Energy storage PCS arcing test system

Abstract

The invention provides an energy storage PCS arcing test system. The energy storage PCS arcing test system comprises a cabinet body and a panel arranged on the cabinet body. The positive electrode arcing interface unit, the negative electrode arcing interface unit and the battery arcing interface unit are electrically connected with the PCS arcing testing device, and the positive electrode arcing interface unit, the negative electrode arcing interface unit and the battery arcing interface unit are arranged on the panel; a decoupling circuit testing device, a first interface unit and a second interface unit, the decoupling circuit testing device is located in the cabinet body, and the first interface unit and the second interface unit are arranged on the panel; and the arc discharge generation part is used for generating an arc, and the positive electrode arc discharge interface unit, the negative electrode arc discharge interface unit and the battery arc discharge interface unit share the arc discharge generation part. According to the energy storage PCS arcing test system of the technical scheme of the invention, components for detecting positive arcing, negative arcing and battery pack arcing are reasonably arranged, and detection requirements of different scenes can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage PCS, and in particular to an energy storage PCS arc testing system. Background Art

[0002] In the integration and application of clean energy systems, the power conversion system (PCS) and energy storage system are core components, and their operational safety and reliability are directly related to the stability and safety of the entire energy system. Arc faults, also known as arcing, are common safety hazards in power systems. Especially in the grid-connected operation of PCS and energy storage systems, improper electrical connections or equipment failures may cause arcs, which will not only damage the equipment itself, but may also cause serious accidents such as fire and electric shock, posing a great threat to the safety of personnel and property.

[0003] In recent years, in order to improve the detection process of energy storage PCS and ensure its grid connection, safe use and protection performance, research has begun on energy storage and PCS grid connection test platforms. However, in the prior art, the methods, systems and functions of the detection platform are generally introduced, such as patents CN117578726A and CN112363070A, etc., and no patent specifically describes the overall structural layout of the detection platform. In addition, the detection platforms of energy storage products and PCS products in the above patents and related papers, as well as the control methods and protection for arcing circuits, do not reflect what specific detection structure is used to layout the device to detect energy storage PCS in terms of arcing. Summary of the invention

[0004] The main purpose of the present invention is to provide an energy storage PCS arc testing system. The above-mentioned energy storage PCS arc testing system has rationally arranged the components for detecting positive pole arcing, negative pole arcing and battery pack arcing, which can adapt to the detection requirements of different scenarios.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an energy storage PCS arc test system, comprising: a cabinet, comprising a cabinet body and a panel arranged on the cabinet body; a PCS arc detection unit, comprising a PCS arc test device and a positive arc interface unit, a negative arc interface unit and a battery arc interface unit, all of which are electrically connected to the PCS arc test device, the PCS arc test device is installed in the cabinet body, and the positive arc interface unit, the negative arc interface unit and the battery arc interface unit are arranged on the panel; a decoupling circuit detection unit, comprising a decoupling circuit test device, a first interface unit and a second interface unit, the PCS arc test device, the decoupling circuit test device and the second interface unit are all electrically connected to the first interface unit, the decoupling circuit test device is located in the cabinet body, and the first interface unit and the second interface unit are arranged on the panel; an arc generating unit, used for generating an arc, the positive arc interface unit, the negative arc interface unit and the battery arc interface unit share the arc generating unit, so that the energy storage PCS arc test system has at least a positive arc detection mode, a negative arc detection mode and a battery pack arc detection mode.

[0006] Furthermore, the arc generating unit comprises: a discharge switch which can be opened and closed and is arranged on a panel; two conductors which are arranged in a cabinet at intervals and a circuit formed by the two conductors is arranged in parallel with the discharge switch.

[0007] Furthermore, an observation window is provided on the cabinet, and the observation window is arranged corresponding to the two conductors.

[0008] Further, the positive arcing interface unit includes a BAT positive terminal for positive arcing, a BAT negative terminal for positive arcing, a DC positive terminal for positive arcing, and a DC negative terminal for positive arcing, the BAT negative terminal for positive arcing and the DC negative terminal for positive arcing are short-circuited by a wire, and the BAT positive terminal for positive arcing and the DC positive terminal for positive arcing are electrically connected through an arc generating part; or, the negative arcing interface unit includes a BAT positive terminal for negative arcing, a BAT negative terminal for negative arcing, a DC positive terminal for negative arcing, and a DC negative terminal for negative arcing, the BAT positive terminal for negative arcing and the DC positive terminal for negative arcing are short-circuited by a wire, and the BAT positive terminal for positive arcing and the DC positive terminal for positive arcing are electrically connected through an arc generating part. The wire is short-circuited, and the negative terminal of the BAT for negative arcing and the negative terminal of the DC for negative arcing are electrically connected through the arc generating part; or, the battery arcing interface unit includes a BAT positive terminal for battery arcing, a BAT negative terminal for battery arcing, a DC positive terminal for battery arcing, a DC negative terminal for battery arcing, a battery positive terminal for battery arcing and a battery negative terminal for battery arcing, the BAT positive terminal for battery arcing and the DC positive terminal for battery arcing are short-circuited through a wire, the BAT negative terminal for battery arcing and the DC negative terminal for battery arcing are short-circuited through a wire, and the battery positive terminal for battery arcing and the battery negative terminal for battery arcing are electrically connected through the arc generating part.

[0009] Furthermore, the energy storage PCS arc test system also includes a photovoltaic arc test device located in the cabinet, the photovoltaic arc test device is electrically connected to the first interface unit, and the arc generating unit is electrically connected to the second interface unit, so that the energy storage PCS arc test system also has a photovoltaic arc detection mode.

[0010] Furthermore, the decoupling circuit testing device includes a resistor and a PCB device electrically connected to the resistor; the energy storage PCS arc testing system also includes a fixed beam and a mounting member arranged in the cabinet, the mounting member is located on one side of the fixed beam, the PCB device is installed on the fixed beam, and the resistor is installed on the side of the mounting member facing the fixed beam.

