices causing energy loss and are also the main heat sources. Therefore, heat dissipation testing of the integrated energy storage boost-inverter compartment is an important testing method to ensure the long-term stable operation of the electrochemical energy storage system.

[0003] The commonly used method for heat dissipation testing of integrated energy storage step-up inverter modules is to conduct temperature rise tests on the step-up transformer and energy storage converter of the module separately. The temperature rise test method for the step-up transformer is as follows: Figure 1 As shown, the temperature rise test is carried out by the simulated load method. The main principle is to control the output impedance voltage (the product of the rated primary voltage of the transformer and the short-circuit impedance percentage of the transformer) of the autotransformer T1 (2) and the isolation transformer T2 (3) through the transformer integrated control console (1). For a 10kV voltage level transformer, its impedance voltage generally does not exceed 800V, and for a 37kV voltage level transformer, its impedance voltage generally does not exceed 3kV) to conduct short-circuit test (load loss) and no-load test (no-load loss) on the temperature rise test transformer T3 (5). Then, according to the provisions of Clause 23.2.1 in GB 1094.11-2007, the temperature rise of the step-up transformer is calculated. The final temperature rise should meet the relevant requirements of Table 2 in GB 1094.11-2007.

[0004] The temperature rise test method for energy storage converters is as follows: Figure 2 As shown, the test method is carried out in accordance with Clause 7.4.2 of GB / T3859.1-2013; the test power supply establishes AC side voltage for energy storage converter 1 (3) and energy storage converter 2 (5) through isolation transformer T1 (1), and DC power input (4) establishes DC side voltage for energy storage converter 1 (3) and energy storage converter 2 (5). Then, energy storage converter 1 (3) is set to grid-connected operation mode, energy storage converter 2 (5) is set to off-grid operation mode, and the rectification and inversion power of the two tested energy storage converters are adjusted to the rated power operation. In this way, all rectifier bridges of energy storage converter 1 (3) and energy storage converter 2 (5) are working at rated current conditions, which meets the temperature rise test conditions of energy storage converter.

[0005] In the temperature rise test of the step-up transformer mentioned above, the simulated load method of the step-up transformer is used. Its low-voltage side cannot output a 690V voltage that matches the energy storage converter, so the energy storage converter cannot be started to carry out the temperature rise test. In other words, it is impossible to conduct the temperature rise test on both at the same time.

[0006] Therefore, a new solution is needed. Utility Model Content

[0007] The main purpose of this invention is to address the problem that existing temperature rise test platforms cannot simultaneously conduct temperature rise tests on step-up transformers and energy storage converters, and to provide a test platform for heat dissipation testing of integrated energy storage step-up inverter cabins.

[0008] To achieve the above objectives, this utility model provides a test platform for heat dissipation testing of an integrated energy storage boost inverter module, comprising a high-voltage side rated voltage generation module, a first integrated energy storage boost inverter module, and a second integrated energy storage boost inverter module. The first integrated energy storage boost inverter module includes a first energy storage converter, a first boost transformer, and a first high-voltage circuit breaker. The second integrated energy storage boost inverter module includes a second energy storage converter, a second boost transformer, and a second high-voltage circuit breaker. The high-voltage side rated voltage generation module is connected to the first terminal of the first high-voltage circuit breaker and the first terminal of the second high-voltage circuit breaker. The second terminal of the first high-voltage circuit breaker is connected to the first terminal of the first boost transformer. The second terminal of the first boost transformer is connected to the first terminal of the first energy storage converter. The second terminal of the second high-voltage circuit breaker is connected to the first terminal of the second boost transformer. The second terminal of the second boost transformer is connected to the first terminal of the second energy storage converter. The second terminals of the first and second energy storage converters are connected to a DC source.

[0009] In the test platform for heat dissipation testing of the integrated energy storage boost inverter cabin provided by this utility model, the high-voltage side rated voltage generation module includes a transformer integrated control console, a voltage regulator, a third boost transformer, and a third high-voltage circuit breaker. The first end of the transformer integrated control console is connected to the test power supply, the second end of the transformer integrated control console is connected to the first end of the voltage regulator, the second end of the voltage regulator is connected to the first end of the third boost transformer, the second end of the third boost transformer is connected to the first end of the third high-voltage circuit breaker, and the second end of the third high-voltage circuit breaker is connected to the first end of the first high-voltage circuit breaker and the first end of the second high-voltage circuit breaker.

