Energy storage vehicle wiring system for realizing fault zero millisecond switching and control method

Abstract

The invention provides an energy storage vehicle wiring system for realizing fault zero millisecond switching and a control method. The energy storage vehicle wiring system comprises a first power supply module, a second power supply module and an energy storage vehicle battery system. The first power supply module is connected with a load through the STS grid-connected and off-grid device, and directly supplies power to the load by using alternating current; the second power supply module converts the alternating current into the direct current through the PCS device, supplies power to the load through the inversion state of the PCS device, and charges the energy storage vehicle battery system at the same time. When the alternating current breaks down, the first power supply module and the second power supply module stop supplying power, the STS grid-connected and off-grid device can be immediately switched to the energy storage vehicle battery system, power is directly supplied to the load through the inversion state of the PCS device, and zero-millisecond fault switching is achieved. The system utilizes the second power supply module to enable the PCS device to be in an inversion state continuously, thereby ensuring that power can be continuously supplied to the load seamlessly when the alternating current fails, and improving the reliability and continuity of the system.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power systems, and in particular relates to a connection system and a control method for an energy storage vehicle that realizes zero-millisecond fault switching. Background Art

[0002] In recent years, with the development of social economy and the improvement of people's living standards, the electricity load has continued to increase. Especially when the proportion of renewable energy power generation has increased significantly, the peak-to-valley difference of the power system has further increased, leading to the increasingly prominent problem of power resource shortage. In order to meet this challenge, the introduction of energy storage technology in the power system has become an effective solution. It can not only help alleviate the demand pressure during peak electricity consumption, but also improve the daily load rate of the power system, thereby improving the utilization rate of power generation equipment.

[0003] Although the application of energy storage technology has brought many benefits, traditional energy storage devices are usually installed in fixed locations, which limits their flexibility and efficiency. In contrast, mobile energy storage vehicles have higher flexibility and can provide power support in different locations and time ranges, especially as emergency power supplies in emergency situations. However, the existing wiring method of energy storage vehicles has certain limitations. When the AC mains fails, the static switch STS (Static Transfer Switch) and the off-grid device need to switch with the power conversion device PCS (Power Conversion System). This process takes about 20 milliseconds, which not only increases the fault clearing time, but also reduces the reliability of power supply.

[0004] In view of the above problems, it is particularly important to develop a new way to connect energy storage vehicles. This improved wiring method needs to be able to solve the problem of long switching time without affecting the original advantages of the energy storage vehicle battery system. Especially for power emergency services, the ability to achieve zero millisecond switching is crucial to improving the stability and reliability of power supply. Summary of the invention

[0005] In view of the above problems, the present invention proposes a wiring system and control method for an energy storage vehicle that can achieve zero-millisecond switching in case of faults. While the battery system of the energy storage vehicle has the advantage of managing power quality, it can effectively solve the problem of long switching time. When a mains power failure occurs, zero-millisecond switching can be achieved, which greatly improves the power supply reliability, has stronger applicability, and has broad development prospects.

[0006] In order to achieve the above object, the technical solution provided by the present invention is as follows:

[0007] In a first aspect, the present invention provides a connection system for an energy storage vehicle that implements zero millisecond fault switching, comprising:

[0008] A first power supply module, a second power supply module and an energy storage vehicle battery system;

[0009] The first power supply module is connected to the load through a static switch and off-grid device, and is used to power the load with AC power;

[0010] The second power supply module and the energy storage vehicle battery system are both connected to the load through a power conversion device. The second power supply module is used to convert AC power into DC power and then supply power to the load through the power conversion device. During the power supply process, the power conversion device is in an inverter state;

[0011] The second power supply module is also connected to the battery system of the energy storage vehicle, and is used to charge the battery system of the energy storage vehicle;

[0012] When the AC power fails, both the first power supply module and the second power supply module stop supplying power, the static switch and the off-grid device are switched immediately, and the energy storage vehicle battery system directly supplies power to the load through the power conversion device in the inverter state.

