Inertia flywheel starting method and system, electronic equipment and storage medium

Abstract

The invention discloses an inertia flywheel starting method and system, electronic equipment and a storage medium, and the method comprises the steps: locking a rotor of a flywheel connected with an inner rotor of an electromagnetic coupler, and controlling the rotation of an outer rotor of the electromagnetic coupler through a variable-current controller connected with the electromagnetic coupler, the rotor of the synchronous phase modifier connected with the outer rotor of the electromagnetic coupler is driven to rotate; judging whether the synchronous phase modifier meets a grid-connected synchronization condition or not; in response to the condition that the synchronous phase modifier meets the grid-connected synchronization condition, unlocking a rotor of the flywheel, controlling an inner rotor of the electromagnetic coupler to rotate through the variable-current controller, and driving the rotor of the flywheel to rotate; and in response to the condition that the synchronous phase modifier does not meet the grid-connected synchronization condition, adjusting the synchronous phase modifier until the synchronous phase modifier meets the grid-connected synchronization condition. By means of the scheme, self-starting of the inertia flywheel can be completed through the electromagnetic coupler without an auxiliary motor, and starting is easier, more convenient and more reliable.

Description

Technical Field

[0001] This application generally relates to the field of energy storage technologies. More specifically, this application relates to a starting method, system, electronic device, and storage medium for an inertia flywheel. Background Art

[0002] With the continuous increase in the proportion of new energy power generation and power electronic devices connected to the power grid, grid-forming requirements such as inertia response, fast frequency regulation and voltage regulation, and transient support have become prominent. Against this background, the inertia flywheel system, as a short-term high-power physical energy storage technology, has shown significant advantages and development potential.

[0003] In the prior art, during the starting process of an inertia flywheel, an electric motor is usually used to drive the flywheel to accelerate to the operating speed for starting. However, due to the large moment of inertia of the flywheel, the starting burden of the system is increased. Especially when the motor capacity is limited, the excessive moment of inertia of the flywheel may cause the motor to fail to start normally. At the same time, the high starting current will cause an increase in the heat in the motor winding, accelerating the wear of the motor and shortening its service life.

[0004] In view of this, there is an urgent need to provide a starting scheme for an inertia flywheel that can achieve the starting of the inertia flywheel without an auxiliary motor, making the starting of the inertia flywheel more simple and reliable. Summary of the Invention

[0005] To at least solve one or more of the above-mentioned technical problems, this application proposes a fault-tolerant operation scheme for an inertia flywheel system in multiple aspects.

[0006] In a first aspect, this application provides a starting method for an inertia flywheel, including: locking the rotor of the flywheel connected to the inner rotor of the electromagnetic coupler, controlling the rotation of the outer rotor of the electromagnetic coupler through a variable current controller connected to the electromagnetic coupler, and driving the rotation of the rotor of the synchronous condenser connected to the outer rotor of the electromagnetic coupler; determining whether the synchronous condenser meets the grid connection synchronization condition; in response to the synchronous condenser meeting the grid connection synchronization condition, unlocking the rotor of the flywheel, controlling the rotation of the inner rotor of the electromagnetic coupler through the variable current controller, and driving the rotation of the rotor of the flywheel; in response to the synchronous condenser not meeting the grid connection synchronization condition, adjusting the synchronous condenser until it meets the grid connection synchronization condition.

[0007] In some embodiments, during the process of controlling the rotation of the outer rotor of the electromagnetic coupler through a variable current controller connected to the electromagnetic coupler, the variable current controller accelerates the outer rotor of the electromagnetic coupler by changing the frequency and magnitude of the current input to the outer rotor of the electromagnetic coupler.

[0008] In some embodiments, when the outer rotor of the electromagnetic coupler accelerates to the set speed, the acceleration of the outer rotor of the electromagnetic coupler is stopped.

[0009] In some embodiments, the set rotational speed is obtained through the frequency of the grid voltage.