[0011] Furthermore, the mounting member is a mounting plate, and the decoupling circuit testing device includes a plurality of resistors, each resistor is vertically arranged on the mounting plate, and the plurality of resistors are spaced apart.

[0012] Furthermore, the decoupling circuit test device is located below the PCS arc test device and the arc generating part.

[0013] Furthermore, a heat dissipation area is provided on the cabinet, and a heat dissipation area is provided on at least one side of the decoupling circuit testing device.

[0014] Furthermore, an air inlet channel is provided on the bottom wall of the cabinet, and an air outlet channel is provided on the top wall of the cabinet, and the air inlet channel and the air outlet channel are connected through the interior of the cabinet.

[0015] Furthermore, the panel has a PCS switch fixed area, a photovoltaic arc control area, a decoupling circuit control area, a PCS arc control area and an AC input and output area, wherein the discharge switch of the arc generating part is located in the PCS switch fixed area, the photovoltaic arc control area is provided with a photovoltaic arc discharge switch, the first interface unit is located in the decoupling circuit control area, the second interface unit, the positive arc interface unit, the negative arc interface unit and the battery arc interface unit are all located in the PCS arc control area, and the AC input and output area is provided with an AC output socket and an AC power supply port.

[0016] By applying the technical solution of the present invention, by reasonably arranging key components such as the PCS arc detection unit, the decoupling circuit detection unit and the arc generation unit in the cabinet and on the panel, the components in the test system for detecting positive arcing, negative arcing and battery pack arcing can be reasonably arranged, and the cabinet can be directly moved to different scenarios. By directly connecting the external system to be detected (such as the energy storage PCS system) to the panel, it can adapt to the detection requirements of different scenarios; and the energy storage PCS arc test system has the detection functions of positive arcing, negative arcing and battery pack arcing, which can cover a variety of arc fault types that may be encountered by PCS and energy storage systems. The diversity of detection modes can adapt to the detection requirements of different scenarios to ensure that the system can comprehensively evaluate the arc protection performance of PCS and energy storage systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of an embodiment of an energy storage PCS arc test system of the present invention is shown;

[0019] Figure 2 Shows Figure 1 The rear view of the energy storage PCS arc test system;

[0020] Figure 3 Shows Figure 2 Schematic diagram of the internal structure of the energy storage PCS arc test system;

[0021] Figure 4 Shows Figure 1 The left view of the energy storage PCS arc test system;

[0022] Figure 5 Shows Figure 4 Schematic diagram of the internal structure of the energy storage PCS arc test system;

[0023] Figure 6 Shows Figure 1 Bottom view of the energy storage PCS arc test system;

[0024] Figure 7 Shows Figure 1 The main circuit schematic diagram of the energy storage PCS arc test system.

[0025] The above drawings include the following reference numerals:

[0026] 2. Inspection port; 3. Photovoltaic arc command switch; 4. Photovoltaic arc RS485 communication interface; 5. Photovoltaic arc operation indication; 7. PCS arc operation indication; 8. PCS arc stop indication; 11. Cabinet; 12. Panel; 13. Observation window; 14. Air inlet channel; 15. Air outlet channel; 16. PCS system arc RS485 communication command interface; 21. Positive arc interface unit; 211. Positive arc BAT positive electrode Terminal; 212, BAT negative terminal for positive arc; 213, DC positive terminal for positive arc; 214, DC negative terminal for positive arc; 22, negative arc interface unit; 221, BAT positive terminal for negative arc; 222, BAT negative terminal for negative arc; 223, DC positive terminal for negative arc; 224, DC negative terminal for negative arc; 23, battery arc interface unit; 231, BAT for battery arc Positive terminal; 232, BAT negative terminal for battery arcing; 233, DC positive terminal for battery arcing; 234, DC negative terminal for battery arcing; 235, battery positive terminal for battery arcing; 236, battery negative terminal for battery arcing; 26, PCS arcing test device; 27, cabinet grounding installation area; 28, sheet metal buckle; 29, safety protection plate; 31, decoupling circuit test device; 311, resistor; 312, PCB device; 32, first interface unit; 33, second interface unit; 34, fixed beam; 35, mounting part; 37, external wire entry hole; 39, movable caster; 40, arc generating part; 41, discharge switch; 42, conductor; 43, first bracket; 51, photovoltaic arcing test device; 52, heat dissipation area; 53, photovoltaic arc discharge switch; 54, AC output socket; 55, AC power supply port; 56, second bracket; 57, third bracket. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] like Figure 1 and Figure 3As shown, an embodiment of the present invention provides an energy storage PCS arc test system. The energy storage PCS arc test system includes: a cabinet, including a cabinet body 11 and a panel 12 arranged on the cabinet body 11; a PCS arc detection unit, including a PCS arc test device 26 and a positive arc interface unit 21, a negative arc interface unit 22 and a battery arc interface unit 23, which are all electrically connected to the PCS arc test device 26, the PCS arc test device 26 is installed in the cabinet body 11, and the positive arc interface unit 21, the negative arc interface unit 22 and the battery arc interface unit 23 are arranged on the panel 12; a decoupling circuit detection unit, including a decoupling circuit test device 31, a first interface unit 3 2 and the second interface unit 33, the PCS arc test device 26, the decoupling circuit test device 31 and the second interface unit 33 are all electrically connected to the first interface unit 32, the decoupling circuit test device 31 is located in the cabinet 11, and the first interface unit 32 and the second interface unit 33 are arranged on the panel 12; an arc generating unit 40 is used to generate an arc, and the positive arc interface unit 21, the negative arc interface unit 22 and the battery arc interface unit 23 share the arc generating unit 40, so that the energy storage PCS arc test system has at least a positive arc detection mode, a negative arc detection mode and a battery pack arc detection mode.

