Multi-port AC / DC multiplexing power supply device

Abstract

The invention provides a multi-port alternating current and direct current multiplexing power supply device. Through the dynamic switching of the AC / DC multiplexing interface module and the collaborative architecture of the multi-port DC interconnector module, the intelligent reconstruction of a hardware circuit and the flexible configuration of an energy path are realized. The AC / DC multiplexing interface module automatically switches an AC rectification / inversion mode or a DC buck-boost mode according to the power distribution type, thereby solving the limitation that a conventional device only supports a single type of port. The multi-port direct-current interconnector module establishes a reconfigurable energy path through a switching signal driven by hierarchical logic, so that the voltage conversion range is expanded while the transmission loss is reduced. Multi-mode operation intervals are divided in real time in an actual application scene, energy supply of high-priority ports is guaranteed preferentially, power decoupling is achieved through the inductor energy storage characteristic, the problems in the aspects of voltage gain and transmission power in a traditional scheme are solved, and the light-weight and high-compatibility power supply device is formed.

Description

Technical Field

[0001] The present application relates to the field of power electronics, and in particular to a multi-port AC / DC multiplexing power supply device. Background Art

[0002] Power electronics-based interconnection devices, namely power electronic transformers, usually use a common DC bus or a common AC bus to interconnect multiple ports to meet the energy supply needs of multiple voltage levels.

[0003] However, power electronic transformers based on a common DC bus suffer from insufficient voltage gain in single-stage converters and a narrow voltage conversion range. In particular, there is a conflict between voltage gain and transmission power. Power electronic transformers based on a common high-frequency AC bus are more suitable for DC ports, DC power sources, and loads. For AC ports, at least two-stage converters are required, which increases costs and reduces efficiency. Furthermore, high-frequency AC transformers with large transformation ratios have large parasitic capacitances, which seriously affect the stable operation of power electronic transformers. Furthermore, power electronic transformers based on a common DC bus can only connect to a single DC or AC bus, and can only serve a single type of equipment. AC / DC multiplexing is not possible, significantly reducing the flexibility of the equipment.

[0004] Therefore, in view of the development of diversified new energy and new business formats, there is an urgent need for a multi-port AC / DC multiplexing power supply device and a corresponding power supply method to meet the flexible and diverse AC / DC multiplexing ports and achieve a wide input range and high efficiency and high voltage transformation ratio. Summary of the Invention

[0005] The purpose of this application is to solve at least one of the above-mentioned technical defects, especially the technical defects of the existing power supply circuit such as insufficient performance and poor universality.

[0006] In a first aspect, the present application provides a multi-port AC / DC multiplexing power supply device, the device comprising:

[0007] Multiple AC / DC multiplexing interface modules, each of which is configured to dynamically switch to an AC rectifier / inverter circuit or a DC buck-boost circuit according to the power distribution type of the access port;

[0008] A multi-port DC interconnector module comprises a plurality of power switching devices and a common DC bus, wherein each of the power switching devices is used to connect an AC / DC multiplexing interface module to the common DC bus.

[0009] As an optional implementation, the AC / DC multiplexing interface module includes:

[0010] Power distribution port, used to connect to external DC bus or AC bus;

[0011] First to sixth switching tubes, each comprising a combination of a three-terminal transistor and a diode, wherein in the same switching tube, the first terminal of the three-terminal transistor is idle, the second terminal of the three-terminal transistor is connected to the cathode of the diode, forming the first terminal of the corresponding switching tube, and the third terminal of the three-terminal transistor is connected to the anode of the diode, forming the second terminal of the corresponding switching tube;

[0012] In addition, the first end of the first switching tube and the second end of the fourth switching tube are connected to form a first phase circuit, and a first inductor is connected between the connection point of the first end of the first switching tube and the second end of the fourth switching tube and the power distribution port; the first end of the second switching tube and the second end of the fifth switching tube are connected to form a second phase circuit, and a second inductor is connected between the connection point of the first end of the second switching tube and the second end of the fifth switching tube and the power distribution port; the first end of the third switching tube and the second end of the sixth switching tube are connected to form a third phase circuit, and a third inductor is connected between the connection point of the first end of the third switching tube and the second end of the sixth switching tube and the power distribution port; the first ends of the fourth switching tube, the fifth switching tube and the sixth switching tube are connected, and connected to the first end of the first capacitor, and the second ends of the first switching tube, the second switching tube and the third switching tube are connected, and connected to the second end of the first capacitor.

[0013] As an optional implementation manner, the device forms a corresponding AC processing unit or DC processing unit by multiplexing the first to sixth switching tubes according to the type of bus connected to the power distribution port;

[0014] The AC processing unit includes: if the power distribution port is connected to an external AC bus, configuring the first to sixth switching tubes into a three-phase full-bridge circuit as the AC rectification / inversion circuit to perform AC rectification or inversion operations;

[0015] The DC processing unit includes: if the power distribution port is connected to an external DC bus, the first to sixth switching tubes are configured as a three-phase staggered parallel Buck / Boost conversion circuit as the DC buck-boost circuit to perform DC buck-boost conversion.

