Dual supply mode three-phase sine wave filter and supply module

Abstract

The application discloses a dual power supply mode three-phase sine wave filter and a power supply module, which are used for realizing high-quality power supply in a dual power supply mode. The scheme comprises the following steps: a first inductance adaptation module is connected between a first phase input end and a first phase output end; a second inductance adaptation module is connected between a second phase input end and a second phase output end; a third inductance adaptation module is connected between a third phase input end and a third phase output end; a first capacitance adaptation module is connected between the first phase output end and the second phase output end; a second capacitance adaptation module is connected between the second phase output end and the third phase output end; a third capacitance adaptation module is connected between the third phase output end and the first phase output end; the inductance adaptation module is connected with a first adaptation inductance in a first power supply mode and is connected with a second adaptation inductance in a second power supply mode; and the capacitance adaptation module is connected with a first adaptation capacitance in the first power supply mode and is connected with a second adaptation capacitance in the second power supply mode.

Description

Technical Field

[0001] This application relates to the field of power supply equipment, and in particular to a three-phase sinusoidal filter and power supply module with dual power supply system. Background Technology

[0002] In the field of power supply equipment, locomotive auxiliary power supply systems have high requirements for power quality. High-quality power supply is beneficial to improving the operating efficiency of locomotive electrical loads and extending their service life, as well as enhancing the electromagnetic compatibility of locomotive electrical systems.

[0003] In some scenarios, the power supply requirements of the locomotive auxiliary power supply load are different, and a single power supply system cannot meet the power demand of the load, and the power supply quality is poor.

[0004] How to achieve high-quality power supply in a dual power supply system is the technical problem that this application aims to solve. Utility Model Content

[0005] The purpose of this application is to provide a three-phase sine wave filter and power supply module with dual power supply system to achieve high-quality power supply with dual power supply system.

[0006] In a first aspect, embodiments of this application provide a three-phase sinusoidal filter with a dual-power supply system, comprising: A first inductor adapter module connected between the first phase input terminal and the first phase output terminal; A second inductor adapter module connected between the second phase input terminal and the second phase output terminal; A third inductor adapter module connected between the third phase input terminal and the third phase output terminal; A first capacitor adapter module connected between the first phase output terminal and the second phase output terminal; A second capacitor adapter module connected between the second phase output terminal and the third phase output terminal; A third capacitor adapter module connected between the third phase output terminal and the first phase output terminal; Among them, any one of the inductor adapter modules is connected to the first adapter inductor under the first power supply system, and is connected to the second adapter inductor under the second power supply system; In this configuration, any one of the capacitor adapter modules is connected to a first adapter capacitor under the first power supply mode, and to a second adapter capacitor under the second power supply mode.

[0007] Secondly, embodiments of this application provide a power supply module, including: Power supply; A three-phase inverter, wherein the input terminal of the three-phase inverter is electrically connected to the power supply terminal of the power supply. As described in the first aspect, the three-phase sinusoidal filter with dual power supply system has its input terminal electrically connected to the output terminal of the three-phase inverter.

[0008] This application provides a three-phase sinusoidal filter with dual power supply. An inductor-capacitor sinusoidal filter is constructed in the three-phase circuit using an inductor adapter module and a capacitor adapter module to filter out high-order harmonics. The inductor adapter module and capacitor adapter module are respectively connected to the appropriate inductor and capacitor according to the actual power supply system. By adapting the inductor and capacitor values, the filtering function is ensured to meet the power supply system requirements, thereby achieving high-quality power supply in a dual power supply system. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is one of the structural schematic diagrams of a three-phase sinusoidal filter with dual power supply provided in an embodiment of this application; Figure 2 This is a second schematic diagram of the structure of a three-phase sinusoidal filter with dual power supply provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a power supply module provided in one embodiment of this application; Figure 4 This is a schematic diagram of the circuit structure of a three-phase inverter for a power supply module provided in one embodiment of this application. Detailed Implementation

[0010] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The drawing numbers in this application are only used to distinguish the various steps in the solution and are not used to limit the execution order of the various steps. The specific execution order is subject to the description in the specification.

