Flywheel power supply system, method, equipment and medium

Abstract

The invention provides a flywheel power supply system, method and device and a medium, and relates to the technical field of power equipment. The rectification module is electrically connected with the power grid and the voltage conversion module. The voltage conversion module is also electrically connected with the inverter circuit; the inverter circuit is also electrically connected with the flywheel; the rectification module obtains an initial voltage from a power grid and rectifies the initial voltage to obtain a first target voltage and sends the first target voltage to the voltage conversion module. The voltage conversion module converts the first target voltage into a second target voltage and sends the second target voltage to the inverter circuit, and the voltage value of the second target voltage is greater than that of the first target voltage; the inverter circuit converts the second target voltage into a third target voltage and charges the flywheel with the third target voltage, and the voltage value of the third target voltage meets a preset voltage condition. According to the invention, the energy conversion efficiency is improved while the equipment cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, and in particular, to a flywheel power supply system, method, device and medium. Background Art

[0002] A flywheel is a mechanical energy storage device that stores kinetic energy by being driven by electric energy to rotate at a high speed. Traditional flywheel power supply systems generally consist of a step-up transformer, an energy storage converter, and a machine-side inverter. The equipment with such a multi-stage voltage conversion structure in the prior art has a high cost and low energy efficiency. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to overcome the deficiencies in the prior art and provide a flywheel power supply system, method, device and medium, aiming to reduce the equipment cost and improve the energy conversion efficiency. The present invention provides the following technical solutions:

[0004] In a first aspect, the present invention provides a flywheel power supply system, and the system includes: a rectifier boost circuit and an inverter circuit; the rectifier boost circuit includes: a rectifier module and a voltage conversion module, and the rectifier module and the voltage conversion module form a three-phase PFC topology; the rectifier module is electrically connected to the power grid and the voltage conversion module respectively; the voltage conversion module is also electrically connected to the inverter circuit; the inverter circuit is also electrically connected to the flywheel;

[0005] The rectifier module is used to obtain an initial voltage from the power grid, rectify the initial voltage to obtain a first target voltage, and send the first target voltage to the voltage conversion module; the voltage conversion module is used to convert the first target voltage into a second target voltage and send the second target voltage to the inverter circuit, and the voltage value of the second target voltage is greater than the voltage value of the first target voltage; the inverter circuit is used to convert the second target voltage into a third target voltage and charge the flywheel with the third target voltage, and the voltage value of the third target voltage meets a preset voltage condition.

[0006] In an embodiment, the rectifier module includes: a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, and a sixth switch tube;

[0007] The input ends of the first switch tube, the third switch tube, and the fifth switch tube are respectively electrically connected to the positive input end of the inverter circuit;

[0008] The output ends of the second switch tube, the fourth switch tube, and the sixth switch tube are respectively electrically connected to the negative input end of the inverter circuit;

[0009] The output terminal of the first switching tube and the input terminal of the second switching tube are respectively electrically connected to the first-phase output of the power grid;

[0010] The output terminal of the third switching tube and the input terminal of the fourth switching tube are respectively electrically connected to the second-phase output of the power grid;

[0011] The output terminal of the fifth switching tube and the input terminal of the sixth switching tube are respectively electrically connected to the third-phase output of the power grid.

[0012] In an embodiment, the rectification module further includes: a filtering unit; a first end of the filtering unit is electrically connected to the positive input terminal of the inverter circuit, and a second end of the filtering unit is electrically connected to the negative input terminal of the inverter circuit.

[0013] In an embodiment, the voltage conversion module includes: a first energy storage inductor, a second energy storage inductor, and a third energy storage inductor;

[0014] A first end of the first energy storage inductor is electrically connected to the first-phase output of the power grid, and a second end of the first energy storage inductor is respectively electrically connected to the output terminal of the first switching tube and the input terminal of the second switching tube;

[0015] A first end of the second energy storage inductor is electrically connected to the second-phase output of the power grid, and a second end of the second energy storage inductor is respectively electrically connected to the output terminal of the third switching tube and the input terminal of the fourth switching tube;

[0016] A first end of the third energy storage inductor is electrically connected to the third-phase output of the power grid, and a second end of the third energy storage inductor is respectively electrically connected to the output terminal of the fifth switching tube and the input terminal of the sixth switching tube.