[0016] As an optional implementation manner, the driving logic of each power switch device in the multi-port DC interconnector module includes:

[0017] Determining a first switch, a middle switch, and a last switch according to the topological positions of the power switching devices;

[0018] Determining a plurality of different duty cycles according to the number of the power switching devices, and generating a first modulation signal corresponding to the first switch, a second modulation signal corresponding to the last switch, and intermediate modulation signals corresponding to each of the intermediate switches according to the corresponding duty cycles;

[0019] According to the first modulation signal, the driving signal of the first switch is determined; according to the inverted signal of the second modulation signal, the driving signal of the last switch is determined; according to the logical relationship between the modulation signals corresponding to the front-stage switch and the rear-stage switch, the driving signal of each of the intermediate switches is determined.

[0020] As an optional implementation manner, the AC / DC multiplexing interface module includes a first port, a second port and a third port;

[0021] The operating modes of the multi-port DC interconnector module include:

[0022] The first mode is used to instruct the second port or the third port to release stored energy to the common ground via the corresponding inductor and the corresponding power switching device;

[0023] The second mode is used to instruct the first port and the second port to establish a direct energy transmission link, and the third port releases stored energy to the common ground through the corresponding power switch device;

[0024] The third mode is used to indicate that a multi-port composite energy exchange network is formed among the first port, the second port and the third port.

[0025] In a second aspect, the present application provides a multi-port AC / DC multiplexing power supply control method, which is applied to the device as described in the first aspect, and the method includes:

[0026] Detect the power distribution type of each AC / DC multiplexing interface module. When it is identified as AC input, it activates the AC rectifier / inverter circuit. When it is identified as DC input, it activates the DC buck-boost circuit.

[0027] A multi-port DC interconnection path constructed in the multi-port DC interconnector module generates a driving signal according to a preset switch modulation signal to control each power switch device in the multi-port DC interconnector module to execute a corresponding working mode.

[0028] As an optional implementation, the driving signal is generated by hierarchical logic combination, specifically including:

[0029] Determining a first switch, a middle switch, and a last switch according to the topological positions of the power switching devices;

[0030] Determining a plurality of different duty cycles according to the number of the power switching devices, and generating a first modulation signal corresponding to the first switch, a second modulation signal corresponding to the last switch, and intermediate modulation signals corresponding to each of the intermediate switches according to the corresponding duty cycles;

[0031] According to the first modulation signal, the driving signal of the first switch is determined; according to the inverted signal of the second modulation signal, the driving signal of the last switch is determined; according to the logical relationship between the modulation signals corresponding to the front-stage switch and the rear-stage switch, the driving signal of each of the intermediate switches is determined.

[0032] As an optional implementation manner, the AC / DC multiplexing interface module includes a first port, a second port and a third port;

[0033] The operating modes of the multi-port DC interconnector module include:

[0034] The first mode is used to instruct the second port or the third port to release stored energy to the common ground via the corresponding inductor and the corresponding power switching device;

[0035] The second mode is used to instruct the first port and the second port to establish a direct energy transmission link, and the third port releases stored energy to the common ground through the corresponding power switch device;

[0036] The third mode is used to indicate that a multi-port composite energy exchange network is formed among the first port, the second port and the third port.

[0037] In a third aspect, the present application provides a computer device comprising one or more processors and a memory, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the one or more processors, the steps of the method described in the second aspect are performed.

[0038] In a fourth aspect, the present application provides a storage medium storing computer-readable instructions. When the computer-readable instructions are executed by one or more processors, the one or more processors execute the steps of the method described in the second aspect.

[0039] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0040] The multi-port AC / DC multiplexing power supply device and control method provided in this application systematically address the issues of limited voltage gain, power coupling, and poor compatibility inherent in traditional power electronic transformers through innovative topology and optimized operating modes. The AC / DC multiplexing interface module utilizes dynamic hardware circuit multiplexing technology, enabling a single device to simultaneously support AC rectification / inversion and DC buck-boost functions, significantly reducing the number of power components compared to traditional dual-topology parallel solutions. The multi-port DC interconnector module establishes a reconfigurable energy path using hierarchical logic drive signals, expanding the voltage conversion range while maintaining low-loss transmission. The tri-modal or multi-modal operating mechanism designed in this application achieves power decoupling and dynamic allocation through progressive control of ground discharge, single-link transmission, and composite switching. It optimizes the energy transmission path by leveraging the inductive energy storage characteristics, ensuring reliable power supply to high-priority ports while reducing transmission losses. The exclusive-OR logic of the drive signal simplifies control complexity, avoids circulating currents, and enhances system response efficiency. Through specific drive rules and mode combinations, it improves the universality of application scenarios and provides highly compatible and reliable technical support for the construction of new power systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0042] Figure 1 A schematic diagram of a flow chart of a multi-port AC / DC multiplexing power supply method provided in one embodiment of the present application;

