Flywheel power supply system and control method thereof

Abstract

The present invention provides a flywheel power supply system and a control method thereof, which are applied to a flywheel control device, and the flywheel power supply system includes: a mains input circuit, a DC bus voltage input circuit, a flywheel side AC voltage input circuit, a super capacitor input circuit, and a power distribution system; the power distribution system is used to determine a target power supply circuit from the mains input circuit, the DC bus voltage input circuit, the flywheel side AC voltage input circuit, and the super capacitor input circuit according to the flywheel speed of the flywheel energy storage device, so as to supply power to the flywheel control device based on the determined target power supply circuit. The flywheel power supply system allocates the target power supply circuit through the power distribution system, thereby ensuring that the power supply of the core control board of the flywheel control device is uninterrupted before the flywheel rotor stops.

Description

Technical Field

[0001] The invention relates to power supply of an electric power system, and in particular to a flywheel power supply system and a control method thereof. Background Art

[0002] The flywheel control device generally includes the following components: an electronic control unit, a magnetic bearing control unit, and a monitoring unit. During the rotation of the flywheel rotor, the core control board of the flywheel control device is not allowed to lose power, otherwise it is easy to cause the flywheel rotor to fall, thus causing a safety hazard.

[0003] At present, the power supply method for the core control board of the above-mentioned flywheel control device usually adopts a battery-based UPS power supply. The battery-based UPS power supply includes a mains power supply and a battery power supply. The mains power supply is usually used for power supply. When the mains power supply fails, the battery power supply is used for power supply.

[0004] The existing battery-based UPS power supply has the following two defects: first, in order to ensure the power supply time, the UPS power supply needs to use a battery device, and the battery has a certain risk of explosion and a large hidden danger; second, the UPS power supply generally cannot be equipped with a large-capacity battery, otherwise the cost and volume will increase sharply. Since the battery capacity is limited, and the flywheel rotor needs a long time from a rotating state to a stopped state, ranging from a few minutes to more than ten minutes, the UPS power supply cannot guarantee the power supply of the flywheel rotor before it stops to a certain extent. Therefore, only using a battery-based UPS power supply still has the problem of power failure of the core control board. Summary of the invention

[0005] The object of the present invention is to provide a flywheel power supply system and a control method thereof, so as to avoid power failure of a core control board of a flywheel control device during the operation of the flywheel.

[0006] In a first aspect, an embodiment of the present invention provides a flywheel power supply system, which is applied to a flywheel control device, and the flywheel power supply system includes: a mains input circuit, a DC bus voltage input circuit, a flywheel side AC voltage input circuit, a super capacitor input circuit and a power distribution system; the mains input circuit, the DC bus voltage input circuit, the flywheel side AC voltage input circuit and the super capacitor input circuit are respectively connected to the power distribution system; the mains input circuit is used to provide a mains power supply; the DC bus voltage input circuit is used to convert the output voltage of an external flywheel energy storage device into DC to provide it to the power distribution system; the flywheel side AC voltage input circuit is used to convert the three-phase AC voltage output by the flywheel energy storage device into DC to provide it to the power distribution system; the super capacitor input circuit is used to provide a DC voltage; the power distribution system is used to determine a target power supply circuit from the mains input circuit, the DC bus voltage input circuit, the flywheel side AC voltage input circuit and the super capacitor input circuit according to the flywheel speed of the flywheel energy storage device, so as to power the flywheel control device based on the determined target power supply circuit.

[0007] In combination with the first aspect, an embodiment of the present invention provides a first possible implementation scheme of the first aspect, wherein, when the flywheel speed of the flywheel energy storage device is within a first preset range, the power distribution system determines the AC input circuit or the DC bus voltage input circuit as the target power supply circuit, and supplies power to the flywheel control device based on the AC input circuit or the DC bus voltage input circuit.

[0008] In combination with the first aspect, an embodiment of the present invention provides a second possible implementation of the first aspect, wherein, when the flywheel speed of the flywheel energy storage device is in a second preset range, the power distribution system determines the flywheel side AC voltage input circuit as the target power supply circuit, and powers the flywheel control device based on the flywheel side AC voltage input circuit.