[0017] In an embodiment, the voltage conversion module further includes: a seventh switching unit, an eighth switching unit, a ninth switching unit, a tenth switching unit, an eleventh switching unit, and a twelfth switching unit;

[0018] An input terminal of the seventh switching unit is electrically connected to the second end of the first energy storage inductor, and an output terminal of the seventh switching unit is electrically connected to an output terminal of the eighth switching unit; an input terminal of the eighth switching unit is connected to the neutral point;

[0019] An input terminal of the ninth switching unit is electrically connected to the second end of the second energy storage inductor, and an output terminal of the ninth switching unit is electrically connected to an output terminal of the tenth switching unit; an input terminal of the tenth switching unit is electrically connected to the neutral point;

[0020] The input terminal of the eleventh switching unit is electrically connected to the second terminal of the third energy storage inductor, and the output terminal of the eleventh switching unit is electrically connected to the output terminal of the twelfth switching unit; the input terminal of the twelfth switching unit is electrically connected to the neutral point.

[0021] In one embodiment, the filtering unit includes: a first filtering capacitor and a second filtering capacitor; a first terminal of the first filtering capacitor is electrically connected to the positive input terminal of the inverter circuit, and a second terminal of the first filtering capacitor is electrically connected to the neutral point; a first terminal of the second filtering capacitor is electrically connected to the neutral point, and a second terminal of the second filtering capacitor is electrically connected to the negative input terminal of the inverter circuit.

[0022] In one embodiment, the system further includes: a control circuit, and the control circuit includes: a monitoring unit and a control unit; the monitoring unit is electrically connected to the power grid and the control unit respectively; the control unit is further electrically connected to the control terminals of the respective switching units;

[0023] The monitoring unit is configured to monitor a plurality of preset power grid parameters and send each of the preset power grid parameters to the control unit; the control unit is configured to send corresponding control signals to the respective switching units according to each of the preset power grid parameters.

[0024] In a second aspect, the present invention provides a flywheel power supply method, which is applied to the flywheel power supply system described in the first aspect. The method includes:

[0025] The rectification module obtains an initial voltage from the power grid, rectifies the initial voltage to obtain a first target voltage, and sends the first target voltage to the voltage conversion module;

[0026] The voltage conversion module converts the first target voltage into the second target voltage, and sends the second target voltage to the inverter circuit. The voltage value of the second target voltage is greater than the voltage value of the first target voltage;

[0027] The inverter circuit converts the second target voltage into a third target voltage, and charges the flywheel with the third target voltage. The voltage value of the third target voltage meets a preset voltage condition.

[0028] In a third aspect, the present invention provides an electronic device, including a memory and a processor. The memory stores a computer program, and when the computer program runs on the processor, it executes the flywheel power supply method described in the second aspect.

[0029] In a fourth aspect, the present invention provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the flywheel power supply method described in the second aspect.

[0030] The flywheel power supply system, method, device and medium provided by the embodiments of the present invention, the system includes: a rectifier boost circuit and an inverter circuit; the rectifier boost circuit includes: a rectifier module and a voltage conversion module, and the rectifier module and the voltage conversion module form a three-phase PFC topology; the rectifier module is respectively electrically connected to the power grid and the voltage conversion module; the voltage conversion module is also electrically connected to the inverter circuit; the inverter circuit is also electrically connected to the flywheel; the rectifier module is used to obtain an initial voltage from the power grid, rectify the initial voltage to obtain a first target voltage, and send the first target voltage to the voltage conversion module; the voltage conversion module is used to convert the first target voltage into a second target voltage, and send the second target voltage to the inverter circuit, and the voltage value of the second target voltage is greater than the voltage value of the first target voltage; the inverter circuit is used to convert the second target voltage into a third target voltage, and charge the flywheel with the third target voltage, and the voltage value of the third target voltage meets a preset voltage condition. The flywheel power supply system provided by the present application replaces the boost transformer and the energy storage converter in the traditional flywheel power supply system with a rectifier boost circuit integrated with a rectifier module and a voltage conversion module, reducing the equipment cost while improving the energy conversion efficiency.