[0011] In the field of power supply equipment, the auxiliary power supply system of DC drive electric locomotives can provide power to the auxiliary motors and various equipment in the driver's cab. This auxiliary power supply system can also be called the locomotive emergency auxiliary power supply system. It uses lithium-ion power batteries as energy storage components, combined with power electronic power converters to achieve emergency auxiliary power supply for the locomotive.

[0012] For example, an emergency auxiliary power supply system for an electric locomotive may include four parts: a lithium iron phosphate energy storage battery pack, a battery charger, a DC / DC converter, and a three-phase inverter.

[0013] Among them, the three-phase inverter is an important component of the emergency auxiliary power supply system. The sinusoidal pulse width modulation (SPWM) output of the three-phase inverter requires a capacitor-inductor (LC) filter connected in series. It can be called a sine wave filter and can be used to filter out high-order harmonics to provide high-quality AC sinusoidal voltage to the locomotive electrical system.

[0014] The parameters of the aforementioned sinusoidal filter are closely related to the output frequency and voltage of the three-phase inverter. In order to improve the quality of the power supply voltage and the filtering effect, the configuration of the filter parameters is very important.

[0015] In one application scenario, a lithium iron phosphate battery pack, in conjunction with a supercapacitor, can be used to construct a power supply circuit to provide emergency auxiliary power to the vehicle. This emergency power supply method can meet the vehicle's emergency traction power needs, but the battery's power supply reliability is low, its service life is short, and it cannot guarantee a stable and high-quality power supply.

[0016] Specifically, locomotive emergency auxiliary power supply refers to the supply of power to locomotive electrical components such as air conditioners, electric fans, heaters, and electric heaters in the driver's control room under non-special operating conditions. Power supply quality is crucial for improving the operating efficiency of locomotive electrical loads, extending their service life, and enhancing the electromagnetic compatibility (EMC) of the locomotive's electrical system.

[0017] In some scenarios, locomotive auxiliary power supply loads may require multiple different power supply systems. For example, factors such as air conditioning temperature regulation and electric fan speed require power supply systems with multiple voltages and frequencies. In such cases, the aforementioned emergency auxiliary power supply methods cannot meet the needs of multiple power supply systems.

[0018] To address the problems existing in related technologies, embodiments of this application provide a three-phase sinusoidal filter with dual power supply, such as... Figure 1 As shown, it includes: A first inductor adapter module connected between the first phase input terminal U and the first phase output terminal U1; A second inductor adapter module connected between the second phase input terminal V and the second phase output terminal V1; A third inductor adapter module connected between the third phase input terminal W and the third phase output terminal W1; A first capacitor adapter module connected between the first phase output terminal U1 and the second phase output terminal V1; A second capacitor adapter module is connected between the second phase output terminal V1 and the third phase output terminal W1; A third capacitor adapter module connected between the third phase output terminal W1 and the first phase output terminal U1; Among them, any one of the inductor adapter modules is connected to the first adapter inductor under the first power supply system, and is connected to the second adapter inductor under the second power supply system; In this configuration, any one of the capacitor adapter modules is connected to a first adapter capacitor under the first power supply mode, and to a second adapter capacitor under the second power supply mode.

[0019] The solutions provided in this application relate to the field of auxiliary power supply equipment for electric locomotives, specifically to the control and filtering technology for high-quality sinusoidal waveform output by power electronic inverters.

[0020] In the field of power supply equipment, the voltage waveform output by a three-phase inverter composed of power electronic devices can be an SPWM wave. The three-phase sine wave filter provided in this application embodiment can be connected to the output terminal of the three-phase inverter to perform filtering on the inverter's output. The three-phase sine wave filter provided in this solution is an LC filter, which can filter out higher harmonics and retain the fundamental wave, ensuring that the output waveform after filtering is not distorted or deformed, thereby improving the quality of the output sine wave.

[0021] In the three-phase sinusoidal filter provided in this application embodiment, the adapter inductor in the inductor adapter module and the adapter capacitor in the capacitor adapter module constitute an LC filter to achieve the above-mentioned filtering function. The inductor adapter module and the capacitor adapter module are connected to compatible electronic devices based on the power supply system, ensuring that the connected inductance and capacitance values ​​meet the power supply system requirements.

