Power supply circuit and electronic equipment

Abstract

The invention discloses a power supply circuit and electronic equipment. The power supply circuit comprises an input module, an output module and a bidirectional converter module, the input module is connected with the at least two first switches and is used for exchanging energy with at least two-phase power grids, the at least two first switches are independently controlled, and the first switches are connected with the bidirectional converter module through corresponding transmission paths; the output module is connected to the corresponding transmission path through at least two second switches; and the bidirectional converter module comprises a direct current interface and is used for charging the direct current interface according to the electric energy of the power grid and / or supplying power to the corresponding transmission path based on the direct current interface. According to the technical scheme, normal power supply of the power supply circuit can still be achieved when the power grid is open-phase.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a power supply circuit and electronic equipment. Background Art

[0002] With the popularization of renewable energy and the rapid development of electronic technology, power systems require more flexible and efficient energy management solutions. PCS (Power Conversion System, energy storage converter) can achieve bidirectional flow of energy in different application scenarios through its rectification and inversion functions. In rectification mode, PCS converts AC power into DC power and receives grid energy to charge energy storage devices (such as batteries). This process is particularly important when power demand is low or electricity prices are low because it allows the system to store energy under the most economical conditions.

[0003] In the process of conceiving and implementing this application, the inventors found that there are at least the following problems: when the grid is out of phase, the switch between the grid and the PCS is disconnected at the same time, resulting in the inability to receive grid energy to charge the energy storage device, so that the PCS can only be in inverter mode to convert the DC power in the energy storage device into AC power to power the load. When the energy in the energy storage device is emptied, since the switch is disconnected at the same time, the energy storage device cannot be charged, and thus the load cannot be powered.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0005] The present application provides a power supply circuit and an electronic device, which are used to achieve normal power supply of the power supply circuit when a power grid loses a phase.

[0006] The present application provides a power supply circuit, including an input module, an output module and a bidirectional conversion module; the input module is connected to at least two first switches, and is used to exchange energy with at least a two-phase power grid, the at least two first switches are independently controlled, and the first switches and the bidirectional conversion module are connected through corresponding transmission paths; the output module is connected to the corresponding transmission path through at least two second switches; the bidirectional conversion module includes a DC interface, which is used to charge the DC interface according to the power of the power grid, and / or, to supply power to the corresponding transmission path based on the DC interface.

[0007] Optionally, the bidirectional conversion module includes at least two control circuits; each control circuit is connected to a corresponding transmission path, and the control circuit is connected to a DC interface; the control circuit is used to convert grid power into DC power to charge the DC interface, and / or to convert DC power into AC power to supply power to the corresponding transmission path.

[0008] Optionally, the control circuit includes a first power device and a second power device; one end of the first power device is connected to one end of the DC interface, and the other end of the first power device is connected to one end of the second power device and a first switch corresponding to the control circuit; the other end of the second power device is connected to the other end of the DC interface.

[0009] Optionally, the control circuit further includes an inductor; one end of the inductor is connected to the other end of the first power device, and the other end of the inductor is connected to the first switch corresponding to the control circuit.

[0010] Optionally, the bidirectional conversion module further includes a conversion interface corresponding to the control circuit; one end of the conversion interface is connected to the corresponding control circuit, and the other end of the conversion interface is connected to the first switch corresponding to the control circuit.

[0011] Optionally, the control circuit in addition to the neutral phase further includes a first capacitor; one end of the first capacitor is connected to the other end of the first power device, and the other end of the first capacitor is connected to the transmission path corresponding to the neutral phase.

[0012] Optionally, the bidirectional conversion module also includes a bidirectional transmission unit corresponding to the control circuit except the neutral phase; one end of the bidirectional transmission unit is connected to the DC interface, and the other end of the bidirectional transmission unit is connected to the transmission path corresponding to the control circuit; the bidirectional transmission unit is used to conduct the path from the transmission path to the DC interface, or, to conduct the path from the DC interface to the transmission path.

[0013] Optionally, the bidirectional transmission unit includes a third power device and a fourth power device; one end of the third power device is connected to the DC interface, and the other end of the third power device is connected to one end of the fourth power device; the other end of the fourth power device is connected to the transmission path corresponding to the control circuit.

[0014] Optionally, the bidirectional conversion module also includes a second capacitor and a third capacitor; one end of the second capacitor is connected to one end of the DC interface, and the other end of the second capacitor is connected to one end of the third capacitor, one end of the bidirectional transmission unit, and a transmission path corresponding to neutral; the other end of the third capacitor is connected to the other end of the DC interface.

[0015] The present application also provides an electronic device, comprising a power supply circuit as described above.