[0013] Further, the second power supply module includes: an AC power access module and a current conversion module;

[0014] The AC power access module is used to access AC power;

[0015] The current conversion module is used to convert alternating current into direct current;

[0016] The current conversion module disconnects immediately when the AC power fails.

[0017] Furthermore, the current conversion module includes: an AC / DC converter, the AC side of the AC / DC converter is connected to the AC power access module, and the DC side outputs DC power.

[0018] Furthermore, the second power supply module is connected to the battery system of the energy storage vehicle via a DC bus, the DC side of the power conversion device is connected to the DC bus, and the AC side is connected to the load;

[0019] The second power supply module sends the converted DC power into the DC bus and charges the battery system of the energy storage vehicle;

[0020] The power conversion device converts the DC power of the DC bus into AC power to supply power to the load. During the power supply process, the power conversion device is in an inverter state.

[0021] Furthermore, the first power supply module, the second power supply module and the load end are all provided with protection devices, and the protection devices are used to cut off the connection between the first power supply module, the second power supply module or the load end and the system.

[0022] Furthermore, the protection device includes a circuit breaker.

[0023] In a second aspect, the present invention provides a control method for implementing zero millisecond switching of faults, which is implemented based on the energy storage vehicle wiring system for implementing zero millisecond switching of faults as in the first aspect, and includes the following steps:

[0024] In response to an AC power failure signal, the static switch is switched and the off-grid device is disconnected, so that the first power supply module stops supplying power to the load, and at the same time, the second power supply module stops supplying power to the load;

[0025] The battery system of the energy storage vehicle is switched to a power supply state, and the load is directly powered by a power conversion device in an inverter state.

[0026] In a third aspect, the present invention further provides a computer device, the device comprising a processor and a memory:

[0027] The memory is used to store the computer program and send the instructions of the computer program to the processor;

[0028] The processor executes a control method for implementing zero-millisecond fault switching as described in the first aspect according to instructions of the computer program.

[0029] In a fourth aspect, the present invention further provides a computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, a control method for realizing zero-millisecond fault switching as in the first aspect is implemented.

[0030] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program, characterized in that when the computer program is executed by a processor, it implements a control method for realizing zero-millisecond fault switching as in the first aspect.

[0031] In summary, the present invention provides an energy storage vehicle wiring system that achieves zero-millisecond switching in case of faults, including a first power supply module, a second power supply module, and an energy storage vehicle battery system. The first power supply module is connected to the load through an STS grid-connected and off-grid device, and directly uses AC power to power the load; the second power supply module converts the AC power into DC power through a PCS device, and then powers the load through the inverter state of the PCS device, and charges the energy storage vehicle battery system at the same time. When the AC power fails, both the first power supply module and the second power supply module stop supplying power, and the STS grid-connected and off-grid device can immediately switch to the energy storage vehicle battery system, and directly power the load through the inverter state of the PCS device, achieving zero-millisecond switching in case of faults. The system uses the second power supply module to keep the PCS device in an inverter state, ensuring that the load can continue to be powered seamlessly when the AC power fails, improving the reliability and continuity of the system, and solving the problem caused by the long switching time of the PCS device in the traditional solution.

[0032] The above control method, computer device, computer-readable storage medium and computer program product have similar effects when implemented based on the above system, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A wiring diagram of an energy storage vehicle wiring system that implements zero-millisecond fault switching provided by an embodiment of the present invention;

[0035] Figure 2 A wiring diagram of a typical energy storage vehicle wiring system provided by the present invention;

[0036] Figure 3 A flow chart of a control method for implementing zero-millisecond fault switching provided by an embodiment of the present invention;

[0037] Figure 4 A block diagram of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1 and 2 , Figure 1 A wiring method of an energy storage vehicle wiring system that realizes zero millisecond switching for faults is shown; Figure 2 A traditional wiring method of an energy storage vehicle wiring system is shown.