[0022] In one embodiment, the power demand of the locomotive's electrical systems is variable, thus requiring a dual power supply system. For example, the power demand of the SS4B locomotive (Shaoshan 4B electric locomotive) includes two different voltage and frequency power supply systems: AC380V / 50Hz and AC190V / 25Hz, based on the voltage system required for the variable frequency air conditioner and fan.

[0023] The three-phase sine wave filter provided in this application embodiment can be effectively applied to the locomotive emergency auxiliary power supply system. It achieves high-quality filtering of the two systems (e.g., AC380V / 50Hz and AC190V / 25Hz) of three-phase AC power output from the three-phase inverter. By efficiently filtering out high-order harmonics, it outputs a high-quality sine wave, effectively improving the power supply quality to the locomotive's emergency auxiliary electrical appliances. Through high-quality power supply, it effectively reduces heat loss and extends the service life of the electrical loads in the locomotive driver's cab.

[0024] The inductor and capacitor adapter modules provided in this application embodiment can achieve electronic device adaptation through adapter switches. For example, the inductor adapter module may include a first adapter inductor and a second adapter inductor connected in parallel, and the adapter switch achieves adaptation switching between the branch containing the first adapter inductor and the branch containing the second adapter inductor. When the input sine wave matches a first power supply system, the adapter switch connects to the branch containing the first adapter inductor, thereby connecting the first adapter inductor into the circuit. When the input sine wave matches a second power supply system, the adapter switch connects to the branch containing the second adapter inductor, thereby connecting the second adapter inductor into the circuit. Similarly, the capacitor adapter module may also include a first adapter capacitor and a second adapter capacitor connected in parallel, and the above branch switching is achieved through an adapter switch. The three phases achieve synchronous switching, ensuring consistency of phase parameters and three-phase balance stability.

[0025] By using inductor and capacitor adapter modules, compatible inductors and capacitors can be connected to the circuit based on the power supply system, ensuring that the LC filter can effectively filter the input sine wave and improve the quality of the output sine wave. This solution achieves compatible connection of inductors and capacitors through inductor and capacitor adapter modules, thereby meeting the filtering requirements of dual power supply systems and enabling flexible and adaptive sine wave filtering.

[0026] This solution provides a three-phase sinusoidal filter with dual power supply. An inductor-capacitor sinusoidal filter is constructed in the three-phase circuit using inductor and capacitor adapter modules to filter out high-order harmonics. Specifically, the inductor and capacitor adapter modules are connected to the appropriate inductor and capacitor values ​​according to the actual power supply system. By adapting the inductor and capacitor values, the filtering function is ensured to meet the requirements of the power supply system, thereby achieving high-quality power supply in a dual-power supply system.

[0027] Based on the three-phase sinusoidal filter with dual power supply system described in the above embodiments, optionally, the voltage value of the first power supply system is less than the voltage value of the second power supply system, and the frequency of the first power supply system is less than the frequency of the second power supply system. The first adapter inductor is greater than the second adapter inductor; The first adapter capacitor is larger than the second adapter capacitor.

[0028] In the solution provided in this application embodiment, the power supply system involves voltage and frequency. The first power supply system has a smaller voltage and frequency compared to the second power supply system. To address this, this solution uses an inductor adapter module and a capacitor adapter module. A larger first adapter inductor and capacitor are used under the first power supply system, while a smaller second adapter inductor and capacitor are used under the second power supply system. This ensures that the inductance and capacitance values ​​of the three-phase sinusoidal filter match the actual power supply system, improving the quality of the filtered power supply.

[0029] Based on the three-phase sinusoidal filter with dual power supply system described in the above embodiments, optionally, such as Figure 2 As shown, any inductor adapter module includes a first inductor, a second inductor, and an inductor adapter switch, wherein the first inductor and the second inductor are connected in series, and the second inductor is connected in parallel with the inductor adapter switch.