[0010] In some embodiments, the grid connection synchronization condition is that the amplitude, phase angle, phase sequence, and frequency of the terminal voltage of the synchronous condenser are respectively consistent with the amplitude, phase angle, phase sequence, and frequency of the grid voltage.

[0011] In some embodiments, during the process of controlling the rotation of the inner rotor of the electromagnetic coupler by the converter controller, the converter controller accelerates the inner rotor of the electromagnetic coupler by changing the frequency and magnitude of the current input to the inner rotor of the electromagnetic coupler.

[0012] In some embodiments, when the inner rotor of the electromagnetic coupler accelerates to the rated rotational speed, the acceleration of the inner rotor of the electromagnetic coupler is stopped.

[0013] In a second aspect, the present application provides a starting system for an inertia flywheel, which uses the inertia flywheel starting method described in any embodiment of the first aspect to start the inertia flywheel. The system includes: a synchronous condenser starting module, configured to lock the rotor of the flywheel connected to the inner rotor of the electromagnetic coupler, control the rotation of the outer rotor of the electromagnetic coupler through a converter controller connected to the electromagnetic coupler, and drive the rotation of the rotor of the synchronous condenser connected to the outer rotor of the electromagnetic coupler; a judgment module, configured to judge whether the synchronous condenser meets the grid connection synchronization condition; a flywheel rotor starting module, configured to unlock the rotor of the flywheel in response to the synchronous condenser meeting the grid connection synchronization condition, control the rotation of the inner rotor of the electromagnetic coupler through the converter controller, and drive the rotation of the rotor of the flywheel; a synchronous condenser adjustment module, configured to adjust the synchronous condenser until it meets the grid connection synchronization condition in response to the synchronous condenser not meeting the grid connection synchronization condition.

[0014] In a third aspect, the present application provides an electronic device, including: a processor; a memory storing a computer program, wherein when the computer program is executed by the processor, the processor executes the inertia flywheel starting method described in any embodiment of the first aspect.

[0015] In a fourth aspect, the present application provides a readable storage medium, on which computer-readable instructions are stored, and when the instructions are executed by a processor, the processor executes the inertia flywheel starting method described in any embodiment of the first aspect.

[0016] Through the starting scheme of the inertia flywheel provided above, in the embodiment of the present application, the rotor of the flywheel connected to the inner rotor of the electromagnetic coupler is first locked, and the outer rotor of the electromagnetic coupler is controlled to rotate so as to drive the rotor of the synchronous condenser to rotate. Then, the rotor of the flywheel is unlocked, and by controlling the rotation of the inner rotor of the electromagnetic coupler, the rotor of the flywheel is driven to rotate. It is possible to complete the self-start of the inertia flywheel relying on the electromagnetic coupler without an auxiliary motor, making the start more simple and reliable. Description of the Drawings

[0017] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understandable. In the drawings, several embodiments of the present application are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, where:

[0018] Figure 1 The composition schematic diagram of the inertia flywheel in the embodiment of the present application is shown;

[0019] Figure 2 The structural diagram of the electromagnetic coupler in the embodiment of the present application is shown;

[0020] Figure 3 The exemplary flowchart of the starting method of the inertia flywheel in the embodiment of the present application is shown;

[0021] Figure 4 The composition schematic diagram of the starting system of the inertia flywheel in the embodiment of the present application is shown;

[0022] Figure 5 The composition schematic diagram of the electronic device in the embodiment of the present application is shown. Detailed Embodiments

[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0024] It should be understood that the terms "including" and "comprising" used in the specification and claims of the present application indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0025] It should also be understood that the terms used in the specification of this application are merely for the purpose of describing specific embodiments and are not intended to limit this application. As used in the specification and claims of this application, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms. It should be further understood that the term "and / or" used in the specification and claims of this application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0026] As used in this specification and the claims, the term "if" can be interpreted as "when" or "once" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrase "if determined" or "if [the described condition or event] is detected" can be interpreted as meaning "once determined" or "in response to determining" or "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]" depending on the context.