[0040] like Figure 2As shown, the AC mains is connected to the power supply target load through the QF1 circuit breaker and the STS on-grid and off-grid device, and the energy storage vehicle battery system flows energy with the system through the PCS. When the AC mains is low voltage or fails, the STS on-grid and off-grid device is disconnected, the PCS switches to V / F mode, and performs wave sealing and anti-shake processing at the same time. Then the energy storage vehicle battery system supplies power to the power supply target load. During this process, the STS on-grid and off-grid device and the PCS both require switching time, which is about 20ms. After the fault is cleared, the same switching time is required, which greatly reduces the power supply reliability.

[0041] In view of the above problems, the present invention proposes a wiring method for an energy storage vehicle that can achieve zero-millisecond switching in case of faults. While the battery system of the energy storage vehicle has the advantage of managing the power quality, it can effectively solve the problem of long switching time. When a mains power failure occurs, zero-millisecond switching can be achieved, which greatly improves the power supply reliability, has stronger applicability, and has broad development prospects.

[0042] This embodiment provides an energy storage vehicle wiring system that implements zero-millisecond fault switching, including:

[0043] A first power supply module, a second power supply module and an energy storage vehicle battery system;

[0044] The first power supply module is connected to the load through the STS on-grid and off-grid device, and is used to supply power to the load using AC power;

[0045] The second power supply module and the energy storage vehicle battery system are both connected to the load through the PCS device. The second power supply module is used to convert AC power into DC power and then supply power to the load through the PCS device. During the power supply process, the PCS device is in an inverter state.

[0046] The second power supply module is also connected to the battery system of the energy storage vehicle, and is used to charge the battery system of the energy storage vehicle;

[0047] When the AC power fails, both the first power supply module and the second power supply module stop supplying power, the STS on-grid and off-grid device switches immediately, and the energy storage vehicle battery system directly supplies power to the load through the PCS device in the inverter state.

[0048] In this embodiment, the STS on-grid and off-grid device, namely STS (Static Transfer Switch), is a device that can quickly and seamlessly switch between two power sources to ensure uninterrupted power supply to the load. When the main power source (such as the power grid) fails, the STS can immediately switch the load to the backup power source to avoid power interruption. The on-grid and off-grid device refers to a switching device that can operate in parallel with the power grid and can operate independently.

[0049] PCS (Power Conditioning System, energy storage converter) is a device used to convert and control power, especially in energy storage systems, and can achieve bidirectional conversion between direct current (DC) and alternating current (AC). In this solution, the PCS device is responsible for converting the DC power converted by the second power supply module into AC power to power the load, and converting the DC power of the energy storage vehicle battery system into AC power when necessary.

[0050] During normal power supply, the first power supply module directly uses AC power to power the load through the STS off-grid device. The second power supply module converts AC power into DC power and powers the load through the PCS device. In this process, the PCS device is in an inverter state, that is, converting DC power into AC power. At the same time, the second power supply module also charges the battery system of the energy storage vehicle.

[0051] When the AC power fails, both the first and second power supply modules stop supplying power. The STS off-grid device immediately switches to the energy storage vehicle battery system. The energy storage vehicle battery system directly supplies power to the load through the PCS device (still in inverter state), achieving zero millisecond switching.

[0052] This embodiment provides a storage vehicle wiring system that achieves zero millisecond switching when a fault occurs. The system can immediately switch to the storage vehicle battery system for power supply when an AC power failure occurs, achieving zero millisecond switching when a fault occurs and ensuring the continuity of power supply. At the same time, the stability and reliability of the system are ensured through the fast switching of the STS on-grid and off-grid device and the inverter function of the PCS device.

[0053] In some embodiments, the second power supply module may be designed to include an AC power access module and a current conversion module. The AC power access module is used to access AC power; the current conversion module is used to convert AC power into DC power; and the current conversion module is immediately disconnected when AC power fails.

[0054] In this embodiment, the AC power access module is used to access AC power, that is, to obtain power from a power grid or other AC power sources. The current conversion module is used to convert the accessed AC power into DC power for subsequent power processing and storage.

[0055] During normal power supply, the AC power access module obtains AC power from an external power source, and the current conversion module converts the AC power into DC power for subsequent use.