[0030] Figure 2 A schematic diagram of a three-phase sinusoidal filter with dual power supply system provided in an embodiment of this application is shown. Wherein, L U and L U1 L V and L V1 L W and L W1 U, V, and W are the filter inductors for phases U, V, and W respectively; K1, K2, and K3 are inductor adapter switches (contactors). The U, V, and W terminals of the three-phase variable parameter sine wave filter are the input terminals, which can be connected to the output terminals of a three-phase inverter. U1, V1, and W1 are the output terminals of the three-phase filter, which can be connected to a load.

[0031] Specifically, the first inductor adapter module includes K1 and L. U and L U1 The second inductor adapter module includes K2 and L. V and L V1 The third inductor adapter module includes K3 and L. W and L W1 .

[0032] Each inductor adapter module includes two inductors and an inductor adapter switch. The inductor adapter switch is connected in parallel with one of the inductors, used to control the parallel inductor's connection to the circuit when the switch is open, and to short-circuit the parallel inductor when the switch is closed. Therefore, by controlling the opening and closing of the inductor adapter switch, the inductance value connected to the circuit can be controlled.

[0033] Based on the three-phase sinusoidal filter with dual power supply system described in the above embodiments, optionally, the inductor adapter switch is turned off under the first power supply system and closed under the second power supply system.

[0034] In the solution provided in this application embodiment, under the first power supply system, the inductor adapter switch is open, allowing the two inductors in the inductor adapter module to be connected in series in the circuit, thereby connecting a first adapter inductor with a larger inductance value in the circuit. Under the second power supply system, the inductor adapter switch is closed, allowing one inductor in the inductor adapter module to be connected in the circuit, while the other inductor is short-circuited, thereby connecting a second adapter inductor with a smaller inductance value in the circuit.

[0035] Based on the three-phase sinusoidal filter with dual power supply system described in the above embodiments, optionally, any capacitor adapter module includes a first capacitor, a second capacitor, and a capacitor adapter switch, wherein the first end of the first capacitor is electrically connected to the first end of the second capacitor, the second end of the second capacitor is electrically connected to the first end of the capacitor adapter switch, and the second end of the capacitor adapter switch is electrically connected to the second end of the first capacitor.

[0036] See Figure 2 The circuit diagram shown is of a three-phase sinusoidal filter with dual power supply provided in an embodiment of this application. U and C U1 C V and C V1 C W and C W1 U, V, and W are the filter capacitors for phases U, V, and W respectively; K4, K5, and K6 are capacitor adapter switches (contactors). U, V, and W are the input terminals of the three-phase variable parameter sine wave filter, which can be connected to the output terminals of a three-phase inverter. U1, V1, and W1 are the output terminals of the three-phase filter, which can be connected to a load.

[0037] Specifically, the first capacitor adapter module includes K4 and C. U and C U1 The second capacitor adapter module includes K5 and C. V and C V1 The third capacitor adapter module includes K6 and C. W and C W1 .

[0038] Each capacitor adapter module includes two capacitors and a capacitor adapter switch. The capacitor adapter switch is connected in series with one of the capacitors. When the switch is closed, it controls the series-connected capacitor to be connected in the circuit, allowing the two capacitors belonging to the same capacitor adapter module to be connected in parallel. When the switch is open, it prevents the series-connected capacitor from being connected in the circuit, retaining only the capacitor of the other branch in the circuit. Therefore, by controlling the opening and closing of the capacitor adapter switch, the capacitance value of the connected capacitor can be controlled.

[0039] Based on the three-phase sinusoidal filter with dual power supply system described in the above embodiments, optionally, the capacitor adapter switch is turned off under the first power supply system and closed under the second power supply system.

[0040] In the solution provided in this application embodiment, under the first power supply system, the capacitor adapter switch is open, so that only one capacitor in the capacitor adapter module is connected to the circuit, thereby connecting a first adapter capacitor with a larger capacitance value in the circuit. Under the second power supply system, the capacitor adapter switch is closed, so that two capacitors in the capacitor adapter module are connected in parallel to the circuit, thereby connecting a second adapter capacitor with a smaller capacitance value in the circuit.

[0041] Based on the three-phase sinusoidal filter with dual power supply system described in the above embodiments, optionally, The voltage of the first power supply system is 190V, and the frequency of the first power supply system is 25Hz; The voltage of the second power supply system is 380V, and the frequency of the second power supply system is 50Hz.