[0027] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0028] Figure 1 The composition schematic diagram of the inertia flywheel according to the embodiment of this application is shown.

[0029] As Figure 1 shown, the inertia flywheel 100 includes a flywheel 110, an electromagnetic coupler 120, a synchronous condenser 130 and a converter controller 140.

[0030] In the embodiment of this application, for the specific structure of the electromagnetic coupler 120, reference can be made to Figure 2 .

[0031] As Figure 2 shown, the electromagnetic coupler 120 includes an inner rotor 121 and an outer rotor 122. The inner rotor uses permanent magnets, and the outer rotor is provided with armature windings.

[0032] In the embodiment of this application, the rotor of the flywheel 110 is connected to the inner rotor 121 through a first transmission shaft 151, the rotor of the synchronous condenser 130 is connected to the outer rotor 122 through a second transmission shaft 152, the stator winding of the synchronous condenser 140 is incorporated into the power grid 160, and the converter controller 140 can convert the industrial frequency alternating current in the power grid 160 into alternating current of the required frequency and feed it into the outer rotor winding of the electromagnetic coupler 120, that is, feed the alternating current into the armature winding placed on the outer rotor 122 of the electromagnetic coupler 120.

[0033] In an embodiment of the present application, the rotor of the flywheel 110 is connected to the inner rotor 121 through the first transmission shaft 151, and the rotor of the synchronous condenser 130 is connected to the outer rotor through the second transmission shaft 152, so that the inertia flywheel 100 can provide active power, reactive power, and direct mechanical inertia support to the power grid.

[0034] In an embodiment of the present application, when the current output by the converter controller 140 is positive, the rotational speed of the inner rotor 121 of the electromagnetic coupler 120 is faster than the rotational speed of the outer rotor 122 of the electromagnetic coupler 120.

[0035] By making the rotational speed of the inner rotor 121 of the electromagnetic coupler 120 faster than the rotational speed of the outer rotor 122 of the electromagnetic coupler 120, the rotational speed of the resultant magnetomotive force of the inner rotor 121 of the electromagnetic coupler 120 is faster than the mechanical rotational speed of the outer rotor 122. The permanent magnet of the inner rotor 121 of the electromagnetic coupler 120 is subjected to a positive electromagnetic torque and drives the rotor of the flywheel 110 to accelerate energy storage through the first transmission shaft 161.

[0036] In an embodiment of the present application, when the current output by the converter controller 140 is negative, the rotational speed of the inner rotor 121 of the electromagnetic coupler 120 is slower than the rotational speed of the outer rotor 122 of the electromagnetic coupler 120.

[0037] By making the rotational speed of the inner rotor 121 of the electromagnetic coupler 120 slower than the rotational speed of the outer rotor 122 of the electromagnetic coupler 120, the rotational speed of the resultant magnetomotive force of the inner rotor 121 of the electromagnetic coupler 120 is slower than the mechanical rotational speed of the outer rotor 122. The permanent magnet of the inner rotor 121 of the electromagnetic coupler 120 is subjected to a negative direction and drives the rotor of the flywheel 110 to decelerate and release energy through the first transmission shaft 161.

[0038] The starting method of the inertia flywheel 100 will be described below.

[0039] Figure 3 An exemplary flowchart of the starting method 300 of the inertia flywheel according to an embodiment of the present application is shown

[0040] As Figure 3 shown, in step S310, the rotor of the flywheel 110 connected to the inner rotor 121 of the electromagnetic coupler 120 is locked, and the outer rotor 122 of the electromagnetic coupler 120 is controlled to rotate through the converter controller 140 connected to the electromagnetic coupler 120, and drives the rotor of the synchronous condenser 130 connected to the outer rotor 122 of the electromagnetic coupler 120 to rotate.

[0041] In an embodiment of the present application, the rotor of the flywheel 110 can be locked by a mechanical device, or the rotor of the flywheel 110 can be locked by other means, and the present application does not limit this here.