[0056] When an AC power failure occurs, the current conversion module detects that the AC power failure occurs, such as a voltage drop, a power outage, etc. The current conversion module immediately disconnects and stops converting the AC power into DC power.

[0057] In some embodiments, the current conversion module includes: an AC / DC converter (AC / DC converter), the AC side of the AC / DC converter is connected to the AC power access module, and the DC side outputs DC power.

[0058] In this embodiment, the AC / DC converter can efficiently convert AC power into DC power, thereby improving energy conversion efficiency. When the AC / DC converter detects a fault in the AC power supply, such as a voltage drop or power outage, the converter will quickly stop working and cut off the connection between the AC power supply and the DC load to prevent damage or safety accidents. The locking mechanism usually includes cutting off the internal switching elements (such as IGBT, MOSFET, etc.) to ensure that no current flows.

[0059] In some embodiments, the second power supply module is connected to the battery system of the energy storage vehicle via a DC bus, the DC side of the PCS device is connected to the DC bus, and the AC side is connected to the load;

[0060] The second power supply module sends the converted DC power into the DC bus and charges the battery system of the energy storage vehicle;

[0061] The PCS device converts the DC power of the DC bus into AC power and then supplies power to the load. During the power supply process, the PCS device is in an inverter state.

[0062] In this embodiment, the DC bus is a DC power supply line connecting the second power supply module, the PCS device and the energy storage vehicle battery system. It serves as an intermediate link for transmitting DC power and providing a stable DC power supply for the PCS device and the energy storage vehicle battery system. The PCS device is responsible for converting DC power into AC power and connecting to the load through the AC side to supply power to the load. The PCS device is in an inverter state during the power supply process, that is, converting from DC power to AC power.

[0063] During normal power supply, the second power supply module converts AC power into DC power and sends it to the PCS device through the DC bus. The PCS device converts DC power into AC power and supplies power to the load through the AC side. During this process, the PCS device is in an inverter state.

[0064] When charging the battery system of the energy storage vehicle, the second power supply module sends the converted DC power to the DC bus, and the DC power on the DC bus charges the battery system of the energy storage vehicle.

[0065] The design of this embodiment ensures efficient energy conversion and stable operation of the system, while also providing necessary protection functions and enhancing the safety and reliability of the system.

[0066] In some embodiments, the first power supply module, the second power supply module and the load end are all provided with protection devices, and the protection devices are used to cut off the connection between the first power supply module, the second power supply module or the load end and the system.

[0067] In this embodiment, the protection device is used to cut off the circuit when an abnormal situation (such as overvoltage, overcurrent, short circuit, etc.) is detected to protect the system from damage.

[0068] In some embodiments, the protection device includes a circuit breaker.

[0069] In this embodiment, a circuit breaker is used as a protection device. A circuit breaker is a commonly used electrical protection device that can automatically disconnect the circuit in abnormal situations such as overload and short circuit to protect electrical equipment and lines from damage. The existence of a circuit breaker improves the overall reliability of the system, ensuring a quick response when an abnormality occurs and avoiding system failure.

[0070] like Figure 1 As shown, Figure 1 This is a wiring system for energy storage vehicles that realizes zero-millisecond switching in case of faults, which is proposed in combination with the above-mentioned embodiments. The AC measurement is similar to the wiring method of a typical energy storage vehicle. The AC mains is connected to the power supply object load through the QF1 circuit breaker and the STS grid-connected and disconnected device. In the DC measurement, the AC mains is connected to the AC / DC converter through the QF3 circuit breaker, and the AC power of the grid is converted into DC power and sent to the DC bus. The battery system of the energy storage vehicle is directly connected to the DC bus, and the DC bus converts the DC power into AC power through the PCS and sends it to the system.

[0071] In this wiring method, when the AC mains is operating normally, the AC mains not only supplies power to the load of the power supply object on the AC side, but also charges the battery system of the energy storage vehicle on the DC side. When the grid is under voltage or overloaded, the battery system of the energy storage vehicle can support the grid through the PCS to achieve the effect of managing power quality.