[0031] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given, and detailed descriptions are made in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 Shows a structural schematic diagram of a traditional flywheel power supply system;

[0034] Figure 2 Shows a structural schematic diagram of the flywheel power supply system provided by the embodiments of the present application;

[0035] Figure 3 Shows a circuit schematic diagram of the rectifier module provided by the embodiments of the present application;

[0036] Figure 4 Shows a three-phase PFC topology diagram formed by the rectifier module and the voltage conversion module provided by the embodiments of the present application;

[0037] Figure 5 It shows a circuit schematic diagram of an inverter circuit provided by an embodiment of the present application;

[0038] Figure 6 It shows a schematic flow chart of a flywheel power supply method provided by an embodiment of the present application;

[0039] Figure 7 It shows a schematic structural diagram of an electronic device provided by an embodiment of the present application.

[0040] Main element symbol description:

[0041] 200 - Flywheel power supply system; 210 - Rectifier boost circuit; 211 - Rectifier module; 212 - Voltage conversion module; 220 - Inverter circuit; 300 - Power grid; 400 - Flywheel; 700 - Electronic device; 701 - Transceiver; 702 - Processor; 703 - Memory. Detailed implementation manners

[0042] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as a limitation to the present invention.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of the template herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0045] Embodiment 1

[0046] A flywheel is a mechanical energy storage device that stores kinetic energy by being driven to rotate at a high speed by electric energy. Please refer to Figure 1, the traditional flywheel power supply system generally consists of a step-up transformer, an energy storage converter, and a machine-side inverter. Specifically, one side of the step-up transformer is electrically connected to the power grid, and the other side is electrically connected to one side of the energy storage converter. The other side of the energy storage converter is electrically connected to the machine-side inverter, and the other side of the machine-side inverter is electrically connected to the flywheel. The step-up transformer obtains an AC voltage from the power grid, such as 380V AC voltage, and performs a step-up process on the AC voltage to obtain a stepped-up AC voltage, such as 750V AC voltage; then, the energy storage converter obtains the stepped-up AC voltage from the step-up transformer and rectifies the stepped-up AC voltage to obtain a DC voltage, such as 1500V DC voltage; finally, the machine-side inverter converts the DC voltage into a target AC voltage, such as 690V AC voltage, and drives the flywheel energy storage with the 690V AC voltage. The flywheel power supply system in the prior art generally adopts a multi-stage voltage conversion structure such as "< This kind of multi-stage voltage conversion structure has high equipment cost and low energy efficiency. For this, please refer to Figure 2 , an embodiment of the present application provides a flywheel power supply system 200, including: a control circuit, a rectification and boost circuit 210, and an inversion circuit 220; the rectification and boost circuit 210 includes: a rectification module 211 and a voltage conversion module 212, and the rectification module 211 and the voltage conversion module 212 constitute a three-phase power factor correction topology (PFC, Power Factor Correction); the rectification module 211 is respectively electrically connected to the power grid 300 and the voltage conversion module 212; the voltage conversion module 212 is also electrically connected to the inversion circuit 220; the inversion circuit 220 is also electrically connected to the flywheel 400; the control circuit is respectively electrically connected to the rectification module 211, the voltage conversion module 212, and the inversion circuit 220;

[0047] The rectification module 211 is configured to obtain an initial voltage from the power grid 300, rectify the initial voltage to obtain a first target voltage, and send the first target voltage to the voltage conversion module 212; the voltage conversion module 212 is configured to convert the first target voltage into a second target voltage, and send the second target voltage to the inversion circuit 220, and the voltage value of the second target voltage is greater than the voltage value of the first target voltage; the inversion circuit 220 is configured to convert the second target voltage into a third target voltage, and charge the flywheel 400 with the third target voltage, and the voltage value of the third target voltage meets a preset voltage condition.