[0010] In the test platform for heat dissipation testing of the integrated energy storage boost inverter cabin provided by this utility model, the high-voltage side rated voltage generation module includes a fourth high-voltage circuit breaker. The first end of the fourth high-voltage circuit breaker is connected to the high-voltage distribution line, and the second end of the fourth high-voltage circuit breaker is the first end of the first high-voltage circuit breaker and the first end of the second high-voltage circuit breaker.

[0011] The test platform for heat dissipation testing of an integrated energy storage boost inverter cabin provided by this utility model has the following beneficial effects: In the test platform for heat dissipation testing of an integrated energy storage boost inverter cabin provided by this utility model, a high voltage is generated by a high-voltage side rated voltage generation module, connecting the first and second integrated energy storage boost inverter cabins to ensure that the two cabins can be tested under the required high voltage conditions; after the high-voltage side rated voltage generation module provides the required high voltage to the two integrated energy storage boost inverter cabins, the first integrated energy storage boost inverter cabin converts the high voltage to a higher voltage through a first boost transformer. The high voltage is reduced to the required AC voltage and supplied to the first energy storage converter; the second energy storage boost inverter module also converts the high voltage to the required AC voltage through the second boost transformer and supplies it to the second energy storage converter; at the same time, the DC source provides the required test DC voltage and connects to the input terminals of the two energy storage converters; subsequently, the first energy storage converter is set to grid-connected operation mode and operates at rated power, while the second energy storage converter is set to off-grid follow mode and operates synchronously with the first energy storage converter; thus, the temperature rise test of the boost transformer and the energy storage converter is carried out synchronously. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0013] Figure 1 The diagram shown is a schematic of an existing temperature rise test method for step-up transformers.

[0014] Figure 2 The diagram shows the principle of the existing temperature rise test method for energy storage converters.

[0015] Figure 3 The diagram shows the schematic of the test platform for heat dissipation testing of the integrated energy storage boost inverter cabin provided by this utility model.

[0016] Figure 4 The diagram shown is a connection diagram of the test platform for heat dissipation testing of the integrated energy storage boost inverter cabin provided in the first embodiment of this utility model.

[0017] Figure 5 The diagram shows the connection of the test platform for heat dissipation testing of the integrated energy storage boost inverter cabin provided in the second embodiment of this utility model. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate typical embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0020] Figure 3 The diagram shown is a schematic representation of a test platform for heat dissipation testing of an integrated energy storage boost inverter cabin, according to an embodiment of this invention. Figure 3As shown, the test platform for heat dissipation testing of the integrated energy storage boost inverter cabin provided by this utility model includes a high-voltage side rated voltage generation module 100, a first integrated energy storage boost inverter cabin 200, and a second integrated energy storage boost inverter cabin 300. The first integrated energy storage boost inverter cabin 200 includes a first energy storage converter 210, a first boost transformer 220, and a first high-voltage circuit breaker 230. The second integrated energy storage boost inverter cabin 300 includes a second energy storage converter 310, a second boost transformer 320, and a second high-voltage circuit breaker 330. The high-voltage side rated voltage generation module 100 is connected to the first end of the first high-voltage circuit breaker 230 and the first end of the second high-voltage circuit breaker 330. The second end of the first high-voltage circuit breaker 230 is connected to the first end of the first step-up transformer 220. The second end of the first step-up transformer 220 is connected to the first end of the first energy storage converter 210. The second end of the second high-voltage circuit breaker 330 is connected to the first end of the second step-up transformer 320. The second end of the second step-up transformer 320 is connected to the first end of the second energy storage converter 310. The second ends of the first energy storage converter 210 and the second energy storage converter 310 are connected to a DC source. The first and second integrated energy storage boost inverter modules obtain the required rated voltage (e.g., 37kV) on the high-voltage side through the high-voltage side rated voltage generation module 100. Thus, in the first module, the first boost inverter provides the rated AC voltage (e.g., AC690V) to the first energy storage converter via the first boost transformer; similarly, in the second module, the second boost inverter provides the rated AC voltage (e.g., AC690V) to the second energy storage converter via the second boost transformer. Then, the required test DC voltage (e.g., DC1500V) is provided through a DC source input, setting the first energy storage converter to grid-connected operation mode and the second energy storage converter to off-grid follow-up operation mode, with the grid-connected power of the first energy storage converter set to its rated power. This ultimately enables the first and second integrated energy storage boost inverter modules to operate in parallel. The second energy storage boost inverter module operates under rated conditions, providing the rated operating conditions for its temperature rise test. During operation, the energy storage converter in the high-voltage section of the first boost inverter module flows to the low-voltage section, then from the energy storage converter in the second boost inverter module to the high-voltage section of the second boost inverter module, and then flows back to the high-voltage section of the first boost inverter module, forming a power circulation current. The high-voltage module establishes the high-voltage voltage and compensates for the losses of the entire power circulation current. The DC module establishes DC conditions to start the power circulation current. The established circulation current power can be used to test the temperature rise of the first and second boost inverter modules. Finally, the temperature of each system in the first and second energy storage boost inverter modules is monitored and recorded to achieve the purpose of heat dissipation testing of the energy storage boost inverter modules.

