CN217590268U - Flywheel phase modulation system - Google Patents
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- CN217590268U CN217590268U CN202220721295.1U CN202220721295U CN217590268U CN 217590268 U CN217590268 U CN 217590268U CN 202220721295 U CN202220721295 U CN 202220721295U CN 217590268 U CN217590268 U CN 217590268U
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Abstract
The application provides a flywheel phase modulation system, including the flywheel, inertia conduction device and phase modifier, the flywheel is connected with the input transmission of inertia conduction device, the rotor of phase modifier is connected with the output transmission of inertia conduction device, the output speed of inertia conduction device can keep invariable, the stator of phase modifier inserts the electric wire netting so that to electric wire netting input power or follow electric wire netting absorbed power, the flywheel phase modulation system that this application provided has reactive power compensation ability and inertia response ability concurrently, can stabilize the voltage and the frequency of electric wire netting. The output rotating speed of the inertia conduction device can be kept constant, and the phase modulator can run synchronously. Will the embodiment of the utility model provides a flywheel phase modulation system is connected with the electric wire netting, need not to adopt power electronic device, has improved the electric wire netting and has resisted extensive active, idle impact's ability, makes electric power system can safety and stability's operation to the electric wire netting high efficiency has been improved and the ability of accepting the new forms of energy is received.
Description
Technical Field
The utility model belongs to the technical field of the motor technique and specifically relates to a flywheel phase modulation system is related to.
Background
With the development of a new round of energy revolution mainly based on clean energy, the proportion of new energy in the power grid in China is higher and higher. However, in the new energy technology, a power electronic device is mostly connected to a power grid, and the power electronic device does not have a rotating structure similar to a synchronous machine, does not have rotational inertia, cannot actively provide necessary voltage and frequency support for the power grid, and cannot provide necessary damping action. Especially as the penetration of distributed energy sources connected to the grid via power electronics is higher and higher, the total moment of inertia of the grid is decreasing and thus the risk of large frequency deviations of the grid when heavy loads or sudden changes of the power supply occur is increasing. The access of a high proportion of power electronic devices also results in a continuous weakening of the voltage supporting capability of the power system, which puts more and more pressure on the safe and stable operation of the power system. In order to ensure the normal operation of a power grid and electric equipment and enable the power grid to resist large-scale active and reactive impacts, a certain adjusting device for supporting the dynamic adjustment capability of the power grid is urgently needed to improve the capability of the power grid for efficiently receiving new energy.
SUMMERY OF THE UTILITY MODEL
The present invention is made based on the discovery and recognition by the inventors of the following facts and problems:
flywheel energy storage is an energy storage technology that stores energy in the form of kinetic energy, and the energy storage/release is realized by accelerating/decelerating a rotor by a motor/generator. The main advantages of flywheel energy storage are fast climbing capability, high energy conversion efficiency, long service life and the like, and the flywheel energy storage has the unique advantages in providing auxiliary services such as inertia and frequency adjustment. And the flywheel has no geographical restriction, can easily install, has the advantage that can promote and can large-scale the duplication.
Currently, the existing flywheel energy storage technology uses a power electronic device to assist a motor/generator to perform a mutual conversion process between kinetic energy and electric energy. When the system needs to store electric energy, the system supplies alternating current transmitted from the outside to the motor in an AC/DC mode so as to drive the flywheel rotor to rotate and store energy; when discharging is needed, the power electronic device decouples the rotor inertia of the flywheel rotor, and plays roles of rectification, frequency modulation and voltage stabilization so as to meet the power utilization requirement of the load. However, the power electronic device does not have rotational inertia, and is difficult to participate in power grid inertia response, so that the flywheel energy storage technology cannot solve the problem that the total rotational inertia proportion is continuously reduced due to large-scale use of the power electronic device in the current power grid.