[0072] When the AC mains fails: the STS on-grid and off-grid device is disconnected, the AC / DC converter is locked to prevent the fault from expanding, and the energy storage vehicle battery system serves as a backup power source to supply power to the load. During this process, since the PCS is always in the inverter state to support the load, there is no need for switching, thus achieving 0 millisecond switching when a fault occurs, greatly enhancing power supply reliability.

[0073] Compared with the typical energy storage vehicle wiring method, this system has the following advantages:

[0074] (1) Power quality management

[0075] The present invention proposes a wiring system for an energy storage vehicle that realizes zero-millisecond switching for faults. The AC mains not only supplies power to the load through the PCS on the DC side, but also charges the battery system of the energy storage vehicle. When the grid is under voltage or overloaded, the battery system of the energy storage vehicle can support the grid through the PCS to achieve power quality management.

[0076] (2) Achieve zero millisecond switching

[0077] The energy storage vehicle wiring system proposed in the present invention can achieve zero millisecond switching of fault power supply mode when a fault occurs, thereby greatly improving the power supply reliability.

[0078] (3) Low transformation cost

[0079] The AD / DC converter used in the DC measurement of the energy storage vehicle wiring system that realizes zero-millisecond switching in case of faults proposed in the present invention is a common product on the market. The product is complete and low-priced. After the transformation, the PCS only needs to realize the inverter function, which reduces the cost.

[0080] Based on the same inventive concept, the embodiment of the present application also provides a control method for achieving zero millisecond switching of faults based on the energy storage vehicle wiring system for achieving zero millisecond switching of faults involved above. The implementation scheme for solving the problem provided by this method is similar to the implementation scheme recorded in the above system, so the specific limitations in the control method embodiment for achieving zero millisecond switching of faults provided below can be referred to the limitations of the energy storage vehicle wiring system for achieving zero millisecond switching of faults above, and will not be repeated here.

[0081] See also Figure 3 This embodiment provides a control method for implementing zero millisecond switching of faults, which is based on the energy storage vehicle wiring system for implementing zero millisecond switching of faults as in the above embodiment, and includes the following steps:

[0082] S1: In response to an AC power failure signal, the STS is switched off the grid device, so that the first power supply module stops supplying power to the load, and at the same time, the second power supply module stops supplying power to the load.

[0083] It should be noted that when the system detects that the AC power fails, the STS off-grid device immediately operates to cut off the connection between the first power supply module and the load, so that the first power supply module stops supplying power to the load. At the same time, the second power supply module is controlled to stop supplying power to the load.

[0084] S2: Switch the battery system of the energy storage vehicle to the power supply state, and directly supply power to the load through the PCS device in the inverter state.

[0085] It should be noted that the energy storage vehicle battery system starts to supply power to the load through the inverter state of the PCS device. The PCS device converts the DC power of the energy storage vehicle battery system into AC power to provide stable power to the load.

[0086] This embodiment provides a control method for achieving zero millisecond switching in case of faults. By using the STS on-grid and off-grid device in conjunction with the PCS device, power can be immediately switched to the energy storage vehicle battery system when an AC power failure occurs, ensuring the continuity of power supply and high reliability of the system. This control method achieves seamless switching by quickly responding to AC power fault signals, thereby improving the stability and safety of the system.

[0087] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0088] Reference Figure 4 The embodiment of the present invention further provides a computer device, including: a memory and a processor and a computer program stored in the memory. When the computer program is executed on the processor, the control method for achieving zero-millisecond fault switching as described above is implemented.

[0089] The computer device may be a desktop computer, a notebook, a PDA, a cloud server or other computing device. The computer device may include, but is not limited to, a processor and a memory. Those skilled in the art will understand that Figure 4 It is only an example of a computer device and does not constitute a limitation of the computer device. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, it may also include input and output devices, network access devices, etc.