[0042] In a practical application scenario, the output terminals U1, V1, and W1 of the three-phase sinusoidal filter provided in this application embodiment can be connected to the three-phase isolation transformer of the locomotive, thereby powering the auxiliary electrical loads in the locomotive driver's cab. Based on the two power supply systems described in this application embodiment, the parameters of the inductors and capacitors of phases U, V, and W, as well as the states of each control switch, are shown in Table 1 under two different operating modes of the three-phase inverter circuit. Table 1

[0043] When a three-phase inverter operates at two different voltage systems and frequencies, after being filtered by the three-phase sinusoidal wave filter of the dual power supply system provided in this application embodiment, a perfect three-phase sinusoidal wave voltage can be obtained, and its expression is shown in Equation (1).

[0044] (1) Among them, the above-mentioned three-phase perfect sine wave refers to a sine wave with a lower harmonic content (generally less than 3%) and a lower waveform distortion (generally less than 2%) compared to the fundamental wave (such as 50Hz).

[0045] The three-phase sinusoidal filter based on the dual-power supply system described in the above embodiments may optionally further include: A digital signal processor, wherein the digital signal processor is electrically connected to at least one of the inductor adapter modules, and / or, the digital signal processor is electrically connected to at least one of the capacitor adapter modules.

[0046] In the three-phase sinusoidal filter provided in this application embodiment, the inductor adapter switch and / or capacitor adapter switch can be a single-phase contactor with contacts. These single-phase contactors can be connected to a DSP (Digital Signal Processor) for control, so as to switch on and off under the control of the DSP.

[0047] For example, each inductor adapter module in a three-phase sine wave filter contains an inductor adapter switch, and each capacitor adapter module contains a capacitor adapter switch. Therefore, the three-phase sine wave filter contains three inductor adapter switches and three capacitor adapter switches, which are electrically connected to a DSP controller. The DSP controller switches the adapter switches on and off according to the power supply mode at the input, thereby effectively controlling and switching the inductance and capacitance values ​​in the three-phase sine wave filter based on the actual power supply mode. This ensures that the three-phase sine wave filter can effectively filter and output a high-quality sine wave.

[0048] Optionally, in this embodiment, the adapter switch for the three-phase sinusoidal filter can also be replaced by a contactless switch (such as a power electronic device), which can be controlled by a microcontroller. In practical applications, the type of switch and the controller used to control the switch can be flexibly selected according to actual needs.

[0049] In locomotive power supply applications, the locomotive emergency power supply, after employing a three-phase sine wave filter with a dual power supply system as described in any of the above embodiments of this application, can output a perfect sine wave with low harmonic content and low distortion, regardless of the power supply system in operation. Compared with filter circuits without filters or using filter circuits with fixed or uncontrollable parameters, the solution provided by the embodiments of this application can improve the quality of locomotive emergency auxiliary power supply; reduce harmonic losses of locomotive auxiliary electrical appliances, reduce heat generation, and improve the operating efficiency of locomotive electrical appliances; extend the service life of locomotive electrical appliances and reduce their maintenance workload; and improve the electromagnetic compatibility performance of locomotive electrical appliances.

[0050] The three-phase sine wave filter with dual power supply provided in this application embodiment can switch the inductor and capacitor of the circuit according to the actual input power supply system, thereby flexibly realizing adaptive filtering, ensuring that the circuit uses the best filtering parameters, so that the filter operates at the optimal operating point and achieves a perfect sine wave output with low harmonics and low distortion.

[0051] To address the problems existing in related technologies, embodiments of this application provide a power supply module, such as... Figure 3 As shown, it includes: Power supply; A three-phase inverter, wherein the input terminal of the three-phase inverter is electrically connected to the power supply terminal of the power supply. As described in any of the above embodiments, the input terminal of the three-phase sinusoidal filter is electrically connected to the output terminal of the three-phase inverter.