[0009] In combination with the first aspect, an embodiment of the present invention provides a third possible implementation of the first aspect, wherein, when the flywheel speed of the flywheel energy storage device is within a third preset range, the power distribution system determines the supercapacitor input circuit as the target power supply circuit, and supplies power to the flywheel control device based on the supercapacitor input circuit.

[0010] In combination with the first aspect, an embodiment of the present invention provides a fourth possible implementation method of the first aspect, wherein the AC power input circuit includes: a first AC voltage output circuit and a second AC voltage output circuit; the output voltage amplitude of the first AC voltage output circuit is 110V; the output voltage amplitude of the second AC voltage output circuit is 24V.

[0011] In combination with the first aspect, an embodiment of the present invention provides a fifth possible implementation of the first aspect, wherein the DC bus voltage input circuit includes: a first DC regulated power supply output circuit and a second DC regulated power supply output circuit; the output voltage of the first DC regulated power supply output circuit is 110V; the output voltage of the second DC regulated power supply output circuit is 24V.

[0012] In combination with the fifth possible implementation of the first aspect, an embodiment of the present invention provides a sixth possible implementation of the first aspect, wherein the DC bus voltage input circuit is connected to the flywheel energy storage device through the DC bus terminal block of the flywheel converter of the flywheel energy storage device; the voltage range of the DC bus terminal block is 200V to 800V.

[0013] In combination with the sixth possible implementation of the first aspect, an embodiment of the present invention provides a seventh possible implementation of the first aspect, wherein the flywheel side AC voltage input circuit includes: a first DC voltage output circuit and a second DC voltage output circuit; the output voltage of the first DC voltage output circuit is 110V; the output voltage of the second DC voltage output circuit is 24V.

[0014] In combination with the first aspect, an embodiment of the present invention provides an eighth possible implementation of the first aspect, wherein the supercapacitor input circuit includes: a third DC voltage output circuit and a fourth DC voltage output circuit; the output voltage of the third DC voltage output circuit is 110V; the output voltage of the fourth DC voltage output circuit is 24V.

[0015] In a second aspect, an embodiment of the present invention provides a control method for a flywheel power supply system, wherein the flywheel power supply system applied to any one of the first aspect to the eighth possible implementation manner of the first aspect comprises: obtaining a flywheel speed of an external flywheel energy storage device; if the flywheel speed of the flywheel energy storage device is within a first preset range, controlling the power distribution system to determine the AC input circuit or the DC bus voltage input circuit as a target power supply circuit, and powering the flywheel control device based on the AC input circuit or the DC bus voltage input circuit; if the flywheel speed of the flywheel energy storage device is within a second preset range, controlling the power distribution system to determine the flywheel-side AC voltage input circuit as a target power supply circuit, and powering the flywheel control device based on the flywheel-side AC voltage input circuit; if the flywheel speed of the flywheel energy storage device is within a third preset range, controlling the power distribution system to determine the supercapacitor input circuit as a target power supply circuit, and powering the flywheel control device based on the supercapacitor input circuit; if the flywheel speed of the flywheel energy storage device is within a preset speed stop range, controlling the flywheel power supply system to shut down.

[0016] The embodiments of the present invention bring the following beneficial effects:

[0017] A flywheel power supply system and a control method thereof provided in an embodiment of the present invention are applied to a flywheel control device, wherein the flywheel power supply system comprises: a mains input circuit, a DC bus voltage input circuit, a flywheel side AC voltage input circuit, a super capacitor input circuit and a power distribution system; the mains input circuit, the DC bus voltage input circuit, the flywheel side AC voltage input circuit and the super capacitor input circuit are respectively connected to the power distribution system; the mains input circuit is used to provide a mains power supply; the DC bus voltage input circuit is used to convert the output voltage of an external flywheel energy storage device into DC to provide it to the power distribution system; the flywheel side AC voltage input circuit is used to convert the three-phase AC voltage output by the flywheel energy storage device into DC to provide it to the power distribution system; the super capacitor input circuit is used to provide a DC voltage; the power distribution system is used to determine a target power supply circuit from the mains input circuit, the DC bus voltage input circuit, the flywheel side AC voltage input circuit and the super capacitor input circuit according to the flywheel speed of the flywheel energy storage device, so as to power the flywheel control device based on the determined target power supply circuit. The flywheel power supply system allocates the target power supply circuit through the power distribution system, thereby ensuring uninterrupted power supply to the core control board of the flywheel control device before the flywheel rotor stops.

