Energy storage converter control method, device, equipment, medium and product

Abstract

The invention relates to the technical field of energy storage circuits, and discloses an energy storage converter control method, device and equipment, a medium and a product. An energy storage converter comprises a first bridge arm, a second bridge arm and a third bridge arm; the first bridge arm, the second bridge arm and the third bridge arm are respectively connected in parallel; the first bridge arm is electrically connected with the neutral point through the first relay; the second bridge arm is electrically connected with the neutral point through the second relay; the third bridge arm is electrically connected with the neutral point through a third relay; the method comprises the steps of obtaining a configuration mode of the energy storage converter; the configuration mode is used for indicating that the energy storage converter is in a three-phase mode, a split-phase mode or a single-phase mode; and controlling the working states of the first relay, the second relay and the third relay based on the configuration mode of the energy storage converter so as to control the working mode of the energy storage converter. According to the scheme, the application scenarios of the energy storage converter are increased, and the universality of a single energy storage converter is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage circuits, and in particular to a method, device, equipment, medium and product for controlling an energy storage converter. Background Art

[0002] A power storage converter (PCS) is a power electronic device that connects the battery system to the grid / load. It converts DC power into AC power for the grid or load, and also converts AC power into DC power to charge the battery. However, the DC-to-AC conversion process can involve a variety of scenarios. For example, the power in the PCS can be converted to three-phase voltage using three-phase voltage modulation, two-phase voltage using split-phase modulation, or single-phase voltage using single-phase modulation.

[0003] In the above solution, converting the electrical energy in the energy storage converter into voltages of different modes requires the use of energy storage converters with different circuit structures, which greatly limits the application scenarios of a single energy storage converter. Summary of the Invention

[0004] In view of this, the present invention provides a method, device, equipment, medium and product for controlling an energy storage converter, so as to increase the application scope of the energy storage converter.

[0005] In a first aspect, the present invention provides a method for controlling an energy storage converter, wherein the energy storage converter includes a first bridge arm, a second bridge arm, and a third bridge arm; the first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel; the first bridge arm is electrically connected to a neutral point via a first relay; the second bridge arm is electrically connected to the neutral point via a second relay; and the third bridge arm is electrically connected to the neutral point via a third relay;

[0006] The method comprises:

[0007] Acquire a configuration mode of the energy storage converter; the configuration mode is used to indicate whether the energy storage converter is in a three-phase mode, a split-phase mode, or a single-phase mode;

[0008] Based on the configuration mode of the energy storage converter, the operating states of the first relay, the second relay, and the third relay are controlled to control the operating mode of the energy storage converter.

[0009] In an optional implementation, controlling the working states of the first relay, the second relay, and the third relay based on the configuration mode of the energy storage converter includes:

[0010] When the configuration mode of the energy storage converter is a three-phase mode, the first relay, the second relay and the third relay are started, and the first relay is connected to the neutral point through the first load, the second relay is connected to the neutral point through the second load, and the third relay is connected to the neutral point through the third load, so that the energy storage converter operates in a three-phase mode.

[0011] In an optional implementation, controlling the working states of the first relay, the second relay, and the third relay based on the configuration mode of the energy storage converter includes:

[0012] When the configuration mode of the energy storage inverter is the split-phase mode, the first relay, the second relay and the third relay are controlled to start, and the first relay is connected to the neutral point through the fourth load, the third relay is connected to the neutral point through the fifth load, and the second relay is directly connected to the neutral point, so that the energy storage inverter operates in the split-phase mode.

[0013] In an optional implementation, controlling the working states of the first relay, the second relay, and the third relay based on the configuration mode of the energy storage converter includes:

[0014] When the configuration mode of the energy storage converter is single-phase mode, the first relay and the second relay are controlled to start, and the third relay is controlled to close, and the first relay is connected to the neutral point through the sixth load, and the second relay is directly connected to the neutral point, so that the energy storage converter operates in single-phase mode.