[0052] This application provides a power supply module, which includes a power supply, a three-phase inverter, and a three-phase sinusoidal wave filter. The three-phase inverter, composed of power electronic devices, outputs a voltage waveform of SPWM (Signal-Pulse Width Modulation), which needs to be filtered by a parameter-adapted LC filter to remove higher harmonics, retain the fundamental frequency, and ensure the waveform is undistorted and unbiased, resulting in a sinusoidal voltage output. In the power supply module provided in this application, the power supply provides electrical energy, and the three-phase sinusoidal wave output by the three-phase sinusoidal wave filter is filtered by the filter. The output terminal of the three-phase sinusoidal wave filter can be connected to a load; optionally, the load can be connected via a three-phase isolation transformer.

[0053] The following section will further explain this solution in the context of a practical application scenario where an electric locomotive is receiving current without a contact network.

[0054] When an electric locomotive is operating without overhead contact line current collection, if a sinusoidal filter with fixed capacitor and inductor is used, the locomotive's auxiliary power supply system often cannot provide the required dual-power supply AC voltage to loads such as auxiliary electrical equipment in the driver's cab. These auxiliary electrical devices in the driver's cab include, for example, instrument displays, air conditioners, heaters, electric fans, water heaters, and mobile phone charging sockets.

[0055] The power supply module provided in this application embodiment can achieve three-phase output of dual power supply system through three-phase inverter and achieve effective filtering through three-phase sine wave filter, so as to continuously provide high-quality emergency auxiliary power supply to the locomotive driver's cab and meet the normal AC voltage power supply of all auxiliary loads in the driver's cab under special operating conditions.

[0056] Optionally, the power supply in this solution can be a lithium iron phosphate battery pack, which provides DC power. This DC 550V voltage is then converted into AC voltages of two different voltage and frequency standards by a three-phase DC / AC inverter: AC 380V / 50Hz and AC 190V / 25Hz. Subsequently, the three-phase AC power output from the inverter passes through a dual-power supply three-phase sine wave filter. This filter uses inductors and capacitors matched to the actual power supply system to perform filtering, eliminating high-order harmonics to output a perfect sine wave for supplying various auxiliary electrical appliances in the driver's cab, thus achieving emergency auxiliary power supply for the locomotive.

[0057] Figure 4 A schematic diagram of the circuit structure of a three-phase inverter for a power supply module provided in an embodiment of this application is shown. It should be understood that in practical applications, other three-phase inverters with different circuit structures can also be selected according to actual needs.

[0058] In the application scenario of emergency auxiliary power supply for locomotives, the power supply module provided in this application embodiment uses a three-phase inverter to convert the DC voltage of the on-board lithium iron phosphate battery into two AC voltage standards (e.g., AC380V / 50Hz and AC190V / 25Hz). Subsequently, a three-phase sine wave filter with dual power supply standards can filter out the high-order harmonics of the SPWM waves of both standards, outputting a high-quality sine wave. The LC parameters of the three-phase sine wave filter can be adapted and switched according to the actual power supply standard to improve the quality of the output sine wave, thereby improving the power supply quality of the locomotive's auxiliary electrical appliances, reducing harmonic heat loss of the locomotive's electrical appliances, improving auxiliary power supply efficiency, and enhancing the EMC performance of the locomotive's electrical system.

[0059] Based on the power supply module described in the above embodiments, optionally, the output voltage of the three-phase inverter satisfies either the first power supply system or the second power supply system.

[0060] The three-phase inverter provided in this application embodiment can be composed of IGBT (Insulated Gate Bipolar Transistor) power electronic devices. A high-speed digital signal processor (DSP) can be used as the controller of the three-phase inverter, and the SPWM control method is used to make it output a sinusoidal pulse width modulation (SPWM) wave. The main component of the SPWM wave is a sinusoidal fundamental wave, which also contains various higher harmonics (such as 2k±1).

[0061] In the power supply module provided in this application embodiment, a three-phase sine wave filter with dual power supply system is connected to the output terminal of the three-phase inverter to filter out various high-order harmonics and output a pure sine wave fundamental frequency. Since the L and C of the three-phase sine wave filter with dual power supply system of the power supply module provided in this application embodiment can be adapted and switched according to the actual power supply system, it can realize the filtering function of automatic parameter matching.