[0048] In this embodiment, the rectifier boost circuit 210 includes a rectification module 211 and a voltage conversion module 212. The rectification module 211 and the voltage conversion module 212 form a three-phase PFC topology. The rectifier boost circuit 210 is used to obtain an initial voltage, such as a 380V AC voltage, from the power grid 300, and rectify and boost the initial voltage to obtain a second target voltage, such as a 1500V DC voltage. Specifically, the rectification module 211 in the rectifier boost circuit 210 rectifies the initial voltage to obtain a first target voltage, such as a 540V DC voltage, and then the voltage conversion module 212 converts the first target voltage into a second target voltage. The inverter circuit 220 further converts the second target voltage into a third target voltage that meets the preset voltage condition and supplies it to the flywheel 400 for charging. Here, the preset voltage condition is that the voltage amplitude of the third target voltage is the voltage amplitude that meets the charging of the flywheel 400.

[0049] It can be understood that the rectification module 211 and the voltage conversion module 212 are integrated in the rectifier boost circuit 210. By replacing the boost transformer and the energy storage converter in the traditional flywheel power supply system 200 with the rectifier boost circuit 210, the equipment cost and the floor area of the equipment are reduced. At the same time, the multi-stage conversion of energy is reduced, and the energy conversion efficiency is improved.

[0050] It should be noted that the rectifier boost circuit 210 is composed of a rectification module 211 and a voltage conversion module 212 that form a three-phase PFC topology. In this embodiment, the rectifier boost circuit 210, as a whole, realizes a first-level energy conversion from the initial voltage to the second target voltage. In this application, by replacing the boost transformer and the energy storage converter in the traditional flywheel power supply system 200 with the rectifier boost circuit 210, while reducing the equipment cost, the energy conversion efficiency is also improved. Specifically, taking a 100kW system as an example, compared with the traditional flywheel power supply system 200, the equipment cost of the flywheel power supply system 200 provided in this application can be saved by 120,000 yuan, the system volume is reduced by 25%, the overall efficiency is increased from the original 92% to 96%, and the annual maintenance cost is reduced by 40%.

[0051] In an embodiment, please refer to Figure 3 , Figure 3 FIG. shows a circuit schematic diagram of the rectification module 211 provided in the embodiment of the present application. The rectification module 211 includes: a first switch tube S1, a second switch tube S2, a third switch tube S3, a fourth switch tube S4, a fifth switch tube S5, and a sixth switch tube S6;

[0052] The input ends of the first switch tube S1, the third switch tube S3, and the fifth switch tube S5 are respectively electrically connected to the positive input end P of the inverter circuit 220;

[0053] The output terminals of the second switching transistor S2, the fourth switching transistor S4, and the sixth switching transistor S6 are respectively electrically connected to the negative input terminal N of the inverter circuit 220;

[0054] The output terminal of the first switching transistor S1 and the input terminal of the second switching transistor S2 are respectively electrically connected to the first-phase output a of the power grid 300;

[0055] The output terminal of the third switching transistor S3 and the input terminal of the fourth switching transistor S4 are respectively electrically connected to the second-phase output b of the power grid 300;

[0056] The output terminal of the fifth switching transistor S5 and the input terminal of the sixth switching transistor S6 are respectively electrically connected to the third-phase output c of the power grid 300.

[0057] In this embodiment, the frequencies of the first-phase output a, the second-phase output b, and the third-phase output c of the power grid 300 are the same, the amplitudes are equal, and the phases are successively different by 120°, that is, the initial voltage output by the power grid 300 is a three-phase AC voltage. The initial voltage output by the power grid 300 is rectified by the rectification module 211 to obtain a first target voltage, and the first target voltage is a DC voltage. It can be understood that since the first target voltage is a DC voltage, the magnitude and waveform of the first target voltage can be adjusted by controlling the turn-off frequencies of the first switching transistor S1, the second switching transistor S2, the third switching transistor S3, the fourth switching transistor S4, the fifth switching transistor S5, and the sixth switching transistor S6.

[0058] It should be noted that in this embodiment, the first switching transistor S1, the second switching transistor S2, the third switching transistor S3, the fourth switching transistor S4, the fifth switching transistor S5, and the sixth switching transistor S6 are all selected as insulated gate bipolar transistors (IGBTs, Insulated Gate Bipolar Transistors). In other embodiments, fast recovery diodes can also be selected.

[0059] In an implementation manner, please refer to again Figure 3 , the rectification module 211 further includes: a filtering unit C; a first end of the filtering unit C is electrically connected to the positive input terminal P of the inverter circuit 220, and a second end of the filtering unit C is electrically connected to the negative input terminal N of the inverter circuit 220.