[0016] In the power supply circuit and electronic device provided by the present application, the power supply circuit includes an input module, an output module and a bidirectional conversion module; the input module is connected to at least two first switches for exchanging energy with at least two-phase power grids, at least two first switches are independently controlled, and the first switches and the bidirectional conversion modules are connected through corresponding transmission paths; the output module is correspondingly connected to the corresponding transmission path through at least two second switches; the bidirectional conversion module includes a DC interface for charging the DC interface according to the power of the power grid, and / or, supplying power to the corresponding transmission path based on the DC interface. In the scheme of the present application, a first switch is set under each phase, and through independent control of the first switch, when the power grid is missing a phase, only the first switch corresponding to the missing phase is disconnected, and the first switch corresponding to the non-missing phase is closed, and the DC interface is charged through the transmission path of the non-missing phase, thereby realizing normal power supply of the power supply circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0018] Figure 1 It is a structural diagram of PCS in a three-phase four-wire circuit;

[0019] Figure 2 A schematic diagram of the structure of a power supply circuit provided in the first embodiment of the present application;

[0020] Figure 3 A schematic diagram of a power supply circuit provided for this example;

[0021] Figure 4 A schematic diagram of a power supply circuit provided for this example;

[0022] Figure 5 A schematic diagram of the structure of a power supply circuit provided for this example.

[0023] The realization of the purpose, functional features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The above-mentioned drawings have shown clear embodiments of this application, which will be described in more detail later. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0024] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0025] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element. Optionally, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context in the specific embodiment.

[0026] It should be understood that, although the terms first, second, third, etc. may be used to describe various information in this article, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this article, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination". Furthermore, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising", "including" indicate the existence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or at least two other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or", "and / or", "including at least one of the following" etc. used in this application can be interpreted as inclusive, or mean any one or any combination. For example, “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”, and for another example, “A, B or C” or “A, B and / or C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”. An exception to this definition will only occur when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0027] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0028] It should be understood that the embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0030] In some power systems, PCS is the core component of the energy storage system, responsible for energy conversion between the power grid and the energy storage device. It can convert excess power into DC power for storage when power demand is low, and convert DC power into AC power when demand is high, and release it to the power grid while also supplying power to the load. Combined with a three-phase four-wire circuit, PCS can manage and distribute power more efficiently, ensuring a stable power supply under various load conditions. Figure 1 It is a schematic diagram of the structure of PCS in a three-phase four-wire circuit, as shown in Figure 1 As shown, Grid_L1, Grid_L2, Grid_L3 and Grid_N ports are connected to a multi-phase grid to receive multi-phase grid power. Grid_L1, Grid_L2, Grid_L3 and Grid_N ports are connected to the PCS through each corresponding transmission path, and a first switch is set on each transmission path. These first switches are simultaneously controlled by control1, so that these first switches are turned on and off at the same time. A second switch is also set on each transmission path and connected to Output_L1, Output_L2, Output_L3 and Output_N ports to output power. These second switches are simultaneously controlled by control2, and the DC interface of the PCS is connected to the energy storage device.

[0031] When the system is working normally, control1 controls all the first switches to be closed, control2 controls all the second switches to be closed, Grid_L1, Grid_L2, Grid_L3 and Grid_N ports receive multi-phase grid power, PCS converts the AC power of the multi-phase grid power into DC power and stores it in the energy storage device. At the same time, PCS converts the DC power in the energy storage device into AC power and sends it to the Output_L1, Output_L2, Output_L3 and Output_N ports to power the load, or to the Grid_L1, Grid_L2, Grid_L3 and Grid_N ports to feed the power into the grid and use grid-connected power generation.

[0032] However, in the case of a phase loss in the power grid, if the phase corresponding to the Grid_L1 port is lost, the first switch on the corresponding transmission path is disconnected. Since control1 controls all first switches, all first switches are disconnected, and the energy storage device cannot be charged. PCS can only convert the DC power in the energy storage device into AC power to supply power to the load through the Output_L1, Output_L2, Output_L3 and Output_N ports. When the energy in the energy storage device is completely discharged, it will no longer be able to supply power to the load.

[0033] The technical content provided by this application is intended to solve the above technical problems of related technologies. In an embodiment of the present application, the power supply circuit includes an input module, an output module and a bidirectional conversion module; the input module is connected to at least two first switches for exchanging energy with at least two-phase power grids, at least two first switches are independently controlled, and the first switch and the bidirectional conversion module are connected through corresponding transmission paths; the output module is connected to the corresponding transmission path through at least two second switches; the bidirectional conversion module includes a DC interface for charging the DC interface according to the power of the power grid, and / or, supplying power to the corresponding transmission path based on the DC interface. In the scheme of the present application, a first switch is set under each phase, and through independent control of the first switch, when the power grid is missing a phase, only the first switch corresponding to the missing phase is disconnected, and the first switch corresponding to the non-missing phase is closed, and the DC interface is charged through the transmission path without missing phase, thereby realizing normal power supply of the power supply circuit.