[0018] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0019] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a flywheel power supply system provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of another flywheel power supply system structure provided by an embodiment of the present invention;

[0023] Figure 3A schematic diagram of the structure of a power distribution system provided by an embodiment of the present invention;

[0024] Figure 4 The present invention provides a flow chart of a control method for a flywheel power supply system.

[0025] Icons: 11-mains input circuit; 12-DC bus voltage input circuit; 13-flywheel side AC voltage input circuit; 14-supercapacitor input circuit; 15-power distribution system; 16-flywheel control device. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the prior art, the power supply method for the core control board of the above-mentioned flywheel control device usually adopts a battery-based UPS power supply for power supply. The battery-based UPS power supply includes a mains power supply and a battery power supply. The mains power supply is usually used for power supply, and when the mains power supply is powered off, the battery power supply is used for power supply. The existing battery-based UPS power supply has the following two defects: first, in order to ensure the power supply time, a battery device such as a large-capacity storage battery must be used, and when the battery capacity is large, there is a certain risk of explosion and a large hidden danger; second, the UPS power supply cannot be equipped with a large-capacity battery, otherwise the cost and volume will increase sharply. Since the battery capacity is limited, it takes a long time for the flywheel rotor to go from a rotating state to a stopped state, which can be as short as a few minutes or as long as more than ten minutes. The UPS power supply cannot guarantee the power supply of the flywheel rotor before it stops to a certain extent. Therefore, only using a battery-based UPS power supply still has the problem of power failure of the core control board.

[0028] Based on this, an embodiment of the present invention provides a flywheel power supply system and a control method thereof, which can alleviate the above technical problems to avoid power failure of the core control board of the flywheel control device during the operation of the flywheel. To facilitate understanding of this embodiment, a micro-motion exploration method disclosed in an embodiment of the present invention is first introduced in detail.

[0029] Example 1

[0030] like Figure 1As shown, it is a schematic diagram of the structure of a flywheel power supply system provided by an embodiment of the present invention, the system includes: a mains input circuit 11, a DC bus voltage input circuit 12, a flywheel side AC voltage input circuit 13, a super capacitor input circuit 14 and a power distribution system 15; the mains input circuit 11, the DC bus voltage input circuit 12, the flywheel side AC voltage input circuit 13 and the super capacitor input circuit 14 are respectively connected to the power distribution system 15.

[0031] Among them, the AC input circuit 11 is used to provide AC power; the DC bus voltage input circuit 12 is used to convert the output voltage of the external flywheel energy storage device into DC to provide it to the power distribution system 15; the flywheel side AC voltage input circuit 13 is used to convert the three-phase AC voltage output by the flywheel energy storage device into DC to provide it to the power distribution system 15; the supercapacitor input circuit 14 is used to provide DC voltage; the power distribution system 15 is used to determine the target power supply circuit from the AC input circuit, the DC bus voltage input circuit, the flywheel side AC voltage input circuit and the supercapacitor input circuit according to the flywheel speed of the flywheel energy storage device, so as to power the flywheel control device 16 based on the determined target power supply circuit.

[0032] Here, when the flywheel speed of the flywheel energy storage device is within a first preset range, the power distribution system determines the AC input circuit or the DC bus voltage input circuit as the target power supply circuit, and supplies power to the flywheel control device based on the AC input circuit or the DC bus voltage input circuit; when the flywheel speed of the flywheel energy storage device is within a second preset range, the power distribution system determines the flywheel side AC voltage input circuit as the target power supply circuit, and supplies power to the flywheel control device based on the flywheel side AC voltage input circuit; when the flywheel speed of the flywheel energy storage device is within a third preset range, the power distribution system determines the supercapacitor input circuit as the target power supply circuit, and supplies power to the flywheel control device based on the supercapacitor input circuit.

[0033] In actual operation, the flywheel rated speed of the flywheel energy storage device is 10500rpm, the operating speed is 4000rpm~10500rpm, and the shutdown speed is less than 4000rpm. Among them, the first preset range of the above-mentioned flywheel speed is 4000rpm~10500rpm. Further, when the mains input circuit loses power, the flywheel control device is powered by the DC bus voltage input circuit. Further, the second preset range of the above-mentioned flywheel speed is 2000rpm~4000rpm; the third preset range of the above-mentioned flywheel speed is 100rpm~2000rpm.