[0042] In an embodiment of the present application, by locking the rotor of the flywheel 110 connected to the inner rotor 121 of the electromagnetic coupler 120, at this time, the inner rotor 121 of the electromagnetic coupler 120 does not move, and the outer rotor 122 of the electromagnetic coupler 120 is movable. The electromagnetic coupler 120 is equivalent to a permanent magnet synchronous motor.

[0043] In an embodiment of the present application, during the process of controlling the rotation of the outer rotor 122 of the electromagnetic coupler 120 by the converter controller 140 connected to the electromagnetic coupler 120, the aforementioned converter controller 140 accelerates the outer rotor 122 of the electromagnetic coupler 120 by changing the frequency and magnitude of the current input to the outer rotor 122 of the electromagnetic coupler 120.

[0044] Specifically, when the outer rotor 122 of the electromagnetic coupler 120 is accelerated to the set speed, the acceleration of the outer rotor 122 of the electromagnetic coupler 120 is stopped.

[0045] In an embodiment of the present application, the aforementioned set speed is obtained through the frequency of the grid voltage. Specifically, since the rotation speed of the synchronous condenser 130 directly determines the frequency of its terminal voltage, and the frequency of the terminal voltage of the synchronous condenser 130 is consistent with the frequency of the grid voltage, which is one of the grid connection synchronization conditions, therefore, it is necessary to obtain the aforementioned set speed through the frequency of the grid voltage. During the process of obtaining the aforementioned set speed through the frequency of the grid voltage, the set speed can be obtained according to the formula n = 60f / p, where n is the set speed, f is the frequency of the grid voltage, and p is the number of pole pairs of the rotating magnetic field of the synchronous condenser 130.

[0046] In an embodiment of the present application, during the process of stopping the acceleration of the outer rotor 122 of the electromagnetic coupler 120, when it is detected that the outer rotor 122 has reached the set speed, the converter controller 140 will reduce or even completely cut off the additional current increment provided to the outer rotor 122. At this time, the converter controller 140 may switch to a different control mode, such as a speed control mode, in which only enough power is provided to overcome friction and other losses to ensure that the outer rotor 122 operates stably at the set speed.

[0047] In an embodiment of the present application, when the outer rotor 122 of the magnetic coupler 120 rotates, since the rotor of the synchronous condenser 130 is connected to the outer rotor 122 through the second transmission shaft 152, therefore, the rotation of the outer rotor 122 of the magnetic coupler 120 drives the rotation of the rotor of the synchronous condenser 130, thereby realizing the start of the synchronous condenser 130.

[0048] After performing step S310, in step S320, it is judged whether the synchronous condenser 130 meets the grid connection synchronization conditions.

[0049] In an embodiment of the present application, the grid connection synchronization condition is that the amplitude, phase angle, phase sequence, and frequency of the terminal voltage of the synchronous condenser 130 are respectively consistent with the amplitude, phase angle, phase sequence, and frequency of the grid voltage. That is, only when all the conditions that the amplitude of the terminal voltage is consistent with the amplitude of the grid voltage, the phase angle of the terminal voltage is consistent with the phase angle of the grid voltage, the phase sequence of the terminal voltage is consistent with the phase sequence of the grid voltage, and the frequency of the terminal voltage is consistent with the frequency of the grid voltage are satisfied, can it be determined that the grid connection synchronization condition is met.

[0050] After S320 is executed, in response to the synchronous condenser 130 satisfying the grid connection synchronization condition, in step S330, the rotor of the flywheel 110 is unlocked, and the inner rotor 121 of the electromagnetic coupler 120 is controlled to rotate by the aforementioned variable current controller 140, driving the rotor of the flywheel 110 to rotate.