[0021] In this embodiment, a high-voltage voltage is generated by a high-voltage side rated voltage generation module, connecting the first and second integrated energy storage boost inverter modules to ensure that both modules can be tested under the required high-voltage conditions. After the high-voltage side rated voltage generation module provides the required high voltage (e.g., 37kV) to the two integrated energy storage boost inverter modules, the first integrated energy storage boost inverter module reduces the high voltage to 690V AC voltage through a first step-up transformer and supplies it to the first energy storage converter; the second integrated energy storage boost inverter module also converts the high voltage to 690V AC voltage through a second step-up transformer and supplies it to the second energy storage converter; simultaneously, a DC source (e.g., DC1500V) provides the required test DC voltage and connects to the input terminals of the two energy storage converters; subsequently, the first energy storage converter is set to grid-connected operation mode and operates at rated power, while the second energy storage converter is set to off-grid follow mode and operates synchronously with the first energy storage converter. During system operation, the temperature changes of the first and second integrated energy storage boost inverter modules are monitored and recorded. Heat dissipation performance is analyzed, and the thermal management capabilities of the integrated energy storage boost inverter modules under different operating conditions are evaluated. Thus, by simulating actual operating conditions, the test platform can provide the necessary conditions to evaluate the heat dissipation performance of the integrated energy storage boost inverter modules, ensuring that the system can maintain a stable temperature under high load and long-term operation, avoiding overheating or damage.

[0022] Figure 4 The diagram shows the connection of the test platform for heat dissipation testing of the integrated energy storage boost inverter cabin provided in the first embodiment of this utility model. Figure 4 In the illustrated embodiment, the high-voltage side rated voltage generation module 100 includes a transformer integrated control console 110, a voltage regulator 120, a third step-up transformer 130, and a third high-voltage circuit breaker 140. The first terminal of the transformer integrated control console 110 is connected to a test power supply. The second terminal of the transformer integrated control console 110 is connected to the first terminal of the voltage regulator 120. The second terminal of the voltage regulator 120 is connected to the first terminal of the third step-up transformer 130. The second terminal of the third step-up transformer 130 is connected to the first terminal of the third high-voltage circuit breaker 140. The second terminal of the third high-voltage circuit breaker 140 is connected to the first terminals of the first high-voltage circuit breaker 230 and the second high-voltage circuit breaker 330. In this embodiment, the transformer integrated control console controls the voltage adjustment and testing process of the entire high-voltage side system. The voltage regulator 120 is responsible for adjusting the input voltage to a suitable level to supply the step-up transformer for further voltage boosting. The third step-up transformer 130 boosts the adjusted input voltage to the required high voltage value, such as 37kV. The third high-voltage circuit breaker 140 is used to connect and disconnect the circuit to ensure safety during the testing process.

[0023] In this embodiment, a transformer integrated test bench controls the voltage regulator to provide the input voltage required by the third output step-up transformer. This third step-up transformer then provides the rated high-voltage side voltage required by the first and second integrated energy storage step-up inverter modules. The test power supply is boosted to the required high-voltage level, such as 37kV, through adjustments and settings of the autotransformer and step-up transformer. This voltage can be freely selected from any high-voltage side parameter between 6.3kV and 40.5kV by setting the boost level of the autotransformer and step-up transformer. Through the combined use of the voltage regulator and step-up transformer, the platform provides a stable and precise voltage output. This precise voltage control ensures a more detailed and accurate performance evaluation of the energy storage device under different voltage conditions. By setting different boost levels, the platform can provide multiple voltage levels to adapt to the operating requirements of the energy storage device under different conditions. Testers can select an appropriate voltage range according to the actual needs of the energy storage device, ensuring the accuracy and reliability of the test results.