According to the previous research results and the national standard requirements, the local reactive compensation of the new energy region by using the small distributed phase modulator is one of the main technical schemes for solving the voltage stability level problem of the new energy power grid at present. However, the phase modifier has small rotational inertia and relatively lacks the inertial support capability of a power grid. Therefore, how to solve new forms of energy electric wire netting voltage and frequency stability problem simultaneously, improve the electric wire netting and resist extensive active, idle impact's ability, be the utility model discloses one of the technical problem who aims at solving.
Therefore, the embodiment of the utility model provides a flywheel phase modulation system.
The utility model discloses flywheel phase modulation system includes: the motor comprises a flywheel, an inertia conduction device and a phase modulator, wherein the flywheel is in transmission connection with an input end of the inertia conduction device, a rotor of the phase modulator is in transmission connection with an output end of the inertia conduction device, the output rotating speed of the inertia conduction device can be kept constant, and a stator of the phase modulator is connected to a power grid so as to input power to the power grid or absorb power from the power grid.
The flywheel phase modulation system provided by the embodiment of the application has reactive power compensation capability (phase modulation function) and inertia response capability, and can stabilize the voltage and frequency of a power grid. Under the phase modulation working condition, the flywheel phase modulation system maintains the voltage of a power grid through a phase modulator, so that the stability of a power system is improved, and the power factor is improved; under the inertia response working condition, the flywheel phase modulator performs inertia supporting action on a power grid by using the rotary inertia of the rotary flywheel, maintains the frequency of the power grid, and overcomes the defect of the inertia supporting capacity of the phase modulator. In addition, the flywheel phase modulation system provided by the embodiment of the application is provided with an inertia conduction device for conducting the rotary inertia, the output rotating speed of the inertia conduction device can be kept constant, and the phase modulator can run synchronously.
Will the embodiment of the utility model provides a flywheel phase modulation system is connected with the electric wire netting, need not to adopt the decoupling zero of power electronic device, rectification, frequency modulation, steady voltage, solved the problem that electric power system's that leads to by power electronic device's extensive use in the present electric wire netting voltage support and inertia support capacity weaken, improved the electric wire netting and resisted extensive active, reactive shock's ability, make electric power system can the operation of safety and stability to the ability of new forms of energy is admitted to the electric wire netting high efficiency has been improved.
In some embodiments, the input rotational speed of the inertia transfer means is equal to the rotational speed of the flywheel and the output rotational speed of the inertia transfer means is equal to the rotational speed of the rotor of the phase modulator.
In some embodiments, the inertia transfer means is a variator and the variator ratio is adjustable so as to maintain the output speed constant.
In some embodiments, the inertia transfer apparatus is a continuously variable transmission.
In some embodiments, the inertia conducting means is a permanent magnet transmission, a hydraulic transmission, a magnetorheological fluid transmission, a gear transmission, a magnetic coupler transmission, a slip asynchronously adjustable transmission, or a doubly fed asynchronously adjustable transmission.
In some embodiments, the flywheel phasing system further comprises a first drive shaft connected between the flywheel and the inertia conductive means and a second drive shaft connected between the inertia conductive means and the phase modulator.
In some embodiments, the output speed of the inertia conductive apparatus is constant at 3000rpm.
In some embodiments, the phase modulator is further configured to drive the flywheel up to a rated speed.
In some embodiments, the flywheel phasing system further comprises an electric motor in driving connection with the flywheel, wherein the electric motor is used for driving the flywheel to rotate up to the rated rotation speed.
In some embodiments, the electric motor is located on a side of the flywheel remote from the inertia conductive means, or the electric motor is located between the flywheel and the inertia conductive means.
Drawings
Fig. 1 is a schematic structural diagram of a flywheel phase modulation system according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a flywheel phase modulation system according to a second embodiment of the present invention.
Fig. 3 is an excitation adjusting curve of the phase modulator according to the embodiment of the present invention.
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Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.
The basic structure of the flywheel phase modulation system provided by the embodiment of the present invention is described below with reference to fig. 1 to 2. The flywheel phase modulation system comprises a flywheel 1, a phase modulator 2 and an inertia conduction device 3, wherein the flywheel 1 is in transmission connection with the input end of the inertia conduction device 3, a rotor of the phase modulator 2 is in transmission connection with the output end of the inertia conduction device 3, the output rotating speed of the inertia conduction device 3 can be kept constant, a stator of the phase modulator 2 is connected to a power grid, and the flywheel phase modulation system has a phase modulation working condition and an inertia response working condition.