[0015] In an optional implementation, controlling the working states of the first relay, the second relay, and the third relay based on the configuration mode of the energy storage converter includes:

[0016] When the configuration mode of the energy storage converter is single-phase mode, the first relay and the second relay are controlled to start, and the third relay is controlled to close; the first relay is connected to the first end of the primary side of the transformer; the second relay is connected to the second end of the primary side of the transformer; the first end of the secondary side of the transformer is connected to the neutral point of the secondary side through the seventh load; the second end of the secondary side of the transformer is connected to the neutral point of the secondary side through the eighth load.

[0017] In an optional embodiment, the method further includes:

[0018] When a fault is detected in the second bridge arm, the second relay is disconnected and the third relay is activated.

[0019] In a second aspect, the present invention provides an energy storage converter control device, wherein the energy storage converter includes a first bridge arm, a second bridge arm, and a third bridge arm; the first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel; and the first bridge arm is electrically connected to the neutral point through a first relay; the second bridge arm is electrically connected to the neutral point through a second relay; and the third bridge arm is electrically connected to the neutral point through a third relay;

[0020] The device comprises:

[0021] A mode acquisition module, configured to acquire a configuration mode of the energy storage converter; the configuration mode is used to indicate whether the energy storage converter is in a three-phase mode, a split-phase mode, or a single-phase mode;

[0022] The working control module is used to control the working states of the first relay, the second relay and the third relay based on the configuration mode of the energy storage converter, so as to control the working mode of the energy storage converter.

[0023] In a third aspect, the present invention provides a computer device comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the energy storage converter control method of the second aspect or any corresponding embodiment thereof by executing the computer instructions.

[0024] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the above-mentioned energy storage converter control method.

[0025] In a fifth aspect, the present invention provides a computer program product, comprising computer instructions, which are used to enable a computer to execute the above-mentioned energy storage converter control method.

[0026] The technical solution provided by this application may have the following beneficial effects:

[0027] The energy storage converter in the present application includes a first bridge arm, a second bridge arm, and a third bridge arm; the first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel respectively; and the first bridge arm is electrically connected to the neutral point through a first relay; the second bridge arm is electrically connected to the neutral point through a second relay; and the third bridge arm is electrically connected to the neutral point through a third relay. At this time, during the operation of the energy storage converter, the configuration mode of the energy storage converter can be obtained, and then the conduction state of the first relay, the second relay, and the third relay can be selected according to the configuration mode, so as to control the energy storage converter to operate in three-phase mode, split-phase mode, or single-phase mode. The above scheme, based on the energy storage converter with three bridge arms, controls the working state of the three bridge arms through relays, so that the energy storage converter can operate in three-phase mode, split-phase mode, or single-phase mode respectively, which increases the application scenarios of the energy storage converter and improves the versatility of a single energy storage converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 is a structural diagram of an energy storage converter according to an exemplary embodiment;

[0030] Figure 2 A schematic structural diagram of a three-phase modulation energy storage converter according to an embodiment of the present application is shown;

[0031] Figure 3 A schematic structural diagram of an energy storage converter under split-phase modulation according to an embodiment of the present application is shown;

[0032] Figure 4 A schematic structural diagram of an energy storage converter under single-phase modulation according to an embodiment of the present application is shown;

[0033] Figure 5 A method flow chart of a method for controlling an energy storage converter according to an embodiment of the present application is shown;

[0034] Figure 6 A single-phase boost high-power topology diagram of an energy storage converter according to an embodiment of the present application is shown;

[0035] Figure 7 A topological diagram of a single-phase redundant control strategy for an energy storage converter according to an embodiment of the present application is shown;

[0036] Figure 8A control logic block diagram of an energy storage converter according to an embodiment of the present application is shown;

[0037] Figure 9 This is a structural block diagram of an energy storage converter control according to an embodiment of the present invention;

[0038] Figure 10 Schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0041] With the global demand for clean energy and efficient energy storage technologies continuing to rise, energy storage converters are finding widespread application in various fields. For example, they can be applied on the power generation side, where they smooth output power fluctuations in renewable energy plants like wind and photovoltaic power plants, improving the grid-connected capabilities of renewable energy sources. They can also be applied on the grid side, providing auxiliary services such as frequency regulation, peak shaving, and emergency backup, enhancing grid stability and reliability. They can also be applied to users, enabling peak-valley price arbitrage, self-generation for self-use, and emergency power supply, reducing electricity costs and improving energy efficiency. Furthermore, they can be applied to microgrids and off-grid systems. In remote areas or special locations, energy storage converters work in conjunction with local power generation equipment (such as photovoltaics and diesel engines) to create independent power supply systems.