[0029] In the above technical scheme, by reasonably arranging key components such as the PCS arc detection unit, the decoupling circuit detection unit and the arc generating unit 40 in the cabinet and on the panel 12, the components for detecting positive arc, negative arc and battery pack arc in the test system can be reasonably arranged, and the cabinet can be directly moved to different scenes. By directly connecting the external system to be detected (such as the energy storage PCS system) to the panel 12, it can adapt to the detection requirements of different scenes; and the energy storage PCS arc test system has the detection functions of positive arc, negative arc and battery pack arc, which can cover a variety of arc fault types that may be encountered by PCS and energy storage systems. The diversity of detection modes can adapt to the detection requirements of different scenes to ensure that the system can comprehensively evaluate the arc protection performance of PCS and energy storage systems.

[0030] Furthermore, the positive arc interface unit 21, the negative arc interface unit 22 and the battery arc interface unit 23 share the arc generating unit 40, so that repeated provision of the arc generating unit 40 can be avoided, thereby helping to reduce system costs.

[0031] Furthermore, the multiple interface units provided on the panel 12 facilitate the operator to quickly switch between different test modes, thereby simplifying the test process.

[0032] Furthermore, the system is not only applicable to arc testing of PCS, but is also compatible with arc detection of decoupling circuits and battery packs, which enables the test system of the present invention to adapt to different test requirements.

[0033] Preferably, in an embodiment of the present invention, the PCS arc test device 26 may adopt a DC fault arc generator.

[0034] Preferably, in an embodiment of the present invention, the energy storage PCS arc testing system further includes a third bracket 57 for supporting the PCS arc testing device 26 , and the third bracket 57 is connected to the cabinet 11 .

[0035] like Figure 3 and Figure 7 As shown, in an embodiment of the present invention, the arc generating unit 40 includes: a discharge switch 41, which can be opened and closed, and the discharge switch 41 is arranged on the panel 12; two conductors 42, the two conductors 42 are arranged at intervals in the cabinet 11, and the circuit formed by the two conductors 42 is arranged in parallel with the discharge switch 41.

[0036] In the above technical solution, the openable and closable design of the discharge switch 41 enables the tester to accurately control the generation and elimination of the arc. When an arc needs to be generated, a short circuit can be formed by closing the discharge switch 41, thereby generating an arc between the two conductors 42. When the test is completed or an unsafe situation occurs, the arc can be quickly cut off by opening the discharge switch 41, thereby improving the safety and controllability of the test.

[0037] Furthermore, by arranging the discharge switch 41 on the panel 12, the tester can perform the switch operation at a safe distance and avoid direct contact with the high-voltage circuit.

[0038] Preferably, in the embodiment of the present invention, the discharge switch 41 is a load switch, an isolating switch or a circuit breaker.

[0039] Preferably, in an embodiment of the present invention, the energy storage PCS arc testing system further includes a first bracket 43 for supporting the discharge switch 41 and the insulator, and the first bracket 43 is connected to the cabinet 11 .

[0040] like Figure 2 As shown, in the embodiment of the present invention, an observation window 13 is provided on the cabinet 11 , and the observation window 13 is provided corresponding to the two conductors 42 .

[0041] In the above technical solution, the setting of the observation window 13 allows the arc phenomenon generated during the test to be directly observed, so that the shape, intensity and duration of the arc can be monitored in real time. Intuitive observation helps the tester to more accurately judge the nature of the arc, thereby obtaining more accurate test results.

[0042] Furthermore, the observation window 13 is arranged corresponding to the two conductors 42, which means that the tester can observe without directly contacting or approaching the high-voltage circuit. In this way, the risk of the tester accidentally contacting the high-voltage arc can be effectively avoided to enhance the safety during the test.

[0043] Preferably, in an embodiment of the present invention, the conductor 42 is made of a copper strip or a copper sheet. In an embodiment, the conductor 42 is a tungsten-nickel rod.

[0044] like Figure 7 As shown, in an embodiment of the present invention, the positive arc interface unit 21 includes a BAT positive terminal 211 for positive arc, a BAT negative terminal 212 for positive arc, a DC positive terminal 213 for positive arc and a DC negative terminal 214 for positive arc. The BAT negative terminal 212 for positive arc and the DC negative terminal 214 for positive arc are short-circuited by a wire, and the BAT positive terminal 211 for positive arc and the DC positive terminal 213 for positive arc are electrically connected through an arc generating unit 40.

[0045] In the above technical solution, by electrically connecting the BAT positive terminal 211 for positive arcing and the DC positive terminal 213 for positive arcing through the arc generating unit 40, the arc fault condition of the energy storage system or PCS product when the positive electrode is connected can be simulated, thereby accurately testing the performance and protection mechanism of the product under positive arcing conditions.

[0046] Specifically, Figure 7 As shown, in an embodiment of the present invention, the positive arc BAT positive terminal 211 and the positive arc DC positive terminal 213 are electrically connected through the arc generating unit 40, and the positive arc BAT negative terminal 212 and the positive arc DC negative terminal 214 are short-circuited through a wire to form a controllable arc fault environment. When the test starts, the discharge switch 41 is closed, and an arc can be generated between the two conductors 42 by adjusting the power supply parameters and the gap between the two conductors 42. The generation of the arc is usually accompanied by high current and high temperature, which is similar to the actual fault situation; when the test is completed or an unsafe situation is detected, the discharge switch 41 is disconnected, and the arc between the two conductors 42 can be quickly eliminated to avoid potential safety risks. In this way, the safety and controllability of the test process are ensured, and the product's own overcurrent protection and arc extinguishing mechanism are also tested.