[0034] The technical solutions of the present application and the technical solutions of the present application are described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. In the description of the present application, unless otherwise clearly specified and limited, each term should be understood in a broad sense in the art. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0035] First embodiment

[0036] Figure 2 The structural schematic diagram of a power supply circuit provided by the first embodiment of the present application is as follows Figure 2 shown. The power supply circuit includes an input module 20, an output module 21, and a bidirectional power conversion module 22;

[0037] The input module 20 is connected to at least two first switches and is used to exchange energy with at least two-phase power grids. The at least two first switches are independently controlled, and a corresponding transmission path is connected between the first switch and the bidirectional power conversion module 22;

[0038] The output module 21 is connected to the corresponding transmission path through at least two second switches;

[0039] The bidirectional power conversion module 22 includes a DC interface, which is used to charge the DC interface according to the grid electric energy and / or supply power to the corresponding transmission path based on the DC interface.

[0040] In an embodiment, the power supply circuit includes three parts, namely an input module 20, an output module 21, and a bidirectional power conversion module 22. Optionally, the input module 20 is connected to at least two-phase power grids and is used to receive grid energy and feedback energy to the grid, so as to realize energy exchange with the grid.

[0041] In an embodiment, at least two first switches independently control at least two-phase power grids. Optionally, the input module 20 includes four grid ports, namely Grid_L1, Grid_L2, Grid_L3, and Grid_N. The input module 20 is connected to at least two first switches, and each first switch corresponds to one in the power grid and can be independently controlled. It can selectively connect or disconnect a specific power grid phase according to real-time power demand and grid conditions. This independent control ability can realize more efficient energy management and load balancing according to actual power demand and grid status. Optionally, at least two first switches are connected to the bidirectional power conversion module 22 through corresponding transmission paths and can perform energy transmission and conversion under different grid conditions.

[0042] Optionally, the output module 21 is connected to the corresponding transmission path through at least two second switches, ensuring efficient energy distribution and output. The design of these second switches also supports independent control and can flexibly adjust the output path according to load demand, further improving the response speed and adaptability.

[0043] In an embodiment, the output module 21 includes four output ports, namely Output_L1, Output_L2, Output_L3, and Output_N, and supplies power to the load through the four output ports.

[0044] Optionally, the bidirectional converter module 22 plays a vital role in the power supply circuit and has a powerful energy conversion capability. Its DC interface design enables the bidirectional converter module 22 to convert multi-phase AC power into DC power for storage when receiving power from the power grid. This function not only supports the energy demand of the circuit itself, but also stores energy when the power grid load is low, preparing for power supply during peak hours. The DC interface is connected to an energy storage device, and optionally, the energy storage device includes but is not limited to an energy storage battery, a rechargeable DC power supply, etc. Optionally, the bidirectional converter module 22 can also convert DC power into AC power, and supply power to the corresponding transmission path through the output module 21 and at least two second switches. Optionally, the bidirectional converter module 22 can be a PCS.

[0045] Optionally, when the circuit is working normally, at least two first switches are closed, the transmission path between the input module 20, the bidirectional conversion module 22 and the energy storage device is turned on, and the bidirectional conversion module 22 receives the AC grid energy, converts the AC grid energy into DC power and stores it in the energy storage device. Optionally, the bidirectional conversion module 22 converts the DC power in the energy storage device into AC power and feeds it back to the grid; at least two second switches are closed, the transmission path between the energy storage device, the bidirectional conversion module 22 and the output module 21 is turned on, and the bidirectional conversion module 22 converts the DC power in the energy storage device into AC power and outputs it through the output module 21 to power the load. When the grid encounters a phase loss, the first switch corresponding to the phase with the phase loss is disconnected. Since each first switch is controlled independently, the corresponding first switches of the remaining phases that are not missing are still closed, and the bidirectional conversion module 22 receives grid power through the corresponding transmission path of the phase that is not missing, converts the AC grid power into DC power to charge the energy storage device, and converts the DC power in the energy storage device into AC power and feeds it back to the grid. Optionally, the bidirectional conversion module 22 converts the DC power in the energy storage device into AC power to supply power to the load through the output module 21, thereby ensuring power supply to the load even when the grid is out of phase.

[0046] In one embodiment, a first switch is provided under each phase. By independently controlling the first switch, when a phase is missing in the power grid, only the first switch corresponding to the missing phase is disconnected, and the first switch corresponding to the non-missing phase is closed, and the DC interface is charged through the transmission path of the non-missing phase, thereby realizing normal power supply of the power supply circuit.

[0047] In one embodiment, Figure 3 This is a schematic diagram of a power supply circuit provided in this example. Figure 3 As shown, the power supply circuit further includes a control module 23; the control module 23 is connected to at least two first switches and at least two second switches, and is used to control the conduction states of the at least two first switches and at least two second switches.