[0042] The output operating types of energy storage inverters are mainly divided into single-phase, split-phase, and three-phase. Among them, single-phase energy storage inverters are suitable for household or small commercial loads, and the output is single-phase AC power to meet low power requirements; while three-phase energy storage inverters are suitable for high-power scenarios such as industrial and commercial, and the output is three-phase AC power, which can power large equipment. The "split-phase mode" of the energy storage inverter refers to its output voltage configuration as a dual-voltage system of 120V / 240V. In this mode, the center tap of the secondary winding of the transformer is grounded, forming two 120V voltages with a phase difference of 180 degrees. The voltage between these two 120V phases is 240V, so it can provide 120V and 240V power output simultaneously to meet the voltage requirements of different electrical appliances.

[0043] Although energy storage converters can operate in the various operating modes described above, each operating mode requires a corresponding output circuit to cooperate. Therefore, a single energy storage converter generally only operates in one operating mode, resulting in the converter being unable to cope with complex and changing application scenarios. To address the above issues, this application provides a control method for an energy storage converter, so that the converter can operate in different modes and output different types of voltages according to its configuration.

[0044] Figure 1 is a structural diagram of an energy storage converter according to an exemplary embodiment. Figure 1 The energy storage converter shown includes a first bridge arm, a second bridge arm, and a third bridge arm; the first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel; and the first bridge arm is electrically connected to the neutral point through a first relay K1; the second bridge arm is electrically connected to the neutral point through a second relay K2; and the third bridge arm is electrically connected to the neutral point through a third relay K3.

[0045] like Figure 1 As shown, the first bridge arm includes a first power switch tube Q1 and a second power switch tube Q2; the second bridge arm includes a third power switch tube Q3 and a fourth power switch tube Q4; the third bridge arm includes a fifth power switch tube Q5 and a sixth power switch tube Q6; V DC and C DC They are bus voltage and bus capacitance respectively; K1~K3 are main relays or contactors (that is, the first relay K1, the second relay K2 and the third relay K3).

[0046] like Figure 1 As shown, the neutral point is located at Figure 1 For example, the energy storage converter is used in three-phase modulation. Figure 2 , which shows a schematic structural diagram of a three-phase modulated energy storage converter according to an embodiment of the present application. Figure 2 As shown, the load module includes a first load R1, a second load R2, and a third load R3. The first relay K1 is connected to the neutral point N through the first load R1, the second relay K2 is connected to the neutral point N through the second load R2, and the third relay K3 is connected to the neutral point N through the third load R3. When the first relay K1, the second relay K2, and the third relay K3 are turned on, the energy storage converter can operate in three-phase modulation mode. Three-phase voltage modulation is typically based on a three-leg circuit topology and can operate in a bidirectional power flow mode in synchronization with the grid, and can also operate in an independent voltage source mode with load off the grid.

[0047] Please refer to Figure 3, which shows a schematic structural diagram of an energy storage converter under split phase modulation according to an embodiment of the present application. Figure 3 As shown, at this time, the first relay is connected to the neutral point N through the fourth load R4, the third relay is connected to the neutral point N through the fifth load R5, and the second relay is directly connected to the neutral point N. At this time, the energy storage converter only needs to turn on the first relay K1, the second relay K2 and the third relay K3 to make the energy storage converter work in the split-phase mode.