[0060] In this embodiment, after the initial voltage input by the power grid 300 is rectified by the rectification module 211 to obtain a DC voltage, in order to smooth the output voltage and reduce the ripple, a filtering unit C is connected in parallel between the positive and negative output terminals of the voltage to filter the rectified voltage.

[0061] In an implementation manner, please refer to Figure 4 , Figure 4The figure shows a three-phase PFC topology structure composed of a rectification module 211 and a voltage conversion module 212. The voltage conversion module 212 includes: a first energy storage inductor La, a second energy storage inductor Lb, and a third energy storage inductor Lc;

[0062] The first end of the first energy storage inductor La is electrically connected to the first-phase output a of the power grid 300, and the second end of the first energy storage inductor La is electrically connected to the output end of the first switch tube S1 and the input end of the second switch tube S2 respectively;

[0063] The first end of the second energy storage inductor Lb is electrically connected to the second-phase output b of the power grid 300, and the second end of the second energy storage inductor Lb is electrically connected to the output end of the third switch tube S3 and the input end of the fourth switch tube S4 respectively;

[0064] The first end of the third energy storage inductor Lc is electrically connected to the third-phase output c of the power grid 300, and the second end of the third energy storage inductor Lc is electrically connected to the output end of the fifth switch tube S5 and the input end of the sixth switch tube S6 respectively.

[0065] It should be noted that in the three-phase PFC topology structure, each energy storage inductor is mainly used for energy storage and conversion, so that the output voltage waveform is closer to a sine wave, thereby improving the power factor and reducing harmonics.

[0066] In an embodiment, please refer to again Figure 4 , the voltage conversion module 212 further includes: a seventh switch unit S7, an eighth switch unit S8, a ninth switch unit S9, a tenth switch unit S10, an eleventh switch unit S11, and a twelfth switch unit S12;

[0067] The input end of the seventh switch unit S7 is electrically connected to the second end of the first energy storage inductor La, and the output end of the seventh switch unit S7 is electrically connected to the output end of the eighth switch unit S8; the input end of the eighth switch unit S8 is connected to the neutral point M;

[0068] The input end of the ninth switch unit S9 is electrically connected to the second end of the second energy storage inductor Lb, and the output end of the ninth switch unit S9 is electrically connected to the output end of the tenth switch unit S10; the input end of the tenth switch unit S10 is electrically connected to the neutral point M;

[0069] The input end of the eleventh switch unit S11 is electrically connected to the second end of the third energy storage inductor Lc, and the output end of the eleventh switch unit S11 is electrically connected to the output end of the twelfth switch unit S12; the input end of the twelfth switch unit S12 is electrically connected to the neutral point M.

[0070] In this embodiment, the seventh switch unit S7, the eighth switch unit S8, the ninth switch unit S9, the tenth switch unit S10, the eleventh switch unit S11, and the twelfth switch unit S12 all use IGBT tubes. The seventh switch unit S7, the eighth switch unit S8, the ninth switch unit S9, the tenth switch unit S10, the eleventh switch unit S11, and the twelfth switch unit S12 together with the first energy storage inductor La, the second energy storage inductor Lb, and the third energy storage inductor Lc constitute a voltage conversion module 212 for Boost boosting.

[0071] Specifically, taking the first-phase input a as an example, with the neutral point M grounded, when the seventh switch tube S7 and the eighth switch tube S8 are turned on, the first energy storage inductor La starts to store energy. When the seventh switch tube S7 and the eighth switch tube S8 are turned off, the first energy storage inductor La releases the previously stored electrical energy to achieve Boost boosting. It should be noted that the on and off times of the seventh switch tube S7 and the eighth switch tube S8 are specifically determined according to the boosting ratio.

[0072] In an embodiment, the filtering unit C includes: a first filtering capacitor C1 and a second filtering capacitor C2; a first end of the first filtering capacitor C1 is electrically connected to the positive input terminal P of the inverter circuit 220, and a second end of the first filtering capacitor C1 is electrically connected to the neutral point M; a first end of the second filtering capacitor C2 is electrically connected to the neutral point M, and a second end of the second filtering capacitor C2 is electrically connected to the negative input terminal N of the inverter circuit 220.