In the phase modulation regime, phase modulator 2 is used to provide or absorb reactive power into the grid to maintain the grid voltage. Specifically, when the grid voltage drops, phase modulator 2 outputs reactive power to the grid, and when the grid voltage rises, phase modulator 2 absorbs reactive power from the grid.
Under the inertia response working condition, the rotating speed of the flywheel 1 is increased to store kinetic energy or reduced to release the kinetic energy, and active power is supplied to or absorbed from the power grid through the phase modulator 2, so that the frequency fluctuation of the power grid is controlled, and the inertia supporting effect is achieved on the power grid. Specifically, when the frequency of the power grid is reduced, the rotating speed of the flywheel 1 is reduced to release kinetic energy, the rotational inertia of the flywheel 1 is output at a constant speed through the inertia conduction device 3, the inertia conduction device 3 drives a rotor of the phase modulator 2 to rotate, and the phase modulator 2 inputs constant-frequency current to the power grid. By arranging the inertia conduction device 3, the rotor rotating speed of the phase modulator 2 can be kept constant without being influenced by the rotating speed of the flywheel 1, so that the phase modulator 2 can synchronously run with a power grid.
The flywheel phase modulation system provided by the embodiment of the application has reactive power compensation capability (phase modulation function) and inertia response capability, and can stabilize the voltage and frequency of a power grid. Under the phase modulation working condition, the flywheel phase modulation system maintains the voltage of a power grid through a phase modulator, so that the stability of a power system is improved, and the power factor is improved; under the inertia response working condition, the flywheel phase modulator utilizes the rotary inertia of the rotary flywheel to carry out inertia supporting action on a power grid, maintains the frequency of the power grid and overcomes the defect of the inertia supporting capacity of the phase modulator. In addition, the flywheel phase modulation system provided by the embodiment of the application is provided with an inertia conduction device for conducting the rotary inertia, the output rotating speed of the inertia conduction device can be kept constant, and the phase modulator can run synchronously.
Will the embodiment of the utility model provides a flywheel phase modulation system is connected with the electric wire netting, need not to adopt power electronic device decoupling zero, rectification, frequency modulation, steady voltage, has solved the problem that the electric power system's that leads to by power electronic device's extensive use in the present electric wire netting voltage support and inertia support ability weaken, has improved the electric wire netting and has resisted extensive active, reactive shock's ability, makes electric power system can safety and stability's operation to the high-efficient ability of admitting the new forms of energy of electric wire netting has been improved.
The first embodiment of the present invention is described below with reference to fig. 1.
As shown in fig. 1, the flywheel phasing system comprises a flywheel 1, a phase modulator 2, an inertia transfer means 3, a first drive shaft 41 and a second drive shaft 42.
The phase modulator 2 can be switched between phase modulation, generator, motor modes. Under the working condition of phase modulation of a flywheel phase modulation system, the phase modulator 2 can be switched to a phase modulation mode for phase modulation, under the working condition of inertia response of the flywheel phase modulation system, the phase modulator 2 can be switched to a generator mode for transmitting power to a power grid, kinetic energy stored in the flywheel 1 is converted into electric energy to be input into the power grid, and the phase modulator can also be switched to a motor mode for storing energy in the flywheel 1, namely, the electric energy is absorbed from the power grid and converted into the kinetic energy to be stored in the flywheel 1.
The working principle of the phase modulator 2 in the phase modulation mode is described below:
the phase modulator 2 works by adjusting the phase angle between the voltage and the current to adjust the reactive power output by the phase modulator. The phase modulator 2 can be regarded as a synchronous motor in a special operating state, and the reactive power of the phase modulator 2 can be conveniently changed by adjusting the exciting current. In the present embodiment, the phase modulator 2 controls the excitation current by an excitation system (not shown in the figure).