[0034] In one possible implementation, the AC input circuit includes: a first AC voltage output circuit and a second AC voltage output circuit; the output voltage amplitude of the first AC voltage output circuit is 110V; the output voltage amplitude of the second AC voltage output circuit is 24V.

[0035] In another possible implementation, the DC bus voltage input circuit includes: a first DC regulated power supply output circuit and a second DC regulated power supply output circuit; the output voltage of the first DC regulated power supply output circuit is 110V; the output voltage of the second DC regulated power supply output circuit is 24V.

[0036] In this embodiment, the DC bus voltage input circuit is connected to the flywheel energy storage device through a DC bus terminal block of a flywheel converter of the flywheel energy storage device; the voltage range of the DC bus terminal block is 200V to 800V.

[0037] In one possible implementation, the flywheel-side AC voltage input circuit includes: a first DC voltage output circuit and a second DC voltage output circuit; the output voltage of the first DC voltage output circuit is 110V; the output voltage of the second DC voltage output circuit is 24V.

[0038] Furthermore, the supercapacitor input circuit includes: a third DC voltage output circuit and a fourth DC voltage output circuit; the output voltage of the third DC voltage output circuit is 110V; the output voltage of the fourth DC voltage output circuit is 24V.

[0039] For ease of understanding, Figure 2Another schematic diagram of the flywheel power supply system structure provided by an embodiment of the present invention. The flywheel power supply system specifically includes: a mains 220VAC input circuit, symbolized by VAC-1; a DC bus voltage input circuit, symbolized by VDC-1; a flywheel side voltage input circuit, symbolized by VAC-2; and a supercapacitor input circuit, symbolized by VDC-2. Among them, the VAC-1 is connected to the AC / AC power supply to generate an AC voltage VAC-3, wherein VAC-1 is an AC voltage with an amplitude of 220V; VAC-3 is an AC voltage with an amplitude of 220V; the AC voltage VAC-3 is respectively connected to a 110V DC regulated power supply to generate voltages of 110VDC output-1 and 24VDC output-1; the VDC-1 is respectively connected to two DC / DCs to generate voltages of 110VDC output-2 and 24VDC output-2; wherein the VDC-1 is connected to the DC bus terminal block of the flywheel converter, with a voltage range of 200V to 800VDC; the first DC / DC is a 110V DC regulated power supply, and the second DC / DC is a 24V DC regulated power supply; the VAC- 2 is connected to AC / DC to generate DC voltage VDC-3, wherein voltage VAC-2 is AC voltage with an amplitude range of 100~400VAC, and DC voltage VDC-3 has an amplitude range of 140~560VDC; DC voltage VDC-3 is respectively connected to 110V DC regulated power supply to generate voltage 110VDC output-3 and 24VDC output-3; VDC-2 is connected to DC / DC to generate DC voltage VDC-4, wherein VDC-2 is DC voltage with an amplitude range of 11V~110VDC, and DC voltage VDC-4 has an amplitude range of 110~220VDC; DC voltage VDC-4 is respectively connected to 110V DC regulated power supply to generate voltage 110VDC output-4 and 24VDC output-4. Furthermore, the flywheel control device is as shown in the figure: magnetic shaft system control unit, electric control unit and auxiliary monitoring unit.

[0040] Furthermore, Figure 3 A schematic diagram of a power distribution system structure provided by an embodiment of the present invention. The flywheel power supply system generates four 110V and 24V voltages, namely 110VDC output-1, 110VDC output-2, 110VDC output-3, 110VDC output-4 and 24VDC output-1, 24VDC output-2, 24VDC output-3, 24VDC output-4. The amplitudes of the eight voltages are designed as follows:

[0041] 110VDC output-1>110VDC output-2>110VDC output-3>110VDC output-4

[0042] 24VDC output-1>24VDC output-2>24VDC output-3>24VDC output-4

[0043] Since the diode has unidirectional conductivity, the eight groups of diodes with higher input voltage are turned on first, that is, the turn-on sequence is designed as follows, so that the eight power supplies can be connected to the flywheel control device separately.