[0043] Figure 2 A schematic diagram of the structure of a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application;

[0044] Figure 3 A schematic diagram of the structure of a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application;

[0045] Figure 4 A schematic diagram of the structure of a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application;

[0046] Figure 5 A schematic diagram of modulation signals corresponding to a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application;

[0047] Figure 6 A schematic diagram of modulation signals corresponding to a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application;

[0048] Figure 7 A schematic diagram of the operating modes corresponding to a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application;

[0049] Figure 8 This is a diagram of the internal structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0051] New power systems, with a growing proportion of renewable energy, exhibit "double high" characteristics: a high proportion of renewable energy integration and a high proportion of power electronics equipment. They also exhibit "double randomness," characterized by both the randomness of the supply side due to weather fluctuations and the inherent randomness of the demand side's loads. The grid structure will be based on a large AC / DC grid as the backbone, with active AC / DC distribution networks and microgrids rapidly developing, enabling localized grids with local or partial local balancing of power, network, load, and storage. On the distribution side, hybrid AC / DC power distribution and AC / DC interconnection will inevitably increase. On the user side, DC loads are rapidly expanding, such as charging stations, LED lighting, and motor-driven loads with input AC / DC rectifiers, such as air conditioners and washing machines.

[0052] To meet the diverse power demands of renewable energy sources and loads, power electronics-based interconnected devices have become a hot topic of research. These devices, namely power electronic transformers, typically utilize a common DC or AC bus to interconnect multiple ports, meeting energy supply requirements at multiple voltage levels. However, power electronic transformers based on a common DC bus suffer from insufficient voltage gain and a narrow voltage conversion range for single-stage converters. In particular, there is a conflict between voltage gain and transmission power. Power electronic transformers based on a common high-frequency AC bus are more suitable for DC ports, DC power sources, and loads. However, targeting AC ports requires at least two converter stages, which increases costs and reduces efficiency. Furthermore, high-frequency AC transformers with large transformation ratios have significant parasitic capacitance, which seriously affects the stable operation of the power electronic transformer. Furthermore, power electronic transformers based on a common DC bus, with ports connected to a single DC or AC bus, can only serve a single type of device and cannot be used for AC / DC multiplexing, significantly reducing device flexibility. Therefore, in view of the development of diversified new energy and new business formats, it is urgent to study multi-port AC / DC multiplexing power supply devices to meet the flexible and diverse AC / DC multiplexing ports, achieve a wide input range and high efficiency and high voltage transformation ratio, as well as a lightweight and simplified topology structure.

[0053] In summary, the voltage gain of a single-stage port converter is low, and there is a contradiction between voltage gain and transmission power. The topology of a multi-stage port converter is complex, the cost is high, and the efficiency is low. Each port is only for a single type of power supply and load, and cannot be used for AC / DC multiplexing. The power electronic transformer based on a common high-frequency AC bus is more suitable for DC ports and DC power supplies and loads. If it is used for AC ports, at least two stages of converters are required, which will increase costs and reduce efficiency. In addition, in the power electronic transformer based on a common high-frequency AC bus, the high-frequency AC transformer with a large transformation ratio has a large parasitic capacitance, which seriously affects the stable operation of the power electronic transformer. Therefore, this application designs a multi-port AC / DC multiplexing power supply device with a common DC bus, which is aimed at the diverse needs of new energy and new business formats, meets flexible and diverse AC / DC multiplexing ports, achieves a wide input range and high-efficiency high voltage transformation ratio, and provides a lightweight and simplified topology.

[0054] Based on the specific implementation method, the technical concept of the present application is that the multi-port AC / DC multiplexing power supply device and control method provided by the present application systematically solve the problems of limited voltage gain, power coupling and poor compatibility existing in traditional power electronic transformers through topological structure innovation and operation mode optimization. The AC / DC multiplexing interface module adopts hardware circuit dynamic multiplexing technology, so that a single set of equipment can simultaneously support AC rectification / inversion and DC buck-boost functions, which significantly reduces the number of power devices compared with the traditional dual-topology parallel solution. The multi-port DC interconnector module establishes a reconfigurable energy path through hierarchical logic drive signals, expanding the voltage conversion range while maintaining low-loss transmission. The tri-modal or multi-modal operation mechanism designed in the present application realizes power decoupling and dynamic distribution through progressive control of ground discharge, single-link transmission and composite exchange, optimizes the energy transmission path in combination with the inductive energy storage characteristics, and reduces transmission losses while ensuring the power supply reliability of high-priority ports. The XOR operation logic of the drive signal simplifies the control complexity, avoids circulating current problems, and enhances the system response efficiency. Through specific drive rules and modal combinations, it improves the universality of application scenarios and provides highly compatible and reliable technical support for the construction of new power systems.

[0055] The method provided in this application is described in detail below based on corresponding implementation methods in some actual application scenarios.