[0048] Please refer to Figure 4 , which shows a schematic structural diagram of an energy storage converter under single-phase modulation involved in an embodiment of the present application. Figure 4 As shown, the energy storage converter only includes the first bridge arm and the second bridge arm, and the first relay is connected to the second relay K2 through the sixth load R6. At this time, only the first relay K1 and the second relay K2 need to be started to put the energy storage converter into single-phase mode.

[0049] From the above analysis, it can be seen that energy storage converters in different modes need to adapt to different circuit structures. Therefore, this application provides an energy storage converter control method that can adapt to multi-scenario applications of three-phase, split-phase and single-phase, thereby improving the reusability and reliability of the system. Figure 5 FIG1 shows a method flow chart of a method for controlling an energy storage converter according to an embodiment of the present application. Figure 5 As shown, the method is executed by a controller of the energy storage converter, which may be a computer device, and the method includes:

[0050] Step 501: Acquire the configuration mode of the energy storage converter; the configuration mode is used to indicate whether the energy storage converter is in a three-phase mode, a split-phase mode, or a single-phase mode.

[0051] Step 502 : Based on the configuration mode of the energy storage converter, control the working states of the first relay, the second relay, and the third relay to control the working mode of the energy storage converter.

[0052] In one possible implementation, when the configuration mode of the energy storage converter is a three-phase mode, the first relay, the second relay, and the third relay are started, and the first relay is connected to the neutral point through the first load, the second relay is connected to the neutral point through the second load, and the third relay is connected to the neutral point through the third load, so that the energy storage converter operates in a three-phase mode.

[0053] The logic of the energy storage converter working in three-phase mode is shown in the instruction manual. Figure 2 The corresponding content will not be repeated here.

[0054] In another possible implementation, when the configuration mode of the energy storage inverter is the split-phase mode, the first relay, the second relay, and the third relay are controlled to start, and the first relay is connected to the neutral point through the fourth load, the third relay is connected to the neutral point through the fifth load, and the second relay is directly connected to the neutral point, so that the energy storage inverter operates in the split-phase mode.

[0055] When the energy storage converter is in three-phase mode or split-phase mode, although the first relay, the second relay and the third relay are all in the start-up state, the loads connected thereto are not the same. Therefore, in an embodiment of the present application, in order to implement the above solution, each bridge arm of the energy storage converter can be connected to a variety of different load circuits through a relay, so that the load circuit to be connected to can be determined by the conduction state of the relay, thereby determining which working mode to adopt.

[0056] In one possible implementation, when the configuration mode of the energy storage inverter is single-phase mode, the first relay K1 and the second relay K2 are controlled to start, and the third relay K3 is controlled to close, and the first relay K1 is connected to the neutral point N through the sixth load R6, and the second relay K2 is directly connected to the neutral point N, so that the energy storage inverter operates in single-phase mode.

[0057] When using the split-phase mode, the voltage level of 120V / 240V is generally configured on site, and the three-phase system voltage output is usually 400V. Taking into account the current limiting of the power tube, the performance of this topology cannot be fully utilized in the split-phase mode. Therefore, taking this into account, the single-phase boost mode is used in combination with a transformer, which can double the power utilization compared to the split-phase mode. Figure 6 The figure shows a single-phase boost high power topology diagram of an energy storage converter involved in an embodiment of the present application. Figure 6 As shown, in a possible implementation, when the configuration mode of the energy storage converter is single-phase mode, the first relay and the second relay are controlled to start, and the third relay is controlled to close; the first relay is connected to the first end of the primary side of the transformer; the second relay is connected to the second end of the primary side of the transformer; the first end of the secondary side of the transformer is connected to the neutral point of the secondary side through the seventh load; the second end of the secondary side of the transformer is connected to the neutral point of the secondary side through the eighth load.