As shown in fig. 3, phase modulator 2 has two operating states, i.e. an over-excited state and an under-excited state, and the operating state of phase modulator 2 is adjusted according to the needs of the system, e.g. when the voltage of the power grid is too low, phase modulator 2 supplements reactive power to the power grid, which can reduce voltage drop, and when the voltage of the power grid is too high, it makes the under-excited state, and phase modulator 2 absorbs reactive power from the power grid, which can prevent the voltage of the power grid from rising, thereby maintaining the voltage of the power grid at a certain level.
The phase modulation process of the phase modulator 2 is as follows, when the voltage of the power grid is too low, the inductive impedance of the load is increased, because the stator of the phase modulator 2 is connected with the large power grid, the armature magnetic field direction corresponding to the stator current lags behind and is opposite to the exciting magnetic field direction of the rotor, the air gap magnetic flux of the phase modulator 2 is reduced, namely the demagnetizing armature reaction occurs, the induced electromotive force is reduced, and the electronic voltage of the motor is reduced (the situation is that a micro-grid small-capacity system only has one synchronous motor, and the infinite reverse pull voltage of the large power grid is not considered). At this time, the excitation system increases the excitation current of the phase modulator 2, so that the phase modulator 2 is changed from a normal excitation state to an overexcitation state. The exciting current is in direct proportion to the exciting magnetic field, so that the exciting magnetic field is increased, the air gap magnetic flux is increased, the induced electromotive force is increased, the output voltage of the stator end of the phase modulator 2 is increased, and the voltage of a power grid is pulled to be increased. When the capacitive load is increased, the stator current is advanced, and the direction of the corresponding armature magnetic field is advanced, the magnetic flux in the direction of the excitation magnetic field is increased, the induced electromotive force is increased, and the output voltage of the stator end of the phase modulator 2 is also increased. When the voltage of the power grid rises, the excitation system reduces the excitation current, the phase modulator 2 is adjusted to be in an underexcitation state, the excitation magnetic field is reduced, the air gap magnetic flux is reduced, the induced electromotive force is reduced, the output voltage of the stator end is reduced, and the voltage of the micro-grid is pulled to be reduced.
Inertia transfer means 3 are connected between the flywheel 1 and the phase modifier 2 for transferring the rotational inertia. Specifically, the inertia transfer apparatus 3 has an inertia moment input and an inertia moment output. A first drive shaft 41 is connected between the flywheel 1 and the rotary inertia input of the inertia conduction means 3 and a second drive shaft 42 is connected between the rotary inertia output of the inertia conduction means 3 and the phase modifier 2. In other words, the rotational inertia input is drivingly connected to the flywheel 1 via the first transmission shaft 41, and the rotational inertia output is drivingly connected to the rotor of the phase modifier 2 via the second transmission shaft 42. The stator of the phase modulator 2 is connected to the power grid to compensate or draw active power or reactive power to the power grid. In the present embodiment, the input rotational speed of the inertia transfer means 3 is equal to the rotational speed of the flywheel 1, and the output rotational speed of the inertia transfer means 3 is equal to the rotational speed of the rotor of the phase modulator 2.
The output rotating speed of the rotary inertia output end of the inertia conduction device 3 can be kept constant, namely the rotating speed of the second transmission shaft 42 can be kept constant, so that the rotor of the phase modulator 2 can rotate at a fixed rotating speed, the phase modulator 2 can reach a synchronous running state, decoupling of a power electronic device is not needed, and the synchronization characteristic of a power grid is improved.
Further, the inertia transfer means 3 is a speed change means and the speed change ratio is adjustable so that the rotational speed of the output of the rotational inertia can be kept constant. The speed ratio of the inertia transmitting means 3 is a ratio of the input rotation speed to the output rotation speed of the inertia transmitting means 3. The input rotation speed of the inertia transfer means 3 is the rotation speed of the input end of the rotational inertia, and the output rotation speed of the inertia transfer means 3 is the rotation speed of the output end of the rotational inertia. The output rotational speed of the inertia transfer apparatus 3 is determined by the speed ratio of the inertia transfer apparatus 3, and it can be said that the speed ratio of the inertia transfer apparatus 3 is determined by the output rotational speed and the input rotational speed of the inertia transfer apparatus 3.