[0048] In one embodiment, the control module 23 is one of the core components in the power supply circuit, responsible for coordinating and managing the overall operation of the circuit. By connecting with at least two first switches and at least two second switches, the control module 23 can accurately control the conduction state of these switches, thereby realizing dynamic management of power flow. In the input module 21, the control module 23 can selectively close or open a first switch according to real-time grid conditions and load requirements. When a phase of the grid fails, the control module 23 can quickly adjust the switch state to ensure the continuous and stable operation of the circuit.

[0049] Optionally, in the output module 21, the control module 23 also plays a key role, and can flexibly distribute electrical energy to various transmission paths by controlling the conduction state of at least two second switches. This control not only supports the efficient distribution of electricity, but also can respond quickly according to changes in demand and optimize the use and storage of electrical energy. Optionally, the control module 23 can also perform an intelligent monitoring and feedback mechanism, which can collect circuit operation data in real time and adjust the switch operation strategy based on this data.

[0050] In one embodiment, by providing a control module in the power supply circuit to monitor the state of the power grid in real time, the switch state can be quickly adjusted when a power grid failure occurs, thereby improving the stability of the circuit.

[0051] In one embodiment, the bidirectional conversion module 22 includes at least two control circuits; each control circuit is connected to a corresponding transmission path, and the control circuit is connected to a DC interface; the control circuit is used to convert grid power into DC power to charge the DC interface, and / or to convert DC power into AC power to power the corresponding transmission path.

[0052] In one embodiment, the internal structure of the bidirectional converter module 22 includes at least two control circuits. These control circuits are not only connected to their respective corresponding transmission paths, but also directly connected to the DC interface. Each control circuit is designed to achieve efficient energy conversion and management, ensuring seamless conversion between AC and DC as needed. When the input module 20 receives AC power from the power grid, the control circuit is responsible for converting the AC power into DC power and storing it in an energy storage device connected to the DC interface. When it is necessary to supply power to the load or the power grid, the control circuit performs its reverse conversion function. Optionally, the control circuit converts the DC power in the energy storage device connected to the DC interface into AC power and supplies power to the load through the transmission path. The independence of each control circuit enables the circuit to flexibly and selectively supply power to a specific phase or load according to actual needs. This flexibility not only improves the response speed, but also enhances its ability to adapt to different load conditions and power grid conditions.

[0053] Optionally, the specific implementation structure of the control circuit is not limited. Optionally, the control circuit includes a first power device and a second power device; one end of the first power device is connected to one end of the DC interface, the other end of the first power device is connected to one end of the second power device and a first switch corresponding to the control circuit; the other end of the second power device is connected to the other end of the DC interface.

[0054] In one embodiment, the core components of the control circuit include a first power device and a second power device. The first power device and the second power device include, but are not limited to, IGBT (Insulate-Gate Bipolar Transistor), MOS tube, etc. These power devices are responsible for realizing efficient conversion and transmission of electric energy. Optionally, one end of the first power device is directly connected to one end of the DC interface. This connection ensures that the DC power can directly enter the control circuit for processing. The other end of the first power device is connected to one end of the second power device, and is also connected to the first switch corresponding to the control circuit. This connection method enables the control circuit to perform preliminary rectification and regulation through the first power device when receiving AC power from the power grid, and convert the AC power into DC power so as to charge the DC interface.

[0055] Optionally, the other end of the second power device is connected to the other end of the DC interface, forming a complete power conversion loop. When it is necessary to convert DC power into AC power for power supply, the second power device plays its role. By working in conjunction with the first power device, the second power device can effectively invert DC power into AC power and supply power to the load through a transmission path. This process involves complex inversion technology to ensure that the output AC power has stable voltage and frequency characteristics. Through the scheme of this example, the control circuit can not only realize bidirectional energy conversion, but also flexibly adjust the flow of electric energy according to real-time needs. This flexibility and high efficiency enable the power supply circuit to maintain stable operation under various working conditions, while improving the energy utilization efficiency and reliability of the entire system.

[0056] In one embodiment, the control circuit further includes an inductor; one end of the inductor is connected to the other end of the first power device, and the other end of the inductor is connected to the first switch corresponding to the control circuit.

[0057] Optionally, in the design of the control circuit, the introduction of the inductor is to optimize the current characteristics during the power conversion process and further improve the performance and stability of the system. One end of the inductor is connected to the other end of the first power device, and the other end of the inductor is connected to the first switch corresponding to the control circuit. This connection mode enables the inductor to play a key regulating role in the current path. In the process of the alternating current energy being rectified into direct current energy by the first power device, the inductor effectively smoothes the current waveform through its electromagnetic characteristics and reduces the pulsation of the current. Optionally, when the current passes through the inductor, the inductor stores energy in its magnetic field and releases it when the current changes. This characteristic enables the inductor to provide additional energy support when the current demand fluctuates, ensuring the stable operation of the system. In the inversion process, the inductor also plays an important role. By working in coordination with the first power device and the second power device, the inductor helps to adjust the current characteristics of the inverter output, so that the output AC power has better voltage and frequency characteristics. Through the scheme of this example, not only the energy conversion efficiency of the system is improved, but also the adaptability to load changes is enhanced, ensuring that the power supply circuit can maintain efficient and stable operation under various working conditions.