[0058] When working in single-phase mode, an extra bridge arm can be used as a redundant bridge arm. When an open circuit fault occurs in Q3 or Q4, a new single-phase working circuit can be formed by cutting off the second relay K2 of the faulty bridge arm and enabling the relay of the redundant bridge arm, thereby ensuring the reliability of the system during single-phase operation. Figure 7 The topology diagram of a single-phase redundant control strategy of an energy storage converter according to an embodiment of the present application is shown. Figure 7As shown, when a fault is detected in the second bridge arm, the second relay K2 is disconnected and the third relay K3 is started. At this time, the third bridge arm serves as a redundant bridge arm. When a fault occurs in the second bridge arm, the third bridge arm forms a new single-phase working circuit through the third relay K3.

[0059] Optionally, the types of the above-mentioned Q1~Q6 switching devices include but are not limited to IGBT, silicon carbide, gallium nitride and other devices, K1~K3 are not limited to relays, contactors, etc., and the above-mentioned circuit topology is not limited to two-level, three-level, etc., and similarly, the various loads at the output end are not limited to load electrical appliances or power grids, etc.

[0060] Therefore, the overall logic of the above content can be found in Figure 8 , Figure 8 FIG1 shows a control logic block diagram of an energy storage converter according to an embodiment of the present application. Figure 8 As shown, when the energy storage converter starts to work, the controller first needs to determine whether the energy storage converter needs to use three-bridge arm modulation, that is, whether the energy storage converter is single-phase modulation.

[0061] If the energy storage converter is not single-phase modulated, the energy storage converter needs to use three-bridge arm modulation; at this time, the controller needs to further determine whether the energy storage converter is in three-phase mode; if it is not in three-phase mode, split-phase modulation can be performed according to the regional configuration requirements; if it is in three-phase mode, three-phase modulation can be performed according to the regional configuration requirements.

[0062] Furthermore, when the energy storage converter enters the split-phase mode, the controller can determine whether the energy storage converter needs to adopt the low-power mode. If it is determined to adopt the low-power mode, the split-phase modulation will continue; if the low-power mode is not adopted, it can be switched to the single-phase mode.

[0063] For single-phase mode, that is, when the three bridge arms are modulated in single phase according to the configuration requirements, it can be determined whether redundancy is enabled. If redundancy is enabled, it means that there is a fault in the bridge arm. At this time, the faulty bridge arm can be cut off and the redundant bridge arm can be enabled; if redundancy is not started, it means that there is no fault in the bridge arm. At this time, the single-phase bridge is normally enabled and the redundant bridge arm is in the cut-off state.

[0064] In summary, the energy storage converter in the present application includes a first bridge arm, a second bridge arm, and a third bridge arm; the first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel respectively; and the first bridge arm is electrically connected to the neutral point through a first relay; the second bridge arm is electrically connected to the neutral point through a second relay; and the third bridge arm is electrically connected to the neutral point through a third relay. At this time, during the operation of the energy storage converter, the configuration mode of the energy storage converter can be obtained, and then the conduction state of the first relay, the second relay, and the third relay can be selected according to the configuration mode, so as to control the energy storage converter to operate in three-phase mode, split-phase mode, or single-phase mode. The above scheme, based on the energy storage converter with three bridge arms, controls the working state of the three bridge arms through relays, so that the energy storage converter can operate in three-phase mode, split-phase mode, or single-phase mode respectively, which increases the application scenarios of the energy storage converter and improves the versatility of a single energy storage converter.

[0065] This embodiment also provides an energy storage converter control device for implementing the above-described embodiments and preferred implementations. Details already described will not be repeated. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[0066] This embodiment provides an energy storage converter control device, wherein the energy storage converter includes a first bridge arm, a second bridge arm, and a third bridge arm; the first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel; and the first bridge arm is electrically connected to the neutral point through a first relay; the second bridge arm is electrically connected to the neutral point through a second relay; and the third bridge arm is electrically connected to the neutral point through a third relay; Figure 9 As shown, the device includes:

[0067] A mode acquisition module 901 is configured to acquire a configuration mode of the energy storage converter; the configuration mode is configured to indicate whether the energy storage converter is in a three-phase mode, a split-phase mode, or a single-phase mode;

[0068] The working control module 902 is configured to control the working states of the first relay, the second relay, and the third relay based on the configuration mode of the energy storage converter, so as to control the working mode of the energy storage converter.