[0073] In this embodiment, the first filtering capacitor C1 and the second filtering capacitor C2 constitute a voltage dividing and filtering circuit for smoothing the voltage output to the inverter circuit 220 to ensure that the inverter circuit 220 obtains a stable second target voltage.

[0074] Further, please refer to Figure 5 , Figure 5 which shows a circuit schematic diagram of the inverter circuit 220 provided in the embodiment of the present application. The inverter circuit 220 includes a three-level active neutral point clamped topology structure composed of multiple switch tubes, such as: FPS150HA124GA002. Figure 5 where V+ is electrically connected to the positive pole of the output terminal of the voltage conversion module, V- is electrically connected to the negative pole of the output terminal of the voltage conversion module, and A, B, and C are respectively electrically connected to different phase lines of the flywheel.

[0075] In one embodiment, the system further includes: a control circuit, which includes a monitoring unit and a control unit; the monitoring unit is electrically connected to the power grid 300 and the control unit respectively; the control unit is also electrically connected to the control ends of the respective switching units; the monitoring unit is configured to monitor a plurality of preset power grid 300 parameters and send each of the preset power grid 300 parameters to the control unit; the control unit is configured to send corresponding control signals to the respective switching units according to each of the preset power grid 300 parameters.

[0076] In this embodiment, the monitoring unit is connected to the power grid 300 and is responsible for monitoring a plurality of preset parameters (such as voltage, frequency, etc.) of the power grid 300 in real time and sending these parameter data to the control unit. The control unit calculates and generates corresponding control signals according to the received power grid 300 parameter data, and then sends these control signals to the control ends of the respective switching units to dynamically adjust the working states of the switching units to ensure the stable operation of the system and the stability of the output voltage. The control unit processor includes: a digital signal processor (DSP, Digital Signal Processor) and a field programmable gate array (FPGA, Field-Programmable Gate Array), where the model of the DSP is TMS320F28335 and the model of the FPGA is XC6SLX9. The control signals include; space vector pulse width modulation (SVPWM) signals. The isolation optocoupler model is HCPL-2231.

[0077] The flywheel power supply system provided by the embodiment of the present application includes: a rectification and boost circuit and an inversion circuit; the rectification and boost circuit includes: a rectification module and a voltage conversion module, and the rectification module and the voltage conversion module form a three-phase PFC topology; the rectification module is electrically connected to the power grid and the voltage conversion module respectively; the voltage conversion module is also electrically connected to the inversion circuit; the inversion circuit is also electrically connected to the flywheel; the rectification module is configured to obtain an initial voltage from the power grid and rectify the initial voltage to obtain a first target voltage and send the first target voltage to the voltage conversion module; the voltage conversion module is configured to convert the first target voltage into a second target voltage and send the second target voltage to the inversion circuit, and the voltage value of the second target voltage is greater than the voltage value of the first target voltage; the inversion circuit is configured to convert the second target voltage into a third target voltage and charge the flywheel with the third target voltage, and the voltage value of the third target voltage meets a preset voltage condition. The flywheel power supply system provided by the present application replaces the boost transformer and the energy storage converter in the traditional flywheel power supply system with a rectification and boost circuit integrated with a rectification module and a voltage conversion module, reducing the equipment cost while also improving the energy conversion efficiency.

[0078] Example 2

[0079] In addition, please refer to Figure 6 , this embodiment of the present application also provides a method for supplying power to the flywheel 400, which is applied to the flywheel power supply system 200 described in Embodiment 1. The method includes steps S610 to S630.

[0080] Step S610, the rectification module 211 obtains an initial voltage from the power grid 300, rectifies the initial voltage to obtain a first target voltage, and sends the first target voltage to the voltage conversion module 212.

[0081] Step S620, the voltage conversion module 212 converts the first target voltage into the second target voltage, and sends the second target voltage to the inverter circuit 220. The voltage value of the second target voltage is greater than the voltage value of the first target voltage.

[0082] Step S630, the inverter circuit 220 converts the second target voltage into a third target voltage, and charges the flywheel 400 with the third target voltage. The voltage value of the third target voltage meets the preset voltage condition.