[0056] See also Figure 1 , Figure 1 A flow chart of a multi-port AC / DC multiplexing power supply method provided in one embodiment of the present application is shown as follows: Figure 1 As shown, the method includes:

[0057] S101, detecting the power distribution type of each AC / DC multiplexing interface module, activating the AC rectifier / inverter circuit when AC input is identified, and activating the DC buck-boost circuit when DC input is identified;

[0058] S102 : Generate a drive signal according to a preset switch modulation signal through a multi-port DC interconnection path constructed in the multi-port DC interconnection module to control each power switch device in the multi-port DC interconnection module to execute a corresponding operating mode.

[0059] This embodiment provides a control method for a multi-port AC / DC multiplexing power supply device, which ensures seamless switching of AC / DC hybrid scenarios by real-time detection of the power distribution type and activation of the corresponding circuit mode. The drive signal of the multi-port interconnection path is generated based on hierarchical logic. In actual application scenarios, it can be combined with a duty cycle dynamic allocation strategy to achieve intelligent regulation of the energy transmission path. The hardware topology advantage is manifested as the response efficiency of the control algorithm. In the scenario of new energy grid connection, it can quickly adapt to voltage fluctuations. At the same time, it optimizes power distribution through multi-modal division, significantly improving the dynamic response capability and reliability of the power supply system.

[0060] As an optional implementation, the driving signal is generated by hierarchical logic combination, specifically including:

[0061] Determining a first switch, a middle switch, and a last switch according to the topological positions of the power switching devices;

[0062] Determining a plurality of different duty cycles according to the number of the power switching devices, and generating a first modulation signal corresponding to the first switch, a second modulation signal corresponding to the last switch, and intermediate modulation signals corresponding to each of the intermediate switches according to the corresponding duty cycles;

[0063] According to the first modulation signal, the driving signal of the first switch is determined; according to the inverted signal of the second modulation signal, the driving signal of the last switch is determined; according to the logical relationship between the modulation signals corresponding to the front-stage switch and the rear-stage switch, the driving signal of each of the intermediate switches is determined.

[0064] In this implementation, the drive signal generation logic is further refined. By negating the modulation signals corresponding to the current and lower-level switches and performing an exclusive-OR operation, the mutual exclusivity of the switch states of adjacent ports is ensured. The duty cycle signals at the first and last ports directly drive the corresponding switches, while the logical combination signals at the intermediate ports avoid energy conflicts caused by simultaneous conduction of multiple paths. This design simplifies the computational complexity of control instructions while optimizing switching losses through timing allocation. In scenarios such as dynamic load distribution, energy path switching can be completed within milliseconds, ensuring continuous power supply to critical equipment.

[0065] As an optional implementation manner, the AC / DC multiplexing interface module includes a first port, a second port and a third port;

[0066] The operating modes of the multi-port DC interconnector module include:

[0067] The first mode is used to instruct the second port or the third port to release stored energy to the common ground via the corresponding inductor and the corresponding power switching device;

[0068] The second mode is used to instruct the first port and the second port to establish a direct energy transmission link, and the third port releases stored energy to the common ground through the corresponding power switch device;

[0069] The third mode is used to indicate that a multi-port composite energy exchange network is formed among the first port, the second port and the third port.

[0070] This application provides a three-mode operation mechanism in actual application scenarios, which realizes the progressive optimization of energy transmission through timing control. The first mode eliminates the parasitic capacitance effect by discharging the port to the ground, establishing a safe initial condition for subsequent energy transmission; the second mode builds a point-to-point direct link, giving priority to ensuring efficient energy allocation of key ports; the third mode forms a multi-port composite switching network, which uses the inductive energy storage characteristics to realize dynamic power distribution. The coordinated operation of the three modes not only improves the transmission efficiency, but also solves the defect of the voltage gain in the traditional solution being limited by the single-mode operation, and enhances the system's adaptability to complex load scenarios.

[0071] The present application provides a multi-port AC / DC multiplexing power supply device, including multiple ports and a DC interconnector, each port is equipped with an AC / DC multiplexing interface, which can be used to access AC and DC busbars of different voltage levels. The internal DC interconnector provides an energy path for each external port while reducing transmission losses and improving compatibility with new energy sources. At the current stage, AC power is still the main energy source, but the proportion of new energy sources is gradually increasing. A grid-friendly AC / DC power supply system with low-voltage electricity consumption is more reasonable and meets actual needs. For details, please refer to the following implementation methods.

[0072] like Figure 2 As shown, Figure 2 This is a structural diagram of a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application. The method provided in the present application is actually implemented based on the corresponding device. Therefore, the present application provides a multi-port AC / DC multiplexing power supply device, which includes:

[0073] Multiple AC / DC multiplexing interface modules, each of which is configured to dynamically switch to an AC rectifier / inverter circuit or a DC buck-boost circuit according to the power distribution type of the access port;

[0074] A multi-port DC interconnector module comprises a plurality of power switching devices and a common DC bus, wherein each of the power switching devices is used to connect an AC / DC multiplexing interface module to the common DC bus.