[0047] It should be noted that the embodiment of the present invention is used in the positive arc detection mode as follows: first, the energy storage PCS product is connected to the test system to ensure that the positive electrode (BAT+ and DC+) and the negative electrode (BAT- and DC-) are correctly connected; then the test power supply is turned on and the discharge switch 41 is closed. At this time, the positive arc interface unit 21 is activated, and the positive arc BAT positive terminal 211 and the positive arc DC positive terminal 213 are electrically connected through the arc generating unit 40, while the positive arc BAT negative terminal 212 and the positive arc DC positive terminal 213 are electrically connected through the arc generating unit 40. The DC negative terminal 214 is short-circuited by a wire to form an arc-pulling circuit, during which the test parameters such as the power supply voltage, current and the gap between the conductors 42 can be adjusted to generate an arc of the desired strength; then the generation and continuation of the arc can be observed through the observation window 13, and the electrical parameters of the arc such as current and voltage, as well as the visual characteristics of the arc can be recorded using a data acquisition device; finally, when the test is completed or an unsafe situation is detected, the discharge switch 41 is disconnected to quickly eliminate the arc and stop the test process to ensure the safety of the test environment.

[0048] like Figure 7 As shown, in an embodiment of the present invention, the negative arc interface unit 22 includes a BAT positive terminal 221 for negative arc, a BAT negative terminal 222 for negative arc, a DC positive terminal 223 for negative arc and a DC negative terminal 224 for negative arc. The BAT positive terminal 221 for negative arc and the DC positive terminal 223 for negative arc are short-circuited by a wire, and the BAT negative terminal 222 for negative arc and the DC negative terminal 224 for negative arc are electrically connected through an arc generating unit 40.

[0049] In the above technical solution, by short-circuiting the BAT positive terminal 221 for negative arcing and the DC positive terminal 223 for negative arcing, and electrically connecting the BAT negative terminal 222 for negative arcing and the DC negative terminal 224 for negative arcing through the arc generating unit 40, the fault environment of negative arcing can be accurately simulated.

[0050] Specifically, Figure 7 As shown, in the embodiment of the present invention, a controllable arc fault environment is formed by short-circuiting the BAT positive terminal 221 for negative arcing and the DC positive terminal 223 for negative arcing, and electrically connecting the BAT negative terminal 222 for negative arcing and the DC negative terminal 224 for negative arcing through the arc generating unit 40. When the test starts, the discharge switch 41 is closed, and the power supply parameters and the gap between the two conductors 42 are adjusted to control the generation of the arc, simulate arcs of different strengths and characteristics, and test the performance of the product under the condition of negative arcing; after the arc simulation is completed or when a potential safety risk is detected, the discharge switch 41 is disconnected to quickly cut off the arc, ensuring the safety and controllability of the test process.

[0051] It should be noted that the use process of the embodiment of the present invention in the negative arc detection mode is as follows: first ensure that the various terminals of the negative arc interface unit 22 are correctly connected to the energy storage PCS product, and check the safety of all connections; then start the test power supply, close the discharge switch 41, at this time, the negative arc interface unit 22 is activated, and the negative arc BAT negative terminal 222 and the negative arc DC negative terminal 224 form an arc circuit through the arc generating unit 40; then adjust the parameters, such as the power supply voltage and the gap between the conductor 42, to generate the required arc; finally, observe the generation and continuation process of the arc through the observation window 13, and use the data acquisition equipment to record the arc current, voltage and other parameters, as well as the response of the product under arc conditions; finally, after the test is completed or in any unsafe condition, disconnect the discharge switch 41 to quickly eliminate the arc to ensure the safety of the test environment.

[0052] like Figure 7 As shown, in the embodiment of the present invention, the battery arc interface unit 23 includes a BAT positive terminal 231 for battery arc, a BAT negative terminal 232 for battery arc, a DC positive terminal 233 for battery arc, a DC negative terminal 234 for battery arc, a battery positive terminal 235 for battery arc and a battery negative terminal 236 for battery arc, the BAT positive terminal 231 for battery arc and the DC positive terminal 233 for battery arc are short-circuited by a wire, the BAT negative terminal 232 for battery arc and the DC negative terminal 234 for battery arc are short-circuited by a wire, and the battery positive terminal 235 for battery arc and the battery negative terminal 236 for battery arc are electrically connected through the arc generating unit 40.

[0053] In the above technical scheme, by short-circuiting the BAT positive terminal 231 for battery arcing and the DC positive terminal 233 for battery arcing, and the BAT negative terminal 232 for battery arcing and the DC negative terminal 234 for battery arcing, and at the same time electrically connecting the battery positive terminal 235 for battery arcing and the battery negative terminal 236 for battery arcing through the arc generating unit 40, it is possible to fully simulate the situation where the battery has an arcing failure at different positions, including the arcing between the positive and negative electrodes inside the battery and the arcing between the battery and the external circuit, which provides a basis for the safety performance evaluation of the battery.

[0054] Specifically, Figure 7As shown, in the embodiment of the present invention, by short-circuiting the BAT positive terminal 231 for battery arcing and the DC positive terminal 233 for battery arcing, and the BAT negative terminal 232 for battery arcing and the DC negative terminal 234 for battery arcing, it is equivalent to forming a closed circuit between the battery pack and the PCS system. At the same time, the discharge switch 41 is closed. When the two conductors 42 are in contact or too close to each other under certain conditions, high current and voltage will generate an arc between the two conductors 42, simulating an arc fault inside or outside the battery pack; when the test target is achieved or a safety risk is detected, the discharge switch 41 is disconnected to quickly cut off the arc to ensure the safety of the test process.