[0051] In an embodiment of the present application, during the process of controlling the inner rotor 121 of the electromagnetic coupler 120 to rotate by the aforementioned variable current controller 140, the aforementioned variable current controller 140 accelerates the inner rotor 121 of the electromagnetic coupler 120 by changing the frequency and magnitude of the current input to the inner rotor 121 of the electromagnetic coupler 120.

[0052] In an embodiment of the present application, when the inner rotor 121 of the electromagnetic coupler 120 accelerates to the rated speed, the acceleration of the inner rotor 121 of the electromagnetic coupler 120 is stopped. By accelerating the inner rotor 121 of the electromagnetic coupler 120 to the rated speed and then stopping the acceleration, it is possible to avoid unnecessary energy loss that may be caused by continuously increasing the speed, and to avoid the risk of mechanical damage to the electromagnetic coupler 120 due to overspeed, extend its service life, and ensure long-term stable operation.

[0053] Specifically, during the process of stopping the acceleration of the inner rotor 121 of the electromagnetic coupler 120, when it is detected that the inner rotor 121 has reached the rated speed, the variable current controller 140 will reduce or even completely cut off the additional current increment provided to the inner rotor 121. At this time, the variable current controller 140 may switch to a different control mode, such as a speed control mode, in which only enough power is provided to overcome friction and other losses to ensure that the inner rotor 121 operates stably at the rated speed.

[0054] In an embodiment of the present application, when the inner rotor 121 of the magnetic coupler 120 rotates, since the rotor of the flywheel 110 is connected to the inner rotor 121 through the first transmission shaft 151, therefore, the rotation of the inner rotor 121 of the magnetic coupler 120 drives the rotor of the flywheel 110 to rotate, thereby realizing the start of the flywheel 110. At this time, both the synchronous condenser 130 and the flywheel 110 have been started, thus completing the start of the inertia flywheel.

[0055] During the above startup process, the slip and torque transfer characteristics of the magnetic coupler 120 are fully utilized to convert the electromagnetic torque applied to the magnetic coupler 120 into mechanical torque output to the rotors of the flywheel 110 and the synchronous condenser 130, enabling the magnetic coupler 120 to play the role of an auxiliary motor during startup, thus eliminating the auxiliary motor.

[0056] After executing S320, in response to the synchronous condenser 130 not meeting the grid connection synchronization conditions, the synchronous condenser 130 is adjusted and returned to step S320, and it is determined again whether the synchronous condenser 130 meets the grid connection synchronization conditions until the synchronous condenser 130 meets the grid connection synchronization conditions, and then step S330 is executed.

[0057] In the embodiment of the present application, during the adjustment process of the synchronous condenser 130, the frequency of the terminal voltage of the synchronous condenser 130 can be ensured to be strictly matched with the frequency of the grid voltage by the rotational speed of the outer rotor 122 of the magnetic coupler 120, the amplitude of the terminal voltage of the synchronous condenser 130 can be controlled by adjusting the excitation current of the synchronous condenser 130 to make it consistent with the amplitude of the grid voltage, the phase angle of the terminal voltage of the synchronous condenser 130 can be made consistent with the phase angle of the grid voltage by monitoring the sinusoidal synchronizing voltage of the synchronous condenser 130, and the phase sequence of the terminal voltage of the synchronous condenser 130 can be made consistent with the phase sequence of the grid voltage by checking and confirming the sequence of the three-phase voltages generated by the synchronous condenser 130.

[0058] In summary, through the startup scheme of the inertia flywheel provided above, in the embodiment of the present application, by first locking the rotor of the flywheel connected to the inner rotor of the electromagnetic coupler, controlling the rotation of the outer rotor of the electromagnetic coupler to drive the rotation of the rotor of the synchronous condenser, and then unlocking the rotor of the flywheel, driving the rotation of the rotor of the flywheel by controlling the rotation of the inner rotor of the electromagnetic coupler, the self-startup of the inertia flywheel can be completed by relying on the electromagnetic coupler without an auxiliary motor, making the startup more simple and reliable.