[0062] In practical applications, regardless of which of the two voltage systems the three-phase inverter of the locomotive emergency auxiliary power supply system outputs, the sine wave filter can automatically switch and adjust the LC filter parameters to operate at the optimal operating point, efficiently filter out all high-order harmonics, output a perfect sine wave, and achieve high-quality locomotive emergency auxiliary power supply voltage.

[0063] The power supply module provided in this application embodiment can meet the dual power supply system requirements in locomotive emergency auxiliary power supply application scenarios. Under the control of the switch, it realizes capacitor and inductor switching to achieve the best filtering effect. Among them, the three phases achieve synchronous switching to ensure the consistency of parameters of each phase and the stability of three-phase balance.

[0064] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0065] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0066] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0067] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0068] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0069] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0070] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0071] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0072] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0073] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A dual power supply mode three-phase sine wave filter, characterized by, include: A first inductor adapter module connected between the first phase input terminal and the first phase output terminal; A second inductor adapter module connected between the second phase input terminal and the second phase output terminal; A third inductor adapter module connected between the third phase input terminal and the third phase output terminal; A first capacitor adapter module connected between the first phase output terminal and the second phase output terminal; A second capacitor adapter module connected between the second phase output terminal and the third phase output terminal; A third capacitor adapter module connected between the third phase output terminal and the first phase output terminal; Among them, any one of the inductor adapter modules is connected to the first adapter inductor under the first power supply system, and is connected to the second adapter inductor under the second power supply system; In this configuration, any one of the capacitor adapter modules is connected to a first adapter capacitor under the first power supply mode, and to a second adapter capacitor under the second power supply mode.

2. The dual power supply mode three-phase sine wave filter of claim 1, wherein, The voltage value of the first power supply system is lower than the voltage value of the second power supply system, and the frequency of the first power supply system is lower than the frequency of the second power supply system; The first adapter inductor is greater than the second adapter inductor; The first adapter capacitor is larger than the second adapter capacitor.

3. The three-phase sinusoidal filter with dual power supply as described in claim 2, characterized in that, Any inductor adapter module includes a first inductor, a second inductor, and an inductor adapter switch, wherein the first inductor and the second inductor are connected in series, and the second inductor is connected in parallel with the inductor adapter switch.

4. The three-phase sinusoidal filter with dual power supply as described in claim 3, characterized in that, The inductive adapter switch is turned off under the first power supply mode and closed under the second power supply mode.

5. The three-phase sinusoidal filter with dual power supply as described in claim 2, characterized in that, Each capacitor adapter module includes a first capacitor, a second capacitor, and a capacitor adapter switch, wherein a first terminal of the first capacitor is electrically connected to a first terminal of the second capacitor, a second terminal of the second capacitor is electrically connected to a first terminal of the capacitor adapter switch, and a second terminal of the capacitor adapter switch is electrically connected to a second terminal of the first capacitor.

6. The three-phase sinusoidal filter with dual power supply as described in claim 5, characterized in that, The capacitor adapter switch is turned off under the first power supply mode and closed under the second power supply mode.

7. The three-phase sinusoidal filter with dual power supply as described in any one of claims 2 to 6, characterized in that, The voltage of the first power supply system is 190V, and the frequency of the first power supply system is 25Hz; The voltage of the second power supply system is 380V, and the frequency of the second power supply system is 50Hz.

8. The dual power supply mode three-phase sine wave filter according to any one of claims 1 to 6, wherein, Also includes: A digital signal processor, wherein the digital signal processor is electrically connected to at least one of the inductor adapter modules, and / or, the digital signal processor is electrically connected to at least one of the capacitor adapter modules.

9. A power supply module, characterized by include: Power supply; A three-phase inverter, wherein the input terminal of the three-phase inverter is electrically connected to the power supply terminal of the power supply. The dual power supply mode three-phase sine wave filter according to any one of claims 1-7, wherein an input end of the three-phase sine wave filter is electrically connected to an output end of the three-phase inverter.

10. The power supply module of claim 9, wherein, The output voltage of the three-phase inverter satisfies the first power supply mode or the second power supply mode.

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