[0055] It should be noted that the embodiment of the present invention uses the following process in the battery pack arc detection mode: first, the positive terminal of the battery pack to be tested is connected to the BAT positive terminal 231 for battery arcing, and the positive terminal of the battery pack is connected to the BAT negative terminal 232 for battery arcing; at the same time, ensure that the connection between the battery pack and the PCS system is correct, that is, the positive terminal of the PCS system is connected to the DC positive terminal 233 for battery arcing, and the negative terminal of the PCS system is connected to the DC negative terminal 234 for battery arcing. Then turn on the main power supply of the test system to ensure that the battery arcing interface unit 23 and the arc generating unit 40 are in a ready state. At this time, the discharge switch 41 should be in a disconnected state, and the power supply parameters, including voltage, current, etc., should be adjusted according to the test requirements and battery characteristics to simulate the actual arcing conditions. Then close the discharge switch 41, and the line between the two conductors 42 is connected in parallel with the discharge switch 41 to form a loop for arc generation. By adjusting the gap and power supply parameters of the conductor 42, an arc can be generated between the conductors. At the same time, the battery positive terminal 235 for battery arcing and the battery negative terminal 236 for battery arcing are electrically connected through the arc generating unit 40 to form an arcing environment inside the battery. Then the battery arcing phenomenon, including the shape, intensity and duration of the arc, can be visually observed through the observation window 13. When the test is completed, the discharge switch 41 is disconnected to quickly cut off the arc to ensure the safety of the test system.

[0056] It should be noted that in the embodiment of the present invention, taking into account various PCS test conditions (single-branch positive pole, negative pole, between PACKs, double-branch two positive poles, two negative poles, between PCAKs, etc.), various terminals are set on the panel 12, and the corresponding test conditions can be quickly switched by plugging and unplugging.

[0057] like Figure 1 and Figure 3As shown, in an embodiment of the present invention, the energy storage PCS arc test system also includes a photovoltaic arc test device 51 located in the cabinet 11, the photovoltaic arc test device 51 is electrically connected to the first interface unit 32, and the arc generating unit 40 is electrically connected to the second interface unit 33, so that the energy storage PCS arc test system also has a photovoltaic arc detection mode.

[0058] In the above technical solution, by integrating the photovoltaic arc testing device 51 inside the cabinet 11, the arc testing capabilities of different energy systems can be integrated, which can not only test the arc performance of the energy storage system and PCS, but also be expanded to the arc detection of the photovoltaic system, thereby improving the versatility and application scope of the test system.

[0059] Furthermore, the electrical connection between the first interface unit 32 and the photovoltaic arc testing device 51 enables the testing system to flexibly switch to the photovoltaic arc detection mode without the need for additional equipment or complex setting adjustments, thereby improving the compatibility of the system and making it suitable for energy system testing of different types and scenarios.

[0060] Furthermore, the integrated design enables operators to easily switch between different test modes, reducing the complexity of operation. At the same time, modularizing each functional unit facilitates maintenance and troubleshooting, improving the availability and reliability of the equipment.

[0061] Preferably, in the embodiment of the present invention, the photovoltaic arc testing device 51 may adopt a DC fault arc generator.

[0062] Preferably, in an embodiment of the present invention, the energy storage PCS arc test system further includes a second bracket 56 for supporting the photovoltaic arc test device 51 , and the second bracket 56 is connected to the cabinet 11 .

[0063] like Figure 3 As shown, in an embodiment of the present invention, the decoupling circuit testing device 31 includes a resistor 311 and a PCB component 312 electrically connected to the resistor 311; the energy storage PCS arc testing system also includes a fixed beam 34 and a mounting member 35 arranged in the cabinet 11, the mounting member 35 is located on one side of the fixed beam 34, the PCB component 312 is installed on the fixed beam 34, and the resistor 311 is installed on the side of the mounting member 35 facing the fixed beam 34.

[0064] In the above technical solution, by arranging a fixed beam 34 and a mounting member 35 inside the cabinet 11, the fixed beam 34 provides a solid support for the PCB device 312, and the mounting member 35 positions the resistor 311, thereby ensuring the stable installation of the decoupling circuit test device 31. In this way, not only the physical stability of the device is improved, but also the spatial layout inside the cabinet is optimized, the limited space is effectively utilized, and the compact integration of the test equipment is realized.

[0065] like Figure 3 and Figure 5 As shown, in the embodiment of the present invention, the mounting member 35 is a mounting plate, and the decoupling circuit testing device 31 includes a plurality of resistors 311 , each resistor 311 is vertically arranged on the mounting plate, and the plurality of resistors 311 are spaced apart.

[0066] In the above technical solution, by arranging multiple resistors 311 vertically and utilizing the principle of natural convection, it is possible to ensure that the gap flow channel formed between the resistors 311 is consistent with the cooling air flow direction, so that the hot air rises from the bottom of the resistors and is discharged through the top, avoiding the retention of hot air between the resistors, effectively suppressing the heat deposition between the resistors 311, effectively improving the heat dissipation efficiency, preventing the resistors from overheating, and ensuring the stable operation of the test system; and in the limited cabinet 11, the multiple resistors 311 arranged vertically can make better use of space. Compared with the horizontal arrangement, the vertical arrangement can reduce the occupied horizontal space, so that other test devices and circuit control systems can be arranged more compactly in the cabinet, significantly reducing the volume of the test system, making it easier to deploy and use in different scenarios.

[0067] Furthermore, sufficient spacing between the two resistors allows for easy inspection, replacement or upgrading without disassembling the entire mounting board or affecting the normal operation of other resistors, thereby reducing maintenance costs and downtime and improving the availability and flexibility of the test system.

[0068] Specifically, in the embodiment of the present invention, the mounting plate is arranged vertically, so that switches, bakelite boards, motors, shafts and other components can be flexibly distributed in the cabinet, thereby significantly improving the space utilization rate in the cabinet.

[0069] like Figure 3 As shown, in the embodiment of the present invention, the decoupling circuit test device 31 is located below the PCS arc test device 26 and the arc generating unit 40 .