[0069] In one possible implementation, the working control module is used to: when the configuration mode of the energy storage inverter is a three-phase mode, start the first relay, the second relay and the third relay, and connect the first relay to the neutral point through the first load, the second relay to the neutral point through the second load, and the third relay to the neutral point through the third load, so that the energy storage inverter operates in a three-phase mode.

[0070] In one possible implementation, the working control module is used to: when the configuration mode of the energy storage inverter is the split-phase mode, control the first relay, the second relay to start, and the third relay to start, and connect the first relay to the neutral point through the fourth load, the third relay to the neutral point through the fifth load, and the second relay to the neutral point directly, so that the energy storage inverter operates in the split-phase mode.

[0071] In one possible implementation, the working control module is used to: when the configuration mode of the energy storage inverter is single-phase mode, control the first relay and the second relay to start, and the third relay to close, and connect the first relay to the neutral point through the sixth load and the second relay directly to the neutral point, so that the energy storage inverter operates in single-phase mode.

[0072] In one possible implementation, the working control module is used to: when the configuration mode of the energy storage converter is single-phase mode, control the first relay and the second relay to start, and the third relay to close; the first relay is connected to the first end of the primary side of the transformer; the second relay is connected to the second end of the primary side of the transformer; the first end of the secondary side of the transformer is connected to the neutral point of the secondary side through the seventh load; the second end of the secondary side of the transformer is connected to the neutral point of the secondary side through the eighth load.

[0073] In a possible implementation, the work control module is configured to:

[0074] When a fault is detected in the second bridge arm, the second relay is disconnected and the third relay is activated.

[0075] In summary, the energy storage converter in the present application includes a first bridge arm, a second bridge arm, and a third bridge arm; the first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel respectively; and the first bridge arm is electrically connected to the neutral point through a first relay; the second bridge arm is electrically connected to the neutral point through a second relay; and the third bridge arm is electrically connected to the neutral point through a third relay. At this time, during the operation of the energy storage converter, the configuration mode of the energy storage converter can be obtained, and then the conduction state of the first relay, the second relay, and the third relay can be selected according to the configuration mode, so as to control the energy storage converter to operate in three-phase mode, split-phase mode, or single-phase mode. The above scheme, based on the energy storage converter with three bridge arms, controls the working state of the three bridge arms through relays, so that the energy storage converter can operate in three-phase mode, split-phase mode, or single-phase mode respectively, which increases the application scenarios of the energy storage converter and improves the versatility of a single energy storage converter.

[0076] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0077] The device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0078] The embodiment of the present invention also provides a computer device having the above Figure 9 The energy storage converter control device shown.

[0079] See also Figure 10 , Figure 10 is a structural diagram of a computer device provided by an optional embodiment of the present invention, such as Figure 10 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components utilize different buses to communicate with each other and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of a GUI on an external input / output device (such as, a display device coupled to the interface). In an optional embodiment, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Equally, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 10 A processor 10 is taken as an example.

[0080] The processor 10 may be a central processing unit, a network processor, or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic, or any combination thereof.

[0081] The memory 20 stores instructions that can be executed by at least one processor 10, so as to enable at least one processor 10 to execute the method shown in the above embodiment.

[0082] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created based on the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In an optional embodiment, the memory 20 may optionally include a memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0083] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0084] The computer device further includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Figure 5 The bus connection is taken as an example.

[0085] The input device 30 can receive input digital or character information and generate key signal input related to the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a trackpad, a touch pad, an indicator stick, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 can include a display device, an auxiliary lighting device (e.g., an LED), and a tactile feedback device (e.g., a vibration motor). The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display, and a plasma display. In an optional embodiment, the display device can be a touch screen.

[0086] The embodiment of the present invention also provides a computer-readable storage medium. The above-mentioned method according to the embodiment of the present invention can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and downloaded through a network and will be stored in a local storage medium, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state drive, etc.; further, the storage medium can also include a combination of the above-mentioned types of memory. It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor or hardware, the method shown in the above embodiment is implemented.