[0075] This embodiment achieves intelligent reconstruction of hardware circuits and flexible configuration of energy pathways through the dynamic switching of AC / DC multiplexing interface modules and the collaborative architecture of multi-port DC interconnector modules. The AC / DC multiplexing interface module automatically switches between AC rectification / inversion or DC buck-boost mode according to the power distribution type, solving the limitation of traditional devices that only support a single type of port; the multi-port DC interconnector module establishes a reconfigurable energy pathway through switching signals driven by hierarchical logic, reducing transmission losses while expanding the voltage conversion range. In actual application scenarios, multi-modal operating intervals are divided in real time, giving priority to ensuring the energy supply of high-priority ports, while achieving power decoupling through the inductive energy storage characteristics, overcoming the problems of voltage gain and transmission power in traditional solutions, and forming a lightweight and highly compatible power supply device.

[0076] Accordingly, Figure 3 A schematic diagram of the structure of a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application is shown in FIG. Figure 3 As shown, as an optional implementation, the AC / DC multiplexing interface module includes:

[0077] Power distribution port, used to connect to external DC bus or AC bus;

[0078] First to sixth switching tubes, each comprising a combination of a three-terminal transistor and a diode, wherein in the same switching tube, the first terminal of the three-terminal transistor is idle, the second terminal of the three-terminal transistor is connected to the cathode of the diode, forming the first terminal of the corresponding switching tube, and the third terminal of the three-terminal transistor is connected to the anode of the diode, forming the second terminal of the corresponding switching tube;

[0079] In addition, the first end of the first switching tube and the second end of the fourth switching tube are connected to form a first phase circuit, and a first inductor is connected between the connection point of the first end of the first switching tube and the second end of the fourth switching tube and the power distribution port; the first end of the second switching tube and the second end of the fifth switching tube are connected to form a second phase circuit, and a second inductor is connected between the connection point of the first end of the second switching tube and the second end of the fifth switching tube and the power distribution port; the first end of the third switching tube and the second end of the sixth switching tube are connected to form a third phase circuit, and a third inductor is connected between the connection point of the first end of the third switching tube and the second end of the sixth switching tube and the power distribution port; the first ends of the fourth switching tube, the fifth switching tube and the sixth switching tube are connected, and connected to the first end of the first capacitor, and the second ends of the first switching tube, the second switching tube and the third switching tube are connected, and connected to the second end of the first capacitor.

[0080] In practical applications, independent detection and control modules can also be introduced to realize the switching function of the multiplexing structure, drive the corresponding switch tube to be on or off or connect to the associated circuit to realize the multiplexing of different AC and DC functions, for example, Figure 3 The red frame part shows a method for implementing a switching switch. According to the detected external access bus situation, the switching switch can be driven to the corresponding position, so that each switch tube can form a circuit matching the external access situation through on-off combination or combination with other components. For details, please refer to the content of the next implementation method.

[0081] This embodiment realizes the physical reuse of AC and DC circuits through a specific combination of switch tubes and inductor configuration. The first to sixth switch tubes form a three-phase bridge arm structure by connecting inductors and capacitors across them, forming a full-bridge rectifier / inverter circuit in AC mode, and reconstructing it into an interleaved parallel Buck / Boost conversion circuit in DC mode. This design avoids redundant hardware configuration through dynamic multiplexing of switch tubes, significantly reduces the number of power devices, and suppresses high-frequency harmonics through the inductor filter network to ensure the power quality in AC mode. In DC mode, the three-phase interleaved parallel structure reduces the current stress of a single branch through current sharing control, improves the buck-boost efficiency, and realizes a set of hardware to support flexible switching of AC and DC mixed scenarios.

[0082] As an optional implementation manner, the device forms a corresponding AC processing unit or DC processing unit by multiplexing the first to sixth switching tubes according to the type of bus connected to the power distribution port;

[0083] The AC processing unit includes: if the power distribution port is connected to an external AC bus, configuring the first to sixth switching tubes into a three-phase full-bridge circuit as the AC rectification / inversion circuit to perform AC rectification or inversion operations;

[0084] The DC processing unit includes: if the power distribution port is connected to an external DC bus, the first to sixth switching tubes are configured as a three-phase staggered parallel Buck / Boost conversion circuit as the DC buck-boost circuit to perform DC buck-boost conversion.

[0085] This implementation achieves differentiated control in AC and DC modes through a dynamic multiplexing mechanism for switching tubes. When connected to an AC bus, all switching tubes work together to form a three-phase full-bridge circuit, performing efficient rectification or inversion. When connected to a DC bus, the switching tubes are grouped and reconfigured into a three-phase interleaved parallel conversion circuit, reducing input and output current ripple through phase difference control. This multiplexing mechanism achieves functional switching through dynamic topological reorganization, avoiding the complex structure of multi-stage converters in traditional solutions, reducing equipment size and cost, while ensuring conversion efficiency in both AC and DC modes.

[0086] thus, Figure 4This is a structural diagram of a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application. After equating each distribution port, the topology of the multi-port interconnector can be obtained, which can be used to more clearly explain the operating mechanism of the multi-port interconnector.