It will be appreciated by those skilled in the art that the rotational speed of the flywheel 1 is typically constantly changing, and that by adjusting the transmission ratio of the inertia transfer means 3, the rotational speed at the output of the rotational inertia can be kept constant regardless of changes in the rotational speed of the flywheel rotor 1. That is, in order to keep the rotational speed of the rotational inertia output constant, a preset value is set for the rotational speed of the rotational inertia output, an ideal gear ratio of the inertia transfer device 3 can be calculated according to the current rotational speed of the flywheel 1, and the gear ratio of the inertia transfer device 3 is continuously adjusted according to the ideal gear ratio, so that the rotational speed of the rotational inertia output can be kept constant, and the phase modulator 2 can achieve a synchronous operation state.
Preferably, the inertia transmitting means 3 is a continuously variable transmission, i.e. the inertia transmitting means 3 can continuously obtain any transmission ratio within the allowable transmission range. The inertia conduction device 3 has a stepless speed change function, the speed change ratio of the inertia conduction device 3 can be adjusted more flexibly, and the stability of the output rotating speed of the inertia conduction device 3 is improved.
Further alternatively, the inertia transfer device 3 is a permanent magnet speed change device, a hydraulic speed change device, a magnetorheological fluid device, a gear transmission device, a magnetic coupler speed change device, a slip asynchronous adjustable speed change device or a double-fed asynchronous adjustable speed change device with a stepless speed change function.
Alternatively, the output speed of the inertia conduction device 3 is constant at 3000rpm, that is, the phase modulator 2 can achieve a synchronous operation state with the power grid at a constant speed of 3000rpm, and output active power with a frequency of 50Hz to the power grid or convert the active power from the power grid into kinetic energy to be stored in the flywheel under the inertia response working condition.
It should be noted that the national grid frequency reference line is 50Hz, and the output rotation speed of the inertia conduction device 3 may be constant at 3000rpm. The foreign power grid frequency reference line is 60Hz, the output rotating speed of the inertia conduction device 3 can be constant at 3600rpm, namely the output rotating speed of the inertia conduction device 3 can be adjusted according to the frequency reference of the power grid.
The following describes the operation processes of the flywheel phase modulation system provided in this embodiment, including a charging process, a phase modulation process, an inertia response process, and a standby process.
The charging process of the flywheel phase modulation system, namely the process of converting electric energy into mechanical energy to be stored in the flywheel 1, specifically means that the rotating speed of the flywheel 1 is driven by the motor to rise to a preset rotating speed, and the energy storage is realized. The flywheel phase modulation system provided by the embodiment realizes the charging of the flywheel 1 through the phase modulator 2, and the starting process of the phase modulator 2 is realized through other auxiliary equipment. Specifically, when the rotation speed of the flywheel 1 is lower than the preset rotation speed, the phase modulator 2 is switched to the motor mode state to drive the flywheel 1 to rotate for energy storage. When the rotational speed of the flywheel 1 reaches a preset rotational speed, the phase modulator 2 stops transmitting power to the flywheel 1, and the phase modulator 2 switches to a phase modulation mode.
In other embodiments, the adjustment of the rotational speed of the flywheel 1 is made more flexible. The ideal rotating speed of the flywheel 1 is set to a preset rotating speed range, the preset rotating speed range has a lower rotating speed limit and an upper rotating speed limit, and when the rotating speed of the flywheel 1 is within the preset rotating speed range, the rotating speed of the flywheel 1 is regarded as ideal. Specifically, when the rotating speed of the flywheel 1 is lower than the lower rotating speed limit, the phase modulator 2 is switched to a motor mode state to drive the flywheel 1 to rotate for energy storage. When the rotation speed of the flywheel 1 is higher than the upper limit of the rotation speed, the phase modulator 2 stops transmitting power to the flywheel 1, and the phase modulator 2 switches to a phase modulation mode state.