[0070] In the above technical solution, the decoupling circuit test device 31 is placed below the PCS arc test device 26 and the arc generating unit 40. Since a large amount of heat is generated during the arc test, this layout can utilize the natural law of hot air rising, so that the decoupling circuit test device 31 is in a relatively low temperature environment, thereby reducing its heat dissipation requirements and improving the overall heat dissipation efficiency; and placing the heavier decoupling circuit test device 31 (especially the multiple resistors 311 it contains) at the bottom can lower the center of gravity of the equipment, improve the stability of the cabinet 11, reduce the risk of equipment tipping over during movement or operation, and enhance the safety of the test system.

[0071] Furthermore, this layout design fully utilizes the vertical space inside the cabinet 11 and realizes the layered arrangement of different test devices, making the internal structure of the cabinet more compact, reducing the footprint of the test system, and is suitable for laboratories or field test environments with limited space.

[0072] Furthermore, by taking heat dissipation, ease of use and safety into consideration, the cabinet has a decoupling circuit detection unit below the middle and a PCS arc detection unit above the middle. This allows heat dissipation from the front and back of the resistor 311 below the middle and from above the PCS arc detection unit above the middle.

[0073] like Figure 2 As shown, in the embodiment of the present invention, a heat dissipation area 52 is provided on the cabinet, and a heat dissipation area 52 is provided on at least one side of the decoupling circuit testing device 31 .

[0074] In the above technical solution, the resistor 311 in the decoupling circuit will generate a large amount of heat energy during high-power testing. The setting of the heat dissipation area 52 can ensure that the heat energy is quickly dissipated, effectively increase the turbulence near the decoupling circuit test device 31, enhance convection heat dissipation, avoid excessive internal temperature, and help maintain the stable operation of the test system and extend its service life.

[0075] Furthermore, the setting of the heat dissipation area 52 cooperates with the position of the decoupling circuit testing device 31, which not only ensures sufficient heat dissipation space but also does not occupy additional cabinet space, thereby achieving a compact structure and effective use of space, which is particularly important for scenarios where complex tests are performed in a limited space.

[0076] Furthermore, the layout design of the heat dissipation area 52 and the decoupling circuit test device 31 and other test devices (such as the PCS arc test device 26 and the arc generating unit 40) fully considers the air flow direction and heat source distribution, and realizes the balanced distribution of heat inside the cabinet.

[0077] Preferably, if Figure 2 As shown, in the embodiment of the present invention, the heat dissipation area 52 is a heat dissipation channel, such as a large-aperture square through-hole grille, to increase the air flow speed and improve the heat exchange efficiency. These channels can be straight-through or zigzag, depending on the internal layout of the cabinet and the heat dissipation requirements.

[0078] like Figure 4 and Figure 6 As shown, in the embodiment of the present invention, the bottom wall of the cabinet 11 is provided with an air inlet channel 14 , the top wall of the cabinet 11 is provided with an air outlet channel 15 , and the air inlet channel 14 and the air outlet channel 15 are connected through the interior of the cabinet 11 .

[0079] In the above technical scheme, the natural law of hot air rising can be utilized to effectively guide cold air to enter from the bottom of the cabinet 11 and hot air to be discharged from the top, forming a stable heat convection, improving the heat dissipation efficiency, avoiding local overheating, and ensuring the stable operation and electrical performance of each test device in the cabinet 11.

[0080] Furthermore, the arrangement of the air inlet duct 14 and the air outlet duct 15 takes into account the overall layout inside the cabinet, and matches the positions of major test components such as the decoupling circuit test device 31, the PCS arc test device 26, and the arc generating unit 40, thereby optimizing space utilization without affecting the installation and operation of the test device, so that the test system can maintain efficient heat dissipation while being as small as possible.

[0081] Furthermore, the resistor 311 usually generates a large amount of heat when working. Installing it at a specific position of the mounting member 35 can optimize the heat dissipation path. In particular, when the mounting member 35 is designed with heat dissipation holes or cooperates with the air inlet channel 14 and the air outlet channel 15 of the cabinet, it can effectively improve the heat dissipation efficiency, avoid performance degradation or equipment damage caused by overheating of the resistor, and extend the service life of the device.

[0082] Furthermore, the air inlet channel 14 and the air outlet channel 15 are respectively located around and on the top of the heat-prone components of the cabinet, which can reduce cooling dead corners caused by the layout in the cabinet.

[0083] Preferably, in an embodiment of the present invention, the air inlet channel 14 is formed by air inlet grille meshes.

[0084] like Figure 1 As shown, in an embodiment of the present invention, the panel 12 has a PCS switch fixed area, a photovoltaic arc control area, a decoupling circuit control area, a PCS arc control area and an AC input and output area, wherein the discharge switch 41 of the arc generating unit 40 is located in the PCS switch fixed area, the photovoltaic arc control area is provided with a photovoltaic arc discharge switch 53, the first interface unit 32 is located in the decoupling circuit control area, the second interface unit 33, the positive arc interface unit 21, the negative arc interface unit 22 and the battery arc interface unit 23 are all located in the PCS arc control area, and the AC input and output area is provided with an AC output socket 54 and an AC power supply port 55.

[0085] In the above technical solution, the zone layout design of the panel 12 enables the tester to quickly locate the specific control and interface areas, improve the operation efficiency, and the discharge switch 41 and the photovoltaic arc discharge switch 53 are respectively set in obvious areas, which is convenient for rapid response and operation, while reducing the risk of misoperation.

[0086] Furthermore, the separate layout of various control areas, such as the PCS switch fixing area, the photovoltaic arc control area, the decoupling circuit control area, etc., avoids electrical interference and improves the stability and safety of the system.

[0087] Furthermore, different control areas on the panel correspond to different test functions, realizing modular design of functions and facilitating system maintenance and upgrade. For example, the first interface unit 32 of the decoupling circuit control area, the failure or upgrade of a single module will not affect the normal operation of other areas.