[0058] In one embodiment, the bidirectional converter module 22 further includes a conversion interface corresponding to the control circuit; one end of the conversion interface is connected to the corresponding control circuit, and the other end of the conversion interface is connected to the first switch corresponding to the control circuit.

[0059] Optionally, in the design of the bidirectional converter module 22, the introduction of the conversion interface further enhances the flexibility and functionality of the system. One end of the conversion interface is connected to the corresponding control circuit, and this connection ensures that the control circuit can directly exchange electric energy with the conversion interface. The other end of the conversion interface is connected to the first switch corresponding to the control circuit. The main function of the conversion interface is to provide a flexible connection point so as to achieve fast switching and optimized control in different working modes. In the process of receiving AC power from the power grid and converting it into DC power, the conversion interface ensures that the power can be transmitted to the DC interface for storage with minimal loss and the highest efficiency through close cooperation with the control circuit. Conversely, when it is necessary to convert DC power into AC power for power supply, the conversion interface also plays a key role, and through the connection with the first switch, it is ensured that the inverted AC power can be smoothly output to the corresponding transmission path. Through the scheme of this example, the conversion interface not only improves the response speed of the system, but also enhances its adaptability to different power demands and power grid conditions.

[0060] In one embodiment, the control circuit in addition to the neutral phase further includes a first capacitor; one end of the first capacitor is connected to the other end of the first power device, and the other end of the first capacitor is connected to the transmission path corresponding to the neutral phase.

[0061] Optionally, in each control circuit except the neutral phase, one end of the first capacitor is connected to the other end of the first power device, and the other end is connected to the transmission path corresponding to the neutral phase. This connection mode enables the first capacitor to effectively perform a filtering function in the circuit. When AC power is rectified into DC power, the capacitor can smooth voltage fluctuations and reduce voltage ripples through its charge storage capacity.

[0062] Optionally, the connection of the first capacitor to the neutral phase helps to achieve voltage balance in a multi-phase system. Since the phases may have voltage differences due to load imbalance or other factors, the first capacitor can adjust the voltage between the phases through its charge transfer characteristics to ensure the uniformity and stability of the voltage of each phase. This voltage balancing function is crucial to the stable operation of the entire system, especially under complex load conditions, and can effectively prevent system failures or reduced efficiency due to voltage imbalance.

[0063] In one embodiment, the bidirectional conversion module 22 also includes a bidirectional transmission unit corresponding to the control circuit except the neutral phase; one end of the bidirectional transmission unit is connected to the DC interface, and the other end of the bidirectional transmission unit is connected to the transmission path corresponding to the control circuit; the bidirectional transmission unit is used to conduct the path from the transmission path to the DC interface, or, to conduct the path from the DC interface to the transmission path.

[0064] Optionally, in the design of the bidirectional conversion module 22, each control circuit except the neutral phase is equipped with a corresponding bidirectional transmission unit, which plays a key role in the bidirectional flow of electric energy. One end of the bidirectional transmission unit is connected to the DC interface, which ensures that the electric energy can be efficiently stored or released in the form of DC. The other end is connected to the transmission path of the corresponding control circuit. This configuration enables the bidirectional transmission unit to perform flexible energy conversion between AC and DC. The main function of the bidirectional transmission unit is to conduct the flow path of electric energy in different directions according to system requirements. When it is necessary to transmit electric energy from the transmission path to the DC interface, the bidirectional transmission unit conducts the corresponding path so that the AC electric energy can be rectified and stored in the DC interface. This process usually occurs when there is excess power in the power grid or energy storage is required. Conversely, when the system needs to release the electric energy in the DC interface to the transmission path, the bidirectional transmission unit conducts the corresponding path and inverts the DC electric energy into AC electric energy to meet the load demand or feed back electric energy to the power grid.

[0065] Optionally, the bidirectional transmission unit includes a third power device and a fourth power device; one end of the third power device is connected to the DC interface, and the other end of the third power device is connected to one end of the fourth power device; the other end of the fourth power device is connected to the transmission path corresponding to the control circuit. Optionally, the third power device and the fourth power device include but are not limited to IGBT, MOS tube, etc. This configuration allows electric energy to flow efficiently in both directions between the DC interface and the transmission path. When transmitting electric energy from the transmission path to the DC interface, the third power device and the fourth power device work together to rectify the AC power into DC power for storage. Optionally, when the DC power needs to be released to the transmission path, the two power devices perform corresponding operations to invert the DC power into AC power to meet the output requirements of the system. Through the scheme of this example, not only the energy utilization efficiency of the system is improved, but also its adaptability to changes in power demand is enhanced, and the stability and reliability of the power supply circuit are improved.