[0059] The embodiment of the present application also provides a startup system for an inertia flywheel, which can start the inertia flywheel by using the aforementioned startup method 300 of the inertia flywheel, or can also use other methods to start the inertia flywheel, and the present application does not limit this here.

[0060] Figure 4 The composition schematic diagram of the startup system 400 of the inertia flywheel in the embodiment of the present application is shown.

[0061] As Figure 4 shown, the system 400 includes a synchronous condenser startup module 410, a judgment module 420, a flywheel rotor startup module 430, and a synchronous condenser adjustment module 440.

[0062] Specifically, the synchronous condenser starting module 410 is configured to lock the rotor of the flywheel connected to the inner rotor of the electromagnetic coupler, control the rotation of the outer rotor of the electromagnetic coupler through a variable current controller connected to the electromagnetic coupler, and drive the rotation of the rotor of the synchronous condenser connected to the outer rotor of the electromagnetic coupler.

[0063] Specifically, the judgment module 420 is configured to judge whether the synchronous condenser meets the grid connection synchronization condition.

[0064] Specifically, the flywheel rotor starting module 430 is configured to unlock the rotor of the flywheel in response to the synchronous condenser meeting the grid connection synchronization condition, control the rotation of the inner rotor of the electromagnetic coupler through the variable current controller, and drive the rotation of the rotor of the flywheel.

[0065] Specifically, the synchronous condenser adjustment module 440 is configured to adjust the synchronous condenser until it meets the grid connection synchronization condition in response to the synchronous condenser not meeting the grid connection synchronization condition.

[0066] When the system 400 starts the inertia flywheel by using the foregoing inertia flywheel starting method 300, the synchronous condenser starting module 410 executes the foregoing step S310, the judgment module 420 executes the foregoing step S320, the flywheel rotor starting module 430 executes the foregoing step S330, and the synchronous condenser adjustment module 440 executes the foregoing step of adjusting the synchronous condenser. The specific execution process can be referred to the foregoing text and will not be elaborated here.

[0067] The embodiment of the present application further provides an electronic device.

[0068] Figure 5 The composition schematic diagram of the electronic device according to the embodiment of the present application is shown.

[0069] As Figure 5 shown, the electronic device 500 includes a processor 510 and a memory 520. The memory 520 stores a computer program. When the computer program is executed by the processor 510, the processor 510 executes the foregoing inertia flywheel starting method 300.

[0070] In the embodiment of the present application, the electronic device 500 may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The electronic device may include, but is not limited to, a processor 510 and a memory 520. Those skilled in the art can understand that Figure 5 merely examples of the electronic device 500 do not constitute a limitation to the electronic device 500. It may include more or fewer components than shown in the figure, or combine some components, or different components. For example, the electronic device may further include input / output devices, network access devices, buses, etc.

[0071] In an embodiment of the present application, the aforementioned processor 510 may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0072] In an embodiment of the present application, the memory 520 may be an internal storage unit of the electronic device 500, such as the hard disk or memory of the electronic device 500. The memory 520 may be an external storage device of the electronic device 500, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, Flash Card, etc. equipped on the electronic device 500. Further, the memory 520 may also include both the internal storage unit and the external storage device of the electronic device 500. The electronic device 500 is used to store computer programs and other programs and data required by the electronic device. The electronic device 500 may also be used to temporarily store data that has been output or is to be output.

[0073] In addition, an embodiment of the present application further provides a readable storage medium, on which computer-readable instructions are stored. When the instructions are executed by a processor, the processor is caused to execute the aforementioned starting method 300 of the inertia flywheel.

[0074] In an embodiment of the present application, the aforementioned readable storage medium may include, but is not limited to: various media such as USB flash drives, Read-Only Memory (ROM), Random Access Memory (RAM), mobile hard disks, magnetic disks, or optical discs that can store computer programs.