[0090] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0091] In some embodiments, the memory may be an internal storage unit of the computer device, such as a hard disk or memory of the computer device. In other embodiments, the memory may also be an external storage device of the computer device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the computer device. Further, the memory may include both an internal storage unit and an external storage device of the computer device. The memory is used to store an operating system, an application program, a boot loader (BootLoader), data, and other programs, such as the program code of the computer program. The memory may also be used to temporarily store data that has been output or is to be output.

[0092] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the control method for achieving zero-millisecond switching for failure as described above is implemented.

[0093] In this embodiment, if the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium can at least include: any entity or device that can carry the computer program code to the camera / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. For example, USB flash drive, mobile hard disk, disk or optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0094] An embodiment of the present invention further provides a computer program product, including a computer program, characterized in that when the computer program is executed by a processor, the control method for achieving zero-millisecond fault switching as described above is implemented.

[0095] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0096] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0097] In the embodiments disclosed in the present application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0098] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A connection system for an energy storage vehicle that realizes zero millisecond fault switching, characterized in that: include: A first power supply module, a second power supply module and an energy storage vehicle battery system; The first power supply module is connected to the load via a static switch and off-grid device, and is used to power the load using alternating current; The second power supply module and the energy storage vehicle battery system are both connected to the load through a power conversion device. The second power supply module is used to convert AC power into DC power and then supply power to the load through the power conversion device. During the power supply process, the power conversion device is in an inverter state. The second power supply module is also connected to the energy storage vehicle battery system and is used to charge the energy storage vehicle battery system; When the AC power fails, both the first power supply module and the second power supply module stop supplying power, the static switch and off-grid device are switched immediately, and the energy storage vehicle battery system directly supplies power to the load through the power conversion device in the inverter state.

2. The energy storage vehicle wiring system for realizing zero millisecond fault switching according to claim 1, characterized in that: The second power supply module includes: an AC power access module and a current conversion module; The AC power access module is used to access the AC power; The current conversion module is used to convert the alternating current into direct current; The current conversion module is disconnected immediately when an alternating current failure occurs.

3. The energy storage vehicle wiring system for realizing zero millisecond fault switching according to claim 2 is characterized in that: The current conversion module includes: an AC / DC converter, the AC side of the AC / DC converter is connected to the AC power access module, and the DC side outputs the DC power.

4. The energy storage vehicle wiring system for realizing zero millisecond fault switching according to claim 1, characterized in that: The second power supply module is connected to the energy storage vehicle battery system via a DC bus, the DC side of the power conversion device is connected to the DC bus, and the AC side is connected to the load; The second power supply module sends the converted direct current into the direct current bus and charges the battery system of the energy storage vehicle; The power conversion device converts the DC power of the DC bus into AC power to supply power to the load. During the power supply process, the power conversion device is in an inverter state.

5. The energy storage vehicle wiring system for realizing zero millisecond fault switching according to claim 1, characterized in that: The first power supply module, the second power supply module and the load end are all provided with a protection device, and the protection device is used to cut off the connection between the first power supply module, the second power supply module or the load end and the system.

6. The energy storage vehicle wiring system for realizing zero millisecond fault switching according to claim 5, characterized in that: The protection device comprises a circuit breaker.

7. A control method for achieving zero millisecond fault switching, characterized in that: The energy storage vehicle wiring system for realizing zero millisecond fault switching according to any one of claims 1 to 6 is implemented, comprising the following steps: In response to an AC power failure signal, the static switch is switched and the off-grid device is disconnected, so that the first power supply module stops supplying power to the load, and at the same time, the second power supply module stops supplying power to the load; The battery system of the energy storage vehicle is switched to a power supply state, and the load is directly powered by a power conversion device in an inverter state.

8. A computer device, characterized in that: The device comprises a processor and a memory: The memory is used to store a computer program and send instructions of the computer program to the processor; The processor executes the control method for implementing zero millisecond fault switching as claimed in claim 7 according to the instructions of the computer program.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the control method for realizing zero-millisecond fault switching as described in claim 7 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, a control method for implementing zero-millisecond fault switching as described in claim 7 is implemented.

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