[0044] A flywheel power supply system provided in an embodiment of the present invention is applied to a flywheel control device, and the flywheel power supply system includes: a mains input circuit, a DC bus voltage input circuit, a flywheel side AC voltage input circuit, a super capacitor input circuit and a power distribution system; the mains input circuit, the DC bus voltage input circuit, the flywheel side AC voltage input circuit and the super capacitor input circuit are respectively connected to the power distribution system; the mains input circuit is used to provide a mains power supply; the DC bus voltage input circuit is used to convert the output voltage of an external flywheel energy storage device into DC to provide it to the power distribution system; the flywheel side AC voltage input circuit is used to convert the three-phase AC voltage output by the flywheel energy storage device into DC to provide it to the power distribution system; the super capacitor input circuit is used to provide a DC voltage; the power distribution system is used to determine a target power supply circuit from the mains input circuit, the DC bus voltage input circuit, the flywheel side AC voltage input circuit and the super capacitor input circuit according to the flywheel speed of the flywheel energy storage device, so as to power the flywheel control device based on the determined target power supply circuit. The flywheel power supply system allocates the target power supply circuit through the power distribution system, thereby ensuring uninterrupted power supply to the core control board of the flywheel control device before the flywheel rotor stops.

[0045] Example 2

[0046] exist Figure 1 Based on the flywheel power supply system shown in the figure, the present invention also provides a control method for a flywheel power supply system, which is applied to the flywheel power supply system in embodiment 1. Figure 4 As shown, the present invention provides a flow chart of a control method of a flywheel power supply system, the method comprising the following steps:

[0047] Step S401: Acquire the flywheel speed of the external flywheel energy storage device.

[0048] Step S402: If the flywheel speed of the flywheel energy storage device is within a first preset range, control the power distribution system to determine the AC input circuit or the DC bus voltage input circuit as the target power supply circuit, and power the flywheel control device based on the AC input circuit or the DC bus voltage input circuit.

[0049] In actual operation, when the mains input circuit loses power, the flywheel control device is powered by the DC bus voltage input circuit.

[0050] Step S403: If the flywheel speed of the flywheel energy storage device is within a second preset range, control the power distribution system to determine the flywheel side AC voltage input circuit as the target power supply circuit, and power the flywheel control device based on the flywheel side AC voltage input circuit.

[0051] Step S404: if the flywheel speed of the flywheel energy storage device is within a third preset range, control the power distribution system to determine the supercapacitor input circuit as a target power supply circuit, and supply power to the flywheel control device based on the supercapacitor input circuit.

[0052] Step S405: If the flywheel speed of the flywheel energy storage device is within a preset speed stop range, the flywheel power supply system is controlled to shut down.

[0053] In this embodiment, the flywheel rated speed of the flywheel energy storage device is 10500rpm, the operating speed is 4000rpm~10500rpm, and the shutdown speed is less than 4000rpm. Among them, the first preset range of the above-mentioned flywheel speed is 4000rpm~10500rpm. Further, when the mains input circuit loses power, the flywheel control device is powered by the DC bus voltage input circuit. Further, the second preset range of the above-mentioned flywheel speed is 2000rpm~4000rpm; the third preset range of the above-mentioned flywheel speed is 100rpm~2000rpm. Further, the above-mentioned preset speed stop range is when the flywheel speed is below 100rpm, at which time the flywheel system has been safely counted, allowing the core control board to lose power.

[0054] A control method for a flywheel power supply system provided in an embodiment of the present invention comprises: obtaining a flywheel speed of an external flywheel energy storage device; if the flywheel speed of the flywheel energy storage device is within a first preset range, controlling the power distribution system to determine the AC input circuit or the DC bus voltage input circuit as a target power supply circuit, and supplying power to the flywheel control device based on the AC input circuit or the DC bus voltage input circuit; if the flywheel speed of the flywheel energy storage device is within a second preset range, controlling the power distribution system to determine the flywheel-side AC voltage input circuit as a target power supply circuit, and supplying power to the flywheel control device based on the flywheel-side AC voltage input circuit; if the flywheel speed of the flywheel energy storage device is within a third preset range, controlling the power distribution system to determine the supercapacitor input circuit as a target power supply circuit, and supplying power to the flywheel control device based on the supercapacitor input circuit; if the flywheel speed of the flywheel energy storage device is within a preset speed stop range, controlling the flywheel power supply system to shut down. The method uses the flywheel power supply system to adjust the target power supply circuit through a power distribution system, thereby ensuring that the power supply to the core control board of the flywheel control device is uninterrupted before the flywheel rotor stops.