[0088] Furthermore, the second interface unit 33, the positive arc interface unit 21, the negative arc interface unit 22 and the battery arc interface unit 23 are centrally arranged in the PCS arc control area, which simplifies the electrical connection, reduces the complexity of wiring, and reduces potential electrical safety hazards.

[0089] Preferably, in an embodiment of the present invention, the photovoltaic arc discharge switch 53 is a load switch, an isolating switch or a circuit breaker; the AC output socket 54 is an AC 220V output socket, and the AC power supply port 55 is an external AC 220V power supply port.

[0090] Specifically, in an embodiment of the present invention, the cabinet 11 includes two front vertical beams, two rear vertical beams, a top frame plate and a bottom frame plate, and the panel 12 is fixed on the two front vertical beams. From top to bottom, they are a PCS switch fixing area, a photovoltaic arc control area, a decoupling circuit control area, a PCS arc control area and an AC input and output area.

[0091] Specifically, Figure 5 and Figure 6 As shown, in the embodiment of the present invention, four circular holes are opened on the upper and lower parts of the mounting member 35 to facilitate wiring, and an external wire entry hole 37 is provided on the bottom frame plate of the cabinet 11, so that the wiring of the resistor 311 can be convenient.

[0092] Specifically, Figure 5 As shown, in the embodiment of the present invention, the cabinet further comprises two side doors arranged on both sides of the cabinet body 11, and a sheet metal buckle 28 is arranged in the cabinet body 11 to facilitate the quick disassembly and installation of the side doors. An inspection port 2 is arranged on one of the two side doors, a safety protection plate 29 is arranged on the side of the resistor 311 facing the side door to improve the safety of the resistor 311, and a cabinet grounding installation area 27 is arranged on one of the two side doors.

[0093] Specifically, Figure 6 As shown, in the embodiment of the present invention, four movable casters 39 are provided on the bottom frame plate.

[0094] It should be noted that the present invention is mainly to protect the layout of various components in the energy storage PCS arc test system, and its specific electrical connection method and principle will not be repeated here.

[0095] It should be noted that if Figure 1 As shown, the photovoltaic arc control area is provided with a photovoltaic arc command switching switch 3, a photovoltaic arc RS485 communication interface 4 and a photovoltaic arc operation indication 5, wherein, by adjusting the photovoltaic arc command switching switch 3, the tester can start or stop the arc test of the photovoltaic system; through the photovoltaic arc RS485 communication interface 4, the photovoltaic arc test system can be easily integrated with other test equipment or management systems to form a more comprehensive test network; the photovoltaic arc operation indication 5 provides the tester with an intuitive visual feedback, indicating whether the photovoltaic system is currently performing an arc test. The PCS arc control area is also provided with a PCS arc operation indication 7, a PCS arc stop indication 8, and a PCS system arc RS485 communication command interface 16, wherein the PCS arc operation indication 7 provides intuitive visual feedback to the test operator, indicating whether the PCS system is currently performing an arc test; when the PCS arc test is stopped or interrupted, the PCS arc stop indication 8 will notify the operator through a specific display mode (such as light off, static color or specific icon display), which not only provides information confirmation of the test stop, but also serves as a safety warning to the on-site personnel, informing them that the test operation has ended and they can safely approach the test area; the use of the PCS system arc RS485 communication command interface 16 enables the energy storage PCS arc test system to be integrated with other test equipment or management systems to form a more comprehensive test network. That is, by setting the above-mentioned interfaces and indications, it is possible to access external test devices under different working conditions, and it is possible to display the operating status of the energy storage PCS arc test system of the present invention.

[0096] It should be noted that the embodiment of the present invention provides an overall structural layout of the test system for energy storage and PCS products in the arc (electric arc) system, and the device has the characteristics of small size, compact structure, high space utilization and multiple detection functions to meet the detection requirements of energy storage products and PCS products in different scenarios. Furthermore, the energy storage PCS arc test system of this embodiment can also be applied to photovoltaic, energy storage, and PCS liquid cooling scenarios, and can specifically test the positive arc, negative arc, positive and negative arc of the battery pack, and matching tests of PCS products; the components in the cabinet are arranged in multiple layers up and down and front and back, which effectively utilizes the free space in the cabinet and reduces the platform volume.

[0097] It should be noted that the energy storage PCS arc test system in the embodiment of the present invention has a compact structure. By arranging a PCS switch fixing area, a photovoltaic arc control area, a decoupling circuit control area, a PCS arc control area and an AC input and output area on the panel 12, structural materials are saved and the total weight of the device is reduced. The PCS arc test device 26, the photovoltaic arc test device 51, the decoupling circuit test device 31 and each circuit control system are flexibly arranged in the cabinet, which effectively utilizes the free space in the cabinet and significantly reduces the volume of the energy storage PCS arc test system.

[0098] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: by reasonably arranging key components such as the PCS arc detection unit, the decoupling circuit detection unit and the arc generation unit in the cabinet and on the panel, the components used to detect positive arcing, negative arcing and battery pack arcing in the test system can be reasonably arranged, and the cabinet can be directly moved to different scenarios. By directly connecting the external system to be detected (such as the energy storage PCS system) to the panel, it can adapt to the detection requirements of different scenarios; and the energy storage PCS arc test system has the detection functions of positive arcing, negative arcing and battery pack arcing, which can cover a variety of arc fault types that may be encountered by PCS and energy storage systems. The diversity of detection modes can adapt to the detection requirements of different scenarios to ensure that the system can comprehensively evaluate the arc protection performance of PCS and energy storage systems.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy storage PCS arc test system, characterized in that: include: A cabinet comprising a cabinet body (11) and a panel (12) arranged on the cabinet body (11); A PCS arc detection unit comprises a PCS arc test device (26) and a positive arc interface unit (21), a negative arc interface unit (22) and a battery arc interface unit (23) which are all electrically connected to the PCS arc test device (26), wherein the PCS arc test device (26) is installed in the cabinet (11), and the positive arc interface unit (21), the negative arc interface unit (22) and the battery arc interface unit (23) are arranged on the panel (12); A decoupling circuit detection unit comprises a decoupling circuit test device (31), a first interface unit (32) and a second interface unit (33); the PCS arc test device (26), the decoupling circuit test device (31) and the second interface unit (33) are all electrically connected to the first interface unit (32); the decoupling circuit test device (31) is located in the cabinet (11); and the first interface unit (32) and the second interface unit (33) are arranged on the panel (12); An arc generating unit (40) is used to generate an arc. The positive arc interface unit (21), the negative arc interface unit (22) and the battery arc interface unit (23) share the arc generating unit (40), so that the energy storage PCS arc testing system has at least a positive arc detection mode, a negative arc detection mode and a battery pack arc detection mode.