[0083] This embodiment of the present application also provides a method for supplying power to the flywheel 400, which is applied to the flywheel power supply system 200 described in Embodiment 1. To avoid repetition, it will not be elaborated here.

[0084] The flywheel power supply method provided by the present application obtains an initial voltage from the power grid through a rectification module, rectifies the initial voltage to obtain a first target voltage, and sends the first target voltage to the voltage conversion module; the voltage conversion module converts the first target voltage into the second target voltage and sends the second target voltage to the inverter circuit. The voltage value of the second target voltage is greater than the voltage value of the first target voltage; the inverter circuit converts the second target voltage into a third target voltage and charges the flywheel with the third target voltage. The voltage value of the third target voltage meets the preset voltage condition, reducing the equipment cost while also improving the energy conversion efficiency.

[0085] Example 3

[0086] In addition, this embodiment of the present invention provides an electronic device 700, including a memory 703 and a processor 702. The memory 703 stores a computer program, and when the computer program runs on the processor 702, it executes the method for supplying power to the flywheel 400 provided in Embodiment 2.

[0087] Specifically, please refer to Figure 7, the electronic device 700 includes: a transceiver 701, a bus interface, and a processor 702. The processor 702 is configured to obtain an initial voltage from the power grid by a rectification module, rectify the initial voltage to obtain a first target voltage, and send the first target voltage to a voltage conversion module; the voltage conversion module converts the first target voltage into the second target voltage and sends the second target voltage to an inverter circuit, where the voltage value of the second target voltage is greater than the voltage value of the first target voltage; the inverter circuit converts the second target voltage into a third target voltage and charges a flywheel with the third target voltage, and the voltage value of the third target voltage meets a preset voltage condition.

[0088] In an embodiment of the present invention, the electronic device 700 further includes: a memory 703. In Figure 7 , the bus architecture may include any number of interconnected buses and bridges, specifically, various circuits represented by one or more processors 702 represented by the processor 702 and a memory 703 represented by the memory 703 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, and thus will not be further described herein. The bus interface provides an interface. The transceiver 701 may be multiple elements, that is, including a transmitter and a receiver, and provides a unit for communicating with various other devices on a transmission medium. The processor 702 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 702 when performing operations.

[0089] The electronic device 700 provided in the embodiment of the present invention can execute the flywheel power supply method provided in the above method embodiment 1. To avoid repetition, it will not be elaborated herein.

[0090] Embodiment 4

[0091] In addition, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the flywheel power supply method provided in Embodiment 2 is implemented.

[0092] In this embodiment, the computer-readable storage medium may be a read-only memory (ROM for short), a random access memory (RAM for short), a magnetic disk, or an optical disc, etc.

[0093] The computer-readable storage medium provided in this embodiment can implement the flywheel power supply method provided in Embodiment 2. To avoid repetition, it will not be elaborated herein.

[0094] In all the examples shown and described herein, any specific values should be construed as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values.

[0095] It should be noted that like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0096] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. A flywheel power supply system, characterized in that, The system includes: a rectifier-booster circuit and an inverter circuit; the rectifier-booster circuit includes: a rectifier module and a voltage conversion module, and the rectifier module and the voltage conversion module form a three-phase PFC topology; The rectifier module is electrically connected to the power grid and the voltage conversion module respectively; The voltage conversion module is also electrically connected to the inverter circuit; The inverter circuit is also electrically connected to the flywheel; The rectifier module is configured to obtain an initial voltage from the power grid, rectify the initial voltage to obtain a first target voltage, and send the first target voltage to the voltage conversion module; The voltage conversion module is configured to convert the first target voltage into a second target voltage, and send the second target voltage to the inverter circuit, where the voltage value of the second target voltage is greater than the voltage value of the first target voltage; The inverter circuit is configured to convert the second target voltage into a third target voltage, and charge the flywheel with the third target voltage, where the voltage value of the third target voltage meets a preset voltage condition.