[0075] Although several embodiments of the present application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many changes, alterations, and alternative forms will occur to those skilled in the art without departing from the spirit and scope of the present application. It should be understood that various alternatives to the embodiments of the present application described herein may be employed in practicing the present application. The appended claims are intended to define the scope of the present application and thus cover equivalents or alternatives within the scope of these claims.

Claims

1. A starting method for an inertia flywheel, characterized in that, Including: Locking the rotor of the flywheel connected to the inner rotor of the electromagnetic coupler, controlling the rotation of the outer rotor of the electromagnetic coupler through a variable current controller connected to the electromagnetic coupler, and driving the rotation of the rotor of the synchronous condenser connected to the outer rotor of the electromagnetic coupler; Judging whether the synchronous condenser meets the grid connection synchronization conditions; In response to the synchronous condenser meeting the grid connection synchronization conditions, unlocking the rotor of the flywheel, controlling the rotation of the inner rotor of the electromagnetic coupler through the variable current controller, and driving the rotation of the rotor of the flywheel; In response to the synchronous condenser not meeting the grid connection synchronization conditions, adjusting the synchronous condenser until it meets the grid connection synchronization conditions.

2. The starting method of the inertia flywheel according to claim 1, characterized in that During the process of controlling the rotation of the outer rotor of the electromagnetic coupler through a variable current controller connected to the electromagnetic coupler, the variable current controller accelerates the outer rotor of the electromagnetic coupler by changing the frequency and magnitude of the current input to the outer rotor of the electromagnetic coupler.

3. The starting method of the inertia flywheel according to claim 2, characterized in that, When the outer rotor of the electromagnetic coupler accelerates to the set speed, stop accelerating the outer rotor of the electromagnetic coupler.

4. The starting method of the inertia flywheel according to claim 3, characterized in that, Obtain the set speed through the frequency of the grid voltage.

5. The starting method of the inertia flywheel according to claim 1 or 4, characterized in that, The grid connection synchronization conditions are: the amplitude, phase angle, phase sequence and frequency of the terminal voltage of the synchronous condenser are respectively consistent with the amplitude, phase angle, phase sequence and frequency of the grid voltage.

6. The starting method of the inertia flywheel according to claim 1, characterized in that, During the process of controlling the rotation of the inner rotor of the electromagnetic coupler through the variable current controller, the variable current controller accelerates the inner rotor of the electromagnetic coupler by changing the frequency and magnitude of the current input to the inner rotor of the electromagnetic coupler.

7. The starting method of the inertia flywheel according to claim 6, characterized in that, When the inner rotor of the electromagnetic coupler accelerates to the rated speed, stop accelerating the inner rotor of the electromagnetic coupler.

8. A starting system for an inertia flywheel, characterized in that, Using the starting method of the inertia flywheel described in any one of claims 1-7 to start the inertia flywheel, the system includes: A synchronous condenser starting module, configured to lock the rotor of the flywheel connected to the inner rotor of the electromagnetic coupler, control the rotation of the outer rotor of the electromagnetic coupler through a variable current controller connected to the electromagnetic coupler, and drive the rotation of the rotor of the synchronous condenser connected to the outer rotor of the electromagnetic coupler; A judgment module, configured to judge whether the synchronous condenser meets the grid connection synchronization conditions; A flywheel rotor starting module, configured to unlock the rotor of the flywheel in response to the synchronous condenser meeting the grid connection synchronization conditions, control the rotation of the inner rotor of the electromagnetic coupler through the variable current controller, and drive the rotation of the rotor of the flywheel; A synchronous condenser adjustment module, configured to adjust the synchronous condenser in response to the synchronous condenser not meeting the grid connection synchronization conditions until it meets the grid connection synchronization conditions.

9. An electronic device, characterized in that, Including: A processor; A memory, storing a computer program, wherein when the computer program is executed by the processor, the processor executes the method described in any one of claims 1-7.

10. A readable storage medium, characterized in that, Stored thereon are computer-readable instructions, which when executed by a processor cause the processor to execute the method according to any one of claims 1-7.

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