2. The energy storage PCS arc test system according to claim 1, characterized in that: The arc generating unit (40) comprises: A discharge switch (41) is set to be openable and closable, and the discharge switch (41) is set on the panel (12); Two conductors (42), the two conductors (42) are arranged in the cabinet (11) at intervals, and the circuit formed by the two conductors (42) is arranged in parallel with the discharge switch (41).

3. The energy storage PCS arc test system according to claim 2, characterized in that: An observation window (13) is provided on the cabinet (11), and the observation window (13) is arranged corresponding to the two conductors (42).

4. The energy storage PCS arc test system according to any one of claims 1 to 3, characterized in that: The positive arc drawing interface unit (21) comprises a BAT positive terminal (211) for positive arc drawing, a BAT negative terminal (212) for positive arc drawing, a DC positive terminal (213) for positive arc drawing and a DC negative terminal (214) for positive arc drawing, the BAT negative terminal (212) for positive arc drawing and the DC negative terminal (214) for positive arc drawing are short-circuited by a wire, and the BAT positive terminal (211) for positive arc drawing and the DC positive terminal (213) for positive arc drawing are electrically connected via the arc drawing generating unit (40); or, The negative pole arcing interface unit (22) comprises a BAT positive terminal (221) for negative pole arcing, a BAT negative terminal (222) for negative pole arcing, a DC positive terminal (223) for negative pole arcing and a DC negative terminal (224) for negative pole arcing, the BAT positive terminal (221) for negative pole arcing and the DC positive terminal (223) for negative pole arcing are short-circuited by a wire, and the BAT negative terminal (222) for negative pole arcing and the DC negative terminal (22A4) for negative pole arcing are electrically connected via the arcing generating unit (40); or, The battery arcing interface unit (23) comprises a BAT positive terminal (231) for battery arcing, a BAT negative terminal (232) for battery arcing, a DC positive terminal (233) for battery arcing, a DC negative terminal (234) for battery arcing, a battery positive terminal (235) for battery arcing, and a battery negative terminal (236) for battery arcing; the BAT positive terminal (231) for battery arcing and the DC positive terminal (233) for battery arcing are short-circuited by a wire, the BAT negative terminal (232) for battery arcing and the DC negative terminal (234) for battery arcing are short-circuited by a wire, and the battery positive terminal (235) for battery arcing and the battery negative terminal (236) for battery arcing are electrically connected via the arcing generating unit (40).

5. The energy storage PCS arc test system according to any one of claims 1 to 3, characterized in that: The energy storage PCS arc test system also includes a photovoltaic arc test device (51) located in the cabinet (11), the photovoltaic arc test device (51) is electrically connected to the first interface unit (32), and the arc generating unit (40) is electrically connected to the second interface unit (33), so that the energy storage PCS arc test system also has a photovoltaic arc detection mode.

6. The energy storage PCS arc test system according to any one of claims 1 to 3, characterized in that: The decoupling circuit testing device (31) comprises a resistor (311) and a PCB component (312) electrically connected to the resistor (311); The energy storage PCS arc test system also includes a fixed beam (34) and a mounting member (35) arranged in the cabinet (11), wherein the mounting member (35) is located on one side of the fixed beam (34), the PCB device (312) is mounted on the fixed beam (34), and the resistor (311) is mounted on the side of the mounting member (35) facing the fixed beam (34).

7. The energy storage PCS arc test system according to claim 6, characterized in that: The mounting member (35) is a mounting plate, and the decoupling circuit testing device (31) comprises a plurality of resistors (311), each of the resistors (311) is vertically arranged on the mounting plate, and the plurality of resistors (311) are arranged at intervals.

8. The energy storage PCS arc test system according to any one of claims 1 to 3, characterized in that: The decoupling circuit test device (31) is located below the PCS arc test device (26) and the arc generating unit (40).

9. The energy storage PCS arc test system according to any one of claims 1 to 3, characterized in that: The cabinet is provided with a heat dissipation area (52), and at least one side of the decoupling circuit testing device (31) is provided with the heat dissipation area (52).

10. The energy storage PCS arc test system according to any one of claims 1 to 3, characterized in that: The bottom wall of the cabinet (11) is provided with an air inlet channel (14), and the top wall of the cabinet (11) is provided with an air outlet channel (15), and the air inlet channel (14) and the air outlet channel (15) are connected through the interior of the cabinet (11).

11. The energy storage PCS arc test system according to any one of claims 1 to 3, characterized in that: The panel (12) comprises a PCS switch fixing area, a photovoltaic arc control area, a decoupling circuit control area, a PCS arc control area and an AC input and output area, wherein the discharge switch (41) of the arc generating unit (40) is located in the PCS switch fixing area, the photovoltaic arc control area is provided with a photovoltaic arc discharge switch (53), the first interface unit (32) is located in the decoupling circuit control area, the second interface unit (33), the positive arc interface unit (21), the negative arc interface unit (22) and the battery arc interface unit (23) are all located in the PCS arc control area, and the AC input and output area is provided with an AC output socket (54) and an AC power supply port (55).

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