2. The flywheel power supply system according to claim 1, wherein The rectifier module includes: a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, and a sixth switch tube; The input ends of the first switch tube, the third switch tube, and the fifth switch tube are electrically connected to the positive input end of the inverter circuit respectively; The output ends of the second switch tube, the fourth switch tube, and the sixth switch tube are electrically connected to the negative input end of the inverter circuit respectively; The output end of the first switch tube and the input end of the second switch tube are electrically connected to the first-phase output of the power grid respectively; The output end of the third switch tube and the input end of the fourth switch tube are electrically connected to the second-phase output of the power grid respectively; The output end of the fifth switch tube and the input end of the sixth switch tube are electrically connected to the third-phase output of the power grid respectively.

3. The flywheel power supply system according to claim 2, wherein The rectifier module further includes: a filtering unit; The first end of the filtering unit is electrically connected to the positive input end of the inverter circuit, and the second end of the filtering unit is electrically connected to the negative input end of the inverter circuit.

4. The flywheel power supply system according to claim 3, characterized in that The voltage conversion module includes: a first energy storage inductor, a second energy storage inductor, and a third energy storage inductor; The first end of the first energy storage inductor is electrically connected to the first-phase output of the power grid, and the second end of the first energy storage inductor is electrically connected to the output end of the first switch tube and the input end of the second switch tube respectively; The first end of the second energy storage inductor is electrically connected to the second-phase output of the power grid, and the second end of the second energy storage inductor is electrically connected to the output end of the third switch tube and the input end of the fourth switch tube respectively; The first end of the third energy storage inductor is electrically connected to the third-phase output of the power grid, and the second end of the third energy storage inductor is electrically connected to the output end of the fifth switch tube and the input end of the sixth switch tube respectively.

5. The flywheel power supply system according to claim 4, wherein, The voltage conversion module further includes: a seventh switch unit, an eighth switch unit, a ninth switch unit, a tenth switch unit, an eleventh switch unit, and a twelfth switch unit; The input end of the seventh switching unit is electrically connected to the second end of the first energy storage inductor, and the output end of the seventh switching unit is electrically connected to the output end of the eighth switching unit; The input end of the eighth switching unit is connected to the neutral point; The input end of the ninth switching unit is electrically connected to the second end of the second energy storage inductor, and the output end of the ninth switching unit is electrically connected to the output end of the tenth switching unit; The input end of the tenth switching unit is electrically connected to the neutral point; The input end of the eleventh switching unit is electrically connected to the second end of the third energy storage inductor, and the output end of the eleventh switching unit is electrically connected to the output end of the twelfth switching unit; The input end of the twelfth switching unit is electrically connected to the neutral point.

6. The flywheel power supply system according to claim 5, characterized in that, The filtering unit includes: a first filtering capacitor and a second filtering capacitor; The first end of the first filtering capacitor is electrically connected to the positive input end of the inverter circuit, and the second end of the first filtering capacitor is electrically connected to the neutral point; The first end of the second filtering capacitor is electrically connected to the neutral point, and the second end of the second filtering capacitor is electrically connected to the negative input end of the inverter circuit.

7. The flywheel power supply system according to claim 6, characterized in that, The system further includes: a control circuit, and the control circuit includes: a monitoring unit and a control unit; The monitoring unit is electrically connected to the power grid and the control unit respectively; The control unit is further electrically connected to the control ends of the respective switching units; The monitoring unit is configured to monitor a plurality of preset power grid parameters and send the respective preset power grid parameters to the control unit; The control unit is configured to send corresponding control signals to the respective switching units according to the respective preset power grid parameters.

8. A flywheel power supply method, characterized in that, Applied to the flywheel power supply system according to any one of claims 1-7, the method includes: The rectification module obtains an initial voltage from the power grid, rectifies the initial voltage to obtain a first target voltage, and sends the first target voltage to the voltage conversion module; The voltage conversion module converts the first target voltage into the second target voltage, and sends the second target voltage to the inverter circuit, and the voltage value of the second target voltage is greater than the voltage value of the first target voltage; The inverter circuit converts the second target voltage into a third target voltage, and charges the flywheel with the third target voltage, and the voltage value of the third target voltage meets a preset voltage condition.

9. An electronic device, characterized in that, Comprising a memory and a processor, the memory stores a computer program, and the computer program executes the flywheel power supply method according to claim 8 when running on the processor.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and the computer program realizes the flywheel power supply method according to claim 8 when executed by a processor.

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