The standby process of the flywheel phase modulation system means that when the power factor, the voltage and the frequency of a power grid are in ideal states and the rotating speed of the flywheel 1 is also in ideal states, the flywheel phase modulation system does not need to provide inertia support and reactive power compensation for the power grid, and the flywheel phase modulation system enters a standby state. In a standby state, the flywheel 1 consumes a small amount of mechanical energy to maintain the no-load loss of the system, and the inertia conduction device 3 adjusts the transmission ratio to enable the rotor of the phase modulator 2 to rotate at a fixed rotating speed so as to achieve a synchronous operation state.
The phase modulation process of the flywheel phase modulation system means that when the voltage of a power grid changes (rises or falls), the flywheel phase modulation system enters a phase modulation working condition, a flywheel 1 follows up, an inertia conduction device 3 maintains constant output rotating speed, and a phase modulator 2 is connected to the grid and runs synchronously. The exciting current of the phase modulator 2 is adjusted to make the phase modulator 2 output reactive power or absorb reactive power.
The inertia response process of the flywheel phase modulation system means that when the frequency of a power grid fluctuates, the flywheel phase modulation system enters an inertia response working condition, the flywheel 1 follows up, the inertia conduction device 3 maintains constant output rotating speed, and the phase modulator 2 is connected to the grid and runs synchronously. When the power grid frequency f is reduced ((50-0.033) Hz is not more than f and less than 50 Hz), the rotating speed of the phase modulator 2 is reduced along with the reduction of the power grid frequency, the second transmission shaft 42 drives the flywheel 1 to synchronously decelerate through the inertia conduction device 3, the flywheel 1 decelerates to release kinetic energy, and the inertia moment caused by the rotary inertia of the flywheel 1 prevents the phase modulator 2 from further decelerating, so that the power grid frequency is prevented from further reducing, and an inertia supporting effect is achieved. It should be noted that in this process, the kinetic energy released by the flywheel 1 is converted into electric energy by the phase modulator 2 and is input into the power grid, i.e. the phase modulator 2 inputs active power into the power grid, and the phase modulator 2 inputs constant frequency electric energy into the power grid due to the action of the inertia conduction device 3.
On the contrary, when the frequency f of the power grid rises (for example, when 50Hz < f ≦ 50+0.033 Hz), the rotation speed of the phase modulator 2 rises along with the rise of the frequency of the power grid, the flywheel 1 is driven by the second transmission shaft 42 through the inertia conduction device 3 to be synchronously accelerated, the flywheel 1 accelerates to store kinetic energy, and the inertia moment caused by the rotational inertia of the flywheel 1 hinders the phase modulator 2 from further accelerating, so that the frequency of the power grid is prevented from further increasing, and the inertia supporting function is achieved. In this process, electrical energy is converted into kinetic energy by a phase modulator 2 and stored in a flywheel 1.
In other words, under the inertia response working condition, the energy overflowing from the power grid is stored in the flywheel 1 according to the overflow proportion or the energy is extracted from the flywheel 1 according to the missing proportion to supplement the power grid, and the frequency fluctuation of the power grid is reduced.
The specific control logic of the flywheel phase modulation system provided by the embodiment is as follows:
when the voltage (or power factor) of the power grid is within an allowable range and the rotating speed of the phase modulation machine 2 is maintained at a desired rotating speed (such as 3000 rpm), the flywheel phase modulation system enters a standby state;
when the network voltage (or power factor) is within an allowable range and the rotating speed of the phase modifier 2 deviates from an ideal rotating speed (such as 3000 rpm), the flywheel phase modification system carries out an inertia response state;
when the voltage (or power factor) of the power grid is beyond an allowable range and the rotating speed of the phase modulation machine 2 is maintained at a desired rotating speed (such as 3000 rpm), the phase modulation state of the flywheel phase modulation system is carried out;
when the network voltage (or power factor) is out of the allowable range and the speed of the phase modulator 2 deviates from the ideal speed (e.g. 3000 rpm), the flywheel phase modulation system enters a phase modulation and inertia response state.