[0024] Figure 5 The diagram shows the connection of the test platform for heat dissipation testing of the integrated energy storage boost inverter cabin provided in the second embodiment of this utility model. Figure 5 In the illustrated embodiment, the high-voltage side rated voltage generation module 100 includes a fourth high-voltage circuit breaker 150. The first end of the fourth high-voltage circuit breaker 150 is connected to a high-voltage distribution line, and the second end of the fourth high-voltage circuit breaker 150 is connected to the first end of the first high-voltage circuit breaker 230 and the first end of the second high-voltage circuit breaker 330. In this embodiment, a dedicated test line is directly established in the high-voltage distribution room of the plant area to the test platform. Using the rated voltage (e.g., 10kV or 37kV) provided by the high-voltage distribution room, the rated operating conditions for heat dissipation testing can also be established between the two energy storage inverter booster modules.

[0025] In this embodiment, the first terminal of the fourth high-voltage circuit breaker is connected to the high-voltage power distribution line in the plant area, directly obtaining the high-voltage power supplied by the plant. Using the rated voltage (e.g., 10kV or 37kV) provided by the plant's high-voltage distribution room, the test platform can simulate the operating conditions of the energy storage inverter booster cabin in a real-world working environment. The high-voltage distribution room typically provides a stable voltage, ensuring the performance and reliability of the equipment under actual operating voltage during the test.

[0026] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0027] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspect lies in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0028] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0029] It should be noted that the above embodiments are illustrative of the present invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A test platform for heat dissipation testing of an integrated energy storage boost inverter cabin, characterized in that, The system includes a high-voltage side rated voltage generation module (100), a first energy storage boost inverter integrated module (200), and a second energy storage boost inverter integrated module (300). The first energy storage boost inverter integrated module (200) includes a first energy storage converter (210), a first boost transformer (220), and a first high-voltage circuit breaker (230). The second energy storage boost inverter integrated module (300) includes a second energy storage converter (310), a second boost transformer (320), and a second high-voltage circuit breaker (330). The high-voltage side rated voltage generation module (100) is connected to the first terminal of the first high-voltage circuit breaker (230) and the second high-voltage circuit breaker (330). The first end of the high-voltage circuit breaker (330) is connected to the first end of the first step-up transformer (220), the second end of the first step-up transformer (220) is connected to the first end of the first energy storage converter (210), the second end of the second high-voltage circuit breaker (330) is connected to the first end of the second step-up transformer (320), the second end of the second step-up transformer (320) is connected to the first end of the second energy storage converter (310), and the second ends of the first energy storage converter (210) and the second end of the second energy storage converter (310) are connected to a DC source.

2. The test platform for heat dissipation testing of the integrated energy storage boost inverter cabin as described in claim 1, characterized in that, The high-voltage side rated voltage generation module (100) includes a transformer integrated control console (110), a voltage regulator (120), a third step-up transformer (130), and a third high-voltage circuit breaker (140). The first end of the transformer integrated control console (110) is connected to a test power supply. The second end of the transformer integrated control console (110) is connected to the first end of the voltage regulator (120). The second end of the voltage regulator (120) is connected to the first end of the third step-up transformer (130). The second end of the third step-up transformer (130) is connected to the first end of the third high-voltage circuit breaker (140). The second end of the third high-voltage circuit breaker (140) is connected to the first end of the first high-voltage circuit breaker (230) and the first end of the second high-voltage circuit breaker (330).

3. The test platform for heat dissipation testing of the integrated energy storage boost inverter cabin as described in claim 1, characterized in that, The high-voltage side rated voltage generation module (100) includes a fourth high-voltage circuit breaker (150), the first end of which is connected to a high-voltage distribution line, and the second end of which is the first end of the first high-voltage circuit breaker (230) and the first end of the second high-voltage circuit breaker (330).

Images