[0055] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

Claims

1. A flywheel power supply system, characterized in that: Applied to a flywheel control device, the flywheel power supply system includes: a mains input circuit, a DC bus voltage input circuit, a flywheel side AC voltage input circuit, a supercapacitor input circuit and a power distribution system; the mains input circuit includes: a first AC voltage output circuit and a second AC voltage output circuit; the output voltage amplitude of the first AC voltage output circuit is 110V; the output voltage amplitude of the second AC voltage output circuit is 24V; the DC bus voltage input circuit includes: a first DC regulated power supply output circuit and a second DC regulated power supply output circuit; the output voltage of the first DC regulated power supply output circuit is 110V; the output voltage of the second DC regulated power supply output circuit is 2 4V; the DC bus voltage input circuit is connected to the flywheel energy storage device through the DC bus terminal block of the flywheel converter of the flywheel energy storage device; the voltage range of the DC bus terminal block is 200V~800V; the flywheel side AC voltage input circuit includes: a first DC voltage output circuit and a second DC voltage output circuit; the output voltage of the first DC voltage output circuit is 110V; the output voltage of the second DC voltage output circuit is 24V; the supercapacitor input circuit includes: a third DC voltage output circuit and a fourth DC voltage output circuit; the output voltage of the third DC voltage output circuit is 110V; the output voltage of the fourth DC voltage output circuit is 24V; The mains input circuit, the DC bus voltage input circuit, the flywheel side AC voltage input circuit and the supercapacitor input circuit are respectively connected to the power distribution system; The mains input circuit is used to provide mains power supply; The DC bus voltage input circuit is used to convert the output voltage of the flywheel energy storage device of the external device into DC to provide it to the power distribution system; The flywheel-side AC voltage input circuit is used to convert the three-phase AC voltage output by the flywheel energy storage device into DC to provide it to the power distribution system; The supercapacitor input circuit is used to provide a DC voltage; The power distribution system is used to determine a target power supply circuit from the mains input circuit, the DC bus voltage input circuit, the flywheel side AC voltage input circuit and the supercapacitor input circuit according to the flywheel speed of the flywheel energy storage device, so as to supply power to the flywheel control device based on the determined target power supply circuit; Wherein, when the flywheel speed of the flywheel energy storage device is within a first preset range, the power distribution system determines the AC input circuit or the DC bus voltage input circuit as a target power supply circuit, and supplies power to the flywheel control device based on the AC input circuit or the DC bus voltage input circuit; When the flywheel speed of the flywheel energy storage device is within a second preset range, the power distribution system determines the flywheel-side AC voltage input circuit as a target power supply circuit, and supplies power to the flywheel control device based on the flywheel-side AC voltage input circuit; When the flywheel speed of the flywheel energy storage device is within a third preset range, the power distribution system determines the supercapacitor input circuit as a target power supply circuit, and supplies power to the flywheel control device based on the supercapacitor input circuit.

2. A control method for a flywheel power supply system, characterized in that: Applied to the flywheel power supply system of claim 1, the method comprises: Obtain the flywheel speed of the external flywheel energy storage device; If the flywheel speed of the flywheel energy storage device is within a first preset range, controlling the power distribution system to determine the AC input circuit or the DC bus voltage input circuit as a target power supply circuit, and supplying power to the flywheel control device based on the AC input circuit or the DC bus voltage input circuit; If the flywheel speed of the flywheel energy storage device is within a second preset range, controlling the power distribution system to determine the flywheel-side AC voltage input circuit as a target power supply circuit, and supplying power to the flywheel control device based on the flywheel-side AC voltage input circuit; If the flywheel speed of the flywheel energy storage device is within a third preset range, controlling the power distribution system to determine the supercapacitor input circuit as a target power supply circuit, and supplying power to the flywheel control device based on the supercapacitor input circuit; If the flywheel speed of the flywheel energy storage device is within a preset speed stop range, the flywheel power supply system is controlled to shut down.

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