Next, a flywheel phase modulation system according to a second embodiment of the present invention is described with reference to fig. 2. In this embodiment, the flywheel phasing system comprises an electric motor 5, a flywheel 1, an inertia transfer means 3 and a phase modulator 2.
The first transmission shaft 41 is in transmission connection with the motor 5, the flywheel 1 and the rotational inertia input end of the inertia conduction device 3. As shown in fig. 2, in the present embodiment, the motor 5 is located on the side of the flywheel 1 remote from the inertia conductive apparatus 3. Alternatively, the electric motor 5 may be located between the flywheel 1 and the inertia transfer apparatus 3.
In the present embodiment, the charging process of the flywheel 1 is performed by the motor 5. This is because the rotor shaft of the phase modulator 2 is usually thin to reduce losses and cannot output large torque, so that the charging process of the flywheel 1 with the additional electric motor is more efficient when the flywheel 1 has a large rated speed and a large moment of inertia. In addition, motor 5 can assist phase modulator 2 in starting up, provides rotor rotational kinetic energy for phase modulator 2 when starting up.
Specifically, during the charging process, the flywheel 1 is charged by the motor 5 (essentially, electric energy is converted into mechanical energy to be stored in the flywheel 1), the power supply provides electric energy for the motor 5, and the motor 5 drives the flywheel 1 to rotate through the first transmission shaft 41 until the flywheel 1 reaches a rated rotation speed.
For the operation process under other working conditions of the flywheel phase modulation system in this embodiment, reference may be made to embodiment one, and details are not described here.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A flywheel phasing system, comprising: the motor comprises a flywheel, an inertia conduction device and a phase modulator, wherein the flywheel is in transmission connection with an input end of the inertia conduction device, a rotor of the phase modulator is in transmission connection with an output end of the inertia conduction device, the output rotating speed of the inertia conduction device can be kept constant, and a stator of the phase modulator is connected to a power grid so as to input power to the power grid or absorb power from the power grid.
2. The flywheel phase modulation system of claim 1 wherein an input rotational speed of the inertia conductive means is equal to a rotational speed of the flywheel and an output rotational speed of the inertia conductive means is equal to a rotational speed of a rotor of the phase modulator.
3. The flywheel phasing system of claim 1, wherein the inertia transfer means is a variator and the variator ratio is adjustable to maintain a constant output speed.
4. A flywheel phasing system according to claim 3, wherein the inertia transfer means is a continuously variable transmission.
5. The flywheel phasing system of claim 4, wherein the inertia-conducting means is a permanent magnet variator, a hydraulic variator, a magnetorheological fluid variator, a gear drive, a magnetic coupler variator, a slip asynchronously-adjustable variator, or a doubly-fed asynchronously-adjustable variator.
6. A flywheel phasing system according to any of claims 1 to 5, further comprising a first drive shaft connected between the flywheel and the inertia conductive means and a second drive shaft connected between the inertia conductive means and the phase modifier.
7. A flywheel phasing system according to any of claims 1 to 5, in which the output speed of the inertia conductive means is constant at 3000rpm.
8. The flywheel phasing system of claim 1, wherein the phase modulator is further configured to drive the flywheel up to a rated speed.
9. The flywheel phasing system of claim 1, further comprising an electric motor drivingly connected to the flywheel, the electric motor being configured to drive the flywheel up to a nominal speed.
10. A flywheel phasing system according to claim 9, wherein the motor is located on a side of the flywheel remote from the inertia conductive means, or wherein the motor is located between the flywheel and the inertia conductive means.
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| CN116995691A (en) * | 2023-08-08 | 2023-11-03 | 三峡国际能源投资集团有限公司 | An integrated variable speed camera system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116995691A (en) * | 2023-08-08 | 2023-11-03 | 三峡国际能源投资集团有限公司 | An integrated variable speed camera system |
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