[0087] A portion of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the form in which the computer program instruction exists in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc. Accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium that can be accessed by the computer.

[0088] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for controlling an energy storage converter, characterized in that: The energy storage converter includes a first bridge arm, a second bridge arm, and a third bridge arm; the first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel; and the first bridge arm is electrically connected to the neutral point through a first relay; The second bridge arm is electrically connected to the neutral point via a second relay; The third bridge arm is electrically connected to the neutral point via a third relay; The method comprises: Acquire a configuration mode of the energy storage converter; the configuration mode is used to indicate whether the energy storage converter is in a three-phase mode, a split-phase mode, or a single-phase mode; Based on the configuration mode of the energy storage converter, the operating states of the first relay, the second relay, and the third relay are controlled to control the operating mode of the energy storage converter.

2. The control method according to claim 1, characterized in that: The controlling the working states of the first relay, the second relay, and the third relay based on the configuration mode of the energy storage converter includes: When the configuration mode of the energy storage converter is a three-phase mode, the first relay, the second relay and the third relay are started, and the first relay is connected to the neutral point through the first load, the second relay is connected to the neutral point through the second load, and the third relay is connected to the neutral point through the third load, so that the energy storage converter operates in a three-phase mode.

3. The control method according to claim 1, wherein: The controlling the working states of the first relay, the second relay, and the third relay based on the configuration mode of the energy storage converter includes: When the configuration mode of the energy storage inverter is the split-phase mode, the first relay, the second relay and the third relay are controlled to start, and the first relay is connected to the neutral point through the fourth load, the third relay is connected to the neutral point through the fifth load, and the second relay is directly connected to the neutral point, so that the energy storage inverter operates in the split-phase mode.

4. The control method according to claim 3, characterized in that: The controlling the working states of the first relay, the second relay, and the third relay based on the configuration mode of the energy storage converter includes: When the configuration mode of the energy storage converter is single-phase mode, the first relay and the second relay are controlled to start, and the third relay is controlled to close, and the first relay is connected to the neutral point through the sixth load, and the second relay is directly connected to the neutral point, so that the energy storage converter operates in single-phase mode.

5. The control method according to claim 1, characterized in that: The controlling the working states of the first relay, the second relay, and the third relay based on the configuration mode of the energy storage converter includes: When the configuration mode of the energy storage converter is single-phase mode, the first relay and the second relay are controlled to start, and the third relay is controlled to close; the first relay is connected to the first end of the primary side of the transformer; the second relay is connected to the second end of the primary side of the transformer; the first end of the secondary side of the transformer is connected to the neutral point of the secondary side through the seventh load; the second end of the secondary side of the transformer is connected to the neutral point of the secondary side through the eighth load.

6. The control method according to claim 4 or 5, characterized in that: The method further comprises: When a fault is detected in the second bridge arm, the second relay is disconnected and the third relay is activated.

7. An energy storage converter control device, characterized in that: The energy storage converter includes a first bridge arm, a second bridge arm, and a third bridge arm; the first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel; and the first bridge arm is electrically connected to the neutral point through a first relay; The second bridge arm is electrically connected to the neutral point via a second relay; The third bridge arm is electrically connected to the neutral point via a third relay; The device comprises: A mode acquisition module, configured to acquire a configuration mode of the energy storage converter; the configuration mode is used to indicate whether the energy storage converter is in a three-phase mode, a split-phase mode, or a single-phase mode; The working control module is used to control the working states of the first relay, the second relay and the third relay based on the configuration mode of the energy storage converter, so as to control the working mode of the energy storage converter.

8. A computer device, characterized in that: include: The memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the energy storage converter control method according to any one of claims 1 to 6 by executing the computer instructions.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the energy storage converter control method according to any one of claims 1 to 6.

10. A computer program product, characterized in that The method comprises computer instructions, wherein the computer instructions are used to enable a computer to execute the energy storage converter control method according to any one of claims 1 to 6.

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