[0087] In the topology provided in this application, the DC busbars of each port are interconnected via a DC interconnector composed of n switches, forming an n-port interconnected system. When one or more busbars in the system require power support, the interconnector can achieve energy transmission through the interconnector using appropriate control algorithms and modulation methods. Furthermore, using DC interconnectors for power transmission can reduce power transmission losses while ensuring power quality.

[0088] An n-port interconnector has n switches connecting n ports, which essentially establishes Figure 4 The interconnection relationship between port 1 on the left side and other ports can realize the energy interconnection function between all ports by controlling the power transmission on each interconnection path through the controller and appropriate modulation method.

[0089] As described in the corresponding method, as an optional implementation manner, the driving logic of each power switch device in the multi-port DC interconnect module includes:

[0090] Determining a first switch, a middle switch, and a last switch according to the topological positions of the power switching devices;

[0091] Determining a plurality of different duty cycles according to the number of the power switching devices, and generating a first modulation signal corresponding to the first switch, a second modulation signal corresponding to the last switch, and intermediate modulation signals corresponding to each of the intermediate switches according to the corresponding duty cycles;

[0092] According to the first modulation signal, the driving signal of the first switch is determined; according to the inverted signal of the second modulation signal, the driving signal of the last switch is determined; according to the logical relationship between the modulation signals corresponding to the front-stage switch and the rear-stage switch, the driving signal of each of the intermediate switches is determined.

[0093] Figure 5 A schematic diagram of a modulation signal corresponding to a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application, Figure 4 On the basis of the above-described implementation manner, the driving signal may be implemented based on a modulation signal corresponding to a preset duty cycle.

[0094] To ensure that each switch tube has a non-redundant switching range, it is necessary to Figure 4 In the equivalent topology, each switch tube is designed with a unique duty cycle, so that differentiated responses can be achieved. A feasible implementation method is as follows Figure 5As shown, within a cycle, the on-off duration of each switch can be determined based on the load conditions to match the load of each port. For example, the duty cycle of each switch can be dynamically allocated based on real-time load demand to achieve time allocation for each operating mode and prioritize energy supply to high-priority ports. For a description of the operating modes, please refer to the relevant embodiments. Duty cycle optimization can also be achieved based on data such as environmental parameters. For example, the device operating temperature and ambient humidity can be monitored in real time, and multiple preset duty cycle optimization algorithms or allocation strategies can be used to achieve efficient energy distribution under different operating conditions. The drive logic provided in this embodiment generates intermediate switch signals through hierarchical combination, ensuring the independence of energy paths between ports. The switch signals of the head and tail ports are directly generated by the preset duty cycle. The intermediate ports achieve logical mutual exclusion through the exclusive OR operation of the previous and subsequent signals, effectively avoiding the circulation problem caused by the simultaneous conduction of multiple ports. This drive method simplifies the complexity of the control algorithm. At the same time, by dynamically adjusting the duty cycle to adapt to different load demands, it improves the stability of the system in the case of new energy fluctuations and provides underlying control guarantees for multi-modal energy transmission.

[0095] The method of determining the driving signal based on the modulation signal corresponding to the preset duty cycle can be specifically implemented by the following formula.

[0096]

[0097] in, and is the duty cycle corresponding to the kth switch tube The intermediate modulation signal obtained under normal modulation mode and meets , The switching signal of the n-switch n-port interconnector is obtained by XORing the modulation signal of the current stage and the modulation signal of the next stage. The modulation method of the n-port n-switch can further obtain different switching combinations of the system within a switching cycle.

[0098] As described in the corresponding method, as an optional implementation, the AC / DC multiplexing interface module includes a first port, a second port, and a third port;

[0099] The operating modes of the multi-port DC interconnector module include:

[0100] The first mode is used to instruct the second port or the third port to release stored energy to the common ground via the corresponding inductor and the corresponding power switching device;

[0101] The second mode is used to instruct the first port and the second port to establish a direct energy transmission link, and the third port releases stored energy to the common ground through the corresponding power switch device;

[0102] The third mode is used to indicate that a multi-port composite energy exchange network is formed among the first port, the second port and the third port.

[0103] Figure 6 A schematic diagram of a modulation signal corresponding to a multi-port AC / DC multiplexing power supply device provided in one embodiment of the present application is provided. Figure 5 In the case shown, the device is simplified into a three-port device, which can further illustrate the distribution of the working modes. It should be noted that the three-port device is only a simple example, and the true value distribution and modal distribution of the multi-port switch tube can be deduced based on this.

[0104] Figure 7 The operating mode diagram corresponding to the multi-port AC / DC multiplexing power supply device provided for one embodiment of the present application is as follows: Within one switching cycle, the device has three modes. When the device is operating normally, the current flowing through it will be different depending on the power required to be transmitted. Therefore, the current direction in the figure can be defined as the positive direction. When the current flows in the opposite direction, if the current calculation is involved, a negative number needs to be taken. In addition, according to the load conditions actually connected to each port, a corresponding switching algorithm can also be designed to adapt to the actual application scenario. For example, port 2 or any port can be converted to the main port, not necessarily port 1 used in the example description of this application.