[0066] Optionally, the bidirectional conversion module 22 also includes a second capacitor and a third capacitor; one end of the second capacitor is connected to one end of the DC interface, and the other end of the second capacitor is connected to one end of the third capacitor, one end of the bidirectional transmission unit, and a transmission path corresponding to neutral; the other end of the third capacitor is connected to the other end of the DC interface.

[0067] Optionally, in the design of the bidirectional converter module 22, the introduction of the second capacitor and the third capacitor further optimizes the power management and stability of the system. One end of the second capacitor is connected to one end of the DC interface, and the other end is connected to one end of the third capacitor, one end of the bidirectional transmission unit and the transmission path corresponding to the neutral phase. This configuration enables the second capacitor to play a key voltage stabilization and filtering role in the entire circuit. Through the connection with the DC interface, the second capacitor can smooth the DC voltage, reduce voltage fluctuations, and thus improve the quality of DC power. Optionally, the connection of the second capacitor to the neutral phase transmission path helps to achieve a balanced distribution of voltage in a multi-phase system and ensure voltage consistency between phases.

[0068] Optionally, the other end of the third capacitor is connected to the other end of the DC interface to form a complete capacitor network. The third capacitor works together with the second capacitor to further enhance the system's ability to store and release electrical energy. During the power conversion process, the third capacitor, through its charge storage characteristics, can provide additional energy support when the current demand fluctuates, ensuring the stable operation of the system. Through this refined capacitor design, solid support is provided for the reliability and performance of the entire power supply circuit system.

[0069] In the power supply circuit provided in this embodiment, the power supply circuit includes an input module, an output module and a bidirectional conversion module; the input module is connected to at least two first switches for exchanging energy with at least two-phase power grids, at least two first switches are independently controlled, and the first switches and the bidirectional conversion modules are connected through corresponding transmission paths; the output module is correspondingly connected to the corresponding transmission path through at least two second switches; the bidirectional conversion module includes a DC interface for charging the DC interface according to the power of the power grid, and / or, supplying power to the corresponding transmission path based on the DC interface. In the scheme of the present application, a first switch is set under each phase, and through independent control of the first switch, when the power grid is missing a phase, only the first switch corresponding to the missing phase is disconnected, and the first switch corresponding to the non-missing phase is closed, and the DC interface is charged through the transmission path of the non-missing phase, thereby realizing normal power supply of the power supply circuit.

[0070] Second embodiment

[0071] Figure 4 This is a schematic diagram of a power supply circuit provided in this example. Figure 4 As shown, the power supply circuit in this example is a three-phase four-wire circuit.

[0072] Optionally, the input module may include: four grid ports Grid_L1, Grid_L2, Grid_L3, and Grid_N; and first switches R1, R2, R3, and R4 provided on the transmission paths where the respective ports are located.

[0073] Optionally, the output module may include: four output ports, Output_L1, Output_L2, Output_L3, and Output_N; and second switches R5, R6, and R7 provided on the transmission paths except the neutral phase where the ports are located;

[0074] Optionally, the bidirectional conversion module may include: four corresponding control circuits, wherein the first corresponding transmission path includes IGBT Q4, Q8, inductor L4, first capacitor C3, and conversion interface INV_L1; the second corresponding transmission path includes IGBT Q3, Q7, inductor L3, first capacitor C2, and conversion interface INV_L2; the third corresponding transmission path includes IGBTQ2, Q6, inductor L2, first capacitor C1, and conversion interface INV_L3; the neutral corresponding transmission path includes IGBT Q1, Q5, inductor L1, and conversion interface N.

[0075] Optionally, the DC interface may include: a positive pole and a negative pole.

[0076] Optionally, when the system is working normally, the control unit controls R1, R2, R3, R4, R5, R6, and R7 to be all closed, and the Grid_L1, Grid_L2, Grid_L3, and Grid_N ports receive multi-phase grid power, and the bidirectional conversion module converts the AC power of the multi-phase grid power into DC power and stores it in the energy storage device through the DC interface. Optionally, the bidirectional conversion module converts the DC power in the energy storage device into AC power and sends it to the Output_L1, Output_L2, Output_L3, and Output_N ports to power the load, or to the Grid_L1, Grid_L2, Grid_L3, and Grid_N ports to feed the power into the grid and use grid-connected power generation.

[0077] Optionally, in the case of a phase loss in the power grid, optionally, if the Grid_L1 port is phase-lost, the control module controls R1 to be disconnected, controls R2, R3, R4 to remain closed, and controls R5, R6, R7 to remain closed.

[0078] In one embodiment, the Grid_L1 port-R1-INV_L1-bidirectional converter module-DC interface path is disconnected, and the phase cannot charge the energy storage device. The bidirectional converter module operates in the inverter mode (discharge) in this phase, and converts DC power into AC power through the DC interface-bidirectional converter module-INV_L1-R5-Output_L1 to power the load.

[0079] In one embodiment, the Grid_L2 port-R2-INV_L2-bidirectional conversion module-DC interface and the Grid_L3 port R3-INV_L3-bidirectional conversion module-DC interface paths are turned on, and the two phases convert grid power into DC power to charge the energy storage device, and at the same time convert DC power into AC power on these two phases to power the load.

[0080] Optionally, the power supply circuit can refer to the content of the aforementioned embodiment. In summary, the power supply circuit provided in this example is provided with a first switch under each phase, and through independent control of the first switch, when the power grid is missing a phase, only the first switch corresponding to the missing phase is disconnected, and the first switch corresponding to the non-missing phase is closed, and the DC interface is charged through the transmission path of the non-missing phase, thereby realizing normal power supply of the power supply circuit.

[0081] Third embodiment

[0082] Based on any of the above embodiments, Figure 5 This is a schematic diagram of a power supply circuit provided in this example. Figure 5 As shown, the explanation is as follows: the power supply circuit in this example is a three-phase four-wire circuit, and the input module includes four grid ports Grid_L1, Grid_L2, Grid_L3 and Grid_N, which are used to receive multi-phase grid power.

[0083] Optionally, a corresponding first switch R1 is set on the transmission path where the Grid_L1 port is located, a corresponding first switch R2 is set on the transmission path where the Grid_L2 port is located, a corresponding first switch R3 is set on the transmission path where the Grid_L3 port is located, and a corresponding first switch R4 is set on the transmission path where the Grid_N port is located, and R1, R2, R3, and R4 are independently controlled by the control module; the output module includes four output ports, Output_L1, Output_L2, Output_L3, and Output_N, for outputting electric energy to the load; a corresponding second switch R5 is set on the transmission path where the Output_L1 port is located, a corresponding second switch R6 is set on the transmission path where the Output_L2 port is located, and a corresponding second switch R7 is set on the transmission path where the Output_L3 port is located, and R5, R6, and R7 are controlled by the control module; the bidirectional conversion module includes four corresponding control Circuit, the first corresponding transmission path includes two IGBTs Q4 and Q8, an inductor L4, a first capacitor C3, a bidirectional transmission unit composed of two IGBTs Q9 and Q10, and a conversion interface INV_L1 corresponding to the corresponding control circuit, the second corresponding transmission path includes two IGBTs Q3 and Q7, an inductor L3, a first capacitor C2, a bidirectional transmission unit composed of two IGBTs Q11 and Q12, and a conversion interface INV_L2 corresponding to the corresponding control circuit, the third corresponding transmission path includes two IGBTs Q2 and Q6, an inductor L2, a first capacitor C1, a bidirectional transmission unit composed of two IGBTs Q13 and Q14, and a conversion interface INV_L3 corresponding to the corresponding control circuit, the neutral corresponding transmission path includes two IGBTs Q1 and Q5, an inductor L1, and a conversion interface N corresponding to the corresponding control circuit; a second capacitor C4; a third capacitor C5; a DC interface includes a positive electrode and a negative electrode connected to an energy storage device.

[0084] Optionally, when the system is working normally, the control unit controls R1, R2, R3, R4, R5, R6, and R7 to be all closed, and the Grid_L1, Grid_L2, Grid_L3, and Grid_N ports receive multi-phase grid power. The bidirectional conversion module converts the AC power of the multi-phase grid power into DC power and stores it in the energy storage device through the DC interface. At the same time, the bidirectional conversion module 22 converts the DC power in the energy storage device into AC power, and sends it to the Output_L1, Output_L2, Output_L3, and Output_N ports to power the load, or to the Grid_L1, Grid_L2, Grid_L3, and Grid_N ports to feed the power into the grid and use grid-connected power generation.

[0085] Optionally, in the case of a phase loss in the power grid, optionally, if the Grid_L1 port is phase-lost, the control module controls R1 to be disconnected, and controls R2, R3, and R4 to remain closed.

[0086] In one embodiment, when the power of the energy storage device is greater than the first power threshold, the three phases of the bidirectional converter module only operate in the inverter mode (discharging), only discharging but not charging, and the control module controls R5, R6, and R7 to be closed at the same time, and the grid power and the energy storage device power the load.

[0087] In one embodiment, when the power of the energy storage device is less than the first power threshold, the three phases of the bidirectional converter module only operate in the rectification mode (charging), only charging but not discharging. At this time, the control module controls R5 to be disconnected, R6 and R7 to be closed, and the grid power charges the energy storage device through R2, R3 and R4, and the grid power supplies power to the load through R6 and R7.

[0088] Optionally, the power supply circuit can refer to the content of the aforementioned embodiment. In summary, the power supply circuit provided in this example is provided with a first switch under each phase, and through independent control of the first switch, when the power grid is missing a phase, only the first switch corresponding to the missing phase is disconnected, and the first switch corresponding to the non-missing phase is closed, and the DC interface is charged through the transmission path of the non-missing phase, thereby realizing normal power supply of the power supply circuit.

[0089] The present application also provides an electronic device, which includes the power supply circuit in any of the above embodiments. The power supply circuit has been described in detail in the above embodiments and will not be repeated here.

[0090] Optionally, the electronic device can be an energy storage inverter. During normal operation, the energy storage inverter receives multi-phase grid power through an input module (i.e., a grid port), rectifies it into direct current through a bidirectional conversion module and stores it in the energy storage device. At the same time, the direct current is inverted into alternating current to power the load or feed it into the grid. When a phase failure occurs in the grid, only the first switch corresponding to the failure is disconnected, while the switches of other phases are kept working normally, and the energy storage device continues to be charged through the transmission path of the non-faulty phase, and the load is powered to ensure stable operation of the system. The control circuit in the bidirectional conversion module, including power devices, inductors, and capacitors, can efficiently realize the bidirectional flow and conversion of electric energy while optimizing the quality of electric energy.

[0091] It is understood that the above scenarios are only examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of the present application. The technical solutions of the present application can also be applied to other scenarios. For example, it is known to those skilled in the art that with the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0092] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0093] The units in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0094] In the present application, the same or similar terminology concepts, technical solutions and / or application scenario descriptions are generally described in detail only the first time they appear. When they appear again later, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of the present application, for the same or similar terminology concepts, technical solutions and / or application scenario descriptions that are not described in detail later, reference can be made to the previous related detailed descriptions.

[0095] In the present application, 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] The various technical features of the technical solution of the present application can be arbitrarily combined. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0097] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A power supply circuit, characterized in that: It includes an input module, an output module and a bidirectional conversion module; The input module is connected to at least two first switches for exchanging energy with at least two-phase power grids, the at least two first switches are independently controlled, and the first switches are connected to the bidirectional conversion module via corresponding transmission paths; The output module is connected to the corresponding transmission path through at least two second switches; The bidirectional conversion module includes a DC interface, which is used to charge the DC interface according to grid power and / or to supply power to a corresponding transmission path based on the DC interface.

2. The power supply circuit according to claim 1, characterized in that: The bidirectional conversion module includes at least two control circuits; Each of the control circuits is connected to a corresponding transmission path, and the control circuit is connected to the DC interface; The control circuit is used to convert the grid power into DC power to charge the DC interface, and / or to convert the DC power into AC power to supply power to the corresponding transmission path.

3. The power supply circuit according to claim 2, characterized in that: The control circuit includes a first power device and a second power device; One end of the first power device is connected to one end of the DC interface, and the other end of the first power device is connected to one end of the second power device and a first switch corresponding to the control circuit; The other end of the second power device is connected to the other end of the DC interface.

4. The power supply circuit according to claim 3, characterized in that: The control circuit also includes an inductor; One end of the inductor is connected to the other end of the first power device, and the other end of the inductor is connected to a first switch corresponding to the control circuit.

5. The power supply circuit according to any one of claims 2 to 4, characterized in that: The bidirectional conversion module also includes a conversion interface corresponding to the control circuit; One end of the conversion interface is connected to the corresponding control circuit, and the other end of the conversion interface is connected to the first switch corresponding to the control circuit.

6. The power supply circuit according to claim 3 or 4, characterized in that: The control circuit includes a first capacitor in addition to the neutral phase; One end of the first capacitor is connected to the other end of the first power device, and the other end of the first capacitor is connected to the transmission path corresponding to the neutral.

7. The power supply circuit according to any one of claims 2 to 4, characterized in that: The bidirectional conversion module also includes a bidirectional transmission unit corresponding to the control circuit except for the neutral phase; One end of the bidirectional transmission unit is connected to the DC interface, and the other end of the bidirectional transmission unit is connected to a transmission path corresponding to the control circuit; The bidirectional transmission unit is used to conduct a path from the transmission path to the DC interface, or to conduct a path from the DC interface to the transmission path.

8. The power supply circuit according to claim 7, characterized in that: The bidirectional transmission unit includes a third power device and a fourth power device; One end of the third power device is connected to the DC interface, and the other end of the third power device is connected to one end of the fourth power device; The other end of the fourth power device is connected to a transmission path corresponding to the control circuit.

9. The power supply circuit according to claim 7, characterized in that: The bidirectional conversion module also includes a second capacitor and a third capacitor; One end of the second capacitor is connected to one end of the DC interface, and the other end of the second capacitor is connected to one end of the third capacitor, one end of the bidirectional transmission unit, and the transmission path corresponding to the neutral; The other end of the third capacitor is connected to the other end of the DC interface.

10. An electronic device, characterized in that: The invention comprises a power supply circuit as claimed in any one of claims 1 to 9.

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