[0105] Among them, in the schematic diagram of each mode, Figure 7 The vertical direction with mode numbers I, II, and III located below the image is the standard direction for reading images. Figure 7 The schematic structure of the three-port simplified device is shown. The upper left part is the switch tube S1 corresponding to port 1 and the equivalent voltage source U S1 , equivalent capacitance C1 (the voltage on the equivalent resistor is U1) and equivalent resistance R S1 The upper right part is the components corresponding to port 2, and the lower right part is the components corresponding to port 3. It should be understood that the device symbols corresponding to other ports can be modified according to the corresponding ones of port 1. They will not be repeated here. Inductors L1 and L2 are the interconnection inductors between ports.

[0106] Specifically, in mode I, i.e. the first mode, S1 is off, S2 and S3 are on, and port 2 and port 3 are connected via the interconnected inductor. 、 And discharge to the ground through the switch. Since points a and b are directly connected to the ground through the switch tube, there will be no mutual discharge between ports two and three.

[0107] Mode II, i.e. the second mode, at this time S1 and S3 are turned on, S2 is turned off, port 1 and port 2 are interconnected through the interconnector, and port 3 is discharged to the ground through the switch.

[0108] Mode III, the third mode, at this time S1 and S2 are turned on, S3 is turned off, and an interconnection path is generated between port 1 and port 2 and port 3 through the interconnector. Since the potential of points a and b is higher than the positive potential of the busbar capacitor of ports 2 and 3.

[0109] like Figure 6 As shown, mode I corresponds to the switching state S1 is 0, S2 and S3 are 1, and the time it occupies in the switching cycle Ts is ; Mode II corresponds to switch state S2 is 0, S1 and S3 are 1, and the corresponding time is ; Mode III corresponds to switch state S3 is 0, S1 and S2 are 1, and the corresponding time is .

[0110] For port 2 and port 3, their port voltage and corresponding interconnection current are only related to the duty cycle of the interconnection path, and are not coupled with other ports. Therefore, it can be inferred that for the kth port, when the switch tube S k When the switch is turned off, the port is connected to port 1 through the interconnector; when the switch tube S k When enabled, the ports are discharged to ground through the interconnector, and no coupling occurs between the ports.

[0111] This application provides a three-mode operation mechanism in actual application scenarios, which realizes the progressive optimization of energy transmission through timing control. The first mode eliminates the parasitic capacitance effect by discharging the port to the ground, establishing a safe initial condition for subsequent energy transmission; the second mode builds a point-to-point direct link, giving priority to ensuring efficient energy allocation of key ports; the third mode forms a multi-port composite switching network, which uses the inductive energy storage characteristics to realize dynamic power distribution. The coordinated operation of the three modes not only improves the transmission efficiency, but also solves the defect of the voltage gain in the traditional solution being limited by the single-mode operation, and enhances the system's adaptability to complex load scenarios.

[0112] Schematically, as Figure 8 As shown, Figure 8 This is a schematic diagram of the internal structure of a computer device provided in an embodiment of the present application. The computer device 300 can be provided as a server. Figure 8 Computer device 300 includes a processing component 302, which further includes one or more processors, and a memory resource represented by memory 301 for storing instructions executable by processing component 302, such as an application. The application stored in memory 301 may include one or more modules, each corresponding to a set of instructions. In addition, processing component 302 is configured to execute the instructions to perform the method of any of the above embodiments.

[0113] The computer device 300 may further include a power supply component 303 configured to perform power management of the computer device 300, a wired or wireless network interface 304 configured to connect the computer device 300 to a network, and an input / output (I / O) interface 305. The computer device 300 may operate based on an operating system stored in the memory 301, such as Windows Server™, Mac OS X™, Unix™, Linux™, Free BSD™, or the like.

[0114] Those skilled in the art will understand that Figure 8 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0115] An embodiment of the present application provides a storage medium storing computer-readable instructions. When the computer-readable instructions are executed by one or more processors, the one or more processors execute a method as provided in any embodiment.

[0116] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0117] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referenced to each other.

[0118] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-port AC / DC multiplexing power supply device, characterized in that: The device comprises: Multiple AC / DC multiplexing interface modules, each of which is configured to dynamically switch to an AC rectifier / inverter circuit or a DC buck-boost circuit according to the power distribution type of the access port; A multi-port DC interconnector module comprises a plurality of power switching devices and a common DC bus, wherein each of the power switching devices is used to connect an AC / DC multiplexing interface module to the common DC bus.

2. The device according to claim 1, characterized in that The AC / DC multiplexing interface module includes: Power distribution port, used to connect to external DC bus or AC bus; First to sixth switching tubes, each comprising a combination of a three-terminal transistor and a diode, wherein in the same switching tube, the first terminal of the three-terminal transistor is idle, the second terminal of the three-terminal transistor is connected to the cathode of the diode, forming the first terminal of the corresponding switching tube, and the third terminal of the three-terminal transistor is connected to the anode of the diode, forming the second terminal of the corresponding switching tube; In addition, the first end of the first switching tube and the second end of the fourth switching tube are connected to form a first phase circuit, and a first inductor is connected between the connection point of the first end of the first switching tube and the second end of the fourth switching tube and the power distribution port; the first end of the second switching tube and the second end of the fifth switching tube are connected to form a second phase circuit, and a second inductor is connected between the connection point of the first end of the second switching tube and the second end of the fifth switching tube and the power distribution port; the first end of the third switching tube and the second end of the sixth switching tube are connected to form a third phase circuit, and a third inductor is connected between the connection point of the first end of the third switching tube and the second end of the sixth switching tube and the power distribution port; the first ends of the fourth switching tube, the fifth switching tube and the sixth switching tube are connected, and connected to the first end of the first capacitor, and the second ends of the first switching tube, the second switching tube and the third switching tube are connected, and connected to the second end of the first capacitor.

3. The device according to claim 2, characterized in that The device forms a corresponding AC processing unit or DC processing unit by multiplexing the first to sixth switching tubes according to the type of bus connected to the power distribution port; The AC processing unit includes: if the power distribution port is connected to an external AC bus, configuring the first to sixth switching tubes into a three-phase full-bridge circuit as the AC rectification / inversion circuit to perform AC rectification or inversion operations; The DC processing unit includes: if the power distribution port is connected to an external DC bus, the first to sixth switching tubes are configured as a three-phase staggered parallel Buck / Boost conversion circuit as the DC buck-boost circuit to perform DC buck-boost conversion.

4. The device according to claim 1, characterized in that The driving logic of each power switch device in the multi-port DC interconnector module includes: Determining a first switch, a middle switch, and a last switch according to the topological positions of the power switching devices; Determining a plurality of different duty cycles according to the number of the power switching devices, and generating a first modulation signal corresponding to the first switch, a second modulation signal corresponding to the last switch, and intermediate modulation signals corresponding to each of the intermediate switches according to the corresponding duty cycles; According to the first modulation signal, the driving signal of the first switch is determined; according to the inverted signal of the second modulation signal, the driving signal of the last switch is determined; according to the logical relationship between the modulation signals corresponding to the front-stage switch and the rear-stage switch, the driving signal of each of the intermediate switches is determined.

5. The device according to claim 4, characterized in that The AC / DC multiplexing interface module includes a first port, a second port and a third port; The operating modes of the multi-port DC interconnector module include: The first mode is used to instruct the second port or the third port to release stored energy to the common ground via the corresponding inductor and the corresponding power switching device; The second mode is used to instruct the first port and the second port to establish a direct energy transmission link, and the third port releases stored energy to the common ground through the corresponding power switch device; The third mode is used to indicate that a multi-port composite energy exchange network is formed among the first port, the second port and the third port.

6. A multi-port AC / DC multiplexing power supply control method, characterized in that: The method is applied to the device according to any one of claims 1 to 5, and the method includes: Detect the power distribution type of each AC / DC multiplexing interface module. When it is identified as AC input, it activates the AC rectifier / inverter circuit. When it is identified as DC input, it activates the DC buck-boost circuit. A multi-port DC interconnection path constructed in the multi-port DC interconnector module generates a driving signal according to a preset switch modulation signal to control each power switch device in the multi-port DC interconnector module to execute a corresponding working mode.

7. The method according to claim 6, characterized in that The driving signal is generated by hierarchical logic combination, specifically including: Determining a first switch, a middle switch, and a last switch according to the topological positions of the power switching devices; Determining a plurality of different duty cycles according to the number of the power switching devices, and generating a first modulation signal corresponding to the first switch, a second modulation signal corresponding to the last switch, and intermediate modulation signals corresponding to each of the intermediate switches according to the corresponding duty cycles; According to the first modulation signal, the driving signal of the first switch is determined; according to the inverted signal of the second modulation signal, the driving signal of the last switch is determined; according to the logical relationship between the modulation signals corresponding to the front-stage switch and the rear-stage switch, the driving signal of each of the intermediate switches is determined.

8. The method according to claim 7, characterized in that The AC / DC multiplexing interface module includes a first port, a second port and a third port; The operating modes of the multi-port DC interconnector module include: The first mode is used to instruct the second port or the third port to release stored energy to the common ground via the corresponding inductor and the corresponding power switching device; The second mode is used to instruct the first port and the second port to establish a direct energy transmission link, and the third port releases stored energy to the common ground through the corresponding power switch device; The third mode is used to indicate that a multi-port composite energy exchange network is formed among the first port, the second port and the third port.

9. A computer device, characterized in that: The method comprises one or more processors and a memory, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the one or more processors, the steps of the method according to any one of claims 6 to 8 are performed.

10. A storage medium, characterized in that: The storage medium stores computer-readable instructions, which, when executed by one or more processors, enable the one or more processors to perform the steps of the method according to any one of claims